JPWO2014010340A1 - Wearing article using composite elastic member and method for manufacturing the wearing article - Google Patents

Abstract

Provided is a composite stretchable member formed by sandwiching an elastic member between both sheet materials and joining both sheet materials, and is less likely to be cut. The composite stretchable member 1 is composed of two long sheet materials 2 and 2a aligned in the longitudinal direction, and a plurality of elastic members 3 extending in the longitudinal direction of both sheet materials 2 and 2a are substantially parallel to each other. And sandwiched between both sheet materials 2 and 2a. The two sheet materials 2 and 2a are joined to each other at a joint portion 4 made of a hot melt material continuously applied along a direction orthogonal to the longitudinal direction of the sheet materials 2 and 2a. The joint 4 passes through the plurality of elastic members 3. Between the joint portions 4 adjacent to each other on the sheet materials 2 and 2a, the elastic member 3 contracts and extends across the plurality of elastic members 3 perpendicular to the longitudinal direction of the sheet materials 2 and 2a. A plurality of ridges 40 are formed.

Description

  The present invention is a composite elastic member formed by laminating two long sheet materials with the longitudinal direction aligned, and sandwiching an elastic member extending along the longitudinal direction of both sheet materials, The present invention relates to a method for producing the composite elastic member, a wearing article such as a diaper using the composite elastic member, and a method for producing the wearing article.

  There exists a thing disclosed by patent document 1 as a composite elastic member used around the waist of a diaper. This is formed by laminating two long sheet materials made of non-woven fabric or the like with the longitudinal direction aligned, and sandwiching an elastic member such as rubber thread extending along the longitudinal direction of both sheet materials between both sheet materials. The Both sheet materials are intermittently heat-sealed along the longitudinal direction of the sheet material and the direction orthogonal to the longitudinal direction. The elastic member does not pass through the heat fusion part of both sheet materials. That is, the heat fusion part is provided so as to avoid the elastic member.

Japanese Patent No. 3883530

  In the composite stretchable member described in Patent Document 1, both sheet materials are heat-sealed to each other. However, heat fusion has a pattern-shaped protrusion on the peripheral surface and is sandwiched and pressed between rolls heated to a high temperature. When a meandering expansion / contraction member comes into contact with the protrusion, an elastic member is formed by heat or pressure. May be disconnected. Therefore, complicated control is required so that the elastic member is not cut carelessly, and the equipment becomes expensive. Furthermore, in heat sealing, a predetermined time is required to heat the sheet material to the melting point, and it is not possible to realize a high speed for improving productivity.

  An object of the present invention is a composite elastic member formed by sandwiching an elastic member between both sheet materials and joining both sheet materials, and a composite elastic member having high manufacturing efficiency and less possibility of the elastic member being cut. It is to provide.

  The composite elastic member is composed of two long sheet materials that are aligned in the longitudinal direction, and a plurality of elastic members that extend along the longitudinal direction of both sheet materials are sandwiched between the two sheet materials substantially parallel to each other. It is formed. Both sheet materials are joined to each other at a plurality of joint portions made of a hot melt material continuously applied along a direction orthogonal to the longitudinal direction of the sheet material, and the joint portions are formed by joining the plurality of elastic members. As described above, a plurality of wrinkles extending across the plurality of elastic members perpendicular to the longitudinal direction of the sheet material are caused between the joint portions adjacent to each other on both sheet materials by the contracting action of the elastic members. Is formed.

  The joint between both sheet materials is formed from a hot melt material. Here, by forming the joining portion from a hot melt material, there is no need to sandwich and press the two sheet materials from both sides with a heat-sealing roll, and the elastic member is cut by heat or pressure. The possibility is reduced. In addition, time for heating the sheet material to the melting point is not required, and the production speed can be increased.

  Furthermore, although the hot melt material forming the joint is applied along the direction orthogonal to the longitudinal direction of the sheet material, there is little risk of cutting the elastic member even if the hot melt material touches the elastic member. For this reason, it is not necessary to apply the hot melt material intermittently while avoiding the elastic member. Therefore, since the hot melt material is continuously applied along the direction orthogonal to the longitudinal direction of the sheet material, the workability of applying the hot melt material is improved. Further, since the hot melt material is continuously applied, the bonding strength is higher than that of the composite stretchable member in which both sheet materials are intermittently bonded so that the bonded portion avoids the elastic member.

