Application of Polypropylene (PP) in Automobile Engineering
Polypropylene has abundant raw materials, low price, excellent performance and wide application. The current development speed is the fastest among thermoplastics. The amount of the car can reach 10 kg to 20 kg per vehicle, and the number of parts can reach dozens. Mainly for body interior parts, ventilation and heating system accessories, engine related accessories and exterior parts. According to the installation position of the product on the automobile, different requirements are imposed on the product material, and the material is generally required to have heat resistance, impact resistance, aging resistance and high rigidity. Therefore, after the indicator is determined, the material of a certain grade can be selected, and the cost should be considered.
Since the requirements for plastic products for automobiles are higher than those for civilian products, ordinary polypropylene plastics can not meet the requirements for use on automobiles. Therefore, the development and application of modified polypropylene materials have developed rapidly in recent years, with polypropylene as the main body and others. Polymer blending is a simple and effective method for the modification of polypropylene. In general, a mixture of two or more kinds of high polymers can be used to prepare a mixture having the properties of these high polymers.
(1) Improve low temperature impact resistance. Polypropylene added EPDM, polybutylene, butyl rubber, polyisobutylene, EVA, etc., can improve the impact strength of polypropylene, especially the low temperature impact strength of polypropylene.
(2) Improve coloring. The addition of PA, PU, ​​polyacrylate, polyester, etc. to polypropylene can improve the colorability of polypropylene.
(3) Improve antistatic properties. Polypropylene is highly insulating, so it is easy to carry static electricity. The effect of adding antistatic agent alone is not so significant. For example, when mixed with polyvinyl alcohol, it has good antistatic effect.
(4) Flame retardancy. Polyethylene, like most plastics, can burn and has a high calorific value, which is extremely unfavorable for the application of polypropylene in automobiles. Therefore, flame retardancy is improved by adding a flame retardant or the like.
(5) Filling and reinforcing modified polypropylene. Polypropylene filled talc, mica, calcium carbonate, glass microspheres, etc., can improve heat resistance rigidity, dimensional stability, etc., but the modification effect does not exceed the performance range of general-purpose resins, and does not meet the performance required for engineering plastics. Therefore, glass fibers may be added (the surface is treated to have a large affinity with the resin), and heat resistance rigidity, dimensional stability, creep resistance, mechanical strength, and the like can be improved.
Denim clothing has become one of the favorite styles for most people, and its sales are also good. Our products are generally made of cotton material, because compared to denim fabric, denim cotton is a fabric made of denim and pure cotton. Denim cotton fabric is softer and more breathable than denim fabric. Because pure cotton fabric is added to denim fabric, it also has good water absorption, making it suitable for making jackets and suitable for wearing in spring and autumn, which is both warm and beautiful. While not losing your temperament, it can also make you more comfortable to wear.
Our products will be exported to many countries such as the United States and Russia. Denim clothing has no gender restrictions and has a variety of styles. It is not only favored by foreign customers, but also by our domestic customers.
Denim clothing may look plain, but it is no longer just casual or handsome in our impression. It can also be worn with exquisite feeling, highlighting elegance, and same-color series have a sense of high-end; intellectual freezing age wind, loose version, soft texture, and matching with same-color decorations, more gentle. A seemingly ordinary piece of clothing, as long as it is matched well, can also be worn in many styles. This is also our design concept. Denim clothing has always been at the forefront of fashion, but we have to stand out among many popular products. Part of it is due to the characteristics of our clothing, such as the durable and wear-resistant material of denim clothing. The design is also durable and resistant to dirt, and it is also suitable for many seasons, with a very wide range of applications. Denim clothing made of denim fabric is soft, wrinkle-resistant, and has good elasticity, making it comfortable to wear. A seemingly ordinary piece of clothing, as long as it is decorated with some accessories and matched well with the overall style of clothing, will give people a different feeling.
Ladies Jeans ,Leggings For Ladies,Western Jeans For Women,Stretchy Jeans For Women
T&H INTERNATIONAL TRADING LIMITED , https://www.th-shoetrend.com