JP2002045396A - Absorptive goods - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a side leakage of menstrual blood or vaginal secrete, or the like, by a double obstacle wall (gathers) as well as forming a remaining space for the menstrual blood, or the like which can function effectively by the solid gathers of both sides, and keep the shape in a longitudinal direction of a product in a cured shape. SOLUTION: Absorbent goods N where an absorbent body 2 lies between a liquid permeable top sheet 3 and a liquid impermeable back sheet 1 are furnished. A right and left pair of first solid gathers 4, 4 which is formed protrusively in an inner direction by using a side upper position of the absorbent body 2 as starting point in both sides of the absorbent goods N, and a nonwoven fabric 6 which is practically continuous from the side edge of the liquid impermeable back sheet 1 at the outside position of the first solid gathers 4, 4 and the back sheet constitute the goods N. Second solid gathers 5, 5 which are formed protursively in an outside direction by using practically the upper position of the liquid impermeable back sheet 1 as starting point K are furnished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-walled structure in which lateral leakage of menstrual blood, vaginal discharge, etc. is reliably prevented by a double barrier (gather) and the entire shape in the longitudinal direction of the product is kept curved. The present invention relates to an absorbent article having three-dimensional gathers.

[0002]

2. Description of the Related Art Conventionally, as an absorbent article such as a panty liner, a sanitary napkin, a vaginal sheet, an incontinence pad, etc., a liquid-impermeable back sheet made of a polyethylene sheet or a polyethylene laminated non-woven fabric, a non-woven fabric or a porous sheet It is known that an absorbent made of cotton pulp is interposed between a liquid-permeable top sheet made of a plastic sheet or the like.

Many improvements have been made to this type of absorbent article, and various proposals have been made to effectively prevent lateral leakage of menstrual blood, vaginal discharge, and the like. For example,
In Japanese Patent Application Laid-Open No. 11-104174 (Conventional Example 1), as shown in FIG. The first three-dimensional gather 51 is formed relatively at an outer position of the first three-dimensional gather 51, and
A second three-dimensional gather 53 protruding from the side edge of the liquid-impermeable back sheet 52 to a surface formed of a nonwoven fabric provided substantially continuously; Along the substantially longitudinal direction of the article 50,
An absorbent article having a structure in which a base-side elastic member 54 is provided in a portion near a rising base end, and a distal-side elastic member 55 is provided in a standing tip portion, respectively. The base-end-side elastic member 54 has a function of securely and flexibly fitting the distal end of the second three-dimensional gather 53 around the crotch by lifting the base end of the second three-dimensional gather 53 upward.

Further, Japanese Patent Application Laid-Open No. Hei 7-136212 (conventional example 2)
Then, as shown in FIG. 10, on both sides of the absorbent article 60, an intermediate portion of a sheet 61 made of water repellent or water impermeable is fixed with a hot melt adhesive or the like, and both side flaps 62 of the intermediate fixed portion are fixed. 63 is cross-section V by the elastic member 64
There is disclosed an absorbent article having a structure of standing up in a letter shape.

[0005]

In each of the above-mentioned two absorbent articles, a double solid gather is formed on the side of the absorber so that menstrual blood or the like leaking over the inner solid gather is temporarily prevented. Even in the case of the case, it is common in that menstrual blood is blocked by the outer three-dimensional gathers to prevent lateral leakage.

However, in the case of the absorbent article of Conventional Example 1, as shown in FIG. 9 showing the mounted state, the tip of the first three-dimensional gather 51 standing outward and the second solid gather 51
The first solid gathers 51 and the second solid gathers 53 are overlapped depending on the mounting state, and substantially one solid gather is formed. In some cases, the prevention effect could not be exerted. Further, despite the fact that a pocket-like space that can function as a stagnant space for menstrual blood and the like is formed between the first three-dimensional gathers 51 and the second three-dimensional gathers 53, the respective three-dimensional gathers 51 and 53 are formed. In the case where the leading end portions are close to each other and form a substantially one-dimensional gather, there is a problem that the pocket-like space is crushed and is not effectively used as a stay space for menstrual blood and the like.

