Mainly used for high-quality LED lamp shade pc, pc shade will be a variety of problems in the course of daily use, especially crack phenomenon, which makes a lot of friends LED industry is very confused. Below, we analyze the PC lampshade cracking causes and find a good selection of LED lampshade, PC lampshade approach. ~ ~ ~ ~ ~ As we all know, PC has good toughness, the material properties used within the scope of the PC, PC cracking probability is very small. So why would a PC lampshade cracking phenomenon? The main reason is the PC molecular chain structure is damaged, disconnect the molecular chains, resulting in product cracks or surface cracks. Factors affecting the molecular chain structure are the following: pc shade ??? 1, repeatedly. Repeated use of the product in the continuous high temperature, molecular fission products will occur. Will crack high molecular chain breakage pc shade solution. A polymer material into low molecular substances, materials become brittle. ??? 2, the stress is too large, divided into two. First, the shape of the product itself, as well as the size and design of the mold itself by releasing the stress generated. Second, the outside world to the stress of the product. Pc shade too much stress, molecules will break. ??? 3, environmental factors. PH environment, strong ultraviolet radiation, high and low impact (Refer PC material environmental characteristics table), so the use of high-quality pc shade during particularly pay attention to the environment. ??? 4, filler material selection errors. PC itself is a polymer, the molecular links into many elastic network structure. If you had to make good-quality pc or pc lamp shade filler filled molecular size do not match. Then the PC network installed inside the elastic structure filled with other molecular structure of the material, so that the toughness of the product is damaged, the role of molecules also become small, whereby the occurrence of crack.