{
  "spore": "profile",
  "id": "cirlex-polyimide",
  "spore_version": "0.2",
  "family": "polyimides",
  "name": "Cirlex all-polyimide laminate",
  "abbreviation": "Cirlex",
  "role": "thick adhesiveless all-polyimide laminate for thermal barriers, shims and electrical isolation",
  "category": "polymers",
  "type": "polyimides",
  "summary": "Cirlex is a thick all-polyimide material made by Fralock from DuPont Kapton adhesiveless polyimide film, joined by Fralock's Adhesiveless Lamination Technology into one monolithic piece. Fralock's typical-value data sheet gives a glass transition temperature of 351 degC and a thermal conductivity of 0.17 W/m K. Its flyer says the material keeps its integrity from -269 degC to 351 degC. The listed typical values are averages that Fralock says should not be used in writing specifications.\n",
  "best_for": "Thick, dimensionally stable polyimide parts for thermal barriers, sealing shims, stand-offs and electrical isolation, where an adhesive-free laminate is wanted",
  "weakest_at": "Outgassing and long-term exposure to strong acids and strong oxidizers. The Fralock data sheet gives a total mass loss of 0.5 % in vacuum, and the Kapton safety sheet lists strong acids and strong oxidizers as incompatible.",
  "identity": {
    "formula": "Poly(4,4'-oxydiphenylene-pyromellitimide), the Kapton polyimide chemistry; Fralock prints no formula for Cirlex",
    "designations": [
      {
        "system": "Trade name",
        "code": "Cirlex",
        "source": "fralock-web",
        "where": "Page title and product name on the Cirlex engineered solutions page"
      }
    ],
    "source": "wiki-kapton",
    "where": "Chemistry and variants section (the chemical name for Kapton K and HN); Cirlex is made from Kapton film per the Fralock datasheet, and no grade letter is printed for the Kapton film used"
  },
  "tags": {
    "environments": [],
    "stresses": [
      "extreme-cold"
    ],
    "applications": [
      "thermal-control",
      "structures",
      "electronics-and-chips"
    ]
  },
  "properties": [
    {
      "benchmark": "ultimate_compressive_strength",
      "label": "Ultimate compressive strength at 23 degC",
      "value": 45.26,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "23 degC (73.4 degF)",
        "standard": "ASTM D695-15",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property), averaged",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Compressive Strength, 23 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_compressive_strength",
      "label": "Ultimate compressive strength at 100 degC",
      "value": 42.79,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "100 degC (212 degF)",
        "standard": "ASTM D695-15",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Compressive Strength, 100 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_compressive_strength",
      "label": "Ultimate compressive strength at 200 degC",
      "value": 35.61,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "200 degC (392 degF)",
        "standard": "ASTM D695-15",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Compressive Strength, 200 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Ultimate tensile strength at 23 degC",
      "value": 32.49,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "23 degC (73.4 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Tensile Strength, 23 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Ultimate tensile strength at 100 degC",
      "value": 21.4,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "100 degC (212 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Tensile Strength, 100 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Ultimate tensile strength at 200 degC",
      "value": 17.4,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "200 degC (392 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Tensile Strength, 200 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Ultimate tensile strength at 250 degC",
      "value": 16.5,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "250 degC (482 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Ultimate Tensile Strength, 250 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "elastic_modulus",
      "label": "Tensile modulus at 23 degC",
      "value": 330,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "23 degC (73.4 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Tensile Modulus, 23 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "elastic_modulus",
      "label": "Tensile modulus at 100 degC",
      "value": 488,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "100 degC (212 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Tensile Modulus, 100 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "elastic_modulus",
      "label": "Tensile modulus at 200 degC",
