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Standard

NS-EN ISO 294-4:2019

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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.

Dokumentinformasjon

  • Standard fra SN
  • Publisert:
  • Utgave: 2019-02
  • Versjon: 1
  • Varetype: NAT
  • Products.Specs.pages
  • ICS 83.080.20
  • National Committee SN/K 609

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