It is a perspective view of the composite elastic member which concerns on embodiment of this invention. It is the figure which looked at FIG. 1 from the A direction. It is a top view of FIG. It is a figure which shows the manufacturing process of a composite elastic member. It is a figure which shows the apparatus which apply | coats a hot-melt material. It is a perspective view of a diaper. (a), (b) is the top view which expand | deployed the diaper of FIG. 6 and was seen from the skin surface side. It is a top view which shows the manufacturing process of a 1st cross flow type diaper. It is a top view which shows the manufacturing process of a longitudinal flow type diaper. It is a top view of a tape type diaper. It is the top view which decomposed | disassembled the flap. It is a top view which shows the manufacturing process of a 2nd cross-flow type diaper. It is the top view which looked at the diaper which provided the non-shrink area | region from the non-skin surface side. It is a perspective view of the application roll for forming the non-shrink area | region shown in FIG. It is an exploded sectional view of a composite elastic member. It is sectional drawing of a composite elastic member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a composite elastic member according to an embodiment of the present invention, FIG. 2 is a view of FIG. 1 viewed from the direction A, and FIG. 3 is a plan view of FIG. The composite stretchable member 1 includes a plurality of elastic members extending in the longitudinal direction of the two sheet materials 2 and 2a by stacking two long sheet materials 2 and 2a in the longitudinal direction (X direction in FIG. 1). 3 is sandwiched between the sheet materials 2 and 2a substantially parallel to each other. Both the sheet materials 2 and 2a are comprised, for example from a nonwoven fabric, and the elastic member 3 is comprised from string-like bodies, such as a rubber thread, for example. Both sheet materials 2 and 2a are joined by a linear joining portion 4 extending along a direction (Y direction in FIG. 1) perpendicular to the longitudinal direction of the sheet materials 2 and 2a. The plurality of elastic members 3 pass through the joint portion 4, that is, are fixed on the sheet materials 2, 2 a at the joint portion 4.

  A plurality of joint portions 4 are provided along the longitudinal direction of the sheet materials 2 and 2a so as to be substantially parallel to each other and at equal intervals. In the state where the tensile force along the X direction is not applied to the composite elastic member 1, a convex ridge 40 is formed between the adjacent joint portions 4 on the elastic member 3. A plurality of ridges 40 are provided at equal intervals along the longitudinal direction of the sheet materials 2 and 2a, and expand and contract along the X direction. The collar 40 is formed by the elastic member 3 contracting and the sheet materials 2 and 2a deforming.

  The joining part 4 is comprised from the hot-melt material continuously apply | coated on the one sheet material 2 along a Y direction. The hot melt material is melted at a predetermined temperature and is used in this molten state to join the two sheet materials 2 and 2a. Since the hot melt material has a relatively low temperature on the coated sheet, the elastic member 3 is less likely to be cut even if it receives heat from the hot melt material. The plurality of elastic members 3 are fixed to both sheet materials 2 and 2a with hot melt materials at both ends in the longitudinal direction.

  In the composite elastic member 1 of the present embodiment, since a plurality of ridges 40 are formed, a volume appears in the thickness direction of the sheet material 2. Moreover, since the inside of the heel 40 is air, the touch when touching the heel 40 is soft. Accordingly, the composite stretchable member 1 is suitable around the waist of the diaper as described later.

  Since the joint portions 4 continuously extend along the Y direction and are formed at equal intervals along the X direction, the plurality of ridges 40 extend along the Y direction and are formed at equal intervals along the X direction. Is done. This makes it look beautiful. If the joint portion 4 is continuously formed in a spiral shape along the elastic member 3 (that is, in the X direction), the top portion of the flange 40 is recessed at a location where the joint portion 4 and the elastic member 3 intersect. That is, the ridge 40 does not continuously extend straight along the Y direction. This not only impairs the beauty of the appearance, but also reduces the amount of deformation when subjected to an external force because the ridge 40 is uneven. This impairs the softness of the touch. Therefore, the collar 40 is formed so as to continuously extend along the Y direction.

  As the nonwoven fabric used for both the sheet materials 2 and 2a, an air-through nonwoven fabric, a spunlace nonwoven fabric, a spunbonded nonwoven fabric, a melt blown nonwoven fabric, and the like are used from the viewpoint of aesthetic appearance and touch. Of course, other non-woven fabrics may be used. Furthermore, the forming material may be the same or different between one sheet material and the other sheet material of the two sheet materials 2 and 2a.

  Examples of the elastic member 3 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, stretchable polyolefin, and polyurethane. The elastic member 3 is not limited to thread rubber, but may be a string-like body such as flat rubber, and the cross section may be any of a rectangle, a square, a circle, and a polygon.

  Furthermore, a hot melt material is a kneaded material composed of a thermoplastic polymer resin, a tackifier, a viscosity modifier, an antioxidant, a heat stabilizer, an ultraviolet absorber, a filler, a plasticizer, etc. It is an adhesive that does not contain. Examples of the thermoplastic polymer resin constituting the hot-melt material include olefin-based, rubber-based, polyamide-based, and polyester-based elastic resins, and these are used alone or in a blend.

(Production method of composite elastic member)
Said composite elastic member 1 can be manufactured, for example with the following method. First, as shown in FIG. 4, the heated hot melt material is continuously applied in a straight line along a direction (Y direction) perpendicular to the longitudinal direction (X direction) of one sheet material 2. Thereby, the junction part 4 is formed. A plurality of joining portions 4 are formed so as to be substantially parallel to each other and substantially parallel to each other over the longitudinal direction of the sheet material 2. A hot melt material is also applied to both ends in the longitudinal direction of the sheet material 2.

