Polyethylene naphthalate (PEN), biaxially oriented film and engineering resin PEN
(C14H10O4)n, repeat unit C14H10O4 (poly(ethylene 2,6-naphthalate), from naphthalene-2,6-dicarboxylic acid and ethylene glycol) · CAS 24968-11-4
Also known as Teonex, TN8050SC
PEN is a polyester made from naphthalene-2,6-dicarboxylic acid (or its dimethyl ester) and ethylene glycol.
Evidence level
2 of 5
Lab-measured
- 0Predicted only. No one has made it, or no measurement exists.
- 1Calculated. Only calculated or predicted values from sources.
- 2Lab-measured. Measured properties with their conditions stated.
- 3Space-relevant tests. Measured in conditions relevant to space, such as vacuum or atomic oxygen.
- 4Ground-qualified. Qualified for an application on the ground.
- 5Flown or field-proven. Flight or field results exist.
Heat
155 °C
Strength
200 MPa
Stiffness
5 GPa
Dielectric
160 kV/mm
Recipe, share of the weight
- C not statedCarbon
- H not statedHydrogen
- O not statedOxygen
Best for
Thin, stiff, heat-tolerant electrical film, where PET runs out of temperature margin (motor slot insulation, flexible substrates)
Weakest at
Little published ageing data: no flight atomic-oxygen value and no quantitative humidity or UV result was found in the sources checked
Risk at a glance
- People None found. Not classified hazardous under OSHA criteria
- If it fails Moderate. Hydrolytic and thermal ageing in hot, humid conditions
- Corrosion Moderate. The Goodfellow data sheet rates UV resistance as Fair; no quantitative UV test was found.
Quick facts: PEN
| Property | Value | Basis |
|---|---|---|
| Density | 1.33 to 1.36 g/cm³ | 2 sourced values across conditions |
| Yield strength | 80 MPa | 1 sourced value |
| Tensile strength | 200 to 300 MPa | 3 sourced values across conditions |
| Young's modulus | 2.2 to 5.5 GPa | 2 sourced values across conditions |
| Thermal conductivity | 0.15 W/(m·K) | 1 sourced value |
| Thermal expansion (CTE) | 20 to 21 ppm/K | 1 sourced value |
| Melting point | 262 to 275 °C | 2 sourced values across conditions |
| Maximum service temperature | 155 to 180 °C | 2 sourced values across conditions |
What is the density of Polyethylene naphthalate (PEN), biaxially oriented film?
Polyethylene naphthalate (PEN), biaxially oriented film has a density of 1.33 to 1.36 g/cm³. The range covers 2 sourced values across the tempers, forms and test conditions the sources report; room-temperature values are used where a source states a temperature.
What is the thermal conductivity of Polyethylene naphthalate (PEN), biaxially oriented film?
Polyethylene naphthalate (PEN), biaxially oriented film has a thermal conductivity of 0.15 W/(m·K). The source and test conditions are listed in the properties table on this page.
What is the coefficient of thermal expansion of Polyethylene naphthalate (PEN), biaxially oriented film?
Polyethylene naphthalate (PEN), biaxially oriented film has a coefficient of thermal expansion of 20 to 21 ppm/K. The source and test conditions are listed in the properties table on this page.
What is the melting point of Polyethylene naphthalate (PEN), biaxially oriented film?
Polyethylene naphthalate (PEN), biaxially oriented film has a melting point of 262 to 275 °C. The range covers 2 sourced values across the tempers, forms and test conditions the sources report; room-temperature values are used where a source states a temperature.
What is the yield strength of Polyethylene naphthalate (PEN), biaxially oriented film?
Polyethylene naphthalate (PEN), biaxially oriented film has a yield strength of 80 MPa. The source and test conditions are listed in the properties table on this page.
What are the other names and codes for Polyethylene naphthalate (PEN), biaxially oriented film?
Polyethylene naphthalate (PEN), biaxially oriented film is also written as Teonex, TN8050SC. Each code is printed in the source listed beside it in the designations table.
What is Polyethylene naphthalate (PEN), biaxially oriented film used for?
Uses recorded in the sources include Slot, phase and wedge insulation in electric motors (Teonex Q 51 and Q5100); Substrate for flexible integrated circuits.
Why it exists
Polyethylene naphthalate (PEN) is a polyester film and resin. It is the naphthalene analogue of PET, and the extra ring gives improved thermal properties, as Indorama says. The electrical grade Teonex Q 51 is rated for 160/180 °C in UL 746B service, and Mueller-Ahlhorn says Teonex has better properties than PET-polyester films, including temperature resistance. Its weakness is that its ageing behaviour is less studied than PET's, and no atomic-oxygen flight data were found.
Where it's used
Electric motors
Mueller-Ahlhorn says Teonex Q 51 was specially designed for slot and phase insulation and slot closure in electro motors with increased stress. SynFlex says Teonex Q5100 is for slot insulation, phase insulation and wedges.
Flexible electronics
Wikipedia says PEN is a substrate for flexible integrated circuits and is positioned as a replacement for PET.
Recipe
(C14H10O4)n, repeat unit C14H10O4 (poly(ethylene 2,6-naphthalate), from naphthalene-2,6-dicarboxylic acid and ethylene glycol)
PEN is a polyester made by joining naphthalene-2,6-dicarboxylic acid (or its dimethyl ester) with ethylene glycol through ester links. Each repeat unit (C14H10O4) has a naphthalene ring where PET has a benzene ring, and that larger aromatic ring stiffens the chain. Indorama describes PEN as analogous to PET but with improved thermal, barrier and UV properties.
| Ingredient | Share of the weight | What it does |
|---|---|---|
| Carbon C | not stated | Ten carbons in the naphthalene ring, two in the carboxyl groups and two in the ethylene linker. |
| Hydrogen H | not stated | Six on the naphthalene ring and four on the ethylene linker. |
| Oxygen O | not stated | Two ester groups, each with a carbonyl oxygen and an ether oxygen. |
Weight shares are as printed in the sources.
What it can do
Heat
155 °C
measured
The electrical grade Teonex Q 51 is rated for a continuous working temperature of 160/180 °C under UL 746B. The granule sheet gives an upper working temperature of 155 °C.
Strength
200 MPa
measured
Biaxial PEN film has a tensile strength of 200 MPa. Teonex Q5100 at 50 micron has 290 MPa longitudinal and 300 MPa transversal.
Stiffness
5 GPa
measured
The TN8050SC resin grade has a tensile modulus of 2200 MPa (ISO 527). Biaxial film has 5 to 5.5 GPa.
