The silicone strip of cabinet is made of pure polytetrafluoroethylene dispersion resin by pressing and high temperature stretching. It has low friction coefficient, good chemical corrosion resistance and sealing performance. It can be used at - 250 ℃ ~ + 280 ℃, and it is suitable for sealing reaction kettle, steam transmission generator and various special-shaped cans and barrels. This kind of Teflon sealing tape retains the excellent chemical corrosion resistance of polytetrafluoroethylene, and has excellent flexibility, compression strength, creep resistance and cold flow resistance, as well as high tensile strength. Polytetrafluoroethylene elastic belt is made of pure polytetrafluoroethylene dispersion resin by pressing and high-temperature stretching. It has low friction coefficient, chemical corrosion resistance and good sealing performance. It can be used at - 250 ℃ ~ + 280 ℃, and is suitable for sealing reaction kettle, steam transmission generator and various special-shaped cans and barrels. This kind of Teflon elastic belt retains the excellent chemical corrosion resistance of Teflon, at the same time, it has excellent flexibility, compression strength, creep resistance and cold flow resistance, and has high tensile strength.
Selection skills of silica gel strip in cabinet
1. Smell with the nose. If there is any smell, please smell with the nose. Ordinary PVC material has a little mellow taste, almost no smell. 2. Check the appearance and sealing strip of the profile, wrap the silicone strip of the cabinet around the profile as closely as possible, and put it in high temperature (enough roof or sun) for a period of time, check whether the contact surface of the profile and the sealing strip will be stained and discolored, and whether there is dust and butter outside the sealing strip, regardless of dirty hands. 3. Look at the packing of window sealing strip. For some relatively cheap sealing strips, many of them are not very bright in appearance, which is not desirable. 4. According to the proportion, many manufacturers use a large number of fillers in the application of fillers. In order to seek a larger output value, the use of calcium and talcum powder as fillers greatly increases the proportion of sealing strip products, thus increasing the cost invisibly. Take a heavy calcium seal and stretch it several times by hand, a small amount of white powder will appear outside.
Development trend of silica gel strip for cabinet
At present, most of the raw materials used for cabinet silicone strip can still be used as raw materials for green rubber sealing strip, such as EPDM rubber, etc. Due to its high curing speed, good extrusion process performance, excellent ozone resistance, weather aging resistance and mature processing technology, the material is still the preferred rubber for the production of green rubber sealing strips for a long time in the future. The fast extrusion, semi reinforcement and universal carbon black with good extrusion process performance and large filling amount are the commonly used reinforcing agents for EPDM rubber, and they are also suitable for the production of green rubber sealing strips. The foaming agent for cabinet silica gel strip shall also be products of closed type, small pore diameter and uniform pore size. In order to reduce the pollution and dust flying in the production process of green rubber sealing strip, at present, the main additives are mother rubber granular curing agent and accelerator. Raw materials that are toxic or carcinogenic in the production process are forbidden to be used as raw materials for the production of green rubber sealing strips. Some materials that are harmful to the environment and human body should be selected as substitutes.
Performance of silicone strip for cabinet
The heat resistance of cabinet silicone strip is better than that of natural rubber, polybutadiene rubber and styrene butadiene rubber. The long-term use temperature can reach 100oC and 120oc can be used for 40 days. ① the ozone resistance is worse than Cr, better than NR ② the rubber is endowed with better physical and mechanical properties and wear resistance through reinforcement ③ when the acrylonitrile content of NBR is 39%, the air tightness is equivalent to IIR rubber, Good air tightness ④ general low temperature flexibility ⑤ good antistatic performance ⑥ good plasticizing effect with polar lipids ⑦ good compatibility with polar substances, such as PVC, acid resin, nylon
Characteristics and application of silica gel strip in cabinet
1. The silica gel strip of the cabinet has excellent high temperature and low temperature resistance, good physiological stability, small back deformation (200 ℃, 48 hours not more than 50%), breakdown voltage (20-25kv / mm), ozone resistance and UV resistance, widely used in medical diversion, electronics, lighter tubes, ignition gun tubes, wires and cables... Processed into sealing strips and flange rings in the dry setting It has a good performance, especially on the door of the dryer, which is more than three times the service life of ordinary rubber seals. 2. High temperature silicone rubber is a two-component warm vulcanized and room temperature vulcanized silicone rubber. It is a colorless or translucent oily liquid. After vulcanization, it becomes a soft elastic material. It can be used to make flexible silicone rubber products such as patches, anti-skid pads, and high-temperature mold