  Next, a plurality of elastic members 3 are arranged on the one sheet material 2 coated with the hot melt material so as to be parallel to each other in the stretched state. That is, each elastic member 3 is disposed on the sheet material 2 in a state of being stretched against elasticity.

  Next, the other sheet material 2a is superimposed on the sheet material 2 coated with the hot melt material, and lightly pressed over the entire surface of the sheet material 2, 2a. Then, both the sheet materials 2, 2 a and the elastic member 3 are bonded by the joint portion 4. Since the hot melt material is also applied to both end portions of the sheet material 2 in the longitudinal direction, both end portions of the elastic member 3 are fixed to both end portions of both the sheet materials 2 and 2a. When the force that stretched the elastic member 3 is released after the joining of the two sheet materials 2 and 2a, the elastic member 3 contracts and both the sheet materials 2 and 2a are deformed to be adjacent on the sheet materials 2 and 2a. A plurality of ridges 40 are formed between the joint portions 4.

  In addition, before apply | coating a hot-melt material on one sheet material 2, the several elastic member 3 in the expansion | extension state is mounted, and then the hot-melt material is applied on the sheet material 2 from above the elastic member 3. May be applied.

  As described above, since the hot melt material applied on the sheet is relatively lower than the temperature at the time of heat fusion, even if the elastic member touches the joint, there is a possibility that it is cut by the heat at the time of joining. Less. In addition, by forming the joining portion from a hot melt material, it is not necessary to sandwich and press the two sheet materials from both sides with a heat fusion roll. Also in this respect, the possibility that the elastic member is cut by heat or pressure is reduced.

  Furthermore, although the hot melt material forming the joint is applied along the direction orthogonal to the longitudinal direction of the sheet material, there is little risk of cutting the elastic member even if the hot melt material touches the elastic member. For this reason, it is not necessary to apply the hot melt material intermittently while avoiding the elastic member. Therefore, since the hot melt material is continuously applied along the direction orthogonal to the longitudinal direction of the sheet material, the workability of applying the hot melt material is improved. Further, since the hot melt material is continuously applied, the bonding strength is higher than that of the composite stretchable member in which both sheet materials are intermittently bonded so that the bonded portion avoids the elastic member.

  If the pitch between the adjacent joint portions 4 is short, the appearance of the collar 40 is improved and the stretchability of the composite stretchable member 1 is also improved. However, it is difficult to apply the hot melt material manually so as to shorten the pitch between the joints 4. Therefore, a method of applying a hot melt material using an application device 7 shown in FIG. 5 can be considered.

  The coating device 7 includes a main roll 70 and a driven roll 71 whose peripheral surfaces are in contact with each other, a coating roll 72 whose peripheral surface is in contact with the peripheral surface of the driven roll 71, and a sheet between the coating roll 72 and the coating roll 72. An auxiliary roll 73 that conveys the material 2 is provided. On the peripheral surface of the application roll 72, ridges 74 extending along the rotation center axis of the application roll 72 are provided at equal intervals. The pitch between the adjacent protrusions 74 is set equal to the pitch between the joint portions 4. A storage portion 75 to which a hot melt material is supplied is formed at a contact portion between the main roll 70 and the driven roll 71.

  When the main roll 70 rotates, the driven roll 71 and the coating roll 72 rotate, and the hot melt material supplied to the storage unit 75 adheres to the protrusion 74 of the coating roll 72 via the driven roll 71. . When the coating roll 72 and the auxiliary roll 73 rotate to convey the sheet material 2, the hot melt material on the protrusions 74 of the coating roll 72 is applied to the sheet material 2. Since the protrusions 74 are formed at equal intervals, the linear joint portions 4 are formed on the sheet material 2 at equal intervals. As described above, when the elastic member 3 is placed on the sheet material 2 and the other sheet material 2a is stacked, the composite stretchable member 1 is completed.

(Diaper using composite elastic members)
The said composite elastic member 1 is used for wearing articles, such as a diaper for infants. FIG. 6 is a perspective view of the infant diaper 5, and FIGS. 7A and 7B are plan views of the developed diaper 5. The diaper 5 is a so-called pant-type, and is folded in half and joined to the side seal portion 51 so that the waist opening 52 where the inner side contacts the wearer's torso and the pair of legs into which the wearer's legs are inserted An opening 53 is formed. The waist opening 52 is formed by overlapping both ends in the longitudinal direction of the breathable outer packaging sheet 50, and is installed inside the outer packaging sheet 50 between the leg opening 53 and the side seal portion 51. A long absorbent body 6 for absorbing a person's urine is provided. The envelope sheet 50 is made of non-woven fabric, but any material can be used as long as it is breathable and heat-sealable.

