I. Characteristics of TPU Hot-Melt Adhesive Film:

Processing temperature 110-160 Celsius ， Multiple processing temperature options available, labor-saving, highly flexible. ， Features include excellent flexibility, strong adhesion, water resistance, washability, no glue seepage, and environmental friendliness.

Application areas :  Widely used in waterproof zippers for outdoor jackets, seamless pockets for ski suits, plackets, mesh-to-rubber bonding for sports shoes, and seamless underwear. TPU Fitted, leather-fabric composite, seamless phone case, synthetic board, metal film composite, conductive fabric, reflective material, automotive interior trim, IC Chip packaging PVC Composite and other related industries.

II. TPU Applications of hot melt adhesive :

1. Lamination of various fabrics ( Textile fabrics and nonwoven fabrics made from various materials , Wait a minute.

2. Bonding two or more materials made of different substances. , Such as plastic or leather

3. Used for bonding signs, labels, embroidered labels, soundproofing and thermal insulation materials, etc.

4. Waterproof zipper , Waterproof strip , Wait

5. Thermal Transfer Lamination

6. Laminating in the wood and furniture industry

7. Bookbinding

8. Clothing and Maternal & Child Products ( Such as diapers , Wait )

9. Automotive industry—Interior components , Lights , Wait

10. Healthcare industry

11. Interior decoration industry

As : Low temperature, high transparency , High-dialysis fabric , Racing suit ink grade , The requirements for adhesives in wire-o binding of leather surface treatment books are: : The recycling of used books meets environmental requirements and provides an adhesive strength that can replace wire binding. , You need to withstand the scorching heat of summer as well as the bitter cold of winter. , The pages should have a certain degree of flexibility and fold resistance when flipped through. , And polyurethane hot-melt adhesives can better meet the requirements in this regard. , It is better able to meet the requirements of both the bookbinding production process and future usage.

III. Development Trends in Low-Temperature Hot-Melt Adhesives

To enable low-temperature hot melt adhesives to build on their previously rapid development. , Maintain sustained, healthy development. , Efforts should be made to improve in the following areas.

1. Modifying and upgrading existing varieties through blending. ( Mixing ) Modifying and upgrading existing varieties through methods such as copolymerization and grafting. , To enhance the overall performance and application performance of hot melt adhesives, such as improving their heat resistance and stability. , Reduce melt viscosity, enhance adhesion strength, and improve wash resistance, etc. ; Study the types and dosages of various compounding agents. , And optimize the formulation to meet different application requirements and bonding needs.

(1)     Vigorously develop high-quality hot melt adhesives.

The gap between domestically produced hot melt adhesives and imported hot melt adhesives often lies in the stability of their quality. , To firmly establish

Quality awareness and brand awareness. Strictly control the quality of raw materials, process equipment, and quality inspection procedures. Firmly implement [these measures]. IS09001 Quality certification system ,1400 Environmental certification system . Promote the stabilization and improvement of hot melt adhesive quality.

(2) Vigorously develop specialized products. TPU Hot melt glue

In recent years , In addition to traditional processes such as powder spreading, powder dotting, and paste dotting, domestic adhesive interlining coating methods also include other techniques. , It is also transitioning to new coating processes such as dual-point coating and cold-transfer powder dots with Chinese characteristics. , To adapt to the new coating processing method , Many hot melt adhesive manufacturers have developed specialized hot melt adhesive powders. , Such as Type IV and Type V developed in Tangshan and other regions. PA Hot melt adhesive powder ; Cold-transfer powder-specific hot-melt adhesive powder has been developed in Qidong and other regions. Additionally, , For example, the composite of polyester hollow-conversion filament uppers and lining fabrics used in military boots also employs specialized hot-melt adhesives. Similarly, specialized hot-melt adhesives for automotive filters and reflective materials are currently under development. , This has greatly expanded the application scope of hot melt adhesives.
 

(3) Vigorously develop composite hot-melt adhesives.

The primary methods for developing composite hot-melt adhesives include blending, copolymerization, and grafting. . If a certain amount is added to polyester hot-melt adhesive, P.S. and And E VI A Resin and tackifying resin , Can enhance bonding strength , Reduce the melt viscosity. For example, modify polyamide hot-melt adhesives using polybasic acids and polyols. , There is also an amide bond. (-0-NH-); Combines the common advantages of polyester hot-melt adhesive and polyamide. , It's a new type of hot melt adhesive material. . Features excellent resistance to water washing and dry cleaning. . This is it. PEA Composite hot melt adhesive. A few years ago. , Hot melt adhesives have already been trialed at factories in Jiangsu and other regions. , Has achieved certain results.

2 Accelerate the research and development of new hot-melt adhesive products. , As China’s national economy continues to develop rapidly and healthily, , Hot melt adhesive has been widely favored by consumers. , The applications of hot melt adhesives continue to expand. : At the same time, higher requirements have been placed on hot melt adhesives.

1) Thermoplastic polyurethane elastomer hot melt adhesive

Thermoplastic polyurethane elastomer hot-melt adhesive is based on polyester. ( Polyether ) Polyols serve as the soft segments. , The diisocyanate and chain extender constitute the hard segment. , It is prepared by the prepolymer method. The soft and hard segments, structure, relative molecular weight, chain extender, and isocyanate index significantly influence the mechanical properties, crystallization behavior, adhesion performance, and heat resistance of polyurethane hot-melt adhesives.

2) Reactive Polyurethane Hot-Melt Adhesive

Hot melt adhesives generally use thermoplastic polymers as their base material. , Prone to creep and with certain limitations in heat resistance. ; A reactive hot melt adhesive is one that can continue to react and crosslink after cooling and solidification. , Can significantly enhance its heat resistance and media resistance. ; It combines the advantages of both traditional solvent-based adhesives and thermoplastic hot-melt adhesives. Its application fields will continue to expand. Reactive polyurethane hot-melt adhesives can be categorized into blocked polyurethane hot-melt adhesives and moisture-curing polyurethane hot-melt adhesives.