| 摘要 |
PROBLEM TO BE SOLVED: To provide an impregnated paper free from formaldehyde being the cause of sick building syndrome, exhibiting excellent dimensional stability when absorbing water, and having a high interlaminar strength.SOLUTION: The impregnated paper formed by coating or impregnating a coating liquid at least containing a thermoplastic resin on or into an impregnation base paper is obtained by carrying out the papermaking of the impregnation base paper by mixing a chemical fiber, and using the coating liquid obtained by formulating a sulfamic acid salt as a dimension stabilizer. The chemical fiber of 5-40 mass% is preferably formulated based on the whole raw material pulp constituting the impregnation base paper. |
