Core Spun Yarn

Core Spun Yarn

Product Introduction of
Core Spun Yarn

Core spun yarn is a new type of yarn made from two or more kinds of fibers. In recent years, it's more and more used in the textile industry as a substitute for expensive natural fiber like wool yarn. More and more brands are also gradually accepting the core yarn, using it to do clothes.

We independently develop and produce various core-spun yarns, such as high-twist core-spun yarns and rabbit hair core-spun yarns. The core-spun yarn production process combines the characteristics of various yarns, and the rapid screening of production can simulate or even exceed the performance of a certain fiber, and the price also has a great advantage. In 10+ years of development, we have accumulated a lot of core-spun yarn production experience and can recommend or develop appropriate core-spun yarn specifications according to customers' production needs.

Core-spun yarn is widely used in the knitwear manufacturing industry.

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Core Spun Yarn

Product nameCompositionCountProduct nameCompositionCount
Rabbit cashmere high-elastic core spun yarnViscose polyester nylon28S/2Wool velvet core spun yarn10 wool 40 anti-pilling acrylic 28PBT 22 nylon28S/2
High twist core spun yarnVisocse polyester28S, 60S, 80SModal core spun yarn25 Modal 25 Viscose 22 Nylon 28 Polyester28S/2
Cotton core spun yarnCotton28S/2Cashmere core spun yarn10 wool 45 viscose 25 nylon 20 polyester28S/2
Color dot core spun yarn55 viscose 32 nylon 13 polyester28S/2Three strands of rabbit hair core spun yarn51 viscose 28 polyester 21 nylon32S/2
Glitter core spun yarn47 viscose 22 nylon 26 polyester 5 flashing silk28S/2Modal & cashmere core spun yarnModal cashmere viscose polyester nylon28S/2
Slub core spun yarn50 viscose 23 nylon 27 polyester24S/2AB symphony core spun yarn20 acrylic 20 nylon 27 polyester 33 viscose28S/2
Sequin rabbit hair core spun yarn43 viscose 36 polyester 21 nylon15S/1Silver core spun yarn30 viscose 20 nylon 20 polyester 30 silver wire28S/2
Rabbit hair core spun yarn51 viscose 28 polyester 21 nylon28S/2Alpaca core spun yarn42 acrylic 28 nylon 30 polyester18S/2
High elastic core yarn50 viscose 28 polyester 22 nylon28S/2Anti-pilling fiber velvet core spun yarn50 anti-pilling acrylic 28 polyester 22 nylon28S/2

Core Spun Yarn
industry uses

Clothing fabric manufacturing industry

Stretch fabric manufacturing industry

Decorative fabric manufacturing industry

Sewing thread manufacturing industry

Core Spun Yarn

  • Excellent performance of filament core yarn
  • Excellent performance of outer short fiber

Core Spun Yarn

  • Sweater
  • Sock
  • Sheet
  • Sofa cover
  • Scarf
  • Gloves

Core Spun Yarn Knowledge

1. Core Spun Yarn Definition

The core spun yarn definition in textile industry is: A core spun yarn refers to a composite yarn combined by a core yarn and a outer yarn; generally with a filament as a core yarn, the short fiber is an outer yarn.

2. Introduction of Core Spun Yarn

Core-spun yarns are generally made of synthetic fiber filaments with good strength and elasticity as the core yarn, with short fibers such as cotton, wool, and viscose fibers being twisted together. The core-spun yarn has the excellent properties of filament core yarn and short-wrapped fiber. The more common core-spun yarn is polyester-cotton core-spun yarn, which uses polyester filament as the core yarn and wraps cotton fibers. There is also spandex core-spun yarn, which is a yarn made of spandex filament as the core yarn and other fibers as outer yarn. The knitted fabric or jeans material made of this core-spun yarn can stretch freely and fit comfortably when wearing.