Dielectric
160 kV/mm
measured
Teonex Q 51 lists a dielectric strength of 250 kV/mm (JIS C-2318), and the biaxial film lists 160 kV/mm at 0.075 mm.
How it compares
Mueller-Ahlhorn says Teonex has better properties than PET-polyester films, including temperature resistance. The arXiv measurement gives a primary glass transition of 387 K (114 °C) for quenched PEN sheet, and the DSC melting point is 269 °C for the electrical grade. The continuous working temperature of 160/180 °C is the rating to compare with other electrical films. The compare table below sets PEN against the benchmarks it has values for.
The same measurements for each material, so you can compare them. Each row names the key condition under the value; the full conditions and methods are in the numbered notes under Technical details. Other materials are shown beside it; each was measured under its own conditions, so open its page before comparing closely. Compare every grade in the family.
| Measurement | PEN | LCP | PBT | PET | PHB | PLA |
|---|---|---|---|---|---|---|
| Thermal behavior and safety | ||||||
| Melting point, Teonex Q 51 electrical film | 269 °C4 | 280 to 350 °C | 223 °C | 254 °C | 151.2 °C | 165 °C |
| Melting point range, PEN resin sales specification | 262 °C5 | 280 to 350 °C | 223 °C | 254 °C | 151.2 °C | 165 °C |
| Deflection temperature under load at 1.80 MPa, PEN resin grade TN8050SCValue printed in the TN8050SC property table | 91 °C10 | 220 °C | 165 °C | no data | no data | 80 °C |
| Deflection temperature under load at 0.45 MPa, PEN resin grade TN8050SCValue printed in the TN8050SC property table | 105 °C11 | 220 °C | 165 °C | no data | no data | 80 °C |
| Thermal conductivity, biaxial PEN film at 23 °CValue printed in the Thermal Properties table | 0.15 W m-1 K-1 | 0.18 W/(m·K) | 0.27 W/(m K) | 3.7×10^-4 cal cm/(cm² s °C) | no data | no data |
| Physical and electrical | ||||||
| Density, biaxially oriented PEN film (Goodfellow data sheet) | 1.36 g/cm³1 | 1.4 g/cm³ | 1300 kg/m³ | 1.39 g/cm³ | 1.23 g/cm³ | 1.24 g/cc |
| Density, PEN resin grade TN8050SC | 1.33 g/cm³2 | 1.4 g/cm³ | 1300 kg/m³ | 1.39 g/cm³ | 1.23 g/cm³ | 1.24 g/cc |
| Temperature behavior | ||||||
| Glass transition temperature (primary alpha relaxation), quenched PEN sheet | 387 K3 | no data | 60 °C | 76 °C | 2.4 °C | 55 °C |
| Other measurements | ||||||
| Tensile strength, biaxial PEN film (Goodfellow data sheet)Value printed in the Mechanical Properties table | 200 MPa6 | 55 to 165 MPa | no data | 190 MPa | 34.2 MPa | 50 MPa |
| Tensile strength, Teonex Q5100 film 50 micron, longitudinal | 290 MPa7 | 55 to 165 MPa | no data | 190 MPa | 34.2 MPa | 50 MPa |
| Tensile strength, Teonex Q5100 film 50 micron, transversalValue printed in the same Mechanical table | 300 MPa8 | 55 to 165 MPa | no data | 190 MPa | 34.2 MPa | 50 MPa |
| Elongation at break, biaxial PEN film (Goodfellow data sheet)Value printed in the Mechanical Properties table | 60 % | 3 % | 50 % | 140 % | 3.8 % | 3.31 % |
| Elongation at break, Teonex Q5100 film 50 micron, longitudinal | 120 %9 | 3 % | 50 % | 140 % | 3.8 % | 3.31 % |
| Tensile strain at break, PEN resin grade TN8050SC (ISO 527)Value printed in the TN8050SC property table | 15 % | 3 % | 50 % | 140 % | 3.8 % | 3.31 % |
| Tensile modulus, biaxial PEN film (Goodfellow data sheet)Range printed in the Mechanical Properties table | 5 GPa | no data | 2400 MPa | 3800 MPa | 3300 MPa | 2315 MPa |
| Tensile modulus, PEN resin grade TN8050SC (ISO 527)Value printed in the TN8050SC property table | 2200 MPa | no data | 2400 MPa | 3800 MPa | 3300 MPa | 2315 MPa |
| Flexural modulus, PEN resin grade TN8050SC (ISO 178)Value printed in the TN8050SC property table | 2250 MPa | no data | 2400 MPa | no data | no data | 3600 MPa |
| Bending strength, PEN resin grade TN8050SC (ISO 178)Value printed in the TN8050SC property table | 99 MPa | no data | 85 MPa | no data | no data | 108 MPa |
| Tensile yield stress, PEN resin grade TN8050SC (ISO 527)Value printed in the TN8050SC property table | 80 MPa | no data | 55 MPa | no data | no data | 51 MPa |
| Coefficient of thermal expansion, biaxial PEN film | 20 x10-6 K-112 | -80 ppm/K | 115 E-6/K | 1.7×10^-5 in/in/°C | no data | no data |
| Upper working temperature, PEN film (Goodfellow data sheet)Value printed in the Thermal Properties table | 155 °C | 200 to 220 °C | 200 °C | 150 °C | no data | no data |
| Continuous working temperature, Teonex Q 51 electrical film (UL 746B) | 160 °C13 | 200 to 220 °C | 200 °C | 150 °C | no data | no data |
| Dielectric constant, biaxial PEN filmValue printed in the Electrical Properties table | 3.2 - | 3.1 - | 3.3 dimensionless | no data | no data | no data |
| Dielectric strength, biaxial PEN filmValue printed in the Electrical Properties table | 160 kV/mm | 47 kV/mm | 36 kV/mm | 7.7 kV | no data | no data |
| Dielectric strength, Teonex Q 51 electrical film (JIS C-2318)Value printed in the technical data table | 250 kV/mm | 47 kV/mm | 36 kV/mm | 7.7 kV | no data | no data |
| Water absorption, biaxial PEN filmValue printed in the Physical Properties table | 0.4 % | 0.03 % | 0.25 % | no data | no data | no data |
| Water absorption, Teonex Q 51 electrical film (TDF method)Value printed in the technical data table | 0.3 % | 0.03 % | 0.25 % | no data | no data | no data |
Why choose it, and why not
Good for
- Motor slot and phase insulation, where the 160/180 °C rating and 250 kV/mm dielectric strength are used.
- Flexible electronics substrates, where a higher glass transition than PET is wanted (Wikipedia).
Watch out for
- Ageing data are thin. No atomic-oxygen flight value, and no quantitative humidity or UV result, was found.
