JP2017115260A - Fiber sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convenient fiber sheet that strength and weakness of an effect of an added agent can be applied to one piece of the fiber sheet.SOLUTION: A fiber sheet 2 possesses multiple concave parts 7 and multiple agent arrangement parts 6 having an agent. The agent arrangement part 6 has an agent arrangement part on a concave part 61 arranged for the concave part 7 and an agent arrangement part on a non-concave part 62 arranged for concave part block area ET which is a non-concave part except the concave part 7. The greatest dimension of the agent arrangement part on the concave part 61 is bigger than the greatest dimension of the agent arrangement part on the non-concave part 62.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fiber sheet.

  For example, dirt removal sheets for electronic devices or panels with a cleaning solution applied to a fiber sheet, kitchen cleaning sheets with a cleansing agent applied to a fiber sheet, and floor cleaning with a dusting agent applied to a fiber sheet There are many functional sheets in which the agent is applied to the fiber sheet, such as sheets, wipe sheets for infants with a moisturizing agent applied to the fiber sheet, and surface sheets for absorbent articles in which an agent having a hydrophilic group is applied to the fiber sheet. Are known.

  As a technique different from this, Patent Document 1 describes an absorbent wearing article obtained by applying a printing pattern to a predetermined member of an absorbent wearing article by inkjet printing. Further, Patent Document 2 describes a nonwoven fabric printing medium having a nonwoven fabric layer that receives printing ink on its outer surface.

JP 2000-000266 A JP-T-2006-527101

  When using the functional sheet described above, it would be very convenient if the effect of the added agent could be applied to a single functional sheet.

  However, neither Patent Document 1 nor Patent Document 2 describes anything about attaching the strength of the effect of the agent added by printing to one sheet.

  Therefore, the subject of this invention is providing the fiber sheet which can eliminate the fault which the prior art mentioned above has.

  The present invention is a fiber sheet having a plurality of recesses and a plurality of agent placement parts having an agent, and having a longitudinal direction and a transverse direction, wherein the agent placement part is a recess top agent placement disposed in the recesses And a non-recessed upper agent arrangement part disposed in a non-recessed part excluding the concave part, and the maximum diameter of the concave upper agent arrangement part is larger than the maximum diameter of the non-recessed agent arrangement part Is to provide.

  ADVANTAGE OF THE INVENTION According to this invention, the strength of the effect of the added agent can be attached to one fiber sheet, and a convenient fiber sheet is provided.

FIG. 1 is a perspective view showing a sanitary napkin provided with a topsheet which is a fiber sheet according to a first embodiment of the present invention. 2 is an enlarged sectional view taken along line II-II in FIG. FIG. 3 is a plan view showing a main part on the skin facing surface side of the top sheet of the sanitary napkin shown in FIG. FIG. 4 is an enlarged cross-sectional view showing a main part of the sanitary napkin shown in FIG. 2 in an enlarged manner. FIG. 5 is a schematic view showing a manufacturing apparatus suitably used for forming a concave portion of the topsheet that is the fiber sheet of the first embodiment provided in the sanitary napkin shown in FIG. 1. FIG. 6 is a perspective view showing a sanitary napkin provided with a topsheet that is a fiber sheet according to a second embodiment of the present invention (corresponding to FIG. 1). 7 is an enlarged sectional view taken along line VII-VII in FIG. 6 (corresponding to FIG. 2). FIG. 8 is a plan view showing the main part on the skin facing surface side of the top sheet of the sanitary napkin shown in FIG. 6 (corresponding to FIG. 3). FIG. 9 is an enlarged cross-sectional view of the main part showing the main part of the cross-sectional view of the sanitary napkin shown in FIG. 7 further (corresponding to FIG. 4).

The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 shows a perspective view of a sanitary napkin 1 (hereinafter also simply referred to as “napkin 1”), which is an absorbent article using a fiber sheet according to an embodiment of the present invention as a top sheet 2. Yes. 2 is an enlarged sectional view taken along line II-II in FIG. 3 is an enlarged plan view of the main part of the napkin 1 shown in FIG. 1, and FIG. 4 is an enlarged cross-sectional view of the main part of the napkin 1 shown in FIG.

  As shown in FIGS. 1 and 2, the napkin 1 includes a top sheet 2, a back sheet 3, and an absorbent body 4 interposed between the both sheets 2 and 3. The napkin 1 has a vertically long shape, and has a vertical direction and a horizontal direction. In FIG. 1, the vertical direction and the width direction are shown as an X direction and a Y direction, respectively. The vertical direction is a direction that coincides with the wearer's front-rear direction when the napkin 1 is worn, and the horizontal direction is a direction orthogonal to the vertical direction in plan view of the napkin 1. Moreover, the thickness direction of the napkin 1 is demonstrated as a Z direction. In addition, the vertical direction X, the horizontal direction Y, and the thickness direction Z of the napkin 1 are in agreement with the vertical direction X, the horizontal direction Y, and the thickness direction Z of the surface sheet 2 that is the fiber sheet of the first embodiment.

  As shown in FIG.1 and FIG.2, the surface sheet 2 which is the fiber sheet of 1st Embodiment has liquid permeability, and forms the skin opposing surface in the napkin 1 which opposes a wearer's skin at the time of wear. ing. The back sheet 3 has liquid impermeability and forms a non-skin facing surface that is a surface of the napkin 1 opposite to the skin facing surface. Here, the liquid impermeability of the back sheet 3 is meant to include poor liquid permeability. The top sheet 2 covers the entire skin-facing surface of the absorbent body 4 that is long in the vertical direction X, and further has portions extending outward from both ends in the vertical direction X, and outward from both sides along the vertical direction X. It has the part which extended to. Portions extending outward from both sides along the longitudinal direction X in the topsheet 2 are folded back to the non-skin facing surface side of the absorbent body 4. The back sheet 3 covers the entire non-skin facing surface of the absorbent body 4 and has portions extending outward from both ends in the longitudinal direction X of the absorbent body 4. The top sheet 2 and the back sheet 3 are fixed to each other by fusion (heat embossing, ultrasonic embossing, high frequency embossing) or an adhesive at the portions extending outward from both ends in the longitudinal direction X of the absorber 4. Yes. Further, the portion of the top sheet 2 that is folded back to the non-skin facing surface side of the absorbent body 4 and both side portions along the longitudinal direction X of the back sheet 3 are fixed to each other with an adhesive or the like. Thus, the rectangular absorbent body 4 that is long in the longitudinal direction X is sandwiched between the top sheet 2 and the back sheet 3. In addition, the adhesion part 5 for fixing to underwear, such as shorts, is provided in the non-skin opposing surface of the back surface sheet 3 of the napkin 1. FIG.

  As the forming material of the back sheet 3, various materials conventionally used for the back sheet of the absorbent article can be used without particular limitation. For example, a liquid-impermeable or water-repellent resin film, a resin film, A laminate sheet with a non-woven fabric can be used.

