CN101909564B - The manufacture method of disposable wearing article - Google Patents

Abstract

The present invention provides a method of manufacturing a wearing article comprising: a first body part (S1) covering a part of a wearer's body; a second body part (S2) covering other parts of the wearer's body; and Covers the center portion (C) of the wearer's crotch. This manufacturing method includes a step of producing a composite sheet, in which a pull-up elastic member (FU) for preventing the wearing article from slipping down when worn is arranged along a predetermined waveform during conveyance. The fabric formed; the process of dividing into the first split piece and the second split piece; the process of making the two split pieces relatively move in the width direction (D) perpendicular to the length direction (L); the first split A step of shifting the phases of the sheet and the second split sheet in the moving direction from each other; and a step of arranging the central portion (C) to obtain a laminate.

Description

Disposable wearable article manufacturing method

technical field

The present invention relates to a method for manufacturing disposable wearing articles such as disposable diapers and pants.

Background technique

Conventionally, there has been proposed a wearing article in which an elastic member is disposed for improving fit.

Patent Document 1: Japanese Patent Application Laid-Open No. 2006-122456 (Abstract)

Patent Document 2: W02007/069496 (Abstract)

Contents of the invention

In the diaper of Patent Document 1, the elastic member is arranged in a curved manner so as to approach the crotch portion from the vicinity of the waist opening of the front and rear body joints of the waist toward the center in the width direction of the diaper. The overlapping portion of the elastic member and the absorbent main body is an unnecessary part because wrinkles are generated in the absorbent main body. Therefore, after arranging the above-mentioned elastic member on the web (web), it is cut in the central region in the width direction, thereby in the region where the elastic member overlaps with the absorbent main body, the expansion and contraction of the elastic member cannot be expressed. force.

However, at least in the manufacturing stage, it is necessary to arrange the above-mentioned elastic member across the center of the width direction of the diaper on the fabric, so the elastic member in this part is wasted.

The diaper disclosed in Patent Document 2 discloses a method of arranging an elastic member in a wave shape on a web, and further cutting the web with an amplitude smaller than that of the elastic member along the moving direction.

Here, when the wearer's bodily fluid is absorbed by the absorbent body, the diaper may slide down due to the weight of the bodily fluid. However, in the diaper of Patent Document 2, since the above-mentioned elastic members function only as leg circumference elastic members for preventing leakage in the width direction, the diaper cannot be prevented from sliding down.

Therefore, an object of the present invention is to provide a method of manufacturing a wearing article that prevents the diaper from slipping and does not waste materials.

The manufacturing method of the wearing article of the present invention, it comprises: the first body part that covers a part of the wearer's body; the second body part that covers the other parts of the wearer's body; ) section, the manufacturing method of the wearing article is characterized in that it includes: the process of conveying a belt-shaped fabric that is continuous in the conveying direction and has a first side edge part and a second side edge part; The pull-up elastic members which are continuous in the longitudinal direction of the fabric and are used to prevent the wearing article from slipping downward during wearing are arranged on the fabric being conveyed along a predetermined waveform, and the plurality of first tops of the waveform are arranged on the above-mentioned fabric. The first side edge portion or the vicinity of the first side edge portion, and the adjacent second top of the first top portion is arranged at the above-mentioned second side edge portion or the vicinity of the second side edge portion; the cutting process, in the cutting process In the above-mentioned composite sheet, the above-mentioned composite sheet being conveyed is cut along a cutting line continuous in the longitudinal direction of the above-mentioned composite sheet, and it is divided into first divided sheets having the above-mentioned first side edge portion and the above-mentioned plurality of first tops. and the second split piece having the second side edge portion and the plurality of second tops, and cutting the above-mentioned pull-up elastic member; The process of making the above-mentioned two split pieces move relative to each other in the width direction perpendicular to the above-mentioned longitudinal direction by means of distance; making the above-mentioned first split piece and the above-mentioned second split piece a step in which the phases in the moving direction of the sheets are shifted from each other; and a step in which the above-mentioned center portion is arranged to straddle the first region and the second region to obtain a laminated body, wherein the first region refers to a step in the first divided sheet The area between the above-mentioned first top and the first top is not configured with elastic members for pulling up, and the second area refers to the area between the above-mentioned second top and the second top in the above-mentioned second split piece. Areas with elastic components.

According to this method, since the pull-up elastic member is provided continuously in the longitudinal direction of the fabric to prevent the wearing article from sliding down when worn, it is possible to prevent the wearing article from sliding down due to the weight of the wearer's bodily fluids.

In addition, the above-mentioned pull-up elastic member is arranged along a predetermined waveform, and the phases in the moving direction of the first split piece having the first top and the second split piece having the second top are shifted from each other, thereby separating the center portion. Arranged in a region where no pull-up elastic member is arranged. Therefore, the elastic member is less likely to be wasted.

