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Plastics - Injection moulding of test specimens of thermoplastic materials - Part 4: Determination of moulding shrinkage (ISO 294-4:2018)
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This document specifies a method of determining the moulding shrinkage and post-moulding shrinkage of injection-moulded test specimens of thermoplastic material in the directions parallel to and normal to the direction of melt flow. For the determination of shrinkage of thermosets, see ISO 2577[2]. Moulding shrinkage as defined in this document excludes the effects of humidity uptake. This is included in post-moulding shrinkage and thus in total shrinkage. For cases when post-moulding shrinkage is caused by the uptake of humidity only, see ISO 175[1]. Moulding shrinkage as defined in this document represents the so-called free shrinkage with unrestricted deformation of the cooling plates in the mould during the hold period. It is considered, therefore, as the maximum value of any restricted shrinkage.
To find similar documents by classification:
83.080.20 (Thermoplastic materials)
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Designation Name
SS-EN ISO 294-4:2019
Revision Level
2019 EDITION
Status
Current
Publication Date
Feb. 18, 2019
Language(s)
English
Page Count
24
International Equivalent
EN ISO 294-4:2019(IDT); ISO 294-4:2018(IDT)