Polyolefins such as PP and PE materials, the surface energy is very low, usually only 30-34 dyne. To achieve good bonding, general requirements for the surface energy of not less than 40 dyne. Bonding tests showed, PE in the adhesive strength after plasma treatment can be increased by 10 times; after chromic acid treatment, adhesive propertiescan be increased about 5 times. Through the same process, PP ionization process inadhesive strength after the date by 200 times, and in the chromic acid treatment will be increased 600 times.
Or copolymers of various compounds, the material composition will also affect the choice of surface treatment. For example, fluoropolymer and polyolefin copolymer surface is lowerthan the typical range of 18-26 dyne. For the fluorine resin such as PTFE Coated Glass Fabric Tape, after etchingthrough the adhesive properties of sodium naphthenate increased by 10 times, and afteroxygen or argon plasma treatment only increased by 3 times. PE is with the contrary trend.
However, fluorine resin and PE copolymers by plasma treatment or sodium naphthenateincreased adhesive properties are treated as 10-fold. It can be seen, plasma processingmore and play a role in PE, and naphthenic acid and sodium fluoride treatment is moremajor role in the resin occurred. It can be seen, by copolymerization of different materialscan improve the material's processing performance. For the different components of the copolymer, the characteristics of the material also needs to select the appropriatetreatment.