Influencing factors and characteristics of PE self-adhesive membrane

- Aug 26, 2020-

In the field of protective film, PE self-adhesive film has special advantages. This kind of protective film is adhesive-free and self-adhesive, easy to use. In the current protective film industry, according to the classification of the viscous material of the protective film, it can be divided into glue type protective film and self-adhesive protective film. Each has its own advantages and disadvantages. Self-adhesive protective film is mainly used for high-quality appearance. Products, such protective films are generally multi-layer co-extrusion molding.

In fact, in the structure of PE self-adhesive film, the film of one layer is made of self-adhesive material, so it can be self-adhesive without applying glue during use. There are many self-adhesive materials, usually EVA or other modified materials are used for electrostatic film. The principle of electrostatic self-adhesion is actually because the self-adhesive material is a high polymer with low crystallinity. There are a lot of exposed molecular chains on the surface of the film. These molecular chains can easily fill the pores on the surface of the object to be adhered to each other. .

The bonding performance of the PE self-adhesive film will be affected by some factors, mainly: 1. The crystallinity of the PE material. Under normal circumstances, the lower the crystallinity, the better the adhesion, and the higher the crystallinity, the adhesion. The worse. Crystallinity reflects the density of PE material from another angle; 2. The flexural modulus of PE material, which represents the softness of PE material. The lower the flexural modulus, the softer the PE protective film. The easier it is to immerse into the surface of the object, the more firmly it will adhere to the object.

In fact, among the protective film products, PE self-adhesive film belongs to a new type of packaging protective film. The production process is simple. The film can be used for manual packaging or mechanical packaging, and the operation is convenient and simple. At the same time, this protective film product also has good physical and chemical properties, which can meet the requirements of different users. Generally speaking, a good PE self-adhesive protective film should have few crystal points, good ductility, waterproof, dustproof, high transparency, excellent temperature resistance, non-toxic, tasteless, safe and environmentally friendly.

From the analysis of market application, PE self-adhesive film has been widely used in packaging operations such as hardware products, plastic products and optoelectronic products. The quantity of the finished product is strictly reviewed before leaving the factory to ensure that the quantity, length, width and thickness are appropriate and used properly. PE electrostatic protective film has strict requirements for material preparation during field operation to ensure that it can be used under different conditions.

In practical applications, the bonding speed of PE self-adhesive film is one of its performance indicators, which is also an important factor to control cost and quality. The use speed depends on the degree of automation of the process equipment used. The crystal point of PE self-adhesive film products must be strictly controlled within the normal range, with no black spots, no fog, no wrinkles, and no ghosts.