FIBER SHEET
First Claim
1. A fiber sheet, comprising:
- a surface sheet layer comprising a first surface sheet layer and a second surface sheet layer and comprising a paper material formed from pulp paper or from a material including pulp as a principal raw material; and
a softness imparting layer comprising a plurality of fibers of crushed pulp or a plurality of fibers of a material including crushed pulp as a principal raw material, and having a fiber density varying in a thickness direction of the fiber sheet such that the fibers are dense in a first side of the softness imparting layer and are sparse in a second side of the softness imparting layer opposite to the first side,wherein the fiber sheet is embossed and is applied with a binder, anda first joining strength joining the first surface sheet layer and the softness imparting layer at the first side of the softness imparting layer is stronger than a second joining strength joining the second surface sheet layer and the softness imparting layer at the second side of the softness imparting layer.
1 Assignment
0 Petitions
Accused Products
Abstract
A fiber sheet having both a bulky feel and softness is provided. A fiber sheet (1) is provided with a surface sheet layer (5) and a softness imparting layer (6). The fiber sheet (1) is subjected to embossing and a binder is applied to the fiber sheet (1). The softness imparting layer (6) is constituted by a plurality of fibers; and the fibers exist densely in a compressed state in a region of a boundary face between the surface sheet layer (5) and the softness imparting layer (6). Additionally, the surface sheet layer (5) is a paper material formed from pulp paper or a material including pulp as a principal raw material; and the softness imparting layer (6) is formed from crushed pulp or a material including crushed pulp as a principal raw material. Furthermore, the surface sheet layer (5) is manufactured by a paper making process; and the softness imparting layer (6) is formed by laminating crushed pulp along a flow of an airflow on a surface of the surface sheet. Moreover, depressions are formed via the embossing and, thereafter, the binder is applied.
4 Citations
20 Claims
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1. A fiber sheet, comprising:
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a surface sheet layer comprising a first surface sheet layer and a second surface sheet layer and comprising a paper material formed from pulp paper or from a material including pulp as a principal raw material; and a softness imparting layer comprising a plurality of fibers of crushed pulp or a plurality of fibers of a material including crushed pulp as a principal raw material, and having a fiber density varying in a thickness direction of the fiber sheet such that the fibers are dense in a first side of the softness imparting layer and are sparse in a second side of the softness imparting layer opposite to the first side, wherein the fiber sheet is embossed and is applied with a binder, and a first joining strength joining the first surface sheet layer and the softness imparting layer at the first side of the softness imparting layer is stronger than a second joining strength joining the second surface sheet layer and the softness imparting layer at the second side of the softness imparting layer. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19, 20)
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2-3. -3. (canceled)
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15. A fiber sheet, comprising:
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a surface sheet layer comprising a paper material formed from pulp paper or from a material including pulp as a principal raw material; and a softness imparting layer comprising a plurality of fibers of crushed pulp or a plurality of fibers of a material including crushed pulp as a principal raw material, wherein the fiber sheet is compressed or pressed in a non-wet state, and at least one surface of the fiber sheet is processed and then applied with a binder. - View Dependent Claims (16, 17, 18)
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Specification