  In the unfolded state of the diaper 5, arc-shaped notches 54 are formed on both side edges of the outer sheet 50, and the both ends of the outer sheet 50 in the longitudinal direction overlap with each other. Configure. The absorbent body 6 is oriented in the longitudinal direction of the outer sheet 50, and the outer sheet 50 is joined to the non-skin contact surface of the absorbent body 6. In other words, the absorbent body 6 is oriented in the longitudinal direction of the wearer in the developed state of the diaper 5. In addition, an inner sheet (not shown) may be covered on the absorbent body 6 and the absorbent body 6 may be wrapped with the outer sheet 50 and the internal sheet.

  The absorbent body 6 has a known configuration in which an absorbent core composed of absorbent polymer particles and a fiber material is wrapped with a thin wrapping paper. The absorbent body 6 includes a liquid-permeable top sheet on the skin contact surface side and a liquid-impermeable back sheet on the non-skin contact surface side, and prevents the urine and the like from leaking out of the absorbent body 6. Although a leak-proof wall called is provided, this is a known configuration and will not be described and illustrated.

  As shown in FIG. 7 (a), the diaper 5 includes a type in which a waist gather and / or waist gathers are formed on the outer sheet 50 by the composite stretchable member 1, and the composite stretchable as shown in FIG. 7 (b). There is a type in which the waistline gather is configured as the side panels 55 provided on the both ends of the outer sheet 50 in the short side direction of the member 1. For convenience of explanation, in the following description, the diaper 5 of the type shown in FIG. 7A is referred to as a transverse flow type, and the diaper 5 of the type shown in FIG. In both types of diapers 5, the composite stretchable member 1 may be provided at the peripheral edge of the notch 54, and a known leg gather (G 3 in FIG. 6) may be provided at the leg opening 53.

  The lateral flow type diaper 5 is provided with the composite stretchable member 1 over the entire width, and therefore has good stretchability in the lateral direction. Therefore, if the waist opening part 52 is pulled sideways, the waist opening part 52 can be enlarged and there exists a merit that it is easy to give to a wearer.

  However, since the diaper 5 is for infants, a pattern such as a cartoon character between the leg opening portions 53 or the side seal portions 51 on the outer sheet 50, particularly on the non-skin surface side of the absorber. May be drawn. In the lateral flow type diaper 5, since the composite elastic member 1 expands and contracts in the lateral direction, this pattern is contracted near the composite elastic member 1 and is difficult to understand.

  On the other hand, the longitudinal flow type diaper 5 is provided on the non-skin surface of the absorbent body 6 because the composite elastic member 1 is provided as a side panel 55 that is located on both sides of the absorbent body 6 and contacts the waist of the wearer. There is an advantage that the drawn pattern does not shrink so much and is easy to understand. That is, the transverse flow type diaper 5 and the longitudinal flow type diaper 5 each have advantages and disadvantages. Below, the manufacturing method of both types of diapers is shown.

(The first cross-flow type diaper manufacturing method)
FIG. 8: is a top view which shows the manufacturing process of a 1st crossflow type diaper. First, the 1st strip | belt-shaped body 8 which connected the absorber 6 in the horizontal direction, and the 2nd strip | belt-shaped body 80 which is a strip | belt made from a nonwoven fabric extended in the horizontal direction are prepared. The second strip 80 is a continuous body of the composite stretchable member 1 manufactured at least at both ends by the above-described manufacturing method, and becomes the outer sheet 50. Both strips 8 and 80 are transported along a transport direction X along the longitudinal direction of the second strip 80. The width of the second strip 80 is greater than the length L of the absorber 6. The manufacturing process includes stages 1 to 6.

  The 1st strip | belt-shaped body 8 is cut | disconnected one after another in the stage 1, and is divided | segmented into the absorber 6 of length L, respectively. Each absorber 6 is conveyed to the stage 2. In the stage 2, the absorber 6 is placed on a drum (not shown) and rotated 90 ° or 270 ° during the rotary conveyance of the drum.

  In the stage 3, a plurality of absorbers 6 are placed on the second strip 80 by being spaced apart from each other by a certain distance in the transport direction, and this is placed on the second strip 80 by hot melt material or heat fusion. Join. Thereafter, an inner sheet may be placed on the second strip 80 so as to cover the absorber 6.

  On the stage 4, between the adjacent absorbers 6, a vertically long elliptical through-hole 20 serving as a leg opening 53 is opened. Thereafter, the second strip 80 is folded in two so that the center line C in the width direction is a crease and the absorbent body 6 is on the inside. On the stage 5, the second band 80 that is folded in half is joined to the side seal part 51 by thermal fusion or the like at an intermediate part between the adjacent absorbent bodies 6. Then, it cut | disconnects along the direction K orthogonal to the longitudinal direction of the 2nd strip | belt-shaped body 80 in the stage 6, and the diaper 5 in the state to which the side seal part 51 was fixed is obtained.

(Vertical flow type diaper manufacturing method)
FIG. 9 is a plan view showing a manufacturing process of the longitudinal flow type diaper 5. First, a first strip 8 having the absorbent body 6 connected in the transport direction and a second strip 80, which is a non-woven fabric strip extending in the transport direction, are prepared. The second strip 80 is the outer sheet 50. Both strips 8, 80 are transported along the transport direction X. The manufacturing process includes stages 1 to 4.

