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What are the physical and chemical indicators of silica gel strips

by:Kenna     2021-05-31
What are the physical and chemical indicators of silicone strips, which are used to maintain the door, window glass, front and rear windows, triangular windows and other parts of the car body. Its better maintenance ensures safe and comfortable driving, but few car owners pay attention to its maintenance. In fact, its maintenance is very important, because once it is aging and damaged, it will cause rain leakage in the car, increase the driving wind noise of the car, and rain leakage can easily cause the body to rust. We can keep the car inside the car by maintaining it. Wind and rain, dustproof, heat and sound insulation effects, and when the body is shaken and distorted, it also plays a role in buffering, absorbing shock and maintaining glass. It also plays a decorative role on the edge of the door and window junction, so the owner must always Maintain it. Types and uses of door and window sealing strips Introduction: When we install doors and windows in our lives, there will always be certain gaps, which will cause the doors and windows to close tightly. The role of door and window sealing strips is used to eliminate these gaps. However, there are many types of door and window sealing strips, and their uses are also different. I have compiled some relevant information about the types of door and window sealing strips for everyone here. Door and window sealing strips can be divided into major categories in use: glass sealing strips, door leaf and door cover sealing strips and wool strips. The glass sealing strip is used to seal the gap between the glass leaf and the frame. The door leaf sealing strip is used to seal the gap between the door panel and the door frame, and the wool strip is mainly used to seal the gap between the frame and the door. It is said that in the installation process of various doors and windows, the sealing strip is indispensable. The sealing strip plays a role of sealing and waterproofing in plastic steel doors and windows, aluminum alloy doors and windows, and wooden doors and windows. Sealing strips have high requirements for materials. First of all, they must have strong stretchability and elasticity, as well as good temperature resistance and aging resistance. At the same time, in order to ensure the close contact between the sealing strip and the profile, the cross-sectional structure of the sealing strip must match the profile of the door and window, which is generally suitable for hanging windows and folding doors and windows. It is divided into self-adhesive type and card slot type. It is used in different doors and windows. It is more convenient and feasible in operation and installation. It does not react with any paint or cleaning agent. Customers do not need to worry about the integrity and beauty of doors and windows. Pieces: elastic pan seat and key or fixing screw 1. Use your nose to smell whether there is any peculiar smell. Normal PVC sealing strips will have a pungent smell, normal silicone rubber sealing strips will only have a little mellow smell , The smell is so small that it can hardly smell. 2. At the same time, put the silicone rubber sealing strip at high temperature for a period of time (placed on the roof or in a sunny place), the PVC sealing strip will become very soft in a short time, the grease on the surface of the sealing strip will be deposited, contaminated with dust, and Yellowing (oil is easy to absorb soil) seepage, dirty hands; the physical properties of silicone rubber sealing strips have no change, the pressure cooker sealing ring for household use is silicone rubber, which uses the high temperature resistance, non-toxic and environmental protection of silicone rubber Performance: There is no obvious change in physical properties of silicone rubber in a working environment of 200°C. The wool strip is generally used to install on the sash of the push-type door and window to seal the gap between the frame and the sash. The specifications of the tops can greatly affect the watertight performance of doors and windows, as well as the opening and closing of doors and windows. If the size of the top is too large, or the vertical hair is too high, it will be very difficult to assemble, and after it is assembled, the resistance of doors and windows will increase when they move. If the fire size is too small, or the vertical hair is too low, brackets are prone to occur in doors and windows, which reduces the airtightness of doors and windows. There are generally two types of tops that have undergone silicification treatment and those that have not been silicified. Generally, the treatment effect will be better. Quality tops have the following characteristics: there are no obvious defects in appearance, the surface is straight, the bottom plate and vertical hair are relatively smooth, there is no bending phenomenon, and there are no pits and other problems on the bottom plate, and it meets the size requirements. B. Sealing strip for continuous vulcanization in salt bath: Salt bath vulcanization adopts a salt bath system containing nitrite, which causes great environmental pollution and has been gradually eliminated. C, classified by section shape, can be divided into solid core products (round, square , Flat section shape), hollow products and metal-rubber composite products. EPDM rubber sealing strips are much stronger than PVC strips in terms of sealing elasticity and durability. However, due to the need for microwave vulcanization line shaping, processing performance High consumption, usually more than 20 times that of PVC processing, the product cannot be reused, it is not environmentally friendly, and it is not a recommended product. Fourth, the impact resistance is good. Many people want to use foam sealing strips as cushioning materials, because the impact resistance of this product is very good, the physiological stability of the rubber sealing strips is very good, and the resistance to deformation is also very good. It is strong, not only resistant to ozone but also resistant to ultraviolet rays, so this product has been widely used, and it is inseparable from many places such as medical diversion, electronics, wire and cable, etc. , This product also has a very good advantage, that is, long service life.
However, with the increased prevalence of rubber seal strip suppliers, it has become far more affordable.
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