Standard O Rings performance and advantages and disadvantages
Standard O Rings, in our daily life mainly used in the heat preservation box, water cup, electric rice cooker and other daily supplies of fresh and anti-crushing seal. Great convenience for our lives, so what are the performance and advantages of standard O?
The performance of the Standard O Rings is mainly:
1. Excellent sealing performance, waterproof and no leakage.
2. Good preservation, completely non-toxic and tasteless.
3. Can be heated under high temperature, no deformation, no harmful substance.
4. Good tensile strength, passed special test.
5. Permanent use of yellow color will not fade.
6. Resistance to corona, arc resistance, high temperature resistance, good aging resistance, high temperature resistance and compliance with FDA and SGS standards.
Advantages and disadvantages of Standard O Rings:
Heat resistance: silicone rubber is much better than the ordinary heat resistance, Standard O Rings can be used almost always under 150 ° and no performance change, can be 200 hours of continuous use under 200 °, 350 ° can also be used for a period of time. Widely used for heat proof, thermo-water bottle sealing ring, pressure cooker ring heat resistant handle.
Cold resistance: ordinary rubber for later - 20 °, 30 °, is in the silicone rubber - 60 °, 70 ° has good elasticity, while some special formulation of silicon rubber can also withstand extremely low temperature, such as: low temperature sealing ring.
Disadvantages: it is not recommended to use most of the thick solvent, oil, thick acid, and diluted hydrogen peroxide.
Large size Standard O Rings, mold design, processing method adopting many modes of elongated upper and lower mould design, mould both ends closed can tear open outfit, guarantee the high sulfide, upper and lower mould respectively equipped with temperature in 30 to 250 ℃ adjustable heating device, temperature of mould mounted on both ends up and down in the 30 to 250 ℃ adjustable cooling device; Assumes that the upper and lower mold temperature between 150 to 220 ℃, the upper and lower mold testing dust removal process after clamping and heating regulation; According to the processing of Standard O Rings wire diameter requirements of preparing the width and height to determine strip, strip will be stated in the referred to upper and lower mold cavity after clamping, described in the closed vulcanizing mould at both ends up and down; Remove sulfide good strip continue to sulfide referred to upper and lower mould, after waiting for strip length to the total length, in turn until the completion of Standard O Rings docking repair edge detection, in order to realize the large size Standard O Rings preparation.
Standard O Rings most oil, especially resistant to paraffin oil, oil can be divided into two kinds, paraffin oil and aromatic oil, paraffin oil refers to the molecular structure of chain, aromatic oil containing benzene ring structure refers to the molecular chain of oil, such as common gasoline, oil, diesel oil, peanut oil, soybean oil belongs to such as paraffin oil; And pine tar, coal tar and so on belong to aromatic hydrocarbon oil. It is easy to understand, Standard O Rings this molecular chain contains -cn nitrile butadiene rubber (cyano) group, polarity rubber, paraffin oil molecular chain for linear, no polar group before, right and wrong polarity structure, aromatic oil containing benzene ring structure, and present a strong polarity, known as "similar" principle.