- The shrinkage at 200 °C (0.8 % at 50 micron) means that hot processing needs control.
- Trademark owners differ between the sources (DuPont, TOYOBO and Teijin), so check the grade and its data sheet.
PEN is a heat-tolerant polyester film with a 160/180 °C electrical rating. It is a sound choice for motor insulation and flexible substrates, but its behaviour in vacuum, UV and humidity needs a grade-specific test before flight use.
Technical details
For scientists and researchers. Everything above comes from the record below: every number with its method, its conditions and its source.
Other names and standards
The same grade under other systems, as datasheets and standards print them. Each code was checked against the page it comes from.
| System | Codes |
|---|---|
| Trade name | Teonex, TN8050SC |
Notes
The method, full conditions and any caveat for the numbered rows above.
| # | Measurement | Method | Conditions | Caveat |
|---|---|---|---|---|
| 1 | Density, biaxially oriented PEN film (Goodfellow data sheet) | Value printed in the Physical Properties table of the Goodfellow data sheet | form biax filmnote film properties as printed on the PEN granule data sheet | — |
| 2 | Density, PEN resin grade TN8050SC | Value printed in the TN8050SC property table (ISO 1183) | test ISO 1183grade TN8050SCnote processing form not stated on the page | — |
| 3 | Glass transition temperature (primary alpha relaxation), quenched PEN sheet | Primary glass transition read from the Cp jump, printed as Tg=387 K; a secondary relaxation at about 305 K is not used here | method modulated DSC at 2 K/minsample PEN from molten Goodfellow pellets, quenched to a 0.5 mm sheetnote printed in kelvin; the importer converts to 114 °C | — |
| 4 | Melting point, Teonex Q 51 electrical film | Value printed in the technical data table of the Mueller-Ahlhorn data sheet | method DSCproduct Teonex Q 51 FI 14090 film | — |
| 5 | Melting point range, PEN resin sales specification | Range printed in Table 1 of the Indorama sales specification | method DSCproduct PEN pellets, sales specification | — |
| 6 | Tensile strength, biaxial PEN film (Goodfellow data sheet) | — | form biax filmthickness not statedtest not stated | — |
| 7 | Tensile strength, Teonex Q5100 film 50 micron, longitudinal | Value printed in the Mechanical table of the SynFlex data sheet (updated 06/24) | thickness 50 microndirection longitudinalform biaxially oriented film | — |
| 8 | Tensile strength, Teonex Q5100 film 50 micron, transversal | — | thickness 50 microndirection transversalform biaxially oriented film | — |
| 9 | Elongation at break, Teonex Q5100 film 50 micron, longitudinal | Value printed in the Mechanical table of the SynFlex data sheet | thickness 50 microndirection longitudinal | — |
| 10 | Deflection temperature under load at 1.80 MPa, PEN resin grade TN8050SC | — | test ISO 75-1,2load 1.80 MPagrade TN8050SC | — |
| 11 | Deflection temperature under load at 0.45 MPa, PEN resin grade TN8050SC | — | test ISO 75-1,2load 0.45 MPagrade TN8050SC | — |
| 12 | Coefficient of thermal expansion, biaxial PEN film | Range printed in the Thermal Properties table, printed as 20-21 x10^-6 K^-1 | form biax film | — |
| 13 | Continuous working temperature, Teonex Q 51 electrical film (UL 746B) | Range printed in the technical data table of the Mueller-Ahlhorn data sheet | standard UL 746Bnote printed as 160/180; the data sheet gives an electrical RTI of 180 °C and a mechanical RTI of 160 °C | — |
Corrosion and compatibility
What happens when it meets other materials and environments.
| Environment | Concern | What happens |
|---|---|---|
| Ultraviolet light | moderate | The Goodfellow data sheet rates UV resistance as Fair; no quantitative UV test was found.1 |
| Hot humid conditions (hydrolysis and thermal ageing) | moderate | Ageing at 140 to 190 °C in dry and wet air and nitrogen degrades PEN to a different extent from PET.2 |
| Continuous heat in air | moderate | Continuous working temperature is 160/180 °C (UL 746B) for the electrical grade, and the upper working limit is 155 °C on the granule sheet.3 |
| Heat during processing (dimensional stability) | low | Shrinkage after 30 min at 150 °C is 0.4 % longitudinal, rising to 0.8 % at 200 °C, for 50 micron film.4 |
| Moisture uptake | low | Water absorption is 0.3 % to 0.4 % for the films.5 |
| Chemical exposure | low | Good resistance to dilute acids, alcohols, alkalis, aromatic hydrocarbons, greases and oils, halogenated hydrocarbons and ketones.6 |
| # | Environment | Details | Test conditions |
|---|---|---|---|
| 1 | Ultraviolet light | The sales specification says PEN has better UV-penetration barrier properties than PET, but it gives no number. Weathering under sunlight is not quantified in the sources checked. | test qualitative rating, no unit given |
| 2 | Hot humid conditions (hydrolysis and thermal ageing) | The paper says PEN is thought to have increased thermal and hydrolytic resistance compared with PET, but few studies had examined PEN degradation. The abstract gives no numbers for the extent of loss; the full data were not readable. | temperature 140 to 190 °Catmospheres dry nitrogen, dry air, wet nitrogen, wet air |
| 3 | Continuous heat in air | The data sheets give service limits only. Above them the film is not rated, and no strength loss at higher temperature was found in the sources checked. | standard UL 746Bfilm Teonex Q 51 |
| 4 | Heat during processing (dimensional stability) | Film shrinks when heated because it relaxes strain from manufacture. Shrinkage is small at 150 °C, and the 200 °C figure is about twice as large. | thickness 50 microndirection longitudinaltests 30 min at 150 °C; at 200 °C |
| 5 | Moisture uptake | Low uptake limits the water available for hydrolysis, but the ageing abstract still lists hydrolysis as a risk at elevated temperature. | test TDF method (Mueller), printed as water absorption (Goodfellow) |
| 6 | Chemical exposure | Concentrated acids are rated Good to Poor. The ratings are qualitative and have no units. | basis qualitative chemical resistance table |
Risks and side effects
Hazards to people, what happens when a cell overheats, and how the material is handled and stored.
For people
The PEN sales specification says no hazard label is needed under OSHA criteria. No GHS record for PEN was found in the sources checked.
- The resin
- Indorama's sales specification says no hazard warning is required on the label under OSHA criteria, and that the DOT shipping name is not regulated.
- The film
- The Goodfellow data sheet rates the 0.075 mm film VTM-2 under UL 94, a thin-material vertical burn class.