  As the absorbent body 4, various kinds of conventionally used absorbent bodies for absorbent articles can be used without particular limitation. For example, an absorbent core composed of absorbent polymer particles and a fiber material is used as a tissue paper. What was coat | covered by this, or what was comprised from the absorptive sheet | seat can be used. As an absorbent sheet, it is possible to bond between constituent fibers or between constituent fibers and the water-absorbing polymer through adhesive force generated in the water-absorbing polymer in a wet state or a binder such as an adhesive or adhesive fiber added separately. A sheet or the like can be preferably used. Further, as an absorbent sheet, an absorbent sheet manufactured by the method described in JP-A-8-246395, a pulverized pulp supplied in an air stream, and a water-absorbing polymer are deposited, and then an adhesive (for example, vinyl acetate) is deposited. -Based adhesive, PVA, etc.) dry sheet, absorbent sheet obtained by spraying superabsorbent polymer after applying hot melt adhesive between paper and nonwoven fabric, pulp airlaid nonwoven fabric, spunbond It is also possible to use an absorbent sheet or the like obtained by blending a highly water-absorbing polymer during the nonwoven fabric or melt blown nonwoven fabric manufacturing process.

  The fiber sheet of the first embodiment is formed from a nonwoven fabric. Although the constituent fiber is not particularly limited, the napkin 1 using the fiber sheet of the first embodiment as the top sheet 2 is formed of a nonwoven fabric mainly composed of thermoplastic fibers. Here, examples of the thermoplastic fiber include a fiber formed from a thermoplastic resin such as polyolefin and polyester. Such a thermoplastic fiber may be a fiber consisting of a single polyolefin or a single polyester, or a mixed spun fiber or a composite fiber of two different polyolefins or polyolefin and another polymer (core-sheath type, side-by-side type, (Alternate arrangement type, sea island type, etc.)

  Preferably, examples of the polyolefin include polyethylene, polypropylene, polybutene-1, polypentene-1, and random or block copolymers thereof. Examples of the polymer that can be mixed or combined with the polyolefin include polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyamides such as nylon-6 and nylon-66.

  When using the fiber sheet of 1st Embodiment for the surface sheet 2, it is preferable that the ratio of the thermoplastic fiber in the nonwoven fabric which comprises the surface sheet 2 is 80 mass% or more in the constituent fiber of a nonwoven fabric, and 90 mass% More preferably, it is more preferably 100% by mass.

  When using the fiber sheet of 1st Embodiment for the surface sheet 2, as the nonwoven fabric which comprises the surface sheet 2, the nonwoven fabric manufactured by various manufacturing methods can be used. For example, nonwoven fabrics manufactured by the spunbond method and melt blown method, webs obtained by using a card machine converted to nonwoven fabrics by an air-through method or a heat roll method, webs obtained by using a card machine, needle punch method Or a non-woven fabric made by a spunlace method or the like can be used. The nonwoven fabric is preferably a single layer nonwoven fabric, that is, a single nonwoven fabric, but may be a laminated nonwoven fabric obtained by combining and integrating the nonwoven fabrics.

  When the fiber sheet of the first embodiment is used for the topsheet 2, the topsheet 2 is a hydrophilic nonwoven fabric, even if it is a hydrophobic nonwoven fabric as long as it is a nonwoven fabric mainly composed of thermoplastic fibers. Also good. As the hydrophobic non-woven fabric, the thermoplastic fiber without kneading a hydrophilic agent or adhering the hydrophilic agent to the surface of the thermoplastic fiber, which is a main constituent fiber, is used. And a hydrophobic nonwoven fabric using as a hydrophobic fiber. As the hydrophilic non-woven fabric, a hydrophilic agent is kneaded into the thermoplastic fiber which is a main constituent fiber, or a hydrophilic agent is attached to the surface to hydrophilize the thermoplastic fiber. And a hydrophilic nonwoven fabric. In the napkin 1, a hydrophobic nonwoven fabric is used as the top sheet 2.

  The fiber sheet of the first embodiment includes a plurality of recesses 7. Here, the concave portion means embossing for heat-bonding the constituent fibers of the nonwoven fabric to form irregularities, embossing for pressurizing and pressing the constituent fibers of the nonwoven fabric without applying heat, and a plurality of nonwoven fabrics By embossing widely, embossing for heat-sealing the nonwoven fabrics to combine and integrate, or embossing to press and bond the nonwoven fabrics without applying heat, etc. It is the meaning including the recessed part formed. In the napkin 1 that uses the fiber sheet of the first embodiment for the top sheet 2, the top sheet 2 is a non-woven fabric with concave and convex shapes having concave portions 7 as shown in FIGS. Is heat-sealed, and the fiber density of the recess 7 is higher than the fiber density of the portion other than the recess 7. That is, in the concave portion 7 of the napkin 1, the constituent fibers are heat-sealed and the fiber density is relatively high.

  When the fiber sheet of the first embodiment is used for the top sheet 2, the shape of the recess 7 is not particularly limited as long as it is embossed by unevenly forming the nonwoven fabric by heat-sealing the constituent fibers of the nonwoven fabric. It may be arranged intermittently or may be arranged by a continuous line such as a straight line, a wavy line, or a curve. In the napkin 1, as shown in FIG. 1, the recesses 7 are formed in a plurality of continuous lines, have an angle with respect to each of the vertical direction X and the horizontal direction Y, and the continuous lines of the recesses 7 intersect each other. Thus, the top sheet 2 is partitioned into a plurality of recessed partition regions ET that are non-recessed portions. In other words, the recessed portions 7 formed in a plurality of continuous lines intersect with each other to form a plurality of non-recessed recessed regions ET surrounded by the recessed portions 7.

  From the viewpoint of prevention of liquid flow, the area of the recessed partition region ET is preferably 60% or more, more preferably 70% or more, and more preferably 80% or more with respect to the surface area of the topsheet 2. Is particularly preferably 99% or less, more preferably 95% or less, particularly preferably 90% or less, specifically 60% or more and 99% or less. Preferably, it is 70% or more and 95% or less, more preferably 80% or more and 90% or less.

  In the napkin 1, the continuous line recesses 7 having an angle with respect to the vertical direction X and the horizontal direction Y are preferably parallel to each other and a plurality of first recesses 71 arranged in parallel with each other at a predetermined interval. As shown in FIG. 3, the first recess 71 and the second recess 72 intersect each other at an angle α. More preferably, in the napkin 1, the groove width W1 of the first recess 71 (see FIG. 3) and the groove width of the second recess 72 are the same, and the interval W2 between the adjacent first recesses 71, 71 (see FIG. The interval between the second concave portions 72 and 72 adjacent to each other is also the same.

