Thread for jeans

Sewing thread for jeans

1.What does Core Spun Yarn mean?

Poly Poly Core spun yarn , made by wrapping a staple polyester wrapper around a continuous filament bundle of polyester fibers during spinning, and then plying these yarns into a sewing thread. The continuous filament polyester core makes up approximately 65% of the thread construction.

Rawr Denim explains Core Spun Yarn

Core spun, or “poly core”, yarn is created by twisting staple fibers around a central filament core, usually made of polyester for extra strength.
It is 40% to 50% stronger than normally spun yarn of the same weight, and reduces the number of broken stitches when sewing seams and hems on denim.

Additional Resources

Diagram of core spun yarn:

★ Our staple fibers is 38MM,it is come from Japan toray brand .
★Our long fiber have 50D,75D,100D etc.All oftension strengtht are over 8 gram per denier

2. This core contributes to:

Higher strength per size (higher tenacity)
Greater uniformity in size, strength and other physical characteristics•
A higher initial modulus or resistance to stretching contributing to better loop formation and reduced seam puckering.
Better ply security – fewer unravel type thread breaks
Superior abrasion resistance & durability

3.The application of core spun yarn:

1.      Use for thread factory
2.      Use for book binding
3.      Use for cotton quilted products.

4. The dyeing process（core spun yarn VS spun polyster yarn）

The Poly wrapper contributes to :
o Superior color fastness, chemical and abrasion resistance
o Higher strength than cotton wrapped core spun threads
o Superior “union dyeing” because of one-step dyeing process

5.Breakage of Core Spun Yarn v.s. Spun Poly Yarn:

6.Specification

NE:24S/2,26S/2,28S/2,302,352,362,382,402,502,552,572,602,702,802,etc.

Core Spun Vs Spun Polyester Yarn – Technical Specifications

Here are some technical specifications of two yarns from the same company – one Core Spun and the other Spun Poly – to find out some differences between the two.