JP4077540B2 - Absorbent article with double solid gathers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention prevents lateral leakage of menstrual blood, cages, and the like by a barrier (gather), and even if there is a body fluid that leaks over the barrier, it is blocked by the second barrier. The present invention relates to an absorbent article provided with a double three-dimensional gather that is surely prevented from being soiled.
[0002]
[Prior art]
Conventionally, as absorbent articles such as panty liners and sanitary napkins, a cotton-like material is formed between a liquid-impermeable back sheet made of a polyethylene sheet or a polyethylene sheet laminated nonwoven fabric and a liquid-permeable top sheet made of a nonwoven fabric or the like. What intervened the absorber which consists of pulp etc. is known.
[0003]
In recent years, a number of improvements have been made to this type of absorbent article, and a product in which side leakage is prevented by a barrier provided on the side has been proposed. For example, in Japanese Patent Publication No. 7-501723, as shown in FIG. 13, a structure in which a side flap is erected by an included elastic member 54 at a side edge portion of an absorbent article 50 is proposed. The elasticized side flap 51 includes a loop member 52 extending from the side edge of the absorber 55 and returning to the side edge, and an insertion member 53 formed of a layer extending from the side edge of the absorber 55. The elastic member 54 is fixed to the distal end side of the insertion member 53. According to the publication, the tip of the upright piece is attached to the human body by the elastic side flap 51 (solid gather). Since it becomes a barrier when the body fluid comes into contact and leaks sideways, it is said that side leakage can be prevented at each stage as compared with the conventional one.
[0004]
[Problems to be solved by the invention]
However, it is often the case that what was attached to the local part of the human body at the beginning of wearing gradually shifts in relative position due to walking or exercise normally performed in daily life. For this reason, the napkin is wrinkled and a small gap is formed between the napkin and the human body, and the body fluid may leak from the napkin through the gap and stain shorts, pants and the like.
[0005]
At present, in this type of absorbent article, when a body fluid leaking over a three-dimensional gather formed on the side edge matches, there is no disclosure of means for further blocking this.
[0006]
Accordingly, the main problem of the present invention is to prevent lateral leakage of body fluids such as menstrual blood and vaginal discharge with a barrier (gather) and to take measures to block even body fluid that leaks over this barrier. Thus, an object of the present invention is to provide an absorbent article that completely prevents shorts from being soiled.
[0007]
[Means for Solving the Problems]
An absorbent article according to the present invention for solving the above-mentioned problems is an absorbent comprising an absorbent body interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and comprising a panty liner or a sanitary napkin. A sex product,
A first three-dimensional gather formed on both sides of the absorbent article so as to protrude to the surface side with the upper side position of the side of the absorbent body as an upright base end, and relatively formed at an outer position of the first three-dimensional gather together we are, together with a substantially continuous from the side edge of the liquid-impermeable back sheet, provided extending outwardly, and a second standing gather projecting surface formed only by non-woven fabric Prepared,
In the second standing gather section, substantially along the longitudinal direction of the absorbent article, as well as disposed proximal side elastic member in a side edge or its vicinity of the liquid-impermeable back sheet, the second stereoscopic The front- end-side elastic members are respectively arranged at the rising-up end portions of the gathers .
[0008]
Preferably, in the second three-dimensional gather portion, the base end side elastic member is arranged within a range of 5 mm on the outer side or the inner side with respect to the side edge of the liquid-impermeable back sheet, and from the side edge of the absorber. It is desirable that they are arranged on the outer side at a distance of at least 10 mm or more.
[0009]
On the other hand, the elastic strength of the proximal elastic member is 10 to 300 g, the elastic strength of the distal elastic member is 10 to 100 g, and the elastic strength ratio in the relative relationship between the two elastic members is the proximal elastic member. : It is desirable that the tip side elastic member is 1: 1 to 3: 1.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a perspective view of a sanitary napkin N according to the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG.
[0011]
The sanitary napkin N (hereinafter simply referred to as napkin) includes a liquid-impervious back sheet 1 made of a polyethylene sheet, a liquid-permeable top sheet 3 that allows permeation of menstrual blood and vaginal discharge, and both of these sheets. An absorbent body 2 made of cotton-like pulp or synthetic pulp interposed between 1 and 3 and a pair of left and right first projections provided on the surface side with the upper surface position of the side portion of the absorbent body 2 as an upright base end The three-dimensional gathers 4 and 4 are relatively disposed outside the first three-dimensional gathers 4 and 4, and the nonwoven fabric 10 is provided substantially continuously from the side edge of the liquid-impermeable back sheet 1. A pair of left and right second three-dimensional gathers 5 and 5 formed so as to protrude to the surface side, and in the second three-dimensional gathers 5 and 5 part, in the vicinity of the standing base end along the substantially longitudinal direction of the absorbent article N The proximal side With arranging a sexual member 8, in which the distal end side elastic member 7 along a substantially longitudinal direction of the absorbent article N to the standing tip section and each arranged.