The groove width W1 of the first recess 71 (the groove width of the second recess 72) (see FIG. 3) is preferably 0.1 mm or more, and preferably 0.5 mm or more from the viewpoint of preventing liquid flow. More preferably, it is preferably 2.0 mm or less, more preferably 1.5 mm or less, specifically preferably 0.1 mm or more and 2.0 mm or less, 0.5 mm or more and 1 More preferably, it is 5 mm or less.
From the same viewpoint, the interval W2 between the first recesses 71, 71 (interval between the second recesses 72, 72) (see FIG. 3) is preferably 1.0 mm or more, and is 5.0 mm or more. More preferably, it is preferably 20 mm or less, more preferably 10 mm or less, specifically preferably 1.0 mm or more and 20 mm or less, and 5.0 mm or more and 10 mm or less. More preferably.
Furthermore, from the same viewpoint, the angle (angle α) formed by the first recess 71 and the second recess 72 (see FIG. 3) is preferably 30 ° or more, more preferably 40 ° or more, And it is preferably 120 ° or less, more preferably 90 ° or less, specifically, preferably 30 ° or more and 120 ° or less, and more preferably 40 ° or more and 90 ° or less. .

  The plurality of continuous line recesses 7 in the topsheet 2 that is the fiber sheet of the first embodiment are, for example, a device including an ultrasonic horn 201 and a pattern roller 202 shown in FIG. 5 or a heat including a heat seal roller. It can be formed using a sealing device. The pattern roller 202 is of a metallic cylindrical shape such as an aluminum alloy or steel that extends in the lateral direction Y of the top sheet 2, and corresponds to the concave portion 7 of the continuous line of the top sheet 2 to be manufactured on its peripheral surface. Convex portion 700 is provided. The convex portion 700 has a first convex portion 701 corresponding to the first concave portion 71 of the continuous line concave portion 7 and a second convex portion 702 corresponding to the second concave portion 72 of the continuous line concave portion 7. The pattern roller 202 rotates when a driving force from a driving means (not shown) is transmitted using a gear (not shown), and the raw material of the surface sheet 2 is moved between the ultrasonic horn 201 and the pattern roller 202. The convex portion 700 (the first convex portion 701 and the second convex portion 702) formed on the peripheral surface of the pattern roller 202 and the continuous concave portion 7 (the first concave portion 71 and the second concave portion). 72) can be formed on the topsheet 2. Here, the original fabric of the surface sheet 2 means the original nonwoven fabric of the fiber sheet of the first embodiment.

  Moreover, the fiber sheet of 1st Embodiment is provided with the some agent arrangement | positioning part 6 formed by coating an agent. That is, the plurality of agent arrangement portions 6 are formed by applying the agent to the fiber sheet. The agent placement part 6 has a recess upper agent placement part 61 disposed in the recess 7 and a non-recess upper agent placement part 62 disposed in the recess partition region ET that is a non-recess except for the recess 7. In the napkin 1 that uses the fiber sheet as the top sheet 2, as shown in FIGS. 3 and 4, a plurality of recess upper agent arrangement portions 61 are arranged in the first recess 71 and the second recess 72, and the recess section is a non-recess. A plurality of non-recessed upper drug arranging portions 62 are arranged in the region ET. The recess upper agent arrangement portion 61 is an agent arrangement portion arranged within the range of the recess 7 (the first recess 71 and the second recess 72). In the topsheet 2 of the napkin 1, the first recess 71 and the second recess are arranged. A plurality of parts are intermittently arranged on the recess 72. In addition, the non-recessed upper agent arranging portion 62 is an agent arranging portion arranged within the range of the recessed section area ET, and in the surface sheet 2 of the napkin 1, a plurality of non-concave upper agent arranging sections 62 are intermittently disposed on the recessed section area ET. Yes.

  Moreover, the fiber sheet of the first embodiment is formed such that the maximum diameter of the concave suppository placement part 61 is larger than the maximum diameter of the non-concave suppository placement part 62. The shape of the recess upper agent placement portion 61 is not particularly limited as long as it is intermittently disposed on the recess 7, for example, a plurality of intermittently disposed shapes such as an elliptical shape and an oval shape, As shown in FIG. 3, the napkin 1 is arranged in a plurality of elliptical shapes. Further, the shape of the non-recessed upper drug placement portion 62 is not particularly limited as long as it is intermittently disposed on the recessed portion partition region ET. For example, a plurality of non-recessed drug placement portions 62 are intermittently disposed in a circular shape, a polygonal shape, or the like. In the napkin 1, a plurality of circular shapes are arranged as shown in FIG. In the napkin 1, the maximum diameter of the oval-shaped concave suppository arrangement part 61 is formed larger than the maximum diameter of the circular non-concave suppository arrangement part 62.

The maximum diameter D1 (refer to FIG. 3) of the recess upper agent arranging portion 61 is preferably 0.1 mm or more, and more preferably 0.5 mm or more, from the viewpoint of preventing liquid flow and improving dry feeling. And it is preferably 300 mm or less, more preferably 200 mm or less, specifically preferably 0.1 mm or more and 300 mm or less, more preferably 0.5 mm or more and 200 mm or less.
Further, from the same viewpoint, the maximum diameter D2 (see FIG. 3) of the non-concave upper drug placement portion 62 is preferably 0.1 mm or more, more preferably 0.5 mm or more, and 6. It is preferably 0 mm or less, more preferably 3.0 mm or less, specifically preferably 0.1 mm or more and 6.0 mm or less, and more preferably 0.5 mm or more and 3.0 mm or less. Further preferred.

  The coating of the agent that forms the agent placement portion 6 (the recessed portion upper placement portion 61 and the non-recessed portion placement portion 62) is not particularly limited, but for example, inkjet printing, flexographic printing, gravure printing, screen printing, spraying, Coating can be performed by a method such as brush application, and in particular, coating by an ink jet printing method is preferable from the viewpoint of suppressing unevenness and coating.

  The top sheet 2 which is the fiber sheet of the first embodiment in which the maximum diameter of the concave suppository placement part 61 is larger than the maximum diameter of the non-concave suppository placement part 62 is compared with the original fabric of the fiber sheet having a plurality of concave parts Then, an agent having a viscosity of 1 cps or more and 200 cps or less in a temperature range of 20 ° C. or more and 80 ° C. or less is applied to the raw fabric of the fiber sheet by using, for example, an ink jet method to form a plurality of agent arrangement portions 6. The maximum diameter of the agent placement portion 6 (recess upper agent placement portion 61) applied to the recess 7 (the first recess 71 and the second recess 72) is applied to the recess partition region ET that is a non-recess except for the recess 7. It is made larger than the maximum diameter of the worked agent placement part 6 (non-recessed upper agent placement part 62). Preferably, the agent is uniformly applied to the original fiber sheet using, for example, an inkjet method. If the agent applied in this way is applied onto the recesses 7 (the first recess 71 and the second recess 72), the fibers constituting the fiber sheet in the recess 7 become dense. Therefore, it becomes the recessed part upper agent arrangement | positioning part 61 expanded in the recessed part 7 by capillary action. Moreover, if the coated agent is coated on the recessed section area ET that becomes a non-recessed portion, it becomes the non-recessed upper agent arranging portion 62 as it is. In this manner, the topsheet 2 that is the fiber sheet of the first embodiment in which the maximum diameter of the concave suppository placement part 61 is larger than the maximum diameter of the non-concave suppository placement part 62 can be manufactured.

