JP4847193B2 - Wearing article and manufacturing method thereof - Google Patents

Description

  The present invention relates to worn articles such as disposable diapers and pants and a method for producing the same.

2. Description of the Related Art Conventionally, a worn article in which leg holes are formed by removing a corresponding portion by die cutting as in the following document and a method for manufacturing the same are known (for example, Patent Document 1).
JP-A-4-325154 (Abstract)

  However, the method of Document 1 has a problem that the material cost increases because useless trim occurs when the leg holes are formed.

Therefore, in order to solve the above-described problems, a manufacturing method for forming leg holes without causing unnecessary trim is disclosed in Document 2 below.
JP-A-9-224973 (Summary)

  However, the worn article manufactured by the manufacturing method of Document 2 is easy to lift the back body due to the contraction force of the leg gathers (elastic member) when worn, and bites occur in the back body and sufficiently covers the hip. There was a problem that I could not.

On the other hand, the wearing article disclosed by the following literature 3 is conventionally known as an example of a wearing article.
JP 2003-305082 (Abstract)

In the diaper of Document 3, the upper end line of the back body and the waist elastic member are formed along a convex curve. As a result, the upper end line of the front body is pulled up to prevent slippage of the front body.
However, in the diaper of this document 3, since the lower end line forming the leg opening is greatly inclined, the biting occurs and the hip cannot be sufficiently covered.

  Accordingly, an object of the present invention is to provide a wearing article that can suppress biting into the crotch in the back body and can largely cover the hip.

  Another object of the present invention is to provide a novel manufacturing method suitable for manufacturing such worn articles and the like, in which unnecessary trim does not occur.

In order to achieve the above object, a wearing article according to the present invention includes a first torso covering a front part of a wearer's torso, a second torso covering a back part of the wearer's torso, and a wearer's crotch. A wearing article comprising a covering core part, a waist opening formed by the first and second body parts, and a leg opening opposite to the waist opening, the waist part around the second body part The waist elastic member provided along the direction is provided at a center portion provided at the left and right center of the trunk corresponding to the core portion and a pair of left and right side portions of the center portion, and the waist elastic member In the unfolded state where the waist elastic member of the side portion is extended from the center portion, the waist elastic member is obliquely provided so as to become a lower position, and the lower end forming the leg opening in the side portion of the second trunk portion is provided. The line is set in a substantially horizontal direction in the expanded state. Is, the upper end of the lines forming the opening for waist in the central portion in a contracted state where the waist elastic member is contracted is generally horizontal and a generally horizontally waist elastic member in the central portion along the line of the upper end Further, the waist elastic member of the side part is pulled toward the center part and becomes horizontal, so that the line at the lower end is inclined obliquely upward as it goes to the side part.

  In the present wearing article, the lower end line forming the leg opening in the side part of the second body part is set in the horizontal direction in the unfolded state, and the surface covering the hips is enlarged. Even if the waist elastic member of the side part is pulled in the horizontal direction in the horizontal direction in the contracted state in which the elastic member is contracted, the second end line may be inclined obliquely upward as it goes to the side part. The side part of the torso does not bite into the crotch, and the hip can be largely covered by the side part.

  In the present wearing article, “the lower end line is set to be approximately horizontal in the unfolded state” means that the lower end line faces upward as the lower end line goes aside in addition to the case where the lower end line is horizontal. It includes the case where it is slightly inclined (for example, inclined within a range of about 15 ° with respect to the horizontal).

  In the present wearing article, the line at the upper end of the side part may be inclined downward as it goes to the side. In this case, since the line inclined downward in the expanded state becomes a substantially horizontal straight line in the contracted state, the appearance and fit when the wearing article fits to the back portion is improved.

  The manufacturing method of the present invention includes a step of conveying a front web serving as the first body portion, a line of a lower end forming the leg opening facing the front web inwardly, and A step of transporting the back web serving as the second body portion in a state of being spaced apart from the front web in the width direction; and the waist elastic member at the lower end of the back web along the transport direction. And a step of arranging the core portion between the concave portion of the back web and the front web so as to form a concave portion that is concave with respect to the line. ing.

