Explore our top-tier engineering materials designed for critical fluid sealing, vibration isolation, acoustic damping, and industrial construction.
Dongguan Royflexa Rubber Co., Ltd. is an export-oriented, comprehensive and diversified large-scale private enterprise, taking the production of paper, gasket materials of flexible graphite, asbestos & non-asbestos, carbon black, and gasket & packing as the pillar industry, while also engaging in foreign trade, real estate, and scientific research simultaneously.
Since its establishment in 1996, by flexible management and continuous innovation, the group has achieved significant development—from a trading company to a business entity mainly engaged in scientific research and production.
We spare no effort to introduce international standardized management systems into our company. Our group has successfully passed ISO quality, environmental, occupational health, and safety management system certifications, improving product quality, environmental protection, production safety, and overall management level, and bringing the company onto an internationally standardized management track.
Information Gain Metric: Cork rubber sheet composites combine the natural cellular resilience of cork (*Quercus suber*) with the synthetic chemical resistance of nitrile (NBR), neoprene (CR), and silicone rubber. This hybrid matrix achieves high sealability at low bolt loads, eliminating side extrusion while maintaining anti-vibration hysteresis across temperatures ranging from -30°C to +150°C.
Paper, gasket materials of flexible graphite, asbestos & non-asbestos, carbon black, gasket & packing, and related products are all produced with world-class equipment and advanced manufacturing techniques imported by our company. These products offer reliable quality and competitive pricing. With a 60% increase in sales, our products have rapidly occupied markets both domestically and internationally and enjoy a strong reputation, earning wide recognition and praise.
All staff members of Dongguan Royflexa Rubber Co., Ltd., with renewed vigor and great enthusiasm, sincerely welcome friends and clients from all over the world to establish extensive cooperation and create a brilliant future together.
Understanding the synergistic interaction between granulated cork matrices and elastomeric binder systems under thermal and fluid dynamics.
Unlike pure elastomeric sheets that expand laterally under compressive load, cork granules possess a closed honeycomb cell structure filled with air-like gas. When compressed, cork reduces in volume without lateral side deformation, making cork-rubber composites ideal for narrow flange joints and recessed channels.
Formulated with premium Acrylonitrile-Butadiene Rubber (NBR) or Neoprene (CR), our rubberized cork sheets exhibit superior resistance to ASTM Oil No. 1, No. 3, transformer dielectric mineral oil, fuels, and industrial coolants, preventing volumetric degradation and micro-leakage pathways.
Bolted joint failure is frequently caused by gasket creep relaxation over thermal cycling. High-performance cork-rubber maintains bolt torque by damping mechanical shock and thermal expansion differential between mating metal flanges.
| Performance Characteristic | High-Performance NBR Cork Rubber | Standard Neoprene / EPDM Sheet | Non-Asbestos Fiber Sheet |
|---|---|---|---|
| Compressibility (at 400 psi) | 25% – 45% (High Conformability) | 10% – 20% (Moderate) | 7% – 15% (Rigid) |
| Recovery Rate | > 80% (Exceptional Hysteresis) | > 70% | > 50% |
| Side Extrusion Under Load | Near Zero (Volumetric Reduction) | High Lateral Bulging | None |
| Min. Flange Surface Finish Req. | Rough / Irregular Flanges | Smooth / Machined Flanges | Fine Machined Flanges |
| Oil & Solvent Resistance | Excellent (ASTM Oil #1, #3, Fuels) | Moderate to High | High |
Leveraging Dongguan’s world-class industrial eco-system to deliver uncompromised quality, custom compounding, and cost-effective high-volume global export.
At our Dongguan facility, we tightly control cork grain size distributions (0.5mm to 3mm) blended with tailored elastomer compounds (NBR, CR, ACM, Silicone). This granular precision ensures optimized density (from 550 kg/m³ to 1100 kg/m³) tailored specifically for automotive, electrical transformer, or acoustic isolation requirements.
All production batches undergo stringent laboratory testing under ASTM F104, ASTM F36 (Compression/Recovery), ASTM F37 (Sealability), and ASTM F146 (Fluid Immersion). We guarantee full compliance with EU REACH, RoHS, and international OEM procurement standards.
High-performance rubberized cork materials serve as essential components across diverse critical sectors:
Our core product line encompasses non-metallic, semimetallic, and metallic gaskets, alongside high-grade thermal isolation materials.
Our main products and materials are listed as follows:
Semimetallic Gasket: Spiral Wound Gasket, Metal Jacketed Gasket, Graphite Composite Gasket, Camprofile Metal Grooved Gasket.
Metal Gasket: Flat Metal Gasket, Solid Metal Serrated Gasket, Metal Ring Gasket (Oval Octagonal Ring Joint Gasket).
Non-metallic Gasket: Rubber Gasket, Asbestos Gasket, Non-Asbestos Gasket, PTFE Gasket, PTFE Coated Gasket, Graphite Gasket.
Sheet Gasket Materials: Flexible Graphite, Asbestos, Non-asbestos, PTFE, NBR Cork Sheets.
Packing: PTFE Packing, Graphite Packing, Aramid Fiber Packing, Carbon Fiber Packing, Vegetable Fiber Packing, Mineral Fiber Packing, Asbestos Packing.
Thermal Solutions Materials: Graphite, asbestos, fiberglass, ceramic fiber, carbon fiber.
Visualizing our advanced processing facilities, raw material synthesis, precision gasket cutting lines, and international logistics packaging.
Navigating environmental regulations, bio-based polymers, and optimization of global procurement specifications.
As global environmental regulations restrict hazardous substance usage, cork rubber stands out as a carbon-negative raw material source. Cork oak trees are harvested sustainably every 9 years without damaging the tree. Combined with eco-friendly bio-based NBR elastomers, our eco-friendly rubber cork tapes and sheets provide green building points (LEED) and reduced carbon footprint for industrial OEMs.
Modern automotive and electronic assemblies require complex multi-perforated kiss-cut gaskets with adhesive backing (PSA). Dongguan Royflexa utilizes automated high-speed CNC digital cutters and precision steel die-stamping presses to deliver kiss-cut cork rubber rolls and custom valve cover gaskets with tolerances as tight as ±0.1mm.
To ensure optimal material performance and exact price quotations, supply chain managers should specify the following parameters when issuing an RFQ for wholesale cork rubber sheets:
Expert answers regarding performance specs, manufacturing capabilities, and order customization.
Discover our secondary portfolio including raw cork granules, transformer seals, high-density spacers, and jointing sheets.
Royflexa Rubber
