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

Both 12/4 and 12/5 are widely used industrial 100% polyester bag sewing threads. They share the same single‑yarn count, while their core difference lies in the number of plies, which directly affects thread thickness, tensile strength, wear resistance and application scenarios. It is an essential reference for packaging industry selection. 1. Basic Structure & Specification Difference The number “12” stands for Ne12 English cotton count, meaning the thickness of single raw ya

I. Core Functions Handheld sewing thread uses polyester staple fiber as the core raw material, designed specifically for manual or semi-automatic sewing scenarios of various packages. Its core functions include: Reinforcement and Sealing : Through the high-strength fiber structure, it achieves tight sewing of packaging bags (such as woven bags, paper bags, cloth bags), preventing materials from leaking, getting damp or contaminated during storage and transportation; Convenien

A lot of our dear customers interested with how the sacks sewing thread produced and what is the processing for threads . From this video...

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