1. ABS resin is used in automobiles after polyurethane and polypropylene, the third largest resin
2. ABS plastic specific gravity: 1.05 g / cm3, molding shrinkage: 0.4-0.7%, molding temperature: 200-240 ° C, drying conditions: 80-90 ° C 2 hours
3. Advantages: ABS has good rigidity, good impact strength, heat resistance, low temperature resistance, chemical resistance, easy to process, processing dimensional stability and surface gloss is better, easier to paint, coloring.
4. Disadvantages: this type of product because it is formed by vacuum vacuum molding, product manufacturing mold for the single-sided mold, the thickness of the thin strength is poor, heat distortion temperature is low, combustible, weather resistance is poor, so this type of material can not be used for the bumper section of the surround, only to make the lip section of the surround.
PU plastic: polyurethane formate
1. PU plastic is currently the most widely used in the car a material, foreign famous car brands such as BMW, Honda, Toyota, etc., an average of about 10KG PU materials need to be used in each car, which is divided into soft and hard PU two kinds of environmentally friendly materials that can be recycled and reused.
2. Advantages: Attractive shock absorption, heat resistance, low temperature resistance, chemical resistance, good toughness, light weight, fast production speed, product standards, good collision resistance (able to withstand 20 kilometers per hour of the car collision force), good recovery, can withstand 360 ℃ torsion, durability, and very easy to install.
3. Disadvantages: expensive molds, high cost,