Shanghai Daoqin Plastics Co., Ltd.

 一, high temperature nylon introduction  
high temperature nylon is for 苯二甲 acid or 邻苯二甲 acid is raw materials and aliphatic amine through polycondensation reaction formed semi aromatic polyamide (PA) type polymer/macromolecule. due to its separation 子链含 has ring and amine flexible long 链, therefore tool has relatively high crystallization speed rate and crystallization degree. PPA engineering plastics is high temperature nylon is through fiber reinforcement high property can engineering plastics . high temperature nylon structure and crystallization features make its ratio nylon 6 6 and nylon 6 以 and other engineering plastics versus ratio, tool more more features and excellent comprehensive property can: rigid property strong/high, hardness high, high temperature resistance, good chemical resistance and low water absorption, dimensions degree and stability property and low warpage property, excellent fatigue resistance, in many field/area automotive parts, machine 械 parts and electrical, electronics parts in used for electrical machine parts, device upper and other has application.  
二, plastics in machine in application 广泛 
plastics material in machine housing/shell in has relatively is application, in 3G智 can machine and front, commonly used plastics material is PC, PC/ABS.随 4G智 can machine application and and, glass fiber reinforced polycarbonate (PC) (PC) due to tool has relatively good tough property, rigid property and and metal tool has 一定 结 combined force, in machine in application 越 越 formed 熟. nano injection molding metal machine 兴起, as is and nano injection molding sleeve/set in frame for dimensions degree, dimensional stability and low warpage property requirements more high;而 glass fiber reinforced polycarbonate (PC) (PC) still in rigid property 不够, easy generate or tensile deformation, rear need 整形, in and machine metal separation combined force low, surface hardness low and other 不足, this it in appearance relatively easy 刮花, fiber exposure difficult 处理, dimensions difficult adjustment and other issues. glass fiber reinforced PC材 material also in resistant strong/high acid strong/high alkali, chemical resistant solvent agent property can 差, spray coating electroplating easy cracking and other issues. glass fiber reinforced PC property can already meet/satisfy high degree requirements. PPA engineering plastics positive good glass fiber reinforced PC property can upper and defect, in high machine in frame application positive to 青睐.  
三, machine in frame metal and plastics combined improves strong/high degree  
1, 结实坚 hard, rigid property strong/high, hardness high, low warpage property:  
手 machine is decrease light weight, in has 限空间 can nano more more electronics parts, meet/satisfy machine function most large 化, therefore in frame design upper reduce aluminum alloy thick degree achieve, most thin to 0.2-0.4mm, this need and combined provide strong/high degree plastics need tool has ultra- strong/high rigid property meet/satisfy.  
PPA engineering plastics tool has excellent rigid property and comprehensive property can, glass fiber reinforcement content can high 达50-70%, but also glass fiber content increase meanwhile improve/increase impact tough property, 50% glass fiber reinforcement PPA engineering plastics tensile strength high 达200MPa, flexural strength 300MPa, flexural modulus 13000-15000MPa, surface hardness more is to HR120;而 currently used for machine in frame glass fiber reinforced PC普遍 glass fiber (GF) content is 10-20%, 20% glass fiber reinforcement PC tensile strength has 70MPa, flexural strength 120 MPa, flexural modulus 5000 MPa, surface hardness HR113. due to in frame aluminum alloy thin, easy deformation, also need 承载众 more electronics parts weight, rigid property 不足则整形困 difficult, warpage dimensions unstable. 20% glass fiber reinforcement PC rigid property 远达不 to requirements, surface hardness most high has 113, surface easy 刮花;50% glass fiber reinforcement PPA engineering plastics high surface hardness and rigid property, and dimensions degree and stability property need ratio PC add excellent 秀, can can meet/satisfy requirements. for/regarding requirements ultra- thin dimensions frame, can ensure its good tough property, rigid property and dimensions degree.  

