Shanghai Daoqin Plastics Co., Ltd.

  engineering plastics property can has different, positive is is this property can, has use material application in different field/area, lower 面我们就一起看看, different engineering plastics property can comparison.

1.工 as temperature degree
2. hardness
3. resistant impact strong/high degree
4. resistant strong/high degree
5. resistant outer property can
6. resistant 伽玛射线 property can

1.工 as temperature degree
selection material need 考虑 一 key/critical factors is material heat resistant property. usually 讲, if make material most large as temperature degree improve/increase versus need increase more more cost. filling agent add can large improve/increase material hardness and heat deflection temperature (HDT), but also, for/regarding high property can and specialized polymer 说, glass fiber add can make cost large decline. therefore, usually in polymer filling glass fiber in improve/increase material property can and reduce cost.

图1: filling 30％ glass fiber polymer most large as temperature degree and heat deflection temperature (HDT)

注: high property can material generally add carbon fiber improve/increase material hardness and heat deflection temperature (HDT). and glass fiber versus ratio, its advantages:

1. hardness more high

2. density more low

3.良 good conductive property

4.良 good scratch property can

因 is this causes, carbon fiber by use in automotive material 输送线 and material system upper.

2. hardness

metal versus for/regarding plastics most large advantages 之一就 is it tool has very high hardness （平均 value comparison need ratio plastics high 8倍）. however, in many application in, need this high hardness, if has necessary 话, also can through active design, skeleton/framework reinforcement and low density 进行补充.   filling agent and fiber add can large improve/increase material hardness. in very more lower, hardness is material key/critical property can.

当 surface appearance is main/primary issues 时, glass fiber due to its high property ratio by use. however, glass fiber make material generate toward property, reduce it processing properties, meanwhile easy abrasion loss.

当 need product appearance 时, can add 入一 矿石 filling agent, carbon acid 钙, slip 石, silicon 灰石, 云母都 is very good selection. however material hardness and heat deflection temperature (HDT) need ratio filling glass fiber material low very more.

档次 relatively high product, can selection carbon fiber as is filling agent, it can 赋予材 material non high hardness. filling carbon fiber its it advantages has: conductive property, good scratch property can, low density.

图2: commonly used substitute/replace metal polymer hardness （未 filling and filling 30％ glass fiber material ）

filling glass fiber high crystallization degree polymer flexural modulus high 于10GPa: poly butanediol ester PBT, polyoxymethylene (POM) POM, poly ethylene glycol ester PET, polyphenylene sulfide (PPS) PPS, polyether ether ketone PEEK, liquid resin LCP. in this material in, liquid resin LCP tool has most high hardness has most high 各 toward 异 property.

3. resistant impact property can

in many application in, resistant impact property can is key/critical property can. in this material in, for/regarding filling material, polycarbonate (PC) PC and it mixed combined material: polycarbonate (PC) PC/ABS resin and polycarbonate (PC) PC/ poly butanediol ester PBT tool has high resistant impact property can. 当持续工 as temperature degree ultra- 100-120°C时, this material is good selection. for/regarding filling glass fiber material has more high hardness, liquid polymer/macromolecule LCP performance property can

图: room temperature lower commonly used substitute/replace metal polymer impact property can （未 filling and filling 30％ glass fiber ）

impact property can modifier effect/influence
impact property can modifier add can make many property polymer material tough property to very large reinforcement. polymer tough property it 自身, impact modifier amount and modifier in in dispersion quality 共同决定. however, in has lower must and hardness, chemical resistance and processing properties versus combined 折衷考虑

4. resistant property can
plastics substitute/replace metal very has outlook/prospects field/area is abrasion scratch application 方面, gears, 泵转子, engine 部 parts, 刹车部 parts, sliding separation and other and other. in this field/area, plastics tool has below/following advantages: design active property decrease light weight, use lubricated lubricated property, reduce 噪声. is this application need, requirements material tool has low 动态摩 scratch and good wear resistant loss property, 以避免 in 接触 interface upper hot, therefore need to below/following 几点: 避免 mechanical properties reduce, make material abrasion loss most small 化, 避免平 slip phenomenon. has very less material 自身就 tool very good lubricated property and wear resistant loss property, therefore, material this property can usually can meet/satisfy industrial requirements, is this causes, abrasion scratch material has 层状 filling agent, silicon and polymer this material 质, PTFE PTEE就 is product in use types polymer. in certain lower, most material selection will 依赖于工 as temperature degree, hardness or chemical resistance.

图: Common plastics hardness and heat deflection temperature (HDT)

commonly used used for reduce material friction coefficient separation has: 石墨, oxidation 钼, PTFE PTEE, silicon or polymer/macromolecule amount silicon resin.

添 add carbon fiber is 一 不错 selection, especially is for/regarding that need non high hardness application combined.
添 add carbon fiber lubricated combined system （ PTFE PTEE and has machine silicon or machine silicon ） will make material tool versus low friction coefficient.

5. resistant outer property can

当一 products 持续暴露于紫 outer light lower, or it by used for outer, this 样 材 material need has good resistant outer property can. this application automotive, 运输工 tool, lighting equipment and other and other need has good resistant gas property. according to generally solution polymer resistant outer property can is can 行, is this large 依赖于材 material chemical structure and aging mechanism. has di polymer usually for outer light more is 敏感（如ABS resin ）. in very more lower, used for resistant outer 辐射 材 material has outer light stabilizer or carbon 黑.

图: commonly used plastics resistant outer property can.

additives for UV resistant property can effect/influence

impact property can modifier
添 add impact property can modifier material usually ratio add 基体本身 resistant outer property can more 差, this for/regarding has di polymer impact property can modified rear more is 准确, ternary 乙丙橡胶EPDM, impact modifier MBS resin, butadiene - styrene copolymer SBS resin.
acid type and effect/influence  
acid and effect/influence polymerization process, additives separation understanding, filler and external ring 境（如化 factory ）, it for/regarding material resistant gas property has negative effect/influence. polymer polycarbonate (PC) or polyamide (PA) in a small amount of or amount 基团（ hydrogen oxidation 钠, amine ） for material resistant gas property has effect/influence. this can 常会促 make ester 基交换 reaction, from 而导致 polymer aging and 泛黄.

注: in polycarbonate (PC) in need has amount ppm grade 钠就足以 make material color stability property, hydrolysis stability property and most aging property can to large effect/influence.
因 is this causes, polymer pure degree and additives pure degree must to heavy 视, it is improve/increase material resistant gas property need 考虑 至关 important factors.

6. resistant 伽玛射线 property can

in specialized combined 里, material need 经常暴露 in 伽玛射线 lower, this especially is in medical application upper, need 进行定期 杀菌消毒. usually, has di or a large amount of aliphatic mono 元 材 material tool good resistant 伽玛射线 can force.

例如一 for 伽玛射线 resistant force very 差 材 material, 如: ABS resin, polyoxymethylene (POM) POM, polypropylene (PP) PP. in medical application upper, outer 科手术工 tool, 牙科工 tool, device tool and other and other, this material 都应当 has good resistant water property, resistant property and good chemical resistance.
for/regarding requirements high combined, 一 材 material, 例如PSU, PPSU, PEEK, LCP, PEI, is good selection, for/regarding requirements low combined, polycarbonate (PC) is has very good property ratio selection.

图: various plastics resistant 伽玛射线 can force