JP2008194493A - Disposable underpants and method for manufacture thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable high-speed production of disposable underpants having a fit gather laminate without complicating the structure of a manufacturing apparatus. <P>SOLUTION: Underpants includes an elastic member 1 arranged the width direction of a pair of nonwoven fabric sheets 6 and 7 and fixed to these sheets excepting the center part in the width direction of the nonwoven fabric sheets 6 and 7. The underpants is also provided with an integrated fit gather laminate 2 formed by cutting the elastic member 1 at the center part in the width direction of the nonwoven fabric sheets 6 and 7, a reinforcing sheet 3 fixed on the bottom face of the center part in the width direction of the fit gather laminate, an absorbing material 4 arranged on the upper face of the fit gather laminate 1, and a backing sheet 5 arranged on the bottom face of the reinforcing sheet 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disposable pant having a fit gather laminate in which an elastic member is disposed between a pair of upper and lower nonwoven fabric sheets and a method for manufacturing the same.

Conventionally, for example, as shown in Patent Document 1, a back sheet having a waist gather is folded downward at a predetermined interval and transferred in the longitudinal direction, and a waist side elastic body is supplied in the longitudinal direction on the upper surface of the back sheet being transferred. A process of supplying a non-woven fabric for pressing in the longitudinal direction on the upper surface and bonding the waist side elastic body and the non-woven fabric for pressing to the back sheet except for a downward folding portion, and a waist side elastic body integrated with the back sheet And cutting the nonwoven fabric for pressing at the upper end of the downward folding portion of the back sheet, then expanding the downward folding portion to return the back sheet to a sheet shape, forming a back sheet having a waist side elastic body at predetermined intervals And the process of bonding the bodily fluid absorber to the portion where the waist side elastic body does not exist on the back sheet after the process, After cutting the crotch opening in the back sheet after cutting, the process of cutting at the center line of the crotch opening and separating into individual intermediate products, and placing the waist side elastic body and body fluid absorption body inside In addition, there is known a method for manufacturing a brief-type body fluid absorbing device including a process of folding the intermediate product in half and bonding the waist side part.
JP-A-6-197920

  According to the method for manufacturing a bodily fluid absorbing device described in the above publication, the waist side elastic body is provided by mounting the waist side elastic body in the left-right direction except for the width direction center portion and the longitudinal direction center portion of the body fluid absorption body. It is easy to extend the waist side elastic body while reducing the material cost by reducing the installation area and supplying the waist side elastic body in the transfer direction of the back sheet to speed up the production line. There is an advantage that a bodily fluid absorbing device that can be worn and can improve the adhesion to the body without giving a feeling of pressure to the wearer is obtained.

  However, as described above, the back sheet having the waist gathers is folded downward at a predetermined interval and transferred in the longitudinal direction while supplying the waist side elastic body and the pressing nonwoven fabric to the upper surface of the back sheet, and downward The operation of bonding the waist side elastic body and the non-woven fabric for pressing to the back sheet excluding the folding portion, and cutting the waist side elastic body and the pressing non-woven fabric integrated with the back sheet at the upper end of the folding portion below the back sheet Since these operations are difficult, it is necessary to slow down the operation speed, and it is necessary to provide a folding mechanism for folding the back sheet downward. There is a problem that the structure of the manufacturing apparatus becomes complicated.

  DISCLOSURE OF INVENTION The present invention has been made in view of the above points, and includes a disposable pant having a fit gather laminate in which an elastic member is disposed between a pair of upper and lower nonwoven sheets without complicating the structure of the manufacturing apparatus. The purpose is to enable high-speed manufacturing.

  In the invention according to claim 1, an elastic member is disposed in the width direction between a pair of upper and lower nonwoven fabric sheets, and is fixed to a portion excluding the central portion in the width direction of the nonwoven fabric sheet. It is provided with a fit gathers laminate in which the elastic member is cut at the center and an absorbent body disposed on the upper surface side of the fit gathers at the center in the width direction.

  According to the above configuration, the elastic member is disposed in a portion excluding the central portion in the width direction of the nonwoven fabric sheet constituting the fit gather laminate, and the elastic member expands and contracts, thereby obtaining a stable wearing state and absorbing. The stretchable force of the elastic member is prevented from acting on the center portion in the width direction of the fit gathers laminated body on which the body is disposed, and the installation portion of the absorber is formed in a flat shape.

