Polyurethane adhesive application fields

1, architecturefield

Polyurethane adhesive not only has Poison, environmental protection, easy to use, and also has advantages that other adhesives cannot match, namely excellent low temperature resistance, solvent resistance, aging resistance, Antibacterial properties play an important role in the application of construction pavement materials. It is widely used in elastic rubber floor mats, hard rubber floor tiles and sports fields with plastic tracks. The new two-component polyurethane adhesive breaks through the contradiction between the shear strength and peel strength of traditional adhesives, and can achieve both at the same timeVerytall Use intensity. It shows excellent performance in bonding steel panels for construction. The bonding is strong and not easy to deform. The curing speed can be adjusted at room temperature. The polyurethane adhesive is easy to use and has a wide range of uses. Polyurethane adhesives are widely used in constructiondoors, windows, and aluminum materials, sandwich panels and building waterproofing.

2, woodField

With the rapid decrease of the world’s forest resources and the implementation of my country’s natural forest resources protection project, The adhesive is required to have better bonding strength, durability and weather resistance than the wood itself. The amount of adhesive used has become a measure of the technological development level of the wood industry. One-component moisture-curing polyurethane adhesive used in the woodworking industry for use at room temperature , generally has higher bonding strength, Good flexibility and water resistance, can be used with a variety of non-wood substrates（Such as textile fibers, metals, plastics, rubber, etc.) font>bonding. The dry and wet strength of one-component polyurethane glue is better than that of phenolic glue.

3, carsField

Automobile application compareA wide range of polyurethane adhesives mainly include: one-component moisture-curing polyurethane sealants for windshield assemblies; structural adhesives for bonding fiberglass and sheet-formed composite materials; double-sided adhesives for interior parts Component polyurethane glue and water-based polyurethane glue, etc. Automotive interior parts are also an area where adhesive usage is increasing. Water-based polyurethane adhesives widely used in automobiles refer to adhesives formed by dissolving or dispersing polyurethane in water. Most waterborne polyurethanes are linear thermoplastic polyurethanes. Since its coating film is not cross-linked and has a low molecular weight, its water resistance, solvent resistance, film strength and other properties are still poor, so it must be modified to improve its performance. The hybrid dispersion of polyester and acrylic acid is compounded with uretdione and isocyanurate to prepare automotive refinishing paint. It does not require high-speed stirring equipment, is easy to mix together, and has good adhesion properties.

4, Shoemaking field

China is a big shoe-making country. After three generations of shoe adhesive development, with the increase in global environmental awareness and the intensification of the oil crisis,�, the fourth generation of environmentally friendly solvent-free water-based shoe adhesives has emerged. In recent years, the preparation process of water-based polyurethane has become increasingly mature. For the bonding of some low-polarity shoe materials such as SBS, the peel strength of polyurethane adhesive does not meet the requirements. By adding tackifying resin, polyurethane adhesives for shoes with high crystallinity, fast crystallization speed, high bonding strength and ideal peel strength can be developed.

5, Book binding

In the past 20 years, hot melt Glue in booksbinding have developed rapidly. The main reason was a huge increase in the production of low-cost paperbacks, coupled with the creation of the wireless binding process. SinceEVAhot melt adhesive has good adhesion and elasticity, most of the hot melt adhesives used for book binding in the domestic market are EVAhot melt adhesive. ButEVAhot melt adhesive is expensive and existsInsufficient elasticity and low adhesionand other shortcomings. Polyurethane hot melt adhesive can make up for the above shortcomings. The adhesive has simple production process, low cost, good elasticity, high toughness and high bonding strength. The adhesive can be melted and reused, with high product utilization rate and broad application prospects.