      "value": 402,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "200 degC (392 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Tensile Modulus, 200 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "elastic_modulus",
      "label": "Tensile modulus at 250 degC",
      "value": 381,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "250 degC (482 degF)",
        "standard": "ASTM D638",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Tensile Modulus, 250 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "yield_strength",
      "label": "Tensile yield strength at 3 % elongation, 23 degC",
      "value": 6.11,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "23 degC (73.4 degF)",
        "standard": "ASTM D638",
        "basis": "typical value; the sheet prints the yield as the stress at 3 % elongation"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Tensile Yield @ 3% Elongation, 23 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "yield_strength",
      "label": "Tensile yield strength at 3 % elongation, 200 degC",
      "value": 5.49,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "200 degC (392 degF)",
        "standard": "ASTM D638",
        "basis": "typical value; the sheet prints the yield as the stress at 3 % elongation"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Tensile Yield @ 3% Elongation, 200 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "shear_strength",
      "label": "Shear strength at 100 degC",
      "value": 6.4,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "100 degC (212 degF)",
        "standard": "ASTM D3846",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Shear Strength, 100 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "shear_strength",
      "label": "Shear strength at 200 degC",
      "value": 5.4,
      "bound": "exact",
      "unit": "kpsi",
      "scope": "material",
      "conditions": {
        "temperature": "200 degC (392 degF)",
        "standard": "ASTM D3846",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Shear Strength, 200 degC row",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "poissons_ratio",
      "label": "Poisson's ratio at 23 degC",
      "value": 0.329,
      "bound": "exact",
      "unit": "-",
      "scope": "material",
      "conditions": {
        "temperature": "23 degC (73.4 degF)",
        "standard": "ASTM D3039-17",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Typical value printed in the Fralock data sheet table (Mechanical Property)",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Mechanical Property table, row Poisson's Ratio",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "specific_gravity",
      "label": "Specific gravity of Cirlex",
      "value": 1.42,
      "bound": "exact",
      "unit": "-",
      "scope": "material",
      "conditions": {
        "basis": "typical value; the sheet gives no temperature for this row"
      },
      "method": "Physical Property table, row Specific Gravity, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Physical Property table, row Specific Gravity",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "dielectric_strength",
      "label": "Dielectric strength of Cirlex",
      "value": 2790,
      "bound": "exact",
      "unit": "V/mil",
      "scope": "material",
      "conditions": {
        "basis": "typical value; the flyer prints the same figure as a lower bound (greater than 2790 volts/mil)"
      },
      "method": "Electrical Property table, row Dielectric Strength, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Electrical Property table, row Dielectric Strength",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "dielectric_constant",
      "label": "Dielectric constant of Cirlex at 10 kHz",
      "value": 3.45,
      "bound": "exact",
      "unit": "-",
      "scope": "material",
      "conditions": {
        "frequency": "10 kHz",
        "temperature": "25 degC",
        "standard": "ASTM D150",
        "basis": "typical value"
      },
      "method": "Electrical Property table, row Dielectric Constant DC at 10 kHz",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Electrical Property table, row Dielectric Constant DC @ 10KHz",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "dissipation_factor",
      "label": "Dissipation factor of Cirlex",
      "value": 0.004,
      "bound": "exact",
      "unit": "-",
      "scope": "material",
      "conditions": {
        "standard": "ASTM D150",
        "basis": "typical value; the table prints no test frequency for this row"
      },
      "method": "Electrical Property table, row Dielectric Constant Dissipation Factor",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Electrical Property table, row Dielectric Constant Dissipation Factor",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "thermal_conductivity",
      "label": "Thermal conductivity of Cirlex",
      "value": 0.17,
      "bound": "exact",
      "unit": "W/m K",
      "scope": "material",
      "conditions": {
