Application of PUR hot melt adhesive in shoes
As the footwear industry continues to improve its requirements for performance, comfort and production efficiency, traditional sewing and bonding technologies have gradually failed to meet the needs of modern footwear production. Polyurethane reactive hot melt adhesive (PUR) is rapidly becoming an important material in footwear manufacturing due to its excellent bonding performance, durability, environmental protection and process adaptability, and is widely used in various links such as uppers, soles, and linings.
Advantages of PUR hot melt adhesive in shoe manufacturing:
● Excellent Bonding Performance
PUR hot melt adhesive can form strong bonds with various shoe materials, such as leather, synthetic leather, fabric, rubber, PU, EVA, and more. These materials often have different physical properties, and PUR can adapt to these differences to form a strong adhesive layer, ensuring stable bonding of shoe components like the upper, sole, and lining, preventing detachment or loosening.
● Weather Resistance and Durability
Once cured, PUR hot melt adhesive has excellent temperature, moisture, and aging resistance. It can withstand high and low temperatures as well as humid environments, making it particularly suitable for outdoor shoes, sports shoes, and work shoes that require durability. Whether in hot, wet conditions or cold temperatures, PUR adhesive maintains its bonding performance, ensuring the shoes can be used in various weather conditions.
● Elasticity and Flexibility
The cured adhesive layer of PUR is not only strong but also flexible and elastic. This is crucial for footwear, especially for products like sports shoes and hiking boots that require frequent bending and stretching. The flexibility of PUR ensures the stable bonding of the upper and sole without affecting the comfort and flexibility of the shoe.
● Abrasion and Impact Resistance
Footwear, especially sports shoes and work shoes, needs to endure long periods of wear and friction. Once cured, PUR adhesive has excellent abrasion resistance, allowing it to withstand friction between the sole and the ground, as well as impacts when the upper comes into contact with other objects. This makes PUR hot melt adhesive particularly suitable for high-performance sports shoes, work shoes, and outdoor footwear.
● Environmental Friendliness
PUR hot melt adhesive is solvent-free and has a high solid content, meeting environmental standards. For footwear products like children's shoes, sports shoes, and other items that require high safety standards, using PUR ensures the products are safer and more eco-friendly. This is critical in meeting the growing market demand for sustainability and environmental protection.
● Suitability for Efficient Automated Production
PUR hot melt adhesive offers significant advantages in automated production lines in footwear manufacturing. Its rapid curing properties and high bonding performance enable high-speed production lines, improving production efficiency and reducing production cycles. PUR supports precise adhesive application and shaping, significantly increasing the level of automation in production.
● Seamless Bonding and Aesthetic Enhancement
PUR hot melt adhesive can achieve nearly seamless bonding, leaving no visible adhesive marks or lines, enhancing the aesthetic appeal of the footwear. This is particularly important for footwear with high aesthetic demands, such as premium sports shoes or fashionable shoes, where seamless bonding meets the high aesthetic standards.
Application of PUR hot melt adhesive in shoe manufacturing:
● Bonding of soles and uppers
PUR hot melt adhesive is widely used in bonding soles and uppers. It can effectively bond soles of different materials (such as rubber, EVA, PU, etc.) to uppers (such as leather, synthetic leather, fabric, etc.) to ensure the stability and comfort of shoes. Especially in the production of sports shoes and outdoor shoes, the strong bonding of PUR adhesive ensures the durability and safety of shoes.
● Fixing of shoe linings and insoles
PUR hot melt adhesive can not only bond uppers and soles, but is also widely used to fix shoe linings and insoles. Through precise gluing, PUR adhesive can ensure the firm combination of shoe linings, insoles and soles, and improve the comfort and fit of shoes.
● Enhanced waterproof function
Many outdoor shoes, hiking shoes and sports shoes require good waterproof performance. PUR hot melt adhesive plays a vital role in the composite process of waterproof shoe materials due to its excellent water resistance and moisture resistance, enabling shoes to better resist water intrusion.
● Bonding of decorative parts
In addition to functional bonding, PUR hot melt adhesive is also widely used for bonding decorative parts of footwear, such as shoelace buckles, logos, decorative straps, etc. It can provide strong bonding while maintaining the integrity of the appearance of decorative parts, ensuring that they are not easy to fall off.
The application of PUR hot melt adhesive in the footwear industry brings significant advantages, especially in terms of high bonding strength, weather resistance, wear resistance, environmental protection and production efficiency. It not only improves the durability and aesthetics of shoes, but also promotes the automation and efficiency of footwear manufacturing processes. As the footwear market continues to increase its requirements for high performance, comfort and environmental protection, PUR hot melt adhesive will undoubtedly play an increasingly important role in future footwear production.
