Shanghai Daoqin Plastics Co., Ltd.

PA is large engineering plastics 之一, full scope/range 而言, it currently year amount 居于各 engineering plastics raw materials 首位. currently use PA90% above is PA6 and PA66, other PA, 如PA11, PA12 and PA46 and other in 一 特殊 application in important property positive day growth. high temperature resistance PA46国 inner 尚未见 production.

　　PA46 is 1989 year 首先由DSM company industrial production, currently company PA46 output/production volume 约20kt/a. in has PA in, PA46 亚甲基 and amine content most low, tool has very high crystallization degree, this features 赋予PA46极佳 heat resistant property, chemical stability property, resistant creep property, corrosion resistant property and excellent electrical properties, and surface electrical retardant, electrical strong/high degree and CTI value high. PA46 main/primary used for resistant temperature property, rigid property and dimensional stability requirements key/critical electronics electrical equipment and precision machine parts, but also requirements tool has relatively high flame retardant grade 别.

　　 formulation formed:
　　 formed 份                                 use amount
       PA46(DSM)                       47
       glass fiber (GF) (巨石)                         35
       PBS-64HW                        13
       Sb2O3                                4
       other additives                             1

       extrusion process conditions:

       temperature degree               290,  300,  305,   300,   295,  295℃
       screw speed                         200---250r/min
       true degree                             >0.06MPa

       injection molding process conditions:
       temperature degree                                315～320℃
       pressure                                40～75MPa
       speed                                30r/min
       mold temperature                                100～120℃
       raw materials dry temperature degree                        130℃
       dry time                            3h
in PA add 入30% glass fiber, PA force property can, dimensional stability, heat resistant property, resistant aging property can has obvious improve/increase, resistant fatigue strong/high degree is reinforcement 2.5 倍. glass fiber reinforcement PA engineering plastics raw materials molding process and reinforcement large same, flow relatively reinforcement front 差, therefore injection pressure and injection speed degree need improve/increase, machine temperature degree improve/increase 10-40℃. due to glass fiber (GF) in injection molding process in flow direction orientation, force property can and shrinkage rate in orientation direction upper reinforcement, products deformation warpage, therefore, mold design 时, gate 位置, need combined 理, process upper can improve/increase mold temperature degree, products rear hot water in let its slow cooling. another, add glass fiber (GF) ratio/proportion large, its for injection molding machine 塑化元 parts abrasion loss large, most good is using/adopting di metal screw, machine 筒.