        "temperature": "not printed in the table",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Thermal Property table, row Thermal Conductivity, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row Thermal Conductivity",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "glass_transition_temperature",
      "label": "Glass transition temperature of Cirlex",
      "value": 351,
      "bound": "exact",
      "unit": "degC",
      "scope": "material",
      "conditions": {
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Thermal Property table, row Glass Transition, Tg, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row Glass Transition, Tg",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "specific_heat",
      "label": "Specific heat of Cirlex",
      "value": 1.09,
      "bound": "exact",
      "unit": "J/g K",
      "scope": "material",
      "conditions": {
        "temperature": "not printed in the table",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Thermal Property table, row Specific Heat, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row Specific Heat",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "cte",
      "label": "Coefficient of thermal expansion, in-plane",
      "value": 30,
      "bound": "exact",
      "unit": "µm/m °C",
      "scope": "material",
      "conditions": {
        "temperature_range": "23 to 350 degC",
        "standard": "ASTM E831",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Thermal Property table, row CTE In-plane, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row CTE In-plane (23 to 350 degC)",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "cte",
      "label": "Coefficient of thermal expansion, through thickness",
      "value": 118,
      "bound": "exact",
      "unit": "µm/m °C",
      "scope": "material",
      "conditions": {
        "temperature_range": "23 to 350 degC",
        "standard": "ASTM E831",
        "basis": "typical value, Cirlex all-polyimide laminate"
      },
      "method": "Thermal Property table, row CTE Thru-thickness, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row CTE Thru-thickness (23 to 350 degC)",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "total_mass_loss",
      "label": "Total mass loss (outgassing TML)",
      "value": 0.5,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "standard": "ASTM E595",
        "basis": "typical value; the table prints 0.5% (the flyer prints 0.50%)"
      },
      "method": "Thermal Property table, row Outgassing TML, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row Outgassing TML",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "collected_volatile_condensable_material",
      "label": "Collected volatile condensable material (outgassing CVCM), upper bound",
      "value": 0.01,
      "bound": "upper",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "standard": "ASTM E595",
        "basis": "printed as less than 0.01 %, so 0.01 is an upper bound"
      },
      "method": "Thermal Property table, row Outgassing CVCM, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row Outgassing CVCM",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "water_vapor_regain",
      "label": "Water vapor regain (outgassing), ASTM E595",
      "value": 0.42,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "standard": "ASTM E595",
        "basis": "typical value"
      },
      "method": "Thermal Property table, row Outgassing Water Vapor Regain, as printed in the Fralock data sheet",
      "status": "ground",
      "source": "fralock-ds",
      "where": "Thermal Property table, row Outgassing Water Vapor Regain",
      "source_detail": {
        "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
        "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
        "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
        "year": 2020,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "min_service_temp",
      "label": "Lowest temperature the laminate keeps its integrity (Fralock claim)",
      "value": -269,
      "bound": "exact",
      "unit": "degC",
      "scope": "material",
      "conditions": {
        "basis": "Fralock statement of integrity over the range, not a tested rating of one part"
      },
      "method": "Features list, as printed in the Fralock flyer",
      "status": "ground",
      "source": "fralock-flyer",
      "where": "Features list, first bullet (\"from -269 C (-452 F)\")",
      "source_detail": {
        "title": "Cirlex Engineered Thick All-Polyimide Material, Technical Data Sheet, REV051923",
        "id": "Fralock, file Cirlex-Flyer-Data-Sheet_051923.pdf",
        "url": "https://www.fralock.com/wp-content/uploads/2023/05/Cirlex-Flyer-Data-Sheet_051923.pdf",
        "year": 2023,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    },
    {
      "benchmark": "max_service_temp",
      "label": "Highest temperature the laminate keeps its integrity (Fralock claim)",
