JP5202282B2 - Sheet manufacturing method - Google Patents

Description

  The present invention relates to a sheet manufacturing method that can be applied to pant products such as disposable pants-type diapers, disposable pants, and disposable pants-type diaper covers, and open-type diaper related products such as disposable open-type diapers and disposable open-type diaper covers. is there.

Conventionally, a method of providing an elastic region and an inelastic region in the vicinity of the edge of the leg opening of the diaper is known. For example, Patent Document 1 discloses a method for manufacturing an elastic sheet that is a part of an absorbent article that receives excrement from a wearer; an elastic member on a first sheet member that is conveyed in a predetermined conveyance direction. At least a portion thereof is disposed in an extended state as an inclined portion that is inclined with respect to both the transport direction and a direction perpendicular to the transport direction, and the elastic member is interposed between the first sheet member and the first sheet member. A step of laminating two sheet members and joining the first sheet member and the second sheet member; a plurality of cuts along a plurality of lines intersecting the inclined portion at an angle of 45 ° to 135 ° The manufacturing method of the expansion-contraction sheet | seat provided with the process of cut | disconnecting the said inclination part with at least one of the said 1st sheet member and the said 2nd sheet member with a blade is disclosed.
JP 2008-148941 A

  However, the manufacturing method disclosed in Patent Document 1 includes a step of cutting the elastic member with a plurality of cutting blades for the purpose of cutting the elastic member to form an inelastic region. I can not say.

  This invention is made | formed in view of the said situation, The objective is to provide the manufacturing method of the sheet | seat which can manufacture efficiently the sheet | seat which has an elastic area | region and an inelastic area | region along an edge.

  The sheet manufacturing method of the present invention that has solved the above problems includes a step of feeding the first sheet in the conveying direction (first sheet feeding step); the first elastic member and the second elastic member being the first sheet. The first sheet is arranged in a continuous meandering line at a predetermined cycle so as not to intersect the first imaginary line extending in the conveyance direction and to be substantially line symmetric with respect to the first imaginary line, A step of obtaining an elastic sheet (an elastic member disposing step); a part of the first elastic member and / or the second elastic member so that an annular hole or a pair of arc-shaped cutouts is formed at the predetermined period in the conveying direction The elastic sheet is cut along a cutting line that extends along the cutting line and intersects the first elastic member and / or the second elastic member in the other part of the first elastic member and / or the second elastic member (hole / Notch forming step); the elastic sheet in the width direction Cross, and has a feature where the and a step (cutting step) to obtain a plurality of sheets. According to the sheet manufacturing method of the present invention, by cutting the elastic sheet, forming an annular hole or a pair of arc-shaped notches and forming an inelastic region along the edge of the annular hole or arc-shaped notch, It can be done at once. In addition, both the elastic region and the inelastic region can be formed along the edge of the annular hole or the circular arc cutout. Therefore, the elastic region and the non-elastic region are simply formed along the edge of the annular hole or the arc-shaped notch, and a sheet having the non-elastic region can be manufactured efficiently.

  The sheet manufacturing method of the present invention may further include a step of applying an adhesive to the first sheet. With the above configuration, it is easy to dispose and fix the first elastic member and the second elastic member on the first sheet. Moreover, the manufacturing method of the sheet | seat of this invention may have the process of laminating | stacking a 2nd sheet on a 1st sheet on both sides of a 1st elastic member and a 2nd elastic member. With the above configuration, a laminated sheet in which the first elastic member and the second elastic member are sandwiched between the first sheet and the second sheet is obtained.

  The first elastic member and the second elastic member are preferably disposed on the first sheet in a sine half wave shape, a trapezoidal wave shape, or a combination thereof. With the above configuration, it is easy to form an inelastic region along the edge of the annular hole or arcuate notch, and the sheet obtained by the manufacturing method of the present invention has an elastic member along the annular hole or arcuate notch. It becomes easy to arrange.

  In the case of forming the annular hole in the hole / notch formation step, the sheet manufacturing method of the present invention is configured such that the annular hole is formed at the predetermined period in the conveying direction. The elastic sheet is cut along an annular cutting line that extends along a part of the member and intersects the first elastic member and / or the second elastic member in the other part of the first elastic member and / or the second elastic member. Cutting the elastic sheet in the width direction across the annular hole to obtain a plurality of sheets; and further folding the elastic sheet in half by a folding line extending in the conveying direction; And joining the elastic sheets folded back to each other. In this case, the sheet obtained by the production method of the present invention is formed into a pants shape and can be suitably used for pant products such as disposable pants-type diapers, disposable pants, and disposable pants-type diaper covers.