On the other hand, in the case of the absorbent article of Conventional Example 2,
The distal end of the inner gather 62 and the distal end of the outer gather 63 having a V-shaped cross section come into contact with the skin, but the inner gather 62 and the outer gather 63 are erected with the same point on the absorber as the erect base point. Therefore, it is difficult to form a large stagnation space for menstrual blood and the like by the two gathers 62 and 63, and when the absorber is attached in a state of being in close contact with the skin, the inner gather 62 and the outer gather The gathers 63 are squashed by the rigid absorber, and a stagnant space such as menstrual blood cannot be effectively formed. In addition, both gathers 62 and 63 are set up starting from the absorber, and are easily affected by the movement of the absorber. That is, when the absorber is separated from the skin by the movement of the wearer, the distal end of the gather may be separated from the skin, which causes a problem such as menstrual blood leaking.

On the other hand, in this type of absorbent article, the rigidity of the absorber is significantly higher than other components. As a result, it is difficult to keep the entire product in a curved shape in the longitudinal direction, it is difficult to optimally fit the user's local area, there is a problem that separation can occur between the absorbent article and the skin, and leakage occurs. .

[0009] Therefore, a main object of the present invention is to reliably prevent lateral leakage of menstrual blood, vaginal discharge, and the like by a double barrier (gather) and to retain menstrual blood and the like which can function effectively by both three-dimensional gathers. An object of the present invention is to provide an absorbent article provided with a double three-dimensional gather that can form a space and keeps a longitudinal shape of a product in a curved shape.

[0010]

Means for Solving the Problems The absorbent article of the present invention for solving the above-mentioned problems is an absorbent article in which an absorbent is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. A pair of left and right first three-dimensional gathers formed on both sides of the absorbent article so as to protrude inward with the side upper surface position of the absorbent body as a standing base point; A non-woven fabric provided substantially continuously from a side edge of the liquid-impermeable back sheet at the outer position, or a non-woven bag formed of the non-woven fabric and the liquid-impermeable back sheet; A second three-dimensional gather formed so as to protrude outward from a side edge or an upper surface position of the sheet as a standing base point.

In this case, in the first and second solid gathers, the width dimension from the inner side edge of the first solid gather to the outer side edge of the second solid gather may be smaller. , And preferably occupies 15% or more of the product width of the absorbent article.

It is preferable that the length of the first three-dimensional gather from the standing base point to the free standing end is 2 to 8 mm, and that the first three-dimensional gather is disposed along the longitudinal direction of the absorbent article at the leading end of the first three-dimensional gather. The elastic elastic member provided has an elasticity of 1
It is desirable that the elastic strength is 30 to 200% and the elastic strength is 5 to 30 gf.

On the other hand, regarding the second three-dimensional gather,
It is desirable that the length from the standing base point to the free standing end is 4 to 25 mm.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a developed plan view of a sanitary napkin N according to the present invention, and FIG.
FIG. 3 is a view along the line III-III in FIG. 1, and FIG. 4 is a view along the line IV-IV in FIG. 1.

The sanitary napkin N (hereinafter, simply referred to as a napkin) includes a liquid-permeable back sheet 1 made of a polyethylene sheet or the like, and a liquid-permeable top sheet 3 that allows menstrual blood, vaginal discharge, etc. to pass through quickly. , These two sheets 1,
Absorber 2 made of cotton-like pulp or synthetic pulp interposed in 3 and a pair of left and right first three-dimensional gathers 4 and 4 formed so as to protrude inward with the upper surface of the absorber side as the base. And the liquid-impervious back sheet 1 which is disposed outside the first three-dimensional gathers 4 and 4 and
Is formed by the nonwoven fabric provided substantially continuously from the side edge of the nonwoven fabric, or the nonwoven fabric and the liquid-impermeable backsheet 1, and the outer edge or the upper surface position of the liquid-impermeable backsheet 1 is set as an upright base point. The pair of left and right second three-dimensional gathers 5 and 5 are formed so as to protrude in the direction of orientation.

