What Are Silicone O-rings?
Silicone o-rings are a common kind of sealing. Because of its special performance, a wide range of temperature resistance, and excellent chemical properties, it is known as a special rubber with a fluorine seal.
Silicone rubber is widely used to make a variety of o-rings. The silicone rings can be divided into IDI rings, UN rings, UHS rings, OSI rings, UPH rings, YX rings, YA rings, QY rings, KY rings, O rings, rectangular rings, star rings, L collar rings, DKB type dust rings, DKI type dust rings, DKBI type dust rings, high-temperature resistant rings, rubber rings and more.
High-Temperature Resistance Silicone O-ring
High-temperature-resistant silicone O-ring is a kind of seal especially suitable for high-temperature places, such as electric ovens, high-temperature boxes, etc. The crisper seals, electric pressure cooker seals and so on we produced are high temperature resistant. Their main features of them are high-temperature resistance, and long-term use without deformation.
What Is the Performance of High-Temperature Resistant Silicone Seals?
• High-temperature resistance, high-pressure resistance, torsion resistance, and no deformation;
• Environmental protection, non-toxic, tasteless, high elasticity, high tensile strength;
• The bonding mouth is smooth and firm, and can withstand the pulling force of 5KG;
• Strong waterproof seal, long-term use without aging;
• After strict testing, it can pass FDA and other certifications;
• High-temperature resistant silicone seal is mainly used in food machinery, electronic and electrical equipment, daily necessities, hardware, communication equipment, sanitary ware, baby products, security and environmental protection, sports equipment, printing and machinery manufacturing, and other industries.
What is The Specification of High Temperature Resistant Silicone Seal?
Silicone Seal for Crisper
A silicone seal for the crisper is placed in the preservation the inside of the lid. It is waterproof, so we also call it a waterproof silicone seal for crisper.
We will design the silicone seal according to the real sample of the customer’s crisper box, and test repeatedly until there is no dripping and no air leakage.
• Excellent sealing performance, waterproof without leakage;
• The good fresh-keeping effect, completely non-toxic and tasteless;
• Can be placed under high-temperature heating, no deformation, no harmful substances;
• Good tensile resistance, through special inspection and testing;
• High sanitation and environmental protection level, through the ISO9000 series certification, FDA certification, and more.
What is The Vulcanization of Silicone Seals?
Vulcanization of silicone seal, to a certain extent, even if not heated, can continue to deepen the vulcanization process or under the dynamic action of the cross-linking phenomenon under the action of waste heat, or in the storage process of products. Of course, it also includes the processing technology of second-stage curing by continuing to heat; The purpose of secondary vulcanization of silicone seal is to further cross-link silicone products and improve the mechanical properties and deformation properties of silicone products.
The function of secondary vulcanization of silicone seals: When silicone seals are vulcanized by peroxide vulcanization, the polymer reaction cause peroxide decomposition, and the generation of low molecular compounds (such as benzene and benzoic acid, etc.) in the rubber will affect the mechanical properties of silicone rubber. Moreover, silicone in the first stage of heating molding, its cross-linking density is not enough, to make its further vulcanization reaction to increase the density of silicone, pull-up strength, resilience, hardness, swelling degree, density, thermal stability than vulcanization has been greatly improved. If the second vulcanization is not carried out, the performance of the silicone may be affected to a certain extent, and the performance of the product is not better.
What Factors May Affect the Service Life of Silicone Seals?
• Pressure and compressibility directly or indirectly affect the service life of the silicone seals.
The influence of the installation, every seal installation method is different. In such a long-term backlog of uneven force, it is easy to lead to compressibility deformation, when the silicone seals are unloaded again, there is likely to be a deformation phenomenon, so at the same time, it controls the balance and the degree of force uniform synthesis.
• The size tolerance of the silicone seals leads to the gap and deformation.
The gap problem can be divided into several factors: first, the problem of the silicone material. Many silicone materials may have poor resilience and insufficient tensile force due to the reason formula, resulting in little strength in the process of use, gap, and leakage phenomenon. The second is the processing problem of silicone product processing: the product is brittle, leading to the silicone seals’ rim thickness being relatively thin.
• The level of softness and hardness.
Many times, the different levels of softness of silicone seals can change the function of the product and structure, so the silicone seal in use process due to the choice of different hardness, after loading, the phenomenon such as stretching, squeezing, silicone seal will appear a kind of inevitable problems, such as a gap, too much stress state, the hardness is too high, the product deformation is not easy to rebound, and so on.
