Temperature Guidelines
Nominal Resin Specifications
Click on each below to learn more.
PP = Polypropylene
PE = Polyethylene
LDPE = Low Density Polyethylene
MDPE = Medium Density Polyethylene
HDPE = High Density Polyethylene
PTFE = Polytetrafluoroethylene
PET = Polyester
N = Nylon
Resin: |
Polypropylene (PP) |
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* Polypropylene products produced for some filtration applications are made from resin that complies with FDA regulations for food contact. The regulation compliance is product number dependent / specific. * Impact at cold temperatures is likely to cause strand cracking or breakage |
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Resin: |
Low Density Polyethylene (LDPE) |
* All natural LDPE products are manufactured with resin that complies with FDA regulations for food contact. |
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Resin: |
Medium Density Polyethylene (MDPE) |
* Made from resin that is not compliant with FDA regulations for food contact, unless otherwise specified (product number dependent / specific). |
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Resin: |
High Density Polyethylene (HDPE) |
* Made from resin that is not compliant with FDA regulations for food contact, unless otherwise specified (product number dependent / specific). |
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Resin: |
Polytetrafluoroethylene (PTFE) |
* PTFE products are stabilized to control open area percentages. As product thickness increases so does the likelihood of shrinkage in applications where temperatures are elevated. |
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Resin: |
Polyester (PET) |
Resin: |
Nylon 6 (N) |
* Nylon products produced for some filtration applications are made from resin that complies with FDA regulations for food contact. The regulation compliance is product number dependent / specific. |
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Definitions for Thermal Characteristics:
- HDT - Heat Deflection Temperature - The temperature of the medium at which a deflection of 0.25 mm is noted in a sample bar when subjected under pressure, 66 PSI.
- Vicat Softening Temperature - The temperature at which a flat-ended needle of 1-mm2 circular cross section will penetrate a thermoplastic specimen to a depth of 1 mm under a specified load using a selected uniform rate of temperature rise.
- Melting Temperature - The temperature at which the material starts to loose its flexible thermoplastic properties and begins to permit viscous flow readily.
- Glass Transition Temperature - The temperature at which the molecular structure becomes restricted which causes the material to become hard and brittle. It is the temperature at which the thermoplastic behaves like a flexible material rather than a crystalline or glassy material at lower temperatures.
Electrical Conductivity
Most plastics do not permit the flow of electric current and are, therefore, considered to be nonconductive.
Disclaimer:
The nominal information reported in this document was obtained from various manufacturers resin brochures, polymer processing books, and various internet websites. Temperature charts are to be used an a General guide only. Charts do not reflect nor are to be used as a warranty of product performance.