Polyethylene is widely used in households, and for many it has become a necessity. This material is inexpensive and unpretentious. However, its owners sometimes face a difficult problem - how to glue the polyethylene? Let's say you need to repair a product or attach film joints. Conventional adhesives will not cope here, because the surface of this type of plastic has poor adhesion (adhesion). But it is still possible to solve this problem.
It is necessary
- - double sided tape;
- - soldering iron or iron;
- - two metal plates;
- - cotton cloth;
- - chromic anhydride or chromic peak;
- - BF-2 glue (phenolic butyral);
- - glue for polyethylene;
- - individual protection means.
Instructions
Step 1
Connect the seams of the plastic wrap with double-sided tape. This is the easiest and fastest way to attach parts from this material to each other. However, do not rely on the glued parts to withstand heavy loads.
Step 2
Weld polyethylene - perhaps the most common way to join film parts. It requires caution, since during heat treatment you risk spoiling the material. Three proven methods can be recommended: - Place both sides of the polyethylene to be bonded between two metal plates so that the edges of both parts protrude slightly. Run a soldering iron over them - the metal will prevent the plastic from curling up. Also, if necessary, you can make a polyethylene patch by thermally treating the edges of the parts to be welded; - use an iron heated to the hottest temperature. In this case, the parts should be overlapped (at least 1-1.5 cm). Lay flat strips of cotton fabric under the seamy layer of the film and on top and iron them; - You can connect the polyethylene parts by dripping molten plastic onto their joint. In this way, you can repair not only the film, but also other plastic items.
Step 3
Find the right plastic adhesive. The vast majority of adhesives will not work for you. Some mixtures can be used, but only after preparing the plastic surface - it should become more active. To do this, you will have to equip a "mini-laboratory". So, after applying a solution of chromic anhydride (25%) to polyethylene, you can use BF-2 glue. You can get the specified chromium preparation in chemical stores or from familiar chemists. You can replace it with a chrome pick.
Step 4
Try a special polyethylene adhesive such as DP 8005 (structural adhesive for plastics) or WEICON Easy-Mix PE-PP (structural adhesive for polyethylene and polypropylene). The peculiarity of such compositions is that there is no need for preliminary processing of the material. The mixture changes the structure of the polyethylene surface, after which it adheres normally.
