GB/T 42695-2023 English PDF (GBT42695-2023)

This document describes a method of chemical analysis for the determination of the fiber content of two-component mixtures of kapok with certain other fibers after removal of non-fibrous matter. This document applies to two-component mixtures of kapok and certain natural protein fibers (silk, sheep wool, other animal hair fibers), certain native cellulose fibers (cotton, flax, ramie), certain regenerated cellulose fibers (viscose fiber, modal fiber, lyocell fiber, copper ammonia fiber), polyester fiber, polypropylene fiber, polyethylene fiber, polyamide fiber, polyacrylonitrile fiber, certain modified acrylic fibers, polyurethane elastic fiber, polyvinyl alcohol fiber, acetate fiber or triacetate. This document does not apply to mixtures where cotton fibers or regenerated cellulose have been subjected to severe chemical degradation, nor does it apply to mixtures in which there are durable finishing agents or reactive dyes that cannot be completely removed in the kapok, making them insoluble. Note: See Appendix A for the qualitative identification method of kapok.