Polyester yarn refers to polyester as raw material spinning yarn, polyester is a kind of polymer by spinning and made of fiber, mostly refers to ethylene phthalate as raw material production of fiber, according to the English name of its raw material "polyethylene terephthalate" abbreviation, referred to as "PET" fiber. In our country, it is commonly known as polyester. The so-called "yarn" is actually a collective term for "yarn" and "thread", which is defined as follows in clothing material science: "yarn" is to arrange many staple fibers or filaments into an approximately parallel state, and rotate and twist along the axial direction to form a slender object with a certain strength and linear density; A "thread" is a strand formed by twisting two or more single yarns. Yarn is a thin strand of cotton, wool, hemp, chemical fibers and other fibers that stretch and twist the fibers (usually used as raw materials for weaving), and then use cotton, linen, silk, wool and other fine strands of materials to form multiple strands, called threads.

Different classification methods produce different names: 1) Different raw materials used: cotton yarn, purified chemical fiber yarn, cotton-type blended yarn, wool-blended yarn, special-shaped yarn, etc. 2) Different spinning methods: ring spinning yarn, airflow spinning yarn, electrospinning yarn, etc. 3) The spinning process is different: carded cotton yarn, combed yarn, peach hair yarn, etc. 4) Different twisting directions: smooth twist (s twist) yarn, backhand twist (yarn z twist). 5) Different product uses: yarn for weaving, yarn for knitting, yarn for pileing, yarn for rope belt, yarn for fishing net, yarn for cord cloth, etc.

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Polyester staple fiber is a synthetic fiber that is widely used in various fields due to its good physical and chemical properties. Here are some of the main applications of polyester staple fiber. 1. Textiles: Polyester staple fiber is commonly used in the production of textiles, such as clothing, bedding, home décor, etc. Due to its softness, abrasion resistance, wrinkle resistance and ease of dyeing, textiles made of polyester staple fiber are of high quality and durability. 2. Nonwovens: Polyester staple fiber can be used in the manufacture of nonwovens. Nonwovens are textiles formed by combining fibers with each other by physical, chemical or mechanical methods. The high strength and durability of polyester staple fiber make it ideal for manufacturing nonwovens, which are widely used in filter materials, medical supplies, household goods and other fields. 3. Carpet: Because polyester staple fiber has the characteristics of wear resistance and easy to clean, it is widely used in the manufacture of carpets. Carpets made of polyester staple fiber are durable, colorful and resistant to contamination, making them suitable for use in homes and businesses. 4. Filling material: polyester staple fiber can be used to make filling materials, such as pillows, quilts, sofa cushions, etc. The elasticity and softness of polyester staple fiber make it an ideal filling material for a comfortable sleeping and sitting experience. 5. Industrial use: polyester staple fiber can also be used in industrial fields. For example, polyester staple fiber can be used to make filter materials, such as air filters, oil-water separators and water treatment equipment. In addition, polyester staple fiber can also be used to manufacture insulation materials, reinforcements and fireproof materials. In short, polyester staple fiber is widely used, involving textiles, nonwovens, carpets, filler materials and various industrial uses. Due to its good physical and chemical properties, polyester staple fiber plays an important role in various fields.

Twist in the textile industry refers to the degree to which a yarn or fiber is twisted during the process of making yarn. Twist refers to the number of twists or degrees of twist per unit length of yarn, usually expressed in terms of twist factor. Twist revolutions refer to the number of times a yarn or fiber is twisted per unit length. Twist is very important in the textile industry because it directly affects the strength, flexibility, uniformity of the yarn and the look and feel of the yarn. The size of the twist depends on the purpose of the yarn and the desired properties. Effect of twist: 1. Strength: Proper twisting can increase the strength of the yarn so that it can withstand greater tensile forces. This is important for textiles that require durability and strength, such as sportswear, outdoor products, etc. 2. Flexibility: Moderate twisting can increase the flexibility and elasticity of the yarn, making it easier to weave or weave into fabric. Soft textiles are perfect for intimate clothing and comfortable bedding. 3. Uniformity: Proper twisting can improve the uniformity of the yarn, making it easier to handle in the textile process. Homogeneous yarns help reduce defects in textiles and improve the appearance quality of fabrics. 4. Appearance and feel: Twist also directly affects the look and feel of the yarn. A higher twist makes the yarn look tighter and the surface smoother. This yarn is suitable for making textiles such as silk and wool that require a glossy and smooth surface. The lower twist makes the yarn appear more loose, fluffy and pilling, suitable for yarn, wool fabrics and so on. The measurement of twist is usually done using a twist meter. A twist meter measures the number of twists in a yarn and is expressed in twist revolutions (inches or meters). Manufacturers often set twist standards for yarns as needed, and control twist to ensure yarn quality and consistency. In conclusion, twist is an important parameter in the textile industry, which has a direct impact on the performance and appearance quality of the yarn. Manufacturers need to control the twist according to different textile uses and requirements to ensure that the final product has the required characteristics and quality.

Recycled polyester yarn is a textile raw material made from waste polyester fiber or polyester waste. Compared to conventional polyester yarn, recycled polyester yarn has the following advantages: 1. Environmental protection: Waste polyester fiber or polyester waste is used in the production process of recycled polyester yarn, which reduces the consumption of natural resources. At the same time, the production process of recycled polyester yarn also reduces the discharge of wastewater, waste gas and solid waste, and has less impact on the environment. 2. Energy saving: In the production process of recycled polyester yarn, due to the use of waste polyester fiber or polyester waste, there is no need to go through the synthesis and spinning of polyester, saving a lot of energy. 3. Economical: The production cost of recycled polyester yarn is relatively low, because its raw material is waste polyester fiber or polyester waste, and there is no need to buy new polyester fiber. At the same time, the market demand for recycled polyester yarn is gradually increasing, with good market prospects. 4. Stable quality: In the production process of recycled polyester yarn, the waste polyester fiber or polyester waste used is strictly screened and processed to ensure the stable quality of the fiber. The product quality of recycled polyester yarn can meet different application needs. 5. Recyclable: Recycled polyester yarn is a recyclable fiber material that can be recycled again. At the end of the textile service life, recycled polyester yarn can be reprocessed to make new textiles, extending the life of textiles and reducing resource consumption. In general, recycled polyester yarn has the advantages of environmental protection, energy saving, economy, stable quality and recyclability. With the increase in attention to environmental protection and sustainable development, recycled polyester yarn, as a textile raw material that can replace traditional polyester yarn, will be more widely used in the future.