Nylon Apron Block Identify Ways
1、Density method: check the density of all kinds of plastic, with liquid medium, test its ups and downs in the plastic in liquid medium, to discern rough plastic categories, such as a piece of plastic on the water, float on the surface of the water can be concluded that the raw material is not PVC (due to the density of PVC > 1).
2、Burning method: mainly examines the color of the flame and burning smell and smoke, in general, the raw material of polyolefins combustion flame is blue or light blue, mild smell and light, with a white smoke, whereas most of the raw material with benzene or chlorine after burning smoke, strong smell. In addition, such as PE, PP dripping phenomenon, and PVC, etc, no burning, but have self-extinguishing phenomenon.
3、Optical method: mainly examines the tran***rency of raw material, usually used tran***rent materials: PS, PC, PMMA, AS; Translucent material: PE, random copolymerized PP, homopolymerization, tran***rent ABS, PP, soft PVC other largely opaque materials.
4、Color distinguishing method: generally speaking, do not add fertilizer raw material, if itself contains double bond, the color will show slightly yellow, such as ABS, with butadiene copolymer, polymer after polymerization still contain a double bond, so will show slightly yellow.
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