The difference between liquid silicone products and solid silicone products

Liquid silicone rubber (LSR) and solid silicone rubber are two distinct materials with unique properties and applications. Here are the key differences between the two:

1. Physical State:

  • Liquid Silicone Rubber (LSR): LSR is in a liquid or semi-liquid state at room temperature and typically requires vulcanization (curing) to become solid. It is injected or poured into molds for various applications.
  • Solid Silicone Rubber: Solid silicone rubber is in a solid state at room temperature and does not require vulcanization. It can be fabricated into sheets, strips, or molded into various shapes.

2. Processing Method:

  • LSR: LSR is typically processed using liquid silicone injection molding. It involves injecting liquid silicone into a mold and allowing it to cure, forming the desired product.
  • Solid Silicone: Solid silicone can be fabricated through various methods, including compression molding, transfer molding, or extrusion. It can also be manually shaped and cut.

3. Vulcanization (Curing):

  • LSR: LSR undergoes vulcanization during the molding process to become a solid, elastic material with excellent properties.
  • Solid Silicone: Solid silicone does not require vulcanization and is already solid at room temperature.

4. Applications:

  • LSR: LSR is often used for intricate, high-precision components and products that require flexibility and durability. It is commonly found in medical devices, baby products, automotive parts, and consumer electronics.
  • Solid Silicone: Solid silicone is used in applications where flexibility and heat resistance are essential, such as gaskets, seals, insulators, and kitchenware. It can also be used for making custom silicone products, like phone cases.
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5. Material Characteristics:

  • LSR: LSR exhibits excellent temperature resistance, biocompatibility, and resistance to UV, chemicals, and aging. It can maintain its flexibility and elasticity over a wide range of temperatures.
  • Solid Silicone: Solid silicone is also known for its high-temperature resistance and durability. It is often chosen for its insulating and sealing properties.

6. Customization:

  • LSR: LSR is highly customizable and can be formulated to meet specific hardness, color, and performance requirements.
  • Solid Silicone: Solid silicone can also be customized but may have limitations in terms of intricate shapes and precision.

In summary, the choice between liquid silicone rubber and solid silicone rubber depends on the specific application requirements. LSR is favored for complex, precision parts, while solid silicone is often used in applications requiring heat resistance and flexibility. Both materials have unique advantages and are widely used in various industries.

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