Shanghai Daoqin Plastics Co., Ltd.

         ultra-high molecular weight polyethylene (PE) (UHMWPE), types property structure tool has excellent comprehensive property can thermoplastic property engineering plastics, generally molecular weight in 150万 above, tool has other plastics can ratio wear resistant, resistant impact, corrosion resistant, low temperature resistance, lubricated, absorption impact can, 卫生无毒 and other comprehensive property can, by is “令人惊讶 plastics ”.

        1, melt features

         although UHMWPE is thermoplastic property plastics, is is its molecular weight high, in melt performance features and generally thermoplastic property plastics different, therefore can 按常规 processing methods molding processing.

        ① UHMWPE melt is 橡胶态 high elastic 态, viscosity non large, processing flow property very 差.

        ② UHMWPE tool has relatively low 临界剪切 speed rate, in relatively low speed rate lower, generate slip or phenomenon; injection molding easy 出现喷流 make products more or phenomenon.

        ③ 摩 scratch small, material process in in add material easy slip, method toward front 推进.

        2, molding methods

         due to UHMWPE features, very large degree upper made UHMWPE application. in recent years, UHMWPE processing technology to speed development, most 初 模 pressure molding development is extrusion, blow molding and injection molding and other methods more separation molding methods.

        ① 模 pressure molding

         most plastics molding methods, features is: cost low, equipment simple, investment less, processing plastics molecular weight made; disadvantages is: production efficiency low, strong/high degree large, easy oxidation and degradation, product quality unstable and other. according to specific process also separation is: pressure made -烧结- pressure made method, 烧结- pressure made method, pressure made meanwhile method, fast speed add hot pressure made method.

        ② extrusion molding

         extrusion molding equipment main/primary has extrusion machine, mono screw extrusion machine and di screw extrusion machine. its in toward di screw extrusion machine is 佳.

        a.柱塞 extrusion

        柱塞 extrusion can as is pressure made -烧结 method. this type of methods time long, production efficiency low, products wide degree to made.

        b. mono screw extrusion machine

         currently mono screw extrusion machine molding 仅占UHMWPE processing amount 2%, from property and use property 看, mono screw extrusion technology is most has value

        c. di screw extrusion machine

         di screw extrusion machine 克服UHMWPE powder material in screw slip issues, large large improve/increase material can force. toward di screw extrusion machine make material material to function small, make material material in extrusion process in thermal degradation decrease most small.

        ③  injection molding

        UHMWPE mono screw injection molding process main/primary is through high speed make material material dispersion uniform, 而充满 type 腔. generally plastics injection is melt 流体.

        ④ blow molding

        UHMWPE blow molding main/primary used for large type in products, automotive 油箱, type and other.

        ⑤ other molding methods

        UHMWPE other molding methods has: 冻胶纺 filament, pressure molding, pressure molding, pressure molding, welding molding and other.

        3, UHMWPE products recycling methods

         due to UHMWPE ultra-high force property can and easy processing property, UHMWPE products recycling again utilizing formed important difficult 题. 甚至一 waste product 站直接拒绝 recycling this type of product.

         currently commonly used recycling methods has:

        ① 研 abrasion method

         will UHMWPE products rear through pelletizing machine or its it equipment made formed powder material, again utilizing.

        ② 剪切撕裂 method

        针 for fiber products, can will fiber 进行剪切处理, rear can application.

        4, UHMWPE application

        ① ultra-high molecular weight polyethylene (PE) application in 装煤, 石灰, water 泥, powder, salt, material and other and other powder parts 拖斗, material 仓, slip 槽 衬里;

        ②  in national defense 军需装备方面, a large amount of used as anti material, helmet, anti elastic material;

        ③  in aerospace engineering in, can used as aerospace machine decrease speed drop and machine upper heavy material 绳索, 取代 传统 钢缆绳 and combined formed fiber 绳索, its development speed degree 异常迅 speed;

        ④  in use field/area, made formed 绳索, 缆绳, and tool suitable for engineering;

        ⑤  in industrial application in, can used as resistant pressure container, belt/tape, material, automotive sheet/plate and other; construction can used as 墙体, sheet/plate structure and other;

        ⑥  in use product upper already made formed safety 帽, slip sheet/plate, sheet/plate, 钓竿, and 自行车, slip sheet/plate, ultra- light amount machine parts and other;

        ⑦  in 医学方面, used for 牙托材 material, medical grade material and 整形缝 combined and other field/area, it material versus property and resistant property relatively good, tool has high stability property, 不会引起 敏, already as application.