      "value": 351,
      "bound": "exact",
      "unit": "degC",
      "scope": "material",
      "conditions": {
        "basis": "Fralock statement of integrity over the range, not a tested rating of one part; the same figure is the glass transition"
      },
      "method": "Features list, as printed in the Fralock flyer",
      "status": "ground",
      "source": "fralock-flyer",
      "where": "Features list, first bullet (\"to 351 C (664 F)\")",
      "source_detail": {
        "title": "Cirlex Engineered Thick All-Polyimide Material, Technical Data Sheet, REV051923",
        "id": "Fralock, file Cirlex-Flyer-Data-Sheet_051923.pdf",
        "url": "https://www.fralock.com/wp-content/uploads/2023/05/Cirlex-Flyer-Data-Sheet_051923.pdf",
        "year": 2023,
        "kind": "datasheet",
        "license": "manufacturer document, linked not reproduced"
      }
    }
  ],
  "corrosion": [
    {
      "environment": "Strong acids and strong oxidizers",
      "headline": "The Kapton safety sheet lists strong acids and strong oxidizers as incompatible with the film, and gives no rate.",
      "effect": "The sheet names strong acids and strong oxidizers as incompatible and gives no test or rate. Fralock describes the laminate as chemically inert but gives no test for it.",
      "rating": "unknown",
      "conditions": {
        "basis": "Kapton FPC, HN and related family sheet, version 2.2 (the H grade is not named on the sheet)"
      },
      "source": "dupont-ais",
      "where": "Incompatibility line, Stability and reactivity section"
    },
    {
      "environment": "Humid air (water uptake)",
      "headline": "Cirlex regains 0.42 % water vapor on the outgassing test, a small uptake.",
      "effect": "The Fralock sheet prints a water vapor regain of 0.42 % under ASTM E595. The sheet does not give a humidity-exposure test, so the rating below is our reading of that single value.",
      "rating": "low",
      "conditions": {
        "standard": "ASTM E595, water vapor regain"
      },
      "source": "fralock-ds",
      "where": "Thermal Property table, row Outgassing Water Vapor Regain"
    },
    {
      "environment": "Heat above the family limit",
      "headline": "The Kapton safety sheet prints \"Temperature > 400 °C\" as a condition to avoid, while Cirlex is rated to 351 degC.",
      "effect": "Two sources give different limits for the film family and for this laminate. The Kapton sheet prints \"Temperature > 400 °C\" as a condition to avoid. The Fralock flyer gives 351 degC as the upper limit of integrity for Cirlex. The laminate limit is the lower of the two.",
      "rating": "moderate",
      "conditions": {
        "basis": "the sources are printed side by side, not reconciled"
      },
      "source": "dupont-ais",
      "where": "Stability and reactivity section, Conditions to avoid line; also fralock-flyer features"
    }
  ],
  "risks": {
    "hazards": [
      {
        "text": "DuPont Kapton article information sheet (family sheet, which covers the film family and does not name Cirlex or the H grade): gives no hazard classification and no hazard statements. It says inhalation and ingestion are not considered potential routes of exposure. It advises washing skin with soap and water. The film is insoluble in water.",
        "ghs": [],
        "source": "dupont-ais",
        "where": "Hazards identification, First aid measures, Physical and chemical properties sections"
      },
      {
        "text": "Fire: the sheet reports the film as self-extinguishing and says it does not burn in air, but the sheet states \"Kapton will burn in an atmosphere of 100% oxygen\" and that it will char. Processing and unwrapping can generate static charge.",
        "ghs": [],
        "source": "dupont-ais",
        "where": "Firefighting measures, Specific hazards during firefighting"
      },
      {
        "text": "GHS for the monomer pyromellitic dianhydride (PMDA), harmonised EU CLP entry 607-098-00-X, not for Cirlex or Kapton itself: H317 May cause an allergic skin reaction; H318 Causes serious eye damage; H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled. Signal word Danger.",
        "ghs": [
          "H317",
          "H318",
          "H334"
        ],
        "source": "pubchem-ghs",
        "where": "GHS Classification, harmonised entry from Regulation (EC) No 1272/2008 (SourceID 607-098-00-X)"
      }
    ],
    "failure_risks": [
      {
        "mode": "Attack by strong acids and strong oxidizers",
        "trigger": "Contact with strong acids or strong oxidizers",
        "consequence": "The film is listed as incompatible with them. No rate of attack is given for the laminate.",
        "severity": "moderate",
        "source": "dupont-ais",
        "where": "Stability and reactivity, Incompatibility line"
      },
      {
        "mode": "Use above the rated temperature",
        "trigger": "Exposure above the Kapton sheet's \"Temperature > 400 °C\" condition to avoid",