  From the above viewpoint, the inter-fiber distance of the fibers constituting the recesses 7 is preferably 1.0 μm or more, more preferably 10 μm or more, and preferably 50 μm or less, and 35 μm or less. More specifically, it is preferably 1.0 μm or more and 50 μm or less, and more preferably 10 μm or more and 35 μm or less. Further, the inter-fiber distance of the fibers constituting the recessed partition region ET that is a non-recessed portion is preferably 50 μm or more, more preferably 60 μm or more, and preferably 200 μm or less, and 150 μm or less. More preferably, it is preferably 50 μm or more and 200 μm or less, and more preferably 60 μm or more and 150 μm or less. The interfiber distance can be calculated by the method described in JP 2010-158488 A.

From the viewpoint of further increasing the maximum diameter of the concave top adhesive placement portion 61 than the maximum diameter of the non-recess top adhesive placement portion 62, the viscosity of the agent in the temperature range of 20 ° C. or higher and 80 ° C. or lower is 0.1 cps or higher. It is preferably 10 cps or more, more preferably 200 cps or less, further preferably 150 cps or less, and specifically 0.1 cps or more and 200 cps or less, More preferably, it is 10 cps or more and 150 cps or less.
Further, from the viewpoint of further increasing the maximum diameter of the concave suppository placement part 61 to be larger than the maximum diameter of the non-concave suppository placement part 62, the concave part 7 (first concave part 71 and second concave part 72), for example, using an inkjet method. The coating basis weight of the agent that forms the agent placement portion 6 (recessed portion placement portion 61) is formed on the recessed portion partitioning area ET that is a non-recessed portion, and the agent placement portion 6 (non-recessed portion placement portion 62) is formed. It is preferable to make it larger than the coating basis weight of the agent.
The coating basis weight of the agent that forms the agent placement portion 6 (non-recess upper agent placement portion 62) in the recessed section area ET that becomes a non-recessed portion is the basis weight of the nonwoven fabric from the viewpoint of preventing liquid flow and improving dry feeling. The amount is preferably 0.1 wt% or more, more preferably 0.3 wt% or more, and preferably 10.0 wt% or less, more preferably 3.0 wt% or less. Specifically, it is preferably 0.1 wt% or more and 10.0 wt% or less, and more preferably 0.3 wt% or more and 3.0 wt% or less.
From the same viewpoint, the coating basis weight of the agent that forms the agent placement portion 6 (recess upper agent placement portion 61) in the recess 7 (first recess 71 and second recess 72) is the basis weight of the nonwoven fabric. It is preferably 0.3 wt% or more, more preferably 0.6 wt% or more, and preferably 15.0 wt% or less, more preferably 10.0 wt% or less, Specifically, it is preferably 0.3 wt% or more and 15.0 wt% or less, and more preferably 0.6 wt% or more and 10.0 wt% or less.

  Moreover, when using as the surface sheet 2 of the napkin 1, the recessed part top arrangement | positioning part 61 of the fiber sheet of 1st Embodiment tends to transfer a bodily fluid to the absorber 4 of the non-skin opposing surface side of the surface sheet 2. From the viewpoint, it is preferable that the hydrophilicity on the skin facing surface side and the hydrophilicity on the non-skin facing surface side are the same. Similarly, regarding the non-concave upper drug placement portion 62, the hydrophilicity on the skin facing surface side and the hydrophilicity on the non-skin facing surface side are preferably the same. Thus, in order to make the hydrophilicity of the skin facing surface side and the hydrophilicity of the non-skin facing surface side of the agent placement portion 6 (the recessed portion upper placement portion 61 and the non-recessed portion placement portion 62) the same, for example, The agent can be manufactured by, for example, applying the agent to the original fabric of the fiber sheet by using an ink jet method, and simultaneously sucking the agent from the surface opposite to the surface on which the agent is applied using a suction device. .

  Whether the hydrophilicity on the skin facing surface side and the hydrophilicity on the non-skin facing surface side of the agent placement portion 6 (the recessed portion upper placement portion 61 and the non-recessed portion placement portion 62) is the same, for example, the surface With respect to the skin facing surface and the non-skin facing surface when water droplets are dropped on the skin facing surface and the non-skin facing surface of the agent placing portion 6 (the recessed portion upper agent placing portion 61 and the non-recessed upper agent placing portion 62) of the sheet 2, respectively. It can be confirmed by various known methods such as a method for measuring the contact angle of water droplets and a method for measuring the absorption rate.

  As described above, since the topsheet 2 that is the fiber sheet of the first embodiment is formed of a hydrophobic nonwoven fabric, the agent placement portion 6 (the recessed portion upper agent placement portion 61 and the non-recessed portion upper agent placement portion 62). The napkin 1 is preferably formed by coating the agent having a hydrophilic group from the viewpoint of preventing body fluid from remaining on the top sheet 2 and preventing leakage due to liquid flow.

As the agent having a hydrophilic group that forms the agent placement portion 6 (the recessed portion adhesive placement portion 61 and the non-recessed portion placement portion 62), various known ones can be used without particular limitation. The oil agent which has is used. As the oil agent having a hydrophilic group, an anionic, cationic, amphoteric or nonionic surfactant can be used. Examples of anionic surfactants include alkyl phosphate sodium salt, alkyl ether phosphate sodium salt, dialkyl phosphate sodium salt, dialkyl sulfosuccinate sodium salt, alkylbenzene sulfonate sodium salt, alkyl sulfonate sodium salt, alkyl sulfate sodium salt, secondary Examples include alkyl sulfate sodium salt (all alkyls preferably have 6 to 22 carbon atoms, particularly preferably 8 to 22 carbon atoms). These may use other alkali metal salts such as potassium salts in place of sodium salts. Examples of the cationic surfactant include alkyl (or alkenyl) trimethyl ammonium halide, dialkyl (or alkenyl) dimethyl ammonium halide, alkyl (or alkenyl) pyridinium halide, and these compounds have 6 or more carbon atoms. Those having 18 or less alkyl groups or alkenyl groups are preferred. Examples of the halogen in the halide compound include chlorine and bromine. Examples of the zwitterionic surfactant include alkyl (C1-30) dimethylbetaine, alkyl (C1-30) amidoalkyl (C1-4) dimethylbetaine, alkyl (C1-30). ) Betaine-type zwitterionic surfactants such as dihydroxyalkyl (1-30 carbon atoms) betaine, sulfobetaine-type amphoteric surfactants, alanine [alkyl (1-30 carbon atoms) aminopropionic acid type, alkyl ( Amino acid type amphoteric surfactants such as amphoteric surfactants, glycine types such as alkylbetaines [alkyl (carbon number 1 to 30) aminoacetic acid type etc.] amphoteric surfactants, etc. And aminosulfonic acid type amphoteric surfactants such as alkyl (having 1 to 30 carbon atoms) taurine type. Examples of nonionic surfactants include polyhydric alcohol fatty acid esters such as glycerin fatty acid ester, poly (preferably n = 2 to 10) glycerin fatty acid ester, sorbitan fatty acid ester (all preferably 8 to 8 carbon atoms of fatty acid). 60), polyoxyalkylene (addition mole number 2-20) alkyl (carbon number 8-22) amide, polyoxyalkylene (addition mole number 2-20) alkyl (carbon number 8-22) ether, polyoxyalkylene-modified silicone And amino-modified silicone. Furthermore, it is possible to apply an oil-soluble substance. For example, liquid paraffin, fatty acid, fatty acid ester, polypropylene glycol, polybutylene glycol, vegetable oil, animal oil, fish oil, Long chain (greater than C4) alkyl alcohol, dialkyl (C2 to C30) glycerol, dialkyl (C2 to C30) ester or trialkyl (C2 to C30) ester of pentaerythritol, oil-soluble polyoxyalkylene (C2 to C4) modification Examples include silicone, dialkyl (C2 to C4) silicone amino-modified silicone, fluorine oil, fluorine-based surfactant, fluorine-modified silicone. In particular, the alkyl phosphate potassium salt of an anionic surfactant and the zwitterionic alkyl betaine are preferable from the viewpoint of improving the fluid flow preventing property and dryness of the body fluid in a well-balanced manner. The above surfactant and oil-soluble substance may be used alone, or may be mixed and used as an emulsion.

