Advantages and Disadvantages of Solvent-free Polyurethane Adhesive and Its Application
One component solvent-free polyurethane adhesive is a room temperature solvent-free one component curing sealant. It is widely used. Whether it is in the waterproof construction of the construction project or in the leakage of the family kitchen and bathroom, it can play a very good waterproof sealing effect.
single componentSolvent-free polyurethane adhesiveIs a room temperature solvent-free one-component curing sealant. It is widely used. Whether it is in the waterproof construction of the construction project or in the leakage of the family kitchen and bathroom, it can play a very good waterproof sealing effect.
single componentSolvent-free polyurethane adhesive advantages:
1. It has strong tensile strength, high stability, low odor, and relatively small environmental pollution. It is a new type of environmentally friendly material.
2, with high thixotropy, even in the vertical surface, or the top of the use, will be very stable, will not flow, affect the use effect.
3, wear-resistant, cold-resistant, non-corrosive to other materials, so it can be used on most materials.
4, the surface can be painted, polished, etc., will not affect the effect.
5, has a strong anti-aging ability, so the service life can be as long as 15 to 20 years. Solvent-free polyurethane adhesive has good elasticity and tensile properties, and wear resistance, cold resistance, oil resistance, etc. Therefore, it is widely used in construction, electronics, transportation and other convenient uses.
single componentSolvent-free polyurethane adhesiveDisadvantages:
1. Good heat resistance, can not be in high temperature environment for a long time, otherwise it will affect the effect, produce cracks, bubbles, etc., long-term exposure to ultraviolet rays, but also affect the service life.
2. When using solvent-free polyurethane glue in some occasions, it needs to be coated and cannot be directly coated.
3. The water resistance of solvent-free polyurethane adhesive is also poor, especially alkali resistance. If it is in an alkaline water environment, it will greatly affect the use effect.
Application of solvent-free polyurethane adhesive:
Solvent-free polyurethane adhesive is mainly used in civil construction, transportation industry, etc. For example, in Japan, about 75 to 80% of solvent-free polyurethane adhesives are used in construction, 15% are used in automobiles and machinery manufacturing, and 5% are used in civil engineering.
Specific applications in buildings include: filling and sealing of joints between concrete bricks and other building materials, concrete sealing caulking between wooden frames around doors and windows and walls, lighting structures on buildings, such as sealing and pasting of curtain walls, waterproof sealing of balconies, swimming pools, sanitary ware and other facilities, joint sealing of air conditioning and other systems, heat insulation double-glazing, window frame sealing, etc.
The applications of solvent-free polyurethane glue in automobiles include: assembly and sealing of windows (mainly windshield glass), assembly of body and other parts.
In civil engineering, solvent-free polyurethane adhesive is used for sealing flexible joints of high-grade roads, bridges, airstrips, etc. and sewer pipes, underground gas pipes, circuit board pipes and other pipes of concrete, clay, PVC and other materials. Seam sealing of underground tunnels such as subway tunnels.
Solvent-free polyurethane adhesive can also be used for flexible joints of cables (such as underground cables) and sealing of electronic components to prevent dust and shock. It is used for heat insulation systems such as refrigerated trucks, cold storage insulation layer, low-temperature container bonding and sealing.
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