        "consequence": "Cirlex is rated to 351 degC in the Fralock flyer, so use above that rating is outside the stated range.",
        "severity": "high",
        "source": "fralock-flyer",
        "where": "Features list (upper temperature of integrity 351 degC); the Kapton sheet condition is in dupont-ais, Stability and reactivity"
      },
      {
        "mode": "Mass loss and condensed volatiles in vacuum",
        "trigger": "Use in vacuum, such as a spacecraft interior or a sealed instrument",
        "consequence": "Total mass loss of 0.5 % and CVCM below 0.01 % under ASTM E595. Condensable volatiles may deposit on nearby optics.",
        "severity": "low",
        "source": "fralock-ds",
        "where": "Thermal Property table, rows Outgassing TML and Outgassing CVCM"
      }
    ],
    "side_effects": [
      {
        "text": "The Fralock data sheet prints an outgassing water vapor regain of 0.42 % under ASTM E595. The sheet does not say that moisture affects the laminate in use.",
        "source": "fralock-ds",
        "where": "Thermal Property table, row Outgassing Water Vapor Regain"
      }
    ],
    "handling": [
      {
        "text": "The Kapton sheet gives the storage temperature as \"20 - 30 °C\" and says \"Keep in a dry place\" for the family. The sheet does not name Cirlex separately.",
        "source": "dupont-ais",
        "where": "Handling and storage, Requirements for storage areas and containers; Storage temperature"
      },
      {
        "text": "Take action to avoid static discharge when unwrapping and processing. Avoid breathing dust. Thick films have sharp edges which can cause cuts.",
        "source": "dupont-ais",
        "where": "Handling and storage, Precautions for safe handling"
      }
    ],
    "mitigations": []
  },
  "uses": [
    {
      "application": "thermal-control",
      "device": "Thermal barriers and thermal shields",
      "example": "The Fralock flyer lists thermal barriers and thermal shields as Cirlex applications, along with sealing shims, lid rings, gasket rings, stand-offs and electrical isolation.",
      "source": "fralock-flyer",
      "where": "Applications list on page 1"
    },
    {
      "application": "electronics-and-chips",
      "device": "Flex and rigid-flex circuits, electrostatic chucks and flexible multizone heaters",
      "example": "The Fralock web page lists flex and rigid-flex circuits, electrostatic chucks and flexible multizone heaters among customer uses of Cirlex, next to encapsulated shims and electrical insulators.",
      "source": "fralock-web",
      "where": "Customer uses list on the Cirlex engineered solutions page"
    },
    {
      "application": "structures",
      "device": "Stand-offs, component stiffeners and washers with adhesive",
      "example": "The Fralock flyer lists stand-offs, component stiffeners, washers with adhesive and gasket rings as Cirlex applications. The flyer does not name a spacecraft or a mission.",
      "source": "fralock-flyer",
      "where": "Applications list on page 1"
    }
  ],
  "supply": [
    {
      "subject": "Cirlex all-polyimide laminate",
      "abundance": "Not read in a fetched page for this product.",
      "producers": [
        {
          "country": "USA",
          "year": 2023
        },
        {
          "country": "USA"
        },
        {
          "country": "USA",
          "year": 2025
        }
      ],
      "critical_lists": [],
      "recycling": "Not sourced.",
      "substitutes": [
        "Fralock names ceramic and Vespel as materials that Cirlex can replace (Fralock generic data sheet, first page)."
      ],
      "source": "fralock-ds",
      "where": "Fralock first page, Material description; Fralock web page for the licensee wording; Wikipedia Kapton for the history and maker"
    }
  ],
  "media": [],
  "documents": [
    {
      "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420 (Fralock)",
      "type": "datasheet",
      "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
      "year": 2020
    },
    {
      "title": "Cirlex Engineered Thick All-Polyimide Material, Technical Data Sheet, REV051923 (Fralock)",
      "type": "datasheet",
      "url": "https://www.fralock.com/wp-content/uploads/2023/05/Cirlex-Flyer-Data-Sheet_051923.pdf",
      "year": 2023
    },
    {
      "title": "DuPont Kapton FPC; HN; HPP-ST; PST; VN; V; GS (0.3 - 2 mil) Article Information Sheet, version 2.2",
      "type": "sds",
      "url": "https://www.boedeker.com/Portals/0/Safety%20Data%20Sheets%20SDS/Kapton-Film-Dupont-Safety-Data-Sheet-SDS-11-30-2016.PDF",
      "year": 2016
    },
    {
      "title": "PubChem GHS Classification, pyromellitic dianhydride (CID 6966)",
      "type": "database",
      "url": "https://pubchem.ncbi.nlm.nih.gov/compound/6966",
      "year": 2026
    }
  ],
  "gaps": [
