Shanghai Daoqin Plastics Co., Ltd.

1.9.1 front 言摩托车(踏 sheet/plate 车) outer table/sheet trim parts 80% above is using/adopting ABS plastics products, therefore its coating quality effect/influence 摩托车 market competition force. for ABS plastics products front and coating process introduction, analysis discussion due to ABS plastics 材质 特殊 property for its front and coating 装 一 特殊 requirements. 1.9.2 surface features ABS（ acrylonitrile, butadiene and styrene terpolymer ） thermoplastic property resin type plastics, tool has relatively high machine strong/high degree and good processing properties, its hardness low, weather resistant, resistant solvent agent property 差, can through plastics surface processing improvement. coating is plastics surface processing important methods 之一. ABS plastics in coating 装时常出现附 效果不 good, light, and other issues, its causes main/primary has, surface force （ small 于100mN/cm）, solvent understanding degree parameters and coating material in resin, solvent agent solvent understanding degree parameters relatively large, in molding generate internal stress easy generate film cracks or reduce coating gloss and other defect, surface easy generate electrical and 吸附灰尘, effect/influence coating 装效果. 1.9.3 surface front plastics surface 油污会极 large reduce coating material force, in has film agent （ hard acid salt, wax, polyethylene (PE) alcohol and other ）, additives （ increase agent, anti-static agent, lubricant, anti agent, anti agent ）, other （ lubricated 油, 灰尘） and other. 1.9.3.1 处理 methods （1）手工 scratch method this type of methods strong/high degree large, usually used for output/production volume low 情况. scratch 试弊病 very more, due to causes, quality unstable, already scratch 脏 布会导致 plastics surface again 次污染, but also solvent agent for as has 害, ring 境. （2） solvent agent gas method methods can has remove surface 油污, film agent, anti-static agent and other low interface 层, make surface coarse more 孔, from improve/increase coating material force. high temperature as 业不利于 safety production. （3） water solvent liquid method water solvent liquid method especially combined output/production volume large, production efficiency high 情况, this type of methods tool has quality stability, ring 境危害 light, cost low, easy as and other advantages, positive in 逐渐取代 upper types methods. 1.9.3.2 process process/workflow 预脱脂→脱脂→ one-time water 洗→二次 water 洗→ 离子 water 洗→ active 化→吹 dry → water separation dry （70～75℃, 15min）ABS plastics products front can water production, 各工序 full using/adopting 喷淋处理并 through 悬链运送, equipment using/adopting anti 尘室体 structure. 1.9.3.2.1 脱脂 generally using/adopting has surface active property agent water 系脱脂 agent 喷淋清洗, time 2～3min, pressure 20～30PSI, temperature degree 45～55℃. formulation has acid salt, silicon acid salt, surface active property agent, machine material and other. agent in heavy use 时, liquid in 杂质, material 积累, formed plastics surface material again 次附, effect/influence coating quality, therefore add strong/high liquid and more new tube/pipe 理. water 系脱脂 agent 脱脂效果 good, quality stability, its waste water in has 磷. meanwhile it is types product, for low carbon 钢材质 槽体 and equipment internal must 衬玻璃钢, long equipment use lifespan. for upper 述两点, using/adopting 不锈钢 structure equipment and 槽体, increase equipment use lifespan, front waste water must 治理达标 rear can 排放. 1.9.3.2.2 active active is using/adopting has water property polymer/macromolecule water table/sheet agent process, can room temperature methods, time 1min, pressure 7～14PSI. active function has remove hard water, water plastics surface is hydrophilic water surface, in plastics surface formed uniform film, thick degree ultra- 5nm, its coating material for plastics surface lubricating wet property and force. active rear need use pressure shrink gas dry, in 70～75℃烘 dry 15min. 1.9.3.3 surface degree plastics surface treatment rear must its degree 检查, ensure rear coating quality. （1）观察接触角 in rear plastics surface upper liquid 滴, full 铺展说明处理效果 good, 接触角 small. （2） water lubricating method will rear plastics products water in, rear water film property. （3）测定 coating force using/adopting 《GB9286-88 color and 清漆漆 film experiment/testing method 》, if force 差, troubleshooting coating material, ring 境, is as and other other issues, can can is plastics surface 未清洗 dry 净. 1.9.4 coating due to plastics surface structure, although through surface front for plastics surface modified, remove low interface 层, active plastics surface, increase coating film force, coating material selection, coating process and coating ring tube/pipe 理也会 effect/influence coating quality. 