Our Red Vulcanized Fiber Sheet is a high-strength cellulose-based insulation material widely used for electrical insulation, mechanical support, and die-cut components. Manufactured through a controlled vulcanization process, it offers excellent rigidity, impact resistance, wear resistance, and electrical insulating properties without the use of resins or adhesives.
Due to its outstanding toughness and machinability, red vulcanized fiber is commonly converted into insulation washers, gaskets, spacers, bushings, arc barriers, and custom industrial parts. It is widely used in electrical equipment, transformers, motors, switchgear, battery systems, and mechanical assemblies where reliable insulation and structural support are required.
We provide custom die cutting, stamping, CNC machining, slitting, and fabrication services with fast turnaround to meet your exact specifications.
1. High mechanical strength and impact resistance
2. Good electrical insulation properties
3. Excellent wear and abrasion resistance
4. Lightweight and resin-free cellulose material
5. Easy to punch, cut, drill, and machine
6. Stable performance under dry operating conditions
| Items | Unit | Standard | Result | ||
| Thickness | mm | 0.6±0.05 | 0.634 | ||
| Density | g/cm3 | 0.5mm-0.9mm 1.0mm-20mm 2.1mm-5.9mm ≥6.0mm |
≥1.1 ≥1.15 ≥1.15 ≥1.20 |
1.17 | |
| Breakdown Voltage (In(23±1)°Ctemperature) |
KV/mm | 0.5mm-0.9mm | ≥6.0 | 一 | |
| 1.0mm-20mm | ≥5.0 | ||||
| 2.1mm-5.0mm | ≥3.0 | ||||
| 5.1mm-12.0mm | ≥2.5 | ||||
| Cross-section tensile strength |
kN/m2 | 0.5mm-0.9mm | MD | ≥5.5X104 | MD 1.31X105 CMD 6.31X105 |
| CMD | ≥3.5X104 | ||||
| 1.0mm-20mm | MD | ≥6.0X104 | |||
| CMD | ≥3.5X104 | ||||
| 2.1mm-3.5mm | MD | ≥6.0X104 | |||
| CMD | ≥4.0X104 | ||||
| ≥6.0mm | MD | ≥5.0X104 | |||
| CMD | ≥3.0X104 | ||||
| Elongation percentage | % | 一 | 21 | ||
| 一 | 26 | ||||
| Volume Resistance | Q.cm | ≥108 | 1.9×1011 | ||
| Water Absorption | % | ≤65 | 82.5 | ||
| Gluing Coefficient | N/m | ≥200 | 231 | ||
| Zinc chloride content | 0.63 | ≤0.20 | 0.07 | ||
| Moisture content | 0.78 | 6-10 | 6.5 | ||
| Ash content | 0.9 | ≤25 | 0.59 | ||
• Electrical Insulation Washers
Used in motors, transformers, and switchgear assemblies.
• Die-Cut Gaskets and Spacers
Provide electrical isolation and mechanical support.
• Arc Barriers
Prevent electrical arcing in power distribution equipment.
• Mechanical Insulation Components
Used in industrial machinery and electrical assemblies.
• Custom Fabricated Parts
Converted into precision die-cut and CNC-machined components.
GBS offers custom converting services for red vulcanized fiber sheets, supporting both prototype and high-volume production.
Capabilities Include:
• Precision Die Cutting
• High-Speed Stamping
• CNC Machining
• Custom Sheet Cutting
• Slitting & Rewinding
• Laminating
• Prototype Sampling
Custom sizes, thicknesses, and fabricated insulation components are available upon request.
Q: What is red vulcanized fiber used for?
A: Commonly used for insulation washers, gaskets, spacers, arc barriers, and other electrical insulation parts.
Q: Can red vulcanized fiber be die cut?
A: Yes. It can be die cut, stamped, CNC machined, and fabricated into custom components.
Q: Is red vulcanized fiber electrically insulating?
A: Yes. It offers excellent electrical insulation and dielectric strength for industrial applications.
Q: What thicknesses are available?
A: Various standard thicknesses are available, with custom sizes and dimensions upon request.
Q: Can you manufacture custom washers and gaskets?
A: Yes. We provide custom die-cut washers, gaskets, spacers, and insulation components based on drawings or samples.
GBS Die Cut, as adhesive tape supplier, focuses on the research & development, production and sales of various types of adhesive tapes for different industries and has been authorized as golden distributor of many noted brands for so many years, such as Nomex, Formex, Rogers Poron, 3M, Tesa, and so forth.
Transformer insulation papers and flexible laminates are essential materials that ensure dielectric strength, thermal endurance, and mechanical stability in transformers, motors, and other electrical equipment. These materials are widely used
In the medical industry, medical tapes are not just for simple fixation; they play a crucial role in wound care, medical device adhesion, and surgical protection, directly impacting patient comfort
For inquiries about our products or price list, pls leave your email to us and we will be in touch within 24 hours.
