How to distinguish solid liquid silicone products？

Silicone rubber is a commonly used chemical material in daily life. Silicone products also have a standard hardness distinction between soft and hard. Liquid silicone products and solid silicone products often use the Shore hardness for identification. The ability of a material to locally resist the intrusion of hard objects into its surface is called hardness. Silicone rubber has a Shore hardness range of 10 to 80.
Silicone hardness standards give designers full freedom to choose the hardness required to best achieve a particular function. Mixing polymer substrates, fillers and auxiliaries in different proportions can achieve various intermediate hardness values. Similarly, the time and temperature of heat curing can also change the hardness without destroying other physical characteristics.

Shore hardness of solid silicone products: 20-80 Shore hardness (values are for reference only)

Shore hardness of liquid silicone products: 10-70 Shore hardness (values are for reference only)

In the hardness range, it can be seen that the minimum hardness of liquid silicone products can not be achieved by solid silicone products. For example, in the medical industry, mother and baby industry, and health care products, liquid silicone products have absolute advantages.
The Shore hardness of silicone products is not an absolute reference value element for distinguishing solid silicone products from liquid silicone products. Liquid silicone application R & D engineers can often distinguish between solid liquid silicone rubber by simply looking at two, pulling, and hearing.

1. Look at the colors! Liquid silicone products have absolute transparency. Liquid silicone products can achieve 92% transparency. The solid silicone products cannot achieve high permeability, which depends on the molecular structure of the liquid solid.

2. Measure the stretch! The same is a silicone product. After the hand tensile test, it is found that the liquid silicone product will not show whitening due to the stretched product. When the solid silicone product reaches a certain level after stretching, there will be signs of whitening and uneven tearing. Whitening is also known as the burr.

3. Smell the smell! Liquid silicone products are odorless and odorless, and solid silicone products are accompanied by acidity.

In addition to these simple differences between solid liquid silicone products, there are more professional testing tools and methods to identify. Dimensional tolerance: Tolerance of liquid silica gel ± 0.05MM; Tolerance of solid silica gel ± 0.15MM; You can also distinguish between solid silica gel products and liquid silica gel products from the aspects of performance, manufacturing molds, production environment, product hygiene, production efficiency, raw material cost .