Hot Melt Glue
What Is Hot Melt Glue?
Hot melt glue, also called hot melt adhesive, is a thermoplastic adhesive that is solid when it is not hot and becomes liquid when it becomes hot. It is applied to create a strong, durable bond in seconds without water, solvents or chemical curing. The fast setting process makes hot melt glue one of the fastest gluing solutions for today’s manufacturing.
Industrial hot melt adhesive provides faster production speed, shorter processing time, reduced VOC emissions and good compatibility with automatic production lines, compared to traditional water-based and solvent-based adhesives. Its fast bonding after cooling results in the improved production efficiency and product consistency during high-speed production.
There are various formulations of the hot melt adhesives that can be used for different bonding applications, substrates, operating temperatures and production environments; therefore it is essential to choose the correct formulation to suit each application.
Types
EVA Hot Melt Glue
EVA (Ethylene-Vinyl Acetate) hot melt glue is the most popular and economical hot melt adhesive. It is fast setting, has good bonding ability, and is easy to process, suitable for mass production. EVA adhesives achieve high levels of adhesion to paper/cardboard, wood and a wide range of porous materials, with stable performance and fast production rates, at competitive costs.
PUR Hot Melt Glue
PUR (Polyurethane Reactive) hot melt glue is a combination of a hot melt adhesive (HMA) and a secondary chemical curing process which produces an extremely strong, durable bond. PUR has excellent heat resistance, moisture resistance, chemical resistance and durability when compared with conventional hot melt adhesives. It is the choice of material for special applications where durability and resistance to the environment are paramount.
PSA Hot Melt Glue
PSA (Pressure-Sensitive Adhesive) hot melt glue will keep tacking after it is applied and will stick with minimal pressure when applied, without the need to heat for assembly. It offers good peel adhesion, tack and flexibility and can be applied on the high speed production line. PSA hot melt adhesives are commonly used in pressure-sensitive labels, adhesive tapes, protective films, and other applications requiring instant adhesion and performance.
Applications
With its rapid bonding speed, high bonding reliability, and ability to be automated for production lines, hot melt glue is being widely used in a variety of industries. By selecting the appropriate glue, manufacturers can optimize their production processes, enhance product quality, and ensure long-term reliability.
Packaging
In today’s fast-paced packaging industry, where time and precision are paramount, hot melt glue is a crucial part of the process. Used for carton sealing, case sealing, carton tray forming, carton folding and corrugated box assembly on high speed production lines. Because of its quick setting time, excellent adhesive properties and low cost, EVA glue is the most widely used general-purpose packaging glue. PUR glue can be better in bonding ability and environmental resistance in case of extreme temperature, humidity and long distance transportation.
Bookbinding
Hot melt glue is employed to join book blocks to covers in the bookbinding industry to ensure long lasting durability and good page retention. With excellent processing efficiency and reliable performance, EVA hot melt glue is widely used in magazines, catalogs, notebooks and general commercial printing. PUR hot melt glue offers excellent heat, cold and aging resistance and the most outstanding flexibility and page pull strength for premium books, photo albums, coated paper and digital printing applications, which help to preserve the binding quality of books over time.
Edge Banding
Edge banding glue is a necessary glue in the furniture production industry. It firmly adheres PVC, ABS, acrylic, melamine, veneer and other edge banding materials to wood based panels, providing a neat and long-lasting edge. EVA glue can be used in the production of ordinary indoor furniture, and PUR glue can be used in high-end furniture production, and has excellent heat resistance, moisture resistance and long-term bonding performance.
Woodworking
Hot melt glue is used in furniture manufacturing for furniture assembly, lamination of panels, profile wrapping, component fixing and other production processes for woodworking manufacturers. It is quick-setting, minimizing wait time and improving manufacturing efficiency, ideal for automated production lines. Depending on the materials and performance requirements, manufacturers can select EVA or PUR hot melt glue to get the optimal combination of processing efficiency and bond strength.
How to Choose Hot Melt Glue?
The selection of hot melt glue is determined by material, production process and performance. When choosing an adhesive, you should take into account the following:
Bonding materials
The adhesiveness of the substrate varies. EVA glue is suitable for bonding paper, cardboard, wood, and many porous materials, and PUR glue is suitable for very demanding bonding applications such as coated surfaces, engineered wood products, or materials that demand greater bonding performance.
Durability
For applications where heat, moisture, frequent handling and long-term mechanical stresses are involved, PUR hot melt glue provides greater heat resistance, moisture resistance, and long-lasting bond strength than other types of hot melt glue. EVA hot melt glue is cost-effective and works well for general manufacturing and packaging processes.
Production line speed
Production efficiency will be directly influenced by open time, setting speed and viscosity. Choosing a hot melt glue that is compatible with your equipment’s speed will help to ensure smooth operation, consistent application of the glue and consistent bonding quality.
Device Compatibility
Hot melt glue should be used with any application system, such as a roller, slot nozzle, spray or automatic dispensing system. The right formulation minimizes downtime, enhances adhesion and prolongs equipment life.
Why Choose Us?
Adhesive (Shanghai) Co., Ltd has been engaged in the R&D and manufacturing of hot melt adhesive for more than 20 years, and can offer customers reliable EVA and PUR hot melt adhesive solutions for packaging, printing, furniture, woodworking and industrial applications.
Our glue is selected by the manufacturers and distributors due to the following reasons:
- Stable quality performance
- Certified quality and compliance
- Customized adhesive solutions
- Professional technical support
FAQ
Contact Us
Looking for a reliable hot melt glue supplier to meet your material, production speed and quality needs? Our technical team is ready to help you whether you require a standard EVA or PUR solution, or a fully customized formula.