JP5129536B2 - Sanitary napkin - Google Patents

Sanitary napkin Download PDF

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JP5129536B2
JP5129536B2 JP2007256391A JP2007256391A JP5129536B2 JP 5129536 B2 JP5129536 B2 JP 5129536B2 JP 2007256391 A JP2007256391 A JP 2007256391A JP 2007256391 A JP2007256391 A JP 2007256391A JP 5129536 B2 JP5129536 B2 JP 5129536B2
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front
rear direction
sanitary napkin
emboss
top sheet
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JP2009082480A (en
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晴子 大土井
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大王製紙株式会社
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Description

  The present invention relates to a sanitary napkin provided with an emboss.

As this type of sanitary napkin, as shown in FIG. 1, a liquid-permeable surface sheet 101 made of a non-woven sheet or the like, an absorbent core 103 made of cotton-like pulp or the like that absorbs bodily fluids such as menstrual blood and vaginal discharge, and polyethylene A liquid-impervious back sheet 102 made of a sheet, a polyethylene sheet laminated nonwoven fabric sheet or the like is laminated in this order, and the surface sheet 101 and the back sheet 102 are joined on both sides of the absorbent core 103 for general use. ing. In this conventional sanitary napkin 100, for example, as shown in Patent Document 1, first to third embosses E101 to E103 are provided from the top sheet 101. The 1st embossing E101 draws the straight line which goes to the front-back direction at the both-sides edge part of the absorption core 103, and the center part in the front-back direction. Each of the second embosses E102 has one end of the first emboss E101 as a base end, and draws a straight line from the base end outward in the front-rear direction and inward in the width direction. The 3rd embossing E103 makes the front end of the 2nd embossing E102 a base end, and draws the straight line which goes to the front-back direction outward from this base end. These various embosses E101 to 103 have a function of controlling the flow of body fluid such as menstrual blood, and also a function of controlling the surface shape of the sanitary napkin 100.
That is, first, in the sanitary napkin 100, body fluid quickly flows in the direction in which the embosses E101 to 103 are directed (the direction in which a line is drawn). Therefore, for example, the embossing E101 that draws a straight line extending in the front-rear direction improves the diffusibility of the body fluid in the front-rear direction. On the other hand, the sanitary napkin 100 is easily bent at the portion to which the embosses E101 to 103 are provided. Moreover, the pressure P which goes to the width direction inward is applied to the center part of the front-back direction of the sanitary napkin 100 in the mounting state. For these reasons, as shown in FIG. 5 of Patent Document 1, the sanitary napkin 100 has a valley fold shape at the portion to which the embossing E101 is applied in the mounted state, and as a result, a mountain fold is formed at the central portion in the width direction. The shape of the cross section is substantially W-shaped. In conjunction with this shape change, the embossing E102, 103 is applied, so that the portion provided with the embossing E103 at the front and rear ends of the sanitary napkin 100 also has a mountain fold shape, and the surface is the wearer. Since it will be in the state (surface shape) protruded to the side, it is supposed that the fitting property with respect to the wearer is improved.
However, when pressure P inward in the width direction is applied to the central portion in the front-rear direction of the sanitary napkin 100, the portion to which the emboss E101 is applied becomes a mountain fold shape, and as a result, in the central portion in the width direction. The section may be substantially M-shaped with a valley fold. In this case, the embossed E102, 103 is provided in conjunction with the shape change, and the sanitary napkin 100 is provided with the embossed E103 at the front and rear end portions of the sanitary napkin 100 in a valley fold shape. Since it becomes a concave state (surface shape), the fit to the wearer is rather lowered, and for example, there is a possibility of causing a front-rear leakage.
Japanese National Patent Publication No. 9-502633

  The main problem to be solved by the present invention is to provide a sanitary napkin excellent in fit at the end portions in the front-rear direction.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A top sheet, an absorbent core, and a back sheet are laminated in this order, and the top sheet and the back sheet are joined to both sides of the absorbent core, respectively, and both ends of the absorbent core and the front-rear center are arranged in the front-rear direction. A sanitary napkin provided with a first emboss that draws a line to go from the top sheet,
At least one of the front end and the rear end of the absorbent core,
A second emboss that draws straight lines from the base end in the front-rear direction and both sides from the base end to the base end in the width direction is provided from the top sheet ,
A plurality of the second embosses are provided apart in the front-rear direction,
Embossing that draws a line connecting the side edges of the second embossing adjacent to each other in the front-rear direction is given from the top sheet ,
A sanitary napkin characterized by that.

