JP2019115584A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which is equipped with a stretching tape for post-processing and can be cleanly abandoned.SOLUTION: An absorbent article (10) has: a back and forth direction (L); a width direction (W) orthogonal to the back and forth direction (L); a rear surface sheet (22) directed opposite the skin of a wearer; and a tape member (60) for post-processing stretchable in an extension direction. The tape member (60) has: a fixed part (62) fixed on the rear surface sheet (22); and a non-fixed part (64) not fixed on the rear surface sheet (22). Tensile strength of the rear surface sheet (22) per width the same as the width of the fixed part (62) in the direction orthogonal to the extension direction is greater than a tensile force necessary for extending length of the non-fixed part (64) of the tape member (60) 1.5 times.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an absorbent article provided with a tape for post-treatment.

  Absorbent articles such as sanitary napkins, panty liners, adult incontinence pads or fecal pads are attached to the inside of the worn articles worn by the wearer when in use. In general, an absorbent article attached to the inside of a wearing article has an adhesive portion for preventing displacement of the absorbent article relative to the wearing article. This adhesive part is provided in the surface on the opposite side to the skin surface side (side facing the wearer's skin) of the absorbent article.

  Patent Document 1 discloses an absorbent article such as a disposable diaper or a sanitary napkin provided with a fastening tape for post-treatment. The fastening tape comprises a base fixed to the back sheet (back sheet) and an extensible extension connected to the base. The fastening tape has two bent portions that divide the fastening tape into approximately three equal parts in the length direction of the fastening tape. The fastening tape is folded in three at this fold. The extension is releasably adhered to the base by a weak adhesive surface. The adhesive portion of the extension can be adhered to the back sheet of the absorbent article upon disposal by means of a strong adhesive surface.

Japanese Patent Application No. 7-298334

  In the fastening tape described in Patent Document 1, the material of the fastening tape itself can be stretched. In such a stretchable fastening tape, the inventor of the present invention discovered that in such a case, the back sheet to which the fastening tape is fixed is excessively loaded, which causes the back sheet to be torn. did.

  Here, when the back sheet is broken, the body fluid may leak from the absorber that has absorbed the body fluid, which may hinder the clean disposal of the absorbent article.

  Therefore, it is desirable to have a more disposable disposable absorbent article with an expanding post-treatment tape.

  An absorbent article according to one aspect includes a back sheet oriented in the front-rear direction, a width direction orthogonal to the front-rear direction, and a back sheet directed to the side opposite to the wearer's skin, and a post-treatment tape member expandable in the stretching direction And the tape member has a fixed portion fixed to the back sheet and a non-fixed portion not fixed to the back sheet, and the fixed portion in a direction orthogonal to the extending direction The tensile strength of the backsheet per width, which is the same as the width of the tape, is higher than the tensile force required to stretch the length of the non-fixed part of the tape member by 1.5 times.

FIG. 1 is a plan view of the absorbent article according to the first embodiment viewed from the skin surface side. FIG. 2 is a plan view of the absorbent article according to the first embodiment as viewed from the non-skin surface side. FIG. 3 is a perspective view of the absorbent article in a state of being wound in the front-rear direction. FIG. 4 is a plan view of the absorbent article according to the second embodiment as viewed from the non-skin surface side.

(1) Outline of Embodiment At least the following matters will become clear by the description of the present specification and the attached drawings.

  An absorbent article according to one aspect includes a back sheet oriented in the front-rear direction, a width direction orthogonal to the front-rear direction, and a back sheet directed to the side opposite to the wearer's skin, and a post-treatment tape member expandable in the stretching direction And the tape member has a fixed portion fixed to the back sheet and a non-fixed portion not fixed to the back sheet, and the fixed portion in a direction orthogonal to the extending direction The tensile strength of the backsheet per width, which is the same as the width of the tape, is higher than the tensile force required to stretch the length of the non-fixed part of the tape member by 1.5 times.

  According to this aspect, the tensile strength of the back sheet per width equal to the width of the fixed portion in the direction orthogonal to the drawing direction is necessary to expand the length of the non-fixed portion of the tape member by 1.5 times Higher than normal tension. Therefore, even if the tape member is pulled so as to extend the length of the non-fixed portion of the tape member by 1.5 times, the possibility of the back sheet being broken decreases, and the body fluid leaks from the absorber that has absorbed the body fluid Can be suppressed. Therefore, the absorbent article can be disposed of cleanly.

