Shanghai Daoqin Plastics Co., Ltd.

thermoplastic property 硫化橡胶 processing and application
田明, 李齐方, force, 田洪池, 冯予星, cationic (北京 chemical industry large material and engineering 学院, 北京 100029)

摘 need :综述 thermoplastic property 硫化橡胶(TPV) processing and application. TPV tool has significantly property, wide processing temperature degree and low 模口膨胀 rate, in 包括模 pressure or calendering molding, extrusion, blow molding to injection molding in, has relatively good processing properties. TPV excellent property can and active design features is its in automotive, electronics electrical, construction, packaging and other field/area provide vast application outlook/prospects.

key/critical 词: thermoplastic property 硫化橡胶; processing; application;综述

in classification 号:TQ 334 文献标识码:A 文章编号:1000一1255 (2002) O1 -0054 -03

thermoplastic property elastomer (TPE)兼 tool 传统橡胶 high elastic property can and resin thermoplastic processing properties, can utilizing has resin processing equipment and processing methods (如 calendering, injection, blow molding and other)进行橡胶 products manufacturing, more important is, it can resin 一样实行 more processing by recycling and again utilizing, can large meet/satisfy low can consumption processing, more processing, precision processing, can heavy processing requirements, is development important direction, is solution processing and recycling again utilizing most good 途径.

TPE made methods has chemical combined formed method and blending method. blending method utilizing has and resin product types, combined 理搭配 production multiple thermoplastic property elastomer, is types tool competition force made methods. blending method separation is simple blending method and full method, currently rear is 主. use full technology manufacturing TPE常称 as thermoplastic property 硫化橡胶(TPV), currently 2 type combined molding thermoplastic property elastomer versus ratio, tool has product types more, property can 广, heat resistant temperature degree high, resistant aging property can excellent, high temperature pressure shrink deformation small, dimensional stability excellent, property can more 接近传统硫化橡胶 and other features.

1 TPV processing property can
due to TPV材 material is full crosslinked pellets uniform dispersion in thermoplastic property resin in formed, it filling polymer melt 体, can in relatively wide conditions lower, application resin processing equipment and process processing.

TPV performance significantly non 牛顿流体 features, in relatively wide scope/range inner viscosity and speed rate from 幂律关系, in pressure or calendering molding, extrusion, blow molding to injection molding in has good processing properties. in low speed rate lower high melt viscosity, is extrusion and blow molding products provide necessary melt strong/high degree, ensure products dimensional stability. for/regarding injection products, high injection speed rate lower viscosity low, 注模迅 speed full. 模注满 rear, due to speed rate reduce make viscosity large large increase, products very easy from in 取出. for/regarding thick parts can in short injection molding cycle formed, generate large deformation.

TPV熔 melt viscosity temperature degree 变化不 large, in relatively wide processing temperature degree scope/range inner, can achieve melt flow uniform property. TPV模口膨胀 rate low uniform, large large for extrusion and 吹模口 type adjustment. is due to large more 数TPV has 一定 吸 wet property, is a small amount of water separation for production effect/influence, in 60一90℃ lower drying 2一3 h.

2 TPV molding process
2.1 in molding
in molding is resin has molding methods, generally 硫化橡胶 molding can application, 而TPV材 material can using/adopting this type of methods. automotive use strip/profile and gears 护罩, use TPV substitute/replace chlorine 丁橡胶, using/adopting in molding methods can make parts cost reduce 30%一40%, can light amount 化, products property can has improvement; used for automotive 净化 空 gas tube/pipe, using/adopting 三维交换 blow molding technology can 够一边切断TPV and polypropylene (PP), 一边吹 gas extrusion (tube/pipe 子 两端 using/adopting TPV以 improve/increase property; tube/pipe other use full crosslinked type TPE以 improvement fatigue property and soft/flexible property; is reduce cost and maintain rigid property, in tube/pipe 子 直线部位 use PP. 以往由 several parts combined use parts can use 一 工 parts 代替, can large degree shrink decrease combined 工序. in addition, in molding technology in generally gas extrusion is 基础进行 technology new, development molding degree good injection gas molding, pressure gas molding and other new technology.

2.2 injection molding
TPV injection molding and 硫化橡胶 versus ratio, molding short (不像硫化橡胶需 maintain time). TPV既 can made mono pure injection molding products, can and other type material use made di color molding products. due to TPV tool has type hard 段, and other 链烯烃互 solvent property good, especially bonding 层(靠熔 melt bonding), very easy and PP/TPO/TPE and other type 材质 嵌入 molding di heavy injection molding, make product overall solid, use lifespan long, also can achieve and poly amine and other property di color molding. TPV used for automotive strip/profile injection molding, can will strip/profile injection molding, 玻璃 熔 melt solid molding and hot bonding melt strip/profile production upper, make strip/profile and formed is solid overall, large large improve/increase property.

2.3 extrusion molding
2.3.1 tube/pipe extrusion molding products
tube/pipe formed product has mono pure tube/pipe, di heavy extrusion tube/pipe and electrical 线 包覆层 and other. mono pure tube/pipe has food use tube/pipe 子, printing and other. more heavy extrusion tube/pipe automotive use 燃油输送 tube/pipe is table/sheet. this type of tube/pipe inner requirements resistant 汽油, property low, can using/adopting poly amine, outer requirements heat resistant, weather resistant flame retardant, can using/adopting TPV flame retardant blending material, use this types material can extrusion made tube/pipe formed product.

