Discover our primary industrial rubber sheets, custom protective pads, and structural insulation solutions.
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.
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.
Why combining natural cork with elastomer matrix structures delivers superior sealability and mechanical performance.
Cork rubber is a composite material that integrates the cellular structure of natural cork with the elastomeric resilience of synthetic polymers. Natural cork contains millions of microscopic, air-filled polyhedral cells. Each cell behaves like a tiny, airtight cushion. When subjected to compressive loads, the air inside these cells compresses, allowing the cork to absorb high pressure without expanding laterally. This lateral expansion limit is unique to cork; standard rubber compounds bulge outwards when compressed, causing shear stresses that degrade the material over time.
By compounding granulated cork with specialized elastomers like Nitrile (NBR), Neoprene (CR), Styrene-Butadiene (SBR), or EPDM, manufacturers can create materials that offer the best of both worlds:
Offers sealing configurations that require low flange pressures. The internal air cells retain compressibility indefinitely, resulting in high bolt torque retention and seal longevity.
When bound with NBR, cork rubber provides exceptional resistance to aromatic fuels, mineral oils, hydraulic fluids, and grease, making it ideal for automotive and industrial engines.
The complex cell-matrix boundaries scatter sound waves and disrupt heat transfer, serving as an outstanding thermal isolator and soundproof floor underlayment.
| Elastomer Binder | Cork Content (%) | Tensile Strength (MPa) | Compression @ 400 psi (%) | Fluid Resistance Profile |
|---|---|---|---|---|
| Nitrile Rubber (NBR) | 50% - 60% | 1.8 - 2.5 | 30 - 45 | Excellent for petroleum oil, transformer oils, fuels |
| Neoprene Rubber (CR) | 45% - 55% | 1.5 - 2.2 | 25 - 40 | Good weathering, ozone, and moderate oil resistance |
| SBR / Natural Rubber | 60% - 70% | 1.2 - 1.8 | 35 - 50 | General purpose, low load seals, acoustic buffers |
| EPDM Rubber | 45% - 55% | 1.4 - 2.0 | 25 - 35 | Outstanding UV, steam, heat and weathering exposure |
Engineered to meet specific mechanical load cases across localized shipping, construction, and manufacturing sectors.
During international logistics, massive sheets of flat structural or automotive float glass are highly vulnerable to micro-fractures caused by dynamic shock waves. Our specialized PVC protection pads (such as the 18X18mm Red PVC Pads) and cork rubber spacer pads act as static shock dampeners. The high static friction coefficient of cork-rubber prevents glass panes from sliding against each other, eliminating scratches and pressure spots while maintaining structural integrity.
In high-density residential and commercial structures, impact noise (footsteps, moving furniture) propagates through concrete slabs. Our 2-10mm acoustic floor underlayment rolls and cork acoustic floor underlayments are engineered to decouple finished flooring from the structural slab. By absorbing the mechanical energy of impact vibrations, these systems achieve outstanding Impact Insulation Class (IIC) ratings.
Cork rubber gasket sheets are the standard choice for automotive valve covers, oil pans, and electrical transmission casings. Transformers demand absolute fluid containment and resistance to hot mineral dielectric oils. Nitrile-cork gasket sheets provide an airtight seal over uneven metal flanges, adapting to thermal expansion cycles without structural creep.
Due to their high loss-factor, cork-elastomer sheets are laminated inside aircraft cabin walls and ship hulls. They convert physical vibration energy into harmless thermal energy, protecting sensitive navigation electronics from low-frequency structural resonances.
Dongguan, China, is globally recognized as the central hub of advanced elastomeric and chemical manufacturing. As a major private group, Dongguan Royflexa Rubber Co., Ltd. benefits from a highly integrated regional industrial cluster. This localized vertical integration means raw synthetic rubber, high-grade cork wood imports, vulcanizing agents, and packaging components are sourced within a 50-kilometer radius.
A comprehensive breakdown of our heavy industrial sealing gaskets, packing, and high-temperature solutions.
Engineered for high-pressure oil, chemical, and gas pipeline flanges. Our range includes:
Designed for chemical inertness and low torque configurations:
Braided packing solutions for valve stems, reciprocating shafts, and rotary pumps:
Our packing series includes PTFE, graphite, aramid, carbon fiber, vegetable fiber, and mineral fiber formulations. They exhibit low friction, high chemical stability, and exceptional thermal dissipation.
Providing certified materials that meet global testing standards for health, safety, and environmental protection.
For OEMs, system integrators, and industrial buyers worldwide, material certification is a core requirement. Dongguan Royflexa Rubber Co., Ltd. ensures that all our cork rubber, gasket materials, and acoustic products undergo testing to comply with international regulations.
Our cork rubber materials are fully compliant with RoHS (Restriction of Hazardous Substances) and REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). We guarantee our products are free of heavy metals, polybrominated biphenyls, and phthalate plasticizers, ensuring safe application in food-contact, medical packaging, and high-purity systems.
Operating under ISO 9001:2015 (Quality), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health and Safety), our factories maintain complete batch traceability. Traceability records from raw compound to dispatched pallet are archived for up to 10 years.
Key questions and answers regarding industrial specifications, shipping parameters, and materials matching.
Under ideal warehouse conditions (15°C to 25°C, relative humidity under 65%, away from direct ultraviolet light), high-quality cork rubber sheets bound with NBR or Neoprene have a typical shelf life of 3 to 5 years. Standard SBR-based products should be used within 2 years. Overexposure to UV or extreme dry conditions can accelerate elastomer oxidation, leading to a loss of flexibility.
Red PVC pads are highly durable, UV-resistant, and leave no residue on structural glass surfaces. They are preferred for automated processing lines where glass panels are moved quickly. Cork pads, on the other hand, offer superior static load friction, which is highly beneficial for long-distance sea container transport of large float glass panes to prevent sliding.
Yes. The composite structure of cork acoustic rolls is engineered to distribute concentrated point loads. However, for high-traffic environments, we recommend a higher-density formulation (minimum 350-400 kg/m³) to prevent localized deflection and ensure the long-term durability of the flooring.
Every batch of incoming synthetic rubber, elastomer binder, and natural cork granules is subjected to rigorous internal quality checks. Density, cure curves, ash content, and particle sizes are verified. Only raw materials meeting our standards are fed into the automated mixing systems, maintaining batch-to-batch consistency.
Explore additional specialized solutions, from SBR raw materials to high-temperature non-asbestos composite rolls.
Royflexa Rubber
