JP4719735B2 - Interlabial pad manufacturing equipment - Google Patents

Description

  The present invention relates to a method and apparatus for manufacturing a sanitary absorbent article with a mini-sheet piece that facilitates wearing, and a sanitary absorbent article manufactured by the manufacturing method. The present invention relates to a method for manufacturing an interlabial pad that can be easily attached to a device, an apparatus therefor, and an interlabial pad manufactured by the method.

  Conventionally, sanitary napkins and tampons are generally used as feminine sanitary products. Here, with respect to sanitary napkins, great efforts have been made to prevent menstrual leakage from gaps caused by poor adhesion to the vicinity of the vaginal opening. Also in the tampon, due to the attributes of the article, foreign matter feeling and discomfort at the time of wearing and difficulty in wearing in the vagina are caused, and therefore, great efforts have been made to remove these.

  Under such circumstances, as a sanitary product positioned in the middle of a sanitary napkin or a tampon, a sanitary product as an interlabial pad has recently been attracting attention. This interlabial pad is a part of the labia that is inserted between the labia and abuts against the inner surface of the labia, and is more adhesive than the sanitary napkin. It is hygienic and clean in order to prevent leakage and prevent menstrual blood from spreading and coming into wide contact with the body. Moreover, since it is smaller than a sanitary napkin, it is comfortable and comfortable to wear, and has a characteristic that psychological resistance when worn is lower than a tampon inserted into the vagina.

  By the way, as a manufacturing method of a sanitary napkin, a manufacturing method is generally known in which a front surface material and a back surface material are supplied, an absorber is supplied so as to enter between them, and these are bonded together. For example, JP-A-8-215242 discloses a method for producing a sanitary napkin further provided with an elastic body.

  In such a conventional method for manufacturing a sanitary napkin, a flat napkin can be manufactured, but there is a problem that a part that must be three-dimensionally attached by bending the napkin cannot be attached.

  The present invention has been made in view of the problems as described above, and in the sanitary absorbent article, a process for attaching parts that need to be applied in a three-dimensional manner is incorporated, and a physiological process is integrated from a raw material through a series of processes. The object is to provide a method for manufacturing an absorbent article for use, an apparatus for the same, and a sanitary absorbent article prepared by the method.

  That is, a sanitary absorbent article is manufactured in which an absorbent body is interposed between the front surface side sheet material and the back surface side sheet material, and a mini sheet piece is attached to the opposite side (so-called outer side) of the back surface side sheet material. In the method, an assembly step of assembling the front side sheet material and the back side sheet material so that the absorbent body is embedded to form a main part of the sanitary absorbent article, and the main part is substantially V-shaped in cross section After the sheet is folded in two, the mini sheet piece is placed on the surface that spreads in a brim shape that is formed by bending back and forth from a substantially straight bent part in the longitudinal direction so that the cross section is substantially T-shaped. Attaching mini-sheet attaching step, an adhesive fixing step for adhering and fixing them, and a continuous folding that forms an absorbent article continuous body folding structure by closing the surface that expands in a brim shape so that the cross-section becomes substantially V-shaped again A sanitary absorbent article comprising: a folding step; and a round cut step of cutting off unnecessary portions outside the peripheral edge of the absorbent article continuous body folding structure and further separating the individual absorbent articles. A manufacturing method, a manufacturing apparatus thereof, and a sanitary absorbent article made by the manufacturing method are provided.

  More specifically, the present invention provides the following.

(1) The front-side sheet material, the back-side sheet material , the absorber interposed between the front-side sheet material and the back-side sheet material, and the absorber among the front and back surfaces of the back-side sheet material In a manufacturing apparatus of an interlabial pad provided with a mini-sheet provided on a surface opposite to the disposed surface , the absorbent body is interposed between the front-side sheet material and the back-side sheet material. coating and supplying surface material supply device, respectively, an adhesive on at least part of the portion contacting to the surface side sheet member and / or the a part of the back side sheet material both the sheet material is bonded to the A surface material coating device to be worked, an absorber supply device for supplying the absorber so as to be interposed between the front surface side sheet material and the back surface side sheet material, the front surface side sheet material and the back surface side sheet the labia assembled and with product the absorber And assembling device for forming a main portion of the pad, the mini sheet anda mini sheet mounting device attached to the opposite surface of the back side sheet material, the surface material supply device, the surface side sheet material And a front surface material roll and a back material roll that supply the back side sheet material, respectively, on the opposite side in the vertical direction with respect to the assembling device, and the mini sheet mounting device is a mini that supplies the mini sheet. An apparatus for producing an interlabial pad , wherein a sheet original fabric roll is arranged on the same side as the back material original fabric roll in a vertical direction with respect to the assembly apparatus.

  Here, the surface material roll is a material of a surface sheet of a sanitary absorbent article to be a product, and is cut at a substantially right angle or a predetermined angle with respect to a continuous direction, so that a plurality of sanitary absorptive rolls are obtained. The roll which wound up the continuous body which can cut out the surface sheet used for articles | goods may be sufficient. Similarly, a back material roll is a material for a back sheet of a sanitary absorbent article to be a product, and is cut at a substantially right angle or a predetermined angle with respect to a continuous direction, thereby a plurality of sanitary absorbent materials. The roll which wound up the continuous body which can cut out the back surface sheet used for articles | goods may be sufficient. Arranging these rolls on the opposite side in the vertical direction with respect to the assembly device means that the assembly device for assembling the absorber is interposed between the front surface side sheet material and the rear surface side sheet material at the center, The upper surface material roll may be disposed on the upper side, and the lower surface material roll may be disposed on the lower side, or an absorber may be interposed between the front side sheet material and the back side sheet material in the center. It is also possible to arrange an assembling apparatus for assembling so as to assemble, arrange a back surface material roll on the upper side, and arrange a surface material roll on the lower side. With such an arrangement, an empty space of the assembling apparatus can be used effectively, and the sanitary absorbent article manufacturing apparatus can be made compact.

  ADVANTAGE OF THE INVENTION According to this invention, the vacant space of an assembly apparatus can be used effectively and the manufacturing apparatus of the said sanitary absorbent article can be made compact.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Before describing a method for manufacturing an interlabial pad according to the present invention, an interlabial pad provided by the manufacturing method will be described. That is, the present invention relates to how to mass-produce the interlabial pad as described later.

[Basic structure of interlabial pad]
FIG. 1 is a longitudinal sectional view showing an internal configuration of the interlabial pad 1 according to the present embodiment, and FIG. 2 is a plan view of FIG. 1 showing a body side surface of the interlabial pad 1 according to the present embodiment. 3 is an external perspective view showing an anti-body side surface of the interlabial pad according to the present embodiment, FIG. 4 is a sectional view taken along line XX of FIG. 3, and FIG. FIG. 6 and FIG. 7 are explanatory views showing the usage state of the interlabial pad of the present embodiment. FIG. 6 and FIG. 7 are schematic sectional views showing a cross section in the short direction of the interlabial pad 1 for explanation.

  As shown in FIG. 1, the interlabial pad 1 of the present embodiment includes a front side sheet 11 (body side) of a water permeable material, a back side sheet 12 (antibody side) of an impermeable material, and an absorber 13. The front surface side sheet 11 and the back surface side sheet 12 are formed by integrally joining the front surface side sheet 11 and the back surface side sheet 12 at the peripheral edge portion 15 so as to confine the absorber 13. It has become. The joining of the front side sheet 11 and the back side sheet 12 is layered by melt-type adhesion by heat embossing and / or hot-melt type adhesive. Moreover, in order to prevent the interlayer separation with respect to the surface side sheet | seat 11 and the back surface side sheet | seat 12, the absorber 13 is the state stuck on at least any one.

  In addition, the said surface side sheet | seat 11 and the back surface side sheet | seat 12 can also prevent the said interlayer separation by making it a sticking state in the inner edge part except the peripheral part 15. FIG. In addition, interlayer separation tends to occur when wet, but heat embossing type adhesion is more preferable in order to prevent this. In this regard, the heat embossing type adhesive has a dot-like / screen pattern-like pattern and can be used without limitation, and the embossed area ratio is 3 to 20%, thereby preventing liquid permeation. It is possible to maintain the wet strength without any problems.

  As shown in FIG. 3, on the opposite body side surface 12a of the back side sheet 12, a mini sheet piece 14 covering about two-thirds of the back side sheet 12 is an outer edge portion 17 excluding the finger insertion port 19a. Are attached to form a pocket 16. Specifically, the center dimension in the longitudinal direction of the absorbent layer 2 is 85 mm, whereas the center dimension in the longitudinal direction of the mini sheet piece 14 is approximately 55 mm, and the back side sheet 12 is approximately 30 mm in the longitudinal direction. In the range, it has the area | region of the state in which the mini sheet piece 14 is not coat | covered.

  FIG. 4 is a diagram for specifically explaining “the total perimeter of the inside of the finger insertion port 19a”. Here, “the total perimeter of the inside of the finger insertion port” refers to FIG. It is the distance of the arrow line shown by the inside code | symbol "L", and the length of the "L" is about 40 mm in this embodiment.

