Now more more people like to make some handmade food molds by themselves. Many of them choose food-grade liquid mold silicone to make them, because they are easy to operate do require any equipment; but they often encounter feedback some customers about food-grade Why is the surface of the mold made of liquid mold silicone sticky, as if it is solidified, then today the Hongtu editor is here to analyze the reasons, according to the confirmation of the Hongtu technician, the cause of the food-grade silicone does cure the surface is sticky The main points are as follows:

The curing temperature of food silicone is too low during operation. Food silicone AB components are mixed in strict accordance with the specified ratio

The mixing process is complete, the mixing container is clean the mixing tool is clean, the surface of the original mold is treated (especially if the original mold contains heavy metal elements contains nitrogen, sulfur, phosphorus, tin, arsenic, mercury, lead, etc.). The material is polyurethane resin.

Solving these problems is relatively simple:

It can increase the curing temperature of food-grade silicone. In addition, increasing the curing temperature has the advantage of shortening the curing time. During the mixing process, the mixing should be carried out in strict accordance with the mixing ratio provided by the manufacturer. For example, the common mixing ratio of Hongtu silicone food-grade silicone is 1: 1 10:1.

When mixing the AB components of food-grade silica gel, be sure to use a clean container mixing tools. If conditions permit, it is necessary to spray a layer even multiple layers of release agent on the surface of the mold. The release agent can effectively block the contact between the silicone some chemicals in the mold that cause the silicone to cure.