- Monomers
- The sales specification says the monomers are EU REACH registered. Their hazard data were not found in the sources checked.
If it overheats
The data sheets give the service limits. Above them the film is not rated.
- Service limit
- The Mueller-Ahlhorn sheet gives a continuous working temperature of 160/180 °C (UL 746B) for Teonex Q 51. The Goodfellow sheet gives an upper working temperature of 155 °C.
- Shrinkage
- The SynFlex sheet gives 0.4 % longitudinal shrinkage after 30 min at 150 °C, and 0.8 % at 200 °C, for 50 micron film.
Handling and storage
- Moisture
- Water absorption is 0.3 % to 0.4 %. The ageing paper says PEN is thought to resist hydrolysis better than PET, but it gives no loss figures for hot, humid exposure.
- Packing
- Pellets are sold in 1000 kg fabric bags or 100 kg fibre drums.
Test details
The original wording and numbers from the sources, for readers who want them.
Failure risks
| Failure | Trigger and consequence |
|---|---|
| Hydrolytic and thermal ageing in hot, humid conditionsmoderate severity | Ageing at 140 to 190 °C in wet air or wet nitrogenThe extent of degradation differs from PET, and the mechanism changes with temperature. The abstract gives no loss figures. |
| Shrinkage of the film when heatedlow severity | 30 min at 150 °C, or 200 °C0.4 % shrinkage longitudinal at 150 °C and 0.8 % at 200 °C for 50 micron film. |
Handling and storage
- Obtain the current safety data sheet for the grade before use. The Indorama sheet says a customer should consult the SDS before using any material.
- Pellets are shipped in 1000 kg polypropylene fabric bags or 100 kg fibre drums, and four drums can go on one pallet.
Mitigations
- Specify the grade by its continuous working temperature. For Teonex Q 51 this is 160/180 °C (UL 746B), which is the rated figure rather than the 155 °C upper working temperature on the granule sheet.
Supply and geography
How common the raw materials are and where they come from.
Naphthalene-2,6-dicarboxylic acid (NDC or PNDA) and ethylene glycol, the monomers
Indorama says PEN is made from ethylene glycol and either NDC or PNDA, and that its monomers are EU REACH registered. No abundance or feedstock figure was found in the sources checked.
- Recycling
- No source found in the sources checked.
Documents
Datasheets, safety data sheets, papers and standards you can open.
Full record
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spore: profile
id: pen
spore_version: 0.2
family: polyesters
name: Polyethylene naphthalate (PEN), biaxially oriented film and engineering resin
abbreviation: PEN
role: Polyester film for motor slot and phase insulation, and a higher-temperature alternative to PET film
category: polymers
type: polyesters
summary: |
PEN is a polyester made from naphthalene-2,6-dicarboxylic acid (or its dimethyl ester) and ethylene glycol. It is the naphthalene analogue of PET, and Indorama describes its thermal, barrier and UV properties as improved over PET. Biaxially oriented PEN film, sold as Teonex, has a density of 1.36 g/cm3 and a tensile strength of 200 MPa. The electrical grade Teonex Q 51 lists a melting point of 269 °C (DSC) and a continuous working temperature of 160/180 °C under UL 746B. No atomic-oxygen flight value for PEN was found in the sources checked for this profile.
best_for: Thin, stiff, heat-tolerant electrical film, where PET runs out of temperature margin (motor slot insulation, flexible substrates)
weakest_at: 'Little published ageing data: no flight atomic-oxygen value and no quantitative humidity or UV result was found in the sources checked'
identity:
formula: (C14H10O4)n, repeat unit C14H10O4 (poly(ethylene 2,6-naphthalate), from naphthalene-2,6-dicarboxylic acid and ethylene glycol)
cas: 24968-11-4
source: indorama-pen-spec
where: Title line, CAS 24968-11-4 / 25853-85-4. Repeat-unit formula from the Wikipedia infobox (source wikipedia-pen, Properties section)
designations:
- system: Trade name
code: Teonex
source: synflex-q5100
where: Title and footer, 'Teonex is a registered trademark of TOYOBO'
- system: Trade name
code: TN8050SC
source: plabase-tn8050sc
where: Grade name in the property table header
tags:
environments: []
stresses:
- uv
- hydrolysis
applications:
- electronics-and-chips
properties:
- benchmark: density
label: Density, biaxially oriented PEN film (Goodfellow data sheet)
value: 1.36
unit: g/cm3
scope: material
conditions:
form: biax film
note: film properties as printed on the PEN granule data sheet
method: Value printed in the Physical Properties table of the Goodfellow data sheet
status: ground
source: goodfellow-pen-tds
where: Physical Properties table, Density row
- benchmark: density
label: Density, PEN resin grade TN8050SC
value: 1.33
unit: g/cm3
scope: material
conditions:
test: ISO 1183
grade: TN8050SC
note: processing form not stated on the page
method: Value printed in the TN8050SC property table (ISO 1183)
status: ground
source: plabase-tn8050sc
where: Basic section, Density row
- benchmark: glass_transition_temperature
label: Glass transition temperature (primary alpha relaxation), quenched PEN sheet
value: 387
unit: K
scope: material
conditions:
method: modulated DSC at 2 K/min
sample: PEN from molten Goodfellow pellets, quenched to a 0.5 mm sheet
note: printed in kelvin; the importer converts to 114 degC
method: Primary glass transition read from the Cp jump, printed as Tg=387 K; a secondary relaxation at about 305 K is not used here
status: ground
source: arxiv-pen-mdsc
where: Results, text on the MDSC heat flow and reversing Cp (Fig. 3)
- benchmark: melting_point
label: Melting point, Teonex Q 51 electrical film
value: 269
unit: °C
scope: material
conditions:
method: DSC
product: Teonex Q 51 FI 14090 film
method: Value printed in the technical data table of the Mueller-Ahlhorn data sheet
status: ground
source: mueller-q51-fi
where: Technical data table, Melting temperature row
- benchmark: melting_point
label: Melting point range, PEN resin sales specification
value: 262
value_high: 275
unit: °C
scope: material
conditions:
method: DSC
product: PEN pellets, sales specification
method: Range printed in Table 1 of the Indorama sales specification
status: ground
source: indorama-pen-spec
where: Table 1, Melting Point row
- benchmark: ultimate_tensile_strength
label: Tensile strength, biaxial PEN film (Goodfellow data sheet)
value: 200
unit: MPa
scope: material
conditions:
form: biax film
thickness: not stated
test: not stated
method: Value printed in the Mechanical Properties table
status: ground
source: goodfellow-pen-tds
where: Mechanical Properties table, Tensile strength row
- benchmark: ultimate_tensile_strength
label: Tensile strength, Teonex Q5100 film 50 micron, longitudinal
value: 290
unit: MPa
scope: material
conditions:
thickness: 50 micron
direction: longitudinal
form: biaxially oriented film