  Since FIG. 4 is a schematic cross-sectional view, the dimensional relationship of each component is different from the actual one for convenience of explanation, such as the thickness of a joint portion 17 to be described later being significantly different from the actual dimension. Different.

  As shown in FIG. 5 (A), the peripheral portion 15 that is the joining portion of the front surface side sheet 11 and the back surface side sheet 12, and the joint portion 17 of the mini sheet piece 14 at the same position in the thickness direction of the peripheral edge portion 15. When positioned and fixed, the portion of the peripheral edge portion 15 becomes hard, and the wearing feeling of the interlabial pad 1 is hindered.

  About this, as shown to FIG. 5 (B), it can avoid by arrange | positioning the junction part 17 other than the thickness direction part of the peripheral part 15, and fixing the mini sheet piece 14. As shown in FIG. However, as shown in FIG. 5 (B), when the joining portion 17 is positioned outside the portion of the peripheral edge portion 15, as shown in FIG. 5 (C), the joining portion 17 is joined according to the wearer's movement. It is considered that there is a possibility that the portion 17 moves and the moving joint portion 17 and the human body rub against each other and give a stimulus to the wearer. For this reason, in implementation, as shown in FIG. 5D, the peripheral portion 15 and the joint portion 17 are displaced in the thickness direction, and the joint portion 17 is located inside the peripheral portion 15. Is preferably arranged.

  By inserting a fingertip into the pocket 16 composed of the back surface side sheet 12 and the mini sheet piece 14, as shown in FIG. 6, the fingerprint surface side of the first joint of the finger faces the opposite body surface 12a of the back surface sheet 12. Can be inserted in contact with.

  Here, the non-body side surface 12a exposed to the outside without being covered with the mini sheet piece 14 is formed of a series of back side sheets 12 through the inside and outside of the pocket 16, so that the finger to be inserted into the pocket 16 is inserted. When inserting, the said anti-body side surface 12a acts as a finger insertion guide part. In other words, the wearer applies a finger to the external body side 12a exposed to the outside and acts as the finger insertion guide, and is formed by the mini-sheet piece 14 and the anti-body side surface 12a covered with the mini-sheet piece 14. By sliding the finger toward the finger insertion opening 19a of the pocket 16, the use state shown in FIG. 6 can be achieved by a simple operation as if a hand is inserted into the pocket.

  The front side sheet 11 and the back side sheet 12 are joined at the peripheral edge 15 of both sheets 11 and 12 to seal the absorbent body 13, and the integrally formed absorbent layer 2 is attached to the pocket 16. With the fingertips in contact with the opposite body surface 12a of the back sheet 12, the flexibility of the fingertip allows the user to feel the unevenness of the labial portion of the body to which the front sheet 11 is applied. I have. Compared to what is expected to be formed of a relatively hard material for the purpose of maintaining a three-dimensional shape as in the conventional special table 2001-509402, this point is to be worn at an appropriate position by groping. Becomes easy. In other words, as shown in FIG. 6, the interlabial pad is inserted as shown in FIG. 7, with the fingerprint surface side of the first joint of the finger in contact with the opposite body side surface 12a of the back sheet 12. When 1 is guided to the labia 18, the body side surface 11 a of the surface side sheet 11 is brought into contact with the labia 18, and the unevenness of the labia 18 can be sensed by the belly of a sensitive finger to be guided more accurately in the concave labia 18. .

  Further, when removing the absorbent layer 2 from the labia, as in the case of wearing, the finger is placed on the external body side surface 12a exposed to the outside that acts as the finger insertion guide, and the mini sheet piece 14 and the mini sheet piece 14 The finger is inserted into the pocket 16 by a simple operation such as inserting a hand into the pocket by sliding the finger toward the finger insertion opening 19a of the pocket 16 formed by the anti-body side surface 12a covered with It is possible to remove easily without getting your hands and fingers dirty.

  That is, as shown in FIG. 6, the interlabial pad 1 is inserted as shown in FIG. 7, with the fingerprint side of the first joint of the finger in contact with the opposite body side surface 12a of the back side sheet 12. When guiding to the labia, the body side surface 11a of the surface side sheet 11 is brought into contact with the labia 18 and the unevenness of the labia 18 can be sensed by the sensitive belly of the labium 18 to be guided more accurately in the concave labia 18.

  As shown in FIG. 8, the mini sheet piece 14 has a length in a range of 10% or more in the longitudinal direction with respect to the absorbent layer 2 and is biased in the longitudinal direction of the back surface side sheet 12. By being provided at the position, it can be clarified that the insertion direction of the finger is the direction of A. In this sense, “the length of 10% or more of the mini sheet piece 14” plays a role of implying the insertion direction of the finger in the interlabial pad 1 according to the present invention.

  Further, as shown in FIG. 8, the second non-joining portion 19b at a position facing the finger insertion port 19a, which is the first non-joining portion, in which the mini sheet piece 14 and the back side sheet 12 are not joined, is provided. If the back side sheet 12 is joined to the non-body side surface 12a, as shown in FIG. 9A, the wearer's fingertips are completely hidden in the second non-joined portion 19b, as shown in FIG. The fingertip is not exposed and is hygienic.

  Note that Japanese National Publication No. 6-506368 discloses a urinary incontinence prevention pad provided with a bag-like finger insertion hole on the surface opposite to the body side. `` It is in a collapsed state but expands when a finger is inserted '', so the insertion hole is normally closed and if you do not point your finger in a direction perpendicular to the urinary incontinence prevention pad, Disadvantages in the use state where it is impossible to insert a finger into the insertion hole or it is necessary to forcefully insert the finger into the collapsed linear finger insertion slot There is.

  In other words, as in this embodiment, the finger is placed on the external body side 12a exposed to the outside that acts as the finger insertion guide, and formed by the mini-sheet piece 14 and the anti-body surface 12a covered with the mini-sheet piece. Compared with the case where the finger can be inserted into the pocket 16 by a simple operation such as inserting a hand into the pocket by sliding the finger toward the finger insertion opening 19a of the pocket 16 to be inserted, It is difficult to carry out in a groping state, and a problem that it is necessary to insert a finger aiming at the insertion hole to be inserted into the insertion hole can be predicted.

<Dimension of interlabial pad>
The length in the short direction of the interlabial pad 1 is preferably 10 to 60 mm, more preferably 30 to 50 mm. In this case, when the length is longer than 60 mm, the wearer's thigh and the edge of the interlabial pad 1 come into contact with each other, and friction is generated between the two each time the wearer moves. When the frictional force exceeds the force of the labium itself holding the interlabial pad 1, the interlabial pad 1 may fall off from between the labial areas. When the length is shorter than 10 mm, the interlabial pad 1 cannot have a sufficient area and volume so that the interlabial pad 1 can be interposed between the labia, and the interlabial pad 1 tends to fall off.

  The length of the interlabial pad 1 in the longitudinal direction is preferably 60 to 150 mm, more preferably 80 to 120 mm. In this case, if the length is longer than 150 mm, the contact surface between the anti-body surface of the interlabial pad 1 and the underwear is too large, and a frictional force stronger than the holding force of the interlabial pad 1 by the labium itself is generated. The interlabial pad 1 may fall off. On the other hand, if it is shorter than 60 mm, the interlabial pad 1 cannot have a sufficient area and volume so that it can be interposed between the labia, and the interlabial pad 1 tends to fall off.

  The thickness of the interlabial pad 1 is preferably 0.5 to 20 mm, more preferably 2 to 10 mm. Since the interlabial pad 1 is mounted between the sensitive labia, if the thickness is 20 mm or more, the wearer will feel a foreign object when worn. On the other hand, in the case of 0.5 mm or less, the capacity of the contained absorbent body tends to be insufficient for absorption of menstrual blood, and menstrual blood may ooze out from the interlabial pad 1.

  For the water-permeable sheet disposed on the body side of the interlabial pad, a material that is liquid hydrophilic and does not irritate the skin is used. Examples of such materials include meltblown, spunbond, pointbond, through air, pointbond, needle punch, wet, wet spunlace, nonwoven fabric obtained from a production method such as foam film, or a combination of these. It is done.

[Component material of interlabial pad]
<Water-permeable sheet>
For the water-permeable sheet disposed on the body side of the interlabial pad, a material that is liquid hydrophilic and does not irritate the skin is used. Examples of such materials include meltblown, spunbond, pointbond, through air, pointbond, needle punch, wet, wet spunlace, non-woven fabric obtained from a production method such as foam film, or a combination of these. It is done. In addition, examples of the fibrous sheet include those in which fibers made of rayon, acetate, cotton, pulp, or synthetic resin are used alone or in combination to form a core-sheath structure alone or mixed into a sheet. .

  Among these materials, considering liquid mobility from the inner surface of the labia and chemical stimulation by the active agent, fibers mixed with natural cotton 5-30%, rayon or acetate 70-95%, 20-20% A spunlace nonwoven fabric that is adjusted in the range of 50 g / m2, then entangled with each other by hydroentanglement and dried to adjust the thickness in the range of 0.3 to 1.0 mm is preferable. The yarn quality used in this case is selected from the range of 2.2 to 6.6 dtex, in the range of 15 to 60 mm for natural cotton, in the range of 25 to 51 mm for rayon or acetate.