  When the annular hole is formed, the annular cutting line is formed on the second imaginary line where the length in the width direction between the first elastic member and the second elastic member is maximized, and the first elastic member and the second elastic member. It is more narrow in the width direction, and the annular cutting line preferably intersects the first elastic member and the second elastic member four times each. According to the said structure, the pants product which formed the sheet | seat obtained in pants shape has two inelastic area | regions each in the edge vicinity of a right-and-left leg opening part. When the annular hole is formed, the annular cutting line is formed on the second imaginary line in which the length in the width direction between the first elastic member and the second elastic member is a maximum, and the first elastic member and the second elastic line. It is also preferable that the annular cutting line intersects the first elastic member and the second elastic member twice each wider than the elastic member in the width direction. According to the said structure, the pant product which formed the sheet | seat obtained in pants shape has one inelastic area | region each near the upper edge of the right-and-left leg opening part. In any case, the effect of preventing excrement leakage from the crotch and the effect of improving the feeling of wearing around the legs can be obtained in a well-balanced manner.

  When the arc-shaped notch is formed in the hole / notch forming step, the sheet manufacturing method according to the present invention provides the first elastic member so that the pair of arc-shaped notches are formed at the predetermined period in the conveying direction. The elastic sheet is cut at a first cutting line that extends along a part of the first elastic member and intersects the first elastic member at the other part of the first elastic member, and extends along a part of the second elastic member. Cutting the elastic sheet at a second cutting line intersecting the second elastic member at the other part of the second elastic member; cutting the elastic sheet in the width direction except for the portion provided with the arc-shaped notch, It is preferable to obtain a plurality of sheets. In this case, the sheet obtained by the production method of the present invention can be suitably used for open diaper-related products such as disposable open diapers and disposable open diaper covers.

  When forming an arc-shaped notch, the first cutting line may intersect the first elastic member twice or four times, and the second cutting line may intersect the second elastic member twice or four times. preferable. According to the above configuration, when the obtained sheet is applied to an open diaper-related product, one or two inelastic regions are formed in the vicinity of the edges of the left and right leg openings of the product, respectively. The effect of preventing leakage of excrement from the crotch and the effect of improving the feeling of wearing around the legs can be obtained in a balanced manner.

  The sheet manufacturing method of the present invention can efficiently manufacture a sheet having an elastic region and an inelastic region along the edge.

  The sheet manufacturing method of the present invention includes a step of feeding the first sheet in the conveying direction (first sheet feeding step); a first virtual member that extends the first elastic member and the second elastic member in the conveying direction of the first sheet. A process of obtaining an elastic sheet by arranging the first sheet in a continuous meandering line with a predetermined period so as not to intersect the line and to be substantially line-symmetric with each other with respect to the first imaginary line (elastic member arrangement) Step); extending along a part of the first elastic member and / or the second elastic member so as to form an annular hole or a pair of arc-shaped cutouts in the conveying direction at the predetermined period, and the first elasticity A step of cutting the elastic sheet at a cutting line intersecting the first elastic member and / or the second elastic member in the other part of the member and / or the second elastic member (hole / notch forming step); A process of obtaining a plurality of sheets by cutting in the width direction ( Having a cross-sectional step) and. Hereinafter, the manufacturing method of the sheet | seat of this invention is demonstrated with reference to FIGS. In addition, this invention is not limited to the following embodiment.

  In the first sheet feeding process 1, the first sheet 11 is fed in the transport direction v. The first sheet 11 has a transport direction v and a width direction w perpendicular to the transport direction v on the first sheet plane. The first sheet 11 preferably has a rectangular outer shape, and is fed out in the conveyance direction v parallel to the long side of the rectangle.

  The first sheet 11 virtually has a first imaginary line 12 extending in the conveyance direction v of the first sheet. Moreover, the 1st sheet | seat 11 may have the 2nd virtual line 27 or the 3rd virtual line 28 which extends further in the width direction w of a 1st sheet | seat virtually so that it may mention later. Each imaginary line need not be real, for example visually or tactilely recognizable. Each imaginary line extends in a straight line. It is preferable that the first imaginary line 12 extends in a straight line shape in the transport direction v substantially at the center position in the width direction w of the first sheet 11.

  The first sheet 11 is preferably liquid-impermeable or water-repellent, and as the material of the first sheet 11, for example, a nonwoven fabric or a plastic film is used.

  In the elastic member disposing step 3, the first elastic member 14 and the second elastic member 15 are disposed on the first sheet 11 to obtain the elastic sheet 16. The first elastic member 14 is continuously introduced into a region between the first imaginary line 12 of the first sheet 11 and the one end 17 in the width direction, and the second elastic member 15 is the first imaginary of the first sheet 11. It is continuously introduced into the region between the line 12 and the other end 18 in the width direction. Therefore, neither the first elastic member 14 nor the second elastic member 15 intersects the first virtual line 12. When the first sheet 11 has a rectangular shape, the one end 17 in the width direction is preferably one of the long sides of the rectangle, and the other end 18 in the width direction is the other of the long sides of the rectangle. preferable. Since the first elastic member 14 and the second elastic member 15 are introduced into different regions across the first imaginary line 12, they do not intersect each other.

  The first elastic member 14 and the second elastic member 15 are arranged on the first sheet 11 in a continuous meandering line shape with a predetermined period so as to be substantially line-symmetric with respect to the first virtual line 12. The meandering line is not particularly limited as long as it has a predetermined amplitude in the width direction w of the first sheet 11 and extends in the conveyance direction v as a whole. The amplitude means the maximum amplitude, and the meandering line may have a portion having an amplitude smaller than the maximum amplitude. The meander line has the same shape repeated at a predetermined period.

