Shanghai Daoqin Plastics Co., Ltd.

预塑时 back pressure table/sheet screw in 预塑时计 amount in pressure. back pressure for melt temperature degree effect/influence relatively large: back pressure improve/increase make in material material 密实, long material material in screw in hot 厉程. quality to improvement, high back pressure make hot high, can can make material material degradation. back pressure in lower 列状况 is need: add hot melt, especially is pellets 经由剪切 hot still melt 者. machine 械, appearance property, for color masterbatch （ color powder ） and filling material (glass fiber) uniform dispersion. remove material belt/tape 入之空 gas toward material 口排出. generate 均一 熔 melt temperature degree degree 轴, especially is in has screw amount long degree by shrink short 时. decrease/reduce 残留 缓冲熔胶 in holding pressure 期间因 is gas 陷入而造 formed 每模间之波动. Shanghai plastics has company