JP2007014538A - Disposable absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable absorptive article which can effectively prevent coming off of an external layer member and an absorptive member while maintaining softness, etc. <P>SOLUTION: In this disposable absorptive article 1, reinforcement is achieved by maintaining the softness, etc. of a base material by controlling the giving amount per unit area of hot melt adhesives 43 and 44 about upper side subregions 41a and 42a, on which force in a peeling direction acts comparatively gently, in each of opposite sectors 41 and 42 of the external layer members 2 and 3 on the ventral and dorsal sides and an absorptive member 4 and by reinforcing junction force by increasing by twofold the giving amount per the unit area of the hot melt adhesives 45 and 46 in relation to the upper side subregions 41a and 42a about bottom subregions 41b and 42b on which the force in the peeling direction is easy to act. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disposable absorbent article that is applied to a wearer's crotch and absorbs excrement.

  As a conventional disposable absorbent article, there is one in which an absorbent body is bonded to the skin surface side of two connected bodies divided into an abdominal side and a back side by an E-shaped adhesive layer (Patent Document 1).

Japanese Utility Model Publication No. 4-32718

  However, in the disposable absorbent article described in Patent Document 1, when the connected body is pushed up by the wearer's thigh when worn, a strong peeling force acts on the adhesive layer between the connected body and the absorbent body and comes off. There was a fear. Further, if the amount of the adhesive or the like is simply increased in order to prevent the adhesive layer from coming off, there is a problem that the softness of the absorbent article is impaired and the comfort is deteriorated.

  Therefore, the problem to be solved by the present invention is to provide a disposable absorbent article that can effectively prevent the outer layer member and the absorbent member from coming off while maintaining softness and the like.

  In order to solve the above-mentioned problem, in the invention of claim 1, a disposable absorbent article that is applied to the crotch of the wearer and absorbs excrement, and is provided on the ventral side of the wearer. And on the skin surface side of the abdominal outer layer member and the back outer layer member so as to be applied to the crotch of the wearer, having a back side outer layer member positioned on the back side of the wearer and at least an absorber. An absorptive member joined by a joining adhesive, and at least of the abdominal side outer layer member and the abdominal side facing region and the back side facing region where the back side outer layer member and the absorbent member are opposed to each other The ventral outer layer member and the dorsal outer layer member at least in a portion where the crotch side edge of the ventral outer layer member and the dorsal outer layer member and the absorbent member face each other in any one region. Reinforced joint that reinforces the joint state between the absorbent member and the absorbent member Providing a stage.

  Moreover, in invention of Claim 2, in the disposable absorbent article which concerns on invention of Claim 1, at least any one area | region of the said belly side opposing area | region and the said back side opposing area | region is an upper part area | region and a lower side. The upper partial area is divided into upper and lower parts, and the bonding adhesive is applied to the upper partial area, and the bonding adhesive is applied to the upper partial area as the reinforcing bonding means for the lower partial area. It is given in a larger grant amount than the grant amount per unit area.

  Moreover, in invention of Claim 3, in the disposable absorbent article which concerns on invention of Claim 1, at least any one area | region of the said stomach side opposing area | region and the said back side opposing area | region is an upper part area | region and a lower side. The upper partial area is divided into two in the vertical direction, and for the upper partial area, a hot melt adhesive applied by being discharged from a discharge part separated from the application surface is used as the bonding adhesive, and the lower partial area As for the above, a hot melt adhesive applied by an application part substantially in contact with the application surface is used as the reinforcing joining means.

  According to a fourth aspect of the present invention, in the disposable absorbent article according to the first aspect of the present invention, at least one of the abdomen facing region and the dorsal facing region is an upper partial region and a lower side. The upper partial region is divided into upper and lower parts, an olefin-based hot melt adhesive is applied as the bonding adhesive to the upper partial region, and a rubber-based hot melt is used as the reinforcing bonding means in the lower partial region. A melt adhesive is applied.

