NON-ASBESTOS-BASED JOINT SHEET AND ITS PRODUCTION

PURPOSE:To provide a non-asbestos-based joint sheet capable of readily reconciling different two physical properties, e.g. tensile strength.and compressibility and its production method. CONSTITUTION:A substitute fiber for asbestos and rubber are used as the main materials and a mixture (A) having a high tensile strength and a low compressibility and another mixture (B) having a high compressibility and a low tensile strength are respectively prepared therefrom. The mixture (A) is initially fed to a space between calender rolls and put on the surface of a heated roll in layers so as to have a desired thickness under a plate-making condition optimum to the mixture. The mixture (B) is subsequently fed and put on the surface of the layered material in layers so as to have a desired thickness under a plate-making condition optimum to the mixture.