What are the bonding functions of adhesives?
1 instant bonding. Instant adhesive does not require heating or pressurization, and has the characteristics of fast curing and high bonding strength. A 6.45 square centimeter bond surface is subjected to a pulling force sufficient to lift a car. Such adhesives have greatly promoted the continuous production line.
2 bonding of structural parts. Structural component bonding refers to the bonding of loads and long-stressed objects that can withstand longer periods of time, such as the bonding of structural members such as buildings, vehicles, ships, aircraft, and spacecraft. Increase the speed; at the same time make the surface of the bonding part smooth and flat, which is conducive to navigation; also has the performance of sealing and anti-corrosion.
3 liquid seal plugging. Some adhesives are fluid liquids at normal temperature. They are applied to various joints or parts that need to be sealed to form an elastic layer of glue, which can replace the usual gaskets and seal.
4 underwater bonding. In the construction of dams or bridges, the shipbuilding industry and the defense industry, it can connect prefabricated parts on land with components in water and underwater, which greatly simplifies the construction process and speeds up the construction progress.
5 oil surface bonding. The oil surface glue does not need to be degreased on the surface first, which simplifies the process and has good bonding strength.
6 hot melt bonding. A hot melt adhesive is a solid that is glued after it is heated and melted into a fluid. The bond is cooled and returned to a solid to form a strong bond. The hot melt adhesive is formulated from a thermoplastic polymer with a tackifier or the like.
7 high temperature bonding and ultra low temperature bonding. Typical adhesives are resistant to temperatures below 100 °C. The inorganic adhesive can withstand about 600 ° C, of which ceramic adhesive is the best, can withstand high temperatures of 1300 ° C. Ultra-low temperature adhesives maintain high strength and toughness at -196 ° C or even lower -269 ° C.
8 pressure sensitive bonding. This product is used for the labeling of merchandise labels, the sealing of cartons, the bundling of wire harnesses, and the protection of the surface of high-gloss metal plates.
9 medical bonding. Medical adhesives have become an indispensable new material for medical treatment. For example, adhesion to the kidney, blood vessel engagement, wound, esophageal or biliary anastomosis, dental bonding and repair, bone connection, etc. can play a very good role.
In addition, there is conductive bonding for electronic device leads, and conductive paste with silver powder as a conductor. Highly transparent optical glass glue for optical glass bonding and light-sensitive photosensitive curing gel and electron beam curing adhesive.