JP5154133B2 - Absorber and method for producing the absorber - Google Patents

Description

  The present invention relates to an absorber and a method for producing the absorber.

  Conventionally, an absorber used for an absorbent article includes a water-absorbing fiber and is formed in a sheet shape. Here, various ingenuity has been made in order to improve the permeability in excrement such as menstrual blood and to obtain deformability along the shape of the body.

For example, it consists of an absorbent sheet in which a base material sheet is coated with a paint in which an absorbent material and fine fibers are mixed and dispersed. The absorbent sheet has openings formed by a plurality of slits, and the area of the openings is the absorbent sheet. An absorber having a surface area of 10% or more and 90% or less is proposed. A liquid-permeable top sheet is bonded to one surface of the absorber, and a liquid-impermeable back sheet is disposed on the other surface (see, for example, Patent Document 1).
JP-A-11-226054

  Here, the absorbent body of Patent Document 1 forms an opening by forming a plurality of slits in the absorbent sheet and then joining the top sheet or the back sheet with the edges of the absorbent sheet pulled. ing. For this reason, by pulling the end surface, an uneven force is applied to the absorbent sheet, and the absorbent sheet may be broken. Further, when the absorbent sheet is cut with a cutter blade to form an opening, depending on the bulk of the absorbent sheet, the cutting with the cutter blade may be insufficient, and the opening may not be formed well.

  This invention makes it a subject to provide the absorber in which several opening was formed suitably.

  (1) An absorbent body capable of absorbing liquid, which has a plurality of high-rigidity areas and a remaining low-rigidity area, and each of the plurality of high-rigidity areas is for an absorbent article in which an opening is formed. Absorber.

  (2) The absorbent body for absorbent articles according to (1), wherein the opening is larger than a length dimension of the high-rigidity region.

  (3) The said opening is an absorber for absorbent articles as described in (1) smaller than the length dimension of the said highly rigid area | region.

(4) The density of the high rigidity region is 0.12 to 1.0 g / cm ³ , and the density of the low rigidity region is 0.06 to 0.12 g / cm ³ (1) to (3 The absorber for absorbent articles in any one of (1).

  (5) By an embossing step having a plurality of convex portions and a plurality of concave portions, an embossing step for forming a plurality of high-rigidity regions and a remaining low-rigidity region in an absorbent capable of absorbing liquid, and a plurality of cutter blades. Widening to widen the plurality of openings by widening the absorber by an opening forming step for forming openings in each of the plurality of high-rigidity regions, and a biting means having a plurality of convex portions and a plurality of concave portions. The manufacturing method of an absorber including a process.

  (6) In the widening step, the plurality of convex portions in the biting means include a plurality of upper convex portions and a plurality of lower convex portions, and the predetermined upper convex portions in the plurality of upper convex portions and the The method for manufacturing an absorbent body according to (5), wherein at least one of the openings is arranged between an upper convex portion adjacent to a predetermined upper convex portion.

  ADVANTAGE OF THE INVENTION According to this invention, the absorber with which several opening was formed suitably can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view of an absorbent body 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the absorbent body 10. FIG. 3 is an enlarged view of region A in FIG. FIG. 4 is an enlarged view of region B in FIG. FIG. 5A is a diagram illustrating a process for forming the high-rigidity region 11 on the absorbent body 10 ′ with the embossing roll 700. FIG.5 (b) is a top view of absorber 10 'in which the highly rigid area | region 11 was formed. FIG. 5C is an enlarged view of the formed high rigidity region 11. FIG. 6A is a diagram illustrating a process of forming the cut 131 in the high rigidity region 11 of the absorbent body 10 ′ with the cutter roll 800. FIG. 6B is a plan view of the absorbent body 10 ′ in which the cut 131 is formed in the high rigidity region 11. FIG. 6C is an enlarged view of the notch 131 formed in the high rigidity region 11. FIG. 7A is a diagram illustrating a process for widening the cut 131 formed in the absorber 10 ′ by the gear roll 900. FIG. 7B is a plan view of the absorbent body 10 ′ in which the notch 131 is widened. FIG. 7C is an enlarged view of the widened cut 131. FIG. 8 is a diagram illustrating the positions of the gear teeth 911 and 921 in the widening process. FIG. 9 is a diagram for explaining the interval and height of the gear teeth 911. FIG. 10 is an enlarged view of the distal end region of the gear tooth 911. FIG. 11 is a plan view for explaining another embodiment of the absorbent body 10. FIG. 12 is a diagram illustrating another embodiment in the high rigidity region 11. FIG. 13 is a diagram illustrating another embodiment of the cut 131. FIG. 14 is a diagram for explaining the positions of the gear teeth 911 and 921 according to another embodiment in the widening process.

