Polyamide, commonly known as nylon, is one of the five largest engineering plastics with the largest output, the most specifications and the most versatile. Today, let's take a look at the history of nylon development and take a look at the development of different polyamide products for nearly 100 years (with different nylon constructions).
Dr. Stiming (CMASti-ne), director of DuPont's chemical division, foresees more basic research in organic chemistry to ensure the company's future development. Dr. Carrousus, a researcher at Harvard University for two years (WallaceH.Carothers) , 1896-1937) was persuaded to join DuPont.
DuPont established the Institute of Basic Chemistry, and Dr. Carothers, 32, was hired as the head of the Department of Organic Chemistry. He hosted a series of studies using polycondensation methods to obtain high molecular weight materials, and finally found a large polymer that can be cold-extruded into fibers. Dr. Carothers mainly uses a variety of amino acids, dibasic acids and diamines to synthesize polyamides.
February 28, 1935
He made the polymer from adipic acid and hexamethylene diamine. Because both of the main components contained 6 carbon atoms, which was then called polyamide 66 (or nylon 66), he melted the polymer. After being extruded through an injection needle, it is stretched into a fiber under tension. This fiber and polyamide 66 fiber was published in 1937 (USP 2,130948) P1.
PSchack of IGFarben found that e-caprolactam polymerization can be carried out in the presence of water to produce polyamide 6 (or nylon 6). The company developed on the basis of this discovery, under the name "Perlon".
DuPont achieved industrialization. On October 24 of the same year, the following picture shows the sensation of the public sale of nylon silk stockings at the headquarters of the company. By May 1940, nylon fiber fabrics were sold throughout the United States.
BASF developed the industrialization technology of nylon 6, but the formal industrial production was after the Second World War. After the production, it was named Nylon, which was the first synthetic fiber to be industrialized. DuPont's development of nylon applications is primarily fiber.
The nylon industry has transformed into the defense industry, such as manufacturing parachute, aircraft tires, cord fabrics, military uniforms and other military products. Because nylon has many advantages and wide-ranging uses, it developed very rapidly after the Second World War and became one of the three major synthetic fibers, including stockings, clothing, carpets, fishing nets and so on.
Among them, during the Second World War, Japan was stimulated by the invention of DuPont, and established a joint research system of military departments, industries and schools to carry out trial production of nylon 6.
But formal industrial production was also started in 1951 by Toray (now Toray). Focusing on the use of nylon fiber, it has developed rapidly after the war, but it has been developed late as an engineering plastic.
During the Second World War, the United States used nylon as a wire covering material, cable and several molded products, but the development of plastic products based on injection molded products did not begin until 1950.