The history of glue

In the early days, modern adhesives were composed of natural substances and were basically water-soluble. With the rapid development of industry since the 20th century, the output value of natural adhesives (water-based glue) has been unable to meet the total demand, thus promoting the development of synthetic adhesives.
natural rubber
In 1909, the Belgian-American chemist Baekeland invented industrial phenolic resin, which was the development of synthetic resin adhesives. In 1912, Baekeland presented plywood bonded with phenolic glue, which greatly reduced production costs and promoted the durability and bonding strength of plywood.
plywood
Before World War II, solvent-based natural adhesives accounted for most of the adhesive market. Since the emergence of rubber adhesives in 1932, synthetic rubber adhesives have gradually entered the market and are matched with epoxy resin or other resins. Greatly expanded the scale of use. ​
Innovation
After World War II, new polymer materials appeared one after another, and the world entered the era of polymer chemistry. The development of synthetic rubber, synthetic resin, etc. began to become popular around the world. Adhesives have also undergone corresponding technological innovations.
In 1941, people began to use adhesives on the structural parts of aircraft, giving the new name "structural adhesive". The phenolic-polyvinyl acetal resin hybrid structural adhesive created by the British Aer. Company, with the brand name "Redux", was used for the bonding of fighter aircraft in July 1944 and was successful. The subsequent development of adhesives was used in the manufacture of another aircraft named "Comet", but soon the aircraft unfortunately fell, causing an uproar. However, during the investigation of the cause of the accident, it was found that the cause of the damage to the aircraft was that the metal cracked due to fatigue, but on the contrary, the bonded part was still intact. As a result, the reputation of adhesives has grown and their use in structural parts has become more widespread.
Epoxy resin adhesives began to appear in the 1950s. Compared with other adhesives, they have the characteristics of high strength, variety, and strong adaptability, making them the preferred structural adhesive. ​
In 1957, the atmosphere-based acrylic adhesive created by the American Eastman Company ushered in a new era of instant bonding. Under ordinary conditions without solvent at room temperature, strong bonding can be achieved within a few seconds to tens of seconds. In addition, there are also anaerobic adhesives that will cause bonding when air is blocked.
In the following years, the development of adhesives was rapid.
Hot melt adhesives began to appear in the 1960s; second-generation acrylic adhesives appeared in the 1970s; after the 1980s, adhesive research focused on modifying the original varieties, improving their performance, improving their operability, and developing suitable coating equipment And developed non-destructive testing technology, the results include reactive radiation-curing hot melt adhesive and third-generation acrylic adhesive dryer.
In the 21st century, with the improvement of production and living standards, adhesives with ordinary molecular structures are far from being able to meet people's applications in production and life. In the development of modernization of industrial enterprises, the cluster size and degree of automation of equipment are getting higher and higher, and the requirements for continuous production efficiency of equipment are becoming more and more stringent; in the national development route, we must build a modernization system in which man and nature coexist harmoniously. It is also a code that many companies must follow.