What is the shrinkage rate of liquid silicone products?

The shrinkage rate of liquid silicone rubber (LSR) products, which is the proportion of volume reduction from liquid to solid during the processing, is an important parameter in the manufacturing process. It is crucial to ensure the dimensional accuracy and consistency of the product.

Generally speaking, the shrinkage rate of LSR may vary depending on the specific material type, formula, and production process conditions. Ordinary liquid silicone typically has the following approximate shrinkage range:
Standard type: 1.5% -2.0%
High transparency or food grade: 0.5% -1.5%
Heat cured (HTV): 3% -7%

It should be noted that these values are only a rough range and cannot fully represent all types of LSR products. In practical applications, it may be affected by factors such as vulcanization temperature, vulcanization time, and mold design.

In the actual production process, in order to accurately control the shrinkage rate of liquid silicone products, a series of measures are usually required. For example, the shrinkage rate can be calculated and adjusted by accurately measuring the dimensions of molds and products; Meanwhile, by optimizing production processes and formulas, fluctuations and deviations in shrinkage rates can be reduced. In addition, advanced molding techniques and equipment can be used to improve the accuracy and consistency of the products.

The shrinkage rate of liquid silicone products is a complex and important process parameter. In the production and processing process, it is necessary to fully consider various influencing factors and take effective measures to control the size and stability of the shrinkage rate. Only in this way can we ensure that the quality and performance of liquid silicone products reach their optimal state, meeting the needs and expectations of customers.

It should be noted that although we have a certain understanding and mastery of the shrinkage rate of liquid silicone products, there may still be some unknown or uncontrollable factors in the actual production process. Therefore, we need to constantly learn and explore new technologies and methods to further improve the quality and performance of liquid silicone products. At the same time, we also need to strengthen communication and exchange with customers, understand their needs and feedback, in order to better adjust and optimize production processes and formulas.

To obtain accurate shrinkage data for specific silicone rubber products, it is recommended to consult material suppliers or use experimental methods to determine specific values under specific conditions. In addition, this parameter should also be considered when designing molds and production plans to ensure that product quality meets expected requirements.