Shanghai Daoqin Plastics Co., Ltd.

made as electrical 脑键盘键帽 commonly used material has ABS, POM and PBT, as is 键帽, types material large small 异, lower:

1, ABS is acrylonitrile-butadiene-styrene (ABS) copolymer, type thermoplastic property plastics. as is 键帽材 material, ABS键帽指尖触感独特, but also ABS键帽二 color molding technology process make upper 字体永不褪 color （ its it has use rear, upper and 数字褪 color 看不清）. is, ABS吸 wet property relatively large but also versus for soft, therefore use relatively long time rear surface by 手指打 abrasion separation light 亮（键帽 by abrasion 平）, 俗称打油, this is ABS材 material disadvantages. is ABS材 material wet property relatively high, PMMA>ABS>PC>PP, processing front material wet degree small 于0.1%, therefore requirements in processing front for ABS材 material drying 处理. drying conditions is 80~90摄氏 degree lower drying less 于2 small 时.

2, PBT is polybutylene terephthalate (PBT) shrink 写, crystallization property thermoplastic property plastics, most tough engineering thermoplastic material 之一, viscous property low （ crystallization speed degree fast ）. comparison ABS, PBT吸 wet features low, PBT材 material relatively ABS hard, therefore PBT键帽 can 克服ABS键帽打油 disadvantages, is PBT键帽手感会感觉生 hard （因人而异）, but also PBT price versus for ABS high. 据悉, PBT材 material made as black light 刻蚀键盘视觉效果 comparison 差, therefore can using/adopting POM材 material. another pure PBT shrinkage rate relatively high, generally use glass fiber reinforcement rear, shrinkage rate obvious reduce.

3, POM即 polyoxymethylene (POM) shrink 写, types crystallization property thermoplastic property plastics, wet property low, shrinkage rate high （ high crystallization degree ）. POM材 material made as 键帽手感 and hardness non excellent 良, but also black light 刻蚀键盘视觉效果良 good （PBT无 method achieve ）, is POM price high 于PBT.