Silicone Rubber Gasket Customized by LSR Injection Molding

Silicone Gaskets and Seals: A Versatile Solution for Diverse Applications

Silicone gaskets and seals, often referred to as silicone washers or silicon sheets, offer a range of advantageous properties. Notably, silicone exhibits exceptional weathering capabilities, robust waterproof performance, high-frequency insulation, radiation resistance, and the ability to withstand both high and low temperatures, making it reliable in a temperature range of -40°C to 230°C.

It is essential to note that silicone gasket sheets may not perform optimally when exposed to oils, fuels, and hydrocarbons. However, they demonstrate reasonable resilience in the presence of acids, alkalis, and solvents. The physical properties, including tensile strength, abrasion resistance, tear resistance, and resistance to cut growth, are considered fair.

Silicone’s unique feature of being odorless and tasteless makes it suitable for diverse applications, especially in the manufacturing of electrical and electronic components. Additionally, its compatibility makes it an ideal material for potting and fixing coils. The medical industry also benefits from silicone’s properties, making it an excellent choice for medical equipment due to its reliability and longevity.

Product Description

Silicone Rubber Gasket Sheet Specifications:

Polymer: Polydimethysiloxane Durometer Rating (Hardness): 10 Shore A to 80 Shore A Working Temperature: -40°C to +240°C High Temperature: -50°C to +250°C Elongation at Break: 90% to 1120% Tear Strength: 9kN/m to 55kN/m Tensile Strength: 4.0 MPa to 12.5 MPa

Rubber Gasket Material Grade:

Within the intricate machinery of various equipment, silicone gaskets emerge as essential components, serving a crucial role in maintaining functionality and preventing leaks. The selection of the appropriate rubber sealing material becomes a pivotal factor in guaranteeing the overall quality and longevity of the end product.

Overview of Silicone Gasket Sheet Specifications and Material Grades

  1. Polymer Composition: The base material, polydimethysiloxane, forms the backbone of the silicone gasket, providing it with distinctive properties.
  2. Durometer Rating (Hardness): Ranging from 10 Shore A to 80 Shore A, this parameter signifies the gasket’s hardness level, offering flexibility for diverse applications.
  3. Temperature Resilience:
    • Working Temperature: Operating seamlessly in a broad range from -40°C to +240°C, making it suitable for various environments.
    • High Temperature: Exhibiting durability even in high-temperature conditions, with a range of -50°C to +250°C.
  4. Mechanical Properties:
    • Elongation at Break: A noteworthy 90% to 1120%, indicating the material’s stretchability and resilience under stress.
    • Tear Strength: Ranging from 9kN/m to 55kN/m, showcasing its resistance to tearing forces.
    • Tensile Strength: Varying from 4.0Mpa to 12.5Mpa, highlighting its ability to withstand tensile forces.

Silicone Gasket Material Grades:

Given the critical role silicone gaskets play in equipment, the selection process for the appropriate material grade becomes paramount. This choice not only influences the gasket’s performance but also impacts the overall reliability and efficiency of the machinery.

A meticulous examination of silicone gasket sheet specifications and material grades is indispensable for those seeking precision, durability, and optimal performance in sealing solutions across diverse industrial applications.

The Advantages of FDA-Grade Silicone Rubber Gasket

FDA-grade silicone stands out as an inorganic material, characterized by its cleanliness, lack of plasticizers, tastelessness, and odorlessness. Beyond these qualities, it boasts water resistance, oxidation resistance, and the ability to withstand various chemical substances. This makes FDA-grade silicone a preferred choice, particularly in applications where hygiene, purity, and safety are paramount.

Key Features of an FDA-Grade Silicone Gasket:

  1. Inorganic Nature: The inherent inorganic composition of FDA grade silicone ensures a clean and sterile material, ideal for applications demanding high levels of purity.
  2. Plasticizer-Free: The absence of plasticizers in FDA-grade silicone enhances its safety profile, making it suitable for applications where contamination from plasticizer compounds is a concern.
  3. Tasteless and Odorless: These attributes make FDA-grade silicone an excellent choice for applications in the food and medical industries, where maintaining the integrity of flavors and odors is crucial.
  4. Water-Proof: The gasket’s ability to repel water adds an extra layer of protection, preventing moisture infiltration and ensuring continued performance in various environments.
  5. Oxidation and Chemical Resistance: With the capability to resist oxidation and a range of chemical substances, FDA-grade silicone excels in environments where exposure to such elements is a concern.

