Cosmetics bottles manufacturer to discuss the points for attention during the PET plastic injection molding

Cosmetics bottles manufacturer introduce PET plastic bottles are often used in packaging bottle type, one of the material cost of bottle is not too high, so the PET plastic bottles for so many cosmetic container material, or a high cost performance, also have been affected by a lot of cosmetics brand in the market customers. So popular bottle in injection molding should pay attention to what? Because PET macromolecular contains aliphatic, has must of hydrophilic, aggregate at high temperatures is sensitive to water contrast, when the moisture content is beyond the limit, in the processing of PET molecular weight decreased, finished product with color and crisp. Therefore, it is necessary to carry out the material before processing dry, the temperature is 150 ℃, boring more than 4 hours, generally is 170 ℃, 3 - 4 hours. Available air-launched inspection data is completely dry. Recover the material share generally don't exceed 25%, and to recover the material completely dry. PET for short time after the melting point, and melting point is higher, and therefore need to choose more temperature control section and plasticizing since the conflict less heating system of injection, and cosmetics packaging bottle manufacturers of finished products ( Water cut materials) Practice component is not less than two-thirds of machine injection quantity. PET plastic bottle embryo stream is commonly used in mold design, mold and injection molding machine templates have the insulation board, its thickness is about 12 mm, and the heat shield will be bound to accept high pressure. Exhaust is necessary enough to prevent present in overheating or fracture, but its vent depth generally do not exceed 0. 3 mm, or simple flash. Injection speed is faster, in order to prevent premature solidification in the process of injection. However, rapid and high shear rate, make the material become fragile, usually in 4 seconds. ( Guangdong) Daily necessities co. , LTD. Is a focus on research and development, build, and sales of high-end PET plastic bottles, the company is located in guangzhou, guangdong province, has more than 30000 square meters of research and development production base, has passed the certification of ISO three big system. Mainly include wash protect plastic bottles, cosmetics bottles, food packaging bottle plastic bottles, beverage bottles, hotel and other products, products are exported to dozens of countries and regions at home and abroad.