What is the maintenance method of the production process of PE heat shrinkable film?

PE heat shrinkable film is a common material on the market, and it is available in all walks of life. Regardless of the type of protective film, it must be protected for performance and quality. If the PE heat shrinkable film is not properly maintained, it will damage the surface and affect normal use. Of course, please pay attention to the maintenance method when using it, and avoid contact with strong alkali solution, otherwise it will easily destroy the components on the surface of the PE heat shrinkable film.

The adhesion between the PE heat shrinkable film and the protective equipment is weak, and it falls off due to washing during transportation and use. It is very likely that the output of the photosensitive adhesive used in the heat shrinkable film is insufficient. Another possibility is that the user's pressure on the post-molding machine is insufficient, or there is dust and paint on the surface of the profile, which affects the sticking effect of the photosensitive adhesive. We can use a clean cloth dipped in a little alcohol to repeat the rubbing test on the PE heat shrinkable film. Before the sensitive rubber is wiped clean, be careful not to apply too much force during the friction test, which may affect the gloss of the PE heat shrinkable film. When there is dust on the surface of PE heat shrinkable film, do not rinse with water. There is also the fact that once the oil comes out, the material of the heat shrinkable film will not only be lost, but also unable to protect the item. Therefore, oil pollution is prohibited.

PE heat shrinkable film performs well after a period of use on the way, but at both ends of the wing, this phenomenon is the main reason. During the pasting process, the protective profile on the PE heat shrinkable film is drawn very deep, and cleaning in a high temperature environment after pasting is an unnecessary shrinkage phenomenon. Therefore, in the production process of PE heat shrinkable film, attention should be paid to the influence of ambient temperature on the use of the product to avoid unnecessary surface tension when pasting.

During the process of processing, storage and use, the PE heat shrinkable film will fade, embrittle, crack and so on under the action of light, heat and oxygen. In order to alleviate the aging phenomenon of PE heat shrinkable film, it is necessary to add stabilizer.

What is important to prevent thermal aging is thermal stabilizer, and what is important to prevent oxidative aging is antioxidant. What is important to prevent photoaging is light stabilizers, collectively referred to as stabilizers. At present, the PE heat shrinkable film stabilizer with excellent performance is methyl tin heat stabilizer, which is very effective for calendering, extrusion molding, injection molding and blow molding of rigid polyethylene. In addition, due to its high safety, it is especially used in food packaging and high-resolution rigid polyethylene products, and is also widely used in plastic doors and windows, tap water and decorative materials to replace other more toxic plastic heat stabilizers.

The PE heat shrinkable film material is a white powder with an amorphous structure, a small degree of branching, a relative density of about 1.4, and begins to decompose when the glass transition temperature is about 77~90 and 170, and has poor stability to light and heat. Under exposure to the sun for more than 100 or a long time, it will decompose to generate lv hydrogen hydride.