What is the hardness of general mold silicone

Mold silicone has a common hardness ranging from Shao A0 hardness to 70 hardness, while solid silicone has a hardness ranging from Shao A30-70 hardness. Liquid silicone with a hardness lower than Shao A0 hardness is also available, tin cure silicone mold but due to limited use, it needs to be customized and measured using Shao C hardness tester. Mold silicone can also produce materials ranging from A80 to 90 hardness, but it is relatively brittle and not commonly used. When it is higher than Shao A90, silicone is measured using Shao D hardness tester. This type of silicone has high hardness but little elasticity.

Generally speaking, when the hardness of silicone is below 10 hardness, the tear strength of silicone is low, the elongation is high, and silicone products are prone to deformation; When the hardness is higher than 40 hardness, the tear strength deteriorates, transparent silicone liquid and silicone products become brittle and easily break or break. When the hardness of silicone is generally between 20 and 40 °, the tear strength, elongation, etc. are the best conditions. In addition, the lower the viscosity (better fluidity), the more favorable it is for vacuuming and exhaust bubbles, but at the same time, the tear strength also decreases and the number of mold replicates decreases.
Food grade mold silicone is generally used for the production of silicone products such as baby bottles, nipples, and dental gum. What is the minimum hardness that can be achieved? In the hardness of silicone rubber, silicone that is generally less than 15 degrees is called low hardness soft gel. This type of silicone is generally relatively soft and easy to demould. Generally, the minimum hardness of added silicone can reach 0 degrees, and the minimum hardness of condensed silicone is around 3 hardnesss.

In short, mold silicone technology is commonly used at around 10 to 20 hardness. For some silicone miscellaneous products, silicone products made using liquid technology are not easy to self disassemble. Due to material reasons, this leads to a problem of uneven edges and burrs on the appearance of the product.