The polyester core-spun sewing thread features a unique structure with polyester filament as the core and polyester staple fiber as the coating layer, perfectly meeting the sewing requirements and post-processing needs of denim fabric. It is gradually replacing traditional pure cotton threads and ordinary polyester staple fiber threads, becoming the preferred sewing thread in the denim production industry

1. The core characteristics of polyester core sewing thread lay the foundation for denim application

The core advantage of polyester core sewing thread lies in its double-layer structure of “core layer support and coating layer efficiency enhancement”. The core layer is made of high-strength polyester filament (usually accounting for 60% of the overall thread body), and the coating layer is made of high-quality polyester staple fiber, which is produced through multiple processes such as spinning and double twisting. This structure combines strength, toughness, and sewing adaptability, perfectly matching the material characteristics of denim fabric, and distinguishing it from the single characteristic of ordinary polyester staple fiber thread (SP thread) and pure cotton thread.

2. Specific application scenarios of polyester core sewing thread in denim fabric

Based on the different types and sewing requirements of denim products, the selection of specifications and application scenarios for polyester core sewing thread have their own focuses. The core is to balance strength, appearance, and cost. Common specifications range from Tex40 to Tex150, suitable for denim fabrics of different thicknesses and styles. Specific applications can be divided into the following categories:

  1. Application of core sewing parts in denim clothing

Cowboy clothing is the main application scenario of polyester core sewing thread, with a focus on adapting to the stress and appearance parts. The selection of specifications should be based on the thickness of the fabric and design requirements.

  1. Adaptation application of special style denim products

With the diversification of denim styles, special styles such as retro denim, distressed denim, and stretch denim continue to emerge. Polyester core sewing thread can be flexibly adapted according to process requirements

3. Summary and development trend of advantages of polyester core sewing thread in denim application

Compared with traditional pure cotton sewing thread and ordinary polyester short fiber thread, polyester cored sewing thread has achieved multiple breakthroughs in “strength, toughness, beauty, and durability” in denim fabric applications. Its core advantages can be summarized into three points: first, strong adaptability, perfect matching of the thick, heavy, and wear-resistant characteristics of denim fabric, and strict post-processing technology, solving the pain points of traditional sewing thread breakage, fading, shrinkage, etc.