  Examples of meander lines include a sine wave (including a composite wave of a plurality of sine waves), a triangular wave, a rectangular wave, a trapezoidal wave, a combined wave of a sine wave and other waveforms (triangular wave, rectangular wave, or trapezoidal wave), And their half waves etc. are shown. Note that the half wave means a waveform cut by a straight line within a predetermined amplitude range. For example, a waveform extending in the x direction on the xy plane (for example, a waveform represented by y = sin (x)). ) In which y ≧ n (n is a real number) is left and the end points of adjacent curved line segments formed by the remaining portions are connected by a line segment of y = n. In the illustrated waveform, when a non-differentiable point (that is, a non-smooth portion) exists, it is preferable that a portion near the point is smooth. The meandering line is preferably a sine half wave, a trapezoidal wave, or a combination thereof (including those in which the corners of the waveform are smoothed). If the meandering line has the shape described above, it is easy to form an inelastic region along the edge of the annular hole or arcuate notch, and the sheet obtained by the production method of the present invention has an annular hole or arcuate notch. It becomes easy to arrange an elastic member along. For example, the first elastic member 14 and the second elastic member 15 are disposed on the first sheet 11 in a sine half wave shape in FIGS. 1 and 5, and in FIGS. 2 and 3, the first sheet has a trapezoidal wave shape with smooth corners. In FIG. 4, the first sheet 11 is arranged in a meandering line shape in which a trapezoidal wave having a smooth corner and a sine half wave are combined.

  The first elastic member 14 and the second elastic member 15 are disposed on the first sheet 11 so as to be substantially line-symmetric with respect to the first virtual line 12. However, the first elastic member 14 and the second elastic member 15 may not be arranged so as to be strictly line symmetrical with respect to the first virtual line 12. For example, the amplitude of the first elastic member 14 may be larger or smaller than the amplitude of the second elastic member 15. The first elastic member 14 and the second elastic member 15 are at least a width direction line (a line extending in the width direction w) at which the length between the first virtual line 12 and the first elastic member 14 is minimized. The width direction line between which the length between the first virtual line 12 and the second elastic member 15 is minimized coincides, and the length between the first virtual line 12 and the first elastic member 14 is maximum. And the width direction line where the length between the first imaginary line 12 and the second elastic member 15 becomes a maximum may coincide with each other. When the width direction line that becomes the maximum or minimum exists as a continuous area (when the part that becomes the maximum or minimum exists continuously), the width in the conveyance direction bisector of the continuous area becomes the maximum or minimum width Considered a direction line.

  Each of the first elastic member 14 and the second elastic member 15 may be composed of one elastic member or a plurality of elastic members.

  The first elastic member 14 and the second elastic member 15 can be made of an elastic stretch material such as polyurethane yarn, polyurethane film, natural rubber or the like. Each elastic member is preferably disposed on the first sheet in a stretched state by a bonding means such as a hot melt adhesive, thermal bonding, or ultrasonic bonding. For example, a polyurethane yarn having a fineness of 100 to 2,500 dtex is disposed by being stretched at a magnification of 1.1 to 5.0 times and fixed. As the joining means, it is preferable to use a rubber-based hot melt adhesive.

  In the elastic member disposing step 3, in addition to the first elastic member 14 and the second elastic member 15, other elastic members may be disposed. When the sheet obtained by the production method of the present invention is applied to a pants product or an open-type diaper-related product, as other elastic members, a waistline elastic member for improving fitability around the waist, or a waist opening edge An elastic member for a waist provided along therewith.

  The sheet manufacturing method of the present invention may have a step of applying the adhesive 13 to the first sheet 11 (adhesive applying step 2) prior to the elastic member disposing step 3. The adhesive application process 2 makes it easy to dispose and fix the first elastic member 14 and the second elastic member 15 to the first sheet 11. The adhesive 13 is preferably applied to at least a portion where the first elastic member 14 and the second elastic member 15 are disposed. As the adhesive, a hot-melt adhesive such as polyolefin, rubber, or vinyl acetate can be used. The adhesive 13 is applied to the first sheet 11 using, for example, a contact coater (coating machine) or a non-contact curtain spray.

  In the sheet manufacturing method of the present invention, after the elastic member disposing step 3, the second sheet 19 is laminated on the first sheet 11 with the first elastic member 14 and the second elastic member 15 interposed therebetween (first step). You may have 2 sheet | seat lamination process 4). The second sheet 19 preferably has a rectangular outer shape, and more preferably has the same length as the first sheet 11 in the width direction w. By the second sheet laminating step 4, a laminated sheet in which the first elastic member 14 and the second elastic member 15 are sandwiched between the first sheet 11 and the second sheet 19 is obtained.

  The second sheet 19 is preferably liquid-permeable, hydrophilic, or water-repellent. As the material of the second sheet 19, for example, a nonwoven fabric or a plastic film is used.