<Absorber>
As a material used for the absorber, pulp, chemical pulp, rayon, acetate, natural cotton, polymer absorber, fibrous polymer absorber, and synthetic fiber can be used alone or a mixture thereof.

  As the sheet-like material, these may be used after being processed into a sheet-like or powdery form, and are not limited to the method of use.

  The absorbent body only needs to be capable of absorbing and retaining a liquid (body fluid), but is preferably bulky, hardly deformed, and has little chemical irritation. Specifically, fibers laminated with rayon or acetate selected from the range of 1.1 to 4.4 dtex at a mixing ratio of 60 to 90% and fibrous polymer absorber 10 to 40% are entangled by needling, A nonwoven fabric sheet having a sheet weight per unit area of 150 to 500 g / m 2 and a bulk of 2 to 5 mm is exemplified.

  When the absorbent body as described above is incorporated into the interlabial pad, it can be appropriately adjusted by adjusting the bulk, overlapping, folding or the like as necessary.

<Impermeable sheet>
As the material of the water-impermeable sheet used for the interlabial pad, a material that can prevent menstrual blood held in the absorbent body from leaking out of the interlabial pad can be used. In addition, by using a moisture-permeable material, it is possible to reduce stuffiness at the time of wearing, and to reduce discomfort at the time of wearing.

  Examples of such a material include a sheet-like film formed from a synthetic resin, a breathable film obtained by filling an inorganic filler and stretching, paper, a laminate of a nonwoven fabric and a film, 10-30 For example, an air-permeable liquid blocking sheet obtained by disposing the capillary so as to face the absorbent body within a range of 0.1 to 0.6 mm in pore diameter can be used.

  Furthermore, when considering the flexibility that does not impair the feeling of wearing, for example, the basis weight is 15 to 30 g / m 2 mainly composed of low density polyethylene (LDPE) resin having a density of 0.900 to 0.925 g / cm 3. It is preferable to use a film obtained from the range.

<Mini sheet piece>
The mini sheet piece may be made of the same material as the water-permeable sheet or the water-impermeable sheet described above, but it is preferable to use a material that has at least a stretchability or stretchability in the lateral direction.

  By using such a material for the mini sheet piece, even if the wearer's fingertip size is larger than the set finger insertion port, the mini sheet piece is at least in the width direction according to the finger size. Therefore, the interlabial pad according to the present invention can be effectively used regardless of the wearer's fingertip size.

  Examples of the originally stretchable material include styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), synthetic rubber such as urethane, 0.88-0. Examples include a film made of an amorphous olefin resin selected from a density of 900 g / cm 3, a perforated foam film, a net, and the like. Further, a woven fabric or a fabric in which a spun filament made of synthetic rubber is used as a raw material can be used. Furthermore, a spunbond nonwoven fabric, a meltblown nonwoven fabric, and a foamed foam sheet mainly composed of synthetic rubber can also be used.

  In consideration of the flexible texture during wearing, the thickness is adjusted to 15 to 40 microns, the hole area is 0.28 to 1.77 mm2, and the open area ratio is 40 to 70%. And an open-hole foam form made of SEBS as a raw material.

  As the nonwoven fabric, composite synthetic fibers such as PE / PP, PE / PET, PP / PP, etc. having heat-shrinkability, in which the core component is composed of a high melting point and the sheath component is composed of a low melting point component, are used as raw materials. Spunlace nonwoven fabric entangled, shrink-type nonwoven fabric that has been treated with reheated air to promote fiber shrinkage, so-called stretchable span that has been subjected to tentering in the longitudinal direction after continuous long fibers are formed into a sheet by heat sealing Bond etc. are mentioned.

  More specifically, it has a heat shrinkability in which the thickness is in the range of 2.2 to 6.6 dtex, the length is in the range of 38 to 51 mm, the core component is composed of a high melting point, and the sheath component is composed of a low melting point component. A shrink-type nonwoven fabric that is made of composite synthetic fibers such as PE / PP, PE / PET, and PP / PP and has a basis weight adjusted to a range of 20 to 60 g / m 2 is a suitable material that is flexible and rich in drape. Can be mentioned. Also, laminates of the materials as described above can be used.

  When using a non-extensible material with extensibility, PE / PP, PE / PET having a heat shrinkability in which the core component is composed of a high melting point and the sheath component is composed of a low melting point component from the nonwoven fabric. A bulky through-air nonwoven fabric made of composite synthetic fiber such as PP / PP, treated with hot air, spunlace nonwoven fabric in which fibers are entangled with water pressure, spunbond nonwoven fabric in which continuous fibers are laminated into a sheet, needle In addition to needle punched nonwoven fabric in which fibers are entangled with each other, SMS nonwoven fabric in which spunbond and meltblown are laminated in multiple layers, a perforated foam film, a film mainly composed of PE resin, etc. alone or in combination The material which consists of.

  It is also possible to provide extensibility by corrugating by fitting the material as described above between male and female molds and embossing the shape by heat, temperature and pressure. More specifically, a through-air nonwoven fabric mainly composed of composite synthetic fibers with a thickness in the range of 2.2 to 4.4 dtex and a basis weight in the range of 20 to 60 g / m2 can be stretched in the lateral direction. The thing which gave corrugated processing is mentioned. The corrugating process has an extensibility of at least 10% or more, more preferably an arrangement of male and female molds so that the extensibility is in the range of 20 to 50%, more preferably 30% It is desirable that the load at the time of extension has a behavior in the range of 0.01 to 0.05 N / 25 mm (test conditions: Tensilon tensile tester, speed 100 mm / min, chuck interval 100 mm).

  As another method for imparting extensibility, a method of cutting a cut line or a circle can be used.

<Adhesive>
Examples of the adhesive that can be used include an aqueous polymer, a crosslinking agent, a plasticizer, and a gel adhesive composed of moisture. More specifically, examples of the aqueous polymer include gelatin, sodium polyacrylate, polyvinyl alcohol, carboxymethyl cellulose and the like, and water-soluble metal salts such as calcium chloride and magnesium sulfate are generally used as the crosslinking agent. Examples of the plasticizer include glycerin, wax, and paraffin.

  In addition, a pressure-sensitive hot melt pressure-sensitive adhesive can also be used as a pressure-sensitive adhesive for forming the pressure-sensitive adhesive part. The pressure-sensitive hot melt pressure-sensitive adhesive is mainly composed of synthetic rubber resins such as SIS, SBS, styrene-ethylene-butadiene-styrene block copolymer (SEBS), and styrene-ethylene-propylene-styrene block copolymer (SEPS). And a tackifier such as terpene resin or rosin resin and a plasticizer such as wax are melted and mixed therewith.

  Furthermore, a silicone resin pressure sensitive adhesive can also be used. Silicone resin-based adhesive is a mixture of silicone resin and fluororesin as main components, mixed with cross-linking agents such as metal salts such as platinum, molybdenum and antimony, plasticizers such as ester wax, glycerin and machine oil. Etc.

  As described above, there are many types of pressure-sensitive adhesives for forming the pressure-sensitive adhesive part, but it is preferable to use a pressure-sensitive hot melt pressure-sensitive adhesive in consideration of coating stability. Examples of the pressure-sensitive hot melt pressure-sensitive adhesive having high coating stability include those obtained by melt-mixing 15 to 25% by weight of SEBS, 15 to 35% by weight of a plasticizer, and 40 to 70% by weight of a tackifier. About this pressure-sensitive hot melt pressure-sensitive adhesive, an antioxidant, an anti-fluorescent agent, etc. may be added in the range of 0.1 to 1.0% by mass.

  In addition, it is preferable to coat | cover the adhesion part with the sheet | seat which coats a silicone resin to the thin paper generally used as a release paper, or the sheet | seat which coats a silicone resin to a plastic film. By doing so, it is possible to prevent the adhesive portion from being soiled or peeled off during storage.

[Composition of interlabial pad with biodegradability, water dispersibility, and water solubility]
The interlabial pad of the present invention is preferably composed of a biodegradable material and / or a water-dispersible material and / or a water-soluble material. This is because such an interlabial pad can be dropped and flushed in the toilet after use, so that the pad can be discarded easily and cleanly, and the dust in the toilet can be reduced.

  In the present specification, “biodegradable” means that a substance such as carbon dioxide or methane is present under anaerobic or aerobic conditions in the presence of bacteria such as actinomycetes or other microorganisms in accordance with natural processes. The biodegradability (biodegradation rate, biodegradability, etc.) of the substance is generally recognized as a naturally occurring material such as fallen leaves or biodegradability in the same environment. Comparing with synthetic polymer. “Water dispersibility” means the same as water disintegration, and there is no effect with a limited amount of water (menstrual blood) at the time of use, but in a large amount of water or water stream, fibers are at least general This means that it is easily dispersed into small pieces that do not clog the toilet piping. “Water-soluble” refers to the property of being soluble in a large amount of water or water stream, although it is not affected by a limited amount of water (menstrual blood) at the time of use.

