Answer: Because the base material of liquid addition silicone is vinyl triethoxysilane as the main material, and its curing agent is platinum catalyst. Because platinum is a heavy metal product and is very delicate, it is most afraid of tin substances, so like Metals such as iron are prone to non-solidification. If it is not cured, the surface will become sticky, which is called poisoning or incomplete curing.
Answer: Because the curing agent of condensation type room temperature mold silicone is made of ethyl orthosilicate, if the platinum catalyst curing agent reacts with our silicone, it will never cure.
Answer: When the product is to be made of addition-type silicone, remember not to use the equipment used to make condensation-type silicone to make addition-type silicone products. If utensils are mixed, non-curing may occur.
Answer: First, when making molds, we must choose silicone with appropriate hardness according to the size of the product. Second, silicone oil cannot be added to the silicone, because the greater the amount of silicone oil added, the mold will become softer and the tensile strength will be reduced. and tear strength will be reduced. Silicone will naturally become less durable and its service life will be reduced. It is recommended that customers do not add silicone oil.
Answer: Yes. However, when brushing the mold, the thickness of the silicone must be uniform, because if it is not brushed evenly and no fiberglass cloth is added, the mold will be easily torn. In fact, fiberglass cloth is like why steel and gold are added to concrete.
Answer: The advantage of addition-type silica gel is that it does not release low molecules during use. Low molecules include a small amount of water, free acids, and some small amounts of alcohols. Its shrinkage is the smallest and generally does not exceed Two thousandths. The biggest advantage of addition-type silicone is its long service life, and the tensile strength and tear strength will not decrease or decrease during storage. Advantages of condensation silica gel: Condensation silica gel is easy to operate. Unlike addition silica gel, which is easily poisoned, it can generally be used under any conditions. The tensile strength and tear strength of the mold made with condensation silicone are better at the beginning. After being left for a period of time (three months), its tensile strength and tear strength will decrease, and the shrinkage rate will be greater than that of addition silicone. After a year, the mold was no longer usable.
Answer: The minimum temperature of the mold cannot be lower than 150 degrees, and preferably not exceed 180 degrees. If the temperature of the mold is too low, the curing time will be longer. If the temperature is too high, the silicone product will be burned.
Answer: Products made of additive molding rubber can withstand temperatures from 200 degrees to minus 60 degrees and can be used.
