Shanghai Daoqin Plastics Co., Ltd.

 （一） liquid polymer/macromolecule polymer （Liquid Crystal Polyester）, 简称LCP. is 80 year 代初期 development 起 一 types new type high property can engineering plastics

　　一, overview

　　LCP is type tool has property can new type polymer. LCP is scope/range very wide type material:

　　a, solvent property liquid 晶: need in solvent liquid in processing;

　　b, hot property liquid 晶: can in melt processing.

　　 most industrial liquid crystal polymer (LCP) is USA DuPont company development solvent property poly for 亚苯基 for 苯二甲酰 amine （Kevlar®）. due to this type of type type polymer can in solvent liquid in processing, can melt, can used as fiber and coating material. below/following inner 容 包括 hot property LCP.

　　LCP appearance: color （也 has white transparent solid powder 末）;

　　LCP density: 1.35-1.45g/cm³.

　　 liquid resin heat resistant property classification ( low, in and high heat resistant type )

　　 type type heat deflection temperature (HDT) /℃ ASTM classification Japan classification grade 举例

　　 low heat resistant ＜177 Ⅰ type Ⅲ type Vectra® A430, Rodrun® LC3000

　　 in heat resistant

　　177～243

　　Ⅱ type

　　Ⅱ type Zenite® 6330, Vetra® A130, Novaccurate® E335G30, Sumikasuper® E7000, Rodrun®LC5000, Ueno LCP®1000

　　 high heat resistant ＞243 Ⅲ type Ⅰ type Xydar® -930, Zenite®6130 Vectra® C130, Ueno LCP®2000, Titan LCP® LG431, Novaccurate® E345G30

　　 high heat resistant liquid crystal polymer (LCP) table/sheet property 质

　　 grade Xydar®

　　G-930 Titan®

　　LG431 Zenite®

　　7130 Zenite®

　　6130 Vectra®

　　E130i Vectra®

　　c130

　　 versus for density 1.60 1.63 1.66 1.67 1.61 1.62

　　 tensile strength /MPa 135 139 145 150 165 159

　　 flexural strength /MPa 172 170 174 170 221 214

　　Izod notched impact strength /（J/m） 96 299 160 123 208 176

　　 heat deflection temperature (HDT) （1.82 MPa）/℃ 271 275 289 263 276 255

　　二, LCP features and application

　　1, features

　　a, LCP tool has reinforcement property: tool has 异常规整 fiber structure features, 因而不 reinforcement liquid plastics can to ultra- 普通 engineering plastics use separation 之几十 glass fiber reinforcement rear machine strong/high degree and its modulus water 平. if use glass fiber, carbon fiber and other reinforcement, more ultra- other engineering plastics.

　　b, liquid crystal polymer (LCP) also tool has excellent heat stabilized property, heat resistant property and chemical resistant product property, for large more plastics in creep features, liquid material can 忽略不计, but also wear resistant, decrease abrasion property excellent.

　　c, LCP resistant gas property, resistant property good, tool has excellent flame retardant property, can 熄灭火焰而不 again 继续进行燃烧. its and other grade to UL 94V-0 grade water 平.

　　d, LCP tool has excellent electrical insulation property can. its electrical strong/high degree ratio generally engineering plastics high, resistant electrical property good. in use temperature degree 200-300℃, its electrical property can effect/influence. use temperature degree can 达316℃ left right.

　　e, LCP tool has corrosion resistant property can, LCP products in concentrated degree is 90% acid and concentrated degree is 50% alkali in lower 不会受 to 侵蚀, for/regarding industrial solvent agent, material 油, agent and hot water, rear by solvent understanding, 也不会引起应 force cracking.

　　2, application

　　a, electronics electrical is LCP main/primary market: electronics electrical surface assembly welding technology for material dimensional stability and heat resistant property has very high requirements （ can surface assembly technology in use gas versus welding and outer welding ）;

　　b, LCP: printing electrical sheet/plate, 人造卫星 electronics parts, gas machine parts, automotive machine parts, medical 方面;

　　c, LCP add high filling agent or alloy （PSF/PBT/PA）:

　　 as is formed electrical 路封装材 material,

　　代替 ring oxygen resin as ring framework 封装材 material;

　　 as light cable 接头护 sleeve/set and high strength parts;

　　代替陶瓷 as chemical industry use separation in filling material.

　　代替 glass fiber reinforcement polysulfone (PSU) and other plastics （宇航 device external sheet/plate, automotive outer made system ）.

　　三, LCP injection molding process

　　 due to modified rear property can and applications grade versus very large, its processing process 变数也 very large, versus adjustment lower scope/range:

　　1, drying: 140℃～140～150℃ /5-7Hr

　　2, injection molding temperature degree: 260～300～410℃

　　3, temperature: 100～100～240℃

　　四, main/primary production company

　　①Du Pont,

　　②Eastman,

　　③Solvay,

　　④Ticona,

　　⑤ Mitsubishi engineering plastics company,

　　⑥ Sumitomo,

　　⑦ Polyplastics plastics ( is Ticona and Japan large chemical company combined company ),

　　⑧ Toray ,

　　 in addition also has upper fine chemical industry company and Unitika company and other.

　　五, its it understanding

　　 hot property LCP tool has full aromatic polyester and copolymer ester structure. it also tool has 密集排列 直链 polymer structure, formed product tool has good mono toward mechanical properties features. good high temperature property can （ heat deflection temperature (HDT) is 121～355℃）, good resistant property, resistant hydrolysis property, weather resistance, chemical resistant product property, solid has flame retardant property, low property, high dimensional stability, low moisture absorption property, low 线膨胀系数, high impact strong/high degree and rigid property （按 same weight comparison, LCP strong/high degree large 于钢, rigid property is 钢 15%）. LCP can resistant acid, solvent agent and type and other chemical product, has relatively good retardant property.

　　 liquid aromatic polyester in liquid lower due to its large separation is orientation, it has 异常规整 fiber structure, property can 特殊, products strong/high degree very high, 并不亚于 metal and 陶瓷. tensile strength and flexural modulus can ultra- 10 year development various thermoplastic property plastics. using/adopting mono different, made liquid polyester property can, processing property and price different. selection filler different, filler add amount different effect/influence it property can.

（二）LCP , Link Control Protocol(链路 control agreement ) 简称

　　 is PPP agreement 一 子集, in PPP通信 in, 发送端 and 接收端 through 发送LCP包 确定 that in data in necessary 信息. LCP检查链接 equipment 标识, is also is 拒绝; 确定传输 in can 接收 包字节数; for di 方配置 is 否匹配, if 不匹配则断开链接. has in LCP包链接 is can use lower, data can achieve 网络通信. LCP negative equipment between 链路 创建, and 终止.