Parameters affecting extrusion foaming of PET by gas injection

Document Type

Article

Publication Date

3-1-2000

Abstract

The rheological properties of conventional PET resins are not particularly suitable for low density extrusion forming with physical blowing agents, and as a result modified resins with higher melt viscosity and elasticity are often used. In this work, parameters affecting the monolayer flat sheet extrusion of foams having variable densities (from about 1.2 to 0.2 g/cc) are presented. Unmodified and chemically modified resins with different melt viscoelastic properties are used. The effects of variables such as type and concentration of atmospheric gases, resin rheology and choice of process conditions are related to product characteristics, including density, crystallinity and thermoformability.

Identifier

0033897837 (Scopus)

Publication Title

Journal of Cellular Plastics

External Full Text Location

https://doi.org/10.1106/YCRT-DGV7-BLE4-17TV

ISSN

0021955X

First Page

102

Last Page

111

Issue

2

Volume

36

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