[0012]
Around the absorbent body 2, the outer edge portions of the liquid-impervious backsheet 1 and the liquid-permeable topsheet 3 are joined at the upper and lower end portions by an adhesive such as hot melt or an adhesive means such as heat seal. In addition, at both side portions thereof, the liquid-impervious backsheet 1 and the upright base portion of the nonwoven fabric 10 forming the second three-dimensional gathers 5 and 5 are bonded with an adhesive such as hot melt or a heat seal. The absorbent body 2 is held inside by being joined by means.
[0013]
Hereinafter, more specifically, the structure of the napkin N will be described in detail.
As the liquid-impervious backsheet 1, a sheet material having at least a water shielding property such as polyethylene is used, but in recent years, a material having moisture permeability tends to be used from the viewpoint of preventing stuffiness. As this water-impervious / breathable sheet material, for example, a microporous material obtained by forming a sheet by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching in a uniaxial or biaxial direction. A sheet is preferably used.
[0014]
Next, a porous or non-porous nonwoven fabric or a perforated plastic sheet is suitably used as the liquid-permeable top sheet 3. The material fibers that make up the nonwoven fabric can be synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or amide, recycled fibers such as rayon or cupra, natural fibers such as cotton, and spunbond. Nonwoven fabric obtained by an appropriate processing method such as a method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace nonwoven fabric is excellent in terms of richness in flexibility and drape, and the thermal bond nonwoven fabric is excellent in terms of being bulky and soft.
[0015]
When a large number of through-holes are formed in the liquid-permeable top sheet 3, menstrual blood, venom and the like are quickly absorbed into the absorbent body 2 and have excellent dry touch properties. In this case, a diffusion sheet (not shown) having particularly excellent hydrophilicity is interposed between the liquid-permeable top sheet 3 and the absorbent body 3 in order to prevent the body fluid absorbed from returning. desirable.
[0016]
In the illustrated example, the width dimension of the liquid-permeable top sheet 3 is slightly longer than the width of the absorbent body 2 and covers only the absorbent body 2 as shown in the central sectional view of FIG. The one-dimensional gathers 4 and the second three-dimensional gathers 5 formed on the outside thereof prevent the permeation of body fluids, specifically, the gather-forming nonwoven fabric 10 different from the liquid-permeable top sheet 3, or Depending on the purpose such as enhancing the feeling of touch, it is made of a nonwoven fabric material subjected to appropriate water repellent treatment or hydrophilic treatment. As the gather forming nonwoven fabric 10, natural fibers, synthetic fibers, regenerated fibers, or the like, which are processed by an appropriate processing method can be used. Preferably, in order to eliminate creaking and prevent stuffiness It is preferable to use a non-woven fabric with reduced basis weight and air permeability. Specifically, it is desirable to use a nonwoven fabric prepared with a basis weight of 18 to 23 g / m ² , and in order to surely prevent permeation of body fluids, silicon-based, paraffin metal-based, alkylchromic chloride-based water repellents A water-repellent non-woven fabric coated with the above is preferably used.
[0017]
Next, the structure of the first three-dimensional gather 4 and the second three-dimensional gather 5 will be described with reference to FIG. 4 which schematically shows the gather-forming nonwoven fabric 10, the inner side end of the absorbent body 2. The side edge upper portion B is bonded to the upper surface of the liquid-permeable top sheet 3 with an adhesive such as a hot melt adhesive, and has a predetermined width, specifically, a folding corresponding to the standing height of the first three-dimensional gather 4 A bag-like portion 10B (hereinafter referred to as a bag-like flap) is formed by bonding the intermediate portion with a width at a portion C that overlaps the side edge upper portion B, and both ends or A tape-like elastic member 6 having a certain width and fixed at an appropriate position in the longitudinal direction is provided, and the bag-like flap 10B is erected by the contraction action of the tape-like elastic member 6, and the first standing Gather 4 is formed. As shown in FIG. 3, the first three-dimensional gather 4 is folded at the end of the napkin N in the longitudinal direction with a half of the height of the standing piece as a fold line, and the joining surface is hot-melted or the like Is glued by. This folded part also becomes a bulky part protruding to the surface side to prevent body fluid leaking back and forth from getting over the side part and flowing out. The expansion / contraction ratio of the tape-like elastic member 6 is preferably 120 to 300%, particularly 130 to 160%, and the elastic strength is 10 to 45 g, particularly 15 to 30 g.