The function of the first three-dimensional gather 4 mainly has a function of preventing a lateral leak such as menstrual blood from leaking, and a shape stabilizing function of keeping the entire longitudinal shape of the product in a curved shape.
The second three-dimensional gather 5 mainly has a function to prevent menstrual blood or the like that escapes over the first three-dimensional gather when the menstrual blood or the like escapes from the first three-dimensional gather and prevents the menstrual blood or the like from leaking outside.

More specifically, the liquid-impermeable back sheet 1 is made of a sheet material having at least water-blocking properties, such as polyethylene or polypropylene. Have a tendency to be suitably used. The water-permeable and moisture-permeable sheet material is, for example, a microporous material obtained by melting and kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. A flexible sheet is preferably used.

Next, as the liquid-permeable top sheet 3, a perforated or non-porous nonwoven fabric or a porous plastic sheet is preferably used. As the material fibers constituting the nonwoven fabric, olefin-based such as polyethylene or polypropylene, polyester-based, other synthetic fibers such as polyamide-based,
Regenerated fibers such as rayon and cupra, and natural fibers such as cotton can be used, and a nonwoven fabric obtained by an appropriate processing method such as a spunlace method, a spun bond method, a thermal bond method, a melt blown method, or a needle punch method is used. be able to. Among these processing methods, the spunlace method is excellent in that it is rich in flexibility and drapability, and the thermal bond method is excellent in that it is bulky and soft.

When a large number of holes are formed in the liquid-permeable top sheet 3, menstrual blood and vaginal discharge (hereinafter referred to as menstrual blood) can be quickly absorbed, and the dry touch property can be improved. It will be excellent.

The absorbent 2 may be any as long as it can absorb and retain bodily fluids. Usually, a mixture of fluff-like pulp mixed with a water-absorbing polymer powder is preferably used in terms of absorption function and cost. You. The absorbent body 2 retains its shape, rapidly diffuses menstrual blood, etc., and prevents crepe paper 1 from absorbing menstrual blood once absorbed.
It is desirable to be surrounded by zero. In addition, the absorber 2
As shown, the flat shape is a fit cut shape (gourd shape) to ease the contact with the crotch
Or a rectangular shape, an oval shape, or the like. That is, any planar shape adopted in this type of absorbent article can be adopted.

A groove-shaped side emboss 7 and a front emboss 8 are formed on the surface of the liquid-permeable top sheet 3 in order to bulge the blood discharge port corresponding portion in a mountain shape and to contain absorbed menstrual blood and the like. And a back emboss 9 are formed. The side embosses 7 and 7 are arc-shaped embossed lines formed on both sides of the blood discharge port corresponding portion and striking inward, and the front emboss 8 is a front portion of the blood discharge port corresponding portion. The back embossing line 9 is a semi-circular embossed line projecting forward and formed at the position, and the back embossing line 9 is a semi-circular embossed line projecting rearward and formed at the rear position of the blood discharge port corresponding portion.

The liquid-impervious back sheet 1 and the liquid-pervious top sheet 3 are joined at the upper and lower ends around the absorber 2 by an adhesive such as hot melt or an adhesive means such as heat sealing. The front and rear flaps BF are formed, and the liquid-impermeable back sheet 1 and the gather-formed nonwoven fabric 6 forming the first three-dimensional gathers 4 and the second three-dimensional gathers 5 are formed on both sides thereof by hot melt or the like. The side flaps SF are formed by bonding with an adhesive such as an adhesive or a heat seal.

The width dimension of the liquid-permeable top sheet 3 is shown in FIG.
2 and the front end sectional view of FIG.
Thus, the absorber 2 is slightly longer than the width of the absorber 2 and covers the absorber 2.
The first three-dimensional gather 4 and the
The second three-dimensional gather 5 formed on the outside is formed of the liquid-permeable toe.
Gather-formed nonwoven fabric 6 different from the back sheet 3, specifically,
Prevents menstrual blood from penetrating, or enhances
Polyethylene, polypropylene, etc.
Olefin, polyester, nylon, etc.
Any non-woven fabric made of hydrophobic fibers or hydrophilic non-woven fabric
Recon, paraffin metal, alkylchromic chroma
Water-repellent non-woven fabric coated with a lid-based water repellent
It is formed by This gather-forming nonwoven fabric 6
As it eliminates the feeling of stiffness and effectively removes stuffiness
Non-woven fabric with a reduced basis weight and air permeability to prevent
It is better to use a cloth. Specifically, the grammage is 18 to 23 g /
m ²It is desirable to use a non-woven fabric manufactured as follows.