  In the hole / notch forming step 5, the annular hole 20 or the pair of arc-shaped notches 21 is formed in the conveying direction v at a predetermined cycle. Specifically, in the hole / notch forming step 5, the elastic sheet 16 is cut along cutting lines 22, 23, and 24 that form the annular hole 20 or the pair of arc-shaped notches 21 at a predetermined period in the conveying direction v. The period in which the annular hole 20 or the pair of arcuate notches 21 is formed coincides with the period in which the first elastic member 14 and the second elastic member 15 are disposed. In addition, even when the period in which the annular hole 20 or the pair of arc-shaped cutouts 21 is formed is an integral multiple of the period in which the first elastic member 14 and the second elastic member 15 are disposed, both periods coincide with each other. Consider it a thing.

  The cutting lines 22, 23, and 24 that form the annular hole 20 or the pair of arcuate notches 21 extend along a part of the first elastic member 14 and / or the second elastic member 15, and have a first elasticity. The other part of the member 14 and / or the second elastic member 15 intersects the first elastic member 14 and / or the second elastic member 15.

  In the portion 25 where the cutting line extends along a part of the first elastic member 14 and / or the second elastic member 15, the cutting lines 22, 23, 24 are the first elastic member 14 or the second elastic member 15. It is preferable to extend within a range of 5 mm to 30 mm from the distance. In the portion 25, it is preferable that the cutting lines 22, 23, and 24 extend substantially parallel to the first elastic member 14 or the second elastic member 15 as a whole in the portion 25. In the portion 25 where the cutting line extends along a part of the first elastic member 14 and / or the second elastic member 15, the cutting lines 22, 23, 24 are, for example, linear, curved, or a combination thereof Extend in different shapes. By cutting the elastic sheet 16 with a cutting line extending along a part of the first elastic member 14 and / or the second elastic member 15, the sheet obtained by the manufacturing method of the present invention has an annular hole or an arc shape. An elastic member will be arrange | positioned along a notch.

  A cutting line that forms the annular hole 20 or the pair of arc-shaped cutouts 21 is connected to the first elastic member 14 and / or the second elastic member 15 in the other part of the first elastic member 14 and / or the second elastic member 15. Intersect. By cutting the elastic sheet 16 at a cutting line that intersects the first elastic member 14 and / or the second elastic member 15, an inelastic region 26 is formed along the edge of the annular hole 20 or the arcuate notch 21. .

  In the hole / notch formation step 5, the elastic sheet is cut to form the annular hole 20 or the pair of arcuate notches 21 and the inelastic region 26 along the edge of the annular hole 20 or the arcuate notch 21. And is done at once. Therefore, a sheet having an elastic region and an inelastic region along the edge of the annular hole or the arc-shaped notch is efficiently manufactured.

  A case where an annular hole is formed in the hole / notch forming step 5 will be described with reference to FIGS.

  In the case of forming the annular hole, in the hole / notch formation step 5, the first elastic member 14 and / or the second elastic member 15 extends along a part 25 of the first elastic member 14 and / or the first elastic member 14 and / or the second elastic member 14. It is preferable to cut the elastic sheet 16 at an annular cutting line 22 that intersects the first elastic member 14 and / or the second elastic member 15 at the other part of the elastic member 15. In this case, the sheet | seat obtained by the manufacturing method of this invention can be formed in pants shape, and can be used conveniently for pants products, such as a disposable pants type diaper, a disposable pants type, and a disposable pants type diaper cover. The pant product includes a front abdomen, a back part, and a crotch part positioned between them, and a waist opening and a pair of leg openings are formed by joining the front part and the back part. Are preferred.

  The shape of the annular cutting line 22 only needs to form a geometrically closed region. Examples of the shape of the annular cutting line 22 include a circle, an ellipse, a fan, a polygon, an isosceles trapezoid, and a figure in which the vertex of the figure excluding the circle and the ellipse is smooth.

  The annular cutting line 22 is preferably symmetrical with respect to the second virtual line 27 extending in the width direction w. The second virtual line 27 is a width direction line (a line extending in the width direction w) in which the length in the width direction w between the first elastic member 14 and the second elastic member 15 is maximized. . As shown in FIG. 2, when the maximum width direction line exists as a continuous region (when the maximum portion continuously exists), the conveyance direction bisector of the continuous region is defined as the second imaginary line. It is considered. Further, when the annular cutting line 22 is axisymmetric with respect to the second imaginary line 27, the first elastic member 14 and the second elastic member 15 are symmetric with respect to the second imaginary line 27 in the elastic member disposing step 3. It is preferable to arrange | position in. In this case, the first elastic member 14 and the second elastic member 15 may be arranged symmetrically with respect to the second virtual line 27 in the range of the conveyance direction v in which the annular hole 20 is formed. If the annular cutting line 22, the first elastic member 14, and the second elastic member 15 are line symmetric with respect to the second virtual line 27, the pant product in which the obtained sheet is formed in a pant shape has both leg openings left and right It will be symmetrical and will look good.

