| 摘要 |
PROBLEM TO BE SOLVED: To improve the transparency of an incombustible sheet comprising a glass fiber fabric and a photocurable resin impregnated in the glass fiber fabric.SOLUTION: There is provided an incombustible sheet comprising a glass fiber fabric and a photocurable resin impregnated in the glass fiber fabric. The photocurable resin contains a vinyl ester in which bromine is added to the main chain as at least a basic resin. The incombustibility of the incombustible sheet is further improved by adding a phosphoric acid ester such that the phosphorus concentration is 0.6 wt.% or more with respect to the photocurable composition. In addition, the photocurable resin can be cured by black-light illumination by adding a mixed catalyst of an alkyl phenone-based photopolymerization initiator and an acylphosphine oxide-based photopolymerization initiator to the photocurable resin. |
