Liquid silica gel can be divided into addition silica gel and condensation silica gel, and can also be called food grade silica gel and industrial grade silica gel. According to different uses, fields and regions. Liquid silica gel can be used in the double mold of construction industry, molds for food, partial molds for mannequins, transfer printing heads for printing industry, silk-screen printing of silica gel, and directly made into finished silica gel products, such as pacifiers, breast stickers, insoles, nose pads of glasses, sealing rings, etc. Today, we are going to explain to you the knowledge about the viscosity of liquid silica gel.
First of all, let's talk about the pad printing silica gel used for rubber head. Its viscosity is close to 50 degrees of hardness, the raw materials are relatively thick, and the molecular weight combined with each other is relatively tight, but there is no fluidity. Of course, as for the rubber head, it is relatively hard for the product. It is necessary to adjust the viscosity of diluted silica gel through silicone oil to achieve the fluidity it needs, and finally complete the hardness of pad printing rubber head!
Mould silica gel for food has hardness. Thicker silica gel has higher hardness, and thinner silica gel with better fluidity has lower hardness. Therefore, the hardness and color can be adjusted according to the customer's needs! This raw material has excellent high temperature resistance, the temperature can reach 300-500℃, food grade, non-toxic and tasteless, and has passed FDA food grade certification. It is soft, elastic, kink resistant and does not deform; Non-toxic, odorless, non-yellowing, long service life, cold resistance and high temperature resistance, good fluidity and easy perfusion; It can be cured at room temperature or heated, which is convenient to operate!
Silk-printed silica gel raw material is also relatively thick, which is suitable for one-time molding of non-slip plastic processing. It is used for quick thickness, strong three-dimensional effect of silica gel and firm adhesion! If you do the trademark operation of printing pattern, you can adjust the fluidity through the thinning agent, which can be used to cover the surface to enhance the brightness, better highlight the vividness and flexibility of the pattern, and make the effect more natural and beautiful!
The higher the viscosity, the more the molecular weight of crosslinking is, the tighter it is, and the higher the hardness is. The viscosity of liquid silica gel has different advantages for different raw materials. Therefore, suitable silica gel raw materials should be selected for different products in operation. For different products, they can be used for different hardness and softness. When selecting, we can communicate with suppliers according to the actual product conditions, so as to better adjust a targeted silica gel raw material suitable for products!