LDPE (Chinese name: low density high pressure polyethylene): Sensory identification: soft hand: white transparent, but the transparency is general, often with tape and printed words. (Note: tape and printed characters are unavoidable, but must be controlled, as these will affect the market.) Identification of combustion: yellow and blue on the burning flame; smokeless when burning, smell of paraffin, molten droplets Fall, easy to draw. KN95 Face Mask,Disposable KN95 Masks,95% Filtration Mask,KN95 Civil Mask Ningbo Jiashang textile co., LTD., , https://www.cn-jshang.com
EVa (Chinese name: Polyethylene-ethyl acetate): Sensory identification: soft surface; tensile strength is stronger than LDPE, feel sticky (but no glue on the surface); white transparent, high transparency, sensory and feel with PVC film Similarity should be noted. Identification of combustion: The same smell of paraffin wax as LDPE when burned is slightly sour; the burning flame is yellow and blue; it is smokeless when burned. Melt dripping, easy to draw. Note: This product is one of the PE types, the same as LDPE, can be used for regenerative granulation, the quality requirements are the same as PE.
PP (polypropylene): Sensory identification: This product is white transparent and has higher transparency than LDPE. Identification of combustion: When burning, the flame is yellow and blue, smells like oil, melts and drops, and there is no black smoke when burning.
PET film (polyester) Sensory identification: This product is white and transparent, feels hard, and has a sound when it is smashed. Appears like PP. Identification of combustion: There is black smoke when burning, and there is a flashover phenomenon in the flame. After burning, the surface of the material is black carbonized, and the black charcoal after burning of the fingers is powdery.
PVC film (polyvinyl chloride) Sensory identification: Appearance is very similar to EVA but elastic. Identification of combustion: black smoke when burning, extinguished from fire, the burning surface is black, no melting dripping phenomenon.
Nylon copolymer (LDPE + nylon): Sensory identification: This product is very similar to LDPE. How does combustion identification distinguish between HDPE and LDPE waste plastics? The burning flame is yellow and blue, smokeless when burning, has the smell of paraffin, melts and drops, and is easy to draw, but unlike LDPE, it has the smell of burning hair when burning, and it is pale yellow after burning. Note: Nylon copolymers should not be used for regenerative granulation. Strictly distinguish them from LDPE and strictly control the content in large parts.
Sensory identification of PE+PP copolymer: Compared with LDPE, the transparency of this product is much higher than that of LDPE. There is no difference between hand and LDPE. The tear test is very similar to PP film, and it is transparent and pure white. Combustion identification: When the product is burned, the flame is all yellow, melted and dripped, no black smoke, and the smell is like oil.
Sensory identification of PP+PET copolymer: Appearance is like PP, the transparency is very high, and the sound is louder than PP. Identification of combustion: There is black smoke when burning, the flame has a flashover phenomenon, and the burning surface is black carbonized.
Sensory identification of PE+PET composite film: the surface of the material is smooth and not smooth, and the white is transparent. Combustion identification: burning like PET, no melt dripping phenomenon, burning surface black carbonization, black smoke, flashover phenomenon, with the paraffin smell of PE. Price price