Introduction of characteristics of PU adhesive
PU adhesive is a kind of material with excellent performance, and its development process is affected by many factors. Since entering China in the 1950 s, PU adhesives have been widely used and continuously developed, especially in recent years, with the emergence of various application requirements such as environmental protection, high strength, and high adhesion, PU adhesives have been used in various fields. There are better applications.
PU adhesiveIt is a kind of material with excellent performance, and its development process is affected by many factors. Since entering China in the 1950 s, PU adhesives have been widely used and continuously developed, especially in recent years, with the emergence of various application requirements such as environmental protection, high strength, and high adhesion, PU adhesives have been used in various fields. There are better applications.
1. Development and application of (I) raw materials
Its raw materials mainly include polyether polyols, isocyanates and solvents. With the development of science and technology, new raw materials have been introduced, such as water-based PU, green PU, etc. The emergence of these raw materials has made the application of PU adhesives more optimized in terms of performance and cost.
2. Progress and improvement of (II) technology
Technological progress is an important driving force to support its development. Since entering our country in the 1950 s, the adhesive process and technology have undergone a fundamental change. For example, hot-melt PU adhesives have replaced traditional coated PU adhesives, and the application of thermosetting PU adhesives has become the mainstream process for flat sandwich panels.
3. Expansion and expansion of (III) applications
The expansion of PU adhesive applications is also an important factor in its development. In the construction, transportation, electronics, shoes, leather and other fields, PU adhesive has a wider and deeper application. Especially in high-speed trains, building insulation and other fields of application, promote the development of PU adhesive technology and application.
4. Adjustment and optimization of (IV) policies and regulations
The adjustment of policies and regulations has also promoted the development of PU adhesive industry to a certain extent. For example, the implementation of policies and regulations such as the "Water-based PU Adhesive Industry Emission Standard" issued by the state in 2016 has strongly promoted the development of the adhesive industry towards an environmentally friendly direction.
5. Changes in (V) market demand and expansion of demand scale
The continuous change of market demand and the expansion of demand scale have also promoted the development of PU adhesives. Not only the domestic market demand for PU adhesive is increasing, but also the foreign market has higher requirements for the quality and processing technology of PU adhesive. This is also one of the important reasons for the continuous innovation of PU adhesives and the creation of new fields.
In short, its development is driven by many factors. In the future, with the requirements of various industries for more high quality and various functions of PU adhesives, PU adhesives will have more extensive and in-depth applications and usher in better development prospects.
It is a commonly used adhesive and can be used for bonding various materials. However, some problems need to be paid attention to when using.
After purchase, check whether the packaging is intact and expired before use. Avoid using adhesives that have expired or have broken packaging.
It needs to pay attention to the use of the environment, should be in sufficient ventilation, fireworks prohibited environment. Avoid using near flammable and explosive materials to prevent accidents.
When in use, personal protective equipment such as gloves, masks, goggles, etc. should be worn to prevent the adhesive from splashing on the skin or respiratory tract. At the same time, keep the adhesive out of the reach of children.
PU adhesive is not resistant to water, so avoid contact with moisture when used. When there is moisture on the bonding surface, it should be wiped dry before bonding.
When using PU adhesive, the catalyst should be added according to the specified proportion, too much or too little will affect the bonding effect.
When using PU adhesive, it should be carried out in accordance with the specified operation process and should not be changed at will. For example, a layer of primer should be applied before bonding.
In short, PU adhesive is a good adhesive, but special attention should be paid to safety issues when using it to ensure the smooth progress of the bonding operation.
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