FDA Grade Silicone Certification:

The FDA-grade silicone sealing gasket is not only designed for superior performance but also adheres to stringent regulatory standards. It meets food-grade and medical requirements, holding certifications such as USP Class VI, FDA 21CFR 177.2600, and BFR XV, among others.

Sterilization Options:

The versatility of FDA-grade silicone extends to its sterilization methods. Whether through steam autoclaving, ethylene oxide, gamma radiation, or e-beam sterilization, this silicone variant ensures that the highest standards of cleanliness and safety are maintained.

The FDA-grade silicone gasket is a reliable and versatile solution, excelling in applications where adherence to strict hygiene and regulatory standards is imperative.

Standards with Medical Grade Silicone Gasket

Silicone rubber emerges as a standout material for medical-grade gaskets, primarily due to its exceptional biocompatibility. Offering a unique set of advantages, medical-grade silicone gaskets are designed to meet stringent requirements for applications involving human tissue contact. Here are the key features that make them a preferred choice in the medical field:

  1. Biocompatibility: Silicone rubber demonstrates outstanding biocompatibility, causing no irritation to human tissue. It is non-toxic, minimizes the risk of allergic reactions, and experiences very little body rejection.
  2. Physical and Chemical Properties: The inherent physical and chemical properties of medical-grade silicone ensure reliability and stability. When in contact with body fluids and tissues, it maintains its original elasticity and softness without undergoing degradation. This stability is crucial for long-term medical applications.
  3. Resistance to High Temperatures: Medical-grade silicone gaskets are engineered to withstand high temperatures, allowing for effective disinfection processes. This property ensures that the gaskets remain sterile and safe for medical use.
  4. Inert Substance: Silicone rubber is a fairly stable and inert substance, making it an ideal choice for medical applications where stability and predictability are paramount. This inert nature contributes to its reliability and safety in medical environments.
  5. Ease of Processing: The processing, molding, and carving of medical-grade silicone are straightforward, facilitating the creation of customized shapes. This ease of use is advantageous for medical applications with varying requirements.

Medical Solutions with LSR Gasket

Additionally, advancements in technology have introduced liquid silicone rubber (LSR) as a material for medical-grade gaskets. LSR offers increased precision and efficiency in manufacturing. Its liquid form allows for intricate molding, resulting in gaskets with high precision and consistent quality.

Medical-grade silicone gaskets, whether in traditional silicone rubber or liquid silicone rubber form, represent a pivotal advancement in meeting the exacting standards of the medical industry. Their biocompatibility, stability, and ease of processing make them an indispensable component in medical applications requiring precision, reliability, and safety.

Specialized Silicone Rubber Gasket: Adhesive, Conductive, and Applications

  1. Adhesive Silicone Rubber Gasket:

    • Also known as adhesive rubber washers or gaskets, adhesive silicone rubber is crafted from elastomeric silicone rubber materials with backing on one or both sides.
    • The primary purpose of adhesive silicone rubber is to enhance the water-proofing and dust-proofing functions of electronic products.
    • Electronic products often use IPXX codes to designate their waterproof and anti-dust grades, such as IP55, IP56, IP57, etc.
  2. Conductive Gasket:

    • Conductive rubber, or electrically conductive silicone, refers to rubberized materials with electronic conductivity achieved through the incorporation of conductive particles such as silver, silver-plated aluminum, etc.
    • These conductive particles are uniformly dispersed in the silicone rubber, forming an electronically conductive network when pressure is applied. This network helps reduce or eliminate electromagnetic interference (EMI/RFI) noise associated with electronics.

Gasket and Seal Applications

LSR gaskets find diverse applications in various industries:

  • Electrical: Used in insulators, display screens, electronic screens, solar water heaters, and other electronic products.
  • Aerospace: Employed in seals for aerospace applications.
  • Office machines: Used in keyboards.
  • Medical Products Processing: Applied in the manufacturing of medical products.
  • Household Products Production: Utilized in airtight preserving boxes, lunch boxes, water cups, vacuum cups, pressure cookers, rice cookers, and more.

Sealing Gasket Molding Process & Molding Types:

  • Silicone Compression Molding: Employing compression molding techniques to craft silicone gaskets.
  • Silicone Injection Molding: Utilizing injection molding processes for precise and efficient production.
  • Silicone Extrusion Molding: Creating gaskets through extrusion processes is ideal for consistent and long profiles.
  • Die Cutting: A method involving cutting silicone sheets into specific shapes, offering versatility in design.

In summary, the world of silicone gaskets is diverse, ranging from adhesive solutions enhancing electronic protection to conductive variants mitigating electromagnetic interference. These specialized gaskets play vital roles across industries, contributing to the reliability and performance of various products and applications.

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