  The invention according to claim 2 is an elastic member in which a continuous body of a pair of nonwoven fabric sheets constituting a fit gather laminate and a continuous body of elastic members disposed therebetween are conveyed in the longitudinal direction. After intermittently fixing the continuum to the nonwoven fabric sheet, the elastic member is cut together with the nonwoven fabric sheet at the non-fixed portion, and on the upper surface side of the fit gather laminate at a position corresponding to the non-fixed portion of the elastic member. The absorber is arranged in the position where it is located.

  According to the above configuration, the elastic member is disposed in a portion excluding the central portion in the width direction so that the portion can be expanded and contracted, and the elastic member is expanded and contracted in the central portion in the width direction in which the absorber is disposed. Disposable pants having a fit-gathered laminate configured so that no force acts are manufactured at a high speed by a manufacturing apparatus having a simple structure.

  As described above, according to the present invention, the manufacturing apparatus having a simple structure is stable by the expansion and contraction of the elastic member disposed in the portion excluding the central portion in the width direction of the nonwoven fabric sheet constituting the fit gather laminate. The installed portion of the absorber is deformed by preventing the elastic member from acting on the central portion in the width direction of the fitted gathers laminate in which the absorber is disposed. Disposable pants that can prevent the problem can be manufactured continuously at high speed.

  FIG.1 and FIG.2 has shown the raw material for disposable pants formed by expand | deploying the disposable pants which concern on embodiment of this invention. The disposable pants material includes a fit gather laminated body 2 in which a plurality of elastic members 1 are arranged to extend in the width direction at a portion other than the width central part, and a width central part of the fit gather laminated body 2 A pair of front and rear reinforcing sheets 3 fixed to the lower surface side of the disposable pants, that is, the upper surface side of the fit gather laminate 2, that is, the inner surface side of the disposable pants located on the human body contact surface side And the back sheet 5 disposed on the lower surface side of the reinforcing sheet 3.

  The elastic member 1 is made of a linear or belt-like rubber material, or a trade name “Operon” manufactured by Toray DuPont, and is disposed between a pair of upper and lower nonwoven fabric sheets 6 and 7 in an expanded state. The elastic member 1 does not act on the central portion in the width direction by being fixed to the portions other than the central portions in the width direction 6 and 7 and being cut in the central portions in the width direction of the nonwoven fabric sheets 6 and 7. It is configured as follows.

  The nonwoven fabric sheets 6 and 7 are formed in an hourglass shape with a flexible material such as polypropylene, polyethylene, polyester or rayon, and the elastic member 1 is disposed in a portion excluding the central portion in the width direction. The upper non-woven fabric sheet 6 and the lower non-woven fabric sheet 7 are integrally bonded to each other at the arrangement portion of the elastic member 1 by an adhesive such as a melt, thereby constituting the fit gather laminate 2.

  The reinforcing sheet 3 is made of a plastic film material or the like having appropriate rigidity, and is fixed to the lower surface side of the center portion in the width direction of the fit gather laminate 2. In addition, on the lower surface side of the reinforcing sheet 3, that is, on the outer surface side of the disposable pants, a character design or a character is displayed as necessary (see FIG. 3).

  As shown in FIG. 2, the absorbent body 4 includes an upper liquid-permeable sheet 8 made of a nonwoven fabric or a perforated plastic film material, a lower liquid-impervious sheet 9 made of a plastic film material, and the like. The absorbent mat 10 is made of pulverized pulp, a highly water-absorbent resin, a shape-retaining thermoplastic resin, or the like disposed between the sheets 8 and 9. Note that a pair of left and right rising gathers 11 to which elastic members made of a linear rubber material or the like are attached along the longitudinal direction of the disposable pants are provided on the upper surfaces of the left and right side portions of the liquid-permeable sheet 8. desirable.

  The back sheet 5 is made of a flexible material such as polypropylene, polyethylene, polyester, or rayon, and is disposed on the lower surface side of the reinforcing sheet 3 so as to cover the entire lower surface of the fit gather laminate 2. It is configured to be adhered to the lower surface of the body 2 with an adhesive such as hot melt.