  In the fiber sheet of the first embodiment, as described above, the agent placement portion 6 (the recessed portion upper placement portion 61 and the non-recessed portion placement portion 62) is formed by coating the agent, but the final product For example, it is determined as follows whether or not the agent arrangement portion 6 (the concave upper agent arrangement portion 61 and the non-recess upper agent arrangement portion 62) of the napkin 1 is coated and formed.

<Judgment whether the agent arrangement | positioning part 6 is coated and formed>
Whether or not the agent placement portion 6 is formed by coating depends on the surface tension of the portion of the agent placement portion 6 that seems to have been formed by coating the agent, and the portion excluding the agent placement portion 6 in the topsheet 2 Judgment is made based on whether or not the difference in surface tension at 10 is 10 dyn / cm or more. Specifically, the agent placement unit 6 which is a part of the surface sheet placed horizontally using various wet tension test mixed liquids (manufactured by Wako Pure Chemical Industries, Ltd.) having known surface tensions and different values. On the top, 0.5 μL is dropped at a pitch where adjacent droplets do not overlap using a multichannel micropipette. Then, it is observed whether it becomes a spherical droplet immediately after dripping, or it penetrates into a portion of the topsheet, and a liquid mixture for wetting tension test that penetrates into a portion of the topsheet immediately after dripping (Wako Pure Chemical Industries, Ltd.) Select the product). And the surface tension of the selected liquid mixture for wet tension test (made by Wako Pure Chemical Industries Ltd.) is calculated | required as the surface tension of the agent arrangement | positioning part 6 of the said surface sheet. Similarly, the surface tension of the portion excluding the agent placement portion 6 in the horizontally placed surface sheet 2 is obtained. If the difference between the surface tension of the agent placement portion 6 of the surface sheet obtained as described above and the surface tension of the portion excluding the agent placement portion 6 in the surface sheet 2 is 10 dyn / cm or more, the surface sheet 2 It is determined that the agent placement portion 6 is formed by coating the agent.

  The surface sheet 2 which is the fiber sheet of the first embodiment described above is formed by applying a plurality of recesses 7 (first recesses 71 and second recesses 72) and an agent, as shown in FIGS. And a plurality of agent placement portions 6. And the agent arrangement | positioning part 6 is the non-recessed area | region ET which is arrange | positioned at the recessed part top agent arrangement | positioning part 61 distribute | arranged to the recessed part 7 (the 1st recessed part 71 and the 2nd recessed part 72), and the non-recessed part except the recessed part 7. And a concave upper agent arrangement portion 62. And the maximum diameter of the recessed part upper agent arrangement | positioning part 61 distribute | arranged to the recessed part 7 (1st recessed part 71 and the 2nd recessed part 72) where a bodily fluid tends to gather is formed larger than the maximum diameter of the non-recessed upper agent arrangement | positioning part 62. Yes. Therefore, the effect of the added agent is higher in the recess 7 (the first recess 71 and the second recess 72) than in the recess partition region ET. For example, if the added agent is an agent having a hydrophilic group, the agent has an effect of improving the familiarity with the body fluid. The groove-like recesses 7 (first recesses 71 and second recesses 72) are easy to collect body fluid after excretion due to capillary action, and through the recesses 7 (first recesses 71 and second recesses 72) that are highly effective for the agent. Thus, it becomes easier to move the body fluid from the top sheet 2 to the absorber 4. On the other hand, the maximum diameter of the plurality of non-recessed adhesive placement portions 62 arranged in the recessed section area ET is formed to be smaller than the maximum diameter of the recessed portion adhesive placement portion 61. Therefore, the effect of the added agent is lower in the recessed section area ET than in the recessed section 7 (the first recessed section 71 and the second recessed section 72). For example, if the added agent is an agent having a hydrophilic group, the entire surface of the recessed section area ET is unlikely to get wet with body fluid, and the body fluid is recessed by arranging a plurality of the non-recessed upper agent placement sections 62 in the recessed section area ET. It becomes difficult to flow in the plane direction in the partition area ET. The strength of the effect of the agent added in this way can be prevented from flowing through the surface sheet and the body fluid from remaining on the surface sheet 2, and the liquid flow preventing property and dryness can be improved. The top sheet 2 is obtained.

  Moreover, as shown in FIG.1 and FIG.3, the surface sheet 2 which is the fiber sheet of 1st Embodiment mentioned above cross | intersects the recessed part 7 formed in the several continuous line mutually, and the circumference | surroundings are enclosed by the recessed part 7 A plurality of non-recessed recessed section areas ET are formed. Therefore, it is difficult for the body fluid to move in the plane direction of the top sheet 2, and it is easy to control the fluidity in the surface direction of the body fluid. In particular, in the napkin 1, the top sheet 2 is formed of a hydrophobic non-woven fabric, and the agent placement portion 6 (the recessed upper agent placement portion 61 and the non-recessed upper agent placement portion 62) is coated with the agent having a hydrophilic group. Therefore, the above-described effect is further achieved.

  Next, the surface sheet 2 which is the fiber sheet of 2nd Embodiment of this invention is demonstrated. The surface sheet 2 which is the fiber sheet of the second embodiment is the same as that of the first embodiment in the form of the recess upper agent placement portion 61 arranged in the first recess 71 and the second recess 72 in the agent placement portion 6. It differs from the surface sheet 2 which is a fiber sheet. About the surface sheet 2 which is the fiber sheet of 2nd Embodiment, it demonstrates mainly about a different point from the surface sheet 2 which is the fiber sheet of 1st Embodiment, attaches | subjects the same code | symbol about the same point, and abbreviate | omits description. To do. About the point which does not mention especially, the description regarding the surface sheet 2 which is a fiber sheet of 1st Embodiment is applied suitably. Moreover, about the effect of the surface sheet 2 which is the fiber sheet of 2nd Embodiment, a different point from the effect of the surface sheet 2 which is the fiber sheet of 1st Embodiment is demonstrated, and the point which is not demonstrated in particular is 1st Embodiment. The effect of the surface sheet 2 that is the fiber sheet of the first embodiment is the same as the effect of the surface sheet 2 that is the fiber sheet of the first embodiment.

