Differences between LSR and HTV silicone rubber

As is well known, silicone rubber can be divided into two types based on its physical state: liquid silicone rubber and solid silicone rubber. These two types of silicone rubber have vastly different characteristics and usage processes. Below, we will provide a detailed comparison in various aspects to popularize the differences between liquid silicone rubber and solid silicone rubber.

1, Appearance characteristics

Before solidification, liquid silicone rubber is a viscous liquid with certain fluidity, which can be divided into two types: additive silicone and condensed silicone. Currently, most of the liquid silicone rubber on the market is two-component silicone, while a few are single component silicone. According to the curing method, it can be divided into RTV room temperature vulcanized silicone and HTV high-temperature injection molded silicone. Room temperature vulcanized silicone rubber, also known as AB, can be cured by mixing and stirring. If it is a single component silicone rubber, it is cured by attracting air and moisture. High temperature vulcanized silicone rubber is mostly formed by injection molding machine injection molding.

Before forming, solid HTV silicone rubber is in a soft solid state and does not have flowability. When forming, vulcanizing agents need to be added to mold or extrude at a certain high temperature. When demolding, HTV silicone rubber is similar to plastic products, and the mold also needs to be cleaned. HTV silicone rubber is a saturated polymer elastic material with characteristics such as high temperature resistance, cold resistance, solvent resistance, adhesion resistance, electrical insulation, and chemical properties.

2, Application field

Room temperature vulcanized LSR was originally commonly used for the production of silicone molds. Compared to steel molds, silicone molds made from mold LSR have significant advantages in terms of production power and production cost. They have been widely used in toy and gift work, medical, electronic, and mechanical fields, character reproduction, home construction and decoration work, unsaturated resin handicraft work, and simulated animal and plant sculptures, Making molds for various tasks such as Buddha carving crafts; High temperature vulcanized LSR is commonly used in medicine, food, infant and toddler products, diving products, electrical insulation accessories, and cable accessories, and can directly come into contact with food and the human body.

Solid HTV silicone rubber is generally used in daily necessities, industrial miscellaneous parts (sealing rings, silicone foot pads, etc.), automotive parts, etc., and has a wide range of applications.

3, Cost comparison

LSR has good stability, environmental protection, and low pollution, and the raw material price will be higher than that of HTV silicone rubber.

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