  Moreover, in the invention of Claim 5, in the disposable absorbent article according to any one of Claims 2 to 4, the vertical dimension of at least one of the ventral facing area and the dorsal facing area. And the ratio of the upper and lower dimensions of the lower partial region provided in the region is set in a range of 1: 0.04 to 1: 0.7.

  According to the first aspect of the present invention, the ventral outer layer member and the dorsal outer layer member and the absorbent member are opposed to each other in at least one of the ventral facing region and the dorsal facing region. The reinforcement which reinforces the joined state of the abdominal outer layer member, the back side outer layer member, and the absorbent member at least at the portion where the crotch side edge portion of the abdominal side outer layer member and the back side outer layer member faces the absorbent member Since the joining means is provided, the joining state of the part where the crotch side edge of the outer layer member and the absorbent member are most likely to act in the peeling direction from the wearer's thigh, etc. is accurately reinforced. This can effectively prevent the outer layer member and the absorbent member from coming off.

  In addition, the softness of the absorbent article can be maintained by adjusting the ratio of the portion where the reinforcing joining means is provided in at least one of the abdominal facing region and the back facing region. .

  According to the second aspect of the present invention, the force in the peeling direction from the wearer's thigh or the like in the facing region where the abdominal or dorsal outer layer member and the absorbent member face each other easily acts. The lower partial area is reinforced by increasing the applied amount per unit area of the adhesive, and the upper partial area where the force in the peeling direction in the opposing area acts relatively gently Since it is the structure which suppresses the amount of hits and maintains the softness of the base material, it is possible to effectively prevent the outer layer member and the absorbent member from coming off while maintaining the softness of the absorbent article. .

  According to the invention described in claim 3, the force in the peeling direction from the wearer's thigh or the like is likely to act in the facing region where the abdominal or dorsal outer layer member and the absorbent member face each other. For the lower part area, the hot melt adhesive applied by the contact coating method advantageous for securing the bonding strength is used as the reinforcing bonding means, and the upper part where the force in the peeling direction in the opposite area acts relatively gently. As for the region, a hot melt adhesive applied by a non-contact coating method that is advantageous for maintaining the softness of the substrate is used as a bonding adhesive, so that the softness of the absorbent article is maintained. The outer layer member and the absorbent member can be effectively prevented from coming off.

  According to the invention described in claim 4, the force in the peeling direction from the wearer's thigh or the like in the facing region where the abdominal or dorsal outer layer member and the absorbent member face each other easily acts. For the lower partial region, a rubber-based hot-melt adhesive excellent in bonding maintenance ability against peeling stress is applied, and for the upper partial region where the force in the peeling direction in the opposing region acts relatively gently, Olefin-based hot-melt adhesive that is advantageous for maintaining the softness of the base material is used, so that it is effective for the outer layer member and the absorbent member to be detached while maintaining the softness of the absorbent article. Can be prevented.

  According to the fifth aspect of the present invention, the upper and lower dimensions of the facing region where the abdominal or dorsal outer layer member and the absorbent member face each other, and the lower side that reinforces the joined state provided in the region. Since the ratio of the vertical dimension of the partial area is set within a range of 1: 0.04 to 1: 0.7, the softness of the absorbent article is reinforced by reinforcement applied to the lower partial area. It is possible to effectively prevent the outer layer member and the absorbent member from coming off while preventing the damage.

  1 is a perspective view of a disposable absorbent article according to an embodiment of the present invention, FIG. 2 is a view showing a state in which the disposable absorbent article of FIG. 1 is developed, and FIG. It is a figure which shows the structure of the junction part of a side outer layer member and an absorptive member.

  The disposable absorbent article 1 is, for example, a pants-type disposable diaper. As shown in FIGS. 1 and 2, the abdomen outer layer member 2 and the back side provided on the outer surface side of the absorbent article 1 are divided into front and rear sides. A front abdomen A and a back part that are provided with the outer layer member 3 and the absorbent member 4 joined to the skin surface side of the outer layer members 2 and 3 and are respectively applied to the wearer's front, back and crotch B and crotch C. In the present embodiment, a pant-type diaper is given as a specific example of the absorbent article 1, but the technology related to the absorbent article 1 of the present embodiment can be deployed with a hook-and-loop fastener or the like. It may be applied to diapers.