  According to a preferred embodiment, the tensile strength of the back sheet per width equal to the width of the fixed portion in the direction orthogonal to the drawing direction is to be broken by pulling the non-fixed portion of the tape member. Higher than the required tensile force.

  Even if the tape member is pulled strongly, the tape member is broken before the back sheet is broken. Therefore, leakage of the body fluid from the absorber which has absorbed the body fluid can be further suppressed.

  According to a preferred aspect, the surface of the non-fixed portion of the tape member does not have an adhesive. When the non-fixed portion of the tape member is stretched in the stretching direction, the non-fixed portion of the tape member is necked in the direction orthogonal to the stretching direction. Here, when the non-fixed portion has the adhesive material, the non-fixed portion of the tape member is easily warped in the width direction due to the difference in stretchability between the adhesive material and the tape member. If the non-fixed portion of the tape member warps, the tape member itself may stick to the adhesive material of the tape member. According to this aspect, since the surface of the non-fixed portion of the tape member does not have the adhesive material, it is possible to prevent the tape member itself from sticking to the adhesive material of the tape member.

  According to a preferred aspect, when the length of the non-fixed portion of the tape member is expanded 1.5 times, the width of the non-fixed portion of the tape member is 5 mm or more.

  Even if the non-fixed portion of the tape member is necked in by the expansion of the non-fixed portion of the tape member, the width of the non-fixed portion of the tape member can be secured. Easy to do.

  The width of the fixing portion in the direction orthogonal to the drawing direction is shorter than the width of the tape member in the direction perpendicular to the drawing direction.

  Thus, when the non-fixed portion of the tape member is pulled, a strong force is applied in the stretching direction at the width of the fixed portion shorter than the entire width of the tape member. Therefore, the tensile force required to stretch the non-fixed portion of the tape member can be reduced.

  According to a preferable aspect, the width of the fixing portion in the direction orthogonal to the extending direction is half or more of the width of the tape member in the direction orthogonal to the extending direction.

  By increasing the width of the fixing portion in the direction orthogonal to the stretching direction, it is possible to suppress the non-fixed portion of the tape member from rolling in the width direction. As a result, the non-fixed portion of the tape member can be easily maintained in a flat state, and the absorbent article can be easily fixed in a rolled-up state by the tape member.

  According to a preferred embodiment, the absorbent article has an absorber on the skin surface side of the back sheet, and the non-fixed portion of the tape member is provided at a position away from the absorber in the thickness direction. ing.

  When the absorber absorbs a liquid such as the body fluid of the wearer, the back sheet overlapping the absorber in the thickness direction is twisted, and wrinkles are generated on the back sheet. If the tape member is present at such a place where the wrinkles occur, the occurrence of the wrinkles partially creates a space between the tape member and the back sheet. As a result, the tape member can not be in close contact with the back sheet, and the tape member is easily rubbed against the back sheet and worn while wearing the absorbent article. As a result, the tape member curls or bends in the width direction, making it difficult to use the tape member. In this aspect, the non-fixed portion of the tape member is provided at a position away from the absorber in the thickness direction, that is, at a position where wrinkles are less likely to occur in the back sheet even if the absorber absorbs liquid. Therefore, the tape member can be prevented from curling or bending in the width direction during wearing.

  According to a preferred embodiment, the backsheet has an adhesive portion provided on the non-skin surface side.

  The adhesive article provided on the non-skin side of the back sheet can fix the absorbent article to the clothes of the wearer. In addition, when the absorbent article is discarded, the absorbent article can be maintained in a rounded state by causing the tape member to adhere to the adhesive portion provided on the non-skin surface side of the back sheet. As described above, the adhesive portion can be used both for fixing clothes and for stopping the post-processing tape member.

  According to a preferred aspect, the adhesive portion is provided on an imaginary line extending the tape member in a direction opposite to the extending direction.

  Accordingly, when the tape member is stretched straight in the stretching direction in a state where the absorbent article is wound, the non-fixed portion of the tape member is positioned at the adhesive portion. Therefore, the user can easily maintain the absorbent article in the rolled state without pulling the tape member obliquely to the position of the adhesive portion.