    "Grade of the Kapton film: the Fralock sheets say Cirlex is made from \"100% DuPont Kapton adhesiveless polyimide film\" and print no grade letter, so the Kapton grade is not known and the properties cannot be assigned to H, HN or any other grade.",
    "Atomic oxygen erosion of Cirlex was not read in any source this run. The H-grade film result is in profile pi-kapton-h and is not a Cirlex result.",
    "Radiation (proton, electron, UV) tolerance for Cirlex was not found in any source this run.",
    "Thermal cycling endurance and cryogenic mechanical results beyond the -269 degC integrity claim were not found in any source this run.",
    "Spacecraft flight heritage: the lane brief names spacecraft thermal breaks, shims and isolators, but the Fralock pages read this run name aerospace, not a spacecraft or mission. No flight use of Cirlex was found.",
    "Dissipation factor: the Fralock table prints 0.0040 with ASTM D150 but no test frequency, so the frequency is not stated.",
    "Specific gravity is recorded as specific_gravity with unit \"-\" because the sheet prints no density in g/cm3. specific_gravity and ultimate_compressive_strength are not in spores/property-canon.yaml, so they are short snake_case names.",
    "Typical values only: the Fralock data sheet says \"The above values are averaged values and should not be used in writing specifications.\" No minimum or specification values were found.",
    "Flammability: the Fralock web page and flyer state \"UL94V-0\" with a UL file number. This is a pass listing, not a numeric property, so it is not recorded as a property.",
    "Surface roughness \"Ra 32 µin\" is in the Fralock sheet but is not recorded as a property.",
    "Supply: no producer share by country, production volume, feedstock abundance or critical-mineral list was found for Cirlex or its monomers. The Fralock pages name Valencia, California as the head office. Wikipedia names Qnity Electronics as the current maker of Kapton, and this is not confirmed on a Cirlex page.",
    "Name of the diamine: the Wikipedia Kapton article prints \"4,4'-oxydiphenylamine (ODA)\", while the ODA infobox names the compound 4,4'-Oxydianiline. The recipe uses the infobox name."
  ],
  "story": {
    "why": "Cirlex is a thick all-polyimide laminate made by Fralock from DuPont Kapton film, without adhesive. Its Tg is 351 degC and its thermal conductivity is 0.17 W/m K, which is why Fralock sells it for thermal barriers and shims. Fralock's statement that it is used in aerospace is the only aerospace link in the sources read this run.",
    "uses": [
      {
        "where": "Thermal barriers and shields",
        "line": "The Fralock flyer lists thermal barriers and thermal shields as the first applications of Cirlex."
      },
      {
        "where": "Electrical isolation and flexible electronics",
        "line": "The Fralock web page lists flex circuits, electrostatic chucks and flexible multizone heaters as customer uses, next to electrical insulators."
      }
    ],
    "can_do": [
      {
        "label": "High-temperature stiffness",
        "line": "Fralock typical tensile modulus at 200 degC is 402 kpsi, with a glass transition temperature of 351 degC.",
        "scope": "material",
        "value": "402 kpsi at 200 degC"
      },
      {
        "label": "Electrical insulation",
        "line": "Fralock typical dielectric strength is 2790 V/mil, and the dielectric constant is 3.45 at 10 kHz.",
        "scope": "material",
        "value": "2790 V/mil"
      },
      {
        "label": "Heat flow",
        "line": "Fralock typical thermal conductivity is 0.17 W/m K, which the sheet presents as low.",
        "scope": "material",
        "value": "0.17 W/m K"
      }
    ],
    "compare": "Cirlex is the thick, adhesive-free form of the Kapton chemistry. Fralock's typical data give a Tg of 351 degC, an in-plane CTE of 30 µm/m °C from 23 to 350 degC, and a through-thickness CTE of 118 µm/m °C, so the material expands much more through its thickness than in its plane. The Kapton film profiles in this database cover thin film, not thick laminate, so their outgassing and erosion numbers do not transfer to Cirlex without a test on the Cirlex grade.",
    "compare_rows": [
      {
        "label": "Glass transition temperature",
        "benchmark": "glass_transition_temperature",
        "scope": "material"
      },
      {
        "label": "Thermal conductivity",
        "benchmark": "thermal_conductivity",
        "scope": "material"
      },
      {
        "label": "Total mass loss (outgassing TML)",
        "benchmark": "total_mass_loss",
        "scope": "material"
      }
    ],
    "handling": [
      "Keep the film dry, away from strong acids and strong oxidizers, at the storage temperature the Kapton sheet gives as \"20 - 30 °C\".",
      "Avoid static discharge when unwrapping and processing, and avoid breathing dust.",
      "Thick films have sharp edges which can cause cuts (DuPont Kapton sheet, handling section)."
