High strength non-woven fabric

A high-strength non-woven laminated nonwoven fabric having a thermoplastic synthetic long fiber having a fiber diameter of 7 to 20 μm as an upper layer, and a thermoplastic synthetic fine fiber having a fiber diameter of 5 μm or less as an intermediate layer, and each layer is integrally formed by pressure bonding. It is characterized in that the fine fiber has a structure in which at least one side of the long fiber layer enters the long fiber layer with an entry index of 0.36 or more, and the long fibers are combined, embedded or interlaced, and the laminated nonwoven fabric has a basis weight of 10 to 250 g/ Below m2, the bulk density is 0.20 g/cm3 or more. The spunbonded laminated nonwoven fabric of the present invention has durability due to its formation of a microfiber layer of a non-woven structure, and has various filtration and blocking functions, and its tensile strength is far superior to that of a spunbonded nonwoven fabric. .
[Technical claim] A high-strength non-woven fabric comprising a thermoplastic synthetic long fiber layer having a fiber diameter of 7 to 20 μm as an upper layer, and at least one layer of a thermoplastic synthetic fine fiber having a fiber diameter of 5 μm or less as an intermediate layer. Forming an integrated laminated nonwoven fabric, characterized in that a part of the fine fibers constituting the intermediate layer enters at least one side of the long fiber layer with an entry index of 0.36 or more, and the long fibers are bonded or embedded or interwoven. The mixed structural layer has a basis weight of 10 to 250 g/m 2 and a bulk density of 0.20 g/cm 3 or more.