The performance difference between waste and new plastics.

The performance difference between waste and new plastics. After the regenerated precessing of waste plastics, the performance will decline more or less, mainly by photoaging caused by oxidation and thermal aging. The degree of performance degradation depends mainly on the life and the environment. Molding factory production generated scrap, scrap. Its recycled material performance degradation is very small, almost as new material used; indoor use, short product life, recycled material performance will not change much; while in outdoor use, long service life, the environment is poor (e.g. under pressure, electric field, chemical media and other effects) product performance poor, not even recycled. As the regeneration process of thermal aging, recycled materials color from light to dark. The following are some commonly used plastics recycling materials performance changes.

PVC Obvious discoloration after regeneration, renewable once after extrusion with a light brown color, almost three times becomes opaque brown. Viscosity in the second time-invariant, more than twice a downward tendency. Whether it is hard or soft PVC, regeneration should join stabilizer. In order to further products are glossy, recycled blend may be added an amount of usually 1% to 3%.

Polyethylene:Polyethylene after regeneration performance has declined, the color yellow, where the largest decline in anti-aging properties. After repeated after extrusion viscosity decreased high density polyethylene, low density polyethylene increased viscosity. Recycling can be added is generally blended in an amount of 8% or less.

Polypropylene: the color is almost the same, the melt index increased. More than twice the color emphasis, melt index is still rising. After regeneration, anti-aging properties and drop out of the maximum, breaking strength and elongation decreased.

Polystyrene: Regenerated color yellow, so generally be colored recycled polystyrene. Decrease in the performance of recycled materials and regeneration frequency is proportional to the level of the fracture strength of not less than 60% incorporation of significant changes in incorporation of an intrinsic viscosity of 40 % or less, no significant change.

Nylon: As for color reproduction, there are performance problems, incorporation of 20% or less. After regeneration elongation decreased, there is an increasing trend elasticity.

Other plastic: ABS more significant discoloration after regeneration, but using incorporation of not more than 20 % to 30 %, the performance with no significant change.