  In the surface sheet 2 that is the fiber sheet of the second embodiment, as in the surface sheet 2 that is the fiber sheet of the first embodiment, the continuous line recesses 7 are parallel to each other as shown in FIGS. And a large number of first recesses 71 arranged at predetermined intervals, and a large number of second recesses 72 formed in parallel with each other at a predetermined interval. In addition, a plurality of non-recessed upper agent placement portions 62 included in the agent placement portion 6 are intermittently arranged in a circular shape on the recessed section area ET. And in the surface sheet 2 which is the fiber sheet of 2nd Embodiment, the recessed part top agent arrangement | positioning part 61 distribute | arranged to the recessed part 7 which the agent arrangement | positioning part 6 has is the recessed part 7 (1st recessed part 71 and 2nd recessed part 72). Are formed in a continuous line.

  In the surface sheet 2 that is the fiber sheet of the second embodiment, the concave part upper agent arrangement part 61 is formed in a plurality of continuous lines by applying the agent. The continuous lines of the respective concave suppository placement parts 61 have an angle with respect to the vertical direction X and the horizontal direction Y, and the continuous lines of the plurality of concave suppository placement parts 61 intersect each other to define a plurality of partitioned regions DT. It is partitioned. In other words, the continuous lines of the plurality of concave adhesive agent placement portions 61 intersect each other to form a plurality of partitioned regions DT surrounded by the continuous lines of the concave adhesive agent placement portions 61. Preferably, as shown in FIGS. 8 and 9, the first recess upper agent is placed on the groove of the first recess 71 so that the positions of the continuous line of the recess 7 and the continuous line of the recess upper agent arranging portion 61 coincide with each other. An arrangement portion 61 a is arranged, and a second recess upper agent arrangement portion 61 b is arranged on the groove of the second recess 72. And the continuous line of the 1st recessed part top agent arrangement | positioning part 61a and the continuous line of the 2nd recessed part top agent arrangement | positioning part 61b mutually cross, and the several division area | region enclosed by the continuous line of this recessed part top agent arrangement | positioning part 61 DT is formed. The area of the partition region DT is preferably the same as the area of the recessed partition region ET. As described above, the concave suppository arrangement portion 61 is formed in a continuous line so as to coincide with the concave portion 7 (the first concave portion 71 and the second concave portion 72). It is formed larger than the maximum diameter of the upper agent arranging portion 62.

  As shown in FIGS. 6 and 8, the topsheet 2 that is the fiber sheet of the second embodiment described above is provided with a continuous line of the first recess upper agent placement portion 61 a on the groove of the first recess 71, and the second On the groove of the recess 72, a continuous line of the second recess upper agent arrangement portion 61b is arranged. Therefore, the body fluid after excretion that is groove-shaped and collected in the concave portion 7 (first concave portion 71 and second concave portion 72) by capillarity passes through the concave upper agent arrangement portion 61 where the effect of the agent is high, The body fluid is further easily moved from the top sheet 2 to the absorber 4.

  The fiber sheet of the present invention is not limited to the top sheet 2 for absorbent articles that is the fiber sheet of the first to second embodiments described above, and can be changed as appropriate. Moreover, each component in the surface sheet 2 which is the fiber sheet of the above-mentioned 1st-2nd embodiment can be implemented in combination suitably in the range which does not impair the meaning of this invention. Moreover, each component in the fiber sheet of other embodiment shown below can also be implemented suitably combining in the range which does not impair the meaning of this invention.

  For example, a plurality of non-woven fabrics are laminated, and the concave portions 7 for heat-sealing the non-woven fabrics to be combined and integrated are arranged in a plurality of continuous lines to form the concave section regions ET, The non-woven fabric may be unevenly shaped. Then, a cleaning component containing abrasive particles is applied to the surface of the laminated nonwoven fabric by, for example, an ink jet printing method, and the maximum diameter of the concave adhesive agent placement portion 61 on the concave portion 7 is set as a non-recessed concave section. The fiber sheet may be formed with a diameter larger than the maximum diameter of the non-concave upper drug placement portion 62 on the region ET. The fiber sheet manufactured in this way can be used as a cleaner sheet for removing accumulated dirt accumulated in a kitchen sink or the like.

  Examples of the abrasive particles contained in the cleaner sheet for removing the accumulated dirt include silicon carbide, zirconium oxide, aluminum oxide, cerium oxide, chromium oxide, calcium carbonate, zeolite, and silica (silica powder). The abrasive particles preferably have an average particle size of 5 μm or more, particularly 10 μm or more. Moreover, various surfactants etc. can be used as said washing | cleaning component, For example, surfactant mentioned above is mentioned.

  If the fiber sheet as described above is used as a cleaner sheet for removing the accumulated dirt, the recessed upper agent placement part 61 is more effective than the non-recessed adhesive placement part 62. For example, it is possible to selectively use, for example, the concave top adhesive placement portion 61 in a portion where the accumulated dirt is severe and the non-concave top placement portion 62 in a portion where the dirt is not so severe. Thus, the strength of the effect of the added agent can be applied to one sheet, and a convenient cleaner sheet is obtained.

  Also, by laminating a plurality of nonwoven fabrics, the concave portions 7 for heat-sealing the nonwoven fabrics to form a composite / integrated portion are formed in a plurality of wavy continuous lines, and the original nonwoven fabric of the fiber sheet is shaped unevenly. May be. And the washing | cleaning component containing the dusting agent which can improve the collection property using adsorption | suction of garbage on the surface of this nonwoven fabric is applied, for example by an inkjet printing system, The recessed part top agent arrangement | positioning part on the recessed part 7 The fiber sheet may be formed by making the maximum diameter of 61 larger than the maximum diameter of the non-recessed upper drug placement portion 62 on the recessed section area ET that becomes a non-recessed portion. The fiber sheet manufactured in this way can be used as a cleaning sheet that adsorbs dust and hair on the floor.

  Examples of the cleaning component containing the dusting agent include various oil agent components. Examples of the oil component include oil agents such as mineral oil, synthetic oil, and silicone oil, and those obtained by mixing a surfactant, a solvent, an antioxidant, a fragrance, and the like with the oil component.

  If the fiber sheet as described above is used as a cleaning sheet, the effect of the cleaning component added to the recessed portion adhesive placement portion 61 is higher than that of the non-recessed portion placement portion 62. Dust and hair can be adsorbed by the upper agent arranging portion 61, and excess cleaning components can be wiped off by the non-recessed upper agent arranging portion 62, and adhesion of the cleaning components to the floor or the like can be reduced. Thus, the strength of the effect of the added agent can be applied to one sheet, and a convenient cleaning sheet is obtained.