Further, the structure of the first three-dimensional gathers 4 and the second three-dimensional gathers 5 will be described in detail with reference to FIGS. 2 and 5. The gather-forming nonwoven fabric 6 has an inner end that faces the absorber 2. At the upper edge position E, it is adhered to the upper surface of the liquid-permeable top sheet 3 by the hot melt adhesive, and the inner side of the upper edge side position E of the absorber 2 stands up with the edge as the upright base point. A double sheet portion is formed by bonding the intermediate portion at a portion F overlapping the side edge upper position E with a folded width corresponding to the standing length, and a double-sheet portion is provided at both ends or A first elastic expansion / contraction member 11 having an appropriate position fixed in the longitudinal direction is provided therein. Further, as shown in FIG. 3, the inner side of the double sheet portion is formed on the liquid-permeable top sheet 3 at both ends in the longitudinal direction of the sanitary napkin N by hot melt adhesive or the like. By being adhered, the double sheet portion rises in the inward direction by the contraction action of the first elastic expansion / contraction member 11 to form the first three-dimensional gather 4. The bonding at the upper side edge position E may be continuous bonding or intermittent bonding.

The first three-dimensional gather 4 mainly has a function of preventing lateral leakage such as menstrual blood and the like, and a shape stabilizing function of maintaining the entire longitudinal shape of the product in a curved shape. This 2
In order to effectively perform the three functions, the first elastic elastic member 11 is required to have an elasticity ratio (length at extension / length at no stress × 100).
It is desirable that the elastic strength is 130 to 200%, preferably 150 to 170%, and the elastic strength is 5 to 30 gf, preferably 10 to 20 gf. Further, in order to make the overall shape of the product into the curved shape shown in FIG. 6, it is necessary to effectively apply the stretching force of the first elastic stretching member 11 to the absorber 2. Therefore, the first
It is desirable that the standing length L3 of the _three- dimensional gathers 4 be 2 to 8 mm. When standing the length L ₃ is less than 2mm is likely side leakage occurs away due contact shallower becomes wearer's movement is generated with the skin. Also, when the standing length L ₃ exceeds 8mm are effectively no longer able to act contractile force of the first elastic stretchable member 11 in the absorber 2, and difficult to keep the entire product into a curved shape Become.

In fixing the first elastic member 11, a method of applying a hot melt to the elastic member and bonding it to the gather-forming nonwoven fabric 6 and a method of applying a hot melt adhesive to the gather-forming nonwoven fabric 6 to apply elasticity Either of the two methods, ie, the method of bonding and fixing the member, can be adopted. However, in order to prevent the gather-forming nonwoven fabric 6 from being hardened by hot melt and to soften the contact with the skin, it is preferable to use the former elastic stretching member side. It is desirable to adopt a method of applying and fixing a hot melt adhesive to the substrate. It is desirable that the first elastic member 11 be fixed at a position slightly inside the foremost portion in order to ease contact with the skin.

Further, the position of the base point of the first three-dimensional gather 4, that is, the distance L ₁ from the side edge of the absorber 2 is 1
It is desirable to set it within 0 mm. If this distance L ₁ is greater than 10mm is not preferable leading to reduction of the effective absorption area between the first standing gather 4,4.

