A kind of method for directly plating conductive metal on polyethylene surface

Abstract

The invention discloses a method for directly plating conductive metal on the surface of polyethylene. Polyethylene microparticles are placed in a degreasing solution at 30-70°C for 3-8 minutes; after degreasing, they are placed in a roughening solution at 62-80°C. React for 5-15 minutes; put it in the reducing solution after coarsening, and react for 1-3 minutes at 20-50°C; 100ml / LPd / Sn colloid, 20~40℃, react for 5~20min; after activation, put it in the metal replacement solution, 20~60℃, react for 5~10min; after metal replacement, put it in the electroplating solution, 20~50℃ , Current density 0.5 ~ 8A / dm2 for electroplating. The invention avoids the disadvantages of time-consuming, high cost and non-environmental protection of traditional electroless plating, and successfully realizes direct electroplating on the surface of polyethylene.

Description

technical field [0001] The invention relates to the field of plastic electroplating, in particular to a method for directly plating conductive metal on the surface of polyethylene. Background technique [0002] Plastic electroplating refers to covering the plastic surface with a layer of metal. Compared with metal parts, plastic electroplating products can not only achieve a good metal texture, but also reduce the weight of the product. While effectively improving the appearance and decoration of plastics, it is also It improves its performance in terms of electricity, heat and corrosion resistance, and improves its surface mechanical strength. [0003] Because plastic itself is not conductive, it is more difficult to electroplate than ordinary metals. The general plastic electroplating process includes the following procedures: [0004] (1) Degreasing: remove the dirt and fingerprints left in the plastic molding process; [0005] (2) Coarsening: roughen the plastic surfac...

AI Technical Summary

Problems solved by technology

[0010] Electroless plating is a method with high efficiency and low price, but it has the following problems: 1) The chemical plating solution often contains difficult-to-handle complexing agents such as EDTA or triethanolamine; 2) Contains carcinogen formaldehyde; 3) Process The stability is poor, and the coating is prone to pitting

However, polyethylene is very sensitive to environmental stress (chemical and mechanical action), has poor heat aging resistance, and low heat resistance (heat distortion temperature)

At the same time, due to the low polarity and low surface energy of polyethylene molecules, surface modification is difficult.