Identification of plastic materials

- May 07, 2018-

1.PP material characteristics: good material flexibility, environmental protection, non-toxic, relatively high temperature, poor plasticity, difficulty in plastic, lack of luster surface, showing a matt color

Sensory identification: This product is white transparent and has a higher transparency than LDPE and sounds when rubbed.

Identification of combustion: When the flame is burned, the flame is yellow and blue, the smell is like oil, and the molten drips. When burning, there is no black smoke.


2. PET material characteristics: This material is environmentally friendly material, the hardness of the material is good, transparency is strong, the material surface is bright.

Sensory identification: This product is white transparent, feel hard, sound when rubbing. Appearance like PP.

Identification of burning: When burning, there is black smoke, and the flame has a phenomenon of flashover. After burning, the surface of the material is black carbonized, and the finger rubs the black charred material after burning, and the carbide is powdery.


3. PVC material characteristics: It is one of the most commonly used materials for blister packaging. The price is moderate, the toughness is strong, and the moldability is good. If it encounters cold weather, it will become brittle and easily broken.

Sensory identification: looks very similar to EVA but elastic.

Identification of combustion: Black smoke when burning, away from the fire, the burning surface is black, no melting dripping phenomenon.


4. PP + PET material characteristics: This material is a composite material, the surface Guanze, wear resistance, good plasticity.

Sensory identification: appearance like PP, very high transparency, when rubbing louder than PP.

Identification of combustion: When burning, there is black smoke, the flame has a phenomenon of flashover, and the burning surface is charred black.


5. PE + PP copolymer: There are low density, medium density, high density polyethylene, soft hand, this material is less used.

Sensory identification: Compared with LDPE, this product has much higher transparency than LDPE, no difference in feel and LDPE, and tear test is very similar to PP film.

Identification of combustion: When the product is burned, the flame is all yellow, melted and dripping, no black smoke, and the smell is like oil.

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