Comtuf® 425 - A. Schulman Inc. -

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Comtuf 425 by A. Schulman Inc. is a PBT (Polybutylene Terephthalate) plastic material with filler: Glass Fiber Reinforcement, 40%.

General Information

Product Description

This Polyester grade exhibits excellent chemical resistance, thermal stability and dimensional stability. U.V. and color stability can be achieved by utilizing appropriate stabilizers. Polyesters can be mixed with flame retardants, PTFE, polysilicone oxide and graphite. Polyesters can accept melt mixing, and can be reinforced with a variety of fillers and fibers.

Polyesters are moisture sensitive and, before any melt process, must be dried to moisture content of less than 0.04%. If immersed in water, polyesters absorb less than 0.2%; therefore, short or long term mechanical properties are not significantly affected by the amount of moisture uptake.

Some additional start-up conditions for processing of glass fiber reinforced PBT suggest maximum and medium pressures on injection and hold, respectively, along with a slow screw speed.

General

Material Status

Commercial: Active

Availability

North America

Test Standards Available

ASTM

Filler / Reinforcement

Glass Fiber Reinforcement, 40% Filler by Weight

Additive

Impact Modifier

Features

Good Chemical Resistance

Good Color Stability

Good Dimensional Stability

Good Impact Resistance

Good Thermal Stability

Good UV Resistance

Impact Modified

Forms

Pellets

Processing Method

Injection Molding

Other Information for this Plastic
How to Access the Full Plastic Material Data Sheet for this Grade
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Features (Alternate Representations)
Good Chemical Resistance, Chemical Resistant, Good Thermal Stability, Good Dimensional Stability, Dimensionally Stable, Good UV Resistance, UV Resistant, Ultraviolet Resistant, Ultraviolet Light Resistant, Good Color Stability, Good Impact Resistance.
Spelling Variations
The terms listed below may be used to identify this product. They are provided to assist you in finding pertinent documentation from supplier and non-supplier sources. They are included for informational purposes only, and are typically NOT representations that have been specified by the supplier. Possible spelling variations for terms related to this product are: Comtuf® 425, Comtuf 425, Comtuf® , Comtuf, Comtuf425, 425, Polybutylene Terephthalate, PBT, Polyester, A. Schulman, PolybutyleneTerephthalate

The information presented on this plastic material data sheet was acquired by IDES from various sources, including the manufacturer of the resin and recognized testing agencies. In some cases, plastic material updates have been integrated directly into the IDES Plastics Database by the resin manufacturer utilizing the IDES Data Maintenance Tool. IDES makes substantial efforts to assure the accuracy of this plastics data. However, IDES assumes no responsibility for the data values and urges that upon final plastic material selection, data points are validated with the resin manufacturer.

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