  According to a preferred aspect, the width of the adhesive portion provided on the imaginary line in the direction orthogonal to the extending direction is larger than the width in the direction orthogonal to the extending direction of the tape member.

  Thus, when the tape member is stretched in the stretching direction in a wound state of the absorbent article, even if the tape member is not straight but bent slightly and pulled out, the non-fixed portion of the tape member is at the adhesive portion. To position. Therefore, the user can easily attach the tape member to the adhesive part.

  According to a preferred embodiment, the surface of the tape member in contact with the adhesive portion is smooth.

  Since the surface of the tape member in contact with the adhesive portion is smooth, the contact area of the tape member with the adhesive portion can be increased. Thereby, when making a tape member stick on an adhesion part in the state where rolled up an absorptive article, it can control that a tape member removes from an adhesion part.

According to a preferred embodiment, the bonding strength of the tape member when the non-fixed portion of the tape member is fixed to the adhesive portion with a force of 30 g / cm ^{2 in} the thickness direction is 0.5 N or more.

  It is suppressed that a tape member peels from an adhesion part, and it becomes easy to maintain an absorptive article in the state where it was rolled up.

  According to a preferred aspect, the adhesive part is provided outside the movable range of the non-fixed part not accompanied by the extension of the non-fixed part in the unfolded state of the absorbent article.

  It can prevent that a tape member adheres to an adhesion part during wearing of an absorptive article.

(2) Configuration of Absorbent Article Hereinafter, an absorbent article according to the embodiment will be described with reference to the drawings. The absorbent article may be an absorbent article such as a sanitary napkin, panty liner, breast milk pad, adult incontinence pad, fecal pad or sweat sheet. In particular, the absorbent article may be an article attached to and used on the inside of a wearing article such as a user's underwear.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and ratios of dimensions may be different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, there may be a case where the dimensional relationships and ratios differ among the drawings.

  FIG. 1 is a plan view of the absorbent article according to the first embodiment viewed from the skin surface side. FIG. 2 is a plan view of the absorbent article according to the first embodiment as viewed from the non-skin surface side. Here, the "skin surface side" corresponds to the side facing the skin of the wearer during use. The "non-skin side" corresponds to the side that is turned against the skin of the wearer during use.

  The absorbent article has a longitudinal direction L and a width direction W. The front-rear direction L is a direction extending from the front side (ventral side) to the rear side (back side) of the wearer, or a direction extending from the rear side to the front side of the wearer. The width direction W is a direction orthogonal to the front-rear direction L.

  The absorbent article 10 includes a top sheet 20 facing the wearer's skin, a back sheet 22 directed to the side opposite to the wearer's skin, and an absorbent body 30 between the top sheet 20 and the back sheet 22. It has a main part which contains. The top sheet 20 faces the wearer's skin during use. The backsheet 22 is directed away from the wearer's skin during use. The absorbent body 30 extends in the front-rear direction L of the absorbent article.

  The absorbent article 10 may have wings 40 and hip flaps 50. The wing 40 is folded back to the non-skin side of the crotch portion of the worn article during use. The hip flap 50 is a portion that bulges in the width direction W behind the wing 40. The hip flap 50 is a portion that bulges outward beyond the outer edge of the absorber 30 in the width direction W.

  Absorbent article 10 has excretory opening opposite area S1 which counters a wearer's excretory opening (for example, vaginal opening) during use. The discharge port facing area S1 corresponds to a crotch of the wearer, that is, an area disposed between the legs of the wearer and in which the absorber 30 is present. In addition, in the absorbent article 10 having the wings 40, the excretion opening facing area S1 is between the wings 40 and corresponds to an area where the absorber 30 is present.

  As shown in FIG. 2, the absorbent article 10 has adhesive portions 42, 52, 70 provided on the non-skin surface side of the back sheet 22. The adhesive portions 42, 52, 70 are regions provided with an adhesive for stopping the absorbent article 10 on the wearing article. The adhesive unit includes a main unit adhesive unit 70, a wing adhesive unit 42, and a flap adhesive unit 52.

