Shanghai Daoqin Plastics Co., Ltd.

变 pressure foaming technology （VPF）. in soft polyurethane ester foam production in. through control foaming ring pressure, use 任何辅助 foaming agent can production various density foam products technology is pressure foaming technology. pressure foaming technology production foam density scope/range generally in 10-80kg/m3, as pressure control in -0.05-0.05MPa(table/sheet pressure). technology most used for soft 泡连续 production 线, through separation control, cycle 切换密闭 molding inner system pressure, from achieve water 平连续 foaming. USA Foamex company as is use and UK equipment manufacturing 商Beamech company combined as development pressure foaming production already formed use more year. due to equipment 体积庞 large, control system complex, price relatively high. using/adopting pressure foaming production 线, production 规模应 in 1 10,000 tons / year above. equipment advantages is production, output/production volume large, efficiency high, production in generate foam 占总体 foam ratio rate small, raw materials utilizing rate high. in recent years technology already expand 展至间歇变 pressure (VPF)箱体 method, and pressure foaming production versus ratio, 间歇式 equipment large large 简化, investment large, disadvantages is output/production volume relatively low. outer OMs company, Beamech company, Hnnecke company has 间歇箱体变 pressure formed sleeve/set equipment 出售. 北京福奥盟 chemical industry technology has company 2003 year development made type equipment, already product 化. inner has 数家 injection molding parts processing positive in made semi polyurethane ester soft foam true foaming production equipment, has already material 试车, made equipment long degree generally is 60m above, is decrease/reduce foam 占总体 foam ratio/proportion, has add long trend. type equipment and 原普遍 use water production equipment has very more same 之处, foam dimensions basic same, main/primary difference in 于箱体 inner maintain negative pressure. this category of output/production volume relatively large, combined generally production injection molding parts processing requirements, 但头尾 foam 占总体 foam ratio/proportion relatively large, raw materials utilizing rate low. 转自: China plastics additives 网