<Water-permeable sheet>
As a material that can be used for the water-permeable sheet, in addition to the spunlace nonwoven fabric, a wet spunlace nonwoven fabric having a fiber length selected from a range of 1 to 15 mm can be used. As other materials, biodegradable resins by hydrolysis such as polylactic acid and polybutylene succinate can also be used. For example, a melt-blown nonwoven fabric prepared using polylactic acid as a raw material with a basis weight adjusted in the range of 20 to 60 g / m2, a basis weight adjusted in the range of 15 to 30 g / m2, and a fiber thickness adjusted in the range of 1.1 to 3.3 dtex. Spunbond nonwoven fabrics that have been made. Each nonwoven material may or may not be subjected to a hole opening treatment.

  As other materials, acetate or synthetic fiber can be used alone or by adjusting tow, which is a continuous fiber of a laminated body, in a range of 50 to 300 g / m 2 in basis weight and defibering the fibers.

<Absorber>
As a material that can be used for the absorbent body, a nonwoven fabric sheet obtained by needling can be used. In view of biodegradability of the polymer absorbent material, it is preferable to use carboxymethyl cellulose fiber.

<Impermeable sheet>
Examples of materials that can be used for the water-impermeable sheet include a PVA film, a film sheet that has been subjected to water repellent treatment on one or both sides of the PVA film, or a silicone, a PVA film mixed with silicone, a starch film, a polylactic acid, or A laminated paper with a film, tissue or the like using a biodegradable resin by hydrolysis such as polybutylene succinate as a raw material can be used. If necessary, an inorganic pigment may be mixed within a range of 0.1 to 5% for coloring.

  In consideration of maintaining leakproofness under excessive humidity and not giving an excessive load to the purification layer, a film made of polylactic acid as a raw material has a basis weight of 15 to 20 g in a thickness range of 10 to 20 microns. A laminate paper laminated with a tissue selected from the range of / m2 and further provided with a bonding area ratio of 5 to 40% at the time of lamination is preferable.

<Mini sheet piece>
As materials that can be used for the mini sheet pieces, films made from biodegradable materials such as polylactic acid and polybutylene succinate, spunbond nonwoven fabrics, meltblown nonwoven fabrics, or water-soluble materials such as PVA and CMC are used as raw materials. Examples thereof include films, nonwoven fabrics, water dispersible tissues mainly composed of cellulose fibers, regenerated cellulose fibers, etc., spunlace nonwoven fabrics, and the like.

  Preferably, the sheet is a spunbond nonwoven fabric or meltblown nonwoven fabric mainly composed of biodegradable material, the thickness of which is adjusted in the range of 0.1 to 3.3 dtex and the basis weight is adjusted in the range of 15 to 40 g / m2. Therefore, it can be obtained by applying a mechanical corrugating process.

  By providing the following as the new interlabial pad 1 as described above, it is possible to put the finger on the finger guide part and attach / detach the interlabial pad 1 to / from the body through the finger insertion opening 19a. It is possible to make it possible to carry out with easy work while reducing the above. That is, “the absorbent layer 2 formed by enclosing an absorbent body 13 that absorbs bodily fluid between a water-permeable surface-side sheet 11 for contact with the body side and a back-side sheet 12 disposed to face the surface-side sheet 11. In the interlabial pad 1 provided, the absorbent layer 2 has a substantially elongated shape in plan view, and a part or all of the absorbent layer 2 can be sandwiched between the labia of the body to obtain a holding force. A finger having a size, weight, and flexibility, and having a finger insertion opening 19a for attaching / detaching the absorbent layer 2 to / from the body on a part of the non-body side surface 12a of the absorbent layer 2. A pocket 16 is provided as a fixing means, and the non-body side surface 12a of the absorbent layer 2 where the pocket 16 is not provided is exposed to the outside, and the exposed anti-body side surface 12a of the absorbent layer 2 is exposed to the outside. When inserting a finger into the finger insertion opening 19a , It is possible to provide an interlabial pad "that characterized in that for guiding the finger to the finger insertion opening 19a.

  The interlabial pad 1 described above can be manufactured through the following manufacturing process.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Before describing a method for manufacturing an interlabial pad according to the present invention, the interlabial pad provided by the manufacturing method will be briefly summarized.

  By providing the following as the new interlabial pad 1 as described above, it is possible to put the finger on the finger guide part and attach / detach the interlabial pad 1 to / from the body through the finger insertion opening 19a. It is possible to make it possible to carry out with easy work while reducing the above. That is, “the absorbent layer 2 formed by enclosing an absorbent body 13 that absorbs bodily fluid between a water-permeable surface-side sheet 11 for contact with the body side and a back-side sheet 12 disposed to face the surface-side sheet 11. In the interlabial pad 1 provided, the absorbent layer 2 has a substantially elongated shape in plan view, and a part or all of the absorbent layer 2 can be sandwiched between the labia of the body to obtain a holding force. A finger having a size, weight, and flexibility, and having a finger insertion opening 19a for attaching / detaching the absorbent layer 2 to / from the body on a part of the non-body side surface 12a of the absorbent layer 2. A pocket 16 is provided as a fixing means, and the non-body side surface 12a of the absorbent layer 2 where the pocket 16 is not provided is exposed to the outside, and the exposed anti-body side surface 12a of the absorbent layer 2 is exposed to the outside. When inserting a finger into the finger insertion opening 19a , It is possible to provide an interlabial pad "that characterized in that for guiding the finger to the finger insertion opening 19a.

  The interlabial pad 1 described above can be manufactured through the following manufacturing process.

[Steps of First Manufacturing Method]
A first manufacturing method of the interlabial pad 1 which is one embodiment of the present invention will be described with reference to FIG. This first manufacturing method is:
a) A front-side sheet continuous member 110 in which a material that becomes the front-side sheet 11 located on the body side in the mounted state is continuous, and a back-side sheet continuous member 120 in which a material that becomes the back-side sheet 12 located on the opposite side is continuous. And a step of superposing so as to enclose the absorber 13;
b) Adhesive or the like for a part or all of the side (the side facing the non-body side) of the mini sheet piece continuous member 140, which is continuous with the material to be the mini sheet piece 14, facing the back surface side sheet continuous member 120. A temporary fixing means is applied, cut to a predetermined length on a roll with suction 143 and separated into a plurality of mini-sheet pieces 14, and the mini-sheet pieces 14 are separated from the back-side sheet continuous member 120 from the roll with suction 140. B process to transfer and paste on the body side;
c) Absorber 13, surface-side sheet continuous member 110 and back-side sheet continuous member 120, or top-side sheet continuous member 110, back-side sheet continuous member 120, and mini-sheet piece 14 excluding absorber 13 C process which mutually joins at the periphery of absorber 13 and forms continuous absorption layer 200,
d) A d step of providing a predetermined width from the absorber 13 and cutting an unnecessary portion of the peripheral edge portion 15 to form an outer contour of the interlabial pad 1.

  Hereinafter, the manufacturing process of 1st Embodiment is demonstrated concretely. FIG. 10 is a diagram showing a series of manufacturing steps of the interlabial pad 1.

[Step a]
First, the raw material supply process will be described. The surface-side sheet continuous member 110 is unwound from the original roll 110 </ b> A, passes through the meandering correction device 111, and then sent to the hot melt adhesive application device 112. After the hot melt adhesive is continuously applied by the application device 112, the surface side sheet continuous member 110 is fed so as to pass over the roll 113.

  On the other hand, the back surface side sheet continuous member 120 is unwound from the original roll 120 </ b> A, passes through the meandering correction device 121, and then sent to the hot melt adhesive application device 122. After the hot melt adhesive is continuously applied by the application device 122, the back surface side sheet continuous member 120 is sent so as to pass under the roll 123.

  The continuous absorbent body 130 is unwound from the raw roll 130 </ b> A and cut into individual absorbent bodies 13. Then, it is sent between the rolls 113 and 123.

  In step a, the backside sheet continuous member 110 and the absorber 13 are integrally formed by previously applying a hot-melt adhesive on the side where the backside sheet continuous member 120 and the absorber 13 face each other. Means to do this may be provided. Similarly, by applying a hot melt adhesive in advance on the side where the surface side continuous sheet member 100 and the absorbent body 13 face each other, the surface side sheet continuous member 100 and the absorbent body 13 face each other. Means for integrally forming the sheet continuous member 110 and the absorber 13 may be provided.

  The above-described hot melt adhesive is generally used as a so-called hot melt applicator. Specifically, the hot melt melted by heating in a melting tank (not shown) is pumped to the supply hose by various pumps such as a gear pump and a plunger pump, and sent into the manifold. Is applied from a nozzle having a predetermined shape. In this case, the hot melt application pattern may be arbitrarily selected from linear, planar, spiral, Ω, spray, and mesh, and is a pressure sensitive type heated in the range of 120 ° C to 180 ° C. Hot melt is applied in the range of 1 to 10 g / m 2.

  Moreover, in suitable embodiment, it is preferable that the absorber 13 is not inserted | pinched in the peripheral part 15 to which the surface side sheet | seat 11 and the back surface side sheet | seat 12 join. In order to do this, for example, only the front side sheet 11 and the back side sheet 12 are joined, and then the absorber 13 is confined in a bag-like shape surrounded by the joint part at the peripheral part. In this regard, when the absorber 13 is sandwiched and joined to the peripheral edge portion 15, the peripheral edge portion 15 becomes hard. In this embodiment, as described above, the absorber 13 is By avoiding pinching at the peripheral edge 15 to be joined, it is avoided that the peripheral edge 15 becomes hard, and the wearing feeling is more suitable.