  The adhesive article 42, 52, 70 provided on the non-skin surface side of the back sheet 22 can fix the absorbent article to the wearer's clothing such as a short. When winding the absorbent article after use of the absorbent article 10, the post-processing tape member 60 can be attached to the adhesive portions 42, 52, 70. Therefore, the adhesive portions 42, 52, 70 can be used in two ways, one for fixing the clothes and the other for fixing the post-processing tape member.

  The main-body adhesive unit 70 is provided in a region overlapping the absorber 30 in the thickness direction of the absorbent article. It is preferable that the main body adhesive portion 70 extends continuously or intermittently to the rear of the absorbent article 10 at least from the discharge port facing area S1. The main body adhesive portion 70 extends in the front-rear direction L, and a plurality of main body adhesive portions 70 may be provided at intervals in the width direction W.

  The wing adhesion section 42 is provided on the wing 40. The wing 40 is folded back to the worn article of the wearer during use, and attached to the non-skin side of the worn article by the wing adhesive 42. The flap adhesive portion 52 is provided on the hip flap 50.

  The absorbent article 10 may have at least two fold lines extending along the width direction W. In the example shown to FIG.1, 2, the absorbent article 10 has three fold lines F1-F3. These folding lines F1 to F3 are lines for folding the absorbent article at the time of packaging the absorbent article.

  The absorbent article 10 further has a tape member 60 disposed on the non-skin side of the back sheet 22 inside the outer edge of the absorbent article 10. Therefore, the tape member 60 is hidden by the absorbent article 10 when viewed from the skin surface side.

  The tape member 60 is configured to be extensible so as to extend outward beyond the outer edge of the absorbent article 10. Here, "extension" includes extension by "elastic deformation" or "plastic deformation". In the present specification, the tape member 60 is preferably configured to be plastically deformable. As an example, the tape member 60 may be composed of a stretchable sheet. In this case, when the wearer pulls on the tape member 60, the tape member 60 extends outward beyond the outer edge of the absorbent article 10.

  The tape member 60 is a post-treatment tape, and may be extended to an extent that the absorbent article 10 can be attached to the main adhesive unit 70 in a rolled state. Also, the tape member 60 may be made of any material that can be attached to the main adhesive unit 70. Preferably, the tape member 60 is made of a material that adheres more easily to the main adhesive portion 70 than the top sheet 20.

  The tape member 60 has a fixing portion 62 fixed to the main body of the absorbent article 10, particularly to the non-skin surface of the absorbent article 10. That is, the fixing portion 62 of the tape member 60 is fixed to the back sheet 22. Further, the tape member 60 has a non-fixed portion 64 which is not fixed to the main body portion, in particular to the back sheet 22. The surface of the non-fixed portion 64 of the tape member 60 may not have an adhesive.

  At least the non-fixed portion 64 of the tape member 60 is configured to be extensible in the stretching direction. Since at least the non-fixed portion 64 of the tape member 60 is configured to be extensible in the stretching direction, when the wound absorbent article 10 is fixed by the tape member 60, the absorbent article 10 can be easily fixed by the tape member 60. Can be done (see Figure 4).

  The tape member 60 may be constituted by a single unfolded sheet. Thereby, compared with the tape member folded in a plurality of layers, at the time of wearing of an absorptive article, the sense of incongruity (fall of a feeling of touch) given to a wearer can be controlled more.

  During wear of the absorbent article 10, a part of the tape member 60 may be in direct contact with the skin of the wearer because the end of the sheet near the post-processing tape member 60 is curled. Even in this case, since the non-fixed portion 64 of the tape member 60 is not provided with the adhesive material, the tape member 60 can be prevented from adhering to the skin of the wearer.

  In addition, since the non-fixed portion 64 of the tape member 60 is not provided with the adhesive, it is possible to prevent the problem that the tape member sticks to the adhesive of the tape member itself during wearing.

  Specifically, when the non-fixed portion 64 of the tape member 60 is stretched in the stretching direction, the non-fixed portion 64 of the tape member 60 will neck in a direction orthogonal to the stretching direction. Here, when the non-fixed portion 64 has an adhesive material, the non-fixed portion 64 of the tape member 60 is easily warped in the width direction due to the difference in stretchability between the adhesive material and the tape member 60. If the non-fixed portion 64 of the tape member 60 warps, the tape member itself may stick to the adhesive of the tape member 60. When the surface of the non-fixed portion 64 of the tape member 60 does not have the adhesive, the tape member 60 itself can be prevented from sticking to the adhesive of the tape member 60.