  The abdominal side outer layer member 2 has a substantially horizontally long rectangular sheet shape, and constitutes a front abdomen A applied to the wearer's front abdomen. A plurality of waist elastic members 11 are provided on the upper edge portion of the ventral outer layer member 2 to form a ventral waist gather portion 12. A plurality of leg elastic members 13 are provided on the left and right sides of the lower edge of the ventral outer layer member 2 to form ventral leg gather portions 14. A plurality of body elastic members 15 are provided on the left and right sides of the middle region in the vertical direction of the ventral outer layer member 2 to form a ventral body gathering portion 16. Such a ventral outer layer member 2 is formed, for example, by sandwiching elastic members 11, 13, and 15 between two sheet materials.

  The back side outer layer member 3 has a form in which a substantially horizontally long rectangular sheet-like rear back part 3a and a substantially trapezoidal sheet-like collar part 3b are integrally connected, and is applied to the back part and the hip part on the wearer's back side. It is like that. A plurality of waist elastic members 21 are provided on the upper edge portion of the back-side outer layer member 3 to form a back-side waist gather portion 22. A plurality of leg elastic members 23 are provided on the left and right sides of the crotch side edge portion of the heel portion 3b of the back side outer layer member 3, and a back leg gather portion 24 is formed. A plurality of body elastic members 25 are provided to form back-side body gather portions 26 in the left and right side portions in the middle region in the vertical direction of the back portion 3 a of the back-side outer layer member 3. Such a back-side outer layer member 3 is formed, for example, by sandwiching elastic members 21, 23, 25 between two sheets.

  The absorptive member 4 includes a main body portion 32 having an absorbent body 31 and pleated upright portions (solid gathers) 33 provided on the left and right sides of the main body portion 32, and has a substantially vertically long rectangular sheet shape. Have. The main body 32 is configured by sandwiching an absorber 31 between a liquid-permeable top sheet 34 and a liquid-impermeable back sheet 35. The absorber 31 has a substantially hourglass-shaped planar shape. The standing portion 33 is provided with a plurality of elastic members 36 for raising the standing portion 33 toward the wearer's skin side when worn.

  As shown in FIG. 2, the absorbent member 4 has a skin between the outer layer members 2 and 3 so as to straddle between the abdominal outer layer member 2 and the back outer layer member 3 which are arranged at intervals in the front and rear direction. It is joined to the surface side.

  Then, the left and right edges 37 of the ventral outer layer member 2 and the left and right edges 38 of the back outer layer member 3 are joined by a joining means such as ultrasonic welding or heat welding. As a result, a waist opening Q is formed by the waist gathers 12 and 22 of the ventral outer layer member 2 and the back outer layer member 3, and leg gathers 14 and 24 of the ventral outer layer member 2 and the back outer layer member 3. Left and right leg openings R are formed by portions 39 located between the outer layer members 2 and 3 at the left and right edge portions of the absorbent member 4.

  Next, the structure for joining the outer layer members 2 and 3 and the absorbent member 4 will be described. As schematically shown in FIG. 3, the outer layer member is formed by hot melt adhesives 43 to 46 applied to the abdomen facing region 41 and the back facing region 42 where the absorbent member 4 and the outer layer members 2 and 3 face each other. 2 and 3 and the absorptive member 4 are joined. Here, the hot-melt adhesives 43 and 44 correspond to the bonding adhesive according to the present invention, and the hot-melt adhesives 45 and 46 correspond to the reinforcing bonding means according to the present invention.