  The 1st strip | belt-shaped body 8 is cut | disconnected one after another in the stage 1, and is divided | segmented into the absorber 6 of length L, respectively. Each absorber 6 is conveyed to the stage 2.

  In the stage 2, the composite elastic members 1 having a predetermined length are joined to both sides of the second strip 80 along the longitudinal direction of the second strip 80 at equal intervals. A distance L <b> 1 between the central portions of the adjacent composite stretchable members 1 is longer than the length L of the absorber 6. Thereafter, the absorbent body 6 is placed between the adjacent composite elastic members 1 on the second strip 80 and joined to the second strip 80. Thereafter, an inner sheet may be placed on the second strip 80 so as to cover the absorber 6.

  Next, along the width direction of the composite elastic member 1, the second strip 80 and the composite elastic member 1 are cut so as to pass through the center K <b> 1 in the longitudinal direction of the composite elastic member 1, as shown in the stage 3. To obtain an open diaper 5.

  At the stage 4, the second belt-like body 80 that has been cut is folded in two along the center line in the longitudinal direction of the envelope sheet 50 that has been individually cut and formed, and the side portions of the overlapped composite elastic members 1 are joined together. By joining, a longitudinal flow type diaper 5 is completed.

  In the above description, the manufacturing process of the pant-type diaper 5 is described, but the diaper 5 can also be manufactured as a tape type. As shown in FIG. 10, the tape-type diaper 5 is used in a state where the side seal portion 51 of the outer sheet 50 is not heat-sealed during the manufacturing process and is unfolded. The tape-type diaper 5 is attached to the wearer by putting the absorbent body 6 on the wearer's crotch and putting the leg of the wearer out of the notch 54, and then folding the outer sheet 50 in half. . Flap 9 provided with mechanical fasteners (not shown) that are stretchable in the width direction and engageable with the non-skin surface of the other body on both sides in the width direction of at least one of the front body and the back body Is attached, and the flap 9 can be fastened to both sides on the non-skin surface of the other body in a state where the outer sheet 50 is folded in half. This is effective in that it can be fitted more to the waist of the wearer than the pants-type diaper 5.

  At this time, as shown in FIG. 11, the flap 9 is a composite elastic member formed by sandwiching a plurality of string-like elastic members 91 made of polyurethane or the like between two flap sheets 90 having elasticity in the width direction. 1 can be used. Moreover, you may provide the composite elastic member 1 along the width direction of a waist opening part periphery.

(2nd cross flow type diaper manufacturing method)
FIG. 12 is a diagram illustrating a manufacturing process of the second transverse flow type diaper, and the manufacturing process includes stages 1 to 3. First, as shown on the stage, a pair of third strips 81 which are continuous bodies in which the composite elastic members 1 manufactured by the manufacturing method described above are connected in the transport direction are prepared. The width of the third strip 81 is shorter than the length L of the absorber. Both the third strips 81 are placed parallel to each other, and the absorbent body 6 is placed across the third strips 81 so that the longitudinal direction is perpendicular to the longitudinal direction of the third strips 81. After the plurality of absorbent bodies 6 are placed apart from each other in the transport direction, the outer edges along the longitudinal direction of both third strips 81 are folded and overlapped on both ends of the absorbent body 6 in the longitudinal direction.

  Next, as shown in the stage 2, a through-hole 21 serving as a leg opening 53 may be opened between adjacent absorbers 6. Since both the third strips 81 are separated from each other, when the through hole 21 is opened, the amount of cutting the third strip 81 is very small. Thereby, the material loss of a strip | belt shaped object can be reduced compared with the manufacturing process shown in FIG. Thereafter, the third band 81 is folded in half with the center line C in the width direction as a fold, so that the absorbent body 6 is on the inside. Then, as shown in the stage 3, the 3rd strip | belt-shaped body 81 is welded and cut | disconnected along the direction K orthogonal to a longitudinal direction, and the diaper 5 to which the side seal part 51 (refer FIG. 6) was fixed is obtained.

(Modified diaper for horizontal flow type)
As shown in FIG. 13, a non-shrinkable region RY in which the contracting force of the elastic member 3 does not occur may be provided in a portion where the absorber 6 overlaps on the composite contracting member 1. Thereby, the pattern provided on the non-skin surface of the absorbent body 6 does not shrink and becomes easy to see.

  The non-shrinkable region RY can be formed as an empty region where the elastic member 3 is not provided. Specifically, the elastic member 3 is formed by pressurizing or heating a portion where the absorbent body of the composite stretchable member 1 overlaps after the outer packaging material 50 made of the composite stretchable member 1 is formed and before the absorbent body 6 is disposed. The non-stretchable region RY can be formed by removing the contraction force at the intermediate portion in the longitudinal direction. At this time, as a means for pressurizing or heating, a roll (not shown) having protrusions and blades provided in a predetermined pattern at intervals along the axial direction and / or circumferential direction is provided. It may be used. It is desirable to substantially remove the contraction force by pressing or heating the composite stretchable member 1 between the roll and the roll facing the roll to finely cut the elastic member 3.