An example of a concrete structure of the absorbent article of this Embodiment is shown. The top sheet may be constituted by an air through non-woven fabric (PE / PET) having a basis weight of 30 g / m ² . A second sheet may be provided between the top sheet and the absorbent core. The second sheet may be made of the same material as the top sheet. A surface sheet may not be arrange | positioned on the outer side of the width direction of a main-body part, but a side sheet may be arrange | positioned. The side sheet may be constituted by an SMS nonwoven fabric (PP) having a basis weight of 13 g / m ² . The absorbent material of the absorbent core may be composed of softwood kraft pulp and a superabsorbent polymer. The ratio of the weight of superabsorbent polymer to the weight of the whole absorbent material may be 10%. The basis weight of the absorbent core in the area including the excretion port facing area S1 may be higher than the basis weight of the surrounding absorbent core. The basis weight of the absorbent core in the area including the excretion port facing area S1 may be 950 g / m ² , and the basis weight of the surrounding absorbent core may be 300 g / m ² . The back sheet may be constituted by a polyethylene film (non-air-permeable type) with a basis weight of 23.5 g / m ² . The absorbent article may have a pressing portion in which the top sheet and the absorbent core are pressed in the thickness direction. The main body adhesive portion may be made of a rubber-based hot melt adhesive. The basis weight of the adhesive part of the main body may be 27 g / m ² . There may be six main body adhesive portions spaced in the width direction. The length in the width direction of each main-body adhesive portion may be 5 mm, and the length in the front-rear direction of each main-body adhesive portion may be 320 mm. The length of the absorbent article in the front-rear direction may be 420 mm, and the length of the absorbent article in the width direction may be 200 mm. The tape member for post-treatment may be composed of a polyethylene film having a basis weight of 35 g / m ² . The longitudinal length of the tape member may be 45 mm, and the lateral length of the tape member may be 25 mm. The tape member may be fixed to the main body by a 100 g / m ² rubber-based hot melt adhesive. The adhesive may be applied in the range of 21 mm wide and 5 mm long. Printing may be applied to the surface on the back sheet side of the tape member. The printing may use a urethane ink of pink thread. As the tape member extending polypropylene layer having a basis weight of 10 g / ^{m 2,} a styrene-based rubber layer of 10 g / ^{m 2,} and may be constituted by a stack of basis weight polypropylene layer of 10 g / ^{m 2.}

  The free end of the tape member 60 may be directed to the end in the extension direction on the side opposite to the fixing portion 62. In this case, when extending the tape member 60 outside the outer edge of the absorbent article 10, a force acts only on the fixing portion 62 of the tape member 60 in the extending direction. As a result, no force is applied to the fixing portion 62 of the tape member, so that the fixing strength of the tape member 60 can be maintained.

  After the user winds the absorbent article 10 in the back and forth direction L after using the absorbent article 10, the tape member 60 can be extended outside the outer edge of the absorbent article 10 (see FIG. 4). During use, since the tape member 60 is disposed on the non-skin surface side of the back sheet 22 inside the outer edge of the absorbent article 10, body fluid such as menstrual blood does not adhere to the tape member 60. The user rolled the absorbent article 10 by attaching the outwardly extended tape member 60 to the adhesive part 70 provided on another part of the back sheet 22 after using the absorbent article 10. Can be maintained. Here, since no body fluid such as menstrual blood adheres to the tape member 60, it is possible to prevent a decrease in the bonding strength between the tape member 60 and the adhesive part 70, thereby making the absorbent article 10 into a small rolled state. It can be made easy to maintain.

  Furthermore, during use of the absorbent article 10, the tape member 60 is provided on the non-skin side of the back sheet 22 and does not extend outside the outer edge of the absorbent article 10, so the tape member 60 Does not hit your skin directly. Therefore, discomfort and discomfort during use can be reduced.

