| 摘要 |
Plastic nonwoven fabrics are thermally bonded while maintaining the three-dimensional structures of the fibers thereof by heating to the heatproof temperature or higher by means of water vapor or the vapor of a nonaqueous solvent from a high-pressure steam sterilizer or a high-pressure steam boiler. In this manner, it is possible to overlap and themally bond three plastic nonwoven fabrics composed of different materials by heating to the heatproof temperature or higher by means of a high-pressure steam sterilizer. In a layered product (10), a plastic nonwoven fabric (shown as 11), a plastic nonwoven fabric (shown as 12), and a plastic nonwoven fabric (shown as 13) are thermally bonded while maintaining the three-dimensional structures of the fibers of each fabric. |