[0018]
On the other hand, the middle of the sheet portion that extends further outward than the C portion is first adhered to the surface side of the liquid-impermeable backsheet 1, and the portion extending outward from these is folded back twice. A bag-like flap 10A is formed, and a thread-like elastic member 7 having both ends or appropriate positions in the longitudinal direction fixed to the inside of the tip end of the bag-like flap 10A is disposed. The second three-dimensional gather 5 is formed by raising the shaped flap 10A portion on the surface side.
[0019]
In the present invention, the thread-like elastic member 8 is disposed particularly in the vicinity of the standing base end of the second three-dimensional gather 5. Although the bag-shaped flap 10A can be erected only by the thread-like elastic member 7 disposed at the tip of the second three-dimensional gather 5, the liquid-impermeable back sheet 1 is made of an olefin-based material such as polyethylene or polypropylene. Resin is used and has relatively higher rigidity than the nonwoven fabric 10. Therefore, when only the thread-like elastic member 7 is used, the standing state of the second three-dimensional gather 5 effectively stands up the side portion of the liquid-impermeable back sheet 1 as shown in the schematic view of FIG. It cannot be made, but it becomes a standing aspect which stands | starts up by using the edge part P of the liquid-impermeable back sheet 1 as a standing base end. On the other hand, when one more thread-like elastic member 8 is added to the vicinity of the standing base end of the second three-dimensional gather 5, as shown in FIG. 9B, the liquid-impermeable back sheet 1 side The part can be started up effectively. That is, the base end portion of the second three-dimensional gather 5 is lifted upward by the thread-like elastic member 8, and the gather-like end portion is reliably and flexibly fitted around the suspension by the thread-like elastic member 7 on the tip end side. Thus, by adding the thread-like elastic member 8, the depth of the curvature of the second three-dimensional gather 5 is increased, the leakage prevention from the side is improved, and the followability to the undercarriage is remarkably good. Become.
[0020]
In this case, as shown in FIG. 4 , the thread-like elastic member 8 disposed on the standing base end side of the second three-dimensional gather 5 is outside or on the basis of the side edge P of the liquid-impermeable backsheet 1. Desirably, the inner side is within a range of 5 mm (± S), most preferably at the side edge P of the liquid-impervious backsheet 1, and at least 10 mm (L) outside the side edge of the absorbent body 2. It is desirable to arrange at the above-mentioned distant positions. The elastic elastic force of the thread-like elastic member 8 is effectively set so that the thread-like elastic member 8 is within 5 mm (± S) on the outer side or the inner side with respect to the side edge P of the liquid-impervious backsheet 1. This is because the liquid-impervious back sheet 1 is transmitted to and raised upward, and at least 10 mm (L) or more away from the side edge of the absorbent body 2 is located away from the absorbent body 2. This is to avoid troubles during operation by avoiding interference with the other in the elastic member installation process of the operation line by separating the fixed amount.
[0021]
By the way, in this example, the standing height of the second three-dimensional gather 5 is sufficiently ensured, and the distance between the thread-like elastic member 7 and the thread-like elastic member 8 is illustrated in a proportioned manner. 8 is closely related, specifically when the standing height of the second three-dimensional gather 5 is small, or when the thread-like elastic member 8 is outside the liquid-impervious backsheet 1 end portion P by +5 mm (+ S) When the elastic members 7 and 8 are in close proximity to each other, the two thread-like elastic members 7 and 8 are formed along the longitudinal direction of the strip-shaped pleat absorbent article N. However, even in this case, it is the same in that the elastic elastic member 8 on the standing base end side acts to lift the base end side of the flap upward.
[0022]
On the other hand, in the relationship between the thread-like elastic member 8 and the thread-like elastic member 7, that is, in the relative relationship between the standing proximal end side elastic member and the standing distal end side elastic member, the standing proximal end side elastic member is mainly liquid-impermeable. It is responsible for the upright action of the back sheet 1 side, the tip side elastic member is mainly responsible for the fit action around the suspension, and since the function of each elastic body is different, between the elastic members The elastic strength ratio is set to stand upright end side elastic member: upright end side elastic member = 1: 1 to 3: 1, preferably 1.2: 1 to 2: 1. In principle, it is desirable to increase the elastic power of the proximal elastic member to lift the relatively rigid liquid-impervious backsheet 1, but if the elastic power is increased too much Since there is a negative effect such as rounding in the product state, it is preferable that the elastic power of the base end side elastic member is suppressed to within 3 times that of the front end side elastic member even if it is large. If a specific numerical value range is mentioned, the base end side elastic member may be 10 to 300 g, preferably 60 to 300 g, and the front end side elastic member may be 10 to 100 g, preferably 60 to 100 g.
