Shanghai Daoqin Plastics Co., Ltd.

PBT plastics raw materials polybutylene terephthalate (PBT) chemical and material features PBT is most tough engineering thermoplastic material 之一, it is semi crystallization material, has very is good chemical property, machine strong/high degree, electrical insulation features and hot property. this material in very 广 景象 conditions lower has very good property.  
    PBT plastics raw materials wet features very low. non add strong/high type PBT force strong/high degree is 50MPa, additives type PBT张 force strong/high degree is 170MPa. additives amount will 导致材 material 变脆. PBT; crystallization very active 络, this will 导致因 cooling non-uniform formed deformation. for/regarding has additives type type PBT plastics raw materials 材 material, process/workflow 标 方针 shrink short rate can decrease small, and process/workflow 垂直标 方针 shrink short rate upper and 通俗材 material has separation 辨. material shrink short rate in 1.5%~2.8% between. 含30%玻璃 additives material shrink short 0.3%~1.6% between. melting point （225%C） and low temperature deformation temperature degree ratio PET材 material need low. Vicat softening temperature large is 170C. 玻璃化转换 temperature degree （glass trasitio temperature） in 22C to 43C between. due to PBT crystallization speed degree very high, is it viscous property very low, parts processing cycle 时刻 别也 relatively low.
    injection molding process conditions  
    drying 措置: this category of material in low temperature lower very light easy hydrolysis, is processing front drying is very important. in gas in drying conditions is 120C,6~8 small 时, or 者150C, 2~4 small 时. wet degree must small 于0.03%. is use wet drying device drying, conditions is 150C, 2.5 small 时 
    melt temperature degree : 225~275C, temperature degree: 250C. mold temperature degree: for/regarding add strong/high type material is 40~60C. need very good design mold cooling 腔道以 decrease small parts 盘曲. hot amount dispersion 失必定 need fast uniform. mold cooling 腔道 直径 is 12mm.  
    injection pressure : in and other （ most large to 1500bar）.  
    injection speed degree : as can can fast injection speed degree （ due to PBT solid very fast ）. runner and gate:倡议操 as runner growth pressure 传递（ experience 公式: runner 直径=塑 parts thick degree +1.5mm）. can as type type gate. can as hot runner, need positive anti material and degradation. gate 直径应当 in 0.8~1.0*t between, this t is parts thick degree. is is 潜入式 gate, most small is 0.75mm. use 处 家 use use tool （ food processing sheet/slice, true 空吸尘 device parts, electrical 风扇, drying machine housing/shell 体, device and other ）, electrical appliances parts （开关, electrical machine housing/shell, filament box/case, relatively machine 键盘按键 and other ）, automotive product （ dispersion hot device 格窗, 车身嵌 sheet/plate, cover/cap, 门窗部 parts and other ）.