  Moreover, although the elastic member 3 is provided, the non-joining area | region which does not join the elastic member 3 in the site | part in which the absorber 6 is arrange | positioned to the sheet materials 2 and 2a is formed, and the non-joining area | region of the composite elastic member 1 is heated or The non-shrinkable region RY can also be formed by applying pressure to cut the elastic member 3 and snapping back toward both sides in the width direction.

  As described above, the coating device 7 shown in FIG. 5 is used to apply the hot melt material to the elastic member 3. At this time, as shown in FIG. 14, if the ridge empty area KY that does not form the ridge 74 is formed on the application roll 72, the hot melt material is not applied to the ridge empty area KY. A non-bonded region can be formed on the member 1.

  When the elastic member 3 is cut by heating or pressurizing the composite elastic member 1, it is desirable to heat or press from the skin surface side rather than the non-skin surface side of the composite elastic member 1. By heating or pressurizing from the skin surface side to cut the elastic member 3 and removing the contraction force of the elastic member 3, the part where the absorbent body 6 is arranged becomes smooth, and the absorbent body 6 is securely joined. Can do.

  In the said embodiment, the infant diaper was illustrated as a wearing article using the composite elastic member 1, However, It is not limited to this, For example, an adult diaper may be sufficient. Further, the wearing article may be sanitary shorts or the like.

  FIG. 15 is an exploded cross-sectional view of the composite elastic member 1. The elastic member 3 is in a stretched state. As shown in FIG. 15, the hot melt material is applied at an equal pitch, the width T of the joint portion 4 is 0.5 to 1.5 mm, and the interval W between the adjacent joint portions 4 is 3 to 10 mm, preferably 4 to The composite elastic member 1 which is 8 mm and the sheet materials 2 and 2a are non-woven fabrics can be suitably used for wearing articles such as diapers.

  The cross-sectional view of FIG. 16 schematically shows a cross section of the composite elastic member 1 having the above dimensions. When comparing the appearance of one sheet material 2 coated with a hot melt material and the other sheet material 2a, the former is clearly distinguished between the heel 2s and the portion 2p between the heel 2s. In contrast, the heel 2s is formed in the same shape and orderly, whereas in the latter, the boundary between the heel 2t and the portion 2q between the heel 2t is ambiguous, and the shape of the heel 2t varies. This is because the hot melt material is relatively hot immediately after the hot melt material is applied, so that the hot melt material enters the inside of the nonwoven fabric sheet material 2, but the temperature decreases when the other nonwoven fabric sheet material 2 a is bonded. Therefore, it is considered that the hot melt material is only adhered to the surface of the other nonwoven fabric sheet material 2a.

  When such a composite stretchable member 1 is used for a wearing article, a wearing article having an excellent appearance can be obtained by using the non-skin surface side of the wearing article on the non-skin surface side of the non-skin surface of the wearing article, On the contrary, by using the hot melt material 2 on the skin side of the wearing article, a wearing article having good air permeability can be obtained.

  The composite elastic member according to the present invention is useful when used for a wearing article such as a diaper.

DESCRIPTION OF SYMBOLS 1 Composite elastic member 2, 2a Sheet material 2s, 2t 部分 2p, 2q 部分 part 3 Elastic member 4 Joint part 5 Diaper 6 Absorber 40 襞

The non-shrinkable region RY can be formed as an empty region where the elastic member 3 is not provided. Specifically, after forming the outer packaging material composed of the composite stretchable member 1, before placing the absorbent body 6, the portion of the composite stretchable member 1 where the absorbent body overlaps is pressed or heated to thereby form the elastic member 3 The non-stretchable region RY can be formed by removing the contraction force at the intermediate portion in the longitudinal direction. At this time, as a means for pressurizing or heating, a roll (not shown) having protrusions and blades provided in a predetermined pattern at intervals along the axial direction and / or circumferential direction is provided. It may be used. It is desirable to substantially remove the contraction force by pressing or heating the composite stretchable member 1 between the roll and the roll facing the roll to finely cut the elastic member 3.

