We often see release paper, which is actually isolation paper. It is a type of paper that prevents the adhesion of prepreg and also protects the prepreg from contamination. There are many types of release paper, usually divided into plastic release paper and non plastic release paper. In addition, it can be divided into organic silicon release paper and non silicon release paper according to the release agent. So what conditions do we need to meet when making release paper?
1、 It should be able to adhere to the prepreg, but it should be easy to separate the two;
2、 Not reacting chemically with the resin system or contaminating the resin system;
3、 After being pulled, the elongation of release paper should be consistent with the fiber to prevent deformation or distortion caused by asynchronous stretching during the preparation process of the prepreg. However, in general, its thickness, unit area, and mass are not easily controlled accurately;
4、 It should have sufficient density to prevent water from passing through it and entering the prepreg;
Release paper, also known as silicone oil paper or anti stick paper, is mainly used to isolate sticky objects. Release paper mainly has the following characteristics:
Moisture and temperature resistance of the first release paper. Release paper contains silicone oil, which has a certain degree of temperature resistance, but this mainly depends on the use of the product and the choice of domestic and imported silicone oil. Generally, the temperature of silicone oil can reach around 150 degrees.
Peeling force of the second release paper: Peeling force refers to whether the product can be easily torn off, although there are strict testing procedures. Small slitting machines are currently mainly used internationally according to national standards. The unit of peeling force is grams. According to the different test results, it is generally divided into three procedures: light release, medium release, and heavy release. Light release refers to the ability to easily peel off when the release paper and tape protective film are attached, while medium release is not easy to peel off, while heavy release is difficult to peel off. The cleanliness of the third release paper actually refers to the cleanliness and cleanliness of the appearance. Because the working environment of release paper manufacturers is different, it is almost impossible to find them in a dust-free workspace. Generally, a better factory has significant advantages in environmental protection and environmental protection, as these can have an impact on cleanliness. Many release paper cleanliness is not contaminated during the production process. This is largely due to the low cleanliness of the slitting manufacturer during slitting, Dust only appears when electrostatic adsorption occurs.
5、 Even when the temperature and humidity of the environment change, the length and width of the release paper can remain unchanged, thereby avoiding the pre impregnated material wrinkling caused by the release paper wrinkling.