In fact, the difference between polyester sewing thread and nylon sewing thread is very obvious, as described below: Polyester filament sewing thread, also known as polyester fiber, has good breathability and moisture wicking, as well as strong acid and alkali resistance and UV resistance. Generally, the multiples of 75D fabric are polyester, such as75D, 150D, 300D, 600D, 1200D, 1800D, etc. The surface of polyester is darker than nylon and slightly rough.
Nylon sewing thread, also known as nylon sewing thread, is polyamide fiber. The thick nylon thread has high strength, abrasion resistance, chemical resistance, good deformation resistance and aging resistance. Generally, the multiples of 70D fabric are nylon, such as70D, 210D, 420D, 840D, 1680D, etc. The surface of nylon has higher glossiness and smoother feel.
In general, the materials used for making bags are nylon Oxford cloth. A simple method to distinguish nylon filament thread and polyester sewing thread is to use the burning method.
For nylon, it will quickly shrink and melt into white glue-like substance when close to the flame. It will melt and foam when burning, with no obvious flame. It is difficult to continue burning when leaving the flame, and it will emit a celery smell. The melted material will turn light brown after cooling and is not easy to crush.
For polyester, it is easy to ignite. It will melt and shrink into a mass when close to the flame. It will melt and emit black smoke with yellow flames when burning. It will emit a fragrant smell. After burning, it will leave a black-brown hard block that can be crushed with fingers.
In addition, the feel will also be different, with polyester feeling rougher and nylon feeling smoother. Additionally, the scraping method can be used for differentiation. After scraping with a fingernail, obvious marks are left for polyester, while the marks are not obvious for nylon.