Core-spun Yarn in Denim

We all look for that one perfect pair of jeans in our wardrobes. And what makes it irreplaceable for us is its fit and comfort. And not just that. Today, apart from clothing, we see the use of denim in multiple industries, such as home decor, stationery pieces, and car furnishing. We have witnessed denim go from non-stretchable cotton fabric to highly flexible core-spun denim. Yes, that’s right. Pure denim is a hundred percent cotton fabric. Remember the jeans from the early 2000s? They mostly comprised pure denim.

The use of core-spun 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-spun yarn to denim:

1. Adds to flexibility and stretchable: Pure cotton is not stretchable, and it tends to shrink after washing. However, 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-spun yarn with spandex at the core makes the denim fabric flexible and much more comfortable to wear.

• Adds to breaking force: Cotton is a staple fiber. So, whenever it faces friction, it tends to break off easily. It results in the tearing of the fabric. As discussed, spandex adds to the elongation properties. So, if the denim has some amount of core-spun 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. So, adding a core-spun 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-spun yarn. So, 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-spun yarns enhances in denim. A point to note here is that the properties that core-spun yarns impart to denim largely depend on the quality of spandex used. We, at Inviya, manufacture 4th generation spandex which is suitable for manufacturing core-spun yarns owing to its better elongation, better frictional properties, high heat resistance, and high stretch power.

I WAS BORN FREE, MY CLOTHES CHAINED ME. – ANONYMOUS

The very antithesis of what someone said above, is Spandex.

Mere presence of Spandex in what you wear ensures that your clothes are just like your extended skin. Also known as Elastane [Europe], it has a versatile and amazing functionality of engineering fabrics with desired elasticity and strength.

At the basic level, one should know that Spandex is underneath the covering yarn, therefore covering yarn material surface will influence the running performance. Typically the covering yarn is Core Spun Yarn (CSY), Single Covered Yarn (SCY), Double Covered Yarn (DCY) and Plied Yarn, and Air covered Yarn (ACY).

Most important requirement for a stretch garment is that apart from Body comfort and fit, it has a natural appearance and recovery from elasticity. While allowing freedom of movement, it shall be breathable and durable. How and where a stretch garment is to be used depends largely on the degree and direction of elasticity, it provides.

The inherent benefits related to Spandex, ensure that it has not only Lifestyle applications, but also has vast and varied technical textile applications. It is used in Sportswear, stretch denim, Bottom wear, Swimwear, Tops [Shirting and Blouses], Intimate wear, Undergarments, Diapers, Socks and leggings.

Spandex has come as a boon to the medical industry with its usage being far and wide across Personal Hygiene [eg. Diapers, training pants], Surgical hose, Surgical Gloves and many more.

Moving beyond the conformist applications, Spandex has made other industries also notice its versatility and is now being widely used in Home Furnishing, Car Upholstery, Cables etc.

It is this cross-category applications of Spandex that the market in seeing a lot of action world-over, in its efforts to introduce innovation and newness, in the most cost-effective way.

India, currently consumes around 6000MT/Year (100% imported) of Bare Spandex. However, against a global growth of 7%, India is growing at 12-14% per annum in its Spandex consumption, led by the growth in organized retail, branded clothing, high GDP growth rate and a relatively positive consumer sentiment. We clearly see the market growing exponentially in coming years as consumers spending power goes further North, their aspirations and lifestyle drives them to seek more and seek better, which is what Spandex imparts. It empowers your clothes with Better and More of you.

WHY USE INVIYA® SPANDEX IN MANUFACTURING CORE SPUN YARN?

Manufacturing Core Spun yarn is no easy task. Every detail has to be kept in strict check throughout the process on ring frame to manufacture quality Core Spun Yarn. So, how using INVIYA^® spandex does helps in making this process a bit easier is given as below.

1. INVIYA^® easily runs on various drafts and has a wide draft range for running on ring frame
2. All the spools of INVIYA^® have uniform run-ability, which ensures that you get the same quality from start to end of a particular spool
3. We have made sure that INVIYA^® spandex has controlled/ reduced lapping behavior to maintain the utmost quality of the final required yarn
4. INVIYA^® has the ability to run at high speed on ring frame without causing breakages, thus increasing the efficiency

After Core Spun yarn is made, mainly woven fabric is made out of this yarn. So, at Indorama Industries Limited we keep in check the various quality requirements for the quality fabric to be produced from Core Spun yarn which is infused with INVIYA^®, some of these key quality checks are mentioned below:

1. Balanced load and unload power of INVIYA^® ensures that the stretch and recovery in finished fabric is maintained
2. INVIYA^® spandex can hold up to high heat set temperature applied during heat setting process on different Stenters without affecting it’s properties
3. INVIYA^®’s robust nature helps in keeping its properties intact even after several rigorous processes and washes by which a fabric goes during the processing stage

Source: https://www.inviya.com/blog/why-use-inviya-spandex-in-manufacturing-core-spun-yarn/

 

Defects in Core Spun Yarn

1. Grin-Through — This defect is an incomplete covering of the core of spandex and is caused by improper positioning of the core with respect to roving.
2. Short core voids — This defect comes in short sections (25 to 75 mm) of yarns with no stretch because the core broke after the yarn was spun. This may happen due to poor positioning of spandex yarn to roving, over-drafting of core yarn (use recommended drafts), poor mechanical condition of rings, excessive traveller speed, and too heavy traveller
3. Long core voids — It is long section of yarn with core missing. This defect may arise due to nicked or rough guide surfaces, back drafting of spandex on the tube resulting from insufficient feed-roll contact, over drafting of core yarn and mishandling of spandex supply tubes.

Click Here to know more about Defects in Core Spun Yarn

Source: https://www.inviya.com/blog/defects-in-core-spun-yarn-2/

Core Spun Yarn: A Fibre with Versatile Applications and Extra Strength

While each trend brings along a new colour, Yarn seems to occupy the centre stage by shaping the look and transforming a fashion statement. With the Core Spun Yarn replacing the conventional fibre, we answer the know how’s of the more dramatic fibre.

What is Core Spun Yarn?

Core spun yarn or ‘poly core’ is created by wrapping or twisting a secondary yarn around a base yarn, where usually central filament core is made of polyester for the extra strength. Its structure consists of Core and sheath where the core adds to the strength, life and elasticity of the fabric.

Why is it gaining popularity?

STRENGTH

It is 40% to 50% stronger than normally spun yarn of the same weight offering higher tenacity along with superior abrasion resistance & durability.

SUPERIOR SEWABILITY

Can be used in both manual and automatic machines with minimum interruptions i.e. fewer re-stitched seams, minimizing seam Failure.

UNIQUE PROPERTIES

When wet, the sheath expands, and while stitching it fills the stitch holes, creating a waterproof seal. This property is makes it best for weatherproof covers and sails, along with boots, greatcoats, jackets and tents. Also, when it is passed through the sewing machine needles at a high speed, while the temperature is high enough to melt the core, its cotton sheath prevents melting.

INVIYA with its range of freedom fibre offers INTIMATE wear, ACTIVE wear; FASHION wear and SWIM wear products with this magical fibre. While it promises the comfort along with new age fashion, the brand promises to have something amazing for everyone checking out the collection. Be it the fabric or the trending colours, style with comfort is the most sought after combination which would never go out of vogue!