The main component of polyester thermal fuse is polyester fiber, which is made by chemical condensation of organic dibasic acid and dibasic alcohol.

The main component of nylon thermal fuse wire is polyamide fiber, which is made of diamine and diacid condensation or lactam polymerization.

Taking nylon 6 as an example, it is made from caprolactam ring-opening polymerization, the molecular chain is relatively soft, and the presence of hydrogen bonds makes nylon have some special properties.

The difference between polyester thermal fuse and nylon thermal fuse is analyzed from chemical properties

Chemical resistance

nylon thermal fuse: Good tolerance to general chemicals such as acid and alkali. At room temperature, it can resist the erosion of many chemical agents, but in the high temperature, high concentration of strong acid and alkali environment, hydrolysis and other reactions may occur.

Nylon thermal fuse: good alkaline resistance, but relatively weak acid resistance. In acidic environment, the amide bond is easy to be attacked by protons and hydrolysis occurs, which affects the properties of the fiber. However, under alkaline conditions, nylon can maintain good stability.

hygroscopicity

Polyester thermal fuse: poor moisture absorption, under standard environment, its moisture regain is low, usually about 0.4%. This allows it to maintain good dryness in wet environments, but also causes it to be limited in some applications that require good hygroscopic properties, such as some close-fitting clothing.

Nylon hot melt wire: has a certain moisture absorption, moisture recovery rate is higher than polyester.

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