  According to this method, since die cutting for a leg hole is not required, waste of material is eliminated, and material cost can be reduced.

  Another manufacturing method of the present invention includes a first torso that covers the front of the wearer's torso, a second torso that covers the back of the wearer's torso, the first torso and the second torso, And a core part that covers the wearer's crotch and is a method of manufacturing a worn article that is continuous in the transport direction and has a first side edge and a second side edge. Slitting the web along a predetermined wavy cutting line to divide the web into first divided sheets having first concave portions and convex portions and second divided sheets having second concave portions and convex portions; and The first and second side edge portions are arranged between a first cut portion along the cutting line in the first divided sheet and a second cut portion along the cutting line in the second divided sheet. The first and second divided sheets so that the first side edge and the second side edge face each other A step of changing the positional relationship, and a step of disposing the core portion so that the core portion spans between the pair of separate sheets of varying the positional relationship.

  Still another manufacturing method of the present invention includes a first torso that covers the front of the wearer's torso, a second torso that covers the back of the wearer's torso, the first torso and the second torso. And a core part that covers the wearer's crotch and has a first side edge part and a second side edge part that are continuous in the conveying direction. A step of generating a composite sheet by disposing an elastic member in a predetermined region between the first side edge and the second side edge on the belt-shaped web; and a first part in which the region includes a part of the elastic member. By slitting the composite sheet along a predetermined wavy cutting line so as to be divided into an elastic region and a second elastic region including the other part of the elastic member, the first having a first concave portion and a convex portion. A first divided sheet including an elastic region, and a second divided sheet including a second elastic region having a second concave portion and a convex portion. And the first and second side edges are disposed between the first elastic region in the first divided sheet and the second elastic region in the second divided sheet. The step of changing the arrangement relationship of the first and second divided sheets so that the one side edge portion and the second side edge portion face each other, and the first convex portion in the pair of divided sheets in which the arrangement relationship is changed The core portion is arranged so that one core portion straddles between the first concave portion and the second concave portion, and straddles between the first concave portion and the second convex portion in the pair of divided sheets whose arrangement relation is changed. The process of arrange | positioning another core part is provided.

  According to these methods, when the upper end line of the waist opening includes irregularities and curves, the upper end line can be formed along the cutting line at the time of slitting, so that waste of material can be further reduced. It becomes.

  The invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings, in which: However, the examples and figures are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.

Example 1:
Embodiments of the present invention will be described below with reference to the drawings.
1 to 9A show a first embodiment.

Diaper 10 (an example of a worn article) 10:
As shown in FIG. 1, FIG. 2A and FIG. 2B, a wearing article 10 such as a diaper or pants (hereinafter described as a diaper 10) is a first torso S1 that covers the front of the wearer's torso, the wearer It is comprised by the 2nd trunk | drum S2 which covers the back part of the torso, and the core part C which covers a wearer's crotch.
The core portion C is disposed and bonded so as to straddle between the pair of body portions S1 and S2.

  The second body portion S2 includes a center portion 11 provided at the left and right centers of the body and a pair of left and right side portions 12 of the center portion 11. The side parts 12 are each provided with a fastening member 14. As shown in FIGS. 3 and 4, when the diaper 10 is worn, the side parts 12 of the second body part S <b> 2 are stopped at the left and right ends of the second body part S <b> 1 by the fastening member 14 (FIG. 1). The waist opening 13 formed by the first and second body portions S1 and S2 in FIG. 3 is formed, and a leg hole (leg opening) Lh is formed.

Elastic members F1 to F3:
In FIG. 1, each of the elastic members F1 to F3 described below is composed of, for example, a plurality of elastic yarns and elastic films. In FIG. 1, a portion represented by a halftone dot represents a portion where each of the elastic members F1 and F2 is finely cut and the contracting force is substantially lost.

