The structure of release paper
Anti - stick paper, also known as silicone paper. Composed of three layers, the first layer: substrate; The second layer: film: the third layer: silicone oil. Can be used in electronic products, automotive foam, printing, food, medical and so on. In most cases, it is used with adhesive materials, especially adhesive tape.
In wet prepreg production, release paper is placed above and below the prepreg, in which the lower release paper is coiled with the prepreg, so the prepreg surface is usually protected by a layer of release paper. The role of release paper is to prevent prepreg pollution, but also to provide a convenient line on its surface. Another function of release paper is to prevent transverse cracking of unidirectional prepreg.
Release paper should meet: can adhere to the prepreg, but it is easy to separate the two; Do not react with the resin system or contaminate the resin system; When the ambient temperature and humidity change, the length and width of the release paper should remain unchanged, so as not to cause the release paper wrinkling and make the prepreg crumple; Should be dense enough to prevent water from passing through it into the prepreg; The elongation of the release paper after traction should be consistent with the fiber to prevent the deformation or distortion of the prepreg due to the asynchronous drafting in the preparation process. Its thickness, unit area mass is not easy to control accurately.