Recycling waste plastics is a systematic project, but as for plastics, they can be classified into the following categories:
Thermosetting plastics and thermoplastic plastics
The definition of thermosetting plastics: substances such as phenolic plastics, urea formaldehyde plastics, 191 resin temporary plastics, etc. that cannot be further thermosetting formed after being heated or plasticized with additives, and then cooled and solidified Thermosetting plastics cannot be recycled for granulation
The definition of thermoplastic: Polymer resin can be heated and plasticized, cooled and solidified, and then re heated and plasticized as needed, in a cyclic mann Plastic recycling and granulation refer to this type of plastic

Further classification of thermoplastic materials can be divided into conventional thermoplastic materials and engineering plastics Commonly used thermoplastic general plastics include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), etc. Engineering plastics include acrylic butadiene styrene (ABS), high impact polystyrene (AS), or (HIPS)

Simple plastic identification can be achieved through the following methods:


1
Intuitive discrimination method

It refers to using human perception to experience some intuitive characteristics of plastic Visual appearance: bright? Half transparent? Not clear? What about the color (when not done)? Put it in the water, float? Sinking? Smell through the nose: Is there any odor? What odor? Touch by hand: lubrication or routing? Feeling cold or hot? Cut off with fingernails, are there any traces? Stretch it with your hand, is it hard or soft? Does it have patience and elasticity? Throw the plastic and hear its loud sound in your ears? Hongliang? Or is it depression? Fragile? Or is it resilience? Through these sensory examinations, it is possible to identify which type of plastic it is

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