Polyurethane material is currently the best thermal insulation material in the world. The main chain contains -NHCOO- repeating structural unit of a type of polymer. The English abbreviation PU. It is formed by polymerization of isocyanate (monomer) and hydroxyl compound. 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. It is not resistant to hydrolysis at high temperatures, nor is it resistant to alkaline media.

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Polyurethane oil seal is a seal made of polyurethane raw materials. It consists of at least a pair of cross-sections perpendicular to the axis of rotation under the action of fluid pressure and the elastic force of the compensation mechanism and the auxiliary seal to keep fit and slide relatively to prevent leakage. s installation.

&#;&#; One, polyurethane oil seal seal performance

&#;&#; Polyurethane oil seals are mainly used for hydraulic cylinders, which are easy to install and can scrape off the dust adhering to the piston rod. The green polyurethane oil seal has a slightly lower hardness, while the blue one has a higher hardness and can withstand greater pressure. Polyurethane oil seal has good physical and mechanical properties, wear resistance and oil resistance. It can 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.

&#;&#; 2. Use of polyurethane oil seals

&#;&#; Polyurethane oil seals are mainly used in hydraulic cylinders, which are easy to install and can scrape off dust and 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 most demanding working conditions and prevents the entry of external impurities, thereby achieving excellent sealing performance. It is the most commonly used seal in medium and high pressure hydraulic cylinders.

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&#;&#; Three, the advantages of polyurethane oil seal 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.

Introduction to polyurethane oil seal

Aug 29,

Polyurethane oil seal is also called PU oil seal, English name Polyurethane oil seal. This type of oil seal uses the best insulation material polyurethane (PU) on the market. It is a synthetic material between plastic and rubber. The products are made of thermoplastic and thermosetting properties, such as hard, soft and elastomer. Excellent wear resistance, oil resistance, aging resistance, radiation resistance, high pressure resistance, tear resistance, high elasticity, high oxidation resistance, shock absorption buffer and good hydrolytic stability, etc., can adapt to a wide temperature range -50~ 150 ° C. It is mainly used in hydraulic cylinders in hydraulic systems, as well as in automotive, smelting, petroleum, building materials, large machinery and other industries. Our company can customize all kinds of polyurethane oil seals with different appearance colors and shapes according to the drawings, materials, samples and specifications provided by customers.