... to alkali,acid,salt,heat and abrasion SpecificationsBag closing thread is made of 100% polyester yarn that has high ... resistance to alkali,acid,salt,heat and abrasionOur bag closing thread application:- Widely used for many brands of bag closing ... , Charcoal, etc. - Binder (Reinforced Material) for making Filter Fabric, Canvas, Ropes, Webbing, Core Thread for Zipper, etc Standard Specification: - NE 20 ...