Shanghai Songjiang rubber joint factory direct quality and reliable

Shanghai Songjiang Group Co., Ltd. shock absorber made of rubber and rubber bear joint testing work on the problem of aging joints rubber joints, rubber joints rubber following is the aging test methods and standards: 1, rubber joint presentation: different materials in different conditions of use Under varying degrees of various factors, aging is not the same situation. Even if the same products, due to the different seasons and regions use the aging are different. Thus, the aging of the rubber is synthetic chemical reactions caused by many factors. Among these factors, the most common and most important factor is the oxygen and ozone chemistry; physical factors are heat, light, and mechanical stress. Aging general rubber products are the result of joint action by their one or several factors, the most common thermal aging, followed by ozone aging, fatigue aging and photo-oxidative aging. 2, rubber aging symptoms: rubber aging process is often accompanied by some remarkable phenomena, such as the appearance can be found in the long-term storage of natural rubber becomes soft, sticky, blotches; rubber deformation, brittle, hard, cracks, mold, loss of light and color changes. On the physical properties of the rubber has to change the swelling, rheological properties and the like. On the mechanical properties of tensile strength occurs, elongation, impact strength, flexural strength, compressibility, elasticity and other indicators declined. 3, rubber aging definition: raw rubber or rubber products in the processing, storage or use, will be affected by heat, oxygen, light and other factors, occur gradually erased the physical and chemical changes to performance degradation, and loss of use This phenomenon is called the aging of the rubber. 4, rubber anti-aging methods: Rubber & Plastics aging protection methods: with the aging process of rubber, rubber properties decreased, its value is gradually lost. Therefore, the study of aging and protective method has a very important practical and economic significance. Due to the aging of rubber is a complex integrated chemical reaction process, but also to absolutely prevent the occurrence of rubber aging is not possible. Therefore, only careful research led to the aging of rubber occur for various reasons, and these reasons the right remedy, to take appropriate measures to slow the rate of aging of rubber, rubber to achieve extended service life. Due to the aging of rubber products led to different factors, and therefore should take appropriate measures in accordance with the different aging mechanisms of aging, there are physical protection and chemical protection law. 5, rubber aging reason: rubber aging phenomenon occurs due to its long-term heat, oxygen, light, mechanical force, radiation, the role of chemical mediators, ozone in the air and other external factors, it macromolecular chains chemical change, destruction of rubber original chemical structure, leading to deterioration of rubber properties. External factors cause aging of rubber is mainly physical factors, chemical factors and biological factors. Physical factors including heat, light, electricity, stress and the like; chemical factors include oxygen, ozone, acids, bases, salts and metal ions; biological factors, including microorganisms (fungi, bacteria), insects (termites, etc.). These external factors in rubber aging process, more often than not act alone, but interact, rubber accelerate the aging process. The tire sidewall in the course will be affected by heat, light, alternating stress and strain, oxygen, ozone and other forms of factors. 6, physical protection method is a method to avoid aging factors interact with a variety of rubber, such as the use of rubber blends, surface coating or treatment with light shielding agent, plus paraffin. Chemical protection method refers to the active substance added to prevent or retard aging of rubber reaction to proceed, such as adding an amine or a phenolic antioxidant chemical. Aging mainly from an unsaturated double bond reduction of vulcanized rubber on the main chain of the polymer, such as, with some modification branched, use of special chemical reaction, the unsaturated bond is saturated, so that the level of molecular structure to be improved resistance aging ability, slow aging and prolong its life. Followed by adding antioxidant in rubber, plastic and other processing, for example, add in the formulation of the vulcanized rubber UV stabilizers, preservatives, heat stabilizers added to prevent ozone or oxygen caused by aging antioxidants. Again, we can use to increase physical protective coating and protective film methods such as dip coating anti-aging solution, painting, metallization, etc. 7, soft rubber joints rubber aging is a hot air aging, UV aging, general rubber joint use outdoors easy to aging, surface prone to cracking phenomenon by ultraviolet light irradiation, resulting in degradation of rubber joints rubber in advance. The above information is provided by Shanghai Songjiang damper Technology Group Ltd. This information is for reference only, not as the final answer. Shanghai rubber joint: www.jiuhu007.com Shanghai waterproof casing: www.shfstg.com