  The tape member 60 is a central portion of the absorbent article 10 in the width direction W within a range of 1/3 length of the length of the absorbent article 10 in the front-rear direction L from the rear edge E2 of the absorbent article 10 Is preferably provided. Thereby, the tape member 60 is arrange | positioned in the position corresponded to the crack (cleavage) of a wearer's buttocks. Thus, since the tape member 60 is arrange | positioned in the concave part of a wearer's skin, the discomfort of the wear resulting from the tape member 60 can be reduced.

  More preferably, the tape member 60 is provided in a range of 15% of the length of the absorbent article 10 in the front-rear direction L from the rear edge E2 of the absorbent article 10. Thereby, the tape member 60 is arrange | positioned in the position corresponded to the crack (cleavage) of a wearer's buttocks. Thus, since the tape member 60 is arrange | positioned in the concave part of a wearer's skin, the discomfort of the wear resulting from the tape member 60 can be reduced.

  It is preferable that the tape member 60 be configured to be able to extend rearward beyond the rear edge of the absorbent article 10. More preferably, the tape member 60 is provided on the rear side of the rearmost folding line F3 of the folding lines F1 to F3. About 80% of users start winding the used absorbent article 10 from the front side. By the tape member 60 being configured to be able to extend rearward beyond the rear edge of the absorbent article 10, many users extend the tape member 60 along the winding direction to The member 60 can be attached to the main body adhesive unit 70.

  Preferably, the main-body adhesive unit 70 is provided on an imaginary line extending the tape member 60 in the front-rear direction L. More preferably, the main unit adhesive portion 70 is provided on a virtual line extending the tape member 60 in the direction opposite to the extending direction. Thereby, when the tape member 60 is extended to the back side from the back side edge E2 of the absorbent article and the tape member 60 is made straight along the wound absorbent article 10, the main adhesive portion 70 is formed on the tape member 60. Adhere to. Therefore, the user can easily maintain the absorbent article 10 in the rolled state without pulling the tape member 60 obliquely to the position of the main body adhesive portion 70.

  It is preferable that the width W3 in the direction orthogonal to the extending direction of the main unit adhesive portion 70 provided on the imaginary line is larger than the width W1 in the direction orthogonal to the extending direction of the tape member 60. As a result, when the tape member 60 is stretched in the stretching direction with the absorbent article 10 wound, even if the tape member 60 is not straight but bent slightly and pulled out, the non-fixed portion 64 of the tape member 60 It is located at the main body adhesive unit 70. Therefore, the user can easily attach the tape member to the adhesive part.

  A plurality of main body adhesive units 70 may be provided at intervals in the width direction W. In this case, the width W1 of the tape member 60 in the width direction W is preferably larger than the interval W2 between the main adhesive portions 70 in the width direction W. Thereby, it can prevent that the main body adhesion part 70 does not exist in the tip where the user pulled out the tape member 60. Therefore, the user can easily attach the tape member 60 to the adhesive section 70.

  It is preferable that the surface of the tape member 60 in contact with the main adhesive portion 70 be smooth. For example, the surface roughness of the KES of the surface of the tape member 60 in the side to be in contact with the main adhesive portion 70 may be in the range of about 0.5 to 1.5. Since the surface of the tape member 60 in contact with the main adhesive portion 70 is smooth, the contact area of the tape member 60 with the main adhesive portion 70 can be increased. Thereby, when the tape member 60 is made to adhere to the main-body adhesive portion 70 in a state where the absorbent article 10 is rolled, it is possible to suppress the tape member 60 from being detached from the main-body adhesive portion 70.

  The surface roughness of KES can be measured, for example, using a surface test apparatus (KES-FB4-AUTO-A) manufactured by Kato Tech Co., Ltd. (Kato Tekko Co., LTD.). Specifically, first, the tape member (test piece) to be measured is placed on the measurement table of the surface test apparatus. Then, with the test piece fixed so that the test piece can not be wrinkled, the measurement terminal is moved in the measurement direction while bringing the measurement terminal of the surface test apparatus into contact with the test piece. The test piece may be cut into a size having a length of 100 mm in the measurement direction and a width of 50 mm in the direction orthogonal to the measurement direction. The surface roughness of the aforementioned KES is defined by the value of the roughness (SMD) obtained by this measurement.

  Both the back sheet 22 and the tape member 60 may be made of a film, for example, a synthetic resin film. Further, it is preferable that at least one, and preferably both of the surface of the tape member 60 in contact with the back sheet 22 and the surface of the back sheet 22 in contact with the tape member 60 have not been subjected to the antistatic treatment.

