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    A simple identification method of waste plastics

    selfurl:http://en.jingxiongsj.com/news347158.html   begintime:2020-04-07 10:06:00

    Simple identification method of waste plastics in plastic machinery factory


    LDPE (Chinese Name: LDPE):


    Sensory identification: soft hand: white transparent, but general transparency, often with tape and printed words. (Note: tape and printed words are inevitable, but the content must be controlled, because these will affect the price in the market.)


    Combustion identification: the flame is yellow and blue; smoke-free when burning, with the smell of paraffin, melting and dripping, easy to draw.


    EVA (Chinese Name: Polyethylene acetate):


    Sensory identification: the surface is soft; the stretching toughness is stronger than LDPE, and the hand feels sticky (but there is no glue on the surface); it is white and transparent, with high transparency. The sense and hand feel are very similar to PVC film, so attention should be paid to distinguish. Combustion identification: it has the same smell of paraffin as LDPE, slightly sour; the flame is yellow and blue; it is smoke-free during combustion. Melting and dropping, easy drawing. Note: This product is one kind of PE, the price is the same as LDPE, it can be used for regeneration granulation, and the quality requirements are the same as PE.


    PP (polypropylene):


    Sensory identification: compared with LDPE, this product is white and transparent, with high transparency and sound when kneading. Combustion identification: when burning, the flame is yellow and blue, the smell is like oil, melting and dripping, and there is no black smoke when burning.


    PET film (polyester):


    Sensory identification: the product is white and transparent, with hard hand feel, and there is sound when rubbing. It looks like PP. Combustion identification: there is black smoke when burning, and there is a phenomenon of flame jumping. After burning, the surface of the material is black carbonized, and the black carbonized substance after burning is rubbed by fingers, and the carbide is in powder form.


    PVC membrane (PVC)


    Sensory identification: it looks like EVA but has elasticity. Combustion identification: it emits black smoke when burning and extinguishes when leaving the fire. The combustion surface is black without melting and dripping.


    Nylon copolymer (LDPE + nylon):


    Sensory identification: This product is very similar to LDPE. Combustion identification: the flame is yellow and blue, smoke-free when burning, with the smell of paraffin, melting and dripping, easy to draw, but different from LDPE, it has the smell of hair burning when burning, and it is light yellow after burning. Note: nylon copolymers can not be used for regeneration granulation. It should be strictly distinguished from LDPE and strictly controlled in the content of large parts.


    PE + PP copolymer


    Sensory identification: compared with LDPE, the transparency of this product is much higher than that of LDPE, and there is no difference between hand feel and LDPE. Tear test is very like PP film, so the quality is transparent and pure white. Combustion identification: the flame of this product is all yellow when burning, melting and dripping, no black smoke, smell like oil.


    PP + pet copolymer


    Sensory identification: it looks like PP, with high transparency. When kneading, the sound is greater than PP. Combustion identification: there is black smoke during combustion, the flame has the phenomenon of fire jumping, and the combustion surface is black carbonization.


    PE+PET composite film


    Sensory identification: the surface of the material is smooth and not smooth, white and transparent. Combustion identification: it looks like pet when burning, without melting and dropping phenomenon. The combustion surface is black and carbonized, with black smoke and jump phenomenon, with the smell of PE paraffin. Free mailing information: please use SMS to tell me the address, postcode and receiver.

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