[1] Embodiment An absorbent body 10 according to an embodiment of the present invention will be described with reference to FIGS.

[1.1] Overall Structure As shown in FIGS. 1 to 4, the absorbent body 10 absorbs a liquid and has a liquid retaining property for retaining the absorbed liquid. The absorber 10 is formed in a vertically long shape. The absorber 10 has a plurality of high-rigidity regions 11 and a remaining low-rigidity region 12, and an opening 13 is formed in each of the plurality of high-rigidity regions 11.

The absorbent body 10 is formed by laminating pulp 20 as an absorbent material with a basis weight adjusted in the range of 50 to 600 g / m ^{2 on} the upper surface of the tissue 30 as a covering sheet having a basis weight of 15 g / m ² , The end portion of the tissue 30 is folded back and the pulp 20 is taken up, and the ends of the tissue 30 in the short direction are overlapped with each other and pressed with embossing or the like.

  Examples of the absorbent material include, in addition to the above-mentioned pulp, for example, chemical pulp, rayon, acetate, natural cotton, polymer absorber, fibrous polymer absorber, synthetic fiber, foam, etc., alone or a mixture thereof it can. In particular, it is preferable that it is difficult to lose its shape and has little chemical stimulation. These may have been mixed at the time of spinning to increase molecular orientation, or to have a different cross-sectional shape such as Y-type or C-type. Moreover, in order to improve the slipperiness between fibers, the oil agent may be applied to or contained in the fibers.

  As a covering sheet, in addition to the above-mentioned tissue, for example, cellulose fibers such as pulp, chemical pulp, rayon, acetate, natural cotton, and thermoplastic resins such as polyethylene, polypropylene, polyethylene terephthalate, or a core-sheath type, core Non-woven fabrics formed by hydroentangling, spunbonding, through-air, etc., by combining single and composite sheath-type eccentric and side-by-side type fibers.

[1.2] High Rigidity Region and Low Rigidity Region The high rigidity region 11 is a region formed to have higher rigidity than the surrounding region, and is dispersed at predetermined intervals in the planar direction of the absorbent body 10. A plurality are formed. Here, in the region around the high-rigidity region 11, a low-rigidity region 12 that is a region having lower rigidity than the high-rigidity region 11 is formed. In other words, the absorbent body 10 has a plurality of high rigidity regions 11 and the remaining low rigidity regions 12.

  The high rigidity region 11 is a region where the opening 13 is formed. In other words, it is an area where the cutter blade for forming the slit-shaped cut 131 is pressed. That is, in order to form the notch 131 with the cutter blade, it is preferable that the portion to which the cutter blade is pressed is highly rigid. Therefore, this portion is adjusted to be highly rigid. Here, since it is not preferable that the rigidity of the absorber 10 as a whole becomes too high, the high-rigidity region 11 is formed only in the region near the portion where the cutter blade is pressed.

The high rigidity region 11 in the present embodiment is formed by pressing a predetermined region in the absorbent body 10 from both sides with an embossing roll or the like to be described later. The density of the high-rigidity region 11 formed by pressing a predetermined region of the absorbent body 10 ′ in a state where the density is uniform is 0.12 to 1.0 g / cm ³ , preferably 0.2 to 0.6 g / cm ³ . ³ and the density of the low-rigidity region 12, which is an unpressed region, is 0.06 to 0.12 g / cm ³ , preferably 0.07 to 0.1 g / cm ³ .

  The densities in the high rigidity region 11 and the low rigidity region 12 are obtained as follows. First, predetermined portions in the high-rigidity region 11 and the low-rigidity region 12 are cut, and an enlarged photograph of the cut surface is taken with a digital microscope (VHX-100 manufactured by Keyence). And while calculating | requiring each minimum thickness from an enlarged photograph and cutting out the absorber 10 30 mm x 30 mm and measuring a basic weight, it calculates | requires by calculating the density in each.

