... to alkali,acid,salt,heat and abrasionOur bag closing thread application:- Widely used for many brands of bag closing machines (Stationary & ... , Charcoal, etc. - Binder (Reinforced Material) for making Filter Fabric, Canvas, Ropes, Webbing, Core Thread for Zipper, etc Standard Specification: - NE 20/6 ... in our products, pls feel free to contact us for more details. 100% polyester bag closing thread