  And the material for disposable pants which has the said fit gathers laminated body 2 and the back sheet | seat 5 is folded in half in the intermediate part of the longitudinal direction, and the both right-and-left both sides of the said fit gather laminated body 2 are an ultrasonic sealing machine or a heat seal. As shown in FIG. 3, it is configured to be formed into a pants shape by being integrally joined by means such as welding using a machine or adhesion using an adhesive.

  FIG. 4 shows an apparatus for manufacturing the disposable pants. The manufacturing apparatus includes a fit gather molding unit 12 that molds a continuous body of the fit gather laminate 2, a reinforcing sheet bonding unit 13 that bonds the reinforcing sheet 3 to the continuous body of the fit gather laminate 2, and the above It has a back sheet adhesive part 14 for adhering the back sheet 5 to the continuous body of the fit gather laminate 2 and an absorbent body supply part 15 for supplying the absorber 4 onto the continuous body of the fit gather laminate 2. .

  The fit gather forming section 12 includes a pair of nonwoven fabric rolls 16 and 17 that respectively feed out the pair of nonwoven fabric sheets 6 and 7, an elastic member roll 18 that feeds out the elastic member 1, and hot melt on the nonwoven fabric sheet 6 intermittently. A first hot-melt coating machine 19 to be applied, a pressure roller 20 that presses the two nonwoven fabric sheets 6 and 7 together, and a cutting roller 21 that cuts the elastic member 1 together with the nonwoven fabric sheets 6 and 7 in the hot-melt non-application portion. And have.

  The cutting roller 21 reliably cuts the plurality of elastic members 1 disposed between the nonwoven fabric sheets 6 and 7, and also has a plurality of cuts disposed at predetermined intervals so as not to cut unnecessary portions as much as possible. It has a blade and is configured to intermittently cut the nonwoven fabric sheets 6 and 7 on which the elastic member 1 is installed.

  The reinforcing sheet bonding portion 13 applies hot melt to the reinforcing sheet roll 22 that feeds out the continuous body of the reinforcing sheet 3 and the continuous body of reinforcing sheet 3 that is fed out from the reinforcing sheet roll 22. The second hot melt coating machine 23, the cutting roller 24 for cutting the continuous body of the reinforcing sheet 3 into a predetermined length, and the reinforcing sheet 3 formed by cutting the continuous body are fitted to the gathered laminate. 2 and a pressure contact roller 25 that presses and adheres to the lower surface side of the surface.

  The back sheet bonding portion 14 includes a back sheet roll 26 that feeds out a continuous body of the back sheet 5, and a third hot melt coating machine 27 that applies hot melt to the continuous body of the back sheet 5 that is fed out from the back sheet roll 26. And a pressing roller 28 that presses and adheres the continuous body of the back sheet 5 to the lower surface side of the fit gather laminated body 2.

  The absorbent body supply unit 15 is placed in a state where the absorbent body 4 manufactured in a separate process is positioned at a predetermined position on the fit gather laminated body 2, and is welded using an ultrasonic sealing machine or a heat sealing machine. The absorber 4 is configured to be fixed to the upper surface side of the fit gathers laminated body 2 by means such as adhesion using an adhesive.

  In order to manufacture disposable pants using the manufacturing apparatus, an elastic member fed out from the elastic member roll 18 between a continuous body of a pair of nonwoven fabric sheets 6 and 7 fed out from the nonwoven fabric rolls 16 and 17. In a state where 1 is disposed, these continuous bodies are conveyed in the longitudinal direction. Then, after the hot melt is intermittently applied to the nonwoven fabric sheet 6 at a predetermined interval by the first hot melt applicator 19, the nonwoven fabric sheets 6 and 7 are sandwiched and pressed by the pressure roller 20, and FIG. As shown in FIG. 2, the nonwoven fabric sheets 6 and 7 and the elastic member 1 are bonded together at the application portion of the hot melt H1.