On the other hand, the sheet portion extending further outward than the F portion extends beyond the side edge of the liquid-impermeable back sheet 1 to the outside, and is then folded back to be double-folded. The inner surface of the flexible back sheet 1 is adhered to the waist edge. In the double folded portion, and at a position outward from a side edge of the liquid-impermeable back sheet 1, one or a plurality of
In the illustrated example, two second elastic members 12 are arranged. Due to the contraction force of the second elastic elastic members 12, 12, the side flap portion SF is moved to the liquid impermeable backsheet 1.
The second three-dimensional gather 5 is formed so as to protrude outward with the upper part as a base. The distance L ₂ extending according gather forming nonwoven fabric 6 from the side edges of the liquid impervious back sheet 1, it is desirable to or more 5 mm. The extension distance L
_{When 2} is less than 5 mm, the side edge of the liquid-impermeable backsheet 1 that is harder than the nonwoven fabric comes into contact with the skin, and the feeling of wearing is impaired. If the extending distance L ₂ is large, sometimes standing base point of the second standing gathers 5 is a side edge of the liquid impervious back sheet 1.

The second three-dimensional gathers 5 mainly include the first three-dimensional gathers.
When menstrual blood or the like that escapes over the three-dimensional gathers 4 is blocked, it blocks the menstrual blood or the like and prevents the menstrual blood from leaking out. In order to exhibit this function effectively, the second elastic members 12 and 12 must
0%, preferably 130-150%, elastic strength 5-60
g, preferably 10 to 35 g.

The second solid gather 5 has an upright length L4 from the upright base point K of the liquid-impermeable backsheet 1 of ₄ to 2 mm.
Preferably, it is 5 mm. When the standing length L4 is less than ₄ mm, the degree of contact with the skin is weak, and depending on the movement of the wearer, a gap may be formed between the skin and the skin, and lateral leakage may occur.
Further, the standing length L ₄ is the case where more than 25mm, the reverse wrinkle contact is too deep to the skin is formed on undesirable because it can be horizontal leakage transmitted groove of the wrinkle.

The relationship between the first three-dimensional gathers 4 and the second three-dimensional gathers 5 is a width dimension from the inner side edge of the first three-dimensional gathers to the outer side edge of the second three-dimensional gathers. It is desirable that BG accounts for 15% or more, preferably 15 to 30%, of the product width B of the absorbent article. The width dimension B
When G / product width B is less than 15%, a sufficient space for retaining blood and the like formed by the first three-dimensional gathers 4 and the second three-dimensional gathers 5 is not sufficiently secured, and lateral leakage is effectively prevented. In addition to this, the degree of contact with the skin becomes shallow, and as a result, it becomes impossible to secure the cushioning property and the followability to the movement of the wearer.

The first three-dimensional gathers 4
Whether the adhesive length of the elastic elastic member 11 is equal to the adhesive length of the second elastic elastic member 12 provided in the second three-dimensional gather 5,
Preferably, the length is longer. Specifically, 0-40
It is desirable that the length be about mm. By increasing the bonding length of the first elastic expansion / contraction member 11, a force for bending the absorber 2 can be effectively applied.

As for the elastic strength, the elastic strength of the first elastic expandable member 11 provided in the first three-dimensional gather 4 is equal to the elastic strength of the second elastic expandable member 12 provided in the second three-dimensional gather 5. It is desirable to make it equal to or preferably stronger. This is also for effectively bending the absorber 2. Specifically, it is desirable that the elastic strength of the first elastic elastic member 11 is increased by 0 to 40% of the elastic strength of the second elastic elastic members 12 and 12.

In this embodiment, the formation of the double gathers includes the first three-dimensional gathers 4 and the second three-dimensional gathers 5.
Is formed from a single gather-formed nonwoven fabric 6, which is preferable from the viewpoint of operability since the cost cost is reduced and the number of parts is reduced.

When attaching such a sanitary napkin N to a local part of the body, as shown in FIG.
When applying the sanitary napkin N to a local part, the first three-dimensional gathers 4 and the second three-dimensional gathers 5 are both closely adhered to the body without forming a gap without twisting or wrinkling. Attach to In this case, the second three-dimensional gathers 5, 5 are attached so as to come into contact with the base positions of the legs at positions outside the shorts. The first three-dimensional gathers 4 and 4 block the leakage of menstrual blood and the like in the shorts so that they do not leak sideways, and a gap is formed between the skin due to lateral displacement and torsion.
Even if menstrual blood or the like leaks over the three-dimensional gathers 4 and 4, the second three-dimensional gathers 5 and 5 block the menstrual blood and prevent the shorts from becoming dirty.

