Overview of Release Film Coating Process and Key Product Characteristics

Introduction: In modern industrial production, release film, as an important functional material, is widely used in industries such as electronics, packaging, and printing. It can prevent the adhesive from sticking to other objects in advance without heating or pressure, thereby maintaining its flexibility and convenience of use. This article will provide a detailed introduction to the coating process of release film and the key characteristics of the product, in order to help readers better understand this technology and its applications. What is a release membrane? Release film, also known as isolation paper or anti stick paper, is a thin film with easy peeling performance after special surface treatment. Its main function is to easily separate items with glue from the substrate during use, without the occurrence of residual glue. According to different needs and applications, release films can be made of various materials and thicknesses, such as PET (polyethylene terephthalate), PE (polyethylene), etc. The coating process of release film 1. Selection and preparation of substrate The first step is to select a suitable substrate for processing. The substrate can be glass, metal foil, plastic sheets, or other suitable materials. Then perform pre-treatment steps such as cleaning, degreasing, and drying on these materials to ensure that the surface is clean and free of oil residue. 2. Preparation of coating solution: According to the formula requirements, prepare the raw materials of the coating solution, including silicone oil, solvents, stabilizers, and other additives. Then mix these ingredients evenly in a specific proportion to form a coating solution. 3. During the coating process, the coating liquid is evenly applied to the surface of the substrate through a roller or nozzle. This process usually needs to be completed under certain temperature and humidity conditions to ensure that the coating can be fully wetted and cured. After the completion of curing and drying coating, the coating needs to be cured and dried. This can be achieved through hot air circulation systems, infrared irradiation, and other methods. The purpose of curing is to enhance the wear resistance, aging resistance and adhesion strength of the coating. 5. Finally, strict quality inspection should be carried out on the finished product to ensure that each batch of release film meets the specified standards. Quality control mainly includes visual inspection, dimensional measurement, tensile testing, friction coefficient detection, and other aspects. Key feature of the product: 1. Release force Release force refers to the amount of adhesive force that the release film resists on the back of the tape or label during the peeling process. The ideal release film should be able to achieve good peeling effect under appropriate time and pressure. 2. Opacity/transmittance is crucial for certain specific applications, such as optical protective films and release films. Higher opacity means better shading effect; Higher light transmittance is suitable for situations that require light transmission. 3. Smoothness affects the difficulty of labeling and the visual effect of the final product. An excessively rough surface may result in uneven or even torn labels. Therefore, the surface of the release film must be sufficiently smooth. 4. High temperature resistance: Products that work in high temperature environments, such as internal components of electronic products, need to have excellent high temperature resistance. This means that even under extreme temperature changes, the release film can maintain stable physical properties. 5. Chemical stability considers environments that may come into contact with various chemicals, such as cleaning agents, lubricants, etc. The release film should also have good chemical stability to avoid being eroded by these liquids and losing its effectiveness. The production of release films involves complex process flows and technical parameter adjustments, and product quality directly affects the performance and user experience of downstream products. With the continuous progress and development of technology, we believe that in the future, we will see more high-performance and multifunctional release film products appearing in the market.