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Arnitel® PM381

Technical Datasheet | Supplied by DSM
Arnitel® PM381 by DSM is a high-performance, food contact quality, thermoplastic copolyester (TPC) grade. It is a lighter, smarter, greener alternative to conventional rubbers thus, reducing environmental impact. It is processed by film extrusion. It offers intrinsic breathability, excellent colorability, extrusion lower torque & better stability measured in tolerances. This grade possesses flexibility, strength, excellent processing characteristics and resistance to degradation during curing. It offers chemical resistance against household chemicals like cleaning agents, sunscreen lotion and automotive greases and oils. Arnitel® PM381 allows for reliable solutions, since it yields a breathable film that balances the application-specific gas mixture of O2 and CO2, and the moisture inside the package. It allows for the possibility to run at lower film thickness and at higher extrusion speed versus TPU, which allows for a lower cost system. It is used in breathable films for food packaging, house wrap, industrial cords & ropes, infusion membrane bags and mandrels as supportive tool. Also, used in plasters due to its easy stretchability with low forces, not putting tension on the wound area. It meets ISO 18064 for TPC-ET.
Product Type
  • Polyester TPE > COPE
  • Polyester [Polyester] > > Co-polyester
Physical Form
Product Status

Arnitel® PM381 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Melt Volume Flow Rate (MVR)
4.7 cm3/10 min
(At 230°C, 2.16 kg)
ISO 1133
Humidity Absorption
0.4 %
( )
ISO 62
1160 kg/m3
( )
ISO 1183

Arnitel® PM381 Processing Guidelines

Extrusion Properties

Value & Unit
Test Condition
Test Method
Moisture Content
< 0.05 %
Dew Point
-30 - -40 °C
Drying Time
4 - 8 hr
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