Fourth, the application of film in modern industry 2. Paint surface steel plate 3. Stainless steel sink 4. Aluminum outer wall material 5. Colored steel roofing materials 2. Profiles, window frames, frames 3. Metal panel panel surface transportation 4. Resin molded products 2. Other protection, electroplating printing, coating No. Item Specification 3. Application of protective film on color tube screen No. Item Specification From the above two examples, it can be seen that the performance of different protective films varies greatly, and the difficulty in the manufacture of protective films is evident.
1. Application of protective film in modern industry
The development and application of protective films mainly took place in Japan, the U.S., and European countries in the early 1970s. After decades of development, it has been widely used in machinery, instrumentation, electronics, shipbuilding, building materials, and automobile manufacturing industries. application. China started in the early-to-mid 1980s and grew up in the early 1990s. Therefore, there is a certain gap between the basic research, the production technology, and the application of protective film LL. Such as the developed countries, the protective film is only divided into several dozens of substrates, and there are protective films for simple protection, light processing, medium processing, and heavy processing. The user can select an appropriate protective film according to the purpose of use. . Assemble and process packaging Attachment content Covering the protective film After bending, cutting, drilling, and roll forming, the protective film is coated on the profiled material and sheet material to be processed and welded. Sparks, cement, mortar, etc. are dropped and adhered to the workpiece. Application area 1. Signage use
Residential wall panel
1. Glass windows, marble, tiles, etc. during construction of the building
2. Application of protective film in PVC plastic profile
In the process of extrusion, door and window assembly welding, transportation and storage, and construction of building materials, plastic sections are often scratched and faded due to many intermediate links, long service life, and exposure to the open air. Especially in the process of construction and installation, welding sparks and cement are easily left on the surface of plastic doors and windows and are extremely difficult to remove. The traditional method is hard scraping. As a result, the surface of the plastic doors and windows is damaged, and the beautiful appearance is damaged, causing poor users. impression. On the other hand, due to the long construction period, plastic doors and windows are exposed to outdoor environments for a long time, fading and darkening, giving the user a sense of oldness. After using the protective film, it solves the difficult problems mentioned above. The protective film technology of PVC plastic profiles is shown in the following table.
1 Substrate black and white bicolor (printing) coextruded PE film
2 thickness 0.08m
3 180° peel force 2.5 to 3.0N/2 5nm
4 Tensile strength 30N/10mm
5 Elongation ≥500%
6 Degumming is not allowed
CPT has many production links and is easily damaged. Therefore, it is necessary to stick a protective film to ensure an increase in the production yield. In addition, before the packaging, the color tube must be affixed with a protective film to ensure that the CRT screen is in transit. Without damage, it is guaranteed that the color TV production factory is a qualified product. The protective film appears to be very small in the color TV. In fact, the function is quite large. The technical performance of the color screen protective film is shown in the following table.
1 Substrate natural PE film
2 thickness 0.05mm
3 180° peel force 0.20～0.30N/25nm
4 Tensile strength 4～5N/10mm
5 Elongation ≥200%
6 Degumming is not allowed
V. Conclusion
Pressure-sensitive protective film technology and products are still in the development stage in China. There are no standards in the country and the industry. Most of the production plants have no company standards, and the market is still very confusing. Most manufacturers cannot produce suitable protective films according to customer requirements. Your own product can be used for the protection of any material. The fact is: Protective film manufacturers should have the ability to provide different performance protective films for different material properties. And I have this ability to produce three major series, more than one hundred specifications of the protective film supply market. 
Considering safety, pollution-free and resource-saving reasons, protective film pressure-sensitive adhesives have developed from traditional solvent-based to water-based and solvent-free types, such as co-extrusion, hot-melt, and radiation-cured developed countries. Industrial production. It is believed that in the near future, domestically produced, high quality and inexpensive new protective film will supply the market and serve thousands of households.
Source: 21st Century Fine Chemicals Network
Pressure-sensitive protective film and its application in modern industry (2)