High temperature resistant pressure sensitive adhesive

With the official arrival of 5G era, the mobile phone industry will usher in a new round of changes. With the gradual phasing out of metal back covers, 3D glass and ceramic costs are too high, and traditional plastic cannot meet the requirements of the market for the appearance of mobile phones, as well as the increasingly fierce competition in the middle and low-end market.

These factors will promote the innovation of mobile phone cover plate in the use of materials. At present, composite plate mobile phone cover plate has become a new research hotspot. Through the ultra-high pressure gas molding machine, coupled with the current plastic texture technology, the visual aspect is enough to meet the appearance requirements, while fully meeting the radio frequency requirements of 5G communication signals. Composite materials (such as PC+PMMA) have become a new solution to replace the traditional metal back cover with ceramic and glass.

PC/PMMA composite material is PC and PMMA through the co-extrusion method, because PMMA has good hardness and wear resistance, generally used for external, and PC has good toughness, so as the inner layer. And PC/PMMA composite has the advantages of both PC and PMMA, low cost, efficient product form, with better surface hardness. It can withstand strong impact and has the appearance and texture of glass and metal. It can be formed into 2.5D /3D and meet the demand of wireless charging shield.

Therefore, PC/ PMMA composite material is the preferred material for smart phones in the next few years. PC/PMMA composite plate, not only meet the requirements of rigidity and decoration, but also meet the needs of wireless charging without shielding, PMMA provides higher hardness and weather resistance, PC impact performance and molding performance is good, the two materials after co-extrusion greatly expanded the new application of the battery cover. Therefore, it can be seen that PC/PMMA composite material is the preferred material for smart phones in the next few years. It is mainly to develop pressure sensitive adhesive for the high temperature resistant functional film required in the hot pressing process of composite plate.

Smprotectivefilm has released a new product, FR-921, featuring high solid content and improved coating speed for customers. This product is mainly used for frozen packaging labels.

FR-921 is a high viscosity pressure-sensitive adhesive based on the latest polymerization process and designed with various special monomers. It has good leveling property, high peeling strength, high initial adhesion and high solid content.

Moreover, this product is also an ideal environment-friendly product, with clear film formation, transparency and good weather resistance. It has excellent bonding performance on paper, metal, plastic (such as ABS, PVC, PC, FET, PMMA, etc.) and other materials, especially difficult to stick substrates. Widely used in high-end products in the field of self-adhesive, suitable for all kinds of tape production, to meet the requirements of high-speed coating.