method: Value printed in the Mechanical table of the SynFlex data sheet (updated 06/24)
status: ground
source: synflex-q5100
where: Mechanical table, Tensile strength longitudinal row, 50 micron column
- benchmark: ultimate_tensile_strength
label: Tensile strength, Teonex Q5100 film 50 micron, transversal
value: 300
unit: MPa
scope: material
conditions:
thickness: 50 micron
direction: transversal
form: biaxially oriented film
method: Value printed in the same Mechanical table
status: ground
source: synflex-q5100
where: Mechanical table, Tensile strength transversal row, 50 micron column
- benchmark: elongation
label: Elongation at break, biaxial PEN film (Goodfellow data sheet)
value: 60
unit: '%'
scope: material
conditions:
form: biax film
method: Value printed in the Mechanical Properties table
status: ground
source: goodfellow-pen-tds
where: Mechanical Properties table, Elongation at break row
- benchmark: elongation
label: Elongation at break, Teonex Q5100 film 50 micron, longitudinal
value: 120
unit: '%'
scope: material
conditions:
thickness: 50 micron
direction: longitudinal
method: Value printed in the Mechanical table of the SynFlex data sheet
status: ground
source: synflex-q5100
where: Mechanical table, Elongation at break longitudinal row, 50 micron column
- benchmark: elongation
label: Tensile strain at break, PEN resin grade TN8050SC (ISO 527)
value: 15
unit: '%'
scope: material
conditions:
test: ISO 527-1,2, 50 mm/min
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Mechanical section, Tensile strain at break row
- benchmark: elastic_modulus
label: Tensile modulus, biaxial PEN film (Goodfellow data sheet)
value: 5
value_high: 5.5
unit: GPa
scope: material
conditions:
form: biax film
method: Range printed in the Mechanical Properties table
status: ground
source: goodfellow-pen-tds
where: Mechanical Properties table, Tensile modulus row
- benchmark: elastic_modulus
label: Tensile modulus, PEN resin grade TN8050SC (ISO 527)
value: 2200
unit: MPa
scope: material
conditions:
test: ISO 527-1,2, 1 mm/min
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Mechanical section, Tensile modulus row
- benchmark: flexural_modulus
label: Flexural modulus, PEN resin grade TN8050SC (ISO 178)
value: 2250
unit: MPa
scope: material
conditions:
test: ISO 178, 2 mm/min
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Mechanical section, Flexural modulus row
- benchmark: flexural_strength
label: Bending strength, PEN resin grade TN8050SC (ISO 178)
value: 99
unit: MPa
scope: material
conditions:
test: ISO 178, 2 mm/min
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Mechanical section, Bending strength row
- benchmark: yield_strength
label: Tensile yield stress, PEN resin grade TN8050SC (ISO 527)
value: 80
unit: MPa
scope: material
conditions:
test: ISO 527-1,2, 50 mm/min
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Mechanical section, Tensile yield stress row
- benchmark: heat_deflection_temperature
label: Deflection temperature under load at 1.80 MPa, PEN resin grade TN8050SC
value: 91
unit: °C
scope: material
conditions:
test: ISO 75-1,2
load: 1.80 MPa
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Thermal section, Deflection temperature under load (1.80MPa) row
- benchmark: heat_deflection_temperature
label: Deflection temperature under load at 0.45 MPa, PEN resin grade TN8050SC
value: 105
unit: °C
scope: material
conditions:
test: ISO 75-1,2
load: 0.45 MPa
grade: TN8050SC
method: Value printed in the TN8050SC property table
status: ground
source: plabase-tn8050sc
where: Thermal section, Deflection temperature under load (0.45MPa) row
- benchmark: thermal_conductivity
label: Thermal conductivity, biaxial PEN film at 23 °C
value: 0.15
unit: W m-1 K-1
scope: material
conditions:
temperature: 23 °C
form: biax film
method: Value printed in the Thermal Properties table
status: ground
source: goodfellow-pen-tds
where: Thermal Properties table, Thermal conductivity row
- benchmark: cte
label: Coefficient of thermal expansion, biaxial PEN film
value: 20
value_high: 21
unit: x10-6 K-1
scope: material
conditions:
form: biax film
method: Range printed in the Thermal Properties table, printed as 20-21 x10^-6 K^-1
status: ground
source: goodfellow-pen-tds
where: Thermal Properties table, Coefficient of thermal expansion row
- benchmark: max_service_temp
label: Upper working temperature, PEN film (Goodfellow data sheet)
value: 155
unit: °C
scope: material
conditions:
basis: upper working temperature as printed
method: Value printed in the Thermal Properties table
status: ground
source: goodfellow-pen-tds
where: Thermal Properties table, Upper working temperature row
- benchmark: max_service_temp
label: Continuous working temperature, Teonex Q 51 electrical film (UL 746B)
value: 160
value_high: 180
unit: °C
scope: material
conditions:
standard: UL 746B
note: printed as 160/180; the data sheet gives an electrical RTI of 180 °C and a mechanical RTI of 160 °C
method: Range printed in the technical data table of the Mueller-Ahlhorn data sheet
status: ground
source: mueller-q51-fi
where: Technical data table, Continuous working temperature row; Properties text on UL RTI
- benchmark: dielectric_constant
label: Dielectric constant, biaxial PEN film
value: 3.2
unit: '-'
scope: material
conditions:
frequency: 10 kHz (printed as @10KHz under a 1 MHz heading)
method: Value printed in the Electrical Properties table
status: ground
source: goodfellow-pen-tds
where: Electrical Properties table, Dielectric constant row
- benchmark: dielectric_strength
label: Dielectric strength, biaxial PEN film
value: 160
unit: kV/mm
scope: material
conditions:
thickness: 0.075 mm
method: Value printed in the Electrical Properties table
status: ground
source: goodfellow-pen-tds
where: Electrical Properties table, Dielectric strength row
- benchmark: dielectric_strength
label: Dielectric strength, Teonex Q 51 electrical film (JIS C-2318)
value: 250
unit: kV/mm
scope: material
conditions:
test: JIS C-2318
thickness: not stated on the data sheet
method: Value printed in the technical data table
status: ground
source: mueller-q51-fi
where: Technical data table, Dielectric strength row
- benchmark: moisture_absorption
label: Water absorption, biaxial PEN film
value: 0.4
unit: '%'
scope: material
conditions:
form: biax film
method: Value printed in the Physical Properties table
status: ground
source: goodfellow-pen-tds
where: Physical Properties table, Water absorption row
- benchmark: moisture_absorption
label: Water absorption, Teonex Q 51 electrical film (TDF method)
value: 0.3
unit: '%'
scope: material
conditions:
test: TDF method
product: Teonex Q 51 FI 14090
method: Value printed in the technical data table
status: ground
source: mueller-q51-fi
where: Technical data table, Water absorption row
corrosion:
- environment: Ultraviolet light
headline: The Goodfellow data sheet rates UV resistance as Fair; no quantitative UV test was found.
