The most direct method of distinguishing pure wool felt and chemical fiber felt
The raw materials of pure felt and chemical fiber felt are wool. The most straightforward method of identification is to remove some of the wool from the felt and ignite it with fire. The wool flies during the combustion process and is accompanied by a foaming state. The burning matter has burning hair. taste. Burned ash is black brittle, no coke, no chemical fiber felt. From the surface observation, the pure felt products and the chemical fiber felt are soft, flexible, and finely textured. Relatively speaking, chemical fiber felts are made of a mixture of wool and chemical fiber, which is lower in price than pure felt. Its performance has the characteristics of pure felt insulation, softness and so on. The chemical fiber felt can also be used to distinguish the specific gravity of its raw materials by the burning taste and ash, and it can not be considered as the top grade in terms of feel. The default number of the mat is T and the density of the felt is g/cm3. If the density is too high, the elasticity will be inelastic. If the density is too small, the wear resistance will be reduced. Different materials must be selected for different uses. The key to distinguish between felt and general felt is to distinguish the density, thickness, gloss, strength of the hair and elongation of the hair. Felt number is composed of product color + raw material category + variety + density + density five-digit number. When ordering felt, it should be numbered according to the standard, providing the area, thickness and drawings of the required product, etc.