  The size of the absorbent body 13 may be the same as that of the interlabial pad 1, and 2 to 2 from the outermost contour of the interlabial pad 1 in order to prevent the absorbent body 13 from being sandwiched between the peripheral edges 15. It is good also as a dimension reduced so that the space | interval of the range of 10 mm may be provided.

[Step b]
Next, the attachment process of the mini sheet piece 14 will be described.

  In step b, the mini-sheet piece continuous member 140 is unwound from the original roll 140A, passes through the meandering correction device 141, is sent to the hot melt coating device 142, and is coated with the hot melt adhesive. By applying suction pressure by suction to the roll with suction 143 provided with a plurality of holes from the inside, it is held on the roll with suction 143 and is kept in this state by a cut roll provided with a cutting blade. Cut it.

  The mini-sheet piece 14 cut to a predetermined length is transferred to the back-side sheet continuous member 120 side and bonded together with the adhesive applied earlier. At this time, in order to prevent wrinkles from occurring in the finished product, the speed at which the continuous absorbent layer 220 is conveyed and the speed at which the cut mini-sheet pieces 14 are dropped are the same. By providing this step, a finger insertion opening 19a for inserting a finger is formed between the back sheet 12 and the mini sheet piece 14.

  As the hot melt, a pressure-sensitive hot melt is used, and in order to stabilize the width of the finger insertion port 19a, a coating pattern such as a stripe shape, a linear shape, or an Ω shape is preferable, and a range of 140 to 180 ° C. In this way, the ones adjusted in the range of 5 to 100 g / m 2 are applied to the left and right sides with an interval for forming the finger insertion opening 19a.

[Process c]
Next, the adhesion fixing process of the absorber 13, the said surface side sheet | seat continuous member 110, and the said back surface side sheet | seat continuous member 120 is demonstrated.

  The supply of the absorber 23 is performed in synchronization with the supply of the front surface side sheet continuous member 110 and the back surface side sheet continuous member 120. Between the upper shaft roll 61 and the lower shaft roll 62, the front surface side sheet continuous member 110 and the absorbent layer 2 bonded with the mini sheet piece 14 are passed, and the back surface side sheet continuous member 120 is passed, and the absorber 23 In a state where the roller is sandwiched, pressure is applied from above and below by a pressurizing mechanism provided on the upper shaft roll 61 and the lower shaft roll 62, and the absorbent body 13 is bonded and fixed to form the peripheral portions 15 and 17. As a result, the continuous absorption layer 220 is formed.

  The upper shaft roll 61 has a smooth surface shape, and the lower shaft roll 62 is adjacent to the embossed portion by 0.7 mm 2 per corner, and the embossed portions are arranged in three rows at an interval of 1 mm and an angle of 45 °. An embossed pattern is provided. The upper shaft roll 6 is adjusted to have a heat in the range of 70 ° C. to 120 ° C. and the lower shaft roll 62 has a temperature in the range of 90 ° C. to 140 ° C., and the heat seal is adjusted to have a linear pressure of 300000 to 900000 N / m. Done.

[D process]
Next, the excision (round cut) process of the continuous absorption layer 204 with a mini sheet piece is demonstrated.

  The cutting device 90 into which the continuous absorbent layer 204 with a mini sheet piece is fed is a receiving roll in which the lower shaft roll 92 has a flat shape, and is completed by applying pressure to the upper shaft roll 91 that is a cutter roll provided with a cutter blade. A part unnecessary for the structure of the interlabial pad 1 as a product is round-cut. By passing through the cutting device 90, the continuous absorbent layer 200 is cut into the interlabial pad 1 for each product unit in which a smooth contoured outer contour is formed.

  The individual interlabial pads 20 thus completed are then shipped through processes such as packaging and packing.

[E process]
10A, between the c process and the d process, as indicated by a two-dot chain line, the continuous absorbent layer 204 to which the mini sheet piece 14 is attached is indicated by a vertical axis center line (indicated by a one-dot chain line in FIG. 2). It is also possible to go through step e, which is a step of folding substantially along the symbol A). As shown in FIG. 10 (B), this e step is performed from the left or right side of the continuous absorbent layer 204 with the folded mini-sheet piece provided in the traveling direction (arrow B in FIG. 10 (B)) from the back side sheet. After folding so that the continuous members 120 face each other, or the front side sheet continuous members 110 face each other, it is conveyed toward the step d so that the peripheral portions 15 and 17 are cut. You can also. As described above, by cutting the sheet in half, the continuous absorption layer 204 with a three-dimensional mini sheet piece can be cut accurately regardless of the presence of the absorber 13 contained therein. Become.

[Step f]
Furthermore, in order to further enhance the stability of the e process for folding along the vertical axis center line A, the continuous absorbent layer 200 is folded along the vertical axis center line A along the compression line. It is also preferable to provide a dredging step f. By incorporating such a process, when cutting the folded continuous absorption layer 204 with the mini-sheet piece, a left and right uniform cut shape can be stably secured.

  For example, a pattern roll formed by forming a disk that is linear and continuous with respect to the flow direction of the production line is provided with a convex portion having a width of 0.5 to 3 mm. A roll and a flat roll are heated in a range of normal temperature to 150 ° C., and are adjusted so as to have a linear pressure of 300,000 to 900,000 N / m along the longitudinal axis A of the continuous absorbent layer 2 being conveyed. It can also be embossed by an embossing roll or the like.

  When the interlabial pad 1 manufactured with such a signature is made into an individual package shown in FIGS. 11 to 13 to be described later, it is easy to store such a package when it is stored in the packaging container 40. In addition, there is an advantage that the storage state is not bulky because there is a signature. In particular, as shown in FIG. 12, the folds of the mini sheet piece 14 and the absorbent layer 2 are in opposite directions (the direction in which the fold part of the mini sheet piece 14 and the fold part of the absorbent layer 2 are separated from each other). ), It is easy to take out the interlabial pad 1 from the individual package and insert a finger into the pocket 16 through the finger insertion port.

  And when the fold part (vertical axis centerline A) is provided in the continuous absorption layer 200, this fold part becomes a convex area | region, and the same function as the convex protruding area | region 28 mentioned later There is also an advantage that it is easy to sandwich the absorption layer 2 between the labia. FIG. 14 is a diagram showing a state where the absorbent layer 2 is sandwiched between the labia.

[Step of Second Manufacturing Method]
Next, the 2nd manufacturing method of the interlabial pad 1 replaced with the said 1st manufacturing method which is one embodiment of this invention is demonstrated. FIG. 15 is a process diagram of the second manufacturing method.

This second manufacturing method is
a1) In the mounted state, the absorbent body 13 includes a front-side sheet continuous member 110 in which the front-side sheet 11 located on the body side is continuous, and a back-side sheet continuous member 120 in which the back-side sheet 12 located on the side opposite to the body is continuous. A1 step of forming a continuous absorption layer 200 by superposing so as to include
b1) The b1 step of forming the peripheral edge 15 by joining the front surface side sheet continuous member 110 and the back surface side sheet continuous member 120 around the absorber 13 included in the absorbent layer 2 to each other;
c1) Apply an adhesive to the side facing the non-body side of the back-side sheet continuous member 120 of the mini-sheet piece continuous member 140, cut to a predetermined length on a roll with suction, and form the mini-sheet piece 14; C1 step of transferring from the suction roll to the opposite body side of the back side continuous sheet member 120 and attaching the mini sheet piece 14;
d1) A predetermined width is provided from the absorber 13 to cut the peripheral portions 15 and 17 to form an outer contour of the interlabial pad 1.

  In this manufacturing process, by passing from the said b1 process to c1 process, in the peripheral parts 15 and 17 which form the periphery of the absorber 13, first, the surface side sheet | seat continuous member 110 and the back surface side sheet | seat continuous member 120, Are joined together to form the peripheral edge 15. For this reason, since the mini-sheet piece 14, the front-side sheet continuous member 110, and the back-side sheet continuous member 120 are not integrally heat-sealed, a flexible texture of the peripheral edge portion 15 can be formed.

  That is, the major difference between the manufacturing process of FIG. 10A and the manufacturing process of FIG. 15 is that the c process of FIG. 10A and the b1 process of FIG. It is to be either before or after placing. That is, if the process is to be performed after the mini-sheet piece 14 is disposed, the front-side sheet continuous member 110, the back-side sheet continuous member 120, and the mini-sheet piece 14 are joined at one time. If this process is performed before 14 is disposed, first, the front-side sheet continuous member 110 and the back-side sheet continuous member 120 are joined.

[Storing the interlabial pad of this embodiment]
The interlabial pad 1 with a pocket by the mini sheet piece 14 formed in the short direction of the absorbent layer 2 as described above is an individual package including the interlabial pad to which the mini sheet piece 14 for finger insertion is attached. It is preferable to store as shown in FIGS.