effect: The sales specification says PEN has better UV-penetration barrier properties than PET, but it gives no number. Weathering under sunlight is not quantified in the sources checked.
rating: moderate
conditions:
test: qualitative rating, no unit given
source: goodfellow-pen-tds
where: Physical Properties table, Resistance to Ultra-violet row
- environment: Hot humid conditions (hydrolysis and thermal ageing)
headline: Ageing at 140 to 190 °C in dry and wet air and nitrogen degrades PEN to a different extent from PET.
effect: The paper says PEN is thought to have increased thermal and hydrolytic resistance compared with PET, but few studies had examined PEN degradation. The abstract gives no numbers for the extent of loss; the full data were not readable.
rating: moderate
conditions:
temperature: 140 to 190 °C
atmospheres: dry nitrogen, dry air, wet nitrogen, wet air
source: strath-ageing-2011
where: Abstract
- environment: Continuous heat in air
headline: Continuous working temperature is 160/180 °C (UL 746B) for the electrical grade, and the upper working limit is 155 °C on the granule sheet.
effect: The data sheets give service limits only. Above them the film is not rated, and no strength loss at higher temperature was found in the sources checked.
rating: moderate
conditions:
standard: UL 746B
film: Teonex Q 51
source: mueller-q51-fi
where: Technical data table, Continuous working temperature row
- environment: Heat during processing (dimensional stability)
headline: Shrinkage after 30 min at 150 °C is 0.4 % longitudinal, rising to 0.8 % at 200 °C, for 50 micron film.
effect: Film shrinks when heated because it relaxes strain from manufacture. Shrinkage is small at 150 °C, and the 200 °C figure is about twice as large.
rating: low
conditions:
thickness: 50 micron
direction: longitudinal
tests: 30 min at 150 °C; at 200 °C
source: synflex-q5100
where: Mechanical table, Shrinkage rows, 50 micron column
- environment: Moisture uptake
headline: Water absorption is 0.3 % to 0.4 % for the films.
effect: Low uptake limits the water available for hydrolysis, but the ageing abstract still lists hydrolysis as a risk at elevated temperature.
rating: low
conditions:
test: TDF method (Mueller), printed as water absorption (Goodfellow)
source: goodfellow-pen-tds
where: Physical Properties table, Water absorption row
- environment: Chemical exposure
headline: Good resistance to dilute acids, alcohols, alkalis, aromatic hydrocarbons, greases and oils, halogenated hydrocarbons and ketones.
effect: Concentrated acids are rated Good to Poor. The ratings are qualitative and have no units.
rating: low
conditions:
basis: qualitative chemical resistance table
source: goodfellow-pen-tds
where: Chemical Resistance table
risks:
hazards:
- text: 'Indorama sales specification: the product does not require any hazard warning on the label under OSHA criteria. The DOT product shipping name is not regulated, and the HS code is 3907.99.'
ghs: []
source: indorama-pen-spec
where: Health and Safety Information; shipping paragraph
- text: Goodfellow data sheet rates the film VTM-2 under UL 94 at 0.075 mm, a thin-material vertical burn class.
ghs: []
source: goodfellow-pen-tds
where: Physical Properties table, Flammability row
failure_risks:
- mode: Hydrolytic and thermal ageing in hot, humid conditions
trigger: Ageing at 140 to 190 °C in wet air or wet nitrogen
consequence: The extent of degradation differs from PET, and the mechanism changes with temperature. The abstract gives no loss figures.
severity: moderate
source: strath-ageing-2011
where: Abstract
- mode: Shrinkage of the film when heated
trigger: 30 min at 150 °C, or 200 °C
consequence: 0.4 % shrinkage longitudinal at 150 °C and 0.8 % at 200 °C for 50 micron film.
severity: low
source: synflex-q5100
where: Mechanical table, Shrinkage rows, 50 micron column
side_effects: []
handling:
- text: Obtain the current safety data sheet for the grade before use. The Indorama sheet says a customer should consult the SDS before using any material.
source: indorama-pen-spec
where: Health and Safety Information
- text: Pellets are shipped in 1000 kg polypropylene fabric bags or 100 kg fibre drums, and four drums can go on one pallet.
source: indorama-pen-spec
where: Shipping and Handling Information
mitigations:
- text: Specify the grade by its continuous working temperature. For Teonex Q 51 this is 160/180 °C (UL 746B), which is the rated figure rather than the 155 °C upper working temperature on the granule sheet.
source: mueller-q51-fi
where: Technical data table, Continuous working temperature row
uses:
- application: electronics-and-chips
device: Slot, phase and wedge insulation in electric motors (Teonex Q 51 and Q5100)
example: Mueller-Ahlhorn says Teonex Q 51 was specially designed for slot and phase insulation and slot closure in electro motors with increased stress. SynFlex says Teonex Q5100 is for slot insulation, phase insulation and wedges in motors with increased load.
source: mueller-q51-fi
where: Applications section; SynFlex Application section for Q5100
- application: electronics-and-chips
device: Substrate for flexible integrated circuits
example: Wikipedia says PEN is a substrate for flexible integrated circuits, positioned as a replacement for PET, and cites emerging use in modern electronic devices.
source: wikipedia-pen
where: Benefits section; Applications section
supply:
- subject: Naphthalene-2,6-dicarboxylic acid (NDC or PNDA) and ethylene glycol, the monomers
abundance: Indorama says PEN is made from ethylene glycol and either NDC or PNDA, and that its monomers are EU REACH registered. No abundance or feedstock figure was found in the sources checked.
producers: []
critical_lists: []
recycling: No source found in the sources checked.