Waist elastic member F1;
As shown in FIG. 1, a waist elastic member F <b> 1 is disposed along the waistline direction L in the body portions S <b> 1 and S <b> 2. The waist elastic member F1 is provided at the end of the first and second body portions S1, S2 on the side of the waist opening 13 and / or at a site away from the leg hole Lh.
The waist elastic member F1 provided in the second body portion S2 is provided so as to become a lower position as it moves away from the central portion 11 toward the side portion 12 in the expanded state where the waist elastic member F1 shown in FIG. 1 is expanded. It has been. That is, the waist elastic member F1 is provided obliquely toward the first torso S1 side when worn in FIG. 1 are cut obliquely toward the end portion in the waistline direction L along the waist elastic member F1.

Hip elastic member F2;
The first side edge W1s side of the second body portion S2 is formed substantially linearly in the horizontal direction L. That is, the lower end line 32 forming the leg hole Lh in the side portion 12 is connected to the lower end line 32 of the central portion 11 and is set in a substantially horizontal direction L.
A hip elastic member F <b> 2 is provided on the first side edge W <b> 1 s side of the second body portion S <b> 2 substantially in parallel along the lower end line 32. Accordingly, the hip elastic member F2 is provided in a substantially straight line in the horizontal direction L. The left and right ends of the hip elastic member F2 are curvedly arranged slightly upward toward the waist opening 13 side.

  In the contracted state in which the waist elastic member F1 is contracted, the waist elastic members F1 of the side portions 12, 12 are pulled toward the central portion 11 as shown by the arrow D1 in FIG. Get closer. Therefore, as shown in FIG. 5, the line 31 at the upper end of the second body portion S2 is substantially horizontal. On the other hand, due to the contraction of the waist elastic member F1, the lower end line 32 is inclined obliquely upward as it goes to (becoming) the side portion 12.

  Here, the line 32 at the lower end of the second body portion S2 is set substantially in the horizontal direction in the developed state of FIG. Therefore, as shown in FIG. 4, in the contracted state in which the hip elastic member F2 is contracted, the lower end line 32 is inclined obliquely upward as it goes to the side part 12, but the second torso S2 greatly covers the hip, The side part 12 of the second body part S2 does not bite into the crotch.

Moreover, as shown in the unfolded state of FIG. 1, the hip elastic member F2 is provided in the horizontal direction L along the lower end line 32 in an approximately uninterrupted manner. The hip elastic member F2 fits along the lower end of the wearer's buttocks. Therefore, it is possible to further prevent the side portion 12 of the second trunk portion S2 from biting into the crotch.
It should be noted that the hip elastic member F2 in the core portion C may be invalidated by cutting with heat or the like.

Core part C:
Leg elastic member F3;
As shown in FIG. 1, leg elastic members F <b> 3 are disposed at both ends of the core portion C on the leg hole Lh side.

Absorber 15;
As shown in FIGS. 2A and 2B, the core C is provided with an absorber 15 capable of absorbing bodily fluids discharged from the body. The absorber 15 only needs to be capable of absorbing and holding the liquid. The absorber 15 may have a fluff pulp and / or a superabsorbent polymer obtained by pulverizing pulp.

  The core part C has a sheet-like material constituting the top sheet 16 and the back sheet 17 of the wearing article. The top sheet 16 can permeate the body fluid of the wearer, for example, urine or blood. The top sheet 16 may have a function of preventing the liquid from flowing backward. As the back sheet 17, for example, a polyethylene sheet that does not transmit liquid can be used.

Production method:
As shown in FIG. 6A, a composite sheet (an example of a strip-shaped web) W is formed in a state where a plurality of elastic members F are sandwiched between a pair of webs Wu and Wd along the first conveying direction L1. F is formed by adhering to both webs Wu and Wd. The composite sheet W is continuous in the first transport direction L1 and has a strip shape having a first side edge W1s and a second side edge W2s at both ends in the width direction X substantially perpendicular to the first transport direction L1. It is formed.

