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Is work in rubber products harmful to health?
- In the manufacture of rubber products, the rubber itself is not toxic, but some agents are toxic, so most of the factories are now using intelligent small drug batching system, to avoid direct contact with the human body. In use, some contact with the human body rubber requirements are very high, from the choice of gum species (usually silicone rubber and PU), to the use of mixing agents, have strict requirements. If the general use, such as tires, seals and so on, and the body does not matter much.s
How to enhance the performance of water resistant silicone rubber products
- The purity of the filler and the amount of catalyst residue have great influence on the purity of the filler. In order to improve the steam resistance of silicone products / silicone rubber products, can be used to increase the crosslinking density and the hydrophobic filler method in silica raw material formulation, but should try to avoid the silicone rubber / silicone products using high pressure water vapor over 2MPa under. With this characteristic, the co vulcanizate of siloxane ethylene propylene rubber blends is the best.s
How to improve the aging resistance of rubber?
- In the course of oxidation, ozone can produce molecular cracks, but also make the deformed rubber crack in the direction of stress, namely ozone cracking".Heat will increase the temperature, thermal cracking or thermal crosslinking of rubber will accelerate the oxidation rate of the rubber, that is, heat aging.s
What is rubber damping material?
- According to the method of use, it can be divided into self-adhesive and film type, and the self-adhesive damping material can be directly adhered to the surface of the structural parts. The film type is used as a gasket or bonded by hot pressing and applying adhesive. It has been applied in many fields. Such as reducing the noise of the subway wheel, reducing the mechanical shock of the intercontinental missile detonating device.s
What about rubber molding, foaming and layering?
- Foaming1 vulcanization is not sufficient, the temperature is too low or time is too short, so that the volatile compounds produced during curing have not been cleaned out;2, under the pressure of vulcanization, the trapped gas and sulfur volatile matter can not be discharged in time3, there is air or moisture in the glue;4, curing temperature is too high, the surface of the gum material premature vulcanization, hindered the glue material in the steam, air free precipitation5 vulcanization speed of material is too fasts
What is the temperature of ordinary silicone rubber resistant to low temperature?
- Because the molecular structure of silicone rubber is amorphous, the temperature has little influence on its properties, and it has good cold resistance. The brittleness temperature of the general organic rubber is from -20 DEG C to -30 DEG C, while the brittleness temperature of the general silicone rubber is between -60 and -70 degrees centigrade. When the rubber is introduced in 7.5 (mol)% phenyl, brittle temperature of silicone rubber can be reduced to -115 DEG C, remain elastic at -90 DEG C and can use.s
What is the specific gravity of natural rubber?
- Natural rubber is elastic high polymer compound natural rubber tree cultivation, by cutting off the latex prepared by the steps of dilution, filtration, condensation, rolling and drying, commonly known as raw rubber or rubber. According to different preparation methods, there are wrinkle sheet gum, tobacco sheet glue and so on.s
Why does rubber burn black smoke?
- Rubber is filled with black carbon, which is used to dye, but to increase hardness, burning black smoke.s
what happens when pipes freeze
- Water expands when it freezes.If it freeze then the water pipe will be broken. Most piping systems allow for expansion and contraction, but only to a certain point. Once there is n...
How to keep water pipes from freezing
- If you don’t want to pay too much money for having your frozen water pipes fixed and be greatly inconvenienced, then follow the steps below to keep your water pipes in tip top sh...
What does rubber mean
- Rubber (Rubber): It is a kind of reversible deformation elastomeric polymer material. Under room temperature,it has the characterrictic of elastic. Under a small external force ,it...
What is a rubber tree
- Rubber trees, deciduous trees, have milky sap. It requires average annual rainfall of 1150 to 2500 mm, but rubber trees should not be planted in areas of low humidity. Suitable for...
Frozen pipes what to do
- If the supply line of pipes are frozen, you can flush the toilet once and use the water already stored inside the tank. The frozen pipe prevents fresh water from flowing into the t...