[0023]
On the other hand, as the tape-like or thread-like elastic members 6 to 8, foams of usually used styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, and the like are used. Various things, such as a body and a film, can be used. In this case, in particular, a tape-shaped tape having a certain width is used for the inner first three-dimensional gather 4 while reliably preventing leakage of menstrual blood and the like, and taking into consideration the contact with the human body. The outer second three-dimensional gather 5 is preferably made of a thread-like elastic member with an emphasis on fit to the body. In other words, since the first three-dimensional gathers 4 and 4 are mounted so as to be pressed against local parts of the human body, they are gathers (barriers) that make contact with a certain width, while the second gathers 5 and 5 In order to ensure that the tip of the foot comes into contact with the base part of the foot, it is preferable to make it fit to the movement of the body as a thread rather than a tape.
[0024]
When the napkin N is attached to the local part of the body, as shown in FIG. 12, the first gather 4 and the wrinkle and wrinkle are not applied when the napkin N is applied to the local part. The second gathers 5 are worn so that both are continuously in close contact with the body and no gap is formed. In this case, the second three-dimensional gathers 5 and 5 are mounted so as to come into contact with the base positions of the legs at the outer positions of the shorts S. The first three-dimensional gathers 4 and 4 block the leakage of body fluid in the shorts S to guard against side leakage, and a gap is formed between the first three-dimensional gather and skin due to lateral displacement and dripping. Even if there is a body fluid that leaks over the gathers 4 and 4, the second three-dimensional gathers 5 and 5 block the body fluid and completely prevent the shorts S from becoming dirty.
[0025]
In addition, according to the formation aspect of the three-dimensional gather which concerns on the said 1st example, the cost cost becomes low by the point by which the 1st solid gather 4 and the 2nd solid gather 5 are formed of the nonwoven fabric material 10 of 1 sheet. In addition, since the number of parts is reduced, it is preferable from the viewpoint of operability.
[0026]
By the way, regarding the formation aspect of the said 1st solid gather 4 and the 2nd solid gather 5, other aspects can be considered. The example shown by FIG. 5 is an example which comprised the 1st three-dimensional gather 4 and the 2nd three-dimensional gather 5 by the nonwoven fabrics 11 and 12 for separate gather formation, respectively. Specifically, as in the first example, the first three-dimensional gather 4 is formed of a hot melt adhesive or the like on the inner side end of the first gather-forming nonwoven fabric 11 at the upper side edge B of the container 2. Adhering to the upper surface of the liquid-permeable top sheet 3 with an adhesive, the intermediate portion overlaps the side edge upper portion B with a predetermined width, specifically, a folded width corresponding to the standing height of the first three-dimensional gather 4. The bag-like flap 10B is formed by re-adhering to the portion C, and the first three-dimensional gather 4 standing on the surface side is formed by providing a tape-like elastic member 6 at the tip of the bag-like flap 10B. And the flap part extended further outward from the said C part adhere | attaches to this part as a side edge stop of the liquid-impermeable backsheet 1. FIG.
[0027]
On the other hand, the second three-dimensional gather 5 joins one end of the gather-forming nonwoven fabric 12 to the outer surface of the side edge of the liquid-impermeable back sheet 1 with a hot melt adhesive, and a thread-like elasticity at the joint. The member 8 is fixed, the non-woven fabric 12 is folded back at a predetermined width at the other outer end portion, the folded end portion D is bonded by hot melt, and the thread-like elastic member 7 is provided inside the folded bag to stand on the surface side. The second three-dimensional gather 5 is formed.
[0028]
In addition, as shown in FIG. 6, the first three-dimensional gather 4 and the second three-dimensional gather 5 are formed by the gather forming nonwoven fabric 13, and the side edges of the liquid-impermeable back sheet 1 are folded back with a predetermined width. The thread-like elastic member 8 may be provided inside the folded bag interior F.
[0029]
Furthermore, as shown in FIG. 7, in order to prevent the noise between the liquid-impervious back sheet 1 and the shorts S, etc., when the outer surface side of the liquid-impervious back sheet 1 is laminated with a non-woven fabric. First, the first three-dimensional gather 4 is formed by the gather-formed non-woven fabric 14, and the second three-dimensional gather 5 extends the laminated non-woven fabric 15 further outward than the edge of the liquid-impermeable back sheet 1, You may make it form by this extended flap part 15A. Furthermore, as shown in FIG. 8, the side end portion of the liquid-impermeable back sheet 1 may be folded back with a predetermined width, and the thread-like elastic member 8 may be provided inside the folded portion F.
