The performance changes of the five general plastics

The performance of waste plastics has different degrees of decline after it is recycled. Mainly caused by light aging, oxidation and thermal aging. The size of the performance degradation is mainly determined by the length of service and the environment. The production of the processing factory has the waste edge, the waste, the performance of the material is very small, almost can be used as the new material. Indoor use, the use of a short period of time, the performance of recycled material is not big, but in the outdoor life is long, the environment is poor (such as the pressure, electric, chemical and other functions) of the product performance is poor, and even can not be recovered.On the other hand, eps densifier and styrofoam recycling is necessary. Reference materials for the change of performance of several common plastic materials: PVC PVC regeneration after the change is obvious, once again after extrusion will have a light brown, the three is almost opaque brown, than the viscosity at two times the same, more than two times a downward trend. Whether it is hard or soft PVC and regeneration are should be added stabilizer, in order to make the product luster and regeneration can add ABS1%-3% doped mixed. PE

The properties of PE were decreased after regeneration, the color was yellow, and the viscosity of high density polyethylene was decreased, and the viscosity of low density polyethylene was increased after repeated extrusion. PP When a regeneration, the color is almost unchanged, the melt index rose, more than two colors, the melt index is still rising. The tensile strength and elongation at break were decreased, but there was no problem. ABS After regeneration, the color change is obvious, but the performance has no obvious change when the content of 20-30% is no more than. There is also a problem of the change of the color and the performance of nylon regeneration. The content of the mixture is 20%. The elongation decreased, but the elasticity increased. PS After the regeneration of the yellow color, so the regeneration of PS in general. The degree of decline in the performance of the recycled material is proportional to the number of regeneration times, the fracture strength is less than 60%, no obvious change, and no obvious change in the amount of 40%.

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