PBT美国杜邦LW9320

PBT美国杜邦LW9320

杜邦进口PBT LW9320 BK851钓具卷线器

杜邦进口PBT LW9330低翘曲 

杜邦进口PBT LW9420 NC010工程热塑材料

工程塑料PBT S600

塑胶原料PBT S650FR阻燃

进口增强PBT SK602 高刚性 

进口高强度PBT SK603 

进口高硬度PBTSK608

原装柜货PBT SK609 NC010

进口阻燃PBT SK641FR 原厂原包

进口高性能PBT SK642FR 用于家用电器

杜邦PBT SK643FR

盖德网PBT SK645FR*店

INJECTIONMOLDING PROCESS FOR REINFORCED PBT: Dry Treatment: this material iseasily hydrolyzed at high temperatures, so dry treatment beforeprocessing is important. The recommended air drying conditions are120 degrees, 6 to 8 hours, or 150 degrees, 2 to 4 hours. Humiditymust be less than 0.03% . If drying with hygroscopic dryer, therecommended conditions for 150 degrees, 2.5 hours, meltingtemperature: 225 ~ 275 degrees, the recommended temperature: 250degrees. MOLD TEMPERATURE: 40 ~ 60 degrees for unreinforcedmaterials. The cooling cavity of the mould should be well designedto reduce the bending of the plastic parts. The heat must be lostquickly and evenly. It is suggested that the diameter of coolingcavity should be 12mm. The selection of the temperature of thecylinder is very important for PBT, such as low temperature, poorplasticization, products will cause material shortage, depression,uneven shrinkage and matte phenomenon. But the temperature is toohigh, can cause the nozzle to salivate seriously, overflow theedge, the color turns dark, even degrades. In general, the barreltemperature is controlled at 240 ~ 280 °C, and the glass reinforcedPBT is controlled at 230 ~ 260 °C. The nozzle temperature should becontrolled at 5 ~ 10 degrees lower than the front of the barreltemperature. * * * * Pressure: PBT Melt has low viscosity and goodfluidity. Medium * * * Pressure can be used, generally 60-9OMPa /glass fiber reinforced PBT is 80-1OOMPa, usually * * Pressureincreases with the thickness of plastic parts, but do not exceed1OOMPa, otherwise it will make demoulding difficult. * * * Speed: ** * Speed should be used as quickly as possible (as PBT solidifiesquickly) . Runner and gate: Circular Runner is recommended toincrease pressure transfer (empirical formula: runner diameterplastic part thickness + 1.5 mm) . Various types of gates can beused. Hot runner may also be used, but care must be taken toprevent leakage and degradation of the material. The gate diametershould be between 0.8 and 1.0 * T, where t is the thickness of theplastic part. If it is a submerged gate, it is recommended that thediameter of the switch is 0.75 mm and the cover is 0.75 mm. Thepicture tube and the lampshade are chemical resistant, heatresistant and easy to use, water resistant and stable, easy to warpthe product, and the connector can be used in high humidityenvironment after being reinforced, pOLYBUTYLENE terephthalate(PBT) has good fluidity, the changes of door and window parts,resistance to friction and electric hair dryer, body panel 0.2% ,PBT and PBT as a result, reinforced PBT processing method: drying105 °C ~ 120 °c 4 ~ 8 hours. Dry material used in half an hour Sol220 °C ~ 270 °C retention time less than 7 minutes * * Pressure 300~ 700kg / CM2 screw speed 60 ~ 100RPM mold temperature 30 °C ~ 80°C back pressure 3 ~ 10kg / CM2 why energy performance, e clockShell, poor hydrolysis resistance, in C, electronic and electricalindustry, such as television transport machinery parts, formingmachinability and only take a few seconds, to large parts alsotoughness, mainly used for PBT, wiring board, size stability,weather resistance, with motor housing, all kinds of secondaryprocessing molding insulation, good Molding Properties ModifiedPBT,