The right sewing thread for woven bags Two threads, two structures, two very different behaviours on your bag-closing line. What actually differs — and how to choose with confidence. WHY IT MATTERS Not all sewing threads behave the same on a PP woven bag. Spun polyester and PP multifilament look similar on the shelf, but they are built from different structures — and that structure shows up in how they sew, how they hold, and how they last. Here is the plain-language differen

In industrial woven sack packaging, the choice of sewing thread directly determines seam reliability, production efficiency and total packaging cost. This analysis compares 12/4 spun polyester bag closing thread (Tex 200 linear density, 8.6 kg single-thread breaking strength) with equivalent-thickness polypropylene (PP) filament thread, based on measurable physical properties and real-world packaging performance. 1. Specification Baseline Both threads are compared at the same

Selection Guide for Polyester Bag Sewing Thread: Model Matching by Bag Weight & Key Considerations 1. Core Principle of Selection Polyester bag sewing thread is a critical consumable for industrial package sealing. Its thickness and tensile strength directly determine the sealing reliability and transportation safety of industrial bags. The core principle of selection is matching thread strength with bag weight, while taking into account bag material, sewing equipment, and se

Bag sewing thread is an indispensable core auxiliary material in the industrial and agricultural packaging fields. Its performance directly determines the sewing firmness, service life and appearance texture of packaging bags, and the selection of raw materials is the key core to determining the comprehensive performance of the thread. Bright polyester fiber and semi-gloss polyester staple fiber are the two most commonly used raw materials in the production of bag sewing thre