A Rubber Sheet is a versatile, flat, and flexible material manufactured from various elastomeric compounds. It serves as a fundamental component in countless industrial, commercial, and construction applications, primarily functioning as a barrier to seal against liquids, gases, dust, and noise, or to provide protection, insulation, and vibration dampening. The effectiveness of a rubber sheet depends heavily on its material composition, thickness, hardness, and other specific physical properties tailored to its intended environment.
At Kaxite Seals, we specialize in engineering high-performance rubber sheets designed to meet stringent operational demands. Our products are not just commodities; they are precision-engineered solutions crafted from carefully selected raw materials and subjected to rigorous quality control processes. Whether you require standard-grade materials or custom-formulated compounds for extreme conditions, understanding the detailed specifications is crucial for optimal performance and longevity.
Selecting the correct rubber sheet requires a detailed analysis of its technical parameters. Below is a comprehensive breakdown of the critical specifications we control at Kaxite Seals to ensure product excellence.
The base polymer defines the sheet's fundamental characteristics. We offer a wide range:
These quantifiable properties determine how the sheet will perform under stress.
| Property | Description | Standard Test Method (e.g., ASTM) | Typical Range at Kaxite Seals |
|---|---|---|---|
| Hardness (Durometer) | Resistance to indentation, measured on Shore A or Shore OO scales. | ASTM D2240 | 20 Shore A (Very Soft) to 90 Shore A (Very Hard) |
| Tensile Strength | The maximum stress the material can withstand while being stretched before breaking. | ASTM D412 | 10 MPa to 25 MPa (varies by compound) |
| Elongation at Break | The percentage increase in length before the material breaks under tension. | ASTM D412 | 100% to 800% |
| Compression Set | The permanent deformation after compressive force is removed, indicating sealing ability retention. | ASTM D395 | 10% to 40% (Lower is better for seals) |
| Specific Gravity | Density relative to water. Affects weight and material yield. | ASTM D297 | 1.0 to 2.0 g/cm³ |
Precision in size is critical for fabrication and fit.
Performance limits are defined by the compound choice. The following table provides a general comparison for key Kaxite Seals materials.
| Material | Continuous Temperature Range | Excellent Resistance To | Poor Resistance To |
|---|---|---|---|
| Nitrile (NBR) | -40°C to +120°C | Oils, fuels, aliphatic hydrocarbons | Ozone, weathering, polar solvents |
| EPDM | -50°C to +150°C | Steam, hot water, ozone, weathering | Mineral oils, fuels, solvents |
| Silicone (VMQ) | -60°C to +230°C | Extreme temps, oxidation, some acids/bases | Steam, concentrated acids/bases, solvents |
| Neoprene (CR) | -40°C to +100°C | Weathering, moderate oils, flame | Strong oxidizing acids, esters, ketones |
| FKM (Viton®) | -20°C to +200°C | High temp, oils, fuels, acids, aromatics | Ketones, esters, amines, hot steam |
Q: How do I choose the right rubber sheet material for my application?
A: The selection process involves answering key questions: What fluids or chemicals will it contact? (e.g., oil, water, acid). What is the operating temperature range? Is it for indoor or outdoor use (exposure to UV/ozone)? Is there a need for electrical insulation or food contact approval? What are the physical demands (tension, compression, abrasion)? Review the chemical and temperature resistance tables above and consult with Kaxite Seals' technical team. Providing as much detail as possible ensures a perfect match.
Q: What is the difference between molded and calendered rubber sheets?
A: Calendered sheets are produced by passing compounded rubber through heavy rollers to achieve a uniform thickness. They are cost-effective for large volumes and standard tolerances. Molded sheets are cured in a mold under heat and pressure, offering tighter dimensional tolerances, the ability to create specific shapes or profiles directly, and often superior physical properties due to controlled curing. Kaxite Seals utilizes both methods, choosing the optimal manufacturing process based on the required specifications and quantities.
Q: Can rubber sheets be joined or spliced together seamlessly?
A: Yes, effective joining is possible. For a permanent, high-strength bond, vulcanization (using heat and pressure to chemically bond uncured or partially cured edges) is the best method. For field repairs or assembly, high-quality rubber cements or contact adhesives designed for specific elastomers can be used. The surface must be clean, abraded, and primed for optimal adhesion. The bond strength will typically be lower than the parent material.
Q: How should I store rubber sheets to maximize their shelf life?
A: Proper storage is essential to prevent premature aging. Store sheets in a cool, dry, dark, and well-ventilated area, away from direct sunlight, UV light, and ozone sources like electrical motors. Ideal temperature is between 10°C and 25°C (50°F - 77°F). Keep them away from heat sources and fluids. Store sheets flat or on a roll to avoid permanent creasing or deformation. Do not stack heavy items on them. Under these conditions, most rubber sheets from Kaxite Seals have a shelf life of several years.
Q: What certifications or standards do Kaxite Seals rubber sheets comply with?
A: Our products are manufactured to meet various international standards depending on the compound and application. These can include ASTM (American Society for Testing and Materials), ISO (International Organization for Standardization), SAE (Society of Automotive Engineers), and FDA (U.S. Food and Drug Administration) CFR 21.177.2600 for food-contact grades. We also offer sheets compliant with REACH and RoHS directives. Specific certification documentation is available upon request.
Q: Are custom formulations and sizes available?
A: Absolutely. While we maintain a comprehensive inventory of standard materials, Kaxite Seals' core strength lies in engineering custom solutions. We can develop proprietary compounds to meet unique requirements for color, hardness, tensile strength, chemical resistance, or electrical properties. Custom sizes, die-cutting, slitting, and fabrication services are also available to deliver ready-to-install components, reducing your production time and waste.
Q: How is the quality of a rubber sheet ensured during production?
A: At Kaxite Seals, quality is integrated into every step. It begins with stringent raw material inspection. During compounding, precise control of ingredients and mixing parameters is maintained. The calendering or molding process is monitored for thickness and consistency. Post-curing, samples from every batch undergo rigorous laboratory testing against key parameters like hardness, tensile strength, elongation, and specific gravity as per ASTM standards. This data-driven approach guarantees that every sheet shipped meets the exact specifications promised.