  Next, by cutting the continuous member of the elastic member 1 with the cutting roller 21 along the breaking line C1 together with the continuous member of the nonwoven fabric sheets 6 and 7 at the non-bonded portion as shown in FIGS. The elastic member 1 having a predetermined length is disposed between the nonwoven fabric sheets 6 and 7 in a stretched state, and a continuous body of the fit gather laminate 2 fixed to the nonwoven fabric sheets 6 and 7 is formed.

  Then, hot melt is applied to the upper surface side of the continuous body of the reinforcing sheet 3 fed out from the reinforcing sheet roll 22 by the second hot melt applicator 23, and the continuous body of the reinforcing sheet 3 is cut. As shown in FIG. 8, the reinforcing sheet 3 formed by cutting to a predetermined length with the roller 24 and the continuum of the fit gather laminate 2 are sandwiched and pressed by the pressing roller 25, as shown in FIG. At a position corresponding to the non-installation portion of the elastic member 1, the reinforcing sheet 3 is bonded to the lower surface side of the continuous body of the fit gather laminate 2 by hot melt H2.

  Next, hot melt is applied by the third hot melt application machine 27 on the upper surface side of the continuous body of the back sheet 5 fed out from the back sheet roll 26, and then the continuous body of the back sheet 5 is formed by the pressure roller 28. The continuous body of the back sheet 5 is bonded to the lower surface side of the reinforcing sheet 3 by sandwiching the continuous body of the fit gather laminated body 2.

  Next, after placing the absorber 4 supplied from the absorber supply unit 15 on the upper surface side of the fit gather laminate 2, the fit gather laminate in a position corresponding to the non-adhesive portion of the elastic member 1 A continuous body of the material for disposable pants as shown in FIG. 9 is formed by bonding the absorbent body 4 in a state where the absorbent body 4 is positioned on the upper surface side of the continuous body 2.

  The material for disposable pants shown in FIG. 1 is obtained by cutting the continuous material for disposable pants thus formed into a predetermined dimension at the cutting line C2, and the material for disposable pants in the longitudinal direction is obtained. The disposable pants shown in FIG. 3 can be manufactured by folding in half at the intermediate portion and integrally joining the left and right side portions of the fit gather laminate 2 by means of welding or adhesion.

  As described above, the disposable pants according to the present invention have the elastic member 1 disposed in the width direction between the pair of upper and lower nonwoven fabric sheets 6 and 7, and a portion excluding the central portion in the width direction of the nonwoven fabric sheets 6 and 7. While being fixed, the nonwoven fabric sheets 6 and 7 are fixed to the fit gather laminated body 2 in which the elastic member 1 is cut at the center in the width direction, and to the lower surface side of the center in the width direction of the fit gather laminated body 2. The reinforcing sheet 3, the absorber 4 disposed on the upper surface side of the fit gather laminate 2, and the back sheet 5 disposed on the lower surface side of the reinforcing sheet 3 are provided. The elastic member 1 disposed in a portion excluding the central portion in the width direction of the nonwoven fabric sheets 6 and 7 constituting the fit gather laminate 2 expands and contracts to obtain a stable wearing state, occurrence of liquid leakage, etc. Effect It is possible to prevent manner.

  In addition, since the elastic member 1 is not provided at the center in the width direction of the fit gather laminate 2 where the absorber 4 is provided, the absorption member is affected by the expansion and contraction force of the elastic member 1. It can prevent that the installation part of the body 4 deform | transforms. Therefore, there is an advantage that a heel is prevented from being formed in the central portion in the width direction of the disposable pants in which the absorbent body 4 is disposed, and an excellent appearance and stable wearing comfort can be obtained.

  And since the reinforcing sheet 3 is fixed to the lower surface side of the center portion in the width direction of the fit gathers laminated body 2, the elastic member 1 can be used even when the elastic member 1 is cut together with the nonwoven fabric sheets 6 and 7. Can be reinforced by the reinforcing sheet 3. For this reason, the elastic member 1 cut in advance to a predetermined length is disposed and fixed between the nonwoven fabric sheets 6 and 7, or, as shown in the conventional example, the back sheet having the waist gather is moved downward at a predetermined interval. Non-woven sheet without requiring complicated operations such as cutting the waist side elastic body integrated with the back sheet and the non-woven fabric for pressing at the upper end of the folded part to the bottom of the back sheet. Disposable pants in which the elastic member 1 is fixed to portions other than the center portions in the width direction 6 and 7 can be continuously manufactured at a high speed.