  The annular cutting line 22 extends along a part 25 of the first elastic member 14 and the second elastic member 15, and in the other part of the first elastic member 14 and the second elastic member 15, the first elastic member 14 and It is preferable to cross the second elastic member 15. In this case, in the pant product in which the obtained sheet is formed in a pant shape, more elastic members are arranged along the edge of the leg opening, and there is no elasticity in the vicinity of the edge of the leg opening. A region will be formed. As a result, leg gathers are formed around the legs, which makes it easier to prevent leakage of excrement such as urine from the crotch and prevents the wearer's legs from being tightened too much. A feeling improves.

  In the pant product in which the sheet obtained by the production method of the present invention is formed in a pant shape, it is preferable that one or two inelastic regions are provided in the vicinity of the edges of the left and right leg openings, and two each are provided. Is more preferable. By providing the non-elastic region in this way, the effect of preventing leakage of excrement from the crotch and the effect of improving the feeling of wearing around the legs can be obtained in a well-balanced manner.

  One preferred embodiment is shown in FIG. In the embodiment, the annular cutting line 22 is narrower in the width direction w than the first elastic member 14 and the second elastic member 15 on the second virtual line 27, and each of the first elastic member 14 and the second elastic member 15 is 4 Intersect times. The annular cutting line 22 is narrower in the width direction w than the first elastic member 14 and the second elastic member 15 on the second imaginary line 27. It means that the intersection with the virtual line 27 is inside the width direction w from the first elastic member 14 and the second elastic member 15. According to the embodiment, in the pant product in which the obtained sheet is formed in a pants shape, two inelastic regions are formed in the vicinity of the edges of the left and right leg openings.

  Another preferred embodiment is shown in FIG. In this embodiment, the annular cutting line 22 is wider in the width direction w than the first elastic member 14 and the second elastic member 15 on the second virtual line 27, and the first elastic member 14 and the second elastic member 15 are each 2 Intersect times. Note that the annular cutting line 22 is wider in the width direction w than the first elastic member 14 and the second elastic member 15 on the second imaginary line 27. It means that the intersection with the virtual line 27 is outside the first elastic member 14 and the second elastic member 15 in the width direction w. In this case, the first elastic member 14 and the second elastic member 15 do not exist on the second imaginary line 27 of the obtained sheet. According to the embodiment, the pant product in which the obtained sheet is formed in a pant shape is a non-elastic region in the vicinity of the edge on the upper side of the left and right leg openings (upper side when the wearer wears the pant product). Is formed one by one.

  When the annular hole is formed, the first elastic member 14 and the second elastic member 15 are preferably arranged along the first imaginary line 12 except in the vicinity of the annular cutting line 22. It is preferable to arrange | position in the area | region within 50 mm from. More preferably, the first elastic member 14 and the second elastic member 15 are arranged in a straight line in the transport direction v. By arranging the first elastic member 14 and the second elastic member 15 along the first imaginary line 12 except in the vicinity of the annular cutting line 22, the pant product in which the obtained sheet is formed in a pant shape is An elastic member will be arrange | positioned in a pants width direction (left-right direction when a wearer wears a pant product) in a part. As a result, a force that pulls the edge of the leg opening in the pants width direction in the crotch acts, and the edge of the leg opening of the crotch is less likely to sag. Therefore, when putting on the pants product, the foot is less likely to be caught on the leg opening edge, which makes it easy to wear. Moreover, the crotch part is lifted toward the wearer by the expansion and contraction force of the crotch part in the pant width direction, and the fit of the crotch part of the pant product is improved.

  A case where the arc-shaped notch is formed in the hole / notch forming step 5 will be described with reference to FIGS.

  In the case of forming an arc-shaped notch, in the hole / notch forming step 5, it extends along a part 25 of the first elastic member 14, and in the other part of the first elastic member 14, The elastic sheet 16 is cut at the intersecting first cutting line 23, extends along a part 25 of the second elastic member 15, and intersects the second elastic member 15 at the other part of the second elastic member 15. It is preferable to cut the elastic sheet 16 at the second cutting line 24. In this case, the sheet | seat obtained by the manufacturing method of this invention attaches a fastening member, for example, can be used suitably for open type diaper related products, such as a disposable open type diaper and a disposable open type diaper cover. The open-type diaper-related product is composed of a front abdomen, a back part, and a crotch part provided with a pair of leg cutouts, preferably on the left and right sides of the front part or the back part. A pair of fastening members are provided.

  In the open diaper-related product, an elastic member is disposed along the edges of the left and right leg cutout portions, and there is no elastic member in a part near the edges of the left and right leg cutout portions. An elastic region is formed. As a result, leg gathers are formed around the legs, which makes it easier to prevent leakage of excrement such as urine from the crotch and prevents the wearer's legs from being tightened too much. A feeling improves.