  More specifically, each of the opposing areas 41 and 42 is vertically divided into an upper partial area 41a and 42a located on the waist opening Q side and a lower partial area 41b and 42b located on the crotch side. . The lower partial regions 41 b and 42 b are provided in the portion along the crotch side edge of the ventral outer layer member 2 and the crotch side edge of the collar portion 3 b of the back outer layer member 3, and occupy the opposing regions 41 and 42. The proportion is kept relatively small. Specifically, the ratio between the vertical dimensions S1 and S2 of the facing areas 41 and 42 and the vertical dimensions S1a and S2a of the lower partial areas 41b and 42b provided in the areas 41 and 42 is 1 to 0.04. To 1 to 0.7 (more preferably, 1 to 0.04 to 1 to 0.5). More specifically, the ratio of the dimension S1a to the dimension S1 is set to about 1 to 0.15, for example, and the ratio of the dimension S2a to the dimension S2 is set to about 1 to 0.07, for example.

  Then, hot melt adhesives 43 and 44 for securing basic bonding strength between the outer layer members 2 and 3 and the absorbent member 4 are applied to the upper partial regions 41 and 42 in the facing regions 41 and 42, respectively. The As the hot melt adhesives 43 and 44, for example, an olefin-based hot melt adhesive or a rubber-based hot melt adhesive is used.

  Further, in the lower partial regions 41b and 42b in the opposing regions 41 and 42, hot melt adhesives 45 for reinforcing the joining state of the outer layer members 2 and 3 and the absorbent member 4 by the hot melt adhesives 43 and 44, 46 is given. As a configuration for realizing this reinforcing function, in the present embodiment, the same type of adhesive as the hot-melt adhesives 43 and 44 is applied to the lower partial regions 41b and 42b, and the upper partial regions 41a and 41b of the adhesives 43 and 44, respectively. It is applied as hot melt adhesives 45 and 46 in an application amount larger than the application amount per unit area to 42a. More specifically, for example, the application amount per unit area of the hot melt adhesives 45 and 46 to the lower partial regions 41b and 42b is the unit to the upper partial regions 41a and 42a of the hot melt adhesives 43 and 44. It is set to be twice the applied amount per area.

  Application | coating of the hot-melt-adhesives 43-46 is performed as follows, for example. A hot melt adhesive is applied to the entire opposing regions 41 and 42 of the absorbent member 4, and then the same type of hot melt adhesive is applied over the lower partial regions 41 b and 42 b. Application | coating of the hot-melt-adhesive at this time is performed using the curtain spray coating device which is a non-contact-type coating device as shown in FIG. 4, for example. In this apparatus, while the absorbent member 4 is transported in a predetermined transport direction D, the hot melt adhesive is discharged and applied in a curtain form from a discharge portion 51 installed away from the absorbent member 4. ing.

  Thus, the outer layer members are formed by the hot melt adhesives 43 and 44 applied to the upper partial regions 41a and 42a, which occupy a large area ratio in each of the opposing regions 41 and 42 between the outer layer members 2 and 3 and the absorbent member 4. The basic joining between 2, 3 and the absorbent member 4 is ensured. In addition, regarding the lower partial regions 41b and 42b along the crotch side edges of the outer layer members 2 and 3 where the force in the peeling direction from the wearer's thighs or the like in the facing regions 41 and 42 is likely to act. The application amount per unit area of the hot-melt adhesives 45 and 46 is doubled with respect to the upper partial regions 41a and 42a to enhance the bonding force, and in the peeling direction given from the wearer's thighs and the like. Reinforcement against force is performed.

  As described above, according to the present embodiment, in the opposing regions 41 and 42 between the outer layer members 2 and 3 and the absorbent member 4, the upper partial regions 41 a and 42 a where the force in the peeling direction acts relatively gently. For the lower partial regions 41b and 42b, in which the application amount of the hot melt adhesives 43 and 44 per unit area is suppressed to maintain the softness of the base material and the force in the peeling direction is easily applied, Since the application amount per unit area of the agents 45 and 46 is doubled with respect to the upper partial regions 41a and 42a, the bonding force is enhanced, and the reinforcement is achieved. It can prevent effectively that outer layer members 2 and 3 and absorptive member 4 slip off, maintaining.

