Basic performance profile of Standard O Rings
The Standard O Rings is a synthetic rubber sealing ring made from butadiene and acrylonitrile. It is a synthetic rubber that is resistant to oil (especially nitrile rubber hydrocarbon oil) and aging resistance. The acrylonitrile content (%) in the acrylonitrile rubber is 42 ~ 46, 36 ~ 41, 31 ~ 35, 25 ~ 30, 18 ~ 24, etc. The more acrylonitrile content, the better the oil resistance, but the cold tolerance decreases accordingly. It can be 120 ℃ 120 ℃ in air or in the oil medium and long term use. In addition, it also has good water resistance, air tightness and good bond performance.
The hardness of the silicone standard o-ring is mainly related to the amount of filling and the crosslinking density of the binder. In the same conditions, the relationship between hardness and service life is first raised and then reduced to a parabola, if the use of the white carbon black is used. The optimal use hardness of silicone rubber in 40 to 60 degrees, the lower the hardness, reinforcing not completely, comprehensive performance is poor, the higher the hardness, large amount of white carbon black added, damage of silicone rubber itself structure, comprehensive performance is poor. Crosslinking density generally smaller effect on hardness, the use of silicone rubber is mostly general sulfide, compared to completely vulcanized silicone rubber hardness must be smaller, and the service life of the much smaller than cure completely. The wear resistance of silicone rubber products generally performed on the surface of silica gel products are vulnerable to loss of capacity, good general surface rarely silicone products due to external factors of friction surface, does not affect the appearance of the performance, character, color.
Qualified silicone pacifiers must be non-toxic and odorless and colorless and transparent, with 100% food grade (imported) silica gel materials; Very soft and flexible, the nipple can stretch to 5mm, so that the baby's tongue can act as freely as it would when sucking milk. The Standard O Rings mouth USES super soft silica gel, which is twice the thickness of ordinary pacifier, so that the baby will not be broken in the process of sucking, and it will not be damaged for long time. Qualified silicone ah you are most commonly used automatic production, the production process automatic without manual intervention to produce, and ensures the security environmental protection as the design and feel like real breast, let the baby in the process of sucking asing if is the same feeling when sucking milk.
The silica gel product has the production mold, why still open the sample mould? First of all, sometimes the client on the size of the silica gel products structure is not very accurate or entirely sure, we usually use sample mould for development, so it will be very convenient later modified structure to the size of the silica gel products. And sometimes the customer request to open mold but there is no image file, so we are only able to proofing samples (mould), use the sample to product structure size measurements, again by sample data measured data mapping, and then open mold, but by using data obtained from measurements usually may appear error, only with the sample mould can guarantee lower production mold revision number.
The silica gel Standard O Rings has excellent heat resistance, cold resistance, ozone resistance and atmospheric aging properties. It has good insulation performance, but the tensile strength is lower than the general rubber and it is not oily. Applicable to household appliances such as electric water heater, electric iron, microwave oven, etc. It is also applicable to all kinds of products that have contact with the human body, such as kettle, water dispenser and so on. It is not recommended for most concentrated solvents, oils, strong acids and sodium hydroxide. General use temperature range is - 55 ~ 250 ℃. The biggest characteristic is the combination of oil resistance and heat resistance.
The Standard O Rings is a circular rubber ring, which is called o-ring because of its type O. The most widely used in hydraulic and pneumatic transmission systems. The Standard O Rings is usually a circular rubber ring with a circular section. Under static conditions, the Standard O Rings prevents leakage of liquid and gas media. Under dynamic conditions, the Standard O Rings can also be used as the dynamic sealing element for axial reciprocating motion and low-speed rotary motion. According to different conditions, different materials can be selected to adapt. But life expectancy is much smaller than total vulcanization. Is widely used in various oil resistant rubber products, a variety of oil resistant gaskets, gasket, casing, flexible packaging, soft hose, printing and dyeing, plastic roller, plastic cable materials, etc., in automotive industry, aviation, petroleum, photocopying etc become indispensable in the elastic material.