[0030]
On the other hand, the configuration having the double three-dimensional gathers 4 and 5 can also be applied to the winged napkin N ′ shown in FIG. The wing W has a pressure-sensitive adhesive applied to the back side thereof, and prevents lateral slipping by wrapping around the side edge of the crotch portion of the shorts and attaching it to the outer surface of the shorts when worn. Can be formed integrally with the second three-dimensional gather 5 according to the present invention. Specifically, as shown in FIG. 11, one end of the nonwoven fabric material 16 forming the second three-dimensional gather 5 is joined to the outer surface of the side edge of the liquid-impervious backsheet 1, The second solid gather 5 is formed by folding back at the tip (distal end) of the standing piece, joining the adjacent position G with an adhesive, and disposing the thread-like elastic body 7 inside the bag, and The flap portion 16 further extending from the adhesive portion G is caused to function as the wing W.
[0031]
【The invention's effect】
As described in detail above, according to the present invention, since a double three-dimensional gather is formed on both sides of the absorbent article, side leakage of body fluids such as menstrual blood and cages is completely prevented, and shorts It becomes possible to prevent dirt. In addition, since the elastic member is also arranged on the standing base end side in the outer three-dimensional gather part, the side part of the liquid-impervious backsheet is lifted so that the gather tip is securely and flexibly fitted around the suspension. As a result, the side leakage prevention property is further improved and the wearing feeling is also improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a sanitary napkin 1 according to the present invention.
FIG. 2 is a view taken along the line II-II in FIG.
FIG. 3 is a view taken along the line III-III in FIG. 1;
FIG. 4 is a schematic view of a formation mode of a double solid gather according to the first example.
FIG. 5 is a schematic view of a formation mode of a double solid gather according to a second example.
FIG. 6 is a schematic diagram of a formation mode of a double solid gather according to a third example.
FIG. 7 is a schematic view of a formation mode of a double solid gather according to a fourth example.
FIG. 8 is a schematic view of a formation mode of a double solid gather according to a fifth example.
FIG. 9 is an operation explanatory view of the thread-like elastic member 8 arranged at the base end of the second three-dimensional gather 5;
FIG. 10 is a perspective view of a napkin with a wing N ′.
FIG. 11 is a schematic diagram of a form of forming a double solid gather in which wings W are integrally formed.
FIG. 12 is a view showing a mounting example of the napkin N.
FIG. 13 is a half sectional perspective view of a napkin 50 having a conventional three-dimensional gather.
[Explanation of symbols]
N ... sanitary napkin, 1 ... liquid-impervious back sheet, 2 ... absorbent body, 3 ... liquid-permeable top sheet, 4 ... first solid gather, 5 ... second solid gather, 6 ... tape-like elastic body, 7 ... thread-like elastic body (front end side elastic member), 8 ... thread-like elastic body (base end side elastic member), W ... wings, 10-14 ... nonwoven fabric for gather formation, 15 ... laminated nonwoven fabric

Claims (3)

An absorbent article is formed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and is made of a panty liner or a sanitary napkin ,
A first three-dimensional gather formed on both sides of the absorbent article so as to protrude to the surface side with the upper side position of the side of the absorbent body as an upright base end, and relatively formed at an outer position of the first three-dimensional gather together we are, together with a substantially continuous from the side edge of the liquid-impermeable back sheet, provided extending outwardly, and a second standing gather projecting surface formed only by non-woven fabric Prepared,
In the second standing gather section, substantially along the longitudinal direction of the absorbent article, as well as disposed proximal side elastic member in a side edge or its vicinity of the liquid-impermeable back sheet, the second stereoscopic absorbent article having a double standing gathers, characterized in that the front end side elastic member is respectively arranged on the upright front end site of the gather. In the second three-dimensional gathered portion, the base end side elastic member is arranged within a range of 5 mm on the outer side or the inner side with respect to the side edge of the liquid-impermeable back sheet, and outside the side edge of the absorber. The absorptive article provided with the double solid gather according to claim 1 arranged at a distance of at least 10 mm or more. The elastic strength of the base end side elastic member is 10 to 300 g, the elastic strength of the front end side elastic member is 10 to 100 g, and the elastic strength ratio in the relative relationship between the two elastic members is the base end side elastic member: front end side The absorbent article provided with the double three-dimensional gather according to claim 1 or 2, wherein the elastic member is 1: 1 to 3: 1.

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