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Linear dimensional changes/dimensional stability/temperature stability of films and sheets

Determination of linear dimensional changes after exposure to temperature (till ca. 175°C, depending on material) of plastic films and sheets. Please select test temperature. We recommend the examination of shrinkage or shrinking stress for shrink films.

In short — AI-generated

This test measures how much a plastic film or sheet changes in size when exposed to specific elevated temperatures. Samples are placed in a temperature-controlled oven for a defined period, and the change in length and width is measured after the material has cooled back to room temperature.

The resulting value indicates the material's dimensional stability, helping to predict how a film will behave during heat-intensive processes like sterilization or heat sealing. This data allows developers to select materials that will not shrink or warp unexpectedly during production or end-use applications.

Text is AI-generated; based on test method data curated and verified by Innoform.

Test Method Group: Mechanical properties

Norms:
  • DIN EN ISO 11501 (2004-10) Plastics – Film and sheeting – Determination of dimensional change on heating
  • DIN 53377 (2015-04) Testing of plastic films – Determination of dimensional stability
  • ASTM D 1204 (2014) Standard Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature

Required Sample Amount: Approx. 1 m² or 15 DIN A 4 sheets, minimum sample width 250 mm; preferably samples over the complete material width, e. g. approx. 1 linear metre of 1 m width

Standard Tests

dimensional stability, measurement on a tempered kaolin bed (our standard method, according DIN EN ISO standard)

Specific Norm: DIN EN ISO 11501

dimensional stability, measurement on a polyester nonwoven (according DIN standard)

Specific Norm: DIN 53377

dimensional stability measured on paper ligthly dusted with talc (according ASTM standard)

Specific Norm: ASTM D 1204

Specific Norm: DIN 53377

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