  Moreover, you may intermittently give the recessed part 7 for heat-bonding and integrating the constituent fibers of the original nonwoven fabric of a fiber sheet. Then, on the surface of the nonwoven fabric, a cosmetic agent capable of enhancing the cleanliness of the body is applied by, for example, a flexographic printing method, and the maximum diameter of the concave part upper agent arrangement part 61 on the concave part 7 is a concave part that becomes a non-concave part. The fiber sheet may be formed with a larger diameter than the maximum diameter of the non-recessed upper drug placement portion 62 on the partition region ET. The fiber sheet produced in this way can be used as a body cleaning sheet, specifically as a towel, a makeup remover sheet, a body cleaning sheet, a baby wipe, and a care wiper.

  As the cosmetic agent, those containing a physiologically effective moisturizing component as a main component and containing an anti-inflammatory agent, a whitening agent, a UV care agent, a bactericidal agent, an antiperspirant, a refreshing agent, a fragrance and the like can be used. .

  If the fiber sheet as described above is used as a body cleaning sheet, the effect of the cleaning component added to the recessed upper agent placement part 61 is higher than that of the non-recessed adhesive placement part 62, for example, The concave suppository arrangement part 61 can adsorb dirt on the body, and the non-concave suppository arrangement part 62 can wipe off excess cleaning components, thereby reducing the sticky feeling of the skin. Thus, the strength of the effect of the added agent can be applied to one sheet, and it becomes a convenient body cleaning sheet.

  Moreover, you may give intermittently the recessed part 7 for heat-sealing and integrating these ultrafine fibers using the ultrafine fiber for the constituent fiber of the original nonwoven fabric of a fiber sheet. Then, on the surface of the nonwoven fabric, a cleaning agent capable of improving the cleanliness of fingerprint stain is applied by, for example, a flexographic printing method, so that the maximum diameter of the recess upper agent placement portion 61 on the recess 7 becomes a non-recess. The fiber sheet may be formed with a larger diameter than the maximum diameter of the non-recessed upper agent arranging portion 62 on the recessed section area ET. The fiber sheet manufactured in this way can be used as a cleaning sheet, specifically as an electronic device or a panel cleaning wiper.

  As the cleaning agent, an alcohol such as ethanol or isopropanol or a saturated and unsaturated hydrocarbon having 6 to 22 carbon atoms added with an anionic, cationic, amphoteric or nonionic surfactant can be used. Examples of the surfactant include the surfactants described above.

  If the fiber sheet as described above is used as an electronic device or a panel cleaning wiper, the effect of the cleaning component added to the recessed upper agent placement portion 61 is higher than that of the non-recessed adhesive placement portion 62. For example, it is possible to clean a heavily soiled portion with the recess upper agent arranging portion 61 and to wipe away a portion with less dirt and an excessive cleaning component with the non-recessed adhesive agent arranging portion 62, and it is difficult to remain after wiping. Become. Thus, the strength of the effect of the added agent can be applied to one sheet, and a convenient cleaning sheet is obtained.

  Moreover, as shown in FIG.6 and FIG.8, as for the surface sheet 2 which is the fiber sheet of 2nd Embodiment mentioned above, the 1st recessed part 71 which is a continuous line of the recessed part 7 is parallel to each other, and the skin | spacing at a predetermined space | interval. The continuous line of the 1st recessed part top agent arrangement | positioning part 61a is distribute | arranged to the opposing surface whole surface, and on the groove | channel of this 1st recessed part 71. FIG. In addition, second concave portions 72 that are continuous lines of the concave portions 7 are arranged on the entire skin-facing surface in parallel with each other at a predetermined interval, and the continuous lines of the second concave portion upper agent arranging portion 61b are formed on the grooves of the second concave portions 72. Is arranged. That is, the concave top adhesive placement portion 61 having the first concave top adhesive placement portion 61a and the second concave top adhesive placement portion 61b is disposed on the entire skin-facing surface, but is opposed to the wearer's excretion portion when worn. What is necessary is just to be distribute | arranged at least to the excretion part opposing part.

  Moreover, although the surface sheet 2 which is the fiber sheet of 1st Embodiment and 2nd Embodiment mentioned above is applied to the sanitary napkin 1, other absorbent articles, for example, a panty liner, an incontinence pad, or a disposable diaper Etc. may be applied.

  Moreover, although the surface sheet 2 which is the fiber sheet of 1st Embodiment and 2nd Embodiment mentioned above apply | coats the agent which has a hydrophilic group to a hydrophobic nonwoven fabric, the several agent arrangement | positioning part 6 is formed. Alternatively, a plurality of agent arrangement portions 6 may be formed by applying a hydrophobic group agent to a hydrophobic nonwoven fabric. Moreover, you may form the some agent arrangement | positioning part 6 by applying the agent which consists of a hydrophobic group or the agent which has a hydrophilic group to a hydrophilic nonwoven fabric. Here, as the agent comprising a hydrophobic group, a silicone resin, a fluorine resin, a skin care agent, a hot melt adhesive, or the like can be used. Even if it is such a form, since the surface sheet 2 has the agent arrangement | positioning part 6, while being easy to control the liquid flow property of the surface direction of a bodily fluid, it is easy to control a liquid residual property.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

[Example 1]
Prepare a commercially available sanitary napkin (Kao Corporation, trade name “Laurie Skin Cleanguard, No ordinary wings”, 2015), soak the sanitary napkin in an organic solvent and dissolve the adhesive. Take out the sheet, hand wash with tap water for 10 minutes, and then wash with ethanol for 30 minutes x 3 times with an ultrasonic cleaner, let it air dry, and then apply a hydrophilic group agent using a nylon paintbrush. 6 and FIG. 8, the concave top adhesive placement portion 61 and the non-recess top adhesive placement portion 62 were produced. As the agent having a hydrophilic group, Anhitol 86B (trade name) manufactured by Kao Corporation was used. The maximum diameter D1 (refer to FIG. 8) of the concave portion adhesive arrangement part 61 is 130 mm (continuous line), and the maximum diameter D2 (see FIG. 8) of the non-concave upper agent arrangement part 62 is 1.86 mm. An agent having a hydrophilic group with respect to the amount was applied in an amount of 0.9 wt%. As described above, a sanitary napkin using the fiber sheet of Example 1 in which the maximum diameter of the concave suppository placement part 61 is formed larger than the maximum diameter of the non-concave suppository placement part 62 as the top sheet is produced. did.

[Example 2]
The agent having a hydrophilic group used at the time of producing the fiber sheet of Example 1 was changed to Anholex MP-2K (trade name) manufactured by Miyoshi Oil & Fats Co., Ltd. 0 wt% coating was applied. Other than that was carried out similarly to the surface sheet which is a fiber sheet of Example 1, and produced the sanitary napkin which used the fiber sheet of Example 2 for the surface sheet.

Example 3
The agent having a hydrophilic group used in producing the fiber sheet of Example 1 was changed to KF-6015 (trade name) manufactured by Shin-Etsu Chemical Co., Ltd., and the hydrophilic agent was 1.1 wt. % Coating. Other than that was carried out similarly to the surface sheet which is a fiber sheet of Example 1, and produced the sanitary napkin which used the fiber sheet of Example 3 for the surface sheet.