The composite elastic member is composed of two long sheet materials that are aligned in the longitudinal direction, and a plurality of elastic members that extend along the longitudinal direction of both sheet materials are sandwiched between the two sheet materials substantially parallel to each other. It is formed. Both sheet materials are joined to each other at a plurality of joint portions made of a hot melt material continuously applied along a direction orthogonal to the longitudinal direction of the sheet material, and the joint portions are formed by joining the plurality of elastic members. As described above, a plurality of wrinkles extending across the plurality of elastic members perpendicular to the longitudinal direction of the sheet material are caused between the joint portions adjacent to each other on both sheet materials by the contracting action of the elastic members. Is formed.
(1) The present invention provides a wearing article configured as follows.
It is the wearing article which has a waist opening part which a peripheral part inner side touches a wearer's trunk circumference. A composite elastic member is provided in the peripheral part of the said waist opening part and / or waist part, and a waist gather and / or waist part gather are comprised. The composite elastic member is composed of (a) two long sheet materials that are aligned in the longitudinal direction and (b) a hot melt material, and is continuous along the direction perpendicular to the longitudinal direction of both sheet materials. A joint for joining the two sheet materials to each other; and (c) a plurality of sheets disposed between the two sheet materials and extending substantially parallel to each other along the longitudinal direction of the two sheet materials through the joint. And an elastic member. Between the joint portions adjacent to each other on the two sheet materials, in a state where no tensile force is applied to the elastic members, a plurality of members extending perpendicularly to the longitudinal direction of the two sheet materials and extending over the plurality of elastic members. A book cage is formed. The outer appearance of one of the two sheet materials of the composite stretchable member is more clearly distinguished from the ridge and the portion between the ridges than the appearance of the other sheet material. The material is used on the non-skin side.
(2) Moreover, this invention is comprised as follows and provides a wearing article.
It is a wearing article which has a side panel which an inner side touches a wearer's waist. A composite elastic member is used as the side panel to form a waistline gather. The composite elastic member is
(A) two long sheet materials that are aligned in the longitudinal direction, and (b) a hot melt material, and both the sheet materials continuously along a direction perpendicular to the longitudinal direction of both sheet materials. And (c) a plurality of elastic members that are arranged between the two sheet materials and extend substantially parallel to each other along the longitudinal direction of the two sheet materials. . Between the joint portions adjacent to each other on the two sheet materials, in a state where no tensile force is applied to the elastic members, a plurality of members extending perpendicularly to the longitudinal direction of the two sheet materials and extending over the plurality of elastic members. A book cage is formed. The outer appearance of one of the two sheet materials of the composite stretchable member is more clearly distinguished from the ridge and the portion between the ridges than the appearance of the other sheet material. The material is used on the non-skin side.
(3) Moreover, this invention provides the manufacturing method of the wearing article comprised as follows.
The outer packaging sheet is provided with a leg opening into which the wearer's leg is inserted, and a waist opening in which the inner periphery is in contact with the wearer's torso. It is a method for manufacturing a worn article, in which a long absorbent body is provided, and a composite elastic member is used at the periphery of the waist opening and / or the waistline. The composite elastic member is composed of (a) two long sheet materials that are aligned in the longitudinal direction and (b) a hot melt material, and is continuous along the direction perpendicular to the longitudinal direction of both sheet materials. A joint for joining the two sheet materials to each other; and (c) a plurality of sheets disposed between the two sheet materials and extending substantially parallel to each other along the longitudinal direction of the two sheet materials through the joint. And an elastic member. Between the joint portions adjacent to each other on the two sheet materials, in a state where no tensile force is applied to the elastic members, a plurality of members extending perpendicularly to the longitudinal direction of the two sheet materials and extending over the plurality of elastic members. A book cage is formed. The method for manufacturing a worn article includes: (i) a step of preparing a plurality of the absorbent bodies and preparing a belt-like body serving as an outer sheet; and (ii) a longitudinal direction of each absorbent body orthogonal to the longitudinal direction of the belt-like body. The process of
(Iii) The appearance of one of the two sheet materials of the composite elastic member is more distinct from the ridge and the portion between the ridges than the appearance of the other sheet material, At least both side portions of the belt-like body are formed by the composite stretchable member so that the one sheet material is used on the non-skin surface side, and the plurality of absorber bodies are separated from each other inside the belt-like body. And (iv) a step of opening a through-hole serving as the leg opening between adjacent absorbers on the strip, and (v) a center line in the width direction of the strip A step of folding the band-like body in half so that the absorber is on the inside, and (vi) the band-like body in the middle of adjacent absorbers Bonding in a plane perpendicular to the longitudinal direction of the film, and (vii) the bonded band Cutting the side portions of the shaped body.
(4) Moreover, this invention provides the manufacturing method of the wearing article comprised as follows.
The outer packaging sheet is provided with a side panel that is in contact with the waist of the wearer, a long absorbent body is provided on the inner side of the outer packaging sheet, and a composite elastic member is provided on the side panel. It is the manufacturing method of the used wearing article. The composite elastic member is composed of (a) two long sheet materials that are aligned in the longitudinal direction and (b) a hot melt material, and is continuous along the direction perpendicular to the longitudinal direction of both sheet materials. A joint for joining the two sheet materials to each other; and (c) a plurality of sheets disposed between the two sheet materials and extending substantially parallel to each other along the longitudinal direction of the two sheet materials through the joint. And an elastic member. Between the joint portions adjacent to each other on the two sheet materials, in a state where no tensile force is applied to the elastic members, a plurality of members extending perpendicularly to the longitudinal direction of the two sheet materials and extending over the plurality of elastic members. A book cage is formed. The method for manufacturing a worn article includes: (i) a step of preparing a plurality of the absorbent bodies and preparing a belt-like body that serves as an outer sheet; and (ii) a step of directing the longitudinal direction of each absorbent body in the longitudinal direction of the belt-like body. And (iii) the outer appearance of one of the two sheet materials of the composite elastic member is more distinct from the ridge and the portion between the ridges than the appearance of the other sheet material. The distance between the plurality of composite elastic members and the central part of the adjacent composite elastic members is set to the length of the absorber so that the one sheet material is used on the non-skin surface side of the belt-like body. A step of joining the plurality of absorber main bodies in a state of being separated from each other inside the composite elastic member on the strip, and (iv) a width direction of the composite elastic member Along the band-shaped body and the composite elastic member, the longitudinal direction of the composite elastic member A step of cutting so as to pass through the center portion in the direction; and (v) folding the cut strip-like body in half with the longitudinal center line of the outer sheet as the fold, and connecting the side portions of the overlapped composite elastic members Joining.