In the sanitary napkin N, the first three-dimensional gathers 4 located inside are formed so as to protrude inward with the upper surface of the absorber side being the upright base point, in relation to the formation of the double three-dimensional gathers. And the second outside
The three-dimensional gathers 5 are formed so as to protrude outward from the liquid-impermeable back sheet 1 as a standing base point. As shown in the drawing, the first three-dimensional gathers 4 contact the crotch part with an inward inclination, and the second three-dimensional gathers 5 contact the crotch part with an outward inclination at the outer position. As a result, the first three-dimensional gathers 4 and the second three-dimensional gathers 5 have a wide space having a substantially V-shaped cross section, that is, a stagnation space P such as menstrual blood.
Is formed reliably. One of the second three-dimensional gathers 5 forming the stagnation space P is the liquid-impermeable sheet 1
Since the absorbent body 2 rises with the upright base point, even if the absorbent body 2 comes into close contact with the skin, the staying space P is not crushed and the spatial state is constantly maintained.

[0037]

As described in detail above, according to the present invention, lateral leakage of menstrual blood, vaginal discharge, etc. is reliably prevented by a double barrier (gather), and a function that can function effectively by both three-dimensional gathers. A retention space for blood or the like can be formed, and the longitudinal shape of the product can be maintained in a curved shape.

[Brief description of the drawings]

FIG. 1 is a developed plan view of a sanitary napkin N 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 line III-III in FIG. 1;

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 1;

FIG. 5 is a diagram schematically showing an enlarged form of a double three-dimensional gather.

FIG. 6 is a side view showing a product state of the absorbent article.

FIG. 7 is a mounting state diagram of the absorbent article.

FIG. 8 is a cross-sectional view showing a conventional absorbent article (conventional example 1).

FIG. 9 is a mounting state diagram thereof.

FIG. 10 is a cross-sectional view showing a conventional absorbent article (conventional example 2).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid impervious back sheet, 2 ... Absorber, 3 ... Liquid permeable top sheet, 4 ... 1st solid gather, 5 ... 2nd solid gather, 6 ... Gather formation nonwoven fabric, 7 ... Side emboss,
8 front emboss, 9 back emboss, 10 crepe paper, 11 first elastically expandable member, 12 second elastically expandable member

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B029 BD13 BD14 4C003 CA01 4C098 AA09 CC11 CC12 DD10 DD12 DD24 DD25 DD26 DD28

Claims (5)

[Claims] 1. An absorbent article having an absorbent body interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, wherein the absorbent article has side portions on both sides thereof. A pair of left and right first three-dimensional gathers formed so as to protrude inward with the upper surface position as an upright base point; and at a position outside the first three-dimensional gather, substantially from a side edge of the liquid-impermeable backsheet. A nonwoven fabric provided continuously, or formed by the nonwoven fabric and a liquid-impermeable backsheet, and protrudes outwardly with the side edge or upper surface position of the substantially liquid-impermeable backsheet as an upright base point. And a second three-dimensional gather formed on the absorbent article. 2. In the first three-dimensional gather and the second three-dimensional gather forming part, a width dimension from an inner side edge of the first three-dimensional gather to an outer side edge of the second three-dimensional gather is: The absorbent article according to claim 1, wherein the absorbent article occupies 15% or more of the product width of the absorbent article. 3. The absorbent article according to claim 1, wherein the length of the first three-dimensional gather from the standing base point to the free standing end is 2 to 8 mm. 4. The elastic stretch member disposed along the longitudinal direction of the absorbent article at the tip of the first three-dimensional gather has a stretch ratio of 130 to 200% and an elastic strength of 5 to 30 gf. The absorbent article according to any one of the above. 5. The absorbent article according to claim 1, wherein the length of the second three-dimensional gather from the standing base point to the free standing end is 4 to 25 mm.