Here, "wearing article" refers to semi-finished products and finished products including disposable wearing articles such as disposable diapers and shorts.

In a preferred embodiment of the above manufacturing method, each of the split pieces further includes: a waist elastic member extending along the waist in the waist direction on each of the body parts; The lower waist elastic member in the lower region, in the process of producing the composite sheet, further includes: according to the above-mentioned pull-up elastic member, obliquely crossing at least two parts of the waist lower elastic member in the width direction of the split sheet The process of arranging the above-mentioned pull-up elastic member in the same manner.

In the case of this example, since the elastic member for pull-ups crosses the waist elastic member FB obliquely, it can prevent that a diaper and shorts slide down.

That is, the pull-up elastic member applies an obliquely upward force to each body part at a larger inclination angle than the waist elastic part, thereby lifting each body part, thereby enabling the diaper and shorts to be closely held. on the wearer's waist.

In a preferred embodiment of the above-mentioned manufacturing method, it further includes: folding the above-mentioned laminated body at the middle of the length direction of the above-mentioned central part in such a manner that a part of the above-mentioned first top part and a part of the above-mentioned second top part are close to each other and then overlap each other. and a process of stacking two layers: separating the portion of the first divided piece that becomes the end in the waist direction of the first body portion and the second divided piece in such a manner that the first top portion is substantially connected to the second top portion; A step of joining the parts that will be the ends in the waist direction of the second trunk portion of the sheet to each other; In the process of the part of the wearing article, the above-mentioned central part includes the elastic member for legs extending in the above-mentioned width direction, and in the process of obtaining the above-mentioned laminated body, the above-mentioned cut end of the above-mentioned pull-up elastic member and the The center portion is arranged such that the leg elastic members are connected to each other, whereby an annular elastic region is formed by the pull-up elastic member and the leg elastic member of the wearing article.

In the case of this example, by forming the above-mentioned annular elastic region, the function of preventing the wearing article from slipping can be improved, and leakage of bodily fluid can be reliably prevented.

Description of drawings

FIG. 1 is a schematic perspective view showing an example of a wearing article manufactured by a method of manufacturing a wearing article according to the present invention.

Fig. 2A is a cross-sectional view taken along line IIA-IIA of the wearing article shown in Fig. 2B, and Fig. 2B is a schematic plan view of the wearing article unfolded.

Fig. 3A is a schematic side view showing a method of manufacturing a composite sheet, and Fig. 3B is a schematic plan view showing a manufacturing process of a wearing article.

Fig. 4 is a schematic plan view showing a manufacturing process of the wearing article.

Fig. 5 is a schematic plan view showing a manufacturing process of the wearing article.

Fig. 6 is a schematic plan view showing a manufacturing process of the wearing article.

Fig. 7 is a schematic plan view showing a manufacturing process of the wearing article.

Fig. 8 is a schematic plan view showing a manufacturing process of the wearing article.

Explanation of reference signs:

10 laminates

C Center

CL cutting line

D width direction

E1 first area

E2 second area

FA annular elastic region

FB lower waist elastic

Elastic parts for FL legs

Elastic parts for FU pull-up

FW waist elastic

L length direction

S1 first body

S2 second body

W fabric

W1 first partition

W2 second partition

W1s first side edge

W2s second side edge

Ws composite film

X conveying direction

#1 first top

#2 second top

detailed description

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

Example 1

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1, FIG. 2A, and FIG. 2B show an example of a wearing article manufactured by this manufacturing method.

As shown in Figure 1, the wearing article of the present embodiment 1 is formed into a shorts type, comprising: a first trunk part S1 covering a part of the wearer's trunk part; a second trunk part S2 covering other parts of the wearer's trunk part ; and the center portion C covering the crotch of the wearer.

In the above-mentioned trunk parts S1, S2, there are provided in parallel with each other: a plurality of waist elastic members FW along the wearer's waist; B extends and is arranged on at least the lower waist region of the wearer.

As shown in FIG. 2B , the unfolded above-mentioned wearing article is composed of a first body part S1 , a second body part S2 , and a center part C, and is formed into a so-called hourglass shape. The absorber C1 is provided in the said center part C.

A plurality of waist elastic members FW and a plurality of lower waist elastic members FB are arranged at predetermined intervals along the longitudinal direction L of the first trunk portion S1 and the second trunk portion S2. The area where the lower waist elastic members FB are arranged is arranged such that each of the pull-up elastic members FU traverses obliquely across the plurality of lower waist elastic members FB in the width direction D of the first body portion S1 and the second body portion S2. Almost most of the lower waist elastic member FB.

On the other hand, as shown in FIG. 2A and FIG. 2B , the elastic members FL for legs extending in the width direction D are arranged in the central part C. As shown in FIG.

