Shanghai Daoqin Plastics Co., Ltd.

         polyvinyl chloride (PVC) (PVC) resin molding processing properties 差, melt viscosity large, flow property good, heat stabilized property low, easy formed separation understanding and other; another, PVC products resistant aging property 差, easy 变脆, hard, crazing, tough property good, resistant property and other, therefore generally need for its modified, upper disadvantages. modified PVC methods has strip/profile 途径: strip/profile is chemical modified, strip/profile is material modified.

         chemical modified

        1, copolymer modified

         copolymer modified, let chlorine ethylene mono and other mono 体进行 copolymer reaction, and acid ethylene, chlorine ethylene, acrylonitrile, acrylic ester, acid ester and other mono copolymer, improve/increase molding processing properties, or make molding temperature degree reduce, or new applications, or as is new type material 出现.

        2, grafting modified

         grafting modified is in PVC侧链 upper another mono 体基团, or types polymer, grafting reaction. ethylene /乙 acid ethylene and chlorine ethylene grafting, control chlorine ethylene skeleton/framework upper grafting separation amount and polymerization degree, improvement this type of modified material impact property can, low temperature property, aging property and other.

        3, chlorine modified

         chlorine modified is will PVC use water versus method (or gas versus method)进行 chlorine 化, make chlorine content 由原 57% improve/increase to 65% left right, this modified in improve/increase PVC heat resistant property, use temperature degree ratio PVC high 出35-40℃,称之 is chlorine polyvinyl chloride (PVC) (CPVC). CPVC density ratio PVC large, is 1.7克/立方 cm, flame retardant property can excellent 于PVC, tensile strength excellent 于PVC, disadvantages is impact strong/high degree low;CPVC molding temperature degree ratio PVC high 10-20℃, temperature degree adjustment scope/range narrow, stabilizer use amount ratio PVC more 1-2倍, lubricant use amount ratio PVC more. CPVC can use extrusion method, injection method, calendering method production products;CPVC can used for pipe/tube, sheet/plate 材, type 材, foaming material, bonding agent, coating material, modifier and other.

         material modified

         modified PVC strip/profile is material modified, through add various filler and additives improvement its property can. 例如添 add ACR improvement PVC material material molding processing properties;添 add inner outer lubricant or polyethylene wax improvement material material viscosity, flow property and other;添 add heat stabilized agent, improve/increase material material in molding processing heat stabilized property, reduce its separation understanding temperature degree;添 add antioxidant, UV resistant agent improve/increase products resistant aging lifespan;添 add increase agent improve/increase material material property can, increase products soft/flexible degree and other.

        1, filling modified

         filling modified is through add machine or has machine filling agent (filler) improvement certain property can. add powder filler, reduce PVC products specific gravity, 接近木材; add metal powder 末, copper powder, aluminum powder improve/increase products conductive property can; add iron oxygen magnetic powder, improve/increase products magnetic property can; add carbon acid improve/increase products hardness, meanwhile reduce material cost; add 入赤泥, improvement products heat resistant, light aging property can, meanwhile reduce material cost and other.

        2, blending modified

         blending modified is through add types or types high poly material (plastics, 橡胶, elastomer and other), through blending combined, to 谓“ polymer/macromolecule alloy ”, improvement PVC flow property or impact tough property. can and PVC blending modified other high poly material has: acrylonitrile-butadiene-styrene (ABS) copolymer (ABS), methacrylic acid ester - butadiene - styrene copolymer (MBS), polypropylene (PP) acid ester, chlorine polyethylene (PE) (CPE), ethylene -乙 acid ethylene copolymer (EVA), 丁腈橡胶, 乙丙橡胶, chlorine polyvinyl chloride (PVC) (CPVC), acid di ester and other. mixed chlorine ethylene /醋 acid ethylene copolymer resin, can reduce resin viscosity.

        3, other

         remove outer, also can use reinforcement modified, crosslinked modified, foaming modified, modified and other methods improvement PVC property can. use ratio large powder reinforcement, use oxidation 二异丙苯(DCP)进行 crosslinked modified, use nitrogen 二甲酰 amine foaming agent reduce PVC products specific gravity, use 钴60射线进行照射提 high strength and other.