  Although the shape of the 1st cutting line 23 and the 2nd cutting line 24 which forms the circular arc-shaped notch 21 will not be specifically limited if it is a part of a ring, it is more preferable that it is not a straight line. The ring only needs to form a geometrically closed region, and examples thereof include a circle, an ellipse, a polygon, and a figure in which the vertexes of the polygon are smoothed.

  When using the sheet | seat obtained by the manufacturing method of this invention for an open type diaper related product, the 1st cutting line 23 cross | intersects the 1st elastic member 14 2 or 4 times, and the 2nd cutting line 24 is 2nd. It is preferable to cross the elastic member 15 twice or four times. In this case, the open-type diaper-related product has one or two inelastic regions in the vicinity of the edges of the left and right leg openings. As a result, the leakage prevention effect of excrement from the crotch and the leg The effect of improving the surrounding wearing feeling can be obtained in a well-balanced manner. Preferably, the first cutting line 23 intersects the first elastic member 14 twice, the second cutting line 24 intersects the second elastic member 15 twice, and the edges of the left and right leg openings of the open diaper-related product One inelastic region is formed in the vicinity.

  One preferred embodiment is shown in FIGS. In this embodiment, the length between the pair of arc-shaped cutouts 21 (that is, the length between the first cutting line 23 and the second cutting line 24) is the third virtual line extending in the width direction w. 28, narrower in the width direction w than the first elastic member 14 and the second elastic member 15, the first cutting line 23 intersects the first elastic member 14 twice, and the second cutting line 24 is connected to the second elastic member 15. Cross twice. In addition, on the said 3rd virtual line 28, it is a width direction line (line extended in the width direction w) from which the length of the width direction w between the 1st elastic member 14 and the 2nd elastic member 15 becomes the minimum. is there. 3 and 4, when the minimum width direction line exists as a continuous area (when the minimum part continuously exists), the conveyance direction bisector of the continuous area is Considered as 3 virtual lines. The length between the pair of arc-shaped cutouts 21 is narrower in the width direction w than the first elastic member 14 and the second elastic member 15 on the third imaginary line 28. It means that the cutting line 23 and the second cutting line 24 are inside the width direction w from the first elastic member 14 and the second elastic member 15. According to the embodiment, one inelastic region is formed in the vicinity of the lower edge of the left and right leg openings of the open diaper-related product.

  Another preferred embodiment is shown in FIG. In this embodiment, the length between the pair of arc-shaped cutouts 21 is wider in the width direction w than the first elastic member 14 and the second elastic member 15 on the third virtual line 28, and the first cutting line 23 is the first cutting line 23. The first elastic member 14 intersects four times, and the second cutting line 24 intersects the second elastic member 15 four times. The length between the pair of arc-shaped notches 21 is wider on the third imaginary line 28 in the width direction w than the first elastic member 14 and the second elastic member 15. It means that the cutting line 23 and the second cutting line 24 are located outside the first elastic member 14 and the second elastic member 15 in the width direction w. According to this embodiment, two inelastic regions are formed in the vicinity of the edges of the left and right leg openings of the open diaper-related product.

  When the arc-shaped notch is formed, except for the vicinity of the arc-shaped notch 21, for example, the first elastic member 14 extends along one end 17 in the width direction of the first sheet 11 as shown in FIGS. 3 and 5. The second elastic member 15 may be disposed along the other end 18 in the width direction of the first sheet 11. In this case, the first elastic member 14 is disposed in an area within 50 mm from one end 17 in the width direction of the first sheet 11, and the second elastic member 15 is disposed in an area within 50 mm from the other end 18 in the width direction of the first sheet 11. It is preferred that More preferably, the first elastic member 14 and the second elastic member 15 are arranged in a straight line in the transport direction v.

  When the arc-shaped cutout is formed, except for the vicinity of the arc-shaped cutout 21, as shown in FIG. 4, for example, the first elastic member 14 and the second elastic member 15 have an arcuate cutout adjacent to the conveyance direction v. Between the notches 21, it may be arranged in a meandering line shape. The meander line is the same as described above. Preferably, the first elastic member 14 and the second elastic member 15 are disposed between the adjacent arc-shaped cutouts 21 with an amplitude of ¼ or more of the width of the first sheet 11. The 1st elastic member 14 and the 2nd elastic member 15 which were provided between the adjacent circular arc-shaped notches 21 improve the fit nature around a wearer's trunk.

  In the cutting step 8, the elastic sheet 16 is cut in the width direction w to obtain a plurality of sheets 29. In the cutting step 8, one sheet 29 is obtained by cutting the continuously manufactured sheets with, for example, a cutting cutter. When forming an annular hole in the hole / notch formation step 5, the elastic sheet 16 is cut in the width direction w across the annular hole 20 in the cutting step 8, and preferably cut on the second imaginary line 27. . On the other hand, when forming the arc-shaped notch in the hole / notch forming step 5, the elastic sheet 16 is cut in the width direction w in the cutting step 8 except for the portion where the arc-shaped notch 21 is provided.