1.9.4.1 coating material coating material selection must from " versus versus solvent 原则", ensure ABS and coating material resin, solvent agent mixed solvent property good, make coating film and plastics surface formed very thin solvent 层, reinforcement viscous force. ABS coating more using/adopting acrylic or polyurethane ester coating material. is obtain excellent decoration property coating, generally use di separation polyurethane ester spray coating 2～3次, 流平5min rear, again wet wet spray coating di separation polyurethane ester 面漆. ABS plastics surface solvent understanding degree parameters is 9.6, polyurethane ester solvent understanding degree parameters is 10.0, acrylic solvent understanding degree parameters is 9.4, 显然, this types coating material system and ABS底材 solvent understanding degree parameters, surface force property relatively good, in ABS底材 upper tool has good lubricating wet property and property. 1.9.4.2 coating 装ABS products heat deflection temperature (HDT) is 75～107℃, 且ABS products surface electrical retardant high, easy generate electrical, 吸附灰尘, therefore front generally using/adopting 离子化空 gas remove 尘. coating process process/workflow: surface front ABS products →离子化空 gas remove 尘→空 gas spray coating 底漆→流平5min→空 gas spray coating 面漆→流平10min→烘 dry （70～75℃, 30min）. 手工空 gas spray coating process coating efficiency has 20%～30% left right, coating material loss large, plastics products use amount large degree improve/increase, 建议批 amount large ABS plastics products 采取静 electrical spray coating process. electrical spray coating front must use 离子化空 gas remove electrical （AS-20 type 延伸排列 electrical gas remove device electrical in and can force strong/high ）, rear using/adopting alcohol type solvent agent for its surface conductive property 处理, reduce its surface electrical retardant, meanwhile, electrical spray coating requirements control coating material electrical retardant and viscosity, usually coating material electrical retardant value most scope/range in 35～45MΩ, coating material viscosity relatively gas spray coating low 2s. using/adopting electrical spray coating coating efficiency can to 90% left right, coating efficiency 计算公式 value attention/notes is, ABS plastics coating rear, film surface easy generate fine micro cracks, its causes very complex, currently comparison toward and plastics processing generate internal stress or is and solvent agent rear table/sheet 层体积 shrinkage generate force has 关. plastics cracking force and plastics inner poly can, coating material use solvent agent type type, solvent agent speed degree, temperature degree between in versus 互关系, solvent agent fast, easy generate force, easy generate cracks. therefore, in selection coating material solvent agent 时, will high and low solvent agent ratio use, meanwhile selection drying methods, control solvent agent speed degree, decrease/reduce drying process in generate force. 1.9.4.3 tube/pipe surface treatment rear products fast coating 装, meanwhile add strong/high coating ring 境清洁 degree tube/pipe 理, 采取适当 anti measures, ensure coating 装周围 ring 境 清洁 degree. （1）喷漆室 remove generally 每周检查, 清理喷漆室1次, ensure 喷漆室 inner speed stability, electrical 喷漆室风 speed is 0.2～0.3m/s. according to output/production volume 进行定期 检查, and more 换喷漆室送, system inner material. （2）烘 dry remove 尘 每周 for dry internal 进行清扫, according to specific production 情况定期检查, 清理 滤 device. （3）现场清洁 每天清理 production 现场, ensure workshop inner 尘埃许 can degree control in 尘埃粒径5μm以 inner, 尘埃 数300 /cm3 below/following. 1.9.4.4 ABS coating property can according to 摩托车ABS plastics products coating quality requirements, polyurethane ester di separation and acrylic can meet/satisfy ABS plastics products coating quality requirements, polyurethane ester di separation in hardness and weather resistance more tool has advantages, especially combined high type. polyurethane ester di separation and acrylic property can testing comparison table/sheet 1-9-1. 1.9.5 结论ABS plastics products coating already in 摩托车 industry to application, its front large separation injection molding parts processing still 以手工 scratch and solvent agent method combined use, film 常出现 cracking, property and other issues. for 此, system introduction ABS plastics products coating front and coating 装 一 process requirements, amount large product can 采取静 electrical spray coating process, improve/increase coating efficiency, reduce coating 装公害; high type selection polyurethane ester di separation 漆.