Frequently asked questions

What are hotmelt adhesives?

Hotmelt adhesives, also known as hot glue, are thermoplastic adhesives that are melted in a hotmelt adhesive dispensing unit and applied in a molten state. They solidify upon cooling, forming a strong bond.

What are the applications of hotmelt adhesives?

Hotmelt adhesives are used in various applications including: packaging, bookbinding, cabinet assembly, mattress assembly, and labeling bottles and cans. They provide quick-drying and strong bonding characteristics.

How do hotmelt adhesives work?

Hotmelt adhesives work by being heated to a liquid state, applied to the substrate, and then allowed to cool and solidify, forming a durable bond.

Are hotmelt adhesives safe for food and beverage packaging?

Yes, specific hotmelt adhesives are formulated to be non-toxic and compliant with food safety regulations, making them safe for food and beverage packaging.

What are the benefits of using hotmelt adhesives in packaging?

Hotmelt adhesives provide a strong, durable bond that withstands shipping and handling, making them ideal for sealing boxes, cartons, and other packaging materials.

Can hotmelt adhesives be used for bookbinding?

Yes, hotmelt adhesives are commonly used in the publishing industry for bookbinding due to their quick set time and excellent binding strength.

What types of substrates are compatible with hotmelt adhesives?

Hotmelt adhesives can bond with various substrates including wood, glass, metal, plastics, paper, and corrugated materials.

How do I choose the right hotmelt adhesive for my application?

The choice of hotmelt adhesive depends on the specific materials being bonded and the requirements of the application. Consulting with an expert can help ensure the best results.

What is end-of-line packaging?

End-of-line packaging refers to the final stage in the packaging process where products are sealed and prepared for shipment. Hotmelt adhesives are often used in this stage for their strong bonding properties.

Are there different types of hotmelt adhesives?

Yes, there are various types of hotmelt adhesives, each formulated for specific applications and substrates.

What are the different types of hotmelt adhesives?

Hotmelt adhesives can me made using EVA (Ethylene-vinyl acetate), rubber, and polyolefins like metallocene.

How do I apply hotmelt adhesives?

Hotmelt adhesives are applied using a hotmelt adhesive unit that heats the adhesive to a liquid state before application.

What are the advantages of using hotmelt adhesives over other types of adhesives?

Hotmelt adhesives offer quick set times, strong bonds, and versatility across different substrates, making them a preferred choice in many industries.

Can hotmelt adhesives be used in cold temperatures?

Yes, certain hotmelt adhesives are formulated to maintain their bonding strength even in cold and frozen temperatures, making them suitable for various environmental conditions.

What is the shelf life of hotmelt adhesives?

The shelf life of hotmelt adhesives varies depending on the formulation, but they generally have a long shelf life when stored properly.

How do I store hotmelt adhesives?

Hotmelt adhesives should be stored in a cool, dry place away from direct sunlight to maintain their effectiveness.

Are hotmelt adhesives environmentally friendly?

Many hotmelt adhesives are formulated to be environmentally friendly, with low VOC emissions and safe disposal options.

What are the common issues with hotmelt adhesives and how can they be resolved?

Common issues include poor adhesion, stringing, and charring. These can often be resolved by adjusting the application temperature, ensuring proper substrate preparation, and using the correct adhesive formulation.

What is a pop-open?

A “pop-open” is when a box literally pops open after being sealed with hotmelt adhesive improperly.

How do I prevent pop-opens?

Make sure to select the proper hotmelt adhesive with the correct open time and set time. Make sure the compression is adequate, that both sides of the substrate touch each other. Also make sure that there is not too much hotmelt on the substrates which can delay set time.

What is char?

Char is the degradation of the hotmelt adhesive to the point of carbonization or being burnt, it appears as black specks at the bottom of the tank of the hotmelt dispensing equipment. It can lodge itself in filters and nozzles, stopping the equipment and causing unplanned maintenance.

How do I prevent char?

Make sure to use a hotmelt adhesive with a high thermal stability, that it will not degrade over time. Make sure to heat the hotmelt at the correct temperature as stated on the technical data sheet.

What is stringing?

Stringing refers to when the hotmelt dispensing equipment leaves very thin, spiderweb like, strings on packaging lines and equipment.

How do I prevent stringing?

Make sure the proper hotmelt adhesive is selected for the application. Ensure that the adhesive dispensing equipment is properly calibrated, especially the air pressure.

How do hotmelt adhesives compare to solvent-based adhesives?

Hotmelt adhesives offer faster set times, are safer to use due to the absence of solvents, and provide strong bonds, making them a preferred choice in many applications.

Where can I purchase DURAPRO hotmelt adhesives?

Contact us for more information on where to buy.

 

Construction Adhesives

Flooring Adhesives

Membrane Adhesives

Wood Glues

 

Case Sealing

Packaging and Converting

Automotive and Transportation

Graphic Arts

Mattress and Foam

Carpentry and Woodworking

Panel & Wall Bonding Solutions