it is made of 100% polyester yarn that has high tensile strength,high resistance to alkali, ... ,salt,heat and abrasion SpecificationsBag closing thread is made of 100% polyester yarn that has high tensile strength,high resistance to alkali ... machines (Stationary & Portable) - Sewing of multi-wall paper bag, PP woven bag, jute, Gunny, Hessian and Bulk Bag (FIBC), etc. - For ...