PUR hot melt adhesive can stick what products?
With the development of intelligent electronic products, many electronic products are developing in the direction of integration and wireless. During the assembly process, some need to be glued. For example, shell bonding requires PUR hot melt adhesive. The application of PUR hot melt adhesive in electronic products is also increasing, and PUR hot melt adhesive has gradually adapted to many products. So electronic PUR hot melt adhesive can stick what products?
With the development of intelligent electronic products, many electronic products are developing in the direction of integration and wireless. During the assembly process, some need to be glued. For example, shell bonding requires PUR hot melt adhesive. The application of PUR hot melt adhesive in electronic products is also increasing, and PUR hot melt adhesive has gradually adapted to many products. Then the electronPUR hot melt adhesiveglue can stick what products?
PUR hot melt adhesive has become a good choice for bonding, sealing, laminating, connecting, insulation, electronic protection and assembly of electronic products. The specific applications of PUR hot melt adhesive include: mobile phone (mobile phone case, mobile phone holder, mobile phone TP screen, mobile phone back case, mobile phone frame, etc.) Computer (computer frame, computer keyboard, computer display screen), smart device frame bonding, TWS headset, smart watch, navigator, smart fingerprint lock, punch card machine, connector, automotive electronics, learning machine, wearable electronic devices, etc.
What is the curing mechanism of PUR hot melt adhesive glue PUR hot melt adhesive glue?
Moisture curing polyurethane hot melt adhesive is based on isocyanate-NCO-based prepolymer, adding thermoplastic resin, tackifying resin and other fillers and additives that do not react with isocyanate groups. Moisture curing PUR hot melt adhesive sizing after curing is in the cooling process, PUR hot melt adhesive absorbs moisture in the air, trace moisture in the adhesive substrate and other compounds containing active hydrogen, and reacts with NCO groups to generate polymers with cross-linked network structure and high cohesion, which further enhances adhesion and realizes strong bonding of products.
Blocked polyurethane hot melt adhesive is a blocked prepolymer formed by protecting the end-NCO group in polyurethane prepolymer with a blocking agent (oxime, alcohol sodium bisulfite, etc.).) under certain conditions. This PUR hot melt adhesive is not reactive at room temperature. When heated to a certain temperature, the blocking agent decomposes, releases the active-NCO group, and then reacts with the moisture in the air and other active hydrogen-containing compounds to form a high-viscosity polymer, thereby achieving a strong bond of the product.
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