Spun Polyester

Pattern:Dyed
Style:High stretch polyester spun yarn
Technics:Textured,twisted,dyed.
Yarn Type:DTY, texturized, twisted dyed spun yarn
Feature:Anti-bacteria, Eco-friendly, anti-pilling, moisture-absorbent
Use:Knitting
Twist:80-100TPM
Evenness:98%
Yarn count:36F
Strength:3.00-4cn/dtex
Color fastness:More than 4

Spun yarns of textile fabrics:

To understand clothing fabrics, we must first understand what is spun yarn and what is yarn, because any textile fabrics are made up of spun yarn. The so-called spun yarn: not only is the textile fibers arranged in parallel, and twisted products. The product of twisting two or more spun yarns is called yarn or strand.

There are many classifications of spun yarn classifications. Here we only introduce the general classifications.

A) According to spinning process, it can be divided into combed spun yarn, carding spun yarn and semi-combed spun yarn.

B) According to spun yarn dyeing and finishing and post-processing classification can be divided into: this white spun yarn, bleached spun yarn, dyed spun yarn, glossy spun yarn, mercerized spun yarn and so on.

C) Classified by spun yarn thickness (yarn count), such as roving, medium count, spinning and high count spun yarns.

The fineness, thickness, weight and grade of textile fabrics, in which the spun yarn fineness is one of the decisive factors

The linear density of fibers and the linear density of length fibers refer to the degree of fineness of fibers. Fiber length refers to the length of the spun yarn fibers. Textile fibers must have a certain linear density and length in order to make the fibers embrace each other, and depend on the friction between the fibers to spin spun yarns.Therefore, textile fibers spun yarn have a certain linear density and length, which is one of the necessary conditions for textile processing and making products of use value. The linear density of textile fibers spun yarn is closely related to the properties of spun yarns and fabrics produced by textile processing.

Generally speaking, the lower linear density and better uniformity of fibers are beneficial to textile processing and product quality. Among the influences of linear density of fibers on the wearability of fabrics spun yarn, the fabrics spun yarn made of finer fibers are softer and softer in luster. Thinner fabrics spun yarn can be made from finer fibers, as well as clothing fabrics with good air permeability and silk-like effect. But fine fibers spun yarn make fabrics easy to fuzz and pill, while coarse fibers can be used to make stiff, rough and thick fabrics. Similarly, the length of textile fibers spun yarn is closely related to the quality of textiles and products.

Long fiber spun yarn length, good length regularity and less short fiber spun yarn content are beneficial to textile processing and product quality. Under the same conditions, if the fibers are longer, the spun yarn strength is high, the spun yarn evenness is uniform, the spun yarn surface is smooth, the fabrics made have good fastness, smooth appearance, and are not easy to fuzz and pill. In addition, on the premise of ensuring a certain yarn quality, the longer the fiber spun yarn, the finer the yarn can be spun, which can be used to make lighter fabrics. For short length, length is more important than linear density. For example, length is the most important index in cotton grade and price. 

In textile fibers, the linear density and length of natural fibers spun yarn are not uniform, sometimes the difference is large. It varies with the variety and growth conditions of fibers.Chemical fibers spun yarn are manufactured artificially. The linear density and length of fibers spun yarn can be controlled and determined artificially in a certain range according to the requirements of fiber processing and use.

Expanded spun yarn is first spun from two fibers with different shrinkage, and then treated with steam or hot air or boiling water. At this time, the fibers spun yarn with high shrinkage produce larger shrinkage, which is located in the center of the yarn, while the blended fibers with low shrinkage are extruded on the surface of the spun yarn due to small shrinkage. In this way, the bulky yarn with fluffy, plump and elastic shape can be obtained.

Core-spun yarn is generally made of synthetic filament with good strength and elasticity as core spun yarn and cotton, wool, viscose and other staple fibers twisted together. Core-spun yarn has both excellent properties of filament core yarn and outer staple fiber. The common core-spun yarn is polyester-cotton core-spun yarn, which takes polyester filament as core yarn and cotton fiber as outer covering. There is also spandex core-spun yarn, which is made of spandex filament as core yarn and other fibers outsourced. Knitted fabrics or jeans made of this core-spun yarn can be easily retracted and fitted comfortably when worn. The linear density of fibers and spun yarns is one of the most important physical and geometric characteristics of fibers. It not only affects the textile processing and product quality, but also has a close relationship with the wearability of fabrics.

Similarly, linear density is also the most important index of spun yarn. Yarn density affects the physical and mechanical properties, handle and style of textiles. It is also an important basis for fabric design. The spun yarn density of fibers and yarns can be expressed in many ways. Generally, indirect indexes proportional to the cross-sectional area of spun yarns are used to express the yarn density. Commonly used indicators are Turks (number), metric support, British support, denier and so on. Generally speaking, the spun yarn density of fibers and yarns can be divided into two categories: fixed length and retail.Fixed length system refers to the weight of a certain length of fibers or spun yarns. The larger the value, the thicker the fibers or spun yarns are. At present, tex, dtex, MTeX and D are commonly used.

The legal unit of measurement in our country is the special number system.Tekes is short for "Te". It refers to the weight grams of 1000 meters long fibers spun yarns at a given moisture regain. Tex is commonly known as the number of cotton yarns. In addition, the spun yarn density can be expressed by diameter. Spun yarn diameter is an important basis for fabric design and manufacturing process parameters. It can be measured under a microscope. But in actual production, spun yarn diameter is converted from the count or count of yarn and yarn density. In the linear density representation of ply spun yarn, the special number system is expressed by multiplying the single spun yarn count of the ply yarn by the number of plys, such as 14 *2.

When the specific number of single spun yarn in ply yarn is different, it is expressed by adding the specific number of single spun yarn, such as 16 + 18. The count system is expressed by dividing the count of the single spun yarn that makes up the strand by the number of strands, such as 50/2. If the number of single spun yarns is different, the number of single spun yarns should be juxtaposed and slanted, such as 24/48. The filament linear density of chemical fibers is expressed by the number of monofilaments and the total Tex number. For example: 16.5 tex/30 f, densities of multifilament buses are 16.5 tex and single filament roots are 30. The filament linear density of chemical fibers or silk is the sum of the filament linear density of the composite filament.

Chemical resistance of fibers refers to the resistance of fibers to the destruction of various chemicals. In textile dyeing and finishing process, fibers will be exposed to water, acid, alkali, salt and other chemical substances to varying degrees. At the same time, fibre products will also be exposed to various chemicals, such as detergents, finishing agents and so on.Therefore, as a textile fiber spun yarn, it must have certain chemical resistance to meet the requirements of textile dyeing, finishing and product use. In addition, only by understanding the chemical resistance of various textile fibers spun yarn, can we reasonably select appropriate processing conditions and use various fibre products correctly.

Among all kinds of textile fibers spun yarn, cellulose fibers have strong alkali resistance, but weak acid resistance.The chemical resistance of protein fibers spun yarn is different from that of cellulose fibers. It has stronger resistance to acid than to alkali. Protein fibers spun yarns are operated in different degrees in strong or weak alkali, and even lead to decomposition. The chemical resistance of synthetic fibers spun yarn is stronger than that of natural fibers, such as polypropylene and polyvinyl chloride fibers spun yarn, which have excellent acid and alkali resistance.