Core Wrapped Spandex Yarn

Why Choose Us?

Rich experience

Xiamen Lilong Spandex Co., Ltd was established in 2003, It specializes in the R&D and production of high-tech specialty fibers.

 

High quality

The company introduced complete sets of continuous spinning production technology. High-temperature resistant, high-rebound, chlorine-resistant, phenol-resistant, and other differentiated spandex yarn from 12D to 1680D.

Technological innovation

Over the years, Lilon has fully utilized its talent and technological advantages, continuously exploring and innovating in the field of high-tech special fibers. It independently developed high-temperature resistant, high-rebound, chlorine-resistant, phenol-resistant, and other differentiated spandex with stability.

High quality service

Adhering to the spirit of "unity, positivity, development, and innovation", the company persists in the management policy of "promoting customer satisfaction with quality and meeting customer needs with innovation", winning customers and selling well worldwide.

 

What Is Core Wrapped Spandex Yarn

 

Core wrapped spandex yarn is an elastic yarn formed by covering the elongated spandex yarn with the spandex yarn as the core, and wrapping the elongated spandex yarn with the filament or short fiber yarn in a spiral manner.

The Characteristics of Core Wrapped Spandex Yarn

 

Air-covered yarn (abbreviated as empty package, English abbreviation as ACY) is the outsourcing fiber filament and spandex yarn drafted through a certain type of nozzle at the same time, and the rhythmic network points are formed by the regular spray pressure of high-compression air. Yarn. The fabric feels soft and smooth.

 

Mechanically covered yarn (abbreviated as machine package, English abbreviation is SCY) is to continuously rotate the outer fiber filament and wind it on the core silk spandex that is drawn at a constant speed, and it has twist after twisting (English abbreviation is TPM) ), the flat and crisp fabric style is its main feature.

Difference Between Core Wrapped Spandex Yarn and Covered Yarn

 

The difference between the two, we take spandex core-spun yarn and spandex covered yarn as an example. Spandex core-spun yarn is spandex wrapped with short fibers, with spandex as the core and non-elastic short fibers outside, and the core yarn is generally not exposed when stretched. Spandex covered yarn is spandex covered with chemical fiber filaments. It is also an elastic yarn formed by covering the elongated spandex filaments with non-elastic staple fibers or filaments in a spiral manner. There is a core phenomenon in the stat.


The option in between core wrapped spandex yarn and covered yarn depends on the intended application. If the end-product requires a balance between strength and comfort, core wrapped spandex yarn is the better choice. On the other hand, if the end-product requires uniformity and consistency, covered yarn is the better option.


Core wrapped spandex yarn and covered yarn are 2 popular types of yarns that are utilized in the fabric industry. Each has its own advantages and drawbacks, making it important to pick the right type of yarn for the intended application. Whether you select core wrapped spandex yarn or covered yarn, it is important to ensure that the yarn meets the needed requirements for your end-product to satisfy your expectations.

Core Wrapped Spandex Yarn Manufacturing Process
 

These yarns are made by wrapping fibers around a central core. It is due to this reason that these are called core spun yarns. The core can be made of a variety of materials, spandex. Most commonly a filament is used as core material. Similarly, the fibers that are wrapped around the core can be made of any material, such as wool, cotton, or silk or any other synthetic staple fibers.


The core yarns can be produced using conventional ring spinning machine is used to produce most of the yarns used in different products. Therefore, the process is similar up to the formation of roving and feeding the roving to the drafting system or the ring frame. On ring frame, the fibers are first drafted, which means they are pulled out and elongated to make them thinner and more uniform. Then, they are combined with the core material where thin assembly of fibers get wrapped on the core. Instead of filament, a pre spun yarn can also be inserted within the core of the yarn to tailor the desired properties.

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Spandex in Manufacturing of Core-Spun Yarn

 

 

With day-to-day advancements in apparel and textile technology, the core-spun yarn has been catching attention for a while now. They comprise a continuous filament core and a spun yarn sheath over the yarn core. The yarn in core is usually spandex. Core spun yarns impart sought-after properties such as improved strength and elasticity, durability, and high abrasion resistance to the fabric. Quality and functionality of added spandex influence crucial factors while manufacturing and using the core-spun yarn.

