Product Description
Synthetic materials like polyurethane reactive glue, or PUR, are commonly utilized in home repair and large-scale production. Initially developed in the 1930s as a less costly substitute for rubber, polyurethane hot melt has since undergone refinement and grown to become one of the most widely used adhesives in the manufacturing industry. What are the finest ways to use PUR hot melt adhesive in your production, and why is it so appealing?
Why Choose PUR Hot Melt For Your Application?
While hot melt adhesives have been used for many years, PUR technological breakthroughs in the 1950s brought PUR to the forefront of popularity for applications like as bookbinding, woodworking, and packaging. PUR is ideal for bonding challenging substrates because of its great flexibility and wide temperature setting range.
PUR hot melt offers adhesive strengths exceeding 1,000 lbs, making it much more powerful than conventional hot melt. This happens because the PUR reacts with the moisture in the air and polymerizes. After the curing process is completed, the adhesive created by crosslinking polymerization develops a more durable bond compared to other hot melt glues.
In comparison to other hot melt adhesives, PUR has a lower volatile organic compound (VOC) content, which makes it a more environmentally friendly option. PUR adhesives need a full day to cure in most cases, and because moisture in the air causes them to react and become stronger, air exposure is essential while PUR is drying.
Important Features of PUR Hot Melt
1. Strengthens a bond more than a thousand pounds
2. Workable with nonporous, hard-to-bond substrates
3. Flexible and capable of hard setting or becoming rubbery after curing
4. Accepts a broad range of temperatures, making it appropriate for both indoor and outdoor use
5. Performs effectively with challenging coatings, inks, and substrates
6. Compared to other hot melt glues, less adhesive is needed to create high-quality bonding.
7. No mixing is required
8. Quick time to cure
Applications For PUR Hot Melt
Although PUR hot melt is widely used in many industries' manufacturing processes, we are regularly asked how a company may use PUR in their operations. Several sectors employ hot melt adhesives to cut labor costs, increase user-friendliness, and benefit from moisture and temperature tolerances. Although every business is unique, we have included a list of some of the most widely used PUR hot melt applications below.
1.Bookbinding
Perfect binding frequently uses PUR adhesive. While animal or EVA glue is used in traditional perfect binding, PUR is a practical and efficient substitute. Since PUR adhesive is more flexible than EVA or animal glue after curing, bookbinding is more resilient and requires less cracking when using it.
2.Packaging
PUR hot melt is well-liked by industrial packaging producers for use in shipping containers and cosmetics because it offers a stronger bond and a quicker cure time than certain conventional hot melt glues.
Additionally, PUR dries clear, which facilitates the concealment of adhesive lines and the appearance of continuity in attached materials.
3.Woodworking
When assembling wood furniture, PUR can assist reduce the need for extra fasteners and screws.
PUR is a popular adhesive among crafters because to its quick drying time and exceptional strength.
4.Construction
PUR is excellent for use in construction because of its capacity to adhere to non-porous materials. Hard-to-bond materials can be held together without the need for additional fasteners thanks to its great strength. PUR sticks to most metals, glass, plastic, and wood. Because of its strong bond and quick drying time, PUR is an excellent glue for automated assembly.
