Where is the bumper of the car? What is the material?
At present the domestic automobile bumper is generally used (modified) toughened polypropylene (PP) material as raw material injection molding polypropylene (propylene) - Poly (commonly known as PP plastic material), has a high melting point (up to 167 DEG C), heat density (0.90g/cm3), is a kind of general plastic in the light, there is the high corrosion resistance (tensile strength 30MPa), strength, rigidity and the transparency of its products are relatively well characterized, disadvantages are poor low temperature resistance (by impact PP copolymer, Styrene Elastomer and polyolefin rubber modified materials, 3 kinds of blend composition with high rigidity, impact resistance, scratch and coating, injection molding bumper after loading, 8 km/h impact fragmentation, and has restored flexibility, performance and cost is decreased almost PU, 10%~20%)
Some other bumper is material (such as glass fiber, carbon fiber and other materials), because of its poor environmental performance (Recyclable) or higher cost factors, are not changed into PP materials (both bumper plasticity and rigidity, light weight and low cost, has been making thin bumper first the pursuit of the goal, while the ordinary PP material), stable size itself and the low temperature resistance is poor, so the next few years will make bumper materials with modified PP materials and the maturing of thermoplastic elastomer (TPO) as the leading production.
The bumper of a car is an accessory (wearing parts) of a car body, located in the front of the car (called the front bumper) and the rear of the car (referred to as the rear bumper).