  That is, as shown in FIG. 11, the package of the interlabial pad inclusion of this embodiment has a pocket 16 for finger insertion positioned near the opening 41, and the absorbent layer 2 and the mini folded in two. The interlabial pad 1 is packaged in a different direction from the packaging container 40 so that the pocket 16 as the sheet piece 14 opens naturally. Accordingly, when the packaging container 40 is opened, the finger insertion opening 19a naturally opens due to the plastic deformation of the mini sheet piece 14 and the absorbent layer 2, and the wearer immediately touches the back surface sheet 12 with the belly of the finger in the pocket 16. So that a finger can be inserted.

  In the present invention, the interlabial pad 1 only needs to be positioned in the packaging container 40 so that the pocket 16 is opened in the vicinity of the opening 41, and the mini-sheet piece 14 absorbs as shown in FIG. When it is narrower than the width of the layer 2, it may be bent with the back side sheet 12 inside.

  Moreover, the packaging container 40 should just be a form which can insert a wearer's finger in the pocket 16 which the interlabial pad 1 has immediately after opening, for example, as shown in FIG. It may be.

[Step of Third Manufacturing Method]
Next, the third manufacturing method will be described. This 3rd manufacturing method is a manufacturing method of the interlabial pad 20 which is a modification of Drawing 1-Drawing 9 mentioned above. Before describing the third manufacturing method, the interlabial pad 20 manufactured by the manufacturing method will be described.

<Interlabial pad with raised area>
The interlabial pad 20 has a raised region 28 that protrudes toward the body on the side of the body, FIG. 16 is a perspective view of the interlabial pad 20, and FIG. 17 is a back view of the interlabial pad 20.

  Unlike the interlabial pad 1 shown in FIGS. 1 to 9, the interlabial pad 20 includes a raised region 28 that is convex along the longitudinal direction of the surface side sheet 21. And by making such a protruding region 28 penetrate deeply into the wearer's labia and further improving the wearer's body adhesion, it is possible to further improve the advantage of the interlabial pad that is rich in adhesion Is. For this reason, the interlabial pad 20 does not have both the ease of wearing, the holding ability and the adhesiveness at the same time, and other sanitary products having similar shapes at first glance. For example, it is remarkably different from a sanitary napkin in which a part of a surface in contact with the body is protruded as disclosed in, for example, Japanese Utility Model Laid-Open No. 5-18523.

  According to the present invention, since the finger can be inserted into the pocket 26 for inserting the finger, the position where the raised region 28 is inserted into the labia by using the finger inserted into the pocket 26 with the belly of the finger. Can be accurately grasped. That is, since the inside of the pocket 26 and the inside of the raised area 28 are integrated, the interlabial pad 20 is inserted while the raised area 28 is inserted deep into the labia using a finger inserted into the pocket 26. It is easy to wear.

  In this way, the convex raised region 28 can be partly interposed between the labia and can be more firmly fixed between the labia and can directly absorb menstrual blood from the vaginal opening. In addition, the possibility that a gap is generated between the vulva surface and the liquid-permeable surface-side sheet 21 in the region extending in the lateral direction of the raised region 28 can be reduced. Since the generation of the gap between the labium and the interlabial pad 20 can be suppressed as much as possible, the possibility of blocking the passage of menstrual blood flowing in the longitudinal direction of the absorption layer 22 is improved, and the inner wall of the labium is directed to the anti-body side direction. Since the absorption surface of the absorption layer 22 can be kept almost perpendicular to the direction of excretion of menstrual blood flowing in a large amount at high speed, the risk of transfusion from the short direction of the absorption layer 22 is reduced. be able to.

<Manufacturing method>
The manufacturing method in the third manufacturing process is a manufacturing method of the interlabial pad 20,
a2) A front-side sheet continuous member 110 in which the front-side sheet 21 located on the body side in the mounted state is continuous, and a back-side sheet continuous member 120 in which a material to be the back-side sheet 22 located on the opposite side is continuous. A2 step of overlapping so as to enclose the absorber 23;
b2) The absorber 23 and the front surface side sheet continuous member 110 and the back surface side sheet continuous member 120 or the front surface side sheet continuous member 110 and the back surface side sheet continuous member 120 excluding the absorber 23 are joined together at the periphery of the absorber 23. And b2 step of forming the continuous absorption layer 220,
c2) The continuous absorbent layer 220 is formed along the longitudinal axis A at the substantially central position in the longitudinal direction of the continuous absorbent layer 220 to form a raised region 28 having a convex shape on the surface side sheet continuous member 110 side. C2 step of deforming so that the hem extending in the lateral direction of the 28 is substantially flat,
d2) A mini-sheet piece 24 cut to a predetermined length is attached to both left and right edge portions in the short direction extending from the convex raised region 28 deformed so as to have a substantially flat shape with an adhesive. A d2 step for restricting the bent portion of the continuous absorption layer 220 from spreading,
e2) The continuous absorbent layer 220 with the mini sheet piece 24 is folded in the lateral direction of the left and right around the longitudinal axis A of the convex raised area 28, and the continuous absorbent layer with the mini sheet piece 24 folded into the two. E2 process in which 220 is transported horizontally;
f2) f2 step of round-cutting the peripheral edge 25 in a state where the conveyed continuous absorption layer 220 with the mini sheet piece 24 is folded in two.

  In the manufacturing method, the length of the main processing steps (absorber cut to round cut) is significantly shortened compared to conventional sanitary napkins (specifically, the main processing steps of sanitary napkins are The main processing step of the interlabial pad is about 5 m while it is about 20 m). Such shortening of the manufacturing process is achieved by shortening the raw material transport process. That is, in the conventional sanitary napkin manufacturing process, since the material is manually arranged, the emphasis is placed on improving the operability by placing each material close to the worker. Shortening the delivery distance was not very important. Moreover, the sanitary napkin has many components (about 20 components for the interlabial pad, compared to about 20 components for the sanitary napkin), which makes it difficult to shorten the manufacturing process. It was.

  In addition, since the sanitary napkin is not fitted between the labia when worn, it does not come into contact with the mucous membrane, and even if there is a deviation in the sealing position and cutting position with respect to the absorber position of each constituent material during a long manufacturing process. It has not been particularly problematic to adversely affect the wearing feeling by taking a large allowable range in design.

  However, since the interlabial pad is used by being sandwiched between the labia, if it is manufactured with the deviation of the sealing position and the cutting position of each constituent member with respect to the absorber position, there is a risk of immediately affecting the wearing feeling. There is. For example, if there is a margin in the scissors for holding down the contained absorbent body (peripheral portion that becomes the ear white of the absorbent layer), this portion may cause irritation to the mucous membrane of the wearer during wearing. End up. In other words, with a small interlabial pad, even if the displacement is about the same as that of a sanitary napkin, the degree of effect is considerably larger than that of a sanitary napkin.

  For this reason, in the present invention, the feeling of wearing the finished product is more important than the operability in the manufacturing process, and the main processing steps are shortened. After combining, the processing points are placed close to each other to shorten the transport process, thereby reducing the occurrence of misalignment during the manufacturing process and producing a suitable interlabial pad that feels comfortable to wear. It is possible to do that.

  Hereinafter, the manufacturing process of the third embodiment will be specifically described. FIG. 18 is a diagram showing a series of manufacturing steps of the interlabial pad 20.

[Step a2]
First, the raw material supply process will be described. FIG. 19 is a view showing a cut state of the absorber 23.

<Step a2-1>
The continuous absorbent body 130 is fed out from the raw roll 130 </ b> A and cut into individual absorbent bodies 23 by the cutting device 50. Then it is sent in the direction of the arrow. At the time of this cutting, four cuts are made simultaneously as shown in FIG. Such incisions will be described in accordance with the numbers shown in FIG. 19B. (1) is useful for easily bending the absorber 23 (useful in the c2 step and e2 step described later), and (2) and (3) are miniatures. In order to make it easy to attach the sheet piece (useful in the later-described c2 step), (4) is provided in order to make the wearer's finger and interlabial pad easy to adapt at the time of wearing.

<Step a2-2>
The surface-side sheet continuous member 110 is unwound from the original roll 110 </ b> A, passes through the meandering correction device 111, and then sent to the hot melt adhesive application device 112. After the hot melt adhesive is continuously applied by the application device 112, the surface side sheet continuous member 110 is fed so as to pass over the roll 113.

  On the other hand, the back surface side sheet continuous member 120 is unwound from the original roll 120 </ b> A, passes through the meandering correction device 121, and then sent to the hot melt adhesive application device 122. After the hot melt adhesive is continuously applied by the application device 122, the back surface side sheet continuous member 120 is sent so as to pass under the roll 123.

  The above-described hot melt adhesive is generally used as a so-called hot melt applicator. Specifically, the hot melt melted by heating in a melting tank (not shown) is pumped to the supply hose by various pumps such as a gear pump and a plunger pump, and sent into the manifold. Is applied from a nozzle having a predetermined shape. In this case, the hot melt application pattern may be arbitrarily selected from linear, planar, spiral, Ω, spray, and mesh, and is a pressure sensitive type heated in the range of 120 ° C to 180 ° C. Hot melt is applied in the range of 1 to 10 g / m 2.

[Step b2]
Next, the adhesion fixing process of the absorber 23, the said surface side sheet | seat continuous member 110, and the said back surface side sheet | seat continuous member 120 is demonstrated.