  Further, since the high-rigidity region 11 is a region formed by pressing in the thickness direction, the high-rigidity region 11 is formed to be thinner than the low-rigidity region 12. That is, the high rigidity region 11 is a region where both surfaces of the absorber 10 are formed in a concave shape.

[1.3] Opening The opening 13 is mainly formed in the high rigidity region 11. Specifically, as shown in FIG. 1, the opening 13 is formed in an elliptical shape that connects both ends formed in the low-rigidity region 12 on the outer side in the longitudinal direction of the high-rigidity region 11. That is, the opening 13 is mainly formed in the high-rigidity region 11, but both ends in the longitudinal direction and the vicinity thereof are formed in the low-rigidity region 12. The opening 13 is formed to have a longer dimension than the high-rigidity region 11 in the longitudinal direction.

  The dimension in the width direction of the opening 13 is 0.5 to 15 mm, preferably 1 to 5 mm, and the dimension in the longitudinal direction is 0.5 to 15 mm, preferably 5 to 10 mm. When the dimension in the width direction and the longitudinal direction of the opening 13 is smaller than 0.5, a force for contracting the absorbent body 10 in the longitudinal direction or the width direction is applied even if a large number of openings 13 are formed in the absorbent body 10. The flexibility may be inferior due to less shrinkage. Conversely, when the dimension in the width direction and the longitudinal direction of the opening 13 is larger than 15 mm, it becomes difficult to be flexibly deformed in the thickness direction of the absorbent body 10, for example, so that the absorbent article including the absorbent body 10 is along the body. When arranged, it is difficult to adjust to subtle unevenness of the body, and the absorbent body 10 may be twisted, which is not preferable. The opening 13 is preferably 10% or less with respect to the surface area of the absorber 10.

  As shown in FIG. 1, the openings 13 are formed in a staggered pattern in the planar direction. Here, the interval between adjacent openings 13 is preferably 2 mm to 20 mm. When this interval is smaller than 2 mm, the absorbent body 10 may be broken and the absorbent body 10 may be damaged. For example, when an absorbent article including the absorbent body 10 is arranged along the body, It may be difficult to adjust to unevenness. Moreover, when this space | interval is larger than 20 mm, it becomes difficult to deform | transform flexibly in the thickness direction in the absorber 10, and is not preferable.

  Further, as described above, both ends of the opening 13 in the longitudinal direction are formed in the low rigidity region 12. As will be described later, the opening 13 is formed by widening the slit-shaped cut 131 formed in the highly rigid region 11 extending in the longitudinal direction in the width direction. By the widening process, the opening 13 in the longitudinal direction of the cut 131 is formed. By breaking the fiber entanglement around the end, the opening 13 is formed so as to maintain the opening 13 in an open state. The opening 13 is formed so that both ends in the longitudinal direction of the opening 13, in other words, both ends in the longitudinal direction of the notch 131 are located in the low-rigidity region 12. That is, the opening 13 is formed so that both ends in the longitudinal direction of the opening 13 are located in the low-rigidity region 12 where fiber entanglement is likely to occur. Here, both end portions formed in the low-rigidity region 12 in the opening 13 are formed at positions separated from the longitudinal end portion in the high-rigidity region 11 by 0.5 mm to 10 mm.

  The opening 13 is formed by widening a slit-shaped cut 131 in the width direction. In this widening process, a gear roll 900 is used as will be described later. As shown in FIG. 4, the absorber 10 is a portion where the gear teeth 911 and 922 formed on the first gear roll 910 and the second gear roll 920 constituting the gear roll 900 are in contact with each other, and between the notches 131. A linear attached wire 140 is formed therebetween.

[1.4] Rigidity (buckling strength)
Further, the buckling strength as rigidity in the absorbent body 10 is preferably a load of 0.8 N or less at the time of 5 mm compression, and a value obtained by subtracting the load at the time of 5 mm compression from the maximum load is preferably 0.2 N or less. Here, the measuring method of buckling strength is as follows.

(1) The rear end portion of the absorber is cut by 3 mm, and is cut out with a dimension of 50 mm in the longitudinal (MD) direction × 20 mm in the width (CD) direction.
(2) The absorbent body 10 is formed into a columnar shape so that the longitudinal (MD) direction edges are opposed to each other, and the staple (stapler core: No. 10-M: Max Co., Ltd.) is fastened at two locations.
(3) The absorber 10 is compressed by 15 mm under the condition of 25 mm / min by Instron (model number 5564) manufactured by Instron Japan.
(4) Read the numerical value when the compression load is 0.05 N from the position where the compression load is 0.05 N and the maximum compression load. Here, the state where the compression load is 0.05 N is the state where the terminal hits the sample.

