Qianwei PUR Hot Melt Adhesive Product Introduction
PUR (Polyurethane Reactive) The full Chinese name is moisture-curing reactive polyurethane hot melt adhesive. The main components are isocyanate-terminated polyurethane prepolymers, and the molecular structure contains polar and chemically active urethane groups (-NHCOO-) or isocyanate groups (-NCO) groups. It has excellent adhesion to wood, metal, glass, rubber, plastic, leather, fabric, paper and other materials. Qianwei PUR Hot melt adhesive technology is mature, and even today, it is still one of the best adhesives in many fields. Qianwei PUR The use of hot melt adhesive involves two processes: physical reaction and chemical reaction. The physical reaction is the thermoplastic and cold-setting properties of ordinary hot melt adhesives. The adhesive is applied in a high-temperature fluid state, and after cooling during bonding, it quickly crystallizes and sets; the chemical reaction is that within a few hours to a few days after bonding, Qianwei PUR reactive groups chemically crosslink with active hydrogen in the material to form polyurethane polymers. Qianwei PUR The cured product of hot melt adhesive is polyurethane rubber, and its bonding strength, solvent resistance, paint resistance, heat resistance, and hydrolysis resistance are significantly better than EVA hot melt adhesives and water-based or solvent-based adhesives. PUR Hot melt adhesive is 100% an effective ingredient, without any water or solvent volatilization, meeting the highest environmental protection standards for adhesives, and is the greenest.

Qianwei PUR Advantages of Hot Melt Adhesive Products

Contains no organic solvents, solid content 100 %, environmentally friendly;
Moisture curing, no drying process, fast and energy-saving;
Excellent initial strength, and also has crosslinking curing function, resulting in higher final bonding strength;
Excellent heat resistance, water resistance, chemical resistance, and durability;
Single-component type, easy for industrial automation and mechanized operation, high production efficiency
PUR- Types of Bonding Materials
Mainly used for leather composite and shoe material composite.

Qianwei PUR Hot Melt Adhesive Packaging
30Kg Aluminum foil bag (drum packaging), 200kg Aluminum foil bag (drum packaging).
PUR Hot Melt Adhesive Application Method
Can be used on special reactive PUR ) hot melt adhesive equipment. Such as: roller coating, etc. The coating amount range is approximately 50-180g/m2 , depending on the substrate and application.

PUR Hot Melt Adhesive Transportation and Storage
Avoid collisions, heavy pressure, exposure to the sun, and rain during transportation and loading and unloading to prevent the packaging from deforming, breaking, and external factors from causing it to be unusable. Unopened original packaging is recommended to be stored in -20~40 ℃ dry and clean place, and can be stored for 12 months.
PUR Hot Melt Adhesive Operation and Safety and Environmental Protection Information
Cleaning: Adhesive on the skin should be cleaned with soap. Use a special cleaning agent to clean the equipment, and cleaning must be done before the system is cured. Adhesive cured on application tools should be removed mechanically.
Operation: Good working hygiene conditions must be maintained, avoiding moisture, oil stains, etc. Pay attention to ventilation, and wear appropriate gloves and goggles when using.
Disposal of product waste: Adhesive liquid is generally not considered hazardous waste, and the residual adhesive liquid can be treated as general harmless waste after solidification.