  The supply of the absorber 23 is performed in synchronization with the supply of the front surface side sheet continuous member 110 and the back surface side sheet continuous member 120. The surface side sheet continuous member 110 and the back surface side sheet continuous member 120 are passed between the upper shaft roll 61 and the lower shaft roll 62, and provided on the upper shaft roll 61 and the lower shaft roll 62 with the absorber 23 sandwiched therebetween. The pressurizing mechanism pressurizes from above and below, and the peripheral edge of the absorber 23 is bonded and fixed to form the peripheral edge 25. As a result, the continuous absorption layer 220 is formed.

  The upper shaft roll 61 has a smooth surface shape, and the lower shaft roll 62 is adjacent to the embossed portion by 0.7 mm 2 per corner, and the embossed portions are arranged in three rows at an interval of 1 mm and an angle of 45 °. An embossed pattern is provided. The upper shaft roll 6 is adjusted to have a heat in the range of 70 ° C. to 120 ° C. and the lower shaft roll 62 has a temperature in the range of 90 ° C. to 140 ° C., and the heat seal is adjusted to have a linear pressure of 300000 to 900000 N / m. Done.

[Step c2]
Next, a process for forming the raised region 28 will be described. FIG. 20 (A) is a view showing the state of FIG. C2 as viewed from above, FIG. 20 (B) is a view showing an entering state of the continuous absorption layer 220, and FIG. 20 (C) is an A view of FIG. It is each sectional drawing of -A view, BB view, and CC view.

  In the c2 process, the production line (a2 process → b2 process → c2 process → d2 process → e2 process → f2 process) flows from the right to the left in FIG. 18, but as the continuous absorption layer 220 proceeds in accordance with this traveling direction. The continuous absorption layer 220 is deformed into a V shape. Thereby, in the absorption layer 22 of the interlabial pad 20 which is a finished product, the undulation of the convex raised region 28 having a convex cross section along the vertical axis center line A can be gradually increased. It will be molded.

  As shown in FIG. 20A, the pair of conveying belts 150 and 151 are arranged so as to face each other in the traveling direction E of the production line. The two conveyor belts 150 and 151 are positioned so as to gradually become narrower from the upstream side to the downstream side of the traveling method E (W1> W2).

  As shown in FIG. 20B, a guide 154 having a flat portion 154A and a V-shaped groove portion 154B as shown in FIG. 20C is provided under the conveyor belts 150 and 151 on the production line. Are continuously arranged in the traveling direction E. And flat part 154A rotates so that the said surface side sheet | seat continuous member 110 and the said back surface side sheet | seat continuous member 120 may be sent out to E direction at the same speed.

  The flat portion 154A is provided with a suction hole (not shown). Then, on the conveyor belt 150 and the conveyor belt 151 disposed on the flat portion 154A, a hole 150A and a hole 151A having a hole diameter of 3 to 15 mm are provided so as to correspond to the suction holes of the flat portion 154A. A plurality are provided at intervals of 5 to 30 mm.

  The flat portion 154A is in a state in which the mini-sheet piece 24 and the continuous absorption layer 220 are bonded to each other through the suction belts (not shown) of the guide 154 through the conveying belts 150 and 151 with the holes 150A and 151B by a suction pressure of 1500 to 3000 Pa. The continuous absorption layer 220 is conveyed in the traveling direction E while being held. By doing in this way, it becomes possible to convey the continuous absorption layer 220, preventing that the continuous absorption layer 220 whole is bend | folded by V shape and the space which pastes the mini sheet piece 24 is lost. -ing

  Here, the width of the flat portion 154A is set in a range of 20 to 40 mm because it is necessary to hold the mini sheet piece 24 flat as a bonding base for bonding the mini sheet piece 24 to the continuous absorption layer 220. ing.

  As shown in FIG. 20C, the groove depth of the V-shaped groove 154B (distance from the flat portion 154A to the top of the V-shaped groove 154B) and the width of the groove are not constant. Specifically, the groove depth is in the range of 15 mm to 30 mm, and the width W of the V-shaped groove 154B is in the range of 35 to 50 mm at the entrance position (see AA cross section) in the c2 process line. It is formed in a range of 15 to 25 mm at a position (refer to the CC cross section).

(Sliding guide)
In the present embodiment, due to the above-described configuration, both side portions of the continuous absorbent layer 220 flowing on the conveyor belts 150 and 151 are lifted up under the influence of the suction, and the continuous absorbent layer 220 is not affected by the suction pressure. The continuous absorption layer 220 naturally becomes V-shaped by trying to keep the position of the middle part of the film as it is.

  In addition to this, in the present embodiment, as a sliding guide that presses the continuous absorption layer 220 toward the deep part of the V-shaped groove 154B of the guide 154 so that the continuous absorption layer 220 becomes V-shaped more reliably. A disc-shaped entry guide 153A and exit guide 153B are provided.

  The entrance guide 153A and the exit guide 153B are rotating bodies. The entry guide 153A is a free roll (a roll rotated by the force of the material), whereas the exit guide 153B is a drive roll. As described above, since the width between the conveyor belts 150 and 151 is gradually narrowed as described above, the outlet guide 153B is used to prevent the continuous absorbent body 220 from being clogged at the narrowest outlet. This is because it can be sent out by the driving force of the.

  The entrance guide 153A and the exit guide 153B are processed so that the continuous absorbent body 220 can easily slide on the entrance guide 153A and the exit guide 153B. In this embodiment, since the manufacturing process is short, a roll having a relatively small size is used. Since such a roll is easy to entrain the raw material, in order to prevent such entrainment, the roll surface is used. This is because it is necessary to make the material easy to slide.

  The entry guide 153A regulates the folding direction so as to be convex toward the topsheet. Further, the outlet guide 153B can be given a certain height by being pushed in deeply by the deformation height of the product from the surface of the conveyor belts 150 and 151. By making it pass in this way, the continuous absorption layer 220 can be surely made into a V shape. Moreover, since both guides 153A and 153B are arranged between the conveyor belts 150 and 151, the continuous absorber 220 is fixed on the conveyor belts 150 and 151, and other places (for example, conveyor Compared with the case where the guide is disposed in front of the belt, the guide can be formed in a V-shape in a stable state.

(Eclectic)
In the present embodiment, between the a2 process up to the c2 process and the b2 process, any compromise between a cut line, a broken line, a compression line, etc. is made with respect to the longitudinal center line A of the continuous absorption layer 220. It is possible to keep the base point to be deformed into a V shape on the center line of the product and to keep the folding position constant. By providing such a fold, the continuous absorption layer 220 can be easily deformed along the V-shaped groove 154B, and can be manufactured with reduced generation of distortion.

  For example, the cut line is a rotary cutter formed by forming a blade that is linear and continuous with respect to the flow direction E of the production line, and the compression line has a width of 0.5 to 3 mm. It can also be processed by a so-called rotary cutter or the like adjusted so as to have a linear pressure of 300,000 to 900,000 N / m along the longitudinal axis A of the continuous absorbent layer 22 conveyed by a roll provided with convex portions. .

(Finger insertion restriction)
Furthermore, in the c2 step, in order to prevent the finger inserted into the pocket portion from the finger insertion port 29a from being excessively inserted in the front portion of the interlabial pad 20 (the portion corresponding to the vicinity of the clitoris when worn) The process of forming the finger insertion control part formed by mutually adhering the opposite body side surfaces of the back surface side sheet 22 can also be included.

  Specifically, as shown in FIG. 21, a hot melt adhesive applicator 155 is disposed, and the adhesive is applied to the vertical axis center line A portion of the back surface side sheet continuous member 120. And the back surface side sheet | seat continuous member 120 of the said vertical axis | shaft centerline A part is adhere | attached in the folded state with the adhesive agent apply | coated to the back surface side sheet | seat continuous member 120.

  The hot melt adhesive is generally used as a so-called hot melt applicator, heated in a melting tank (not shown), and hot melted in a molten state is pumped to a supply hose by a gear pump. Then, hot melt fed into the manifold is pressed out and applied from a nozzle having a predetermined shape. The coating pattern can be arbitrarily used, such as linear, planar, spiral, Ω, spray, mesh, etc., and has a basis weight of 5 to 50 g of pressure-sensitive hot melt heated in the range of 140 to 180 ° C. In the range of / m 2, it is intermittently applied at a length of 3 to 10 mm to the end portion of the mini sheet side product on the vertical axis center line A toward the continuous back surface side sheet continuous member 110.

[Step d2]
Next, the attachment process of the mini sheet piece 24 will be described. FIG. 22 is a diagram showing a process of forming a finger insertion restricting portion when a hot melt adhesive is applied to the mini sheet piece continuous member 140.

  In the d2 step, the mini-sheet piece continuous member 140 is unwound from the original roll 140A, passes through the meandering correction device 141, is sent to the hot melt coating device 142, and is applied with the hot melt adhesive. In this case, as shown in FIG. 22A, a hot melt adhesive can be intermittently applied to the product edge side transfer portion of the mini sheet piece in order to form the aforementioned finger insertion restricting portion. Specifically, the hot melt adhesive is applied to the positions 24a, 24b, and 24c between the scheduled cutting positions GG. By doing so, as shown in FIG. 22B, when the mini-sheet piece continuous member 140 is cut into individual mini-sheet pieces 24 in the subsequent process, the portion 24b becomes the finger insertion restricting portion. Become.

