ISO 1798 Tensile Strength of Flexible Cellular Polymeric Materials

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ISO 1798 Tensile Strength of Flexible Cellular Polymeric Materials

ISO 1798 determines the tensile strength and elongation of flexible cellular materials (polyurethane foam) when a test piece is extended at a constant rate until it breaks. It's often used in the production of furniture, packaging/packaging materials, carpets, bedding materials.

What Is ISO 1798?

ISO 1798 determines the strength and deformation properties of flexible soft foam cellular materials when a test sample is pulled at a constant test speed until it breaks. It is commonly used to compare materials and for quality control purposes.

What Other Standards Relate to Tensile Testing of Flexible Cellular Foam Plastic?

ASTM D3574 Method E Tensile Testing of Flexible Polyurethane Foam

Test Machines for Rigid & Flexible Polymer Foams

Our universal test machines serve multiple plastic testing applications and are capable of performing virtually all quasi static tension/compression tests, such as tensile, peel, adhesion, and flexural testing. The machine force capacity should be chosen by taking into account the highest force needed over the lifetime of the equipment. Our machines feature a uniform constant rate of extension (CRE), or constant velocity control mode, with a speed range between 1 and 500 mm/min (0.04 to 20 in/min). Force measurement complies with ISO 7500-1.

The majority of flexible plastics tests can be performed at loads under 4.5 kN (500 lbs).

What Test Fixtures Are Recommended for ISO 1798?

Pneumatic Vise Grips offer ease of sample loading, consistent clamping force, self alignment, and interchangeable jaws with smooth, serrated, and corrugated (wave) surfaces.

ISO 1798 Specimens

If the test material shows a predominant direction of the cellular structure (orientation of the cells), then the test samples should be taken so that their longitudinal axes lie at right angles to the testing direction. Test samples are rectangular and with or without skin. The test samples are cut out with one of the two types of test sample cutters and are 10 to 15 mm (0.3 to 0.5 in) thick.