  As shown in FIGS. 6B and 7A, the elastic member F includes a first elastic member G1 that becomes the waist elastic member F1 after processing, and a first elastic member G2 that is provided at both ends of the first elastic member G1 and becomes the hip elastic member F2 after processing. 2 elastic members G2. The first elastic member G1 is disposed in a corrugated region so as to be uneven with respect to the first side edge W1s and the second side edge W2s. On the other hand, the second elastic member G2 is linearly arranged along the side edge portions W1s and W2s in the portion that becomes the lower end line 32 (FIG. 1).

  As shown in FIG. 6A, the elastic member F is finely cut at a predetermined portion indicated by a broken line in FIG. 7B and a halftone dot in FIG. 1 by the roller 20 that breaks the elastic member, and the contraction force is substantially reduced in the cut portion. Disabled.

The composite sheet W shown in FIG. 9A is conveyed in the longitudinal directions (first and second conveying directions) L1 and L2 while being stretched while being pulled in the longitudinal directions L1 and L2.
The composite sheet W is slit along a predetermined wavy first cutting line CL1 in the stretched state.

  As shown in FIG. 8A, the composite sheet W is divided into a first divided sheet W1 and a second divided sheet W2 by the slit.

  Due to the slit, a first elastic region 21 including a part of the first elastic member G1 is formed in the first divided sheet W1. A first cut portion W1c along the first cut line CL1 is formed at the other end of the first side edge portion W1s in the first divided sheet W1. A first recess 1B and a first protrusion 1A are formed in the first cutting portion W1c.

On the other hand, a second elastic region 22 including the other part of the first elastic member G1 is formed in the second divided sheet W2. A second cut portion W2c along the first cut line CL1 is formed at the other end of the second side edge portion W2s in the second divided sheet W2. 2nd convex part 2A and 2nd recessed part 2B are formed in the 2nd cutting part W2c.
Both the cutting parts W1c and W2c are located between the first side edge part W1s and the second side edge part W2s.

  Since the first elastic member G1 is disposed in the corrugated region so as to be uneven with respect to the first side edge W1s and the second side edge W2s, the corrugated region is divided into two. The composite sheet W (FIG. 7B) is divided into a first divided sheet W1 and a second divided sheet W2.

Thereafter, as shown in FIG. 9A, the first and second divided sheets W1, W2 are folded back by the first and second folding rollers R1, R2, respectively. The folding rollers R1 and R2 are installed, for example, at substantially parallel angles.
For easy identification, one side of the composite sheet W and the two divided sheets W1 and W2 is hatched.

  The first divided sheet W1 is turned upside down by the first folding roller R1, folded back at a predetermined angle, and conveyed in the second conveying direction L2. On the other hand, the second divided sheet W2 is turned upside down by the second folding roller R2, and is folded back at substantially the same angle as the angle at which the first divided sheet W1 is folded, toward the second conveying direction L2. Be transported. The folding position (the position of the roller R1) of the first divided sheet W1 is provided upstream of the folding position (the position of the roller R2) of the second divided sheet W2.

By the folding, as shown in FIG. 8B, the front and back of both divided sheets W1 and W2 are reversed, and the first and second side edge portions W1s are between the first cut portion W1c and the second cut portion W2c. , W2s are arranged. That is, by such folding, the arrangement relationship between the first and second divided sheets W1 and W2 is changed so that the first side edge W1s and the second side edge W2s face each other.
On the other hand, by installing the two folding rollers R1 and R2 in FIG. 9A at a predetermined interval upstream and downstream in the first conveying direction L1, both divided sheets W1 and W2 are folded back by the folding. The width is increased in the width direction X substantially orthogonal to the subsequent second transport direction L2.

  After the folding, as shown in FIG. 8B, one core portion C straddles between the first convex portion 1A and the second concave portion 2B in the pair of divided sheets W1, W2 whose positional relationship is changed. The core part C is disposed on the surface. On the other hand, another core portion C indicated by a two-dot chain line is disposed between the first concave portion 1B and the second convex portion 2A adjacent to these.

  Thereafter, the two divided sheets W1 and W2 are cut along the second cutting line CL2 substantially orthogonal to the second transport direction L2 and cut into individual diapers 10. In such a case, part of the divided sheets W1 and W2 may be cut. By the cutting, the first and second divided sheets W1 and W2 become the first and second body portions S1 and S2, respectively.

