FZ/T 75004-2014 《Coated fabrics.Determination of elongation and tensile permanent deformation》 Related products

The standard specifies test methods for the determination of tensile elongation, tensile delayed deformation and tensile permanent deformation of coated fabrics by means of fixed elongation or fixed load. It is applicable to various coated fabrics. The terms and definitions covered include tensile permanent deformation, tensile permanent deformation rate, tensile delayed deformation and tensile delayed deformation rate. The principle of the test is to stretch the specimen to a predetermined elongation value or apply a predetermined load value at a specified speed, return to zero load after a certain period of time, and measure the amount of deformation of the specimen that has not recovered. The required instruments and tools include an isokinetic elongation tester, which requires that the center point of the holder is on the tensile axis and can hold the specimen to ensure correct testing.