substitutes: []
source: indorama-pen-spec
where: Introduction paragraph; regulatory note on REACH
documents:
- title: Goodfellow technical data sheet, PEN Granules (SKU 1000082271, product ES36-GL-000100)
type: datasheet
url: https://www.goodfellow.com/global/technical_data/pdf/download?sku=1000082271
year: 2024
- title: Mueller-Ahlhorn data sheet, Teonex Q 51 FI 14090 (electrical insulating material)
type: datasheet
url: https://www.mueller-ahlhorn.com/wp-content/uploads/2024/02/Teonex-Q51-FI-14090-ENG.pdf
year: 2024
- title: SynFlex product datasheet, Teonex Q5100 (updated 06/24)
type: datasheet
url: https://www.synflex.com/fileadmin/user_upload/Teonex_R__Q5100.pdf
year: 2024
- title: Indorama Ventures sales specifications, Polyethylene Naphthalate (PEN), CAS 24968-11-4 / 25853-85-4
type: datasheet
url: https://www.indoramaventures.com/storage/downloads/product/intro-naphthalates/pen/en/PENINTRO.pdf
year: 2021
- title: Plabase property table, Teonex TN8050SC (Teijin Limited)
type: database
url: https://en.plabase.com/plastic/items/5bf4b186bfe33314ea415b5e
year: 2026
- title: Double glass transition in polyethylene naphthalate by MDSC, BDS, and TSDC (arXiv:2307.11537)
type: paper
url: https://arxiv.org/pdf/2307.11537
year: 2023
- title: Ageing of poly(ethylene terephthalate) and poly(ethylene naphthalate) under moderately accelerated conditions (Strathprints)
type: paper
url: https://strathprints.strath.ac.uk/42262/
year: 2011
gaps:
- No atomic-oxygen erosion yield or flight result for PEN was found. The MISSE PEACE report (NASA/TM-2001-211311) and the NASA/TM-2008-215490 table list PET and polyethylene but no PEN.
- No PubChem record or GHS classification for PEN or for the monomers was read. PubChem returned a bot-check page and HTTP 400, so the monomer hazards (NDC, ethylene glycol) are not covered.
- No supplier safety data sheet for a PEN grade was read. The Goodfellow SDS button is a placeholder link, and no Toyobo or Teijin SDS was found.
- The NICNAS report on the dimethyl NDC monomer (NA/504, CAS 840-65-3) could not be downloaded in this pass, so its hazard classification is not covered.
- The glass transition value differs by source and method. The 387 K value is a primary MDSC transition of a quenched sheet. A 121 °C value quoted in a national film archive glossary could not be opened (blocked), so it is not used.
- Humidity and heat ageing have no numeric results. The Strath abstract gives only the temperatures and the qualitative result. Turnbull et al. (2012) full text was not accessible. Quantitative hydrolysis rate data were not found.
- UV resistance has only the qualitative Goodfellow rating (Fair). No UV transmission or tensile-retention figure for PEN film was found.
- Supply shares are missing. No USGS, EU or trade-association source covers PEN or naphthalene-2,6-dicarboxylic acid. Market-research pages name producers (DuPont Teijin Films, Toray, SKC, Sumitomo Chemical and others), but their shares conflict and were not used.
- 'The grade named Teonex is printed under different owners: DuPont (Mueller-Ahlhorn), TOYOBO (SynFlex) and Teijin (plabase). Each property is tied to the grade and source on its own line.'
- The NIST atomic-weight table gives C, H and O only as intervals (for example carbon 12.0096 to 12.0116), so the recipe gives atom counts in the role text and no atomic weights.
- 'Media: no PEN image with a confirmed licence was read in this pass.'
- Tekra product pages for Teonex Q 53 and Q 83 returned HTTP 403, so they are not used.
- Volume and surface resistivity, intrinsic viscosity and dimensional shrinkage are printed in the sources but are not in property-canon.yaml, so they are left out.
sources:
goodfellow-pen-tds:
title: Goodfellow technical data sheet, PEN Granules (5mm, 10000 g), material properties for polymers
id: SKU 1000082271; product code ES36-GL-000100; CAS 24968-11-4
url: https://www.goodfellow.com/global/technical_data/pdf/download?sku=1000082271
year: 2024
kind: datasheet
license: Supplier data sheet (cited, not reproduced)
mueller-q51-fi:
title: Dr. Dietrich Mueller GmbH, Teonex Q 51 FI 14090, electrical insulating material
id: Teonex Q 51 FI 14090
url: https://www.mueller-ahlhorn.com/wp-content/uploads/2024/02/Teonex-Q51-FI-14090-ENG.pdf
year: 2024
kind: datasheet
license: Supplier data sheet (cited, not reproduced)
synflex-q5100:
title: SynFlex Elektro GmbH, product datasheet Teonex Q5100 (updated 06/24)
id: Teonex Q5100
url: https://www.synflex.com/fileadmin/user_upload/Teonex_R__Q5100.pdf
year: 2024
kind: datasheet
license: Supplier data sheet (cited, not reproduced)
indorama-pen-spec:
title: Indorama Ventures, sales specifications of polyethylene naphthalate (PEN), June 2021
id: CAS 24968-11-4 / 25853-85-4
url: https://www.indoramaventures.com/storage/downloads/product/intro-naphthalates/pen/en/PENINTRO.pdf
year: 2021
kind: datasheet
license: Supplier specification (cited, not reproduced)
plabase-tn8050sc:
title: Plabase property table, Teonex TN8050SC (Teijin Limited)
id: plabase item 5bf4b186bfe33314ea415b5e
url: https://en.plabase.com/plastic/items/5bf4b186bfe33314ea415b5e
year: 2026
kind: database
license: Materials database (cited, not reproduced)
arxiv-pen-mdsc:
title: Double glass transition in polyethylene naphthalate by MDSC, BDS, and TSDC (Canadas et al.)
id: arXiv:2307.11537
url: https://arxiv.org/pdf/2307.11537
year: 2023
kind: paper
license: arXiv preprint (cited)
strath-ageing-2011:
title: Ageing of poly(ethylene terephthalate) and poly(ethylene naphthalate) under moderately accelerated conditions, J. Appl. Polym. Sci.
id: University of Strathclyde, Strathprints 42262
url: https://strathprints.strath.ac.uk/42262/
year: 2011
kind: paper
license: Open access repository record (cited)
wikipedia-pen:
title: Wikipedia, Polyethylene naphthalate
id: CAS 24968-11-4 (Identifiers section)
url: https://en.wikipedia.org/wiki/Polyethylene_naphthalate
kind: web
license: CC BY-SA 4.0 (cited, not reproduced)
license: CC-BY-4.0
updated: '2026-10-26'
review:
status: draft
method: assistant
checked_values: 27
unreachable: 6
caveats: 6
note: Read by an AI assistant on 2026-10-26 from fetched data sheets, a sales specification, an open preprint, an ageing paper and a materials database. PubChem, the Tekra pages and the NICNAS report could not be opened. No PEN flight erosion value was found.
story:
recipe:
line: PEN is a polyester made by joining naphthalene-2,6-dicarboxylic acid (or its dimethyl ester) with ethylene glycol through ester links. Each repeat unit (C14H10O4) has a naphthalene ring where PET has a benzene ring, and that larger aromatic ring stiffens the chain. Indorama describes PEN as analogous to PET but with improved thermal, barrier and UV properties.
parts:
- name: Carbon
symbol: C
role: Ten carbons in the naphthalene ring, two in the carboxyl groups and two in the ethylene linker.