As shown in FIG. 9B, the front and back of both divided sheets W1, W2 may be reversed without changing the direction of the conveyance direction L. In this case, the rollers R1 and R2 may be arranged at the same position in the transport direction L.
In addition, the change in the arrangement relationship between the divided sheets W1 and W2 and the widening need not be performed simultaneously, and may be performed separately in separate steps. Further, after reversing the front and back, the interval between the two divided sheets W1, W2 may be narrowed.

Example 2:
FIG. 9C shows Example 2.
As shown in FIG. 9C, in this embodiment, the two sheets W1 and W2 intersect each other up and down without reversing the front and back of the two divided sheets W1 and W2. Changes have been made. Due to the intersection, the side edges W1s and W2s are arranged to face each other between the cut portions W1c and W2c of the divided sheets W1 and W2.
Along with the intersection of both divided sheets W1, W2, the interval in the width direction X of both divided sheets W1, W2 is widened to a predetermined interval.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same portions or corresponding portions, and the description thereof is omitted.

Example 3:
FIG. 10 shows a third embodiment.
As shown in FIG. 10, the front web WF serving as the first body S1 and the back web WB serving as the second body S2 are transported substantially in parallel.
In the state where the lower lines 32 and 33 forming the leg openings Lh are opposed inward to the front web WF and are spaced apart from each other in the width direction X with respect to the front web WF, The back web WB to be S2 is conveyed.
The back web WB is disposed in a corrugated manner so that the concave portion 200 is formed along the conveyance direction L so that the waist elastic member F1 is concave with respect to the line 32 at the lower end.
The core portion C is disposed between the concave portion 200 and the front web WF in the back web WB. Note that the hatched portion in FIG. 10 may be trimmed.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same portions or corresponding portions, and the description thereof is omitted.

  In addition, after folding the core part C and overlapping the first body part S1 on the second body part S2, the diaper 10 is made into a pants type by joining both ends of the first body part S1 and the second body part S2. It may be formed. Further, the waist elastic member F1 may be formed in a concave or convex wave shape for the first body S1 of FIG. 1 and the front web WB of FIG.

  The present invention can be applied to manufacture of a wearing article having a core portion.

It is a schematic plan view which shows an example of the wear | wearing article of the expansion | deployment state concerning Example 1 of this invention. 2A is a sectional view taken along line IIA-IIA of the wearing article in FIG. 1, and FIG. 2B is a sectional view taken along line IIB-IIB of the wearing article in FIG. It is the schematic perspective view which looked at the wearing article in the wearing state from diagonally forward. It is the schematic perspective view which looked at the wearing article in the wearing state from the slanting back. It is a schematic perspective view of the wearing article which shows the state contracted to the non-wearing state. FIG. 6A is a schematic perspective view showing an example of a method for producing a composite sheet, and FIG. 6B is a longitudinal sectional view of the composite sheet. It is a schematic plan view which shows the manufacturing method of a wearing article. It is a schematic plan view which shows the manufacturing method of a wearing article. 9A is a schematic perspective view illustrating a method for manufacturing a worn article, FIG. 9B is a schematic perspective view illustrating a method for manufacturing a worn article according to a modification, and FIG. 9C is a schematic perspective view illustrating a method for manufacturing a worn article according to Example 2. It is. It is a schematic plan view which shows the manufacturing method of the wearing article concerning Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A: 1st convex part 1B: 1st recessed part 2A: 2nd convex part 2B: 2nd recessed part 11: Center part 12: Side part 21: 1st elastic area 22: 2nd elastic area 32: Line of lower end 31: Upper end Line 200: Concave portion C: Core portion CL1: First cutting line F: Elastic member F1: Waist elastic member F2: Hip elastic member L: Girth direction Lh: Leg hole (opening for leg)
S1: 1st body part S2: 2nd body part W: Composite sheet, belt-like web W1: 1st division sheet W1c: 1st cutting part W1s: 1st side edge part W2: 2nd division sheet W2c: 2nd cutting Part W2s: Second side edge WB: Back web WF: Front web Wu, Wd: Web

