The application range and coating performance of high-temperature resistant protective film are key to production

The application range of high-temperature resistant protective film.
1. Electrochemical aluminum hot stamping (hot stamping) is a special printing process that does not use ink. With the help of a certain pressure and temperature, it is applied to the template installed on the hot stamping machine, causing the printed product and hot stamping foil to press each other in a short period of time. The metal foil or pigment of the infinite UV power supply is transferred to the surface of the product by hot stamping according to the image and text of the hot stamping template, commonly known as hot stamping. Here, plastic film (hot stamping film) is only used as a carrier.
2. Printing composite films, in order to enhance packaging effectiveness and barrier performance, achieve complementary performance and adapt to sealing needs, often use paint spray gun printing composite films as packaging materials. Composite methods include dry composite, wet composite, extrusion composite, co extrusion composite, etc.
3. Vacuum aluminum coating. Vacuum aluminum coating is made by using a special process to evaporate an extremely thin layer of metal aluminum on the surface of high-temperature resistant PET protective film, which gives the film a metallic luster and greatly improves its barrier properties. Therefore, vacuum aluminum coating has been widely used in the packaging of food, medicine, and industrial products.
4. Card protection film: The card protection film is made of high-temperature resistant PET protective film as the substrate, and is extruded and coated with a layer of hot melt adhesive (such as EVA) that can be heat sealed. It is used for protecting the surface of various documents, including ID cards, document archives, photos, etc.
In the packaging industry, there is a special protective material called surface protective film. It is applied to various metal plates, plastic plates, glass, and other surfaces to protect the fine surface of items during transportation, processing, storage, and use. This requires high-performance pressure sensitive protective adhesive/acrylic adhesive/PU adhesive.
The viscosity and other rheological properties of adhesives are important properties that affect the coating behavior of surface protective films. According to the dependence of viscosity on shear rate, fluids can be distinguished into three types: Newtonian fluid, expansion body, and pseudoplastic body. According to the variation of viscosity shear time, fluids can also be divided into Newtonian fluid, thixotropic body, and rheological body. The rheological properties of adhesives deviate more from Newtonian fluid, The easier it is to encounter various quality issues during the coating operation.
The key to producing surface protective films is to choose the appropriate coating method and coating machine based on the coating performance of the protective film and the specific requirements for the protective film, and determine the various process parameters of the coating machine operation.