At this stage, the core-spun yarn has developed into many types, which can be summarized as three types: short fiber and short fiber core-spun yarn, chemical filament and short fiber core-spun yarn, chemical filament and chemical filament core-spun yarn. At present, most core-spun yarns are generally composed of chemical fiber filaments as the core yarn and wrapped with various short fibers to form a unique structure of core-spun yarn. Commonly used chemical fiber filaments for its core yarns include polyester filaments, nylon filaments, and spandex filaments. The outer short fibers include cotton, polyester cotton, polyester, nylon, acrylic and wool fibers.

3. Core Spun Yarn Advantages

In addition to its special structure, core-spun yarn has many advantages. It can take advantage of the excellent physical properties of core yarn chemical fiber filaments and the performance and surface characteristics of short-coated short fibers to give full play to the characteristics of the two fibers and make up for their shortcomings. For example, polyester-cotton core-spun yarn can give full play to the advantages of polyester filaments that are crisp, crepe-resistant, easy to wash and dry, and at the same time, it can also take advantage of the advantages of outer cotton fiber that it has good moisture absorption, low static electricity, and is not easy to fuzz and pilling. The woven fabric is easy to dye and finish, comfortable to wear, easy to wash, bright in color, and beautiful in appearance. The core-spun yarn can also reduce the weight of the fabric while maintaining and improving the properties of the fabric. It also uses the different chemical properties of chemical fiber filaments and the outer fiber. During the dyeing and finishing of the fabric, a part of the outer fiber is rotten by chemicals to make it. Burnt-out fabric with three-dimensional pattern effect, etc. The use of core-spun yarn is currently the most widely used core-spun yarn with cotton as the skin and polyester as the core. It can be used to produce school uniforms, work clothes, shirts, bathrobe fabrics, skirt fabrics, sheets and decorative fabrics. In recent years, an important development of core-spun yarns is the use of polyester core spun yarns covered with viscose, viscose and linen or cotton and viscose blends, as well as cotton and silk or cotton and wool. Blended covered core-spun yarns, these products are very popular.

Its advantages are summarized as follows:

(1) It feels very comfortable, simulating the feel of expensive fibers such as cashmere, and can even achieve the effect of being fake.

(2) Cheap price is the biggest advantage of core-spun yarn. Guess how cheap it is? For example, the price of woollen wool this year is about 220 yuan per kilogram; for cashmere, it is about 850 yuan per kilogram; even the yarn with 60% wool is more than 40 yuan per kilogram. The price of core-spun yarn is only RMB 30 per kilogram.

These two biggest advantages have made core-spun yarn a kind of yarn that has been particularly favored in the past two years. Regardless of whether it is marketed or branded, many clothing manufacturers are using it. Of course, many high-end clothing may not use core-spun yarn, after all, the textile industry knows that it is a low-end category of yarn.

4. Core Spun Yarn Disadvantages

To be honest, as a core-spun yarn supplier, we understand all aspects of its properties, and really can’t find out its big shortcomings. You said that core-spun yarn pilled, it does pilling; but it is undeniable that wool and cashmere will also pilling.

The only disadvantage of core-spun yarn, in my opinion, is that it is heavier. If you use it to make clothes, there will be the following unsatisfactory aspects:

(1) The fluffy feeling of clothes will not be as good as wool clothes.

(2) Clothes cannot be made into sweaters that are light and thick. If they are thick, the clothes will be very heavy, and they will feel tired when worn on the body.

5. Core Spun Yarn Type

According to the different uses of core-spun yarns, the main types of core-spun yarns currently include: core-spun yarns for apparel fabrics, core-spun yarns for stretch fabrics, core-spun yarns for decorative fabrics, and core-spun yarns for sewing threads. There are also many spinning methods for core-spun yarn: ring spinning, electrostatic spinning, vortex spinning, self-twist spinning and so on. At present, my country's cotton spinning industry mostly uses cotton ring spinning to spin core-spun yarn.

