There are many factors affecting PE self adhesive film. The first point is that the lower the crystallinity of the PE material, the lower the crystallinity, the better the adhesion, and the higher the crystallinity, the worse the adhesion. The degree of crystallinity reflects the density of the PE material from another angle. The second point is related to the flexural modulus of the PE material. The flexural modulus represents the softness of the PE material. The lower the flexural modulus, the softer the PE protective film, and the easier it is for PE low molecules to immerse into the surface of the object. It is more firmly attached to the object.
PE self adhesive is a new type of packaging material, the production process is simple, the film can be manually packaged or mechanically packaged, and the operation is convenient and simple. PE self adhesive film has good physical and chemical properties, a good PE self-adhesive protective film, less crystal points, good ductility, waterproof, dustproof, high transparency, excellent temperature resistance, non-toxic and tasteless, safe and environmentally friendly. Widely used in hardware products, plastic products, optoelectronic products.
The electrostatic film similar to the self adhesive film is also a kind of self-adhesive film. It has low adhesion, is used in high-gloss surface, and has the function of no glue and self-adhesive. It is an excellent high-end glossy film, which is adhered by electrostatic adsorption of the product itself. The protective effect of the article is generally used for the surface sensitive to adhesive or glue residue, and is mostly used for glass, lens, high-gloss plastic surface, acrylic and other very smooth surfaces.
PE self adhesive film is a common plastic product. It is produced by calendering process, extrusion process, blow molding process, etc. The film blowing method is to melt the raw material into a thin tube through the extruder. It is then inflated with compressed air and heated to form a film product.
After the material is extruded by plasticizing, it is formed into a tubular shape and then subjected to inflation molding, cooling, drawing and coiling. In the blow molding process, there are three methods of flat blowing, upper blowing and lower blowing depending on the direction of extrusion and traction. Each of the three processes of PE self adhesive film has excellent defects. The blown tube is hung on the cooling pipe, the traction area is small, the operation is convenient, and the protective film with large diameter and thick thickness is easy to produce; It is required to have high plant height and high cost, and it is not suitable for processing plastics with large fluidity, which is not conducive to the cooling of the protective film and low production efficiency.
Flat extrusion and blowing is beneficial to PE self adhesive film, high production efficiency, and can process plastics with large fluidity; the lack of extruder is higher than the ground, and the operation is not convenient. It is not suitable to produce thin PE self adhesive film. The flat-blown flat-blown head is center-type, the structure is simple, the PE self adhesive film thickness is uniform, the operation is convenient, the lead film is simple, and the inflation ratio can be large; but it is not suitable for processing the protective film with large relative density and large folding diameter.