What are the specific applications of PUR hot melt adhesives?

Release time:

2023-12-07

Previously, we introduced some characteristics of reactive polyurethane hot melt adhesives, namely PUR hot melt adhesives, and made a comparison with conventional hot melt adhesive film types and TPU hot melt adhesives. You should now have a basic understanding of PUR hot melt adhesives. So, as a hot melt adhesive with excellent performance, how widely is PUR hot melt adhesive used, and what are its applications? Although PUR hot melt adhesives have excellent properties, their promotion has been somewhat limited due to the strict moisture control required during manufacturing, storage, transportation, and application. In recent years, breakthroughs in technology and equipment have gradually solved these problems, leading to a gradual increase in applications.

What are the specific applications of PUR hot melt adhesives?

We have previously introduced some characteristics of reactive polyurethane hot melt adhesives, or PUR hot melt adhesives, and compared them with conventional hot melt film products and TPU hot melt adhesives. This should have given you a basic understanding of PUR hot melt adhesives.

So, as a high-performance hot melt adhesive, how widely used is PUR hot melt adhesive, and what are its applications?

Although PUR hot melt adhesives have excellent properties, their use requires strict control over moisture during manufacturing, storage, transportation, and application, which has limited their widespread adoption. Recent breakthroughs in technology and equipment have gradually addressed these issues, leading to increased use.

While PUR hot melt adhesives are more difficult to use, typically requiring specialized equipment and high equipment standards—a significant difference from our hot melt film products—they are widely used in applications demanding higher mechanical performance and weather resistance.

PUR hot melt adhesives can bond porous materials such as foam plastics, ceramics, wood, and textiles, as well as smooth-surfaced materials such as steel, aluminum, stainless steel, metal foil, glass, plastics, leather, and rubber. They also possess considerable cohesive strength and allow for adjustment of raw material ratios to produce a range of adhesives from flexible to rigid.

PUR hot melt adhesives are known to be widely used in packaging, wood processing, automotive, textile, electromechanical, and aerospace industries—key sectors of the national economy:

In the food packaging industry, they can withstand high and low-temperature sterilization processes required by food safety regulations.

In the wood processing and furniture industry, the adhesive layer exhibits good water and aging resistance, and does not pollute or corrode the wood.

In the automotive industry, for structural components and parts, such as windshield sealing and lamp assembly.

In the textile and footwear industries, for bonding fabric seams and shoe soles, offering water resistance and softness.

In the adhesive binding of books, the flexibility of the adhesive layer ensures smooth page turning and prevents creasing or sudden closure at the binding, offering superior performance compared to EVA binding.

In the electronics and electrical appliance industry, the adhesive layer cures quickly, requires no mixing, and has low shrinkage, making it particularly suitable for bonding precision components.