Chopped Fiber&Short Fiber Insulation Felt

BZNCarbon’s chopped fiber (or short fiber) insulation graphite felt is a next-generation high-temperature insulating material. Unlike layered rigid felt, this type is an integral monolithic structure, meaning the entire block is formed in one piece without lamination. This unique structure provides superior thermal insulation and mechanical stability in demanding furnace environments.

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Chopped fiber insulation felt is produced by vacuum-molding short carbon fibers into a single, seamless rigid block or shape. The fibers are directionally distributed using a vacuum slurry system, followed by curing, carbonization, and high-temperature treatment under inert gas or vacuum protection.

The result is a dense, non-delaminating, low-conductivity insulation material suitable for extreme conditions, with superior compressive and flexural strength compared to traditional rigid graphite felts.

Application Areas

Crystal growth furnaces (Czochralski and Bridgman methods)
Vacuum and inert gas high-temperature furnaces
Thermal insulation barrels and cylinders
Graphite-lined reactors
Nuclear and aerospace insulation
Energy storage systems requiring structural and thermal performance

Production Highlights

Molded using inner and outer cylindrical forms with vacuum ports
Precise fiber alignment through water flow shaping
Resin-carbon fiber slurry mixture molded and heat-treated
Single-piece formation—no layering or laminating required
Cost-effective and structurally efficient for insulation barrels

Technical Specifications

Property	Unit	Standard Value	Measured
Density	g/cm³	0.13–0.16	0.15
Thermal Conductivity	W/m·K (1000°C)	≤0.20	0.18
Compressive Strength	MPa	≥0.20	0.34
Flexural Strength	MPa	≥3.50	4.90
Ash Content	ppm	≤3000	1487