Standard Practice for Application of Electrical Discharge Surface Treatment (Activation) of Plastics for Adhesive Bonding

Importancia y uso:

5.1 Bonding of many polymeric substrates presents a problem due to the low wettability of their surfaces and their chemical inertness. Adhesive bond formation begins with the establishment of interfacial molecular contact by wetting. Wettability of a substrate surface depends on its surface energy. The surface activation with electrical discharges improves wettability of polymers and subsequent adhesive bonding. The surface activation with electrical discharges results in addition of polar functional groups on the polymer surface. The higher the concentration of polar functional groups on the surface the more actively the surface reacts with the different polar interfaces.

5.2 To achieve a proper adhesive bond the polyolefin substrate's polar component should be raised from near zero to 15 to 20 mJ/m².

5.3 The pre-treated surfaces are ready for application of the adhesive immediately after the treatment.

Subcomité:

D14.40

Volúmen:

15.06

Número ICS:

83.140.01 (Rubber and plastic products in general)

Palabras clave:

discharge; corona treatment; modification; polymer; surface; surface treatment;