[Invention of Claim 2]
A top sheet, an absorbent core, and a back sheet are laminated in this order, and the top sheet and the back sheet are joined to both sides of the absorbent core, respectively, and both ends of the absorbent core and the front-rear center are arranged in the front-rear direction. A sanitary napkin provided with a first emboss that draws a line to go from the top sheet,
At least one of the front end and the rear end of the absorbent core,
A second emboss is drawn from above the top sheet, with a center portion in the width direction as a base end and a curved line bulging inward in the width direction from the base end toward the outer side in the front-rear direction and the both sides, respectively .
A plurality of the second embosses are provided apart in the front-rear direction,
Embossing that draws a line connecting the side edges of the second embossing adjacent to each other in the front-rear direction is given from the top sheet ,
A sanitary napkin characterized by that.

[Invention of Claim 3]
The sanitary napkin according to claim 1 or 2, wherein a third emboss that draws a straight line extending inward in the front-rear direction from the base end of the second emboss is provided from the top sheet.

[Invention of Claim 4 ]
The sanitary napkin according to any one of claims 1 to 3 , wherein a distance between base ends of the second embosses adjacent to each other in the front-rear direction is 5 to 30 mm.

[Invention of Claim 5 ]
The second embossing according to any one of claims 1 to 4, wherein the second embossing has a line extending to the side of the one that is located outward in the front-rear direction rather than the one that is located inward in the front-rear direction. Sanitary napkin.

  According to the present invention, the sanitary napkin is excellent in fit at the front and rear end portions.

Next, embodiments of the present invention will be described.
〔Basic structure〕
As shown in FIGS. 2 and 3, the sanitary napkin 10 of the present embodiment includes a surface sheet 1 made of a liquid permeable sheet such as a non-woven cloth sheet or a mesh sheet, an impermeable sheet such as an absorbent core 3 and a polyethylene sheet. It has a basic structure in which the back sheet 2 made of is laminated in this order.

  The absorbent core 3 has a property of absorbing bodily fluids such as blood diaper, and is made of, for example, cotton, piled pulp, superabsorbent polymer, or the like. As the absorbent core 3, for example, a lower absorbent core and an upper absorbent core narrower than the lower absorbent core laminated on the widthwise central portion of the lower absorbent core are made of crepe paper, tissue paper, or the like. A core sheet having a certain degree of hardness that is wound in a forehead with a covering sheet to be used can be suitably used. In this laminated form, the lower absorbent core can be omitted for improving the fit and absorbency to the skin, for example, by fitting the emboss formation method as described later, the fit to the skin It can also improve the performance.

  Further, in the present embodiment, a second sheet made of a non-woven cloth or the like can be laminated between the top sheet 1 and the absorbent core 3 to improve the diffusibility of body fluid. Furthermore, in this embodiment, an upright gather having a function of preventing side leakage of body fluid can be provided on both sides.

  In this embodiment, the top sheet 1 and the back sheet 2 extend to the front back and both sides of the absorbent core 3. In the extended portion, the top sheet 1 and the back sheet 2 are joined by an adhesive such as hot melt, heat sealing, or the like, and front and rear flaps or side flaps that respectively regulate the front and rear edges or side edges of the product are formed.

  Here, the extension of the front sheet 1 and the back sheet 2 is long at the center part in the front-rear direction, and at this long part, it is folded back to the back side (outer surface side) of the underwear to constitute a so-called wing. You can also Further, the extension can be lengthened at the rear end portion in the front-rear direction, and the elongated portion can constitute a so-called end flap that improves the fit to the buttocks and the body fluid leakage preventing effect from the buttocks. However, since the sanitary napkin 10 is easier to bend when the wings and the end flaps are not provided, the effects of the present invention to be described later are easily exhibited.

  On the other hand, the outer surface of the back sheet 2 is usually provided with a fastening portion for underwear such as shorts. The fastening portion can be formed by, for example, applying a pressure-sensitive adhesive made of a styrene / butadiene copolymer, a styrene / olefin copolymer, or the like in a strip shape in the front-rear direction. This fastening part is for fastening the sanitary napkin 10 to the underwear at the time of wearing, but in the stage of providing the sanitary napkin 10 to the consumer, a release sheet for individual packaging, etc. You can also put on. The release sheet is made of a polyethylene sheet, a polypropylene sheet, a polyethylene terephthalate sheet, a laminated paper, or the like, and can be peeled from the fastening portion.

