JP2021167492A5 - - Google Patents

Claims (11)

A non-woven fabric having a binder and thermoplastic fibers and having fusion points between the fibers.
The non-woven fabric has an uneven shape on both sides and has an uneven shape.
At the center of the thickness of the nonwoven fabric, there is a fiber intersection where a fiber having a thickness direction component intersects with another fiber, and the binder is present at the fiber intersection.
The binder is a non-woven fabric that meets the requirements of either or both of the following (1) and (2).
(1) In the plan view of the nonwoven fabric, the abundance area ratio of the binder per unit area is smaller than the fiber area ratio of the portion not covered by the binder.
(2) The ratio of the mass of the binder to the mass of the nonwoven fabric is 65 percentage points or more smaller than the ratio of the fiber mass to the mass of the nonwoven fabric. A non-woven fabric having a binder and thermoplastic fibers and having fusion points between the fibers.
The degree of vertical orientation of the nonwoven fabric is 60% or more, and the non-woven fabric has a degree of vertical orientation of 60% or more.
At the center of the thickness of the nonwoven fabric, there is a fiber intersection where a fiber having a thickness direction component intersects with another fiber, and the binder is present at the fiber intersection.
The binder is a non-woven fabric that meets the requirements of either or both of the following (1) and (2).
(1) In the plan view of the nonwoven fabric, the abundance area ratio of the binder per unit area is smaller than the fiber area ratio of the portion not covered by the binder.
(2) The ratio of the mass of the binder to the mass of the nonwoven fabric is 65 percentage points or more smaller than the ratio of the fiber mass to the mass of the nonwoven fabric. The invention according to claim 1 or 2 , wherein in the plan view of the nonwoven fabric, the abundance rate of the binder on the fiber intersections on at least one of the front and back surfaces of the nonwoven fabric is 5% or more and 60% or less per unit area of the nonwoven fabric. Non-woven fabric. Any one of claims 1 to 3 in which the abundance rate of the binder on the fiber intersection in the thickness center portion in the cross section passing through the thickness center portion of the nonwoven fabric is 10% or more and 60% or less per unit area of the nonwoven fabric. The non-woven fabric according to item 1. Abundance of on the fiber intersection point of the binder when viewed in plan the non-woven fabric is greater while the opposite side than the surface side of the front and back surfaces of the nonwoven fabric has, according to any one of claims 1-4 Non-woven fabric. Any of claims 1 to 5 , wherein the abundance of the binder on the fiber intersection when the nonwoven fabric is viewed in a plan view is 10 percentage points or more larger on the opposite surface side than the one surface side of the front and back surfaces of the nonwoven fabric. The non-woven fabric according to item 1. The nonwoven fabric according to any one of claims 1 to 6 , wherein the mass of the binder is 1% or more and 20% or less of the mass of the nonwoven fabric. The nonwoven fabric according to any one of claims 1 to 7 , wherein the nonwoven fabric contains composite fibers having two or more kinds of resin components having different melting points. The nonwoven fabric according to any one of claims 1 to 8, which has a concave-convex shape including a convex portion, a concave portion, and a wall portion connecting the convex portion and the concave portion in the thickness direction of the nonwoven fabric. The non-woven fabric according to claim 9, wherein the binder is present on the wall portion. An absorbent article having the nonwoven fabric according to any one of claims 1 to 10.