  As shown in FIGS. 1 and 2, when forming the annular hole in the hole / notch forming step 5, the sheet manufacturing method of the present invention further includes folding the elastic sheet in the conveying direction v. It is preferable to include a step of folding the sheet into two (folding step 6); and a step of joining the elastic sheets folded back into two (elastic sheet joining step 7). By providing the folding step 6 and the elastic sheet joining step 7, the sheet obtained by the production method of the present invention is formed into a pants shape, and is applied to pants products such as disposable pants-type diapers, disposable pants-type, disposable pants-type diaper covers, etc. It becomes possible to use suitably. The folding process 6 and the elastic sheet joining process 7 are preferably provided after the hole / notch forming process 5, and are preferably provided before or after the cutting process 8.

  In the folding process 6, the elastic sheet 16 is folded in half along a folding line extending in the transport direction v. Preferably, in the folding step 6, the elastic sheet 16 is folded in half along a folding line extending in the conveyance direction v at the center in the width direction. By the folding process 6, the elastic sheet 16 is folded in half at a portion corresponding to the crotch part of the pant product.

  In the elastic sheet joining step 7, the elastic sheets 16 folded back in half are joined together. The elastic sheet 16 is joined by, for example, heat sealing using a heat sealing machine 31 or applying an adhesive. The elastic sheets 16 are preferably joined along the second imaginary line 27. In this case, the elastic sheets 16 may be joined on the second imaginary line 27, and a predetermined range from the second imaginary line 27. You may join in the inside (for example, within 20 mm) joining area | region. The joining line and joining area | region which join the elastic sheets 16 may be continuous with respect to the width direction w of the elastic sheet 16, or may be intermittent.

  As shown in FIG. 3 to FIG. 5, when the arc-shaped notch is formed in the hole / notch forming step 5, the sheet manufacturing method of the present invention is further obtained by an elastic sheet 16 (obtained by the cutting step 8). It is preferable to include a step of attaching the fastening member 30 (fastening member attaching step 9) to the sheet 29). By providing the fastening member attaching step 9, the sheet obtained by the manufacturing method of the present invention is attached to the fastening member 30, and is suitable for open-type diaper related products such as disposable open-type diapers and disposable open-type diaper covers. Can be used.

  In the fastening member attaching step 9, it is preferable to attach the pair of fastening members 30 to both ends in the width direction of the elastic sheet 16 other than the portion where the arc-shaped notches 21 are provided. Furthermore, a fastening support member may be attached to the elastic sheet 16 at a fastening support site of the fastening member 30. Examples of the combination of the fastening member and the fastening-compatible member include a combination of a male member (hook member) and a female member (loop member) of a hook-and-loop fastener, and a combination of an adhesive and a removable film. When a non-woven fabric is used as the first sheet 11 and a male member of a hook-and-loop fastener is used as the fastening member 30, the first sheet 11 functions as a female member of the hook-and-loop fastener even if a separate member is not provided as the fastening member. obtain.

  When the sheet obtained by the production method of the present invention is used for diapers such as disposable pants-type diapers and disposable open-type diapers, the sheet production method of the present invention further includes an absorbent core 32 disposed on the elastic sheet 16. It is preferable to have the process (absorbent core arrangement | positioning process 10) to set (refer FIG. 2 and FIG. 5). The absorbent core disposing step 10 is preferably provided after the elastic member disposing step 3 and preferably before the cutting step 8. The absorbent core 32 is disposed on the elastic sheet 16 by the absorbent core placement step 10.

  When the elastic sheet 16 includes the first sheet 11 and the second sheet 19, the absorbent core 32 is disposed between the first sheet 11 and the second sheet 19 as shown in FIG. 5. Also good. In this case, the absorbent core disposing step 10 is preferably before the second sheet laminating step 4, and in the second sheet laminating step 4, the first elastic member 14, the second elastic member 15, and the absorbent core The second sheet 19 is stacked with 32 interposed therebetween.

  The absorptive core 32 may also be arrange | positioned on the 2nd sheet | seat 19 of the sheet | seat which the 1st sheet | seat 11 and the 2nd sheet | seat 19 laminated | stacked, as FIG. 2 shows. In this case, for example, the absorbent core 32 may be disposed on the elastic sheet as an absorbent main body sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet.

  When the annular hole is formed in the hole / notch forming step 5, the absorbent core 32 is preferably disposed between the adjacent annular holes 20 (see FIG. 2). On the other hand, when forming the arc-shaped notch in the hole / notch forming step 5, the absorbent core 32 is disposed between the pair of arc-shaped notches 21 facing the width direction w of the first sheet 11. It is preferable to do so (see FIG. 5).

  The absorbent core is not particularly limited as long as it can absorb excrement such as urine, and preferably contains a water absorbent resin. The absorbent core is, for example, a mixture of a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber mixed with a granular water-absorbing resin, with a paper sheet such as tissue paper or a coating sheet such as a liquid-permeable nonwoven sheet. It is obtained by molding into a predetermined shape such as a wrapping, rectangular, hourglass, gourd, or battledore.