  The sanitary napkin 10 according to the present embodiment is provided with first embossing E1 that draws a line extending in the front-rear direction at both end portions and the center portion in the front-rear direction of the absorbent core 3 from the top sheet 1. As described above, the application of the first emboss E1 improves the diffusibility of the body fluid in the front-rear direction, and the sanitary napkin 10 is bent at the portion where the first emboss E1 is applied. It becomes easy. In this regard, as described above, the sanitary napkin 10 is normally fixed to the underwear. However, when the topsheet 1 and the absorbent core 3 are not joined, the topsheet 1 is lifted from the absorbent core 3 when a pressure P directed inward in the width direction is applied to the central portion in the front-rear direction of the sanitary napkin 10. This state means that the sanitary napkin 10 is bent at the upper layer portion. Moreover, even if the surface sheet 1 and the absorption core 3 are joined, the absorption core 3 has a core shape and has a certain thickness of 1 to 30 mm, for example, and therefore absorbs when the pressure P is applied. The core 3 is in a state of being scattered in the vertical direction, and this state means that the upper layer portion of the absorbent core 3 and the topsheet 1 are bent.

[First embodiment]
Next, the characteristic structure of this embodiment will be described.
As shown in FIGS. 2 and 3, the sanitary napkin 10 according to the present embodiment has a widthwise central portion at the base end S at at least one of the front end portion and the rear end portion of the absorbent core 3 and both in the example of FIG. A second emboss E2 is provided from above the top sheet 1 so as to draw straight lines from the base end S toward the outside in the front-rear direction and both sides. In this embodiment, when pressure P is applied, as shown in FIG. 4, the upper layer portion of the topsheet 1 and the absorbent core 3 moves from the second embossed E2 side to the width direction center line C side (direction indicated by reference sign F). ) As a result, at least the surface shape of the end portion of the sanitary napkin 10 in the front-rear direction, particularly the central portion T in the width direction, protrudes toward the wearer, and the fit to the wearer improves. Moreover, this effect of improving the fit is obtained regardless of whether the central part in the front-rear direction of the sanitary napkin 10 has a substantially W-shaped cross section or a substantially M-shaped cross section. In this regard, although it seems that the front-rear direction end portion of the sanitary napkin 10, particularly the center portion T in the width direction, may be recessed, this second embossing is applied at the stage where the second embossing E2 is applied. Since the portion provided with E2 is in a recessed state, the portion sandwiched between both second embosses E2 and E2 including the center portion T in the width direction is in a relatively protruding state. Therefore, when the close-up in the F direction occurs, at least the surface shape of the sanitary napkin 10 in the front-rear direction, particularly the central portion T in the width direction, protrudes greatly toward the wearer.

[Second form]
The sanitary napkin 10 of this embodiment can also change the second embossing E2 in the first embodiment to a second embossing E3 as shown in FIG.
The second emboss E3 has a base in the width direction S and draws a curve that swells inward in the width direction from the base S toward the outside in the front-rear direction and both sides. The second emboss E3 is also given from the top sheet 1 like the second emboss E2. Also in this embodiment, when pressure P is applied, as shown in FIG. 5, the upper layer portion of the topsheet 1 and the absorbent core 3 moves from the second embossed E3 side to the widthwise center line C side (the direction indicated by reference sign F). ) As a result, the same effect as the first embodiment can be obtained.
In particular, in this embodiment, since the distance L1 from the second emboss E3 to the center portion T in the width direction is relatively short, the surface shape protrudes toward the wearer in the vicinity of the second emboss E3. There is no fear of being dented in the central portion T in the width direction.
On the other hand, as shown in FIG. 6, even if the second emboss E4 has a width direction central portion S as a base end and goes from the base end S to the front and rear direction and both sides, If a curve that swells to the side (side) is drawn, the distance L1 from the second emboss E4 to the central portion T in the width direction becomes relatively long, so the surface shape is closer to the wearer in the vicinity of the second emboss E4. Although it protrudes, there exists a possibility that it may dent in the center part T of the width direction ahead.

[Third embodiment]
As shown in FIG. 7, the sanitary napkin 10 according to the present embodiment is formed from the base end S of the second emboss E2 in the first embodiment, or as shown in FIG. 8, the second emboss E3 in the second embodiment. Even if the 3rd embossing E5 which draws the straight line which goes to the front-back direction inward from the base end S of this is provided from the top sheet 1, it becomes preferable. According to this form, the part to which the second embossing E5 is applied is in a recessed state, and the body fluid diffused in the front-rear direction along the first embossing E1 is the second from the front and rear of the first embossing E1. 3 flows in the direction of emboss E5 (direction indicated by reference numeral F2), so that side leakage of body fluid is prevented. When the third emboss E5 draws a straight line extending from the proximal end S of the second embosses E2 and E3 outward in the front-rear direction, the same problem as the conventional sanitary napkin 100 described above, that is, a substantially M-shaped cross section. In such a case, there is a problem of reduced fit.

