Polyurethane adhesive has many valuable properties. They are very resistant to high temperatures and maintain their stability up to a maximum temperature of 210 degrees Fahrenheit (100 degrees Celsius). They are very flexible when dry and are resistant to dissolution in strong acidic or alkaline chemicals.
Polyurethane adhesive or glue is a type of adhesive that is used in various commercial industries as well as in entertainment and handicrafts. The formulation of some polyurethane adhesives is such that they can be used as sealants or Putty tools are used. For example, its jelly form is often used in the construction or repair of boats or light aircraft. Other types of polyurethane adhesives are used in carpentry, metalworking and masonry. Construction types of polyurethane adhesives can be used on composite floors, flooring and concrete.
There are many advantages to using polyurethane adhesive over other adhesives. For example, this adhesive is suitable for indoor and outdoor use and is very durable. In fact, some brands of polyurethane adhesives guarantee the connection between materials and components together at all times. In addition, unlike many adhesives of this type, polyurethane adhesive is used directly after production and does not need to be mixed with other materials. Most types of polyurethane adhesives can be painted.
The strong adhesion of this adhesive is due to the fact that it acts as a foam when exposed to moisture. Until completely dry and firm. This indicates that a small amount of moisture is needed on a surface to bond. Unless the object used contains a small percentage of water vapor (wood, stone, etc.).
As long as the glue is foamy, there is the idea that it can be wiped off or rubbed on the surface. But in fact the opposite is true. In fact, excess adhesives are easier to remove by scratching and sanding after drying. In addition, a small amount of this type of adhesive is required for use on one surface.
Due to the advantage of being resistant to moisture compared to other adhesives, it is mostly used in connection with wood. The adhesive has been on the market in the United States since 1990, but has been used in Europe for a long time.
The bookbinding industry has largely benefited from the advent of polyurethane adhesive. They cause papers that previously could not be stacked together due to leaf orientation or special skinning methods to come together. The cost-effectiveness of this adhesive is also significant. Because compared to the old techniques, a thin layer of adhesive is needed to use. Theoretically, only a thin layer with a thickness of 0.0004 inches is effective, but it is impossible to use adhesive with a thickness of less than 0.002 inches (0.05 mm).
They are also very flexible and are very useful in places with frequent vibrations and shocks, for example in construction work. Bonding of scrap tires milled with polyurethane adhesives, children’s playground flooring or flooring installed on pedestrian bridges is produced and marketed.
Polyurethane adhesive is available in several common forms. First, it is used in home form and light industrial glue for gluing wood or ceramic materials. It is also used in the form of polyurethane gel in cartridges such as silicone or for sealing in buildings and repairs of houses, furniture and boats and stone buildings. These adhesives are able to connect two objects, one of which is porous. Some heavy-duty polyurethane adhesives are used in cartridges and become 25 percent stronger if they have a longer drying time. There is a component in the market that some of these applications create high added value.