- name: Hydrogen
symbol: H
role: Six on the naphthalene ring and four on the ethylene linker.
- name: Oxygen
symbol: O
role: Two ester groups, each with a carbonyl oxygen and an ether oxygen.
risk_groups:
- title: For people
level: 0
verdict: Not classified hazardous under OSHA criteria
lead: The PEN sales specification says no hazard label is needed under OSHA criteria. No GHS record for PEN was found in the sources checked.
points:
- label: The resin
line: Indorama's sales specification says no hazard warning is required on the label under OSHA criteria, and that the DOT shipping name is not regulated.
- label: The film
line: The Goodfellow data sheet rates the 0.075 mm film VTM-2 under UL 94, a thin-material vertical burn class.
- label: Monomers
line: The sales specification says the monomers are EU REACH registered. Their hazard data were not found in the sources checked.
- title: If it overheats
lead: The data sheets give the service limits. Above them the film is not rated.
points:
- label: Service limit
line: The Mueller-Ahlhorn sheet gives a continuous working temperature of 160/180 °C (UL 746B) for Teonex Q 51. The Goodfellow sheet gives an upper working temperature of 155 °C.
- label: Shrinkage
line: The SynFlex sheet gives 0.4 % longitudinal shrinkage after 30 min at 150 °C, and 0.8 % at 200 °C, for 50 micron film.
- title: Handling and storage
points:
- label: Moisture
line: Water absorption is 0.3 % to 0.4 %. The ageing paper says PEN is thought to resist hydrolysis better than PET, but it gives no loss figures for hot, humid exposure.
- label: Packing
line: Pellets are sold in 1000 kg fabric bags or 100 kg fibre drums.
why: Polyethylene naphthalate (PEN) is a polyester film and resin. It is the naphthalene analogue of PET, and the extra ring gives improved thermal properties, as Indorama says. The electrical grade Teonex Q 51 is rated for 160/180 °C in UL 746B service, and Mueller-Ahlhorn says Teonex has better properties than PET-polyester films, including temperature resistance. Its weakness is that its ageing behaviour is less studied than PET's, and no atomic-oxygen flight data were found.
uses:
- where: Electric motors
line: Mueller-Ahlhorn says Teonex Q 51 was specially designed for slot and phase insulation and slot closure in electro motors with increased stress. SynFlex says Teonex Q5100 is for slot insulation, phase insulation and wedges.
- where: Flexible electronics
line: Wikipedia says PEN is a substrate for flexible integrated circuits and is positioned as a replacement for PET.
can_do:
- label: Heat
benchmark: max_service_temp
line: The electrical grade Teonex Q 51 is rated for a continuous working temperature of 160/180 °C under UL 746B. The granule sheet gives an upper working temperature of 155 °C.
- label: Strength
benchmark: ultimate_tensile_strength
line: Biaxial PEN film has a tensile strength of 200 MPa. Teonex Q5100 at 50 micron has 290 MPa longitudinal and 300 MPa transversal.
- label: Stiffness
benchmark: elastic_modulus
line: The TN8050SC resin grade has a tensile modulus of 2200 MPa (ISO 527). Biaxial film has 5 to 5.5 GPa.
- label: Dielectric
benchmark: dielectric_strength
line: Teonex Q 51 lists a dielectric strength of 250 kV/mm (JIS C-2318), and the biaxial film lists 160 kV/mm at 0.075 mm.
compare: Mueller-Ahlhorn says Teonex has better properties than PET-polyester films, including temperature resistance. The arXiv measurement gives a primary glass transition of 387 K (114 °C) for quenched PEN sheet, and the DSC melting point is 269 °C for the electrical grade. The continuous working temperature of 160/180 °C is the rating to compare with other electrical films. The compare table below sets PEN against the benchmarks it has values for.
compare_rows:
- label: Density
benchmark: density
- label: Melting point
benchmark: melting_point
- label: Glass transition temperature
benchmark: glass_transition_temperature
handling:
- Obtain the current safety data sheet for the grade before use. Indorama says the customer should consult the SDS for any material.
- Keep the film below its continuous working limit of 160/180 °C for electrical service.
- Keep pellets in their supplied bags or drums until use, as the Indorama sheet describes the packing.
good_for:
- Motor slot and phase insulation, where the 160/180 °C rating and 250 kV/mm dielectric strength are used.
- Flexible electronics substrates, where a higher glass transition than PET is wanted (Wikipedia).
watch_out:
- Ageing data are thin. No atomic-oxygen flight value, and no quantitative humidity or UV result, was found.
- The shrinkage at 200 °C (0.8 % at 50 micron) means that hot processing needs control.
- Trademark owners differ between the sources (DuPont, TOYOBO and Teijin), so check the grade and its data sheet.
verdict: PEN is a heat-tolerant polyester film with a 160/180 °C electrical rating. It is a sound choice for motor insulation and flexible substrates, but its behaviour in vacuum, UV and humidity needs a grade-specific test before flight use.
References
Every number above carries a reference number. Click one to see the source and where in it the value comes from.
| # | Source | Type | Year | Used for |
|---|---|---|---|---|
| Goodfellow technical data sheet, PEN Granules (5mm, 10000 g), material properties for polymers | datasheet | 2024 | 14 values | |
| Dr. Dietrich Mueller GmbH, Teonex Q 51 FI 14090, electrical insulating material | datasheet | 2024 | 7 values | |
| SynFlex Elektro GmbH, product datasheet Teonex Q5100 (updated 06/24) | datasheet | 2024 | 5 values | |
| Indorama Ventures, sales specifications of polyethylene naphthalate (PEN), June 2021 | datasheet | 2021 | 6 values | |
| Plabase property table, Teonex TN8050SC (Teijin Limited) | database | 2026 | 8 values | |
| Double glass transition in polyethylene naphthalate by MDSC, BDS, and TSDC (Canadas et al.) | paper | 2023 | 1 value | |
| Ageing of poly(ethylene terephthalate) and poly(ethylene naphthalate) under moderately accelerated conditions, J. Appl. Polym. Sci. | paper | 2011 | 2 values | |
| Wikipedia, Polyethylene naphthalate | web | 1 value |