Release paper, also known as silicone oil paper. It consists of a three-layer structure, the first layer: the bottom paper; the second layer: the film: the third layer: silicone oil. It can be used in electronic products, automobile foam, printing, food, medical and so on. In most cases, it is used with adhesive materials, especially adhesive tape.
In the wet production of prepreg, release paper is placed above and below the prepreg, and the lower release paper is attached to it as the prepreg is rolled, so the surface of the prepreg is usually protected by a layer of release paper. The role of the release paper is to prevent the prepreg from being contaminated, and it can provide convenience for marking the surface. Another function of release paper is to prevent the lateral cracking of unidirectional prepreg.
The release paper should meet: it can stick to the prepreg, but it is easy to separate the two; it does not chemically react with the resin system or pollute the resin system; when the environmental temperature and humidity change, the length and width of the release paper should be Keep the same, so as not to cause wrinkling of the release paper and wrinkling of the prepreg; it should have sufficient density to prevent moisture from entering the prepreg through it; the elongation of the release paper should be the same as that of the fiber after being pulled Be consistent to prevent prepreg due to the preparation process.
Features:
1. Cleanliness: refers to the cleanliness and cleanliness of the surface, because the production environment of release paper manufacturers is not the same, most of them are not dust-free studios. Due to cost issues, it is impossible to use dust-free studios. It is said that they are all ordinary factories, and better, there will be many improvements in environmental protection and environment, which will have an impact on cleanliness.
2. Degree of release: refers to the degree of release of release paper. There is no absolute value at this point. It depends on the formula of each manufacturer.
3. Peeling force: refers to whether it is easy to tear off the product, of course, there are strict test standards. Unsynchronized drafting causes deformation or twisting; its thickness and mass per unit area are not easily controlled accurately. The release paper is made of paper coated with anti-sticking material, and its model should be distinguished according to the difference in material, thickness, elongation, single and double sides.