Classification and manufacturing process of cored thread

1. Core-wrapped sewing threads clothing: sewing threads clothing made of filament as core and cotton-coated polyester staple fiber or high-quality long-staple cotton. Its strength depends on the core threads clothing, while wear resistance and heat resistance depend on the outer fiber. Therefore, core-wrapped sewing threads clothing is suitable for high-speed sewing, high-strength clothing and other related fields. 

2. Classification of core-wrapped sewing threads clothing: Core threads clothing are generally made of polyester filaments with high strength, low elongation and low shrinkage. Cotton-coated polyester staple fiber is called polyester-coated polyester core-spun threads clothing. The expression in English is poly-poly. Outsourcing high quality long-staple cotton is called cotton-coated polyester core-spun threads clothing. The expression in English is cotton-poly.

3. Production process: The technological route of core-spun threads clothing is basically the same as that of conventional staple fibre textile process, that is, staple fibers are made into roving strips by combing machine and two parallel processes, and then fed into spinning machine for normal drafting. The polyester filament is fed into the front roller through the additional device and tension control device of the spinning frame, through the filament introduction device, and converges with the drafted staple fibers at the front roller nipper of the spinning frame. After the output of the front roller, it passes through the guide hook and forms the core-wrapped yarn under the twisting and winding of the ring and traveler. After heat setting of tube threads clothing, the finished product is heated and shaped again through automatic winder, high speed winder and double twisting process, and the finished product is packed into warehouse.

Polyester-coated polyester core-spun threads clothing

1) Suitable for decorative sewing of shoes, belts, handbags and suitcases, coats, bedding and tablecloths. 

2) Suitable for high pressure sewing, such as decorative sewing on sofa furniture, industrial safety gloves and jeans. 3) Suitable for sportswear, boys'and girls' coats, suits and casual clothes, eye-lock baseline, etc. 

4) Applicable to jeans, its high resistance, sofa cushion, mattress, protective clothing and tents etc. 

5) Applicable to leather and leather products, slippers and so on. 

6) Suitable for all kinds of strong stitching, such as trousers bags, eyelid thread, work clothes and mattresses. 

7) Outerwear, sportswear, overcoat, skirt and jacket for boys and girls, suitable for ordinary sewing machines and automatic production equipment. 

8) It is a widely used sewing threads clothing for suits, skirts, jackets, shirts, swimsuits, underwear and knitted clothing. It is also suitable for all kinds of processes and machinery, such as collar, sleeve, bag, cuff and button hole, especially for the fabric which easily causes wrinkles in the stitching position, and for bedding and down products, curtains and cloth tents, as well as for the surface and bottom line of multi-stitch stitching. 

9) It is suitable for light and thin fabrics, especially for fabrics that are prone to wrinkle in stitching position, and for high quality sewing. 

Cotton-coated polyester core-spun threads clothing: (with polyester and cotton double slightly core-spun threads clothing

1) Suitable for waterproof cloth, tents, heavy cloth and cushioned furniture, etc. 

2) The central part is polyester, which is suitable for cushion furniture and automobile industry. 

3) Suitable for jeans, cushions and industrial clothes. 

4) Suitable for decorative sewing of leather and jeans, cushioned furniture and slippers, etc. 

5) Suitable for pants, jeans, overalls, mattresses and bedding. 

6) Suitable for skirts, shirts, underwear, swimming suits and knitted clothes. It is also suitable for bed sheets and curtains. 

7) It is suitable for light and thin fabrics, knitted clothes and underwear.

There are many kinds of sewing threads clothing and they are widely used. Some commonly used sewing threads and their characteristics are as follows:

Cotton sewing threads clothing

Cotton sewing threads clothing is generally made of combed cotton threads clothing, with high strength, low elongation, good heat resistance, stable sewing threads clothing, good universal seamability, and strong anti-static performance. It is mainly used for sewing cotton fabrics and other natural fiber fabrics. However, cotton sewing thread has large washing shrinkage and poor dyeing fastness.

Silk sewing threads clothing

Silk sewing threads clothing includes silk thread and silk spinning threads clothing. Silk sewing threads clothing has high strength, good gloss, low shrinkage, high temperature resistance and good sewing performance.

Hemp sewing threads clothing

Ramie sewing threads clothing mainly includes ramie threads clothing and flax threads clothing. Because ramie fiber is softer and longer than flax fiber, the performance of ramie fiber is better than that of flax sewing threads clothing and its application scope is wider. Because of the characteristics and special production process of hemp, hemp yarn has the characteristics of high strength, small elongation, fast moisture absorption and desorption, and high wear resistance.

Polyester sewing threads clothing

Polyester sewing threads clothing has high strength, small washing shrinkage, small elongation, good elasticity, low shrinkage, wear resistance, corrosion resistance, good weather resistance and heat resistance, good thermal stability and dimensional stability, good shrinkability. Compared with sewing thread made from other raw materials, it has linear performance, service life, price and comprehensive economic benefits. The advantages of these aspects are becoming more and more obvious. Especially in recent years, various kinds of polyester threads clothing have replaced most cotton, silk and other sewing threads clothing, and have occupied the vast majority of the total sewing threads clothing output.

Polyester sewing threads clothing include polyester staple threads clothing and polyester filament threads clothing. There are four types: pure polyester staple threads clothing sewing threads, multi-strand polyester filament sewing threads clothing, deformed polyester filament sewing threads clothing and polyester core-wrapped sewing threads clothing. Among them, polyester core-spun sewing threads clothing is an upgraded product.

Development of polyester core-spun sewing threads clothing

Core-spun sewing threads clothing belong to composite sewing threads clothing. They consist of core threads clothing located in the center and fiber cladding layers on the outside. Core threads clothing can be chemical filaments, metal filaments and other threads clothing, and cladding layers can be cotton, wool, linen and other chemical fibers. Generally, the core-spun threads clothing is made of synthetic filament with high strength, and natural fibers with good heat resistance are covered on the surface of synthetic fibers. The sewing threads clothing made by this method has both excellent intrinsic properties of filament and excellent surface characteristics of natural short fibers, giving full play to the advantages of the two kinds of fibers. According to the performance requirements of sewing products, core-spun sewing threads clothing with required properties and quality can be designed by choosing the types, proportions and synthetic properties of core and covering fibers. Core-spun threads clothing is usually made from conventional ring spinning frame by proper modification. The composite filament and staple fibers are combined at the front roller to form core-spun threads clothing. After heat setting, air twisting and double twisting, the core-spun sewing threads clothing is made, which has not only high strength, good wear resistance, good heat resistance and stability, but also long service life.