What are the different types of urethan adhesive?
urethane adhesives can be purchased as a one -component product that is in advance mixed or two -piece adhesive that needs to be mixed before use. The structural adhesive industry calls these unreactive adhesives or reactive adhesives. The ingredients can also be mixed with both types of urethane adhesives to reinforce.
In the unreactive class of adhesives, there may be urethane water -based urethane adhesives or based on solvents. The third type is called a hot melt, which is related to the urethan solvent glue. The difference is that the adhesion properties react as they cool. This adhesive is suitable for laminating two surfaces when a light layer of glue is needed. The solvent and water -based products are applied to both sides of the material that the user wants to connect.
Reactive urethane glue usually contains a polymer base and a curing agent. When both substances are mixed together, a chemical reaction takes place that gives the adhesive its strength. One -component adhesiveand use moisture air as a cleaning agent. The reactive hot heat pulling product contains a low melting point and converts into a solid substance as cools, and also responds to moisture in the atmosphere.
urethan adhesives are considered strong and flexible. They can spread and reduce and are generally good in joints with joints such as hardwood floors. Depending on their intended use, urethane adhesives can be purchased in thick or thin samples and can be applied with a sealant knife, wall, seal or brush. Some adhesives have set up quickly, while others have a longer working time before they are set.
These adhesives are effective when climbing two items made of different materials such as concrete and wood. The windshield in many vehicles is kept in place with urethan glue. They are also commonly used in shoes, construction industries, on projects of processingEva and on ceramics. Some types of urethhane adhesive are able to penetrate porous surfaces such as fabrics.
Some people prefer urethan adhesives because they resist abrasion and chemicals. They are also good for external projects because they are resistant to salt water and temperature fluctuations. Most of these adhesives can withstand temperatures up to 250 ° F (121 ° C).
For health reasons, the right ventilation is recommended for a long time. It is necessary to ensure that the product is out of the eyes and skin. Manufacturers also warn the use of these adhesives near heat, flames or sparks that could cause ignition.