Shanghai Daoqin Plastics Co., Ltd.

         polyphenylene oxide (PPO) (PPO)也 is general purpose engineering plastics will 之一. it tool has rigid property large, heat resistant property high, flame resistant, strong/high degree relatively high, electrical property can excellent and other advantages. another, PPO also tool has wear resistant, 无毒, resistant and other advantages. PPO dielectric constant and dielectric loss in engineering plastics in is most small product types 之一, 几乎不受 temperature degree, wet degree effect/influence.

         commonly used is 由 2, 6-二甲基苯酚 combined formed polyphenylene oxide (PPO), tool has excellent comprehensive property can, most large features is in long negative lower, tool has excellent dimensional stability and electrical insulation property, use temperature degree scope/range 广, can in -127～121℃ scope/range inner long use. tool has resistant water, resistant property can, products has relatively high tensile strength, impact resistant strong/high degree and resistant creep property. in addition, also has relatively good wear resistance and electrical property can.

        1, PPO processing

         polyphenylene oxide (PPO) processing injection molding, 挤塑, pressure is 主, can foaming, plastics, glass fiber reinforced, electroplating, true film, printing, machine processing and 熔接. PPO material can heavy use, generally heavy use 3次, its property can has obvious reduce. PPO melt flow property 差, processing molding difficult, application large separation is modified PPO. lower introduction lower PPO injection molding process.

        PPO 预处理

        PPO is non crystallization polymer, water absorption very low, water separation make products surface silver streaks, bubbles and other defect, is 此, can will raw materials 置于80~1OO℃ 烘箱申, drying 1-2h rear use.

         injection molding machine selection

         for PPO melt using/adopting screw injection molding machine molding, nozzle using/adopting 直通式 is 佳, is 3-6mm. mold runner using/adopting relatively large degree or using/adopting material 钩, 浇道以 short coarse is good.

         injection temperature degree

         polyphenylene oxide (PPO) molding temperature degree is 280-330 degree, modified polyphenylene oxide (PPO) molding temperature degree is 260-285 degree. PPO plastics raw materials injection molding process material temperature degree:270-290℃.

        PPO tool has very high heat resistant property, hot separation understanding temperature degree 达350℃, in 300℃以 inner obvious thermal degradation phenomenon. usually, material temperature degree control in 260~290℃, nozzle temperature degree low material temperature degree 10℃ left right.

         due to PPO melt viscosity large, in injection molding using/adopting relatively high mold temperature. usually, mold temperature control in 100~150℃. mold temperature low 于100℃时, thin parts easy 出现充满不足 and delamination;而 high 于150℃时, easy bubbles, silver streaks, warpage and other defect.

         injection pressure

        PPO melt viscosity large, in injection molding 时, 宜采取 high pressure, high speed injection, holding pressure and cooling time can long. improve/increase injection pressure, has 利于熔 material 充模, generally injection pressure control in 100-140MPa, holding pressure pressure control in 40-80MPa. according to specific 情况 做 adjustment.

         injection speed degree

         has long runner products need fast speed injection, in 此情况 lower ensure film tool has 足够 通 gas property.

        2, PPO blending modified

         polyphenylene oxide (PPO) property can non excellent 良, resistant solvent agent property 差, products easy 发生应 force cracking, notched impact strength low, raw materials price 贵, low is its melt degree very large, flow property 差, soft temperature degree in 300℃ above, 而330℃ high temperature processing also easy degradation, formed processing molding difficult and can consumption large. is this disadvantages, 赋予PPO new property can, for its multiple modified methods.

        PPO and PS blending modified

        PPO and PS均 is non polymer, versus property very good, through mixed 入PS, can reduce processing cost, large large improvement PPO processing molding property, heat resistant property has reduce. this is polyphenylene oxide (PPO) generation alloy, make PPO to application, is this category of alloy property can, for its 一直做 various 改进.

        PPO and PA blending modified

        二者 blending not only improvement PPO processing properties and resistant solvent agent property can, also improve/increase PA heat resistant property and dimensional stability, from achieve advantages 互补. 但二者 versus property very 差, belongs to full versus system, blending alloy versus separation heavy, formed alloy 偏脆. research in PPO/PA alloy increase 容, toughened, reinforcement and other 方面做 a large amount of research, already very more research formed 果, make PPO/PA alloy to application.

        PPO and PBT blending modified

        二者 blending value material has solution PPO/PA alloy water property relatively large issues. 但二者 system need add compatibilizer increase 容. PPO/PBT alloy tough property and strong/high degree can meet/satisfy various use requirements, and PPO/PA blending system versus also need toughened, reinforcement.

        PPO and PPS blending modified

         in recent years, in electronics electrical appliances parts surface process in, welding and VPS method using/adopting positive formed is 主流, requirements use resin need resistant 260℃ above high temperature, pure PPO 玻璃化 temperature degree 仅210℃ left right, meet/satisfy 不 如此 high heat resistant requirements, development high heat resistant PPO/PPS alloy. 但二者也 need increase 容处理.

        PPO and PTFE blending modified

        二者 blending material, tool PPO heat resistant property, force property can, dimensional stability and PTFE wear resistant, lubricated property can, water property small, products degree high property can. can meet/satisfy metal structural parts material property and bearings property can comprehensive property can requirements.

        PPO and SBS blending modified

        PPO and SBS has good versus property, PPO/SBS alloy PPO degree and impact property can, tool has water absorption low, tough property good, heat deflection temperature (HDT) high and dimensions degree high and other features, main/primary used for electrical industrial and automotive industrial and other field/area.

        3, PPO application

         electronics electrical

         electronics electrical industrial upper used for manufacturing connectors, 线圈绕线轴, machine parts 护罩, 开关继 electrical appliances, equipment, large type electronics device, can electrical container, battery parts, and other parts.

         automotive industrial

         suitable for table/sheet sheet/plate parts, frame, decrease device, 泵 滤网, dispersion hot device 格子, device 格栅, control 台, box/case, electrical appliances 箱, connectors, and other.

        家 use electrical appliances

         used for electrical machine, electrical 脑, machine, belt/tape, machine, machine, add temperature device, electrical and other parts. can as machine, machine system, printing machine, true machine and other outer parts and parts.

         industrial machine 械

        适于 made as heat resistant parts, insulation parts, decrease abrasion wear resistant parts, parts; made as relatively high temperature degree lower use gears, 风叶, and other parts, can 代替不锈钢 use;也 can made as filament, solid parts and parts.