  That is, while conveying the continuous body of a pair of nonwoven fabric sheets 6 and 7 constituting the fit gather laminate 2 as described above and the continuous body of the elastic member 1 disposed therebetween, in the longitudinal direction, After the continuum of the elastic member 1 is intermittently fixed to the non-woven fabric sheets 6 and 7, the elastic member 1 is cut together with the non-woven fabric sheets 6 and 7 at the non-fixed portion, and the non-fixed portion of the elastic member 1 is formed. At the corresponding position, the reinforcing sheet 3 is fixed to the portion located on the lower surface side of the fit gathers laminated body 2, the absorber 4 is disposed on the portion located on the upper surface side, and the lower surface of the reinforcing sheet 3 By disposing the back sheet 5 on the side, the disposable pants can be continuously manufactured at a high speed using a manufacturing apparatus having a simple structure.

  Moreover, when the back sheet 5 is disposed on the lower surface side of the reinforcing sheet 3 as described above and the back sheet 5 is configured to cover substantially the entire outer surface of the disposable pants, It is possible to prevent a sense of incongruity caused by a mixture of a plurality of materials and to effectively improve the appearance.

  Moreover, as shown in the said embodiment, when it is comprised so that a character drawing or a character etc. may be displayed on the lower surface side of the sheet | seat 3 for reinforcement, the said through the translucent backsheet 5 which consists of a nonwoven fabric sheet etc. Since the character design and the like can be seen through, the decorativeness of the disposable pants can be effectively improved.

  In order to further improve the adhesion of the disposable pants to the body, as shown by the phantom lines in FIG. 1, the crotch portion B1 located on both sides in the width direction of the fit gather laminate 2 and the longitudinal direction It is desirable to have a structure in which an elastic member made of a linear rubber material or the like is disposed on each of the waist portions B2 located at both ends in the direction.

  In addition, the disposable pants material is folded in half at the middle portion in the longitudinal direction, and the adhesive gathering tape or the mechanical surface is replaced with the embodiment in which the left and right sides of the fit gather laminate 2 are joined together. You may comprise so that the right-and-left both sides of the said material for disposable pants may be detachably joined by the latching member which consists of fasteners.

It is explanatory drawing which shows the expansion | deployment state of the disposable pants which concern on embodiment of this invention. It is the sectional view on the AA line of FIG. It is explanatory drawing which shows embodiment of the disposable pants which concern on this invention. It is explanatory drawing which shows the specific example of the manufacturing apparatus of disposable pants. It is explanatory drawing which shows the state which adhered the elastic member to the nonwoven sheet intermittently. It is explanatory drawing which shows the state which fractured | ruptured the elastic member. It is explanatory drawing which looked at the state which fractured | ruptured the elastic member from the plane. It is explanatory drawing which shows the state which fixed the tape for reinforcement to the fit gathers laminated body. It is explanatory drawing which shows the structure of the continuous body of a disposable pants.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elastic member 2 Fit gather laminated body 3 Reinforcement tape 4 Absorber 5 Back sheet 6,7 Nonwoven fabric sheet

Claims (2)

  Between the pair of upper and lower nonwoven fabric sheets, an elastic member is disposed in the width direction, and is fixed to a portion excluding the center portion in the width direction of the nonwoven fabric sheet, and the elastic member is cut in the center portion in the width direction of the nonwoven fabric sheet. Disposable pants, comprising: a fitted gather laminate, and an absorbent body disposed on an upper surface side of the fit gather laminate in the central portion in the width direction.   While conveying the continuous body of a pair of nonwoven fabric sheet which comprises a fit gather laminated body, and the continuous body of the elastic member arrange | positioned among these to the longitudinal direction, this continuous body of elastic member is made into the said nonwoven fabric sheet. After being fixed intermittently, the elastic member is cut together with the nonwoven sheet at the non-fixed portion thereof, and an absorber is disposed at a portion located on the upper surface side of the fit gather laminate at a position corresponding to the non-fixed portion of the elastic member. A method for producing disposable pants, characterized in that it is provided.

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