    ],
    "good_for": [
      "Thermal barriers and thermal shields where an adhesive-free all-polyimide part is wanted (Fralock flyer applications list).",
      "Electrical isolation and standoffs, with a dielectric strength of 2790 V/mil and a dielectric constant of 3.45 at 10 kHz.",
      "Parts that must keep their stiffness at high temperature, with a tensile modulus of 402 kpsi at 200 degC."
    ],
    "watch_out": [
      "Outgassing in vacuum. The total mass loss is 0.5 % under ASTM E595, which the sheet reports without a bake-out procedure.",
      "Strong acids and strong oxidizers, which the Kapton sheet lists as incompatible.",
      "The Fralock values are typical averages and are not specification values. The 351 degC upper limit is a Fralock claim, not a rated limit for each part.",
      "Atomic oxygen, radiation and thermal cycling for Cirlex were not found in any source read this run."
    ],
    "verdict": "Cirlex is a thick, adhesive-free all-polyimide laminate from Fralock, with a glass transition temperature of 351 degC and a thermal conductivity of 0.17 W/m K. It suits thermal barriers, shims and electrical isolation where those numbers matter. For flight use, check outgassing (0.5 % total mass loss) and do not rely on typical values for specification.",
    "recipe": {
      "line": "Cirlex is made from DuPont Kapton adhesiveless polyimide film, using Fralock's Adhesiveless Lamination Technology to form a monolithic all-polyimide part. The Kapton chemistry is the condensation of pyromellitic dianhydride with an oxydianiline, followed by a thermal ring closure, per the Wikipedia Kapton article.",
      "parts": [
        {
          "name": "Pyromellitic dianhydride",
          "symbol": "PMDA",
          "role": "Dianhydride monomer of the Kapton film, per Wikipedia Kapton article.",
          "share_note": "Molar mass 218.120 g/mol, Wikipedia infobox (CAS 89-32-7)"
        },
        {
          "name": "4,4'-Oxydianiline",
          "symbol": "ODA",
          "role": "Diamine monomer of the Kapton film, per Wikipedia Kapton article.",
          "share_note": "Molar mass 200.24 g/mol, Wikipedia infobox (CAS 101-80-4); the Kapton article prints the name as oxydiphenylamine"
        }
      ]
    },
    "risk_groups": [
      {
        "title": "For people",
        "lead": "The DuPont family sheet gives no hazard classification for the film. Thick laminate can cut, and unwrapping can build up static.",
        "points": [
          {
            "label": "The laminate",
            "line": "The Kapton family sheet lists no hazard classification and says inhalation and ingestion are not considered routes of exposure. Thick films have sharp edges that can cut."
          },
          {
            "label": "Fire",
            "line": "The sheet says the film does not burn in air but will burn in 100% oxygen."
          },
          {
            "label": "Static",
            "line": "Processing and unwrapping can generate static charge, so the sheet advises avoiding static discharge."
          }
        ],
        "level": 1,
        "verdict": "No hazard classification on the family sheet"
      },
      {
        "title": "If it fails",
        "lead": "The failure modes come from the datasheet limits and the incompatibility list, not from tests on finished hardware.",
        "points": [
          {
            "label": "Temperature",
            "line": "The Kapton sheet prints \"Temperature > 400 °C\" as a condition to avoid, and Cirlex is rated to 351 degC in the Fralock flyer."
          },
          {
            "label": "Chemicals",
            "line": "Strong acids and strong oxidizers are listed as incompatible, with no rate of attack given."
          },
          {
            "label": "Vacuum",
            "line": "The laminate loses 0.5 % of its mass in the ASTM E595 test, so it can add volatiles in a sealed vacuum volume."