  The mini sheet piece continuous member 140 to which the hot melt adhesive is applied is held on the suction roll 143 by applying suction pressure by suction to the roll 143 with suction provided with a plurality of holes. In this state, it is cut into a predetermined length by a cut roll provided with a cutting blade.

  The mini-sheet piece 24 cut to a predetermined length is transferred to the back-side sheet continuous member 120 side and bonded together with the adhesive applied earlier. At this time, in order to prevent the finished product from being wrinkled, the speed at which the continuous absorbent layer 220 is conveyed and the speed at which the cut mini-sheet piece 24 is dropped are the same.

[E2 process (bending process)]
Next, the bending process of the continuous absorption layer 220 to which the mini sheet piece 24 is attached will be described. FIG. 23A is a diagram showing the e2-1 process, FIG. 23B is a diagram showing the e2-2 process, and FIG. 24A shows the manufacturing process when the e2-2 process is excluded. It is the figure seen from the top, The same (B) is the side view.

<Step e2-1>
At the time when it is sent to the e2 process, the continuous absorbent layer 220 is bent into a V shape at the stage of the d2 process, but the mini sheet piece 24 attached to the continuous absorbent layer 220 is folded. Not. Therefore, the continuous absorbent layer 224 with the mini sheet piece flows into the e2 process in a state where only the continuous absorbent layer 220 is bent.

  As shown in FIG. 23A-1, the pair of conveying belts 160 and 161 are arranged so as to face each other in the traveling direction E of the production line. The two conveyor belts 160 and 161 are positioned in a state where they are twisted by 90 ° so as to gradually become vertical from the horizontal toward the downstream from the upstream of the traveling method E. That is, since the conveyor belts 161 and 162 are twisted so as to rise from both sides, the continuous absorption layer 224 with the mini sheet piece conveyed on both belts is folded from both sides.

  More specifically, at the entrance of the e2-1 process, a roll 80A is disposed under the conveyor belt 160, and a roll 80B is disposed under the conveyor belt 161. And at the exit of the e2-1 step, both the conveyor belts are twisted so as to be 90 ° compared to the state at the entrance, so that the roll 81A and the roll 81B are also perpendicular to the roll 80A and the roll 80B. It is arranged to become. For this reason, when the e2-1 process is seen from the side, it becomes as shown in FIG. And the continuous continuous absorption layer 224 with the mini sheet piece which flows on the conveyance belts 160 and 161 is gradually folded into two as shown in FIG.

  Since the e2-1 process is configured as described above, the rolls 80A and 80B, the rolls 81A and 81B, and the twisted conveyor belts 160 and 161, until the process is completed, The continuous continuous absorption layer 224 with a mini sheet piece will be folded together.

<Step e2-2>
Through the e2-2 process as shown in FIG. 23 (B) -1, the folded continuous continuous absorption layer 224 with the mini-sheet pieces gradually becomes horizontal as shown in FIG. 23 (B) -2. You can change the direction. And it is conveyed to the f2 process by a pair of rolls.

  In addition, without providing such an e2-2 process, as shown in FIG. 24, the round cutter apparatus 89 was arrange | positioned to the orthogonal | vertical direction, and the continuous absorption layer 224 with a mini sheet piece was cut in the perpendicular state, and it was cut By transporting the interlabial pad 20, which is an individual product, between the transport belts 163 and 164 twisted at 90 ° C., the interlabial pad 20 can be made horizontal.

[Step f2]
Next, the excision (round cut) process of the continuous absorption layer 224 with a mini sheet piece will be described.

  The cutting device 90 into which the continuous absorbent layer 224 with a mini sheet piece is fed is completed by applying pressure to the upper shaft roll 91 that is a cutter roll provided with a cutter blade, with the lower shaft roll 92 being a flat receiving roll. A part unnecessary for the structure of the interlabial pad 20 as a product is round-cut. By passing through the cutting device 90, the continuous absorbent layer 220 is cut into the interlabial pad 20 for each product unit in which a smooth contoured outer contour is formed.

  Since the continuous absorption layer 224 with the mini-sheet piece is folded in two in the e2-2 process, the round cut is made in this half-folded state. In this regard, when the convex product is cut in a flat state, the central portion is thick because the absorber is bent in a V shape, and each component is crushed. The cut portion cut in such a state does not become smooth but has a saw blade shape, which significantly deteriorates the mounting feeling. Therefore, as in this embodiment, by cutting in half, accurate cutting can be performed regardless of the presence of the absorber to be included.

  The individual interlabial pads 20 thus completed are then shipped through processes such as packaging and packing.

It is sectional drawing of the longitudinal direction which shows the internal structure of the interlabial pad which concerns on this embodiment. It is a top view of FIG. 1 which shows the body side surface of the interlabial pad of this embodiment. It is an external appearance perspective view which shows the anti-body side surface of the interlabial pad which concerns on this embodiment. FIG. 4 is a cross-sectional view taken along the line XX of FIG. 3 for specifically describing “the entire perimeter of the inside of the finger insertion opening”. It is typical sectional drawing which showed the cross section of the transversal pad of the interlabial pad in order to demonstrate the joining state of the mini-sheet piece 4 of the interlabial pad of this embodiment. It is a figure which shows the state which inserted the finger in the pocket for finger insertion provided in the interlabial pad of this embodiment. It is a figure which shows the state which mount | wears the interlabial pad of this embodiment between the labia. It is a figure which shows the state in which the mini sheet piece attached to the interlabial pad of this Embodiment has the length of the range of 10% or more in a longitudinal direction. It is a figure which shows the position of the non-joining part in the back surface side sheet | seat of the mini sheet piece attached to the interlabial pad 1 of this embodiment. It is explanatory drawing for demonstrating the 1st manufacturing process of the interlabial pad of this Embodiment, (A) is a side view (B) of a 1st manufacturing process, The manufacturing process shown with a dashed-two dotted line It is a schematic diagram for demonstrating in more detail. It is a figure which shows the unsealed state of the package which includes the interlabial pad of this embodiment currently folded and encapsulated by the surface side sheet | seat. It is a figure which shows the unseal | opened state of the package which includes the interlabial pad of this Embodiment currently folded and encapsulated in the back surface side sheet | seat. It is a figure which shows the unseal | opened state in case the interlabial pad of this embodiment is included in the packaging container opened in a double-speech form. It is a figure which shows the state of the mini sheet piece after mounting | wearing with the interlabial pad of this Embodiment. It is explanatory drawing for demonstrating the 2nd manufacturing process of the interlabial pad of this Embodiment. It is a perspective view of the interlabial pad which has a protruding area | region. It is a reverse view of the interlabial pad of FIG. It is explanatory drawing for demonstrating the manufacturing process of 3rd Embodiment. It is a figure which shows the notch | incision state of an absorber. It is explanatory drawing explaining the outline | summary of the a2-1 process of FIG. It is a figure which shows a finger insertion control part formation process. It is a figure which shows the process in which a finger insertion control part is also formed when apply | coating a hot-melt-adhesive agent to a mini sheet piece. It is explanatory drawing explaining the outline | summary of the e2 process of FIG. It is explanatory drawing explaining the outline | summary of the manufacturing process at the time of removing e2-2 process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Interlabial pad 11 Front surface sheet 12 Back surface sheet 13 Absorber 14 Mini sheet piece 60 Adhesive fixing device 90 Cutting device 110 Front surface side sheet continuous member 120 Back surface side sheet continuous member 130 Continuous absorber 140 Mini sheet piece continuous member

Claims (1)

The front-side sheet material, the back-side sheet material, the absorber interposed between the front-side sheet material and the back-side sheet material, and the absorber among the front and back surfaces of the back-side sheet material are arranged. the surface is joined Rutotomoni provided to cover the 2 degree thirds of opposite said to face the back surface side sheet material, the outer edge portion except the finger insertion opening to the back side sheet forming a pocket An interlabial pad manufacturing apparatus comprising: a mini-sheet attached
A surface material supply device that supplies the surface side sheet material and the back surface side sheet material so that the absorber is interposed therebetween, and a portion of the surface side sheet material and / or the back surface side sheet material, A surface material coating apparatus that applies an adhesive to at least a part of a portion that comes into contact with each other for joining both sheet materials, and the absorber is interposed between the front surface side sheet material and the back surface side sheet material. An absorbent body supply apparatus for supplying the assembly, an assembly apparatus for assembling the top sheet material, the back sheet material, and the absorber to form a main portion of the interlabial pad ; and the mini sheet on the back surface A mini-sheet attachment device that attaches to the opposite surface of the side sheet material,
The surface material supply device, a surface ZaiHara supplying the surface side sheet member and the back side sheet each fabric roll and back ZaiHara roll is arranged in a vertical direction opposite to the assembly apparatus,
The mini-sheet attachment device, said with a mini-sheet mini sheet raw fabric roll supplies are arranged on the same side as the back ZaiHara roll in a vertical direction with respect to the assembly apparatus, the absorber in the assembled device The interlabial pad manufacturing apparatus is disposed downstream of the step of joining the surface side sheet material and the back surface side sheet material around each other to form a peripheral edge portion .

Images