1.The adhesive has strong broad-spectrum properties and belongs to a universal type of structural adhesive.
The
Polyurethane Adhesive molecules contain highly polar amine carbamate bonds, which can form strong chemical bonds with various materials such as metals, plastics, wood, fabrics, ceramics, and stone. Especially for difficult-to-adhere materials like polypropylene and polyethylene, which have low surface energy, they can also be stably bonded after surface treatment. It has both strength and toughness, and can be used for structural bonding as well as meeting the requirements of flexible composite materials. It is widely applied in the fields of automotive, packaging, and composite materials in the building industry.
2. The curing mechanism is flexible and can be applied to various construction scenarios.
It is divided into two major categories: single-component and dual-component. The single-component polyurethane adhesive relies on the moisture in the air to cure, which is convenient for construction and suitable for on-site assembly and sealing bonding. The dual-component is mixed and reacted with the curing agent in a certain proportion to cure, with controllable speed and higher strength, suitable for industrialized production lines. Some products can also have forms such as hot melt, solvent-based, and water-based. Water-based polyurethane adhesive is more environmentally friendly and conforms to the trend of low VOC and green production.
3. Excellent comprehensive performance, suitable for complex working conditions.
Polyurethane adhesives possess excellent fatigue resistance, impact resistance, low-temperature resistance and hydrolysis resistance. They do not crack at low temperatures and do not soften at high temperatures. The bonding layer has both elasticity and strength, effectively buffering vibrations and stresses. Compared to epoxy adhesives, they are more flexible; compared to acrylic adhesives, they are more resistant to low temperatures and aging. In industries with high reliability requirements such as rail transportation, new energy batteries, cold chain equipment, and soft packaging composites, they are the preferred bonding solutions.
