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How to distinguish PA+nylon,PP+PE,PP+PET copolymer? 
update:2020-7-1 16:56:12
PA + nylon copolymer
Sensory identification: The taste of this product is very similar to LDPE. Combustion identification: the burning flame is yellow and blue, smokeless when burning, has the smell of paraffin wax, molten dripping, easy to draw wire but different from LDPE is the smell of hair burning when burning, after burning, it is pale yellow. Note: Nylon copolymer can not be used for regeneration granulation, to be strictly distinguished from LDPE but also strictly controlled in the bulk content.

PE + PP copolymer
Sensory identification: compared with LDPE, the transparency of this product is much higher than LDPE, and there is no difference between the handle and LDPE. The tear test is very similar to PP film, and the quality is pure and transparent white. Combustion identification: the flame is all yellow when burning, melting dripping, no black smoke, smell like oil.

PP + PET copolymerization
Sensory identification: looks like PP, high transparency, rubbing sound is greater than PP. Combustion identification: there is black smoke when burning, the flame has jumping fire phenomenon, the burning surface is black carbonization.

PE + PET composite membrane
Sensory identification: the surface of the material is smooth on one side and not smooth on the other, white and transparent. Combustion identification: it is similar to PET when burning, without melting dripping phenomenon, black carbonization on the burning surface, black smoke, jumping fire phenomenon, with the smell of PE paraffin

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