PUR Reactive Hot Melt Adhesive

PUR Reactive Hot Melt Adhesive

 

 

PUR Reactive Hot Melt Adhesive is the full name of PUR hot melt adhesive. Its core characteristic is its "reactive" nature-meaning that after application, it cross-links and cures through moisture, forming an irreversible, high-strength bond. This product uses isocyanate-terminated polyurethane prepolymer as its matrix. After being heated and melted (usually at 130-150℃) and applied, it chemically reacts with moisture in the air or in the substrate to form a polyurea structure, achieving a transformation from thermoplastic (meltable upon heating) to thermosetting (non-meltable upon heating).

• Moisture Crosslinking Reaction: Isocyanate groups (-NCO) react with moisture (H₂O) in the air or hydroxyl groups on the surface of the board to form a polyurea crosslinking network. After curing, it no longer melts upon heating.
• Superior Temperature Resistance: After curing, the softening point is 120-150℃, and it can withstand 180℃ for short periods; EVA only softens and delaminates near heat sources at 80-100℃.
• Qualitative Change in Water Resistance: After crosslinking, the molecular structure is hydrophobic, and it does not emulsify or delaminate after long-term immersion (72 hours). EVA absorbs water and turns white, causing its adhesion to drop to zero.
• Adhesive strength continuously increases: Initial peel strength is approximately 40-60 N/25 mm, reaching 80-120 N/25 mm after complete curing; strength increases over time rather than decreases.
• Resistant to chemical corrosion: Resistant to alcohol, detergents, weak acids and alkalis, grease, sweat, etc., suitable for kitchen, laboratory, and medical furniture.
• Excellent toughness: Retains a certain degree of elasticity after curing; the adhesive layer is less prone to cracking when the board expands and contracts due to temperature changes, superior to rigid thermosetting adhesives.

• Scenario 1: High-End Kitchen Cabinets – Around the stove and sink cabinets, requiring heat resistance (hot pots, steam), water resistance (sink leaks), and oil resistance; PUR adhesive is standard.
• Scenario 2: Bathroom/Balcony Cabinets – Long-term high humidity and frequent water contact; EVA adhesive easily delaminates after 3-6 months, while PUR adhesive has a lifespan of 5-10 years.
• Scenario 3: Export Furniture – High temperature and humidity inside shipping containers (up to 50℃/95%RH); EVA adhesive easily softens and delaminates; PUR adhesive has stable performance, reducing customer complaints.
• Adhesive strength continuously increases: Initial peel strength is approximately 40-60 N/25 mm, reaching 80-120 N/25 mm after complete curing; strength increases over time rather than decreases.
• Resistant to chemical corrosion: Resistant to alcohol, detergents, weak acids and alkalis, grease, sweat, etc., suitable for kitchen, laboratory, and medical furniture.
• Excellent toughness: Retains a certain degree of elasticity after curing; the adhesive layer is less prone to cracking when the board expands and contracts due to temperature changes, superior to rigid thermosetting adhesives.

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Made with standard-compliant raw materials, it has no irritating odor and is more environmentally friendly.

Seamless seal

Folds repeatedly without breaking

Mido Edge Banding Strips

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