[1.5] Manufacturing Method A manufacturing method of the absorbent body 10 will be described with reference to FIGS.
First, the pulp 20 as an absorbent material having a basis weight adjusted in the range of 50 to 600 g / m ² is laminated on the tissue 30 as a covering sheet having a basis weight of 15 g / m ² , and the end of the tissue 30 in the short direction And the pulp 20 is taken up, the ends of the tissue 30 in the short direction are overlapped, and pressed with embossing or the like to form the absorbent body 10 '.

  Next, as shown in FIG. 5 (a), a plurality of high-rigidity regions 11 are formed in the absorbent body 10 'by an embossing roll 700 as embossing means. Specifically, the first embossing roll 710 having protrusions 711 formed on the surface at predetermined intervals and the first embossing roll 710 are arranged so as to face each other with a predetermined gap so that the protrusions 721 correspond to the protrusions 711. A plurality of high-rigidity regions 11 are formed by passing the absorbent body 10 ′ between the second embossing roll 720 and the second embossing roll 720.

  As shown in FIGS. 5B and 5C, high-stiffness regions 11 having high rigidity and high rigidity are formed in a staggered pattern on the surface of the absorbent body 10 ′ in the thickness direction. The The high rigidity region 11 is formed in a rectangular shape that is long in the longitudinal direction of the absorber 10 '. Here, the length in the longitudinal direction of the high-rigidity region 11 is 1 to 20 mm shorter than the length in the longitudinal direction of a slit-shaped cut 131 described later. For example, the length in the longitudinal direction of the high rigidity region 11 is 1 to 25 mm. In this case, the length of the highly rigid region 11 in the width direction is 2 to 15 mm. Further, the interval between the high-rigidity regions 11 is 0.5 to 20 mm.

  Subsequently, as illustrated in FIG. 6A, a slit-like cut 131 is formed in the high-rigidity region 11 formed in the absorbent body 10 ′ by the cutter roll 800. Specifically, a first cutter roll 810 having cutter blades 811 formed on the surface at predetermined intervals, and a second cutter having a flat surface arranged to face the first cutter roll 810 with a predetermined gap therebetween. A slit 131 is formed in each of the plurality of high-rigidity regions 11 by passing the absorbent body 10 ′ between the rolls 820.

  The cutter blade 811 is formed so as to correspond to each of the plurality of high rigidity regions 11 formed by the embossing roll 700. Further, the length of the cutter blade 811 in the MD direction is formed to be longer than the length of the protrusion 711 in the MD direction. That is, as shown in FIGS. 6B and 6C, the length in the longitudinal direction of the slit-shaped cut 131 formed in the highly rigid region 11 is larger than the length in the longitudinal direction of the highly rigid region 11. It is formed to be long. The cuts 131 are formed so that both ends in the longitudinal direction extend from the high rigidity region 11 to the low rigidity region 12.

  The slit-shaped cut 131 is formed with a length of 2 to 30 mm in the longitudinal direction, and extends from both ends of the high-rigidity region 11 to the low-rigidity region 12 by 0.5 to 10 mm. Here, when the length in the longitudinal direction of the notch 131 is smaller than 2 mm, it is not preferable because the notch 131 may not be widened even by processing with a gear roll 900 described later. Moreover, although the length dimension in the longitudinal direction of each notch 131 may differ, in order to make uniform how to apply the force to each notch 131 at the time of widening by the gear roll 900, the length of each other is the same as much as possible. Is preferred. Even when the lengths in the longitudinal direction are different, it is preferable that the difference is within 50% of the length in the longitudinal direction.

  Further, the interval in the width direction between the cuts 131 is 2 to 20 mm, and the interval in the longitudinal direction is 2 to 20 mm. Here, when the interval is narrower than 2 mm, the absorbent body 10 may break when widened by the gear roll 900, which is not preferable.

