Sunday, April 23, 2017

Different Types of Sewing Threads and Their Uses

Sewing threads are manufactured by twisting staple fibers or by continuous filaments yarns. At times two or more yarns are combined to make the thread to get the required strength. There are various factors depending on general and specific end uses, which when carefully analyzed can help in better selection of appropriate thread for sewing apparel to achieve optimum performance. Factors like type of seam, stitch type, stitches per inches, sew-ability, loop strength, linear seam strength, type of material being sewn, type of sewing machines, elongation, shrinkage, abrasion resistance, color fastness and resistance to chemicals, heat light conditions under which the product must perform; normal life of the product; and cost effectiveness etc. must be considered while selecting sewing thread.
Different types of sewing threads
Fig: Different types of sewing threads
Different types of sewing threads used in apparel manufacturing:

1. Air entangled thread:
Air entangled thread is made from continuous filaments of polyester that are entangled as they pass through a high pressure air jet. This yarn is when twisted, dyed and wound on cones with lubricant. Air entangled threads are used in everything from seaming flags to heavy denim jeans.

2. Core spun thread:
Core spun thread is made by spinning a wrap of staple cotton or polyester around continuous filament of polyester fibers. Two or more of these single yarns are twisted together to form the thread. Core threads have fuzz on their surface giving them good lubricated characteristics and also a continuous filament core that contributes to high strength and durability. When wrapped with a cotton wrap, core threads have very good needle heat resistance. When wrapped with a polyester wrap, core threads have excellent chemical resistance and color fastness.

3. Mono-cord thread:
Mono-cord thread is made from continuous filaments of nylon that have been bonded together with very little twist so that they look like a single cord of yarn. These threads appear to be flat and ribbon-like, which provides a high degree of resistance of abrasion and strength. Mono-cord threads are used in the manufacturing of shoes and other heavy duty applications.

4. Monofilament thread:
Monofilament thread is produced from a single nylon continuous filament. It is translucent and can be blend well with many colors. Since it is a single filament, it may unravel easily if the thread is not locked in the seam adequately. Most common use of monofilament threads is in quilting operations on quits and blind stitch operations for hems in apparel.

5. Spun thread:
Spun thread is made from cotton or polyester staple fibers that are spun into single yarns and them two or more these yarns are piled to make a sewing thread. Spun threads are round threads and have fuzz on their surfacing giving them a soft hand and good lubricate characteristics. These threads have good sewing performance with good dimensional stability.

6. Textured thread:
Textured thread is made from continuous filaments of polyester or nylon that have been textured and then heat set to insure proper bulk retention. These threads have high extensibility and good elastic recovery. Textured threads are ideas for over edge, chain stitch and overstitch of the finished seam and offers good seam elasticity for garments like swimwear, children wear, performance wear etc. Textured threads are typically used in the loopers of a serge or over locker.

7. Twisted multifilament thread:
Twisted multifilament thread is made from continuous filaments of polyester or nylon that are twisted together into a cohesive bundle and then plied to make the thread. They are then dyed, stretched and heat set to achieve the desired physical characteristics like abrasion resistance and durability. These threads are used in performance wear and automobile upholstery. 
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