New method for bonding steel and nonpolar plastics

The invention discloses a method of sticking the polyethylene and steel pipe. To produce the steel pipes which is wrapped by polyethylene, besmear the heat polyethylene on the outer surface of the inner polyethylene, then insert into the steel pipe, send into the stove which is used to paste no polarity plastics. It is composed with heat stove and clamp, its character is: long rectangle, double stove wall, a air heat domain exits between the inner wall and the outer wall, heat thread is set in it; there are several resist heat fans are arranged on the top of the stove on the axis direction, open intake according to the stove inner wall and the fans; the bottom of the stove have several intakes on the axis direction; the two sides of the stove also have two gates which can be opened and be closed. The heat thread is set and power supply in segment, and the heat power can be regulated in segment. The clamp is open in one end and close in another end, the open end has column, the close end has a entrance for compress air, between the two ends is taper. A heat glue is besmeared on the outer surface of the steel pipe, then besmear the heat polyethylene outside the glue. This invention can paste no polarity plastics pipe in the steel pipe, wrap no polarity plastics out of the steel pipe, produce the steel pipe with plastics inside and outside of it.