What Distinguishes PUR Hotmelt From Traditional Hotmelt?

A moisture-curing polyurethane hot melt adhesive (PUR) is one option to think about when choosing an adhesive for your manufacturing, packaging, and labeling requirements. Although polyurethane hot melt has several benefits due to its high bond strength, there are drawbacks as well. We are examining the benefits and drawbacks of polyurethane hot melts in comparison to conventional hot melts.

A Comparison of PUR hot melt adhesive and traditional hot melt adhesive

There are numerous types of industrial adhesives on the market today.  Hot melts are the most widely used type.

traditional hot melt adhesive

Because they are thermoplastic and polymer-based, hot melt adhesives are solid at normal temperature. These are typically applied as a sequence of beads or as a molten film, which solidifies when the components cool and solidify. They have a quick set time as well because they don't use water or solvents. 

Use conventional hot melts when cost is more important than binding strength.  However, heated melts don't create a structural connection. Even though there are several powerful hot melts available, if the bond will be exposed to direct heat or fluctuating temperatures, this type of hot melt is not the best option. Applying a hot melt while the material is still liquid will cause the bond to revert to its initial state and fail. 

PUR hot melt adhesive

PUR hot melt is not the same as conventional hot melt. The method of dispensing it is much the same as applying the glue to the materials after heating it to a liquid condition. When the materials cool, they will adhere to one another. But as it cools, it undergoes a chemical transformation that forges an extraordinarily robust link with the moisture in the air. After 24 to 48 hours, this link keeps getting stronger until it is completely cured. 

PUR hot melt is not the same as conventional hot melt. The method of dispensing it is much the same as applying the glue to the materials after heating it to a liquid condition. When the materials cool, they will adhere to one another. But as it cools, it undergoes a chemical transformation that forges an extraordinarily robust link with the moisture in the air. After 24 to 48 hours, this link keeps getting stronger until it is completely cured. 

When you require a structural bond but don't want to handle the clumsy mixing and dispensing that many adhesives require, use PUR. When replacing screws, nails, staples, and other fasteners, use PUR. PUR is used in a variety of applications that call for robust bonding to leather, textiles, wood, plastics, and many other materials.

Advantages of PUR and traditional hot melt adhesives

PUR Hot Melt：

• More robust than conventional hot melt 

• Not just thermal bonds but also chemical changes

• Dispensing is simple—no mixing required. 

• can take the place of more costly structural adhesives. 

• Numerous choices for viscosity and open time

traditional hot melt：

• Reasonably priced 

• Simple to use 

• Designed for a range of materials and applications 

• Outstanding quality of seal 

• Easy dispensing

Disadvantages of PUR and traditional hot melt adhesives

Both PUR and conventional hot melt have drawbacks, despite their great advantages.

PUR Hot Melt：

PUR is typically more expensive than conventional hot melt.  Another drawback of polyurethane hot melt is that it requires greater storage considerations due to the way it cures with water. The product might be ruined by improper storage and moisture exposure. Because of this, they have a shelf life of around a year, but other hot melts don't.  

traditional hot melt：

The fact that conventional hot melts only create a thermal bond is one of its drawbacks. They are therefore weaker than PURs. You might want to reevaluate your decision if strength is your top concern. The fact that traditional hot melt typically has lower heat resistance than PUR hot melt is another drawback.