Claims (6)

A first torso covering the front of the wearer's torso, a second torso covering the back of the wearer's torso, a core covering the wearer's crotch, and the first and second torso parts. A wearing article comprising a waist opening and a leg opening opposite to the waist opening,
The waist elastic member provided along the waistline direction on the second body part includes a center part provided at the left and right centers of the body corresponding to the core part, and a pair of left and right side parts of the center part. Provided in an expanded state in which the waist elastic member is expanded, and is provided obliquely so that the waist elastic member of the side portion is positioned downward as it moves away from the center portion,
The lower end line forming the leg opening in the side part of the second body is set in a substantially horizontal direction in the unfolded state, and the waist opening in the central part is formed in the contracted state in which the waist elastic member contracts. The waist elastic member at the upper end is generally horizontal, and the waist elastic member at the central portion is arranged substantially horizontally along the upper end line, and further, the waist elastic member at the side portion is pulled toward the central portion. The wear article which inclines diagonally upward as the line of the said lower end goes to the said side part by approaching horizontally.   The wearing article according to claim 1, wherein a hip elastic member is disposed along the lower end line on the side portion. A method for producing the worn article of claim 1, comprising:
Transporting a front web serving as the first body portion;
The back body serving as the second body portion with the lower end line forming the leg opening facing inwardly facing the front web and spaced apart in the width direction with respect to the front web A step of conveying the web;
Arranging the waist elastic member in a wave shape so that a concave portion that is concave with respect to the line of the lower end is formed in the back web along the conveying direction;
The manufacturing method of the wearing article provided with the process of arrange | positioning the said core part between the said recessed part in the said web for backs, and the said web for fronts. The first torso that covers the front of the wearer's torso, the second torso that covers the back of the wearer's torso, and the first torso and the second torso are disposed over the wearer. A method for manufacturing a worn article comprising a core portion covering the crotch of
A first divided sheet having a first concave portion and a convex portion by slitting a belt-like web having a first side edge portion and a second side edge portion along a predetermined wavy cutting line while continuing in the conveying direction; A step of dividing into a second divided sheet having a second concave portion and a convex portion;
The first and second side edge portions are disposed between a first cutting portion along the cutting line in the first divided sheet and a second cutting portion along the cutting line in the second divided sheet. And changing the arrangement relationship of the first and second divided sheets so that the first side edge and the second side edge face each other;
And a step of arranging the core portion so that the core portion straddles between the pair of divided sheets whose arrangement relation is changed. The first torso that covers the front of the wearer's torso, the second torso that covers the back of the wearer's torso, and the first torso and the second torso are arranged and worn. A method for manufacturing a worn article comprising a core portion covering a person's crotch,
An elastic member is arranged in a predetermined region between the first side edge and the second side edge on a belt-like web that is continuous in the conveying direction and has a first side edge and a second side edge. Generating
The composite sheet is slit along a predetermined wavy cutting line so that the region is divided into a first elastic region including a part of the elastic member and a second elastic region including the other part of the elastic member. Dividing the first divided sheet including the first elastic region having the first concave portion and the convex portion into the second divided sheet including the second elastic region having the second concave portion and the convex portion; and
The first and second side edges are disposed between the first elastic region of the first divided sheet and the second elastic region of the second divided sheet, and the first side edge and the first Changing the arrangement relationship of the first and second divided sheets so that the two side edges face each other;
The core portion is arranged so that one core portion straddles between the first convex portion and the second concave portion in the pair of divided sheets having the arrangement relationship changed, and the pair of the arrangement relationship is changed. The manufacturing method of the wearing article provided with the process of arrange | positioning another core part so that it may straddle between the said 1st recessed part and 2nd convex part in a division sheet.   6. The elastic member according to claim 5, wherein the elastic member is disposed in a corrugated region so as to be uneven with respect to the first side edge and the second side edge, and divides the corrugated region into two. A method for manufacturing a worn article, wherein the composite sheet is divided into the first divided sheet and the second divided sheet.

Images