 

● It shows excellent performance at different running drafts.

 

● The spools of our spandex run uniformly and also maintain a controlled lapping behavior during spinning.

 

● Owing to its high breakage resistance, it also increases the efficiency of the ring frame.

 

● It has high heat resistance that facilitates undergoing various temperatures during production.
Once the finished fabric is ready, its stretch and recovery properties keep adding to the garment's life even after several uses and washes.
A core-spun yarn can have multiple purposes for adding it to the fabric. Here are some properties spandex impacts:

 

● Adds to strength and breakage resistance: The core of a core-spun yarn determines its durability. Durability is a looked-after property because they undergo various processes that involve contact with metals and other objects that might weaken the molecular forces or even tear the yarn apart. Spandex has high strength, breakage resistance, and high resistance to chemicals, and it imparts the same to the core-spun yarn.

 

● Adds to stretchability: Spandex is known for its highly stretchable nature. The incorporation of core-spun yarns adds to the strength and stretchability of the fabric. The better the stretch properties, the more it is looked after. Our spandex has high stretch power that it retains even after multiple processes such as dyeing and rigorous washing.

 

● Adds to shape recovery: Since spandex stretches swiftly, it is equally crucial for it to gain its shape back after completing an action, and the movement of the body part is back to its original position. One of the active uses of core-spun yarns is denim, and we all love a comfortable pair of jeans that do not bulge around the knees. Spandex recovers actively and keeps the garments in their original fit for longer.

 

● Adds to wicking properties: Wicking refers to the transportation of moisture in the fabric. We all know the discomfort of wearing a garment that does not absorb and transports perspiration in humid weather. For that, our spandex comes to your rescue. It adds to the wicking properties of the core-spun yarn so that a wrong choice of spandex does not interfere with absolute comfort.

 
Core Wrapped Spandex Yarn Makes Denim More Flexible

The use of core wrapped spandex yarns in denim made denim more flexible and expanded its applications across industries. It has two components. The inner component is a core made of continuous filament yarn, usually spandex, and an outer spun yarn sheath covering the yarn core. The use of spandex as the yarn core imparts sought-after properties such as stretchability, durability, better resistance against breakage, among others. Here are some of the benefits of adding core wrapped spandex yarn to denim:

 

Adds to flexibility and stretchable: Pure cotton is not stretchable, and it tends to shrink after washing. Comfort is a crucial element in day-to-day use, and if we bring comfort into the equation, we require flexibility and stretchability. Spandex is a highly stretchable fabric. It can stretch to over five times its original length. So, adding a core wrapped spandex yarn with spandex at the core makes the denim fabric flexible and much more comfortable to wear.

 
 

Adds to breaking force: Cotton spun yarn is a staple fiber. Whenever it faces friction, it tends to break off easily. It results in the tearing of the fabric. Spandex adds to the elongation properties. So, if the denim has some amount of core wrapped spandex yarn in it, the chances of tearing off on facing friction reduces. It reduces the chances of filamentation and enhances the fabric's durability that is crucial in shoes, jeans, seat covers, and nearly everything made from denim.

 
 

Adds to shape recovery: Pure cotton denim comes with the risk of losing shape, especially around the areas that often move, like the knees. We all have faced bagging of jeans around the knees, and that might spoil the look of the entire attire. Well, not anymore. Spandex recovers or changes the shape as soon as the movement regains or changes its position, respectively. Adding a core wrapped spandex yarn containing spandex not only takes care of flexibility but also easy recovery.

 
 

Adds to wicking ability: Wicking means transportation of moisture within the fabric. The faster the movement of water moisture, the more is the wicking ability. Spandex has a high wicking ability, and it enhances the same for the denim it is added to in the form of core wrapped spandex yarn. Adding these yarns containing spandex makes jeans a good choice for humid or summery weather too.
These were a few properties that the use of core wrapped spandex yarns enhances in denim. A point to note here is that the properties that core wrapped spandex yarns impart to denim largely depend on the quality of spandex used.

