Shanghai Daoqin Plastics Co., Ltd.

  generally 而言, 车灯由反射镜, 透镜, housing/shell 体/ light 源, electronics electrical 路, and parts and other formed, automotive use main/primary plastics raw materials has PC, PP, ABS, PMMA and less its it plastics material. small 编 in 学习车灯 process in and more industry 朋友交流, very more table/sheet for 车灯各 部 parts material selection causes comparison 感兴趣, ratio automotive front large lamp covers is what selection PC而不 is PMMA and other and other.

this has more causes, plastics elastic property ratio strong/high, is 剧烈撞击情况 lower 游缓冲不会 light easy 破碎, make 破碎掉 in upper for 路人动 material type formed very strong/high 伤害. quality light, plastics housing/shell relatively 玻璃灯 housing/shell light 0.5~1.4公斤. corrosion resistant, resistant impact property good, transparent degree high, insulation property good, thermally conductive low, mechanical properties good, can property strong/high, easy molding processing.

1.PC（ polycarbonate (PC) ）

PC in upper application very 广, according to related data, 我们知道, PC series material in large in plastics type material in ratio 50% left right （ weight ratio ）. in in, PC main/primary application in front and 雾灯 透镜 and outer light 镜.

front large 灯

is what is PC? PC, polycarbonate (PC), tool has excellent impact property property and transparent property, force property can and electrical insulation property can good, use temperature degree 广泛, dimensional stability high, creep resistance high.

车灯 internal structure different tool has temperature degree 差, separation 反射镜 and temperature degree can can to 100—190℃, therefore in material selection generally selection PC and PC-HT.

front large structure

2.PP（ polypropylene (PP) ）

车灯 in application PP more is modified PP, in plastics type material in ratio 30% left right （ weight ratio ）. ratio 如尾灯 rear cover/cap, sheet/plate and 线束导槽（PP-T20）, front housing/shell and rear cover/cap, generally using/adopting is PP. currently 说, PP is front housing/shell main/primary material.

rear 尾灯

PP electrical insulation property and chemical resistant property strong/high, fatigue resistance good , in general purpose plastics in it force property can and heat resistant property most high, another, versus for/regarding other plastics 说, also tool price advantages.

3.PBT/PET

PBT in in generally application in front 照灯 饰圈, adjustment plant/unit in 支架. PBT and ASA modified rear again add glass fiber reinforced can use 做雾灯 housing/shell 体. force property can and PA, POM versus 似, friction coefficient small, lubricated property good, heat stabilized property and chemical stability property good, electrical insulation property excellent, rigid property and hardness high, impact good, dimensional stability high, heat resistant property good.

decoration material 一直以 heat resistant PC材 material is 主, in recent years by PBT/PET substitute/replace. PBT/PET车灯材 material versus for/regarding heat resistant PC突出 features is heat resistant high, processing property good, cost low. material surface gloss high; tool has excellent processing stability property and good hydrolysis resistant property; tool has excellent flow property and resistant thermal properties; material price and heat resistant PC versus ratio, can large reduce system cost, generally can reduce 40% left right. need attention/notes is, upper decoration material need using/adopting true 空蒸镀 technology for product metal 化处理.

4.PA（ nylon ）

车灯 in use to PA generally is PA+GF, in 普通 螺钉 adjustment or 者支架 use PA6+GF or 者PA66+GF. aromatic PA ratio 普通PA tool has more high heat resistant temperature degree and strong/high degree, in important adjustment structure and internal 支架也会 use to aromatic PA add glass fiber (GF).

5.PMMA

PMMA, 俗称亚克 force or has machine 玻璃, is types high degree transparent type thermoplastic property material. optical property can excellent, light transmittance can 达90%-92%, rate 1.49, weather resistance good, surface hardness high and and comprehensive property can excellent, main/primary used as optical transparent products. outer light and inner 氛围灯 light material.

front 雾灯

good, issues 啦!   automotive front large lamp covers is what selection PC而不 is PMMA?   

PC and PMMA is tool has high transparency degree and good processing features,但 is in application upper also difference. 首先, in heat resistant temperature degree upper,PC generally can to 130℃,而PMMA has 100℃ left right. its 次,PC材 material tough property comparison good,而PMMA材 material very 脆,受撞 击 easy 碎. most rear mono upper PC need high 于PMMA,且 formed flow property 也不如PMMA. generally lower, front large lamp covers is PC, this main/primary is due to front large 灯 照 degree high, dispersion hot amount large, but also 处于整车 front 方, this need types heat resistant, also can impact resistant material. rear lamp covers generally is PMMA, remove factors outer, rear generally is mono machine can 信号灯组 combined 体, need color and transparent di color versus 间, therefore flow property good PMMA就 is 不二之选.

6.ABS, PC/ABS

in field/area, ABS generally is and PC材 material modified rear use, according to use temperature degree and impact property can 不一样 决定ABS in PC含 has amount ratio/proportion. ABS, PC/ABS generally used for housing/shell and sheet/plate.

 7.BMC, PEI, PEEK, PPS, LCP and other material

车灯反射镜 main/primary using/adopting BMC and PET and other material. BMC is types new type material, tool has hot solid property plastics and reinforcement engineering plastics advantages. injection molding can meanwhile uniform flow, in short time inner can one-time molding, tool has high rigidity and high strength,良 good molding shrinkage and dimensions degree stability property. 基于BMC upper features, generally front large 灯 反射镜 using/adopting BMC. front large main/primary function is lighting front 方道路, ensure positive 常 行驶,反射镜配 combined versus 应 灯泡 can injection shot light and light types light 形,且近 light need has dark separation and high degree, therefore BMC良 good molding shrinkage and dimensions degree stability property can meet/satisfy this 一点. rear generally use PET,PC and other material, or 者直接 from upper molding 出. rear is 信号灯 machine can combined 体, dimensions degree front large requirements that high,但 if can from lamp covers 直接看 to 反射镜 话,反射镜 upper 反射面必 must need design 美观, ensure rear generate light 形.

future will toward 简约, light amount 化, high heat resistant, environmental protection trend development, for/regarding material selection 说, below/following 3点 is 车灯材 material in future need add strong/high and breakthrough key points.

1.透镜材 material, make light has uniform dispersion 射, high light dispersion property;

2. dispersion hot, can outer material as is front or housing/shell 体;

3. external weather resistance from 3 year 逐步 渡 to 5 year, requirements material （ coating ） need tool more excellent weather resistance and resistant temperature property.