| abstract |
A carbon fiber felt constituted of a carbon fiber aggregate and a binder for joining the fibers of the aggregate is improved in fire resistance by incorporating a fireproofing agent into the felt. The fireproofing agent is composed of one or more members selected from among phosphorus compounds, boron compounds, silicone compounds, and so on. The fireproofing agent is used in an amount of about 1 to 30 parts by weight per 100 parts by weight of carbon fibers. The carbon fiber felts thus obtained and heat insulators made by using the same are excellent in fire resistance. |