Professional knowledge For Silicone Machine Products Material

2023-12-18

Under normal circumstances, when customers use liquid mold silicone to make molds, they will not deliberately dilute the silicone. They can solidify the silicone and become a silicone mold according to normal operating techniques. But there are also special cases. Some will add a certain amount of silicone oil and other substances to dilute the silica gel. What is the purpose of doing this? Is it necessary?

One of the reasons for dilution: The main components of liquid silicone are silica, silicone oil, 107 base rubber and other raw materials; however, in order to reduce production costs, many manufacturers add large amounts of silica (the cost of silica is lower, add more powder and less powder). Refueling, the overall cost decreases, but the quality also decreases), resulting in a greatly reduced fluidity of liquid silicone and high viscosity; this kind of liquid mold silicone with high viscosity and no fluidity is inconvenient for customers to operate, and it is difficult to remove air bubbles , the finished product qualification rate is very low.

Therefore, under such circumstances, for liquid silica gel with high viscosity and poor fluidity, silicone oil will be added to achieve a dilution effect and improve the fluidity; after adding silicone oil, the hardness of the liquid silica gel will decrease accordingly, and the performance of the silica gel will also decrease. It will be reduced accordingly. It is generally recommended that customers add no more than 10% of silicone oil. For every 2% of silicone oil added, the hardness of liquid silicone after curing will be reduced by 1 degree, and the tear resistance and tensile strength will also be reduced accordingly. It can be seen that it is necessary to choose regular liquid silicone and dilute it yourself. If it is not operated properly, the consequences will be very serious. silicone production

The second reason for dilution: Liquid silicone has a shelf life, and 3-6 months is the best use period; after more than half a year, liquid silicone will slowly thicken as the water inside evaporates, so it must be used before half a year. over. If it is not used up within the specified time, you can add a little silicone oil and stir, and the fluidity will be restored with little impact on performance (unlike adding a large amount of silica, such dilution has little impact on the overall silicone performance).

The purpose of diluting liquid silica gel is to restore its fluidity and reduce viscosity; but wouldn`t it be better to choose silica gel provided by regular manufacturers, or to use up the purchased liquid silica gel within the specified time without causing dilution? ?

Dongguan Jinyu Automation Equipment Co., Ltd are specialized in the development and manufacturing of PVC Machines, Silicone Machines, KPU Machines, such as silicone llabel printing machine, silicone Embossing Machine, silicone heat press Hydraulic Machine, silicone injection molding machine, PVC rubber patche machine, PVC Intelligent Oven, etc.

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