[Fourth form]
The sanitary napkin 10 of the present embodiment includes a plurality of (two in the illustrated example) spaced apart in the front-rear direction, as shown in FIG. 9, in which the second embossing E2, E3 is the second embossing E2. If it is provided, it becomes more preferable. In this regard, when the distance L3 from the base end S of the second emboss E2 (E3) to the front and rear end edges of the sanitary napkin 10 is long, that is, when the widthwise central portion T is long back and forth, the second emboss E2 Even if (E3) is given, there is a possibility that only the inner part in the front-rear direction of the center part T in the width direction protrudes toward the wearer and the outer part in the front-rear direction is recessed. However, when a plurality of the second embossed E2 (E3) are provided apart in the front-rear direction, the second emboss E2 (E3) reliably protrudes to the outer side in the front-rear direction of the central portion T in the width direction, and fit property is improved. improves.
Here, the distance L2 between the base ends S of the second embosses E2, E2 (E3, E3) adjacent to each other in the front-rear direction is usually 5 to 30 mm, preferably 10 to 20 mm. If the distance L2 between the base ends S is too short, one second emboss E2 (E3) and the other second emboss E2 (E3) are bent in the same manner, so that it does not make sense to provide a plurality of embosses. If the distance L2 between the base ends S is too long, particularly the second emboss E2 (E3) on the outer side in the front-rear direction is bent regardless of the bending of the first emboss E1.

[Fifth embodiment]
In the sanitary napkin 10 according to the present embodiment, when a plurality of second embosses are provided apart from each other in the front-rear direction, as in the fourth embodiment, both the second embosses can have different shapes. However, as shown in FIG. 10, the second emboss is drawn to the side in the direction E7 which is located outward in the front-rear direction than the case E6 located inward in the front-rear direction, that is, the second It is preferable that the side end S2 of the second emboss E7 is located on the side of the side end S2 of the emboss E6. According to this embodiment, the emboss E7 located on the outer side in the front-rear direction is preferable in that it easily protrudes toward the wearer.
Here, the distance L4 from the side end S2 of the second emboss E6 to the side end S2 of the second emboss E7 is usually 3 to 15 mm, preferably 5 to 10 mm. If this distance L4 is too short, the characteristic of being easily protruded by the wearer is lost. On the other hand, if the distance L4 is too long, the width of the absorber 3 is determined, so that the length of the emboss E6 becomes relatively short and it is difficult to protrude toward the wearer.

[Sixth embodiment]
In the present invention, such as the fifth embodiment, a plurality provided spaced a second embossing in the longitudinal direction, as shown in FIG. 11, a second embossing E6, E7 adjacent to each other in the longitudinal direction A fourth emboss E8 that draws a line connecting the side edges S2 is provided from the top sheet 1. In this embodiment, when pressure P is applied, the upper layer portion of the topsheet 1 and the absorbent core 3 is not only from the second embossed E6 and E7 side, but also from the fourth embossed E8 side to the width direction center line C side. It is brought close to. Therefore, the protrusion to the wearer side of the width direction center part T becomes more reliable, and the fit is improved.
Here, in the illustrated example, the fourth emboss E8 is linear, but the present invention is not limited to this. For example, the fourth emboss E8 has a curved shape, and the lengths of the second embosses E6 and E7 are appropriately devised to form a heart shape as a whole as shown in FIG. ), Designability can be improved.

[Seventh embodiment]
When the sanitary napkin 10 of this embodiment is provided with a plurality of second embosses separated in the front-rear direction as in the above-described form, the second emboss is provided inward in the front-rear direction as shown in FIG. It is preferable that the bending angle (indicated by reference signs A1 and A2) at the base end S is larger for the one E7 located at the outer side in the front-rear direction than the one E6 located at the front end. According to this form, since the emboss E7 bends with a weaker force than the emboss E6, it is easy to fit the wearer.
Here, although what kind of magnitude | size each bending angle is not specifically limited, Usually A1 = 90-110 degrees, A2 = 110-170 degrees, Preferably A1 = 95-100 degrees, A2 = 120- 150 °.

[Others]
(1) In the sanitary napkin 10 of this embodiment, the embosses E1 to 9 are provided from the top sheet 1, but the extent to which the embosses E1 to 9 extend in the depth direction is not particularly limited. For example, as shown in FIG. 3, the embosses E <b> 1 to 9 normally reach the absorbent core 3 and do not reach the back sheet 2, but can also reach the back sheet 2.

