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Advantages and uses of polyurethane oil seals


Release time:

2021-09-15

Polyurethane material is currently the best thermal insulation material in the world. A class of polymers whose main chain contains -NHCOO- repeating structural units. English abbreviation PU. It is formed by the polymerization of isocyanates (monomers) and hydroxyl compounds. Due to the strong polar urethane group, it is insoluble in non-polar groups and has good oil resistance, toughness, abrasion resistance, aging resistance and adhesion.

Polyurethane material is currently the best thermal insulation material in the world. A class of polymers whose main chain contains -NHCOO- repeating structural units. English abbreviation PU. It is formed by the polymerization of isocyanates (monomers) and hydroxyl compounds. Due to the strong polar urethane group, it is insoluble in non-polar groups and has good oil resistance, toughness, abrasion resistance, aging resistance and adhesion. Different raw materials can be used to produce materials suitable for a wide temperature range (-50 to 150 ° C), including elastomers, thermoplastic resins and thermosetting resins. Not resistant to hydrolysis at high temperature, nor resistant to alkaline media.
Polyurethane oil seal is a seal made of polyurethane raw materials. It has at least a pair of sections perpendicular to the rotation axis to keep fit and slide relatively under the action of fluid pressure and the elastic force of the compensation mechanism and the cooperation of the auxiliary seal, thereby preventing leakage. installation.

1. Performance of polyurethane oil seals

Polyurethane oil seals are mainly used in hydraulic cylinders, which are easy to install and can scrape off the dust adhering to the piston rod. The green urethane oil seal is slightly less hard, while the blue one has a higher hardness and can withstand greater pressure. Polyurethane oil seals have good physical and mechanical properties, wear resistance and oil resistance. It can excellently prevent the entry of external impurities from affecting the effect of polyurethane, so as to achieve excellent sealing performance. Polyurethane oil seals are the most commonly used seals in medium and high pressure hydraulic cylinders.

Second, the use of polyurethane oil seals

Polyurethane oil seals are mainly used in hydraulic cylinders, which are easy to install and can scrape off the dust pollution adhering to the piston rod. In addition, the most commonly used seals in medium and high pressure hydraulic cylinders are polyurethane oil seals. It is suitable for the harshest working conditions and prevents the entry of external impurities, so as to achieve excellent sealing performance. It is the most commonly used seal in medium and high pressure hydraulic cylinders.

Third, the advantages of polyurethane oil seals

1. The physical properties of the polyurethane oil seal are stable and the sealing effect is good;

2. Polyurethane oil seal can effectively prevent the entry of external impurities and eliminate external interference;

3. Polyurethane oil seal has simple structure, simple manufacture and convenient installation;

4. Polyurethane oil seal has long service life, convenient disassembly, convenient inspection and low price.

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