2.3.2 异形材 extrusion material
due to TPV formed product stability property excellent, extrusion rear molding shrinkage small, can used for extrusion various 剖面形状 complex product. extrusion water foaming molding, process in use has chemical product lower 进行TPV extrusion foaming, can production density low 至0. 2 g/cm3 extrusion type 材. and sponge molding versus ratio, tool has process simple (消 remove cycle), processing waste material can recycling, product color color and design active, production process for ring effect/influence small and other advantages. Japan automotive company 于1995 year using/adopting this type of methods production automotive machine 罩.

3 TPV application
TPV既 tool has similar hot solid property use property can, also tool has thermoplastic property plastics processing speed degree and other features, main/primary performance is high property can / price ratio, design active, quality light, use temperature degree scope/range wide, easy processing, product quality and dimensions stability and can ring recycled. 自1981 year 问世以, TPV己 used for remove outer has products upper, product types 包括EPDM/PP, NR/PP, NR/PE, IIR/PP, ACM/PP, NBR/PP, EPDM/PBT, EPDM/PA, NBR/PA, ACM/PET and other. most 近, USA AES company 鉴于TPV strong/high demand growth 形势, will its TPV product price growth 5%. currently TPV main/primary application areas is: automotive industry 占30%～40%; electronics electrical industry 占10%一15%; 土木, construction industry 约占10%; other field/area 占30% -40%.

3.1 automotive parts in high property can material
国 outer TPV most large applications is manufacturing automotive parts, main/primary is EPDM/PP TPV and NBR/PP TPV. automotive toward high property can (high speed, safety, 舒适, energy saving), long lifespan and light amount development, automotive parts especially is automotive system, machine system and other use TPV 呼声越 越 high, 以取代传统 hot solid property 硫化胶. TPV in automotive system application has 挡风玻璃密封 strip/profile, 侧边反射镜 密封, cationic 篷 密封材 material and other; in automotive machine system application 包括空 gas tube/pipe, soft tube/pipe, anti 护罩, anti base/seat 垫, sleeve/set and other. other automotive parts 如刹车部 parts (皮碗, 皮圈) and 消音部 parts and other.

3.2 in electrical cable, power/electricity 输送, parts application
TPV tool has excellent wear resistance, weather resistance, chemical resistant product property, resistant oxygen and ring 境污染 property, easy color, aging rear and relatively wide use temperature degree lower tensile property can maintain rate high and other features, full meet/satisfy electrical 线, cable industry standards, in electrical field/area in application ratio hot solid property more tool advantages. TPV used for electrical 线, cable, make in wet lower still tool has relatively good electrical insulation property. flame retardant grade TPV for ring 境污染 small, 遇火时 less 烟, less and less has material 质; used for pressure electrical parts 时, tool has good water property, use different material, can make by to use TPV as electrical base/seat 里, formed overall new parts tool has good water property, cost low. another, due to tool has good weather resistance, low temperature flexibility property, dimensional stability and design active property, can more fine product, for electrical insulation property effect/influence. TPV also can used for power/electricity system.

3.3 construction material
EPDM/PP TPV is 门窗, 玻璃密封 and 膨胀缝隙胶 理想材 material, tool has resistant property good, use lifespan long and excellent property, weather resistance and chemical resistant product property and other; can extrusion;安装时伸 long small, cost low, dimensions 精确, ratio EPDM,CR, MVQ high 3倍; can fast speed hot 火焊, time, use, bonding agent or injection welding machine; and PC or ACM versus solvent property good, cracks or 裂口; pressure shrink deformation low, in long 期密封 pressure lower performance good property; easy color, can selection color, and other parts maintain color 调一致; low temperature flexibility property good, in -60℃ can long use; resistant fatigue.

3.4 packaging materials
EPDM/PP TPV and IIR/PP TPV不论 in property can also is upper is packaging materials 理想材 material, tool has high temperature resistance, chemical resistant product, pressure shrink deformation property low and tensile property can and resistant fatigue property good and other advantages, used for:(1) food and material:TPV is water, 牛奶, 果汁, 啤酒, and food and other most packaging materials, tool has property good, in relatively wide temperature degree scope/range inner flexible good, chemical resistant product property 佳, high temperature shrinkage property and **** good, property low and other features;(2)美容 and product: can and various color 匹配, can coating color, mixed color, oil resistant, chemical resistant product, impact property can excellent 良, easy or generate 划痕;(3)医药方面: use medical grade grade TPV made sheet/plate, seals, 衬垫经 water high pressure device, high can 离子辐射 and oxidation ethylene rear, its property can 无变化. medical grade grade TPV for large more type medical grade tool has good stability property.

3.5 other field/area
EPDM/PP TPV used for made 备 人维护 product and tool product, tool has appearance and **** good, design active, heat resistant, chemical resistant product, resistant 蒸汽, resistant agent advantages, meet/satisfy FDA requirements. due to also tool has safety property and resistant property good features, also can used for 体育, 打猎, device 材.
more important is, various TPV between can blending to property can more is excellent blending material. 如NBR/PP TPV and EPDM/PP TPV blending material oil resistant property and NBR/PP TPV versus 当, low temperature resistance property good. for/regarding different resin 基体TPV blending, nylon 基TPV and polypropylene (PP) 基TPV blending, can through acid modified PP and nylon reaction formed nylon polypropylene (PP) grafting copolymer improve/increase 2 types TPV versus property. through plastics separation or 橡胶组 separation, expand large TPV in separation selection product types, increase TPV product types.

4 结束语
price and property can is TPV application formed 功 驱动 force. separation utilizing TPV design active features, for TPV future product processing and process 进行灵 active design, reduce product comprehensive cost, meet/satisfy field/area use requirements.

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