(2) Moreover, the depth of embossing E1-9 is 20-80% by ratio with respect to the thickness of this sanitary napkin 10, Preferably it can be 30-70%. Therefore, considering that the thickness of sanitary napkins currently on the market is 1 to 30 mm, the depth of the emboss E1 to 9 is 0.2 to 24 mm, preferably 0.3 to 21 mm.

(3) On the other hand, the width of the embosses E1 to E9 is not particularly limited, and can be, for example, 0.3 to 5 mm, preferably 0.5 to 3 mm. Further, the embosses E1 to E9 are not limited to a continuous line shape, and may be a dotted line shape. Even if it is a dotted line shape, for example, the upper layer portion of the topsheet 1 and the absorbent core 3 is brought close to the widthwise center line C side (direction indicated by the symbol F) from the second embossed E2 side. The effect is obtained.

(4) In addition to this, a relatively shallow embossing can be provided at a part other than the part to which the linear embossing E1 to 9 is provided, for example, for the purpose of improving bulkiness or touch. .

(5) In the present embodiment, the top sheet 1 has the same shape as the back sheet 2, but the present invention is not limited to this. For example, it is assumed that the top sheet 1 extends only inward in the width direction than the back sheet 2, and a side sheet made of non-woven cloth or the like is separately laminated on the side end of the back sheet 2 and bonded. it can.

  The present invention is applicable as a sanitary napkin provided with emboss.

It is a top view which shows the conventional sanitary napkin. It is a top view which shows the sanitary napkin of this form. It is the III-III sectional view taken on the line of FIG. It is a top view of the 1st form which shows the front-back direction one end part of a sanitary napkin. It is a top view of the 2nd form which shows the front-back direction one end part of a sanitary napkin. It is a top view of the reference form which shows the front-back direction one end part of the sanitary napkin. It is a top view of the 3rd form which shows the front-back direction one end part of a sanitary napkin. It is a top view of the 3rd form which shows the front-back direction one end part of a sanitary napkin. It is a top view of the 4th form which shows the front-back direction one end part of a sanitary napkin. It is a top view of the 5th form which shows the front-back direction one end part of the sanitary napkin. It is a top view of the 6th form which shows the front-back direction one end part of the sanitary napkin. It is a top view of the 6th form which shows the front-back direction one end part of the sanitary napkin. It is a top view of the 7th form which shows the front-back direction one end part of the sanitary napkin.

  DESCRIPTION OF SYMBOLS 1,101 ... Top sheet, 2,102 ... Back sheet, 3,103 ... Absorption core, 10,100 ... Sanitary napkin, E1-9, E101-103 ... Emboss, S ... Base end.

Claims (5)

  1. A top sheet, an absorbent core, and a back sheet are laminated in this order, and the top sheet and the back sheet are joined to both sides of the absorbent core, respectively, and both ends of the absorbent core and the front-rear center are arranged in the front-rear direction. A sanitary napkin provided with a first emboss that draws a line to go from the top sheet,
    At least one of the front end and the rear end of the absorbent core,
    A second emboss that draws straight lines from the base end in the front-rear direction and both sides from the base end to the base end in the width direction is provided from the top sheet ,
    A plurality of the second embosses are provided apart in the front-rear direction,
    Embossing that draws a line connecting the side edges of the second embossing adjacent to each other in the front-rear direction is given from the top sheet ,
    A sanitary napkin characterized by that.
  2. A top sheet, an absorbent core, and a back sheet are laminated in this order, and the top sheet and the back sheet are joined to both sides of the absorbent core, respectively, and both ends of the absorbent core and the front-rear center are arranged in the front-rear direction. A sanitary napkin provided with a first emboss that draws a line to go from the top sheet,
    At least one of the front end and the rear end of the absorbent core,
    A second emboss is drawn from above the top sheet, with a center portion in the width direction as a base end and a curved line bulging inward in the width direction from the base end toward the outer side in the front-rear direction and the both sides, respectively .
    A plurality of the second embosses are provided apart in the front-rear direction,
    Embossing that draws a line connecting the side edges of the second embossing adjacent to each other in the front-rear direction is given from the top sheet ,
    A sanitary napkin characterized by that.
  3.   The sanitary napkin according to claim 1 or 2, wherein a third emboss that draws a straight line extending inward in the front-rear direction from the base end of the second emboss is provided from the top sheet.
  4. The sanitary napkin according to any one of claims 1 to 3 , wherein a distance between base ends of the second embosses adjacent to each other in the front-rear direction is 5 to 30 mm.
  5. The second embossing according to any one of claims 1 to 4, wherein the second embossing has a line extending to the side of the one that is located outward in the front-rear direction rather than the one that is located inward in the front-rear direction. Sanitary napkin.
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