Shanghai Daoqin Plastics Co., Ltd.

         plastics products surface treatment main/primary coating by 覆处理 and plating by 覆处理. generally plastics crystallization degree relatively large, property relatively small or property, surface can low, this effect/influence coating by 覆 附 force. due to plastics is types conductive insulation 体, therefore can 按一股 electroplating process specification in plastics surface plating by 覆, therefore in surface treatment front, 应进行 necessary front 处理, improve/increase coating by 覆 结 combined force and is plating by provide tool has good combined force conductive 底层.

        1, coating by front 处理

         front 处理包括 plastics surface remove 油处理, 即清洗 surface and demolding agent, and plastics surface active 化处理, is improve/increase coating by 覆 附 force.

        1, plastics products remove 油

         and metal products surface remove similar, plastics products remove can use has machine solvent agent or use surface active property agent alkali property water solvent liquid remove 油. has machine solvent agent remove suitable for from plastics surface 清洗石 wax, wax, and other has machine property 污垢, use has machine solvent agent for plastics solvent understanding, solvent 胀, crazing, its 本身沸点 low, easy 挥发, 无毒且不燃.

         alkali property water solvent liquid suitable for resistant alkali plastics remove 油. solvent liquid in has property 钠, alkali property salt and various surface active property material 质. most commonly used surface active property material is OP series, 即烷基苯酚 poly oxygen ethylene ether, it 不会形 formed foam, 也不残留 in plastics surface upper.

        2, plastics products surface active 化

         this type of active is is improve/increase plastics surface can, in plastics surface formed 一 极 property or add coarse 化, make coating material more easy lubricating wet and 吸附于 made parts surface. surface active 化处理 methods very more, chemical product oxidation method, oxidation method, solvent agent gas method and electrical electrical oxidation method and other. its in most use is chemical oxidation method, method commonly used is acid liquid, its type formulation is heavy acid 钾4.5%, water 8.0%, concentrated acid (96% above)87.5%.

         has plastics products, polystyrene (PS) and ABS plastics and other, 未进行 chemical product oxidation 处理时也 can 直接进行 coating by 覆. is obtain high quality coating by 覆, has use chemical product oxidation 处理, 如ABS plastics in rear, can using/adopting relatively dilute acid liquid 浸蚀, its type formulation is acid 420g/L, acid (specific gravity 1.83)200ml/L. type process is 65℃70℃/5min10min, water 洗净, drying.

         use acid liquid advantages is plastics products more complex, can uniform, its disadvantages is as has 危险, has issues.

        2, plating by front 处理

         plating by front 处理 目 is improve/increase plating and plastics surface force and make plastics surface formed conductive metal 底层. front 处理 工序 main/primary has: machine coarse 化, chemical remove 油, chemical coarse 化, 敏化处理, active 化处理, also 原处理 and chemical 镀. its in front is is improve/increase plating force, rear is is formed conductive metal 底层.

        1, machine coarse and chemical coarse 化

         machine coarse and chemical coarse 化处理 is separation use machine methods and chemical methods make plastics surface coarse, increase plating and 基体 接触面积. generally is, machine coarse can to combined force is chemical coarse 化 10% left right.

        2, chemical remove 油

         plastics surface plating by front remove methods and coating by front remove methods same.

        3, 敏化

        敏化 is make tool has 一定吸附 can force plastics surface upper 吸附一 easy oxidation material 质, chlorine 化锡, chlorine titanium and other. this by easy oxidation material 质, in active 化处理时 by oxidation, active agent by also formed catalytic 晶核, in products surface upper. function is is rear chemical metal 层打基础.

        4, active 化

         active is 借助于 use catalytic active property metal combined material solvent liquid, for 经 敏化 surface 进行处理. its is will has also agent products 浸入含 has metal salt oxidation agent water solvent liquid in, is metal as is oxidation agent by S2+n also 原, also 原 贵 metal 呈胶体状 micro 粒沉积 in products surface upper, it tool has relatively strong/high catalytic active property. will types surface chemical solvent liquid in 时, this micro formed is catalytic in 心, make chemical reaction speed degree add fast.

        5, also 原处理

        经 active 化处理 and use water rear products in chemical front, use concentrated degree chemical use also agent solvent liquid will products 浸渍, will 未洗净 active agent also remove 净, this is also 原处理. chemical copper 时, use aldehyde solvent liquid also 原处理, chemical 镀镍时 use acid solvent liquid also 原处理.

        6, chemical 镀

         chemical 镀 目 is in plastics products surface formed conductive metal film, to plastics products electroplating metal 层创造 conditions, therefore chemical is plastics electroplating key/critical property steps.