Telephone Threads

Telephone threads are embroidery yarn- 100% Rayon Filament or Trilobal Polyester Yarn. The count is 100 D /2 ply to 180D/2 ply. Generally 100D/2ply or 120D/2 ply is used for single hand powered embroidery machines.

Fabric Used in the Pockets of Shorts, Capris or Trousers

The fabric used in the pockets of shorts, capris or trousers is sheeting ( 30s)

Texturing of Polyester

Texturising is a process to develop the warmth properties of synthetic by increasing the bulkiness of yarn. A basic discussion on texturing can be viewed here.

To know more about the business of a texturising unit, one can view the draft prospectus of a company which was filed to the Security and Exchange Board of India here.

Specifications of a draw texturing machines can be viewed here.

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Spirality and Skew in Single Jersey- Causes and Remedies

This question is posted in a discussion by one of the readers:

I need a solution to control the skew and spirality of single jersey 160g with 30/s. Please provide me with some solution 

Spirality is a dimensional distortion in circular knitted fabric. Spirality is bad as it leads to displacement of seams and mismatched patterns. It can also leads to sewing difficulties. The major cause of spirality is the twist in roving and yarn. To minimize spirality, Z-twist yarns should be knotted on clockwise rotating machine and S-twist yarns on counter clockwise rotating machines. Tighter Fabics exhibit less spirality compared to looser fabrics which means that finer gauge machines will reduce spirality.

It can also be reduced by setting the twist either by autoclave treatment, yarn dyeing or using balanced plied yarns. 

For more information SITRA has a nice Technical brief here

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