Therefore, when the above-mentioned wearing article is formed into a shorts shape by welding the ends S1e, S2e of the first body part S1 and the second body part S2 to each other as shown in FIG. The leg elastic member FL forms an annular elastic region FA.

Manufacturing method

Next, an example of the manufacturing method of the said wearing article is demonstrated.

The manufacturing process of composite sheet Ws:

As shown in FIG. 3A, a plurality of waist elastic members FW, lower waist elastic members FB, and pull-up elastic members FU are sandwiched between two belt-shaped fabrics W conveyed in the conveying direction X to form a composite sheet. Ws.

That is, as shown in FIG. 3B , first, the waist elastic member FW and the lower waist elastic member FB are arranged on one web W. The said web W is continuous in the conveyance direction X, and has the 1st side edge part W1s and the 2nd side edge part W2s. A pair of waist elastic members FW are arranged near the first side edge W1s and the second side edge W2s of the fabric W, respectively, and a lower waist elastic member FB is arranged between the pair of waist elastic members FW.

After arranging the above-mentioned waist elastic member FW and lower waist elastic member FB on the fabric W, as shown in FIG. The above-mentioned composite sheet Ws is formed by incorporating the respective elastic members FW, FB, and FU.

In the process of producing the said composite sheet Ws, the elastic member FU for pull-up is arrange|positioned on the fabric W so that it may cross substantially the whole lower waist part elastic member FB obliquely in the width direction D.

The pull-up elastic member FU is arranged on the web W being transported along a waveform having a predetermined wavelength λ. The plurality of first tops α1 of the waveform are arranged near the first side edge W1s, and the plurality of second tops α2 adjacent to the first tops α1 are arranged near the second side edge W2s.

In addition, the above-mentioned waveform λ may be, for example, a shape in which rounded first apex α1 and second apex α2 are connected by a straight line, or may be a sinusoidal curve or the like.

Splitting process:

The composite sheet Ws being conveyed is cut along the cutting line CL continuous in the longitudinal direction L of the above-mentioned composite sheet Ws together with the elastic member FU for pull-up. By the above cutting, the composite sheet Ws is divided into the first divided piece W1 and the second divided piece W2.

By this division, the composite sheet Ws is divided into: a first divided sheet W1 having a first side edge W1s and a plurality of first tops α1; and a second divided sheet W1 having a second side edge W2s and a plurality of second tops α2. Split slice W2.

Widening process:

After the above division, as shown in FIG. 5, the two division pieces W1, W2 are arranged in the width direction D in such a manner that the distance width d1 from the first side edge part W1s to the second side edge part W2s is increased. Perform relative movement (expand width).

Phase stagger process:

Next, in such a way that the first apex α1 of the first segment W1 and the second apex α2 of the second segment W2 face each other, the phases in the moving direction X of the first segment W1 and the second segment W2 are shifted from each other. . That is, as shown in FIGS. 4 and 5 , the phase of the movement direction X of one segmented slice W1 ( W2 ) is shifted by half wavelength λ/2 from that of the other segmented segment W2 ( W1 ).

Thereby, as shown in FIG. 5 , the first apex α1 of the first divided piece W1 and the second apex α2 of the second divided piece W2 are arranged substantially line-symmetrically.

In addition, as a method of shifting the phases of the split pieces W1 and W2, for example, a method may be adopted in which one of the split pieces W2 (W1) passes through a not-shown dummy roller, whereby the above-mentioned one split piece W2 (W1) ) is lagging behind another split slice W1 (W2).

As shown in FIG. 6, the 1st divided piece W1 has the 1st area|region E1 in which the elastic member FU for pull-ups is not arrange|positioned between the 1st top part α1 and the 1st top part α1. On the other hand, the 2nd split piece W2 has the 2nd area|region E2 in which the elastic member FU for pull-ups is not arrange|positioned between 2nd top part α2 and 2nd top part α2.

After the step of shifting the phase described above, the lower waist elastic member FB is cut in the first region E1 and the second region E2 to lose the tension of the lower waist elastic member FB. Then, the center part C is arranged in the above-mentioned first area E1 and second area E2.

In this way, the above-mentioned central portion C is arranged so as to straddle the first region E1 of the first divided piece W1 and the second region E2 of the second divided piece W2, thereby forming the laminated body 10 .

In addition, as a method of cutting the lower waist elastic member FB, for example, a method may be employed in which the lower waist elastic member FB is not joined to the fabric W in the portions corresponding to the first region E1 and the second region E2 in advance. The lower waist elastic member FB is cut off in the first region E1 and the second region E2 so that the lower waist elastic member FB is not disposed in the first region E1 and the second region E2. In addition, the tension of the lower waist elastic member FB may be substantially lost by cutting the lower waist elastic member FB thinly in the first region E1 and the second region E2.

