In mixed food grade liquid silicone, due to the liquid silicone is exposed to air in the process of mixing with air, so as to form bubbles, the bubbles can make the silicone mold after molding ugly appearance, rolling over the product also has many pores, normally we would use the vacuum machine exhaust bubble, but in the absence of a vacuum machine, How does food grade liquid silica gel exhaust bubble without vacuum machine?

  If only a little on the surface bubbles, the reason is that when mixed silicone and curing agent into the bubble has not ruled out clean, so we will follow the container when mixing the wall to stir clockwise, we make when perfusion liquid silicone filamentous slow downflow, so to pour over the getter bubble gum, Bubbles on the surface can be punctured with a toothpick.

  Food grade silica gel can be resistant to high temperature, when encountering a large number of bubbles, we can use a slightly higher temperature to bake the curing agent of liquid silica gel to remove impurities, so that the bubble is reduced after the use of a blower or air gun to blow away the bubble;Of course, you should also pay attention to whether the mold is for food, such as chocolate mold, you can use an air gun to blow away the surface bubbles.

  We can also prolong the curing time by controlling the proportion of silica gel and curing agent, so as to fight for time for the natural expulsion of bubbles. For example, the weight ratio of food-grade silica gel and catalyst is 1:1. We can slightly reduce the catalyst, so that the two components can be crosslinked and quick-frozen. The liquid food grade silica gel bubbles will be slowly discharged upward to reduce bubbles;You can also negotiate with food-grade liquid silica gel manufacturers for special adjustment operation time to control the removal of bubbles in the ordering link.

  The use of toothpicks or sharp air puncture bubbles, air blowers or air guns to blow bubbles can only eliminate the bubbles on the surface of food-grade silica gel, but can not ensure that the whole silica gel products do not contain bubbles.To remove the bubbles, you must use vacuum to vent the bubbles.