Claims (8)

Composite stretch formed by stacking two long sheet materials with their longitudinal directions aligned and sandwiching a plurality of elastic members extending along the longitudinal direction of both sheet materials approximately parallel to each other A member,
Both sheet materials are joined to each other at a plurality of joint portions made of a hot melt material continuously applied along a direction orthogonal to the longitudinal direction of the sheet material, and the joint portions are formed by joining the plurality of elastic members. Street,
A plurality of ridges extending across the plurality of elastic members perpendicular to the longitudinal direction of the sheet material are formed between the joint portions adjacent to each other on both sheet materials by the contracting action of the elastic members. A composite elastic member. The composite elastic member according to claim 1, wherein the plurality of joint portions are provided so as to be substantially parallel to each other. The composite elastic member according to claim 1 or 2, wherein both ends of the plurality of elastic members are fixed to the two sheet members. Two long sheet materials and a plurality of elastic members extending along the longitudinal direction of both sheet materials are prepared, and on one sheet material, along a direction orthogonal to the longitudinal direction of the sheet material. A step of continuously applying a hot melt material to form a joint;
Placing the plurality of stretched elastic members in the longitudinal direction of the one sheet material, and placing the elastic member on the one sheet material so that the elastic member passes through the joint;
A method for producing a composite stretchable member, comprising a step of superposing the other sheet material on the one sheet material so as to align the longitudinal direction and joining the two sheet materials. A wearing article having a waist opening with which the inner periphery is in contact with the waist of the wearer,
A wearing article comprising a waist gather and / or a waistline gather by providing the composite elastic member according to any one of claims 1 to 3 at a peripheral edge of the waist opening and / or waistline. A wearing article having a side panel that contacts the waist of the wearer on the inside,
A worn article comprising a waistline gather using the composite elastic member according to any one of claims 1 to 3 as the side panel. The outer packaging sheet is provided with a leg opening into which the wearer's leg is inserted, and a waist opening in which the inner periphery is in contact with the wearer's torso. A manufacturing method of a wearing article provided with a long absorbent body, wherein the composite elastic member according to any one of claims 1 to 3 is used at a peripheral portion of the waist opening and / or the waistline portion,
Preparing a plurality of the absorbers and preparing a band-like body to be an outer sheet; and
Directing the longitudinal direction of each absorbent body to be orthogonal to the longitudinal direction of the belt-shaped body;
At least both sides of the belt-like body are formed by the composite stretchable member, and the inside of the belt-like body is joined with the plurality of absorber bodies separated from each other;
On the band-shaped body, a step of opening a through-hole serving as the leg opening between adjacent absorbers;
Folding the band-like body in half so that the absorber is on the inside, with the center line in the width direction of the band-like body being a crease;
Bonding the two-folded belt-like body in a plane perpendicular to the longitudinal direction of the belt-like body at an intermediate portion between adjacent absorbent bodies;
And a step of cutting the side portions of the joined belt-like bodies. An outer sheet is provided, and the outer sheet is provided with a side panel that is in contact with the waist of the wearer, and a long absorbent body is provided on the inner side of the outer sheet, and the side panel includes: It is a manufacturing method of the wearing article in which the composite elastic member in any one of 3 was used,
Preparing a plurality of the absorbers and preparing a band-like body to be an outer sheet; and
Directing the longitudinal direction of each absorber in the longitudinal direction of the strip,
A plurality of the composite stretchable members are joined to the side portions of the belt-like body with a gap equal to or longer than the longitudinal length of the absorber, and the inside of the composite stretchable member on the strip-like body, Bonding a plurality of absorber bodies apart from each other;
Cutting the strip and the composite stretchable member along the width direction of the composite stretchable member so as to pass through the central portion in the longitudinal direction of the composite stretchable member;
A method of manufacturing a worn article, comprising: folding the cut strip-like body in half with a center line in the longitudinal direction of the outer sheet as a crease, and joining the side portions of the overlapped composite elastic members.

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