Industry No.1 insulation performance! SGL's graphite/carbon soft felt [GFA] / [KFA]
SGL's soft felt GFA/KFA is based on rayon-based carbon fibers. Rayon-based fibers have a large surface area and high radiation effect. Therefore, they can exhibit higher thermal insulation performance. <Main Features> ◎ Excellent thermal insulation performance ◎ High temperature stability ◎ Flexibility ◎ Lightweight ◎ High purity compliance (ash content < 20 ppm) ◎ Chemical stability ◎ Low wettability (does not wet with molten metals or glass) ◎ Homogeneity (uniform throughout even in long rolls) ◎ Two types: graphite (GFA) and carbon (KFA)
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basic information
<Material Types> ■ Graphite Felt GFA (~2000℃) ■ Carbon Felt KFA (~1000℃) <Main Characteristics*> *Graphite Felt GFA, 11.5mm thick, inert gas ■ Standard Density 1000g/cm3 ■ Ash Content < 1000 ppm (standard) < 20 ppm (purified) ■ Thermal Conductivity (W/m·K) 0.12 (1000℃) 0.25 (1500℃) 0.58 (2000℃) ■ Maximum Operating Temperature 2000℃ *Further high-temperature compatibility possible through heat treatment <Size and Specifications> ■ Standard Size (Roll) Width 1200mm x Length 25~30m
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Applications/Examples of results
Insulation materials for various high-temperature furnaces
Line up（2）
| Model number | overview |
|---|---|
| SIGRATHERM GFA | "Graphite" soft felt insulation material. It boasts top-class excellent insulation performance among graphite felts. |
| SIGRATHERM KFA | "Carbon" soft felt. It has superior insulation performance compared to graphite felt at temperatures up to 1000°C. |
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Company information
SGL Carbon Group has a sales and service network in over 100 countries worldwide and has 29 manufacturing sites. (As of October 2023) SGL Carbon Japan Co., Ltd. is a Japanese subsidiary wholly owned by the group's headquarters, SGL CARBON SE.