  Moreover, the softness | flexibility etc. of the absorbent article 1 can be maintained by adjusting the ratio etc. of the lower side partial area | region 41b, 42b for reinforcement in each opposing area | region 41,42. In this regard, the ratio between the vertical dimensions S1 and S2 of the opposing areas 41 and 42 and the vertical dimensions S1a and S2a of the lower partial areas 41b and 42b provided in the areas 41 and 42 is 1 to 0.04. Is set within a range of 1 to 0.7 (more preferably, a range of 1 to 0.04 to 1 to 0.5), so that the reinforcement is applied to the lower partial regions 41b and 42b. It is possible to effectively prevent the outer layer members 2 and 3 and the absorbent member 4 from coming off while preventing the softness of the absorbent article 1 from being damaged.

  Moreover, since the hot-melt adhesives 43 to 46 are used as the joining means between the outer layer members 2 and 3 and the absorbent member 4, the outer layer members 2 and 3 and the absorbent member 4 are joined when the disposable absorbent article 1 is designed. Strength and softness can be easily controlled.

<Modification>
The following two configurations can be adopted as modified examples of the joining mode between the outer layer members 2 and 3 and the absorbent member 4 described above.

  As a first modification related to this, hot-melt adhesives 43 to 46 in the upper partial areas 41a and 42a and the lower partial areas 41b and 42b of the opposed areas 41 and 42 between the outer layer members 2 and 3 and the absorbent member 4 are used. It is possible to adopt a configuration that changes the coating type. Specifically, for example, the lower partial regions 41b and 42b on which the force in the peeling direction from the wearer's thighs or the like is likely to act are applied by the hot melt adhesive 45, 46 is applied. About the upper part area | region 41a, 42a to which the force of a peeling direction acts comparatively gently, the hot melt adhesives 43 and 44 are apply | coated by the non-contact application method advantageous in maintaining the softness of the absorbent article 1, etc. .

  In the case of the contact coating method, for example, a contact type coating apparatus as shown in FIG. 5 is used, and the absorbent member 4 is substantially in contact with the application surface of the absorbent member 4 while being transported in the predetermined transport direction D. Hot melt adhesives 45 and 46 are applied by the application part 52. In the illustrated example of FIG. 5, the hot melt adhesives 45 and 46 are applied in a stripe shape, but may be applied so as to be continuously connected in a planar shape. In the case of the non-contact coating method, for example, the hot melt adhesives 43 and 44 are applied using the above-described non-contact type coating apparatus shown in FIG.

  In the case of the first modification, the hot melt adhesives 43 and 44 applied to the upper partial regions 41a and 42a and the hot melt adhesives 45 and 46 applied to the lower partial regions 41b and 42b are of the same type. A thing may be used and a different thing may be used. For example, in the former case, a configuration using an olefin-based or rubber-based hot-melt adhesive as the hot-melt adhesives 43 to 46 can be adopted, and in the latter case, an olefin-based hot-melt adhesive can be used as the hot-melt adhesives 43, 44. It is possible to employ a configuration in which an adhesive is used and a rubber-based hot melt adhesive is used for the hot melt adhesives 45 and 46.

  Even with the configuration according to the first modification, it is possible to effectively prevent the outer layer members 2 and 3 and the absorbent member 4 from being detached while maintaining the softness of the absorbent article 1 and the like. can get.

  Further, as a second modified example regarding the joining form of the outer layer members 2 and 3 and the absorbent member 4, hot melt adhesive is used in the upper partial regions 41 a and 42 a and the lower partial regions 41 b and 42 b of the facing regions 41 and 42. The structure which changes the kind of 43-46 is employable. Specifically, for example, the lower partial regions 41b and 42b in which the forces in the peeling direction from the wearer's thighs and the like in each of the opposed regions 41 and 42 are likely to act are excellent in the ability to maintain the bonding against the peeling stress. The upper partial regions 41a and 42a, which use the rubber-based hot-melt adhesives 43 and 44 and the force in the peeling direction acts relatively gently, are advantageous in maintaining the softness of the base material. A configuration using hot melt adhesives 45 and 46 of the system can be adopted. Even with such a configuration, it is possible to effectively prevent the outer layer members 2 and 3 and the absorbent member 4 from being detached while maintaining the softness of the absorbent article 1.