          }
        ]
      },
      {
        "title": "Handling and storage",
        "points": [
          {
            "label": "Storage",
            "line": "Keep the film dry, away from strong acids and strong oxidizers. The Kapton sheet gives the storage temperature as \"20 - 30 °C\"."
          },
          {
            "label": "Static",
            "line": "Avoid static discharge when unwrapping, and avoid breathing dust."
          }
        ]
      }
    ]
  },
  "updated": "2026-11-01",
  "review": {
    "status": "draft",
    "method": "assistant",
    "checked_values": 30,
    "unreachable": 0,
    "caveats": 3,
    "note": "Written by an AI assistant on 2026-11-01. Values were read in this run from the Fralock generic data sheet (Rev_042420), the Fralock flyer (REV051923), the Fralock product page, the DuPont Kapton article information sheet, and Wikipedia and PubChem pages. The Fralock figures are typical averages, not specification values."
  },
  "sources": {
    "fralock-ds": {
      "title": "Cirlex Polyimide Technical Data Sheet, generic, Rev_042420",
      "id": "Fralock, Valencia CA, file Cirlex-DataSheet_Generic-042520.pdf (uploaded 2021-07)",
      "url": "https://www.fralock.com/wp-content/uploads/2021/07/Cirlex-DataSheet_Generic-042520.pdf",
      "year": 2020,
      "kind": "datasheet",
      "license": "manufacturer document, linked not reproduced"
    },
    "fralock-flyer": {
      "title": "Cirlex Engineered Thick All-Polyimide Material, Technical Data Sheet, REV051923",
      "id": "Fralock, file Cirlex-Flyer-Data-Sheet_051923.pdf",
      "url": "https://www.fralock.com/wp-content/uploads/2023/05/Cirlex-Flyer-Data-Sheet_051923.pdf",
      "year": 2023,
      "kind": "datasheet",
      "license": "manufacturer document, linked not reproduced"
    },
    "fralock-web": {
      "title": "Cirlex Engineered Solutions, Polyimide Lamination Manufacturer (Fralock)",
      "url": "https://www.fralock.com/engineered-solutions/cirlex/index.html",
      "kind": "web",
      "license": "manufacturer web page, linked not reproduced"
    },
    "dupont-ais": {
      "title": "DuPont Article Information Sheet: Kapton FPC; HN; HPP-ST; PST; VN; V; GS (0.3 - 2 mil), version 2.2",
      "id": "Ref. 150000003827, revision date 11/30/2016",
      "url": "https://www.boedeker.com/Portals/0/Safety%20Data%20Sheets%20SDS/Kapton-Film-Dupont-Safety-Data-Sheet-SDS-11-30-2016.PDF",
      "year": 2016,
      "kind": "datasheet",
      "license": "manufacturer document, linked not reproduced"
    },
    "wiki-kapton": {
      "title": "Wikipedia, Kapton",
      "url": "https://en.wikipedia.org/wiki/Kapton",
      "kind": "web",
      "license": "CC BY-SA (Wikipedia)"
    },
    "wiki-pmda": {
      "title": "Wikipedia, Pyromellitic dianhydride (infobox)",
      "url": "https://en.wikipedia.org/wiki/Pyromellitic_dianhydride",
      "kind": "web",
      "license": "CC BY-SA (Wikipedia)"
    },
    "wiki-oda": {
      "title": "Wikipedia, 4,4'-Oxydianiline (infobox)",
      "url": "https://en.wikipedia.org/wiki/4,4%27-Oxydianiline",
      "kind": "web",
      "license": "CC BY-SA (Wikipedia)"
    },
    "pubchem-ghs": {
      "title": "PubChem GHS Classification, pyromellitic dianhydride (CID 6966), harmonised EU CLP entry 607-098-00-X",
      "url": "https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/6966/JSON",
      "year": 2026,
      "kind": "database",
      "license": "PubChem (NCBI, public domain); the CLP entry is EU law, CC BY 4.0"
    }
  },
  "license": "CC-BY-4.0",
  "url": "https://spacemushroom.com/profiles/cirlex-polyimide/"
}