5.1 Classification by product use

It can be divided into core-wrapped yarn for sewing, core-wrapped yarn for rotten fabric, elastic fabric (including knitted fabric, woven fabric) core-wrapped yarn, fancy core-wrapped yarn (such as hollow core-wrapped yarn, color core-wrapped yarn, cyrofield core-wrapped yarn, bamboo core-wrapped yarn, etc.), functional and high-performance fabric core-wrapped yarn, etc.

5.2 Classification by core yarn filament

Generally, it can be divided into rigid core-spun yarns and elastic core-spun yarns. The former has polyester, acrylic, vinylon (including water-soluble vinylon), nylon, etc., and the latter has spandex, PTT fiber, PBT fiber, DOW XLA elastic fiber, etc.

5.3 Classification by sheath yarn fiber

Usually cotton, wool, silk, hemp (including ramie, flax, hemp, etc.), colorful cotton and other natural fibers; Sticky fiber, MODAL, TENCEL, soybean fiber, milk fiber, bamboo pulp fiber, polyester fiber, acrylic fiber and all kinds of colored chemical fiber can be used for core-spun fiber.

5.4 Classification by spinning equipment

At present, ring spinning, rotary spinning, friction spinning, air jet spinning and other spinning devices can be added to produce all kinds of core-spun yarn. Spinning devices are basically the same.

5.5 Classification according to filament (core yarn) content

Filament content in core-spun yarns is the main index of core-spun yarns, which has great influence on yarn performance and cost. Generally, filament content below 10% is called low ratio core-spun yarn; 10%~40% medium ratio core-spun yarn; Over 40% is called high ratio core-spun yarn. Elastic core-spun yarn content is generally less than 10%, 3%~5%, the higher the proportion, the higher the cost. Pure polyester sewing core-spun yarn, core-spun yarn ratio up to 50~60%. The content of core yarn used in rotten fabric is 40~60%, and the content of general rigid core-wrapped yarn is 20~40%. Core yarn content should not be too high, is restricted. Theoretically, the covering width of the outer fiber should be larger than the surface perimeter of the core yarn, otherwise "Ruth" defects will occur.

5.6 Classification according to yarn density

In the same classification as traditional yarns, core-spun yarns of 32tex and above are classified as coarse special core-spun yarns, 21-30tex medium special core-spun yarns, 11-20tex fine special core-spun yarns. The core-spun yarn is 16~70tex.

6. The difference between core spun yarn and covered yarn

The difference between core-spun yarn and covered yarn, we take spandex core-spun yarn and spandex covered yarn as examples:

Spandex core-spun yarn is spandex wrapped with short fibers, with spandex as the core and non-elastic short fibers outsourcing. When the spandex core-spun yarn is stretched, the core yarn is generally not exposed.

Spandex covered yarn is an elastic yarn formed by covering the spandex with the filament of chemical fiber, which is also made of spandex as the core, and the non-elastic staple fiber or filament is wrapped in a spiral manner to cover the elongated spandex yarn. It has core exposed under tension

The core-spun yarn has poor elasticity, but the core yarn is not easy to be exposed to produce aurora; covered yarn is easy to produce aurora, but the elastic elongation ability is better.

We have another post talking about the difference between core spun yarn and covered yarn, please have a look if you're interested.

7. core spun yarn manufacturing process in our factory

As a core-spun yarn factory, we feel it is necessary to show everyone the production process of core-spun yarn, so that everyone can better understand what kind of core-spun yarn is.

In our core-spun yarn factory, the production of core-spun yarn is divided into the following processes:

opening and cleaning→ carding→ drawing→ roving→ spinning→ post processing.

After this series of processes, the selected staple fiber will eventually become the finished core-spun yarn.

7.1 Opening and cleaning process

In this process, the short fiber is made into a uniform fiber roll to create conditions for carding process.

7.2 Carding process

After opening and cleaning process, the fibers were loose and contained from 40% to 50% impurities. Carding process can mix the fibers evenly and be bundled with a single fiber that is parallel to normal, while also removing impurities with strong adhesion.

