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Those familiar with silicone know that molding silicone is divided into addition-cure and condensation-cure types. Today, HANAST will focus on understanding the definitions and advantages of addition-cure molding silicone to help customers interested in the silicone industry gain a more detailed understanding of addition-cure liquid silicone.

Addition-cure molding silicone is a widely used raw material with FDA food certification. It has excellent fluidity and is easy to handle. Besides ease of handling, it also has a series of advantages:

• it can be used for a long time in a temperature range of -65℃ to 350℃ while maintaining its soft and elastic properties;
• it is environmentally friendly and non-toxic;
• it has excellent electrical properties and chemical stability;
• it is water-resistant, ozone-resistant, and weather-resistant;
• it is non-corrosive;
• it is physiologically inert;
• it is non-toxic and odorless;
• it has low linear shrinkage;
• and it has a high number of mold-making cycles.

When the hardness of silicone is below 12A°, its tensile and tear strength decreases, resulting in fewer mold-making cycles, shorter service life, easy deformation, and poor aging resistance.

The best tear resistance hardness for silicone is 15-45, commonly used in injection-molded products and molds.

When the hardness of silicone exceeds 50°, the silicone has excellent hardness, but its tensile and tear strength will correspondingly decrease. After curing, the silicone becomes more brittle and easier to break.

For addition-cure silicone, lower hardness results in better flowability, while higher hardness leads to poorer flowability. Flowability is related to tear resistance.

If you need to purchase addition-cure silicone, please contact HANAST Silicone. Our addition-cure silicone has good tensile strength, high temperature resistance, tear resistance, and resistance to yellowing deformation. Its properties can be customized to meet customer requirements.