This document discusses different types of sewing threads used in the garments industry of Bangladesh. It describes 6 types of threads: 1) Polyester corespun thread which has a polyester core and staple polyester cover, 2) Spun polyester thread made from spun polyester yarn, 3) Staple spun cotton thread made from spun cotton yarn, 4) Textured polyester thread made from crimped polyester filament, 5) Polyester cotton corespun thread with a polyester core and cotton cover, and 6) Trilobal polyester thread made from triangular shaped polyester fibers. For each type, it provides details on composition, characteristics, and common uses.

2. Southeast University
Department Of Textile
Engineering
I/A 251,252 Tejgaon Dhaka Banglade sh
prepared by : Mazadul Hasan sheshir

3. Sewing Thread
Types of Sewing thread being used in the garments
industry of Bangladesh
1.Polyester Corespun Thread
2.Spun Polyester Thread
3.Staple Spun Cotton Thread
4.Textured Polyester Thread
5.Polyester Cotton Corespun Thread
6.Trilobal Polyester Thread

4. Sewing Thread (Contd.)
1.Polyester Corespun Thread:
This type of thread is produced by spinning staple
polyester fibre around a core of high tenacity continuous
filament polyester in yarn-spinning operation. Two or
more of these composite yarns are then twisted together
to give the necessary size and tensile strength.
e.g. Epic(Coats).
Uses: Mainly used in topstitching of shirts, blouses,
trousers, sportswear , jeans & work clothes.

5. Sewing Thread (Contd.)
Key Characteristics:
-
Exceptionally strong.
-
The continuous filament core (Having high tenacity)
provides superior strength while the staple polyester
cover helps to protect the inner core from damage due to
needle heat.
-
Its resistance to abrasion helps ensure long seam life in
a wide variety of materials.
-
Fine threads can be used for delicate fabric without
compromising on strength, thereby avoiding problems
like seam pucker.

6. Sewing Thread (Contd.)
2. Spun Polyester Thread:
Staple polyester fibres are spun into polyester yarn. Then
two or more of spun polyester yarns are twisted together to
produce spun polyester thread.
e.g. Astra (Coats)
Key Characteristics:
-
High tenacity of polyester ensures greater strength and
thereby high abrasion resistance.
Very least amount of shrinkage (less than 1%) compared
to cotton thread.
Uses: Mainly for overedging. Also used for general seaming
of shirts, trousers, knitwear, jackets, blouses etc.

7. Sewing Thread (Contd.)
3. Staple Spun Cotton Thread:
Normally long staple cotton fibres are spun into cotton yarn.
Then two or more ply of spun cotton yarn are twisted
together to produce spun cotton thread.
e.g. dymax (Coats)
Key Characteristics:
-
-
100% cotton thread have relatively low strength and
elongation compared to those in synthetic thread ,
therefore they need relatively light sewing tension and high
stitch densities.
Very high amount of shrinkage compared to synthetic
thread.

8. Sewing Thread (Contd.)
3. Staple Spun Cotton Thread:
- During sewing , cotton thread is not damaged at high
temperature generated by needle.
- 100% cotton thread is mercerized (treatment with caustic
solution under tension) to provide greater luster and higher
strength.
Uses: Mainly used in sewing cotton garments that are to be
post dyed.

9. Sewing Thread (Contd.)
4. Textured Polyester Thread:
Made from textured continuous polyester filament.
(Note- texturing means modification by applying crimp to the
filament) . e.g. Gramax (Coats).
Key features:
- Provides high softness and comfort.
- High extensibility and seam strength enhance higher seam
security.
Uses: Mainly used in “next to the skin” seams for high
softness .e.g. underware, swimwear, babywear etc.
Also widely used in overlocking and covering stitches for high
extensibility and seam security.
-

10. Sewing Thread (Contd.)
5. Polyester Cotton Corespun Thread:
- Made of polyester filament in the core and staple cotton
fibre which wraps polyester filament. Two or three plies of
this yarn are twisted together to make thread.
e.g. dual duty (Coats).
Key features:
- This thread has been developed to improve the properties
cotton and to get the opportunities of both cotton and
polyester fibre.
- Very low shrinkage, good strength and cotton core protects
poly core from needle heat and high ironing temperature.
Uses: fine cotton denim shirts , outdoor wear etc.

11. Sewing Thread (Contd.)
6. Trilobal Polyester thread:
- Newly developed polyester fibre to improve the dullness of
usual polyester fibre.
-Trilobal poly is a multiple filament, twisted, high-sheen
continuous fiber thread. It has the bright appearance of
rayon or silk. Triangular shaped fibers reflect more light
and give an attractive sparkle to textiles.
Uses: embroidery for garment.