DEFECTS OF CIRCULAR KNIT FABRIC AND THEIR REMEDIES

 

The major defects in Knitted fabrics be it flat knit or circular knit are as below:
1. Barre
2. Streakiness
3. Imperfections
4. Contaminations
5. Snarling
6. Spirality
7. Spandex Jump
8. Spandex miss

1. Barre

Barre is a defect observed in widthwise direction, broad in nature with equal interval over length of fabric

Causes:  

• High Yarn Tension
• Count Variation
• Mixing of the yarn lots
• Package hardness variation

Remedies:

• Ensure uniform Yarn Tension on all the feeders.
• The yarn count CV. should be less than 1.2
• Ensure that the yarn being used for Knitting is of the same lot
• Ensure that the hardness of all the yarn packages is uniform using a hardness tester.

2. Streakiness

Streaks as the name suggests are horizontal line which appear in fabric, they are irregularly spaced and can be of various sizes

Causes:

• Faulty winding of the yarn packages.
• Yarn running out of the belt on the Pulley

Read more about DEFECTS OF CIRCULAR KNIT FABRIC AND THEIR REMEDIES

Source: https://www.inviya.com/blog/defects-of-circular-knit-fabric-and-their-remedies/

 

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BENEFIT OF USING INVIYA® IN CIRCULAR KNIT FABRIC

Circular knit fabric with INVIYA® can be used in a varied range of clothing from fashion wear to active wear/ athleisure. The prime requirements of fabrics for these garments are: comfort, recovery, stretch, strength – and these are the qualities which define INVIYA®.

To make this possible  INVIYA® is made into an adaptable yarn which is suitable for making different types of circular knit fabrics.

This is done by using INVIYA® on various makes of circular knit machines as per the requirement.  INVIYA® can be used on all available machines by using various attachments and feeders, which are readily available in market.

The process of making a long lasting and comfortable knit fabric starts when,  INVIYA® – a bare spandex filament yarn is introduced in the circular knitting machine during the process of circular knitting through the spandex feeding mechanism along with the hard yarn (which can be cotton, polyester, nylon or blend of the mentioned fibers) at a pre-determined levels of draft.

Read more on various properties of  INVIYA® 

Source – https://www.inviya.com/blog/benefit-of-using-inviya-in-circular-knit-fabric/

TYPES OF CIRCULAR KNITTING MACHINES

Circular Knitting Machine: In this machine the needles are implanted on a circular cylinder, which when used creates a seamless tube of fabric, by joining the stiches from the needles.

Double Jersey Machine: Double jersey machines have two sets of needles; one on dial and as well as on cylinder. There are no sinkers in double jersey machines.

This double arrangement of needles allows the fabric to be manufactured which is twice as thick as the single jersey fabric, known as double jersey fabric

Read about all 8 Types of Circular Knitting Machines 

Source – https://www.inviya.com/blog/circular-knitting-machines/

ROLE OF SPANDEX IN COMPRESSION WEAR

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Compression wear is used in medical to sportswear garments. In medical area compression garments prevents risk of deep vein thrombosis, varicose veins, healed venous ulcer etc.

While in sports it is commonly worn by athletes and people doing exercise to prevent chafing and rashes.

Compression wear are a type of garment that fit tightly around the skin, while simultaneously exerting pressure on the area worn on.

The major composition of a compression wear garment is spandex fiber.

Click here to read more.

 

Source:https://www.inviya.com/blog/role-of-spandex-in-compression-wear/

SPANDEX DRY SPINNING METHOD

dry-spinning-blog

Dry spinning is the most efficient and widely used way of manufacturing spandex filament. At Indorama Industries Limited we have since the beginning used “Dry-spinning” to manufacture our spandex yarn.

In simpler terms “Dry spinning” of spandex is explained as below:

1.  In this process initially raw materials are dissolved together to form a solvent which is then used for further process. The dissolution takes place in presence of a volatile solvent, which evaporates when heat is applied to it

2. The solution produced from above step is then filtered to make it suitable for further processing

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Soruce: www.inviya.com/blog/spandex-dry-spinning-method/