  Here, the cutter blade 811 cuts a plurality of places in the absorbent body 10 ′ to form the cut 131, but the place where the cutter blade 811 cuts is mainly the high-rigidity area 11, and therefore, compared with the low-rigidity area 12. And can be cut appropriately. That is, in the high-rigidity region 11, the fibers are difficult to move, the fiber density is high, the cutter blades are difficult to move, and the air layer formed between the fibers is small, so the cutter blade 811 Since it becomes difficult to slip, the notch 131 is suitably formed.

  Further, as shown in FIG. 7A and FIG. 8, the absorbent body 10 ′ in which the slit-like cut 131 is formed in the high rigidity region 11 is widened in the width direction by the gear roll 900 as the biting means. The notch 131 is widened to form the opening 13. Specifically, a first gear roll 910 in which gear teeth 911 formed on the surface so as to extend in the circumferential direction are formed at predetermined intervals in a width direction orthogonal to the circumferential direction, and a predetermined gap from the first gear roll 910. The absorbent body 10 'is passed between the second gear roll 920 having gear teeth 921 which are arranged so as to face each other and are alternately meshed with the gear teeth 911 so as to extend in the circumferential direction. Thus, the absorbent body 10 'is widened in the width direction and the cut 131 is widened in the width direction.

  Specifically, as shown in FIG. 8, two gear teeth 911 abut from the upper surface between a predetermined notch 131 and a notch 131 adjacent to the predetermined notch 131, and two gear teeth from the lower surface. 911 is widened by passing the gear roll so that the gear teeth 921 come into contact with the intermediate position of the corresponding position.

  Here, by performing the widening process with the above-described gear roll 900, as shown in FIGS. 4 and 7B, between the predetermined opening 13 and the opening 13 adjacent to the predetermined opening 13 in the width direction. The attached wire 140 is formed. The form of the attached wire 140 differs depending on the position and angle at which the gear teeth 911 and 921 of the absorbent body 10 ′ contact. For example, when the gear teeth 911 are widened by the above-described gear roll 900 such that the gear teeth 911 are in contact with the notches 131, the attached wire 140 is formed so as to connect the plurality of openings 13 to each other. In addition, even when the width is increased by the above-described gear roll 900, depending on the height of the gear teeth 911 and 921 and the interval between the rolls, the gear teeth 921 can be used in addition to the auxiliary wire 140 formed by the above-described gear teeth 911. In some cases, an attached wire that connects the plurality of openings 13 to be formed may also be formed.

  The distance a between the apexes of the gear teeth 911 shown in FIG. 9 is determined by the distance in the width direction of the cut 131, and is 4 to 20 mm in this embodiment. The gear tooth height b is 2 to 20 mm. Further, the tip width c of the gear teeth 911 shown in FIG. 10 is 0.2 to 3 mm, and the tip angle α of the gear teeth 911 is 90 to 135 degrees. Here, the tip angle α of the gear teeth 911 is preferably an obtuse angle because the absorber 10 ′ is not broken at the time of contact. Further, the gear teeth 911 may be continuous streaks (a shape extending in the CD direction) or intermittent (a shape extending intermittently in the CD direction). For example, the gear teeth 131 may be intermittently formed according to the length in the longitudinal direction of the absorbent body 10 ′.

  Here, the widened opening state is maintained by breaking the entangled state of the fibers arranged at both ends of the notch 131 (both ends of the opening 13) and making the fibers loose by the above-described widening process. I try to do it. In the present embodiment, since both ends of the cut 131 (both ends of the opening 13) are located in the low-rigidity region 12, the entangled state can be suitably broken and the fibers can be loosened during the widening process. Thereby, the absorber 10 which has the opening 13 which can maintain an opening state suitably can be formed.

[2] Other Embodiments Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented in various other forms.

[2.1] Opening In the present embodiment, the opening 13 has been described with respect to the aspect in which both end portions in the longitudinal direction extend to the low-rigidity region 12, but the present invention is not limited to this. You may form so that it may be located in. That is, as shown in FIG. 11, the length in the longitudinal direction of the opening 13 may be shorter than the length in the longitudinal direction of the high rigidity region 11. By forming the opening 13 in this way, the opening 13 can be made difficult to be crushed even when the absorber 10 is deformed. Therefore, the absorber 10 which can maintain an open state even after deform | transforming continuously can be provided. The absorbent body shown in FIG. 11 is the same as the above-described absorbent body 10 except that the size (length in the longitudinal direction) of the opening 13 (cut 131) is different, and the method for manufacturing the absorbent body 10 described above. It can be manufactured by the same method.

