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Quality problems of Silicone Rubber

Silicone rubber is renowned for its versatility and durability, making it an indispensable material in various industries, including automotive, medical, electronics, and consumer goods. Despite its numerous advantages, silicone rubber can sometimes present quality challenges that may affect product performance and customer satisfaction. BLISSAM, a leading chemicals products manufacturer, has identified common quality issues associated with silicone rubber and developed solutions to mitigate these problems effectively.

Understanding Silicone Rubber

Silicone rubber is a polymer composed primarily of silicon together with carbon, hydrogen, and oxygen. Its properties such as heat resistance, flexibility, and water repellency make it ideal for a range of applications. However, during the manufacturing or curing process, issues may arise that compromise the integrity and functionality of silicone products.

Common Quality Problems

  1. Cure Inhibition
    Cure inhibition occurs when silicone rubber does not properly cure or harden, resulting in a tacky or soft finish. This can be caused by contamination from substances such as sulfur, nitrogen, phosphorus, or certain organic compounds commonly found in mold release agents and gloves. BLISSAM addresses this issue by rigorously controlling the production environment and using specially formulated release agents that do not inhibit the curing process.

  2. Air Bubbles (Porosity)
    The formation of air bubbles in silicone rubber can significantly affect its mechanical properties and aesthetics. This problem is often a result of trapped air during the mixing or molding process. BLISSAM utilizes advanced vacuum degassing techniques that help reduce air entrapment. Their molding processes are meticulously monitored to maintain consistent pressure and temperature, minimizing the likelihood of bubble formation.

  3. Uneven Curing
    Uneven curing can lead to areas of varying hardness in a single product, which may affect its functionality and durability. Factors contributing to uneven curing include inconsistent mix ratios of the catalyst and the base material, as well as uneven temperature distribution during the curing process. BLISSAM ensures precise control over the mixing process with automated dosing equipment that delivers an accurate mix ratio within a variance of +/- 0.1%. Additionally, their state-of-the-art ovens provide uniform heat distribution to achieve consistent curing throughout the product.

  4. Premature Hardening or Scorching
    Premature hardening, or scorching, during the manufacturing process can render silicone rubber difficult to process and degrade its quality. This usually happens due to excessively high temperatures or prolonged exposure to heat. BLISSAM’s production lines are equipped with temperature-controlled systems that regulate the heat exposure accurately, preventing scorching and ensuring the material maintains its optimal properties.

  5. Oil Bleeding
    Some silicone rubber products may exhibit oil bleeding, where oil separates from the silicone and comes to the surface. This can affect the product's performance, particularly in sealing applications. BLISSAM has developed silicone formulations that maintain the chemical integrity of the silicone network, thus reducing the incidences of oil bleeding. This is achieved through the selection of high-purity raw materials and refining their polymerization processes to enhance the cross-linking density of the silicone.

BLISSAM's Commitment to Quality

As a committed chemicals products manufacturer, BLISSAM continuously invests in research and development to improve the quality of their silicone rubber products. Their laboratories are equipped to carry out a range of tests, including tensile strength, elongation, tear resistance, and compression set tests, to ensure every batch meets or exceeds industry standards.


While silicone rubber is an exceptionally useful material, its manufacturing process requires precise control and expertise to avoid quality issues. BLISSAM, with its advanced manufacturing techniques and stringent quality control measures, stands out as a leader in addressing the common quality problems of silicone rubber. By understanding and overcoming these challenges, BLISSAM not only enhances the performance of its products but also strengthens customer trust and satisfaction.




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E-mail: info@blissam.com


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