7.3 Drawing process

In the drawing process, after the fiber strip is mechanically processed, the distance between the fiber and the fiber becomes closer, and the mixed composition and color of the fiber are more uniform. The treated fiber strips are wound into appropriate packages for use in subsequent processes.

7.4 Roving process

The main task of the roving process is to stretch and draw the fiber strips according to certain technical parameters, improve the parallel elongation of the fiber, and at the same time, the fiber gets the appropriate twist and is wound into shape, so as to facilitate the storage and use of the next process.

7.5 Spinning process

The spinning process is to spin the roved fiber into a spun yarn. During the process, a proper twist is added to makes the spinning yarn have a certain strength, elasticity, gloss, feel and other physical and mechanical properties. After this, the spun yarn would be ready for the subsequent process.

7.6 Post processing

Although the spinning of spinning machine has basically completed the spinning task, it does not mean the completion of the whole spinning project. In addition to the filling yarn directly from the spinning workshop to the weaving workshop, other varieties according to the processing requirements need to undergo appropriate post-processing. The yarn processing process after the spinning process is collectively referred to as the post-processing process, which mainly has the following four purposes:

(1) Improve the internal performance of products

(2) Improve the appearance quality of products

(3) Stabilize the structural state of the product

(4) Make the appropriate roll form

8. Raw material of Core Spun Yarn

8.1 Choice of core wire

The fineness of the core filament and the number of single filaments in it should be selected according to the use of the fabric and the spinning count. For core filaments of the same size, the thinner the filaments, the more the number of filaments, and the softer and smoother the fabric; on the contrary, the fewer the number of core filaments, the more rigid and stiff the fabric. For coated products, there is no need to consider the luster of the core wire, and the light core wire can be used to reduce production costs; if the exposed product is produced, the luster of the core wire should be considered. Effect. If producing 11.8tex (50s) polyester-cotton core-spun yarn for skirt materials and shirt fabrics, it is advisable to use ordinary low-strength and high-elongation 5.56tex(50D)/24F semi-gloss polyester filament as the core yarn. When core-spun yarn is used as sewing thread, generally select high-strength, low-elongation bright polyester filament with a large number of monofilaments above 7.78tex(70D)/36F. When used as burnt-out outerwear, bright polyester filaments below 7.56tex(68D)/36F can be used. But for the core-spun yarn used in burnt-out fabrics, the fineness of the core yarn should be too large. Generally, 7.22-8.33tex (65-75D)/36F matt or semi-gloss polyester filament is used to prevent burnt-out. Part is too thin, too thin and cause aurora. For the core-spun yarn used in elastic fabrics, the fineness of the core yarn can be selected according to the purpose of the fabric. Generally, polyester 7.78tex (70D) spandex yarn is used, and the draft ratio is about 3.8 times. For the medium (medium-low count) spandex core-spun yarn for warp-directed strong corduroy and stretch work cloth, the spandex yarn draft should be larger, about 3.8-4.0 times, which can ensure the wearing of stretch pants. At this time, the hips and knees have better resilience.

8.2 Choice of Outer Fiber

If cotton fiber is used as the outer fiber, theoretically, raw cotton with long length, high count and good maturity should be used as much as possible. But it should depend on the purpose of the product. If you are not making high-speed sewing threads, but making shirt fabrics or skirt materials, or other burnt-out decorative fabrics, you do not need to use good raw cotton, because they do not need to withstand high-speed sewing threads. The test of that kind of strong friction and high temperature melting will not produce "skinning" phenomenon, so 30mm long raw cotton can meet the requirements. However, the outer cotton used as the core-spun yarn of burnt-out fabrics has less neps and impurities. It is better if rayon is used as the outer fiber, with low strength, good dyeing performance and less neps and impurities.

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Contact us today! No matter where you are, our experts will provide the right solution for your yarn needs.
Connect with us:
We will get back to you within one business day.
Contact sales manager