  In the above-described embodiment, the hot melt adhesives 45 and 46 are used as the reinforcing bonding means. However, other bonding means such as ultrasonic welding and heat welding may be used as the reinforcing bonding means. In this case, it is desirable to apply the hot melt adhesives 43 and 44 to the entire surface of the opposed regions 41 and 42.

  In the above-described embodiment, the lower partial regions 41b and 42b for reinforcement are provided for both of the two opposing regions 41 and 42. However, the lower partial region is provided for only one of the opposing regions 41 and 42. 41b and 42b may be provided.

  Moreover, in the above-mentioned embodiment, although the hot-melt-adhesives 43-46 were used as a joining means of the outer layer members 2 and 3 and the absorptive member 4, you may use another adhesive agent.

It is a perspective view of the disposable absorbent article which concerns on one Embodiment of this invention. It is a figure which shows the state which expand | deployed the disposable absorbent article of FIG. It is a figure which shows the structure of the junction part of an abdominal side outer layer member and a back side outer layer member, and an absorptive member. It is a figure which shows the application | coating process of the hot-melt-adhesive using a non-contact-type coating device. It is a figure which shows the application | coating process of the hot-melt-adhesive using a contact-type coating device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Disposable absorbent article, 2 Abdominal outer layer member, 3 Back outer layer member, 4 Absorbent member, 31 Absorber, 41 Abdominal facing area, 41a Upper partial area, 41b Lower partial area, 42 Back facing area, 42a Upper partial region, 42b Lower partial region, 43 to 46 Hot melt adhesive, S1, S1a, S2, S2a Vertical dimension.

Claims (5)

A disposable absorbent article that is applied to the wearer's crotch and absorbs excreta,
A ventral outer layer member located on the ventral side of the wearer;
A dorsal outer layer member located on the back side of the wearer;
An absorbent member having at least an absorbent body and bonded to the skin surface side of the abdominal outer layer member and the back outer layer member with a bonding adhesive so as to be applied to the crotch of the wearer;
With
At least the ventral outer layer member in at least one of the ventral facing region and the dorsal facing region in which the ventral outer layer member and the dorsal outer layer member and the absorbent member are opposed to each other, and Reinforcing joining means for reinforcing the abdomen outer layer member and the joining state of the dorsal outer layer member and the absorptive member to a portion where the crotch side edge of the dorsal outer layer member and the absorptive member are opposed to each other. A disposable absorbent article characterized by comprising: The disposable absorbent article according to claim 1,
At least one of the ventral facing area and the dorsal facing area is vertically divided into an upper partial area and a lower partial area,
For the upper partial region, the bonding adhesive is applied,
For the lower partial region, the disposable absorbent article is characterized in that the bonding adhesive is applied in a larger application amount per unit area to the upper partial region as the reinforcing bonding means. . The disposable absorbent article according to claim 1,
At least one of the ventral facing area and the dorsal facing area is vertically divided into an upper partial area and a lower partial area,
For the upper partial region, a hot melt adhesive applied by being discharged from a discharge part separated from the application surface is used as the bonding adhesive,
A disposable absorbent article characterized in that, for the lower partial region, a hot melt adhesive applied by an application part substantially in contact with the application surface is used as the reinforcing joining means. The disposable absorbent article according to claim 1,
At least one of the ventral facing area and the dorsal facing area is vertically divided into an upper partial area and a lower partial area,
An olefin-based hot melt adhesive is applied to the upper partial region as the bonding adhesive,
A disposable absorbent article, wherein a rubber-based hot melt adhesive is applied as the reinforcing joining means to the lower partial region. The disposable absorbent article according to any one of claims 2 to 4,
The ratio between the vertical dimension of at least one of the ventral facing area and the back facing area and the vertical dimension of the lower partial area provided in the area is from 1: 0.04. A disposable absorbent article characterized by being set within a range of 1: 0.7.

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