  Further, in the present embodiment, the opening 13 has an elliptical shape that is long in the longitudinal direction. However, the present invention is not limited to this, and it may be an elliptical shape that is long in the widthwise direction, But it may be rectangular. Here, when the absorbent body 10 is used in a state where it is disposed in a predetermined absorbent article, the portion is formed according to the position to be formed so as to be easily deformed according to body grooves or body movements. Alternatively, the shape of the opening 13 may be adjusted. For example, by forming the opening 13 formed in the central portion in the width direction so that the opening area is larger than the opening 13 formed on the side edge in the width direction, the central region in the width direction of the absorber 10 is a peripheral region. It is preferable because it deforms more flexibly and deforms along the central region of the body with large irregularities.

  Further, for example, by increasing the area of the opening 13 formed behind the labia rather than the opening 13 formed in front of the labia in the body, it corresponds to a portion where the skin surface moves greatly during walking or the like. The area to be made can be flexibly deformed. Here, enlarging the opening area in the predetermined region includes not only increasing the area of the opening 13 itself, but also including arranging the openings 13 so as to be dense with each other.

  Moreover, in this embodiment, although the opening 13 is formed so that it may disperse | distribute uniformly over the whole surface of the absorber 10, it is not limited to this, You may provide the predetermined area | region in which the opening 13 is not formed. The predetermined region where the opening 13 is not formed is preferably such that the outer edge in the longitudinal direction in the predetermined region is located at least 30 mm from the outer edge in the longitudinal direction of the absorbent body 10. That is, it is preferable that the opening 13 is formed in the rear region of the labia, which is a portion where the skin surface moves greatly during an operation such as walking. The dimension in the longitudinal direction of the predetermined region is preferably 40 mm or more, particularly 60 to 120 mm. Further, the dimension in the width direction is preferably 10 mm or more, particularly preferably 25 to 50 mm. Further, the shape of the predetermined region is not particularly limited, and for example, it can be formed in a bowl shape, a rectangle, a circle, a quadrangle, a triangle, or the like.

  Moreover, in this embodiment, although the opening 13 is formed in the staggered pattern in the plane direction in the absorber 10, it is not limited to this, You may form in a grid | lattice form or at random.

  In the present embodiment, the openings 13 are formed so as not to overlap each other in the longitudinal direction and the width direction. However, the present invention is not limited to this, and as illustrated in FIG. 13, the openings 13 overlap in the longitudinal direction or the width direction. It can be formed alternately. For example, the opening 13 can be formed so as to overlap 0.5 to 5 mm in the longitudinal direction or the width direction. Here, overlapping in the longitudinal direction or the width direction means that the openings 13 do not overlap but overlap when the opening 13 is projected in the longitudinal direction or the width direction. By forming the opening 13 so as to overlap in the longitudinal direction or the width direction in this way, the stretchability and stretchability of the absorbent body 10 are enhanced, and it is possible to flexibly deform following the movement of the wearer. .

"2.2" High rigidity region 11
In the present embodiment, the high-rigidity region 11 is formed corresponding to the position where the notch 131 is formed, but is not limited to this, and is formed so as to be continuous in a predetermined direction in consideration of the deviation generated in the cutter roll 800. May be. For example, as shown in FIG. 12, the high-rigidity region 11 can be formed in a rectangular shape that is continuous in the width direction. In this case, the cuts 131 are formed at predetermined intervals in the width direction, and even if some deviation occurs in the cutter roll 800, it is possible to suppress the cuts 131 from protruding from the high rigidity region 11 and only in the low rigidity region 12. .

“2.3” Opening Manufacturing Method In the present embodiment, as the embossing means, a first embossing roll 710 having protrusions 711 formed on the surface at predetermined intervals, and the first embossing roll 710 face each other with a predetermined gap. Although the embossing roll 700 which has the 2nd embossing roll 720 arrange | positioned so that the processus | protrusion 721 may be corresponded with the processus | protrusion 711 is used, it is not limited to this. For example, you may use the embossing roll comprised by the 1st embossing roll 710 in which the processus | protrusion 711 is formed in the surface at predetermined intervals, and the flat roll in which the processus | protrusion is not formed in the surface. Here, the positional relationship in the vertical direction between the first embossing roll and the flat roll is not particularly limited.

