What does PA mean in PA broken bridge aluminum alloy?

PA is nylon, a component of heat insulation strip.

Broken bridge aluminum alloy window is improved on the basis of old aluminum alloy window to improve the thermal insulation performance of doors and windows. Aluminum alloy profile is divided into two parts by reinforced nylon gasket, which blocks the heat conduction of aluminum.

PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, and has low friction coefficient, certain flame retardancy and processability. It is suitable for reinforcing and modifying filled glass fiber and other fillers, improving performance and expanding application range.

Extended data

Nylon was invented by the famous American chemist carothers and his research team. 1October 27th,1938,65438 officially announced the birth of the world's first synthetic fiber, and named polyamide 66 nylon. Nylon later became "the general name of all polyamides synthesized from coal, air, water or other substances, which has wear resistance and flexibility, and its chemical structure is similar to that of protein".

193910124 October, the public offering in nylon stockings caused a sensation, and it was regarded as a rare thing and rushed to snap up. People once praised this kind of fiber as "as thin as spider silk, as strong as steel wire and as beautiful as spun silk". By May 1940, nylon fiber fabrics were sold all over the United States.

From the outbreak of World War II until 1945, the nylon industry turned to military products such as parachutes, aircraft tire fabrics and military uniforms. Due to the characteristics and wide application of nylon, various products of nylon, from stockings and clothes to carpets, ropes and fishing nets, have appeared in countless ways.

1April, 958, the first batch of domestic caprolactam test samples were finally successfully trial-produced in Jinxi (now Huludao, Liaoning) Chemical Plant. The products were sent to Beijing Fiber Factory for successful spinning, which started the synthetic fiber industry in China.

Because it was born in Jinxi (now Huludao, Liaoning) chemical plant, this synthetic fiber was later named "nylon", which is nylon. Because nylon played an important role in national defense and military affairs in the early days of the founding of poor new China, the significance of the birth of nylon is self-evident.

Nylon fiber is the raw material of many kinds of man-made fibers. The construction industry uses hard nylon, and the hot air balloon made of nylon can be made very big.

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