  It is preferable that rising flaps are provided along both side edges in the diaper width direction of the absorbent core (the left-right direction when the wearer wears the diaper). For example, the rising flaps may be provided on both side edges of the upper surface of the absorbent core in the diaper width direction, or may be provided on both outer sides of the absorbent core in the diaper width direction. When the absorbent core is sandwiched between the top sheet and the back sheet, the rising flap is joined to the top sheet, for example. The rising flap is preferably composed of a liquid-impermeable plastic film, a water-repellent nonwoven fabric or the like, and more preferably composed of a water-repellent nonwoven fabric. By providing the rising flap, side leakage of urine or the like can be prevented.

  It is preferable that a three-dimensional elastic member is provided on the upper end portion (the end portion on the wearer side when the wearer wears the diaper) in a state where the rising flap is raised. A three-dimensional gather that rises toward the wearer is formed by the contraction force of the three-dimensional elastic member, and side leakage such as urine is prevented. The end of the rising flap in the front-rear direction of the diaper may have an inner surface bonded to, for example, a top sheet, thereby preventing leakage of urine or the like in the front-rear direction.

The 1st embodiment of the manufacturing method of the sheet | seat of this invention is represented. The 2nd embodiment of the manufacturing method of the sheet | seat of this invention is represented. The 3rd embodiment of the manufacturing method of the sheet | seat of this invention is represented. The 4th embodiment of the manufacturing method of the sheet | seat of this invention is represented. The 5th embodiment of the manufacturing method of the sheet | seat of this invention is represented.

Explanation of symbols

1: First sheet feeding step 2: Adhesive application step 3: Elastic member disposing step 4: Second sheet laminating step 5: Hole / notch forming step 8: Cutting step 11: First sheet 14: First elastic member 15: second elastic member 16: elastic sheet 19: second sheet 20: annular hole 21: arc-shaped notch 22: annular cutting line 23: first cutting line 24: second cutting line 26: non-elastic region 29: sheet

Claims (9)

A step of feeding the first sheet in the conveying direction;
The first elastic member and the second elastic member are arranged on the first sheet so as not to intersect the first imaginary line extending in the conveyance direction of the first sheet and to be substantially line symmetric with respect to the first imaginary line. A process of obtaining an elastic sheet by disposing in a continuous meandering line at a predetermined cycle,
The first elastic member and / or the second elastic member extend along a part of the first elastic member and / or the second elastic member so that an annular hole or a pair of arc-shaped cutouts is formed in the conveying direction at the predetermined cycle. Alternatively, in the other part of the second elastic member, a step of cutting the elastic sheet at a cutting line intersecting the first elastic member and / or the second elastic member,
A method for producing a sheet, comprising a step of cutting the elastic sheet in a width direction to obtain a plurality of sheets.   Furthermore, the manufacturing method of the sheet | seat of Claim 1 which has the process of apply | coating an adhesive agent to a said 1st sheet | seat.   Furthermore, the manufacturing method of the sheet | seat of Claim 1 or 2 which has the process of laminating | stacking a 2nd sheet on the said 1st sheet | seat on both sides of the 1st elastic member and the 2nd elastic member.   The manufacturing method of the sheet | seat as described in any one of Claims 1-3 which arrange | positions the said 1st elastic member and the said 2nd elastic member by sine half wave shape, trapezoid wave shape, or those combination. The first elastic member and / or the second elastic member extends along a part of the first elastic member and / or the second elastic member so that the annular hole is formed at the predetermined period in the conveying direction. In the section, the elastic sheet is cut at an annular cutting line intersecting the first elastic member and / or the second elastic member,
Cut the elastic sheet across the annular hole in the width direction to obtain a plurality of sheets,
Further, the step of folding the elastic sheet in half with a fold line extending in the transport direction;
The method for producing a sheet according to any one of claims 1 to 4, further comprising a step of joining the elastic sheets folded in two. The annular cutting line is narrower in the width direction than the first elastic member and the second elastic member on the second imaginary line where the length in the width direction between the first elastic member and the second elastic member is maximum,
The sheet manufacturing method according to claim 5, wherein the annular cutting line intersects each of the first elastic member and the second elastic member four times. The annular cutting line is wider in the width direction than the first elastic member and the second elastic member on the second imaginary line where the length in the width direction between the first elastic member and the second elastic member is maximized,
The sheet manufacturing method according to claim 5, wherein the annular cutting line intersects each of the first elastic member and the second elastic member twice. The first elastic member extends along a part of the first elastic member so that the pair of arc-shaped notches are formed at the predetermined cycle in the conveying direction, and intersects the first elastic member at the other part of the first elastic member. The elastic sheet is cut at one cutting line and extends along a part of the second elastic member, and the elastic sheet is cut at a second cutting line that intersects the second elastic member at the other part of the second elastic member. Cut and
The manufacturing method of the sheet | seat as described in any one of Claims 1-4 which cut | disconnects the said elastic sheet in the width direction except the part in which the circular arc-shaped notch was provided, and obtains a some sheet | seat.   The sheet manufacturing method according to claim 8, wherein the first cutting line intersects the first elastic member twice or four times, and the second cutting line intersects the second elastic member twice or four times.