How to distinguish between new materials and recycled plastics? The easiest way is to look at the plastic film against the sun to see if there is a star point. Usually there is regeneration, and basically nothing is new.
If you need to carefully identify, you need to pay attention to the following seven aspects:
1 , color: Anything that is more transparent than the one that is not transparent, no matter what color.
2 , luster: good gloss is better than no gloss, that is, the color of the surface of the material.
From the point of view of physical and mechanical properties, the recycled materials are made of waste products. After the wind and sun, the plastic surface has been aged and degraded, and it has been melted and plasticized by many high-temperature processes. Under the action of light, oxygen and high temperature, some polymers When oxidized, the macromolecular chain undergoes chain scission degradation, and the physical and mechanical properties are degraded. The more the number of regenerations, the more the performance is degraded.
3 , drawing: ( CaC03 more wire drawing is definitely not good, the reinforcement can not pull the wire) After blowing the fire, use the iron object to quickly contact the melt, and then quickly pull open to see if the wire is formed evenly, It is a good material. After a few times of pulling, the silk is overlapped and pulled apart again to see if it has elasticity. Can it be pulled again and continuously, and it is good to break after breaking or opening a distance. .
4 , ignited: whether the flame color smokes, whether it contains burning from the fire or not at all;
5 , smells: all kinds of plastic tastes are different, including flame retardants;
6 , floating water: As long as there is submerged water, if the above is not sure, or can not make up their mind, then only test machine.
7. If the above cannot be confirmed, please use the fire again. In the process of burning, the black smoke or the melt quickly drops, which is not good.
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