What special processes are used to ensure that Sewing Thread is not easy to break during long-term use?
Publish Time: 2024-10-29
Sewing Thread is not easy to break during long-term use, which is ensured by a series of special processes and quality control measures.
1. Material selection
Fiber material: High-quality Sewing Thread is usually made of high-quality fiber materials, such as polyester fiber, nylon, cotton fiber, silk, etc. These materials have the characteristics of high strength, wear resistance, and not easy to break, which can provide Sewing Thread with better toughness.
Blending technology: Through blending technology, two or more fibers of different properties are mixed together, which can combine the advantages of different fibers and improve the overall performance of Sewing Thread.
2. Yarn production
Dissolution and dyeing: Put polyester chips and other raw materials into the solvent for dissolution, and add dyes and auxiliaries for dyeing and adjusting the yarn performance.
Filtration and impurity removal: After filtering, impurity removal, degassing and other processes, ensure the purity of yarn quality and remove foreign matter.
Stretching and cooling: The dissolved polyester liquid is continuously extruded into the heating area, and the fibrous polyester yarn is formed by stretching and cooling under high temperature and high pressure.
Weaving and lubrication: The polyester yarn is stretched, lubricated and other steps are taken to form yarn of a certain specification, and its softness and smoothness are increased.
3. Fine yarn processing
Leading treatment: The yarn is led through a belt take-up machine or roller and other equipment to make the yarn present a certain linear shape.
Wetting and drying: The yarn absorbs lubricants better and reduces the occurrence of static electricity.
Fine yarn processing: The quality and strength of the yarn are improved by reducing the diameter of the yarn and increasing the tensile properties of the yarn.
4. Twist and twist direction
Twisting: Twisting the fiber structure of the thread causes relative angular displacement between the cross sections of the thread, thereby changing the structure of the thread. Twisting can give the thread certain physical and mechanical properties such as strength, elasticity, elongation, gloss, and feel.
Twist control: The twist of the thread is proportional to the strength, but after a certain twist, the strength decreases. Therefore, it is necessary to control the appropriate twist to ensure the strength and toughness of the Sewing Thread.
Twist direction selection: Twist direction is divided into S direction and Z direction, which is determined according to the needs of the finished product and post-processing, and is generally Z twist direction.
5. Quality control and testing
Raw material testing: Strict quality testing of raw materials to ensure that they meet production requirements.
Production process control: During yarn production and spun yarn processing, strict process control and quality testing are carried out to ensure the quality stability of each link.
Finished product testing: The finished product Sewing Thread is tested for strength, wear resistance, elongation at break and other indicators to ensure that it meets the use requirements.
In summary, Sewing Thread is not easy to break in long-term use, which is guaranteed by special processes and quality control measures in many aspects such as material selection, yarn production, spun yarn processing, twist and twist direction control, quality control and testing, and use and maintenance. These measures jointly improve the strength and toughness of Sewing Thread, enabling it to maintain stable performance for a long time.
