here are key differences between cotton thread and polyester thread. Cotton thread is a little bit stronger than polyester thread and a lot softer. This makes it ideal for sewing a canvas bag, especially a washed canvas bag. The lack of stretch in cotton thread also makes it ideal for quilting décor on bag because they won’t lose their shape. Polyester thread has a little bit of stretch to it, so sometimes a bag would be made with polyester or nylon thread.
Cotton Threads
- Cotton Thread- 100% cotton thread that is still silky smooth which makes it easier for the worker to sew bags using cotton thread. Most of the canvas bag in our factory is made with cotton thread to ensure the strength of bag and productivity of factory. One more tips about cotton thread, amongst many different cotton threads, mercerized cotton or Egyptian cotton goes through a specialized process that makes natural fibers more luminous and stronger. This thread is ideal for all sewing projects because it is strong and easy to work with.
- 100% Cotton Silk-Finish- ideal for sewing cotton and especially piecing and quilting since it is high strength and non-shrink; has a natural shine and is extremely soft. This thread is seldom used on making canvas bag but more in garment industry.
- Fine Machine Embroidery Thread- perfect for any embroidery project, on batiste, tulle, linen, cotton, toweling, and more.
Polyester Threads
- Metrosene Plus Polyester Thread- makes smooth seams, and can be used on cotton, synthetics, mixed textiles, silk, or linen
- Polysheen Polyester Thread- ideal for quilting since it is stronger than rayon
- Metallic Thread- perfect for machine or hand embroidery, adds a metallic glow
- Overlock Thread- this thread is best for serge since it resists breakage and provides consistent tension
Thread Sizes and Weights
- Thread size is determined by the length of a thread needed to weigh a specific number. This means that the higher the size number, the finer the thread.
- Fiber count of a thread is the amount of individual strands makes up the string of thread as a whole.
- Typically, if a fiber count is not provided, it is 2 or 3 ply.