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0086-574-87527773
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No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
In the vast world of industrial materials, few components are as fundamental and versatile as the Rubber sheet. This unassuming material forms the backbone of countless applications, from sealing gaps in machinery to providing anti-vibration mounts in heavy equipment. At Kaxite Sealing, we have dedicated decades to mastering the science and application of rubber sheeting, providing engineers and procurement specialists with reliable, high-performance solutions tailored to their exact needs. A rubber sheet is not merely a piece of elastomer; it is a precision-engineered barrier against environmental and operational challenges.
A rubber sheet is a flat, flexible material manufactured from various elastomers through processes like calendering or extrusion. Its primary function is to create a seal, absorb shock, insulate, or protect surfaces. The effectiveness of a rubber sheet hinges on its compound—the specific blend of polymers, fillers, plasticizers, and curing agents that determine its final properties. Kaxite Sealing excels in formulating these compounds to achieve targeted characteristics such as extreme temperature resistance, chemical inertness, or enhanced physical strength.
The choice of base polymer is the first critical decision. Different environments demand different materials.
At Kaxite Sealing, we define our rubber sheets by a comprehensive set of parameters. This ensures you select a material that performs reliably under your specific operating conditions.
| Parameter | Description | Typical Range (Varies by Compound) | Importance for Application |
|---|---|---|---|
| Hardness (Shore A) | Resistance to indentation, measured on a Shore A durometer. | 30 to 90 Shore A | Softer sheets (30-50A) conform better for sealing uneven surfaces. Harder sheets (70-90A) offer structural support and abrasion resistance. |
| Tensile Strength | The maximum stress the material can withstand while being stretched before breaking. | 5 MPa to 25 MPa | Indicates overall durability and tear resistance. Critical for dynamic seals and applications under tension. |
| Elongation at Break | The percentage increase in length a sample achieves before rupture. | 100% to 800% | Measures flexibility and ability to stretch without failure. High elongation is vital for seals in expanding joints. |
| Compression Set | The permanent deformation remaining after a material has been compressed for a set time at a specific temperature. | 10% to 40% (Lower is better) | A low compression set is crucial for gaskets and seals that must maintain sealing force over long periods without taking a permanent set. |
| Tear Strength | Resistance to the growth of a cut or nick when tension is applied. | 10 kN/m to 50 kN/m | Essential for sheets that will be cut, punched, or used in applications with sharp edges or high stress concentrations. |
| Resistance Type | Key Material Performers | Testing Standard / Notes |
|---|---|---|
| Temperature Range | Silicone (-60°C to +230°C), FKM (-20°C to +200°C+), EPDM (-50°C to +150°C) | Continuous operating temperature. Short-term spikes may be higher. |
| Oil & Fuel (ASTM Oil #3) | NBR, FKM, HNBR (Highly saturated Nitrile) | Volume swell < 40% after immersion is typically acceptable for sealing. |
| Weather & Ozone | EPDM, Silicone, Neoprene | ASTM D1149 / D1171. Critical for outdoor exposure preventing cracking. |
| Acids & Alkalis | FKM, EPDM (varies by concentration) | Chemical compatibility charts must be consulted for specific media. |
| Water & Steam | EPDM, Silicone | EPDM is renowned for excellent hot water and steam resistance. |
The versatility of rubber sheeting is demonstrated by its use across diverse sectors. Kaxite Sealing provides customized solutions for each.
Q: How do I choose the right rubber sheet material for my application?
A: Selecting the correct material requires analyzing the operating environment. Identify the key challenges: temperature extremes, exposure to oils/fuels/chemicals, UV/ozone exposure, required physical strength (hardness, tear resistance), and any regulatory requirements (e.g., FDA, NSF). Cross-reference these needs with material property tables. For complex applications, consulting with a technical specialist at Kaxite Sealing is highly recommended to review your specific media, pressure, and temperature conditions.
Q: What is the difference between a molded rubber gasket and a sheet gasket cut from a rubber sheet?
A: Molded gaskets are manufactured in a custom mold, creating complex, precise, and three-dimensional shapes often with integrated sealing beads. They are ideal for high-volume production of identical parts. Gaskets cut from a rubber sheet, whether die-cut, water-jet cut, or hand-cut, are more cost-effective for prototypes, low-volume needs, or large, simple shapes. Sheet gaskets offer great flexibility and faster lead times for custom sizes. Kaxite Sealing supplies high-quality sheets perfect for precision cutting.
Q: Can rubber sheets be joined or spliced together effectively?
A: Yes, certain rubber sheets can be joined using specialized rubber adhesives or vulcanizing splicing techniques. The success depends on the rubber compound. For example, EPDM and Neoprene typically bond well with appropriate contact cements. For a permanent, high-strength seam, vulcanization (using heat and pressure to chemically fuse the edges) is the best method. It's essential to clean surfaces thoroughly and use adhesives designed for the specific elastomer. Kaxite Sealing can provide guidance on bonding procedures for our materials.
Q: How does temperature affect the performance of a rubber sheet?
A: Temperature dramatically influences rubber properties. At high temperatures, rubber can harden, lose elasticity (increased compression set), and even degrade chemically over time. At low temperatures, rubber can become stiff and lose its sealing ability, potentially cracking under stress. Each elastomer has a defined operational temperature range. Exceeding this range can lead to rapid failure. Always specify both the minimum and maximum continuous operating temperatures of your application when selecting a sheet from Kaxite Sealing.
Q: What are the storage and handling recommendations for rubber sheets?
A: Proper storage extends shelf life. Store rubber sheets in a cool, dry, dark place away from direct sunlight, ozone sources (like electric motors), and heat. Ideal temperature is between 10°C and 25°C (50°F and 77°F). Keep sheets flat or rolled (not folded) to avoid permanent creases. Avoid contact with sharp objects, oils, solvents, and corrosive chemicals. Do not stack heavy items on top of stored sheets to prevent compression set. Following these guidelines ensures your Kaxite Sealing materials remain in optimal condition until use.
Q: Does Kaxite Sealing offer custom-compounded rubber sheets?
A: Absolutely. While we stock a wide range of standard compounds, our core expertise lies in developing custom formulations. If your application involves a unique combination of chemicals, extreme temperatures, or specific regulatory certifications, our R&D team can engineer a compound tailored to your precise requirements. This process involves reviewing your specifications, developing a prototype compound, and testing it to ensure it meets all performance criteria before full-scale production.
0086-574-87527773
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China