[Comparative Example 1]
The agent having a hydrophilic group used at the time of producing the fiber sheet of Example 1 was 1.1 wt% with respect to the basis weight of the nonwoven fabric, and the recess upper agent placement portion 61 and the non-recess upper agent in the form shown in FIGS. Coating was carried out by changing the maximum diameter of the arrangement part 62 so that both would be 1.86 mm. Other than that was carried out similarly to the surface sheet which is a fiber sheet of Example 1, and produced the sanitary napkin which used the fiber sheet of the comparative example 1 for the surface sheet.

[Comparative Example 2]
The agent having a hydrophilic group used at the time of producing the top sheet of Example 2 was applied at 1.0 wt% with respect to the basis weight of the nonwoven fabric. Other than that was carried out similarly to the surface sheet which is a fiber sheet of the comparative example 1, and produced the sanitary napkin which used the fiber sheet of the comparative example 2 for the surface sheet.

[Comparative Example 3]
The agent having a hydrophilic group used at the time of producing the top sheet of Example 3 was applied at 1.2 wt% with respect to the basis weight of the nonwoven fabric. Other than that was carried out similarly to the surface sheet which is a fiber sheet of the comparative example 1, and produced the sanitary napkin which used the fiber sheet of the comparative example 3 for the surface sheet.

[Comparative Example 4]
The agent having a hydrophilic group used in the preparation of the top sheet of Example 1 was applied to the entire surface of the skin facing surface with respect to the basis weight of the nonwoven fabric, and the fiber sheet of Comparative Example 4 was applied to the top sheet. The sanitary napkin used for the preparation was prepared.

[Comparative Example 5]
The agent having a hydrophilic group used in the preparation of the surface sheet of Example 2 was applied to the entire surface of the skin facing surface with respect to the basis weight of the nonwoven fabric, and the fiber sheet of Comparative Example 5 was applied to the surface sheet. The sanitary napkin used for the preparation was prepared.

[Comparative Example 6]
The agent having a hydrophilic group used in the preparation of the top sheet of Example 1 was applied to the entire surface of the skin facing surface with respect to the basis weight of the nonwoven fabric, and the fiber sheet of Comparative Example 6 was used as the top sheet. The sanitary napkin used for the preparation was prepared.

[Evaluation]
About sanitary napkins used for the fiber sheet surface sheets of Examples 1 to 3 and Comparative Examples 1 to 6, as the evaluation of the liquid flow prevention property and the dryness, the surface liquid remaining amount and the surface liquid flow distance are respectively measured by the following methods. It was measured. The results are shown in Table 1 below.

[Surface liquid remaining amount]
The surface liquid return amount indicates how much the liquid absorbed by the absorber returns to the surface (surface sheet) side by pressurization. The smaller the amount, the higher the liquid retention of the absorbent body and the easier it is to obtain a dry feeling when worn.
Place the sanitary napkin horizontally with the top sheet facing upward, and place an acrylic plate with a 1 cm diameter injection port on the bottom, overlapping the excretion part of the napkin (position 40 mm from the front end in the longitudinal direction of the napkin) 3 g of defibrinated horse blood (manufactured by Nippon Biotest Laboratories Co., Ltd.), whose viscosity was adjusted to 8.0 ± 0.1 cP, was injected from the injection port, and the state was maintained for 3 minutes after the injection. Next, 3 g of defibrinated horse blood was again injected from the injection port. And after the injection | pouring, after maintaining the state for 1 minute, the acrylic board was removed, the surface sheet was taken out from the napkin, and the weight W2 of this surface sheet was measured. The weight W1 of the top sheet measured before injection was subtracted from the weight W2, and the value was defined as the remaining amount of the surface liquid.

[Surface liquid flow distance]
The sanitary napkin was fixed on a plate inclined at 45 degrees with the top sheet facing upward. 0.5 g of the above-mentioned defibrinated horse blood was dropped at a speed of 0.1 g / sec on the position of the central part (excretion part facing part) of the sanitary napkin, and the defibrinated horse blood flowed down on the top sheet. The distance was measured.

  As is clear from the results shown in Table 1, the sanitary napkin using the fiber sheets of Examples 1 to 3 as the top sheet was used for the sanitary use using the fiber sheets of Comparative Examples 1 to 6 as the top sheet. It was found that both the remaining liquid amount and the liquid flow performance were improved as compared with the napkin. Thus, the strength of the effect of the added agent can be applied to the top sheet 2 that is a single fiber sheet, and a convenient top sheet 2 can be expected.

1 Sanitary napkin (absorbent article)
2 Surface sheet (fiber sheet)
3 Back sheet 4 Absorber 5 Adhesive part 6 Agent placement part 61 Recessed top agent placement part 61a First recessed part top agent placement part 61b Second recessed part top agent placement part 62 Non-recessed top agent placement part 7 Recessed part 71 First recessed part 72 First 2 recess DT partition area ET recess section area

Claims (9)

A fiber sheet comprising a plurality of concave portions and a plurality of agent arrangement portions having an agent, and having a longitudinal direction and a transverse direction,
The agent placement portion has a recess top agent placement portion disposed in the recess, and a non-recess top agent placement portion disposed in a non-recess except for the recess,
A fiber sheet in which the maximum diameter of the concave suppository placement part is larger than the maximum diameter of the non-concave suppository placement part.   The fiber sheet according to claim 1, wherein a plurality of the non-recess upper agent arrangement portions are arranged in the non-recess. The recess is a plurality of continuous lines,
3. The fiber sheet according to claim 1, wherein the concave portion upper agent arranging portion is a continuous line that coincides with the concave portion. The recess is a plurality of continuous lines,
The continuous line of the concave part has an angle with respect to the vertical direction and the horizontal direction, and the continuous lines of the plurality of concave parts intersect with each other to define a plurality of concave part partition regions that are the non-recessed parts. The fiber sheet of any one of -3.   The fiber sheet according to any one of claims 1 to 4, wherein the concave part top placement part has the same hydrophilicity on the skin facing surface side and hydrophilicity on the non-skin facing surface side. An absorbent article comprising a top sheet, a back sheet and an absorbent body positioned between both sheets,
An absorptive article using the fiber sheet according to any one of claims 1 to 5 for the surface sheet.   Viscosity in the temperature range of 20 ° C. or more and 80 ° C. or less is 1 cps or more and 200 cps or less with respect to the original fabric of the fiber sheet in which the constituent fibers are heat-sealed and have a plurality of concave portions with relatively high fiber density. Using an ink jet method, an agent is applied to the original fabric of the fiber sheet to form a plurality of agent placement portions, and the maximum diameter of the agent placement portion applied to the recesses is determined by removing the recesses. The manufacturing method of the fiber sheet made larger than the maximum diameter of this agent arrangement | positioning part apply | coated to the recessed part.   The fiber sheet production according to claim 7, wherein the agent is sucked from a surface opposite to a surface on which the agent is applied at the same time that the agent is applied to the original fabric of the fiber sheet using the ink jet system. Method.   The coating basis weight of the agent that forms the agent placement portion in the concave portion is set to be larger than the coating basis weight of the agent that forms the agent placement portion in the non-recessed portion using the inkjet method. The manufacturing method of the fiber sheet of 7 or 8.

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