Shanghai Daoqin Plastics Co., Ltd.

        PC(polycarbonate (PC)) as is machine types 基础材 material, in machine Front Cover, Rear Cover, Battery Cover upper to application. in recent years machine outer housing/shell metal 化越 越 formed is trend, 但PC due to its high property ratio, easy processing molding, type 丰富, combined structure complex made parts and other advantages, still maintain very high competition force and market has rate, is machine field/area most main/primary 基础材 material 之一.

        PC材 material in machine outer housing/shell upper application, main/primary has below/following parts (部 separation sheet/slice 摘自网络):

         different machine parts its function different, structure large same, therefore for material requirements 也不尽 same. is, in production in, types PC材 material need meanwhile meet/satisfy different made parts different function requirements, this for from 事PC材 material modified large 咖们提出 very high 挑战. small from certain 国际著名手 machine understanding to, use super tough PC材 material 经常遇 to issues:

         table/sheet 1: machine super tough PC材 material in use to issues

         its in, flow property and tough property is balanced issues, very difficult meanwhile to 完美 程 degree. mechanism parts is precision parts, thick degree can thin 至0.8mm left right, use PC材 material injection molding processing 时, processing temperature degree in 300 degree above, this for PC injection molding material heat stabilized property relatively high 挑战, can has degradation, property can poor 化, color, gas marks, flow marks and other issues; remove machine parts 本身经常 need 喷漆之 outer, its use ring complex, 经常会接触 to material 油脂, product, therefore material property can and chemical resistant product property, is PC材 material use 时 关注 focus/key point.

        1PC材 material flow property issues

        手 mechanism parts is battery cover/cap also is front / in / rear frame, comparison thin, structure precision, need PC材 material has excellent flow processing property.

        由 upper 图A看出: battery cover/cap most thin already 达0.8mm;由图B看 to, made parts structure non complex. this type of industrial design for material property can very high requirements.

        我们 again 看看PC separation structure, lower 图 示:

        但 is, due to PC separation is rigid property di 酚A more ring 链段构 formed, therefore PC材 material viscosity very large, flow property 差, processing difficult, lower 图(different material long ratio) 示:

        材 material flow property 不足时, injection molding can through improve/increase temperature degree, add large injection molding pressure solution material flow property issues, however belt/tape its it product defect. lower sheet/slice 示: 图A is certain machine use temperature degree 310℃ injection molding rear cover/cap 时, made parts injection molding 不满情况;图B is through improve/increase temperature degree and increase injection molding pressure made parts rear, made parts deformation comparison sheet/slice;图C is light micro deformation made parts machine Cu Sheet信赖 property 实验NG sheet/slice.

        综 upper 述, in machine industry, PC材 material processing flow property is important. mono pure improvement PC材 material flow property, can using/adopting lower achieve, lower table/sheet 2 示:

         table/sheet 2: achieve material flow property improves 手段

         from table/sheet 2 can 看出, mono pure improvement PC flow property methods more, is to cost, tough property, heat stabilized property, and chemical resistant product property and other more made conditions 时, improvement PC手 machine material flow property formed is modified industry large 咖们头 large difficult 题啦!

         combined 肥会通 launch third generation super tough PC手 machine material, grade:PC-4030, in meet/satisfy material tough property, processing heat stabilized property, property can and chemical resistant product property upper, large degree improve/increase material flow property, formed is industry 里PC手 machine modified material 标杆, lower table/sheet 3 示:

         table/sheet 3: combined 肥会通 super tough PC and 市面同 grade 别PC property can data

        2PC材 material heat stabilized property issues

        PC材 material 本身存 in separation rigid property large, easy processing features, mechanism parts thin, structure fine, is ensure made parts good dimensions and appearance, in machine industry for PC processing temperature degree usually using/adopting 300℃ or 310℃ above high temperature conditions. this belt/tape industry another 一 头痛 issues: in 300℃ above high temperature injection molding 时, material heat stabilized property issues. mechanism parts injection molding gate 往往都 comparison small (直径1mm left right), injection molding ultra- strong/high 剪切, 也进一步凸显 材 material heat stabilized property issues.

         lower 图A and B separation is Rear Cover injection molding 时经常出现 gate and 侧边流纹情况, although this defect obvious, non micro low. for/regarding machine this precision made parts, is 不允许.

         this appearance defect, remove injection molding process, mold gas and material water separation content factors outer, material high temperature heat stabilized property is most key/critical factors. in PC材 material in, effect/influence material heat stabilized property main/primary factors lower table/sheet 4 示:

         table/sheet 4: super tough PC材 material heat stabilized property effect/influence factors

        3PC材 material property can issues

        众 周知, PC材 material property can is comparison 差, especially is and ABS, PC/ABS versus ratio. PC材 material spray coating property can 差, main/primary and PC separation rigid property high, force large, easy force cracking, and paint strong/high has force combined separation has 关. type defect lower 图 示:

        手 machine industry for material tough property requirements non high, in paint spray coating 时, PC材 material is solvent agent function 导致部 product tough property 急剧衰 decrease. how to anti PC made parts spray coating rear tough property decline, is PC手 machine material development must 考虑 一 key/critical issues.

         lower 图A is different PC材 material paint solvent agent rear, cracks development 情况. can 见, selection combined PC raw materials, is development PC手 machine material conditions.

        ◆图A: different 厂家PC材 material chemical resistant product cracks 展现

        图B is different toughening agent toughened PC材 material, paint solvent agent rear, property can decrease comparison. can 见, different toughening agent selection is ensure material spray coating rear tough property excellent key/critical factors.

        ◆图B: different toughening agent PC材 material paint front rear tough property 变化

        4PC材 material resistant product property issues

        如 lower 图 示, PC chemical resistant product property 并不出 color, usually can through modified improve/increase meet/satisfy use requirements. this 里我们 focus/key point lower PC resistant product property.

        PC材 material chemical resistant solvent agent can force

        众 more from machine industry factory toward small introduction to, in machine property experiment/testing in, resistant product experiment/testing is difficult hard 骨头.

         remove experiment/testing cycle long, effect/influence factors more outer, product ultra- strong/high can force is key/critical causes, especially is BB霜 and anti 晒霜(small 编开始 is 整天往脸 upper 抹化妆 product 美眉们担心!).

         lower is machine rear housing/shell coating 敷化妆 product rear property comparison. from in can 见, combined 肥会通PC-4030 injection molding made parts, and experiment/testing made parts basic 看不出变化, 而市面 upper chemical resistant product excellent silicon PC材 material made parts 出现一定 color 变. this can can is is product in usually add has silicon type lubricated material, this category of material and silicon PC has versus property, easy 于侵蚀 to silicon PC材 material internal 而导致.

        ◆图: coating 抹化妆 product 存放48h rear color 变化图 sheet/slice

         combined 肥会通 using/adopting 特殊 添 add formed separation, has color chemical solvent agent resistant property, significantly improve/increase material resistant product property can, in industry 里广受赞誉.