 
Structural Characteristics of Core Spun Spandex Yarn

 

The core wrapped spandex yarn generally uses synthetic fiber filaments with good strength and elasticity as the core yarn, and is twisted and spun with short fibers such as outsourcing cotton, wool, and viscose fibers. Through the combination of outsourcing fibers and core yarns, they can make use of their respective advantages, make up for the shortcomings of both parties, and optimize the structure and characteristics of the yarn, so the core wrapped spandex yarn has the excellent performance of the filament core yarn and the outer short fiber.


The more common core wrapped spandex yarn is polyester-cotton core wrapped spandex yarn, which uses polyester filament as the core yarn and is covered with cotton fibers. There is also spandex core wrapped spandex yarn, which is a yarn made of spandex filament as the core yarn and outsourced with other fibers. Knitted fabrics or jeans made of this core wrapped spandex yarn stretch and fit comfortably when worn.


At present, the core wrapped spandex yarn has developed into many types, which can be summarized into three categories: Staple fiber and staple fiber core wrapped spandex yarn, chemical fiber filament and short fiber core wrapped spandex yarn, chemical fiber filament and chemical fiber filament core wrapped spandex yarn. At present, more core wrapped spandex yarns are generally made of chemical fiber filaments as the core yarn, which is a unique structure core wrapped spandex yarn formed by outsourcing various short fibers. The commonly used chemical fiber filaments for its core yarn include polyester filaments, nylon filaments, spandex filaments, etc. Outsourced short fibers include cotton, polyester cotton, polyester, nylon, acrylic and wool fibers.

 
Our Factory

Xiamen Lilong Spandex Co., Ltd was established in 2003, It specializes in the R&D and production of high-tech specialty fibers. Lilong company is the first spandex manufacturer in Fujian Province, which currently has more than 500 employees, with a total asset of 800 million yuan and covers an area of 130,000 square meters.
The company introduced complete sets of continuous spinning production technology. In May 2005, it officially commenced production, with an annual production capacity of 30,000 tons, The production line covers the main specifications ranging from 12D to 1680D. Over the years, Lilon has fully utilized its talent and technological advantages, continuously exploring and innovating in the field of high-tech special fibers. It independently developed high-temperature resistant, high-rebound, chlorine-resistant, phenol-resistant, and other differentiated spandex with stability. These products are widely used in textiles, clothing, woven tapes, and sanitary materials. Adhering to the spirit of "unity, positivity, development, and innovation", the company persists in the management policy of "promoting customer satisfaction with quality and meeting customer needs with innovation", winning customers and selling well worldwide.

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Certificate

 

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FAQ

Q: What is core wrapped spandex yarn?

A: Core wrapped spandex yarn is an elastic yarn formed by covering the elongated spandex yarn with the spandex yarn as the core, and wrapping the elongated spandex yarn with the filament or short fiber yarn in a spiral manner.

Q: What is the difference between core spun and covered yarn?

A: Spandex core-spun yarn is spandex wrapped with short fibers, with spandex as the core and non-elastic short fibers outside, and the core yarn is generally not exposed when stretched. Spandex covered yarn is spandex covered with chemical fiber filaments.

Q: What is core wrapped spandex yarn used for?

A: Core wrapped spandex yarns are often used in applications where durability and strength are important, such as industrial fabrics . They can also be used in applications where softness and comfort are desired, such as in knitwear and apparel

Q: What is the composition of core wrapped spandex yarn?

A: Chemical route to polyurethane polymer used in production of spandex. Spandex is mainly composed of a polyurea derived from the reaction of a diol and a diisocyanate. Two classes of spandex are defined by the "macrodiols".

Q: Is spandex a core yarn?

A: Core yarn uses spandex yarn as the core. Then we spin it out of one or several non-elastic short fibers (cotton, polyester cotton, acrylic, polyester, etc.) It is not exposed which can fully reflect the surface characteristics of the outer fibe.

Q: Why is core wrapped spandex yarn important to humans?

