JP2017110329A5 - - Google Patents

Description

<41>
The laminated nonwoven fabric according to any one of the above <1> to <40>, comprising a thermoplastic fiber, having a first surface and a second surface located on the opposite side, at least The laminated nonwoven fabric which has the unevenness | corrugation in which the 1st surface has the some convex part which protrudes in the 1st surface side, and the recessed part located between this convex part.
<42>
The surface sheet for absorbent articles which used the laminated nonwoven fabric of any one of said <1>-<41> as a non-skin-contacting surface side as a surface with higher hydrophilicity.
<43>
Wherein a topsheet for an absorbent article according to <42>, before Symbol topsheet has a plurality of joints of the concave joining the layers by pressing in the thickness direction from the skin contact surface side ,
The layer on the non-skin contact surface side of the topsheet is a layer formed by heat shrinking heat-shrinkable fibers,
The layer on the skin contact surface side of the surface sheet has non-heat-shrinkable fibers partially bonded at the bonding portion, and protrudes toward the skin contact surface side in a region between the concave bonding portions. The surface sheet for absorbent articles which has a part and makes the uneven surface of a laminated nonwoven fabric.
<44>
It is a top sheet for absorbent articles as described in <42> above, and has a two-layer structure comprising a first nonwoven fabric on the skin contact surface side and a second nonwoven fabric on the non-skin contact surface side, which has a hollow portion. Yes, both layers contain thermoplastic fibers,
The first nonwoven fabric and the second nonwoven fabric have a joint part that is partially heat-sealed, and in the non-joint part surrounded by the joint part, the first nonwoven fabric projects in a direction away from the second nonwoven fabric. A large number of convex portions having the hollow portion are formed inside, and the joint portion is a concave portion located between adjacent convex portions, and constitutes concave and convex portions on the skin contact surface side together with the convex portion. A surface sheet for absorbent articles.
<45>
The top sheet for absorbent articles according to the above <42>, comprising a first fiber layer having a shape including thermoplastic fibers and uneven on both sides, and a surface on the non-skin contact surface side of the first fiber layer A second fiber layer bonded along the surface, and having a convex portion projecting on the skin contact surface side opposite to the surface on which the second fiber layer is disposed, and a depressed concave portion, A plurality of convex portions are arranged so as to surround, and the convex portions and the concave portions are alternately and continuously arranged in different directions intersecting in plan view of the topsheet. Surface sheet.
<46>
The surface sheet for absorbent articles according to the above <42>, comprising a first fiber layer and a second fiber layer containing thermoplastic fibers, wherein the second fiber layer is on the skin contact surface side, A semi-cylindrical convex portion and a plurality of concave portions arranged along the side edges of the convex portion are alternately arranged, and a concave bottom portion made of nonwoven fabric fibers is arranged below the concave portion. The top sheet of the absorbent article has a fiber density lower than that of the convex portion, and the first fiber layer is a layer partially laminated in the shape of the convex portion.
<47>
It is a surface sheet for absorbent articles as described in said <42>, Comprising: As for 1 layer among the two layers of the said surface sheet, the stripe-shaped convex part and concave line part extended in one direction are distribute | arranged alternately. The one layer has a plurality of heat fusion portions at the intersections of the constituent fibers, and when attention is paid to one of the constituent fibers, the constituent fibers are adjacent to the fusion portion. between each other with a large-diameter portion sandwiched between the two small-diameter portion smaller fiber diameter, the topsheet for absorption Osamusei article.
<48>
The absorbent article using the surface sheet for absorbent articles of any one of said <42>-<47>.
<49>
The absorbent article according to <48>, wherein the absorbent article is a sanitary napkin.

Claims (11)

A laminated nonwoven fabric having two adjacent fiber layers,
Of the two layers, one fiber layer is more hydrophilic than the other fiber layer, and
A laminated nonwoven fabric containing a liquid film cleaving agent that cleaves a liquid film formed between fibers of the laminated nonwoven fabric and on the fiber surface and inhibits the formation of the liquid film in at least one of the fiber layers. A laminated nonwoven fabric having two adjacent fiber layers,
Of the two layers, one fiber layer is more hydrophilic than the other fiber layer, and the contact angle of the fibers of the other fiber layer is 20 degrees or more,
A laminated nonwoven fabric containing a compound having a water solubility of 0 g or more and 0.025 g or less and an expansion coefficient of 16 mN / m or more for a liquid having a surface tension of 50 mN / m in at least one of the fiber layers.   A laminated nonwoven fabric having two adjacent fiber layers,
  Of the two layers, one fiber layer is more hydrophilic than the other fiber layer, and the contact angle of the fibers of the other fiber layer is 20 degrees or more,
  Laminated nonwoven fabric comprising polyoxyalkylene-modified silicone having a structure represented by any of the following formulas [I] to [IV] and having a water solubility of 0 g or more and 0.025 g or less in at least one of the fiber layers .

  Where R ³¹ Represents an alkyl group, R ³² Represents a single bond or an alkylene group. Multiple R ³¹ , Multiple R ³² May be the same as or different from each other. M ¹¹ Represents a group having a polyoxyalkylene group. Examples of the polyoxyalkylene group include a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a copolymer of these constituent monomers. m and n are each independently an integer of 1 or more. Of the liquid MakuHiraki cleaving agent, surface tension greater than the expansion factor for the liquid 50 mN / m is 0 mN / m surface tension of the interfacial tension relative to the liquid of 50 mN / m is as defined in claim 1 or less 20 mN / m Laminated nonwoven fabric. A laminated nonwoven fabric having two adjacent fiber layers,
Of the two layers, one fiber layer is more hydrophilic than the other fiber layer, and the contact angle of the fibers of the other fiber layer is 20 degrees or more,
At least one of the fiber layers has a water solubility of 0 g or more and 0.025 g or less, an expansion coefficient for a liquid having a surface tension of 50 mN / m is larger than 0 mN / m, and an interface for a liquid having a surface tension of 50 mN / m A laminated nonwoven fabric containing a compound having a tension of 20 mN / m or less.   The laminated nonwoven fabric according to claim 4 or 5, wherein the liquid film cleaving agent or the compound comprises a hydrocarbon compound represented by any of the following formulas [VII] to [XV].

  In the formulas [VII] to [XV], m, m ′, m ″, n, n ′ and n ″ are each independently an integer of 1 or more. The plurality of m and the plurality of n are the same or different from each other. In the formula [X], R ⁵² Represents a linear or branched, saturated or unsaturated hydrocarbon group having 2 to 22 carbon atoms.   The laminated nonwoven fabric according to any one of claims 1 to 6, wherein an expansion coefficient of the liquid film cleaving agent or the compound is 20 mN / m or more. The laminated nonwoven fabric according to any one of claims 1 to 7 , wherein the two fiber layers have a difference in contact angle of fibers between the layers of 5 degrees or more.   The distance between fibers of a laminated nonwoven fabric is 150 micrometers or less, The laminated nonwoven fabric of any one of Claims 1-8. The laminated nonwoven fabric according to any one of claims 1 to 9 , comprising thermoplastic fibers, having a first surface and a second surface located on the opposite side, and at least a first surface. However, the laminated nonwoven fabric which has the unevenness | corrugation which has the some convex part which protrudes in the 1st surface side, and the recessed part located between this convex part. An absorbent article using the layered nonwoven fabric according to any one of claims 1-10, as a surface sheet surface having the higher hydrophilicity as a non-skin contact surface side.