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What is the difference between liquid silicone and solid silicone?

Aug 13, 2019

Liquid silicone
Liquid silicone is a relatively solid high-temperature vulcanized silicone rubber. It is a liquid glue with good fluidity, fast vulcanization, safer and more environmentally friendly, and can fully meet food grade requirements.
 
Solid silicone
Solid silica gel is a kind of cell-type polymer elastic material, which has the characteristics of high temperature resistance, cold resistance, solvent resistance, stagnation resistance, anti-sticking, electrical insulation and chemical industry, and has a wide application range.
Comparison of liquid silicone and solid silica gel
 
 
shape
 
As the name implies, liquid silicone is in a liquid state and has fluidity.
 
Solid silica gel is solid and has no fluidity.
 
safety
 
Liquid silicone is a food material with high transparency and high safety. It is not added with auxiliary materials such as vulcanizing agent during molding, and is sealed and molded.
 
Solid silica gel is a transparent and environmentally friendly material. It needs to be vulcanized for vulcanization molding time during molding, and it is molded by open mold.
 
Forming method
 
Liquid silicone is injection molded liquid silicone rubber (LSR): the full name is injection molding liquid silicone rubber, and the vulcanization equipment is injection molding machine.
 
The injection molding machine has a very simple process (no need for manual processes such as batching, rubber mixing, cutting, and arranging in the high-temperature glue process, only one worker can take the product), and the product has high precision (all manual procedures before molding) All are replaced by machines), high output (A/B glue mixed for a few seconds at a certain temperature), saving people, saving electricity, saving materials and many other advantages, can produce all high-temperature rubber production products.
 
The solid silicone rubber molding is a solid piece of material. After being kneaded by a mixer, the cutting machine cuts the appropriate size and thickness of the product and the mold, and then puts it into the mold and molds at a certain temperature under the pressure forming machine. When demolding is similar to plastic products, it is also necessary to clean the mold.
 
How to distinguish between liquid silicone and solid silicone products
 
Liquid silicone products have high transparency, no odor, and the product has a glue injection port.
 
Solid silicone products have low transparency, vulcanizing agents or other fragrances that mask vulcanizing agents.
 
Field of use
Liquid silicone is generally used in baby products and kitchen supplies as well as medical supplies to directly contact food and human body.
 
Solid silicone is generally used in daily necessities and industrial miscellaneous items, as well as in auto parts.

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