A: It is light and has high moisture wicking ability. It is also extremely stretchable and doesn't lose its elasticity with frequent use. What makes it the fabric of choice for athletes and gymnasts is it's low heat retention property and perfect body fitting ability without creating any pressure or tightness.

Q: What is the difference between core wrapped spandex yarn and staple spun?

A: The two main corespun constructions are polyester filament yarns covered and protected by polyester fibres or polyester filament yarns covered and protected by cotton fibres. Staple spun polyester threads are manufactured from high tenacity staple fibres.

Q: What are the advantages of core wrapped spandex yarn?

A: Core wrapped spandex yarn has two parts: the center and the sheath. Continuous filament yarn is often the core, with staple fibers serving as the sheath covering. The core-spun thread improves the fabric's functional attributes, including strength, durability, and stretch comfort.

Q: What happens if you heat core wrapped spandex yarn?

A: The high temperatures required for heat transfer can potentially damage the spandex material, causing it to melt or lose its elasticity. Therefore, while it is technically possible to use heat transfer on spandex, it is generally not recommended due to the risk of damaging the material.

Q: What is the melting point of core wrapped spandex yarn?

A: Spandex fibers are damaged at high temperature. The melting temperature for spandex is about 240°C. high temperature from washing bath and dryer causes more spandex break.

Q: What does hot water do to core wrapped spandex yarn?

A: Use cold water: core wrapped spandex yarn fabric is best washed in cold water. Hot water can weaken the elastic fibers, leading to loss of stretch and shape retention. The cold water helps preserve the integrity of the fabric while still effectively removing dirt and stains.

Q: Is core wrapped spandex yarn good?

A: Core wrapped spandex yarns are often used in applications where durability and strength are important, such as industrial fabrics . They can also be used in applications where softness and comfort are desired, such as in knitwear and apparel.

Q: Why is core wrapped spandex yarn so popular?

A: The stretchy properties of spandex allow it to stretch out and go right back to its original form. Because it stretches so well, a garment can be made from much less raw material than regular fabric.

Q: How is core wrapped spandex yarn manufactured?

A: The production of core wrapped spandex 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.

Q: How do you core wrapped spandex yarn?

A: Tie the core thread and wrapping yarn into a knot and secure to the bobbin leader. Begin spinning with S-twist (counterclockwise) so that you are core spinning opposite the direction that the wrapping yarn was spun. As you treadle, hold the wrapping yarn at a 90-degree angle to the core thread.

Q: What type of yarn is spandex?

A: Spandex or elastane is a synthetic fiber known for its exceptional elasticity. It is stronger and more durable than natural rubber. Because of its elasticity and strength (stretching up to five times its length), spandex has been incorporated into a wide range of applications.

Q: What happens if you tumble dry core wrapped spandex yarn?

A: Spandex: Spandex does not react well to heat, and therefore putting full spandex clothing, such as a bathing suit or leggings, into the dryer will caused the fabric fibres to weaken and break. Clothing that contains a small amount of spandex material, such as jeans, could be okay to put in the dryer.

Q: What happens if you tumble dry core wrapped spandex yarn?

A: Spandex: Spandex does not react well to heat, and therefore putting full spandex clothing, such as a bathing suit or leggings, into the dryer will caused the fabric fibres to weaken and break. Clothing that contains a small amount of spandex material, such as jeans, could be okay to put in the dryer.

Q: What are the positive effects of core wrapped spandex yarn?

A: Advantages: Lightweight and comfortable to wear, resistant to perspiration, has great elasticity, and is durable and strong.

Q: Is core wrapped spandex yarn better than cotton?

A: Cotton is a natural fabric that is soft, breathable, and easy to care for, while spandex is a synthetic fabric that is highly stretchy and elastic, but less durable. So, if you're looking for a stretchy fabric with good recovery, spandex may be the way to go.

As one of the most professional core wrapped spandex yarn manufacturers and suppliers in China, we're featured by quality products and competitive price. Be free to wholesale bulk discount core wrapped spandex yarn from our factory. Contact us for customized service.

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