  In this embodiment, the widening process in the case where the cuts 131 are formed in a staggered manner has been described. For example, the widening process in the case where the cuts 131 are formed in a lattice shape is performed as follows. be able to. That is, as shown in FIG. 14, the gear roll 900 is configured such that the gear teeth 911 are positioned between the predetermined notch 131 and the notch 131 adjacent to the predetermined notch 131, and the gear teeth 921 are positioned at the notch 131. Widening processing can be performed by passing through.

  In this embodiment, as shown in FIGS. 7A and 7B, the absorbent body 10 is widened in a state where the longitudinal direction of the absorbent body 10 is arranged along the machine flow direction. However, the present invention is not limited to this, and the widening process may be performed by rotating the absorbent body 10 by 90 degrees from the state shown in FIG.

It is a top view of absorber 10 in an embodiment of the present invention. 3 is a cross-sectional view of the absorber 10. FIG. FIG. 3 is an enlarged view of a region A in FIG. 2. It is an enlarged view of the area | region B in FIG. It is a figure explaining the process which forms the highly rigid area | region 11 in absorber 10 'with the embossing roll 700. FIG. It is a figure explaining the process which forms the cut 131 in the highly rigid area | region 11 in absorber 10 'with the cutter roll 800. FIG. It is a figure explaining the process which widens the notch 131 formed in absorber 10 'by the gear roll 900. FIG. It is a figure explaining the position of the gear teeth 911 and 921 in the widening process. It is a figure explaining the space | interval and height of a gear tooth | gear 911. FIG. 6 is an enlarged view of a tip region of a gear tooth 911. It is a top view explaining other embodiment in absorber 10. FIG. It is a figure explaining other embodiment in the highly rigid area | region 11. FIG. It is a figure explaining other embodiment in the notch | incision. It is a figure explaining the position in the gear teeth 911 and 921 of other embodiment in a widening process.

Explanation of symbols

10 Absorber 11 High rigidity region 12 Low rigidity region 13 Opening

Claims (6)

An absorber capable of absorbing liquid,
Having a plurality of high-rigidity areas and a remaining low-rigidity area;
In each of the plurality of high-rigidity areas, an opening larger than the length dimension of the high-rigidity area is formed ,
Both ends in the longitudinal direction of the opening and the vicinity thereof are formed in the low rigidity region,
Each of the both ends formed in the low-rigidity area in the opening is an absorbent article for absorbent articles , which is formed at a position spaced from 0.5 mm to 10 mm from the longitudinal end in the high-rigidity area . The absorbent body for absorbent articles according to claim 1, wherein the openings are formed in a staggered pattern in the planar direction. The absorbent body for an absorbent article according to claim 2, wherein an interval between the adjacent openings is 2 mm to 20 mm. The density of the high rigidity region is 0.12 to 1.0 g / cm ³ ,
The absorbent body for absorbent articles according to any one of claims 1 to 3, wherein the density of the low rigidity region is 0.06 to 0.12 g / cm ³ . It is a manufacturing method of the absorber according to any one of claims 1 to 3,
The embossing means having a plurality of projections and a plurality of recesses, the embossing step of forming said low-rigidity region of said plurality of high rigidity region and the remainder to the resorbable said absorbent liquid,
A plurality of cutter blade, an opening forming step of forming the opening on each of the plurality of high rigidity region,
The manufacturing method of an absorber including the widening process of expanding the said opening by widening the said absorber by the biting means which has a some convex part and a some recessed part. An embossing step of forming a plurality of high-rigidity regions and a remaining low-rigidity region in an absorbent body capable of absorbing liquid by an embossing means having a plurality of convex portions and a plurality of concave portions;
An opening forming step of forming openings in each of the plurality of high-rigidity regions by a plurality of cutter blades;
A widening step of widening the plurality of openings by widening the absorbent body by biting means having a plurality of convex portions and a plurality of concave portions, and a manufacturing method of the absorbent body,
In the widening step, the plurality of convex portions in the biting means have a plurality of upper convex portions and a plurality of lower convex portions,
Wherein between the upper convex portion adjacent to said predetermined upper convex portion and the predetermined upper convex portion of the plurality of upper protrusions, at least one method for producing the suction absorbent body having an opening Ru is located.

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