Characteristics and development trend of PET Zipper Braided Sleeve

The basic structural unit of Pet Zipper Braided Sleeve is: it is composed of silicon-oxygen chain links, and the side chains are connected with various other organic groups through silicon atoms. Therefore, the structure of PET Zipper Braided Sleeve coating material contains both "organic groups" and "inorganic structures". This special composition and molecular structure makes it integrate the characteristics of organic substances and the functions of inorganic substances.

1. High temperature resistance: Since the molecular structure of PET Zipper Braided Sleeve has structural characteristics similar to that of inorganic polymers, and its bond energy is very high, it has excellent heat resistance. The operating temperature of the rubber type PET zipper sleeve is about 250°C, and the resin type PET zipper sleeve can be used for a long time at 350°C.
2. Low temperature resistance: The rubber-type PET Zipper Braided Sleeve has long keys, large key angles, and is very soft. Its glass transition temperature is generally around -123°C, and it can be used for a long time in the range of -50 to 250°C. Special products can be used in the range of -100 to 300°C. For example, silicone rubber containing 7.5 (molar content) phenyl groups is at - It remains elastic at 112°C.
3. Weather resistance: There is no double bond in the main chain of PET Zipper Braided Sleeve, so it is not easy to be decomposed by ultraviolet light and ozone. Long-term exposure to the outdoors or in an environment with high ozone concentration will not cause cracking and viscous creep, and the physical and electrical properties will basically remain unchanged. The resin type PET Zipper Braided Sleeve will not turn yellow even under strong ultraviolet radiation, and its color can remain unchanged for many years.
4. Hydrophobicity: In the PET Zipper Braided Sleeve, the methyl group is connected to the silicon atom by a bond, thereby increasing the space for free rotation, and the hydrogen atoms on the methyl group arranged outward repel each other with the hydrogen atoms of water, making Water molecules are difficult to get close to hydrophilic oxygen, so they have strong hydrophobicity. Methylhydrogenpolysiloxane or polyethylhydrogensiloxane containing Si-H bonds has reactivity and strong orientation, and can be cross-linked into a hydrophobic film at low temperature through the action of a catalyst.
5. Gas permeability: Because the polysiloxane molecule has a helical structure and a large free space, the silicone rubber coating film has good gas and vapor permeability. For example, at room temperature, it is resistant to nitrogen, oxygen, and carbon dioxide in the air. The permeability of other gases is 30-5O times higher than that of natural rubber, and it is selective. Therefore, it has been widely used in gas and water vapor separation membranes, artificial heart-lung machines, oxygen-enriched devices, etc.
6. Low surface tension and low surface energy: The main chain of PET Zipper Braided Sleeve is very supple, and its intermolecular force is much weaker than that of hydrocarbons. Therefore, it has lower viscosity and lower surface tension than hydrocarbons of the same molecular weight. Weak, small surface energy, strong film-forming ability. This low surface tension and low surface energy are the main reasons for its wide application: hydrophobicity, defoaming, foam stabilization, anti-sticking, lubrication, glazing and other excellent properties.
7. Electrical insulation performance: PET Zipper Braided Sleeve products have good electrical insulation performance, and their dielectric loss, withstand voltage, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best among insulating materials, and Their electrical properties are only slightly affected by temperature and frequency. Therefore, they are a kind of stable Cable Sleeve, which are widely used in the electronics and electrical industries. In addition to excellent heat resistance, PET Zipper Braided Sleeve also have excellent water repellency, which guarantees the high reliability of electrical equipment in wet conditions.
8. Physiological inertness (non-toxic): PET Zipper Braided Sleeve elastomer is non-toxic and harmless after the correct selection of reliable cross-linking and catalytic systems, and can be used in food and medical industries.