塑料制品电镀前的表面处理工艺! - 行业动态

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塑料制品电镀前的表面处理工艺!

发布日期:2019-06-10 作者:www.edkiller.com 点击:

  预处理包括对塑料表面除油,即清洁油脂和脱模剂表面,活化塑料表面,以提高涂层的附着力。
  Pretreatment includes degreasing the plastic surface, i.e. cleaning the grease and release agent surface, activating the plastic surface to improve the adhesion of the coating.
  1. 塑料制品的除油
  1. Degreasing of Plastic Products
  与金属制品的表面脱脂相似,塑料制品的脱脂也可以用有机溶剂或含有表面活性剂的碱性水溶液进行清洗。有机溶剂除油适用于清除石蜡、蜂蜡、油脂等塑料表面的有机污垢。使用的有机溶剂不应溶解、膨胀或开裂塑料,因为塑料沸点低,易挥发,不燃。
  Similar to surface degreasing of metal products, degreasing of plastic products can also be cleaned with organic solvents or alkaline aqueous solutions containing surfactants. Organic solvent degreasing is suitable for removing organic dirt on plastic surface such as paraffin, beeswax, grease and so on. Organic solvents used should not dissolve, expand or crack plastics because of their low boiling point, volatility and non-flammability.
  碱性水溶液适用于耐碱性塑料的除油。该溶液含有苛性钠、碱性盐和各种表面活性物质。常用的表面活性材料为OP系列,即烷基酚聚氧乙烯醚,它不形成泡沫,也不停留在塑料表面。
  Alkaline aqueous solution is suitable for degreasing of alkali-resistant plastics. The solution contains caustic sodium, alkaline salts and various surfactants. The commonly used surface active material is OP series, that is, alkylphenol polyoxyethylene ether, it does not form foam, nor does it stay on the plastic surface.
济南塑料袋
  2. 塑料制品表面活化
  2. Surface Activation of Plastic Products
  这种活化是为了提高塑料的表面能,即在塑料制品表面形成一些极性基团或被粗化,使涂料更容易在制品表面润湿和吸附。表面活化的方法有化学氧化法、火焰氧化法、溶剂蒸气蚀刻法和电晕放电氧化法。
  The purpose of this activation is to improve the surface energy of plastics, that is, to form some polar groups on the surface of plastics products or to be coarsened, so that coatings can be more easily wetted and adsorbed on the surface of products. Surface activation methods include chemical oxidation, flame oxidation, solvent vapor etching and corona discharge oxidation.
  其中,化学晶体氧化处理方法得到了广泛的应用,铬酸处理溶液得到了广泛的应用。典型配方为重铬酸钾4.5%,水8.0%,浓硫酸(96%以上)87.5%。
  Among them, chemical crystal oxidation treatment method has been widely used, and chromic acid treatment solution has been widely used. Typical formulations are potassium dichromate 4.5%, water 8.0%, concentrated sulfuric acid (over 96%) 87.5%.
  一些塑料制品,如聚苯乙烯和ABS塑料,可以不经化学氧化处理直接涂覆。
  Some plastics, such as polystyrene and ABS plastics, can be directly coated without chemical oxidation treatment.


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