Common plastic identification methods, what is the plastic identification formula?

The easiest way to identify it with fire, smelly, black color and non-flammable is definitely not a good plastic.

The resin has a fleshy feeling, the glass fiber has a bone feeling, the material is not lubricated, the grin and teeth are bared, the internal knowledge is large, the surface work is more, the resin should be compatible, the filler should be coupled, it is just not good, and the window is moderately wide.

Sensory identification: soft surface; The tensile toughness is stronger than that of LDPE, the feel is sticky (but the surface is not glued), the white is transparent, the transparency is high, and the feel and feel are very similar to PVC film.

Combustion identification: It is the same as LDPE when burning, and there is paraffin.

The smell is slightly sour, the burning flame is yellow and blue, and there is no smoke when burning. Molten dripping, easy to draw.

Commonly used ways to identify plastics.

1. Density method: examine the density of various plastics, use liquid as the medium, test the sinking and floating of the plastic in the liquid medium, and roughly identify the major categories of plastics, such as a piece of plastic placed in the water and floating on the water surface, it can be concluded that the raw material is not PVC (because the density of PVC is 1).

2. Combustion method: mainly examine the color of the flame and the smell and smoke emitted when burning, generally speaking, the combustion flame of polyolefin raw materials is mostly blue or light blue, the smell is relatively mild and light, and the smoke is white, and most of the raw materials with benzene or chlorine are easy to emit black smoke after combustion, and the smell is strong, ABS is. In addition, such as PE and PP have drip combustion, while PVC has no drip combustion, but has self-extinguishing phenomenon.

3. Optical method: mainly to examine the transparency of raw materials, generally commonly used transparent raw materials are: PS, PC, PMMA, AS; Translucent raw materials are: PE, random copolymer PP, homopolymer PP, soft PVC, transparent ABS, etc., and other raw materials are basically opaque.

4. Color discrimination method: Generally speaking, if the raw material without additives contains double bonds, the color will be slightly yellow, such as ABS, because of the butadiene copolymerization, the polymer still contains double bonds after polymerization, so it will be slightly yellow.

Most other identification methods require the use of various instruments, such as infrared spectroscopy, mass spectrometry, nuclear magnetic resonance, differential thermal scanning, thermal analysis, etc.

Plastics burn easily. You can use fire to distinguish between real and fake plastics.

There are hundreds of qualities of plastics, with different characteristics, I don't know what kind of plastics you want to ask, household plastic products? Or industrial production?