2, tough property good:  
如 table/sheet 1: glass fiber reinforced PC in glass fiber (GF) content is 10-20%时, tool has excellent impact tough property, rigid property relatively low to application requirements. 进一步 improve/increase glass fiber content although improve/increase glass fiber reinforced PC engineering plastics rigid property, is loss impact tough property is 代价. is PC is non polymer/macromolecule, but also for force 敏感, therefore glass fiber add to 30% above 时, impact property can decline heavy, has 8-12KJ/㎡, rigid property increase non has can make strong/high degree and rigid property to use technology requirements, 反而导致 impact tough property heavy loss 失, 以致于跌落 testing easy cracking. PPA is types semi crystallization semi aromatic polyamide (PA), its separation 子链含 has ring and amine flexible long 链, therefore make glass fiber content high 达50%, its impact strong/high degree also can maintain high 达20 KJ/㎡, tool has excellent fatigue resistance and resistant creep property can, ensure machine testing fracture. especially is as is requirements rigid property and property 并存 扣 parts in, one-time property use or heavy property use most selection.  
3, good chemical resistance good resistant chemical product property  
PC add for force 敏感, spray coating front 做冰醋 acid testing easy cracking, resistant acid alkali;而PPA due to crystallization 排列紧密, property can improve/increase, therefore chemical resistant solvent agent property can excellent 秀, can resistant acid, acid alkali and other chemical material 质 侵蚀而不 cracking.  
4, PPA受 water absorption effect/influence small, tool has dimensions degree, stability property and low warpage property  
due to PPA separation structure in separation 子链段含 has ring, separation structure 规整, 链段不容 easy 运动, therefore and nylon 6 6 and nylon 6 versus ratio water property low, 约0.27%, its water amount ratio nylon low separation 之二, therefore wet dimensions small, meanwhile due to resistant temperature high, thermal expansion coefficient and metal or aluminum versus 当, tool has ultra- strong/high rigid property, high low temperature for formed warpage and dimensions deformation very small, tool has excellent dimensions property and low warpage property. especially combined density high 通讯手 machine field/area.  
5, fiber exposure small, surface can spray coating and electroplating  
due to PC resin melt viscosity large, glass fiber reinforced PC材 material injection molding products surface easy generate fiber exposure, is 一直困扰 and difficult solution issues, 而PPA engineering plastics fiber exposure small or fiber exposure, tool has good surface quality, easy molding. can spray coating and can electroplating effect/influence surface quality, this for/regarding 追求美感 color color more 样化无疑 is more good selection.  
6, and metal combined force high, anti temperature degree and dimensions 整形时 generate iron separation 离.  
PPA engineering plastics and aluminum alloy combined force high 达120kg.f,而PC has 70 kg.f, is PC 1.7倍, meanwhile PPA engineering plastics thermal expansion coefficient and aluminum alloy versus 近, therefore tool has excellent fatigue resistance and resistant creep property can, in high low temperature 急剧变化 and molding rear dimensions stability, basic need 整形, but also generate aluminum alloy and plastics separation phenomenon, glass fiber reinforced PC due to rigid property 差, injection molding rear 放置容 easy generate warpage deformation, need heavy new 进行整形, meanwhile due to and aluminum alloy combined force low, material bending deformation degree large easy production property fracture and aluminum alloy and plastics separation 离.  
7, force 兴PPA suitable for machine Model/Grade:  
currently high temperature nylon grade in automotive and electronics parts upper application relatively more, very less used for machine field/area. force company according to market need combined machine features, development types Model/Grade PPA engineering plastics, high rigidity 7G050 and more good tough property 适于打螺母柱 anti cracking 7G050A, its property can already 经接近 or excellent outer type product, already formed used for more Brand machine in frame in, deep large use good and 欢迎. can according to need Color Matching, and outer housing/shell color color sleeve/set color color more 样化. is anti black for 天线信号 effect/influence, development types 不会削 low 天线信号 specialized black 7G050A K221.