1. Polyester 

 POLYESTER features are favorable permeability and moisture exclusion.There is a strong acid and alkaline, anti - uv capacity.Generally 75D multiple cloth for polyester, such as 75D, 150D, 300D, 600D, 1200D, 1800D are polyester, fabric appearance than nylon dark, rough.

2. Nylon 

polyamide fiber.The advantages are high strength, high wear resistance, high chemical resistance and good deformation resistance, aging resistance.The disadvantage is that the hand is hard.One of the more famous is PERTEX, CORDURA.The general 70D multiple of the cloth is nylon, such as 70D, 210D, 420D, 840D, 1680D are nylon material, cloth gloss is relatively bright, feel relatively smooth.Generally speaking, what make bag is nylon Oxford cloth, the difference between nylon and polyester is the simplest combustion method!Dacron take off very flourishing black smoke, nylon take off white smoke, and is to see the burning residue, dacron pinch will break, nylon into plastic!Nylon is twice as expensive as polyester.Nylon, near the flame is quickly rolled into a white gelatinous form, in the flame melting drop and bubble, no flame when burning, leaving the flame difficult to continue to burn, emitting celery taste, after cooling light brown melt is not easy to grind.Dacron, easy to ignite, near the flame melting shrinkage, burning while melting black smoke, yellow flame, emitting aromatic smell, burned ashes for black brown hard, with fingers can be broken.

In addition, nails can be used for scraping. After nails are scraped, the obvious trace is tapetum, while the non-obvious trace is nylon. However, this method is not as intuitive and easy to identify as the first method