Vulcanized Fiber (Fish Paper) Sheet
Fish-paper sheet for arc-facing and formed insulation parts. Vulcanized fiber sheet is formed, punched and machined for arc-facing insulation: barriers, arc chutes and gaskets. We supply it cut, punched and formed to the part drawing. Yes. It forms and punches well and resists arc, so it is used for arc chutes and barriers. Rolled and machined vulcanized fiber (fish paper) fuse bodies, thin-wall a
Fish-paper sheet for arc-facing and formed insulation parts. Vulcanized fiber sheet is formed, punched and machined for arc-facing insulation: barriers, arc chutes and gaskets. We supply it cut, punched and formed to the part drawing. Yes. It forms and punches well and resists arc, so it is used for arc chutes and barriers. Rolled and machined vulcanized fiber (fish paper) fuse bodies, thin-wall a
Technical specifications
| Material | Vulcanized fiber (fish paper) |
| Property | Arc-resistant, formable |
| Use | Arc-facing parts |
| Standard | ASTM D2491 (vulcanized fiber), IEC 60269 (fuse dimensions), UL 94 V-0 (flammability, material dependent). |
| Operating temperature | -40 °C to +105 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Information required for quotation
| Base tube | Approved material grade, ID, OD, wall and conditioning as per drawing |
| Datums | Drawing datum scheme and measurement reference |
| Key dimensions | Feature positions, depths, pitch and diameters reviewed before quotation |
| Thread / profile | Standard or custom profile, class, depth, engagement and gage method |
| Other features | Holes, slots, steps, chamfers, cuts and marking |
| Acceptance | Tolerances, sampling, gages, FAI and inspection report |
| Order | Prototype and production quantity, packaging and delivery target |
Applications by industry
- Fish-paper insulation sheets for LV panel and relay duty
- Transformer interlayer and core insulation paper
- Motor and generator slot-line insulation sheets
- Bobbin and spool flat-wound barrier material
- Punchable insulating sheets for small appliance relays
- Non-arc-facing low-cost sheet insulation
Why vulcanized fiber for this application
Vulcanized fish paper is the classic low-cost dense insulator sheet — it punches and die-cuts flat, grips the coil, and isolates at LV/motor temperatures without the cost of glass laminate.
Not arc-facing, low continuous temp (~105 °C) and moisture-sensitive; confirm dielectric per thickness. Specify conditioned roll stock for punching.
Standards: ASTM D2491, IEC 60672, UL 94 V-0 (grade dependent).
Feature and remaining-wall review
ID/OD ground or turned; CNC knurling, threading, slotting and cutting to drawing. Feature depth and remaining wall reviewed pre-quotation. Review feature depth, edge distance and remaining wall against critical geometries. Capability is confirmed on your drawing, not from a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
Custom Vulcanized Fiber Tubes
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Vulcanized Fiber Washers
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Vulcanized Fiber (Fish Paper) Rod
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Common questions
What is the standard for vulcanized fiber tubes used in fuse assemblies?
Vulcanized fiber tubes for fuse bodies are referenced to IEC 60269 for body dimensions and end-cap geometry. Material follows ASTM D2491 (fish paper) and UL 94 V-0 for flammability. Specify the fuse link type and voltage class and we confirm the grade and tolerance.
What tolerance can you hold on vulcanized fiber tubes?
On thin-wall vulcanized fiber sections we typically hold ±0.05 mm on ID and OD. Knurl pitch, major/minor diameter and position are reviewed per drawing. Capability is confirmed against your print, not published as a blanket claim.
Is vulcanized fiber suitable for arc-facing fuse applications?
No. For arc-facing surfaces, use ceramic-filled epoxy glass, melamine or synthetic arc-quenching composites. Vulcanized fiber is for non-arc-facing mechanical bodies and end caps.
Can you supply COA and batch traceability?
Every batch is traceable to the incoming material certificate. Material COA, first-article inspection (FAI), in-process checks and final inspection reports are supplied per your plan on request.
Fish paper sheet for arc chutes?
Every batch is traceable to the incoming material certificate. Material COA, first-article inspection (FAI), in-process checks and final inspection reports are supplied per your plan on request.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Vulcanized Fiber (Fish Paper) Sheet
Attach the drawing with annual volume. We check the material against your duty and tolerance, verify ID / OD / wall / features, and respond with manufacturability notes and pricing.