As shown in FIG. 7 , the laminated body 10 is conveyed downstream, and the first side edge portion W1s and the second side edge portion W2s are respectively folded toward the center portion C (inwardly of the fabric).

Then, according to the manner that the first apex α1 and the second apex α2 in FIG. 7 overlap each other, and as shown in FIG. Fold in direction D. After this folding, the first divided piece W1 and the second divided piece W2 between the respective central portions C, C are cut along the cutting line Ch, thereby forming individual shorts. Simultaneously with this cutting, portions on both sides of the cutting line Ch, that is, portions serving as ends in the waist direction B of the first body portion S1 and the second body portion S2 in FIG. 1 are welded to each other. By this welding, the mutually overlapped first apex α1 and second apex α2 are substantially connected to each other to form an annular elastic region FA.

In addition, various processing may be performed on the wearing article. For example, as shown in FIG. 1, FIG. 2A, and FIG. 2B, a cover sheet Sc, a top sheet St, a three-dimensional sheet Sg, etc. may be arrange|positioned. Moreover, the elastic member FG for gathers may be provided in the said three-dimensional sheet Sg.

In addition, the lower waist elastic member FB may be a film sheet. In this case, the thin film sheet is not arranged in the first region and the second region where the central portion is arranged.

In addition, in the above description, as an example of the wearing article, a shorts-type diaper was illustrated, but as the above-mentioned wearing article, in addition to the above-mentioned shorts-type diaper, for example, it may be fixed on the front of the waist portion when wearing. Types of diapers for the front and rear.

Industrial availability

The present invention can be applied to the manufacture of disposable wearing articles having absorbent bodies.

Claims (1)

1. A method of manufacturing a wearing article comprising: a first body part covering a part of a wearer's body; a second body part covering other parts of the wearer's body; and a crotch covering the wearer The central part, the manufacturing method of the wearable article is characterized by comprising: A process of conveying a belt-shaped fabric that is continuous in the conveying direction and has a first side edge portion and a second side edge portion; A step of producing a composite sheet: arranging a plurality of elastic members for pulling up, which are continuous in the longitudinal direction of the fabric and used to prevent the article of wear from slipping downward when worn, along a predetermined waveform on the fabric being transported, a plurality of first tops of the waveform are arranged at or near the first side edge, and a plurality of adjacent second tops of the first tops are arranged at the second the side edge portion or the vicinity of the second side edge portion; In the cutting step, after the step of producing the composite sheet, in the cutting step, the composite sheet being conveyed is cut along a cutting line continuous in the longitudinal direction of the composite sheet, and divided into a first divided piece having the first side edge portion and the plurality of first tops and a second divided piece having the second side edge portion and the plurality of second tops, and the upper Pull to cut off with elastic parts; a step of relatively moving the two split pieces in a width direction perpendicular to the longitudinal direction so as to increase a distance from the first side edge to the second side edge; a step of shifting phases in moving directions of the first split piece and the second split piece from each other in such a manner that the first top portion and the second top portion face each other; and A step of obtaining a laminate by arranging the central portion across a first region and a second region, wherein the first region refers to the first top portion and the first top portion in the first divided sheet The region between which the elastic member for pulling up is not arranged, the second region refers to the region between the second top and the second top in the second partition sheet where the elastic member for pulling up is not arranged area, Here, each of the divided slices also includes: a waist elastic member extending in the waist direction along the waist at each of said body portions; and a plurality of lower waist elastic members extending in the waist direction of each of the body parts and provided in a region of the lower waist, In the process of producing the composite sheet, the plurality of pull-up elastic members traverse most of the lower waist elastic members obliquely in the width direction, and the step of arranging the plurality of pull-up elastic members along the predetermined waveform so that the plurality of pull-up elastic members traverse most of the lower waist elastic members twice at one wavelength, Here, also include: a step of folding and stacking the laminated body in two layers at the middle of the length direction of the central part in such a manner that a part of the first top part and a part of the second top part are close to and overlap each other; A part of the first divided piece that becomes an end in the waist direction of the first body part and a portion of the second divided piece that become a process of joining end portions in the waist direction of the second body portion to each other; and a step of cutting the first split sheet and the second split sheet along the width direction, and cutting out parts to become individual wearing articles from the laminated body, The central portion includes elastic members for legs extending in the width direction, In the step of obtaining the laminated body, the cutting of the plurality of pull-up elastic members obliquely crossing the majority of the lower waist elastic members in the width direction is performed. The central portion is arranged in such a manner that the end portion of the center portion is connected to the leg elastic members of the central portion, whereby the plurality of pull-up elastic members of the wearing article and the leg elastic members The part forms an annular elastic region.