  Moreover, the tape member 60 may be comprised with the film which does not contain an antistatic agent. Thus, the tape member 60 is easily stuck to the main body by static electricity. By sticking the tape member 60 to the main body, it is possible to prevent the tape member 60 from being twisted while the absorbent article 10 is worn.

  Preferably, at least a portion of the fixing portion 62 of the tape member 60 overlaps the absorber 30 in the thickness direction. The area where the absorbent body 30 is present is an area of high rigidity in the absorbent article 10. Since the fixing portion 62 of the tape member 60 overlaps the absorber 30 in the thickness direction, when the absorbent article 10 is wound, the fixing portion 62 of the tape member 60 located in the region of high rigidity is the absorbent article 10. It curves with it firmly. As described above, when the fixing portion 62 of the tape member 60 is firmly curved, the free end of the tape member 60 is more easily lifted from the back sheet 22. Thus, the user can pinch and operate the tape member 60 more easily.

  The tensile strength of the back sheet 22 per width, which is the same as the width of the fixed portion 62 in the direction perpendicular to the drawing direction, is the tensile force necessary to expand the length of the non-fixed portion 64 of the tape member 60 by 1.5 times. Higher than power. As a result, even if the tape member 60 is pulled so as to extend the length of the non-fixed portion 64 of the tape member 60 by 1.5 times, the possibility of the back sheet 22 being broken is reduced, and the absorber which absorbed the body fluid Leakage of body fluid from 30 can be suppressed. Therefore, the absorbent article can be disposed of cleanly.

  The tensile strength of the back sheet 22 per width, which is the same as the width of the fixed portion 62 in the direction orthogonal to the drawing direction, is higher than the tensile force necessary for breaking by pulling the non-fixed portion 62 of the tape member 60 Is more preferred. Thereby, even if the tape member 60 is pulled strongly, the tape member 60 is broken before the back sheet 22 is broken. Therefore, leakage of the body fluid from the absorber 30 that has absorbed the body fluid can be further suppressed.

  Furthermore, when the length of the non-fixed portion 64 of the tape member 60 is expanded 1.5 times, preferably 3.0 times, the width of the non-fixed portion 64 of the tape member 60 is preferably 5 mm or more, more preferably 7 mm or more. Thereby, even if the non-fixed portion 64 of the tape member 60 is necked in by the extension of the non-fixed portion 64 of the tape member 60, the width of the non-fixed portion 64 of the tape member 60 can be secured. It is easy to fix by the tape member 60 in the state which rounded off 10.

  Here, the tensile strength required to stretch the back sheet 22 and the length of the non-fixed portion 64 of the tape member 60 by 1.5 times is, for example, a tensile tester manufactured by Instron (model number: 5543).

  First, a sample having a length of 40 mm and a width of 25 mm is cut out from the back sheet 22 and the tape member 60 of the absorbent article 10. Here, the length corresponds to the direction in which the tape member 60 is pulled, which is the length in the front-rear direction L in the illustrated embodiment. The width corresponds to the width in the direction orthogonal to the length, and in the illustrated embodiment, the length in the width direction W. Here, in the case of the back sheet 22, the sample is cut out so as to include a portion adjacent to the fixing portion 62 of the tape member 60.

  Next, both ends of the cut sample in the lengthwise direction are pinched by a pair of chucks of a tensile tester. Here, the chuck of the tensile tester sandwiches both ends in the lengthwise direction of the sample by 10 mm. That is, the distance between the pair of chucks is 20 mm. Here, regarding the tape member 60, it is noted that only the non-fixed portion 64 of the tape member 60 is positioned between the pair of chucks.

  Next, the distance between the pair of chucks of the tensile tester is increased at a speed of 1000 mm / min until the sample breaks. The tensile force applied to the chucks is measured when the sample length is 1.5 times, ie, when the distance between the chucks is 30 mm. This tensile force is the tensile force necessary to stretch the tape member 60 and the back sheet 22 by 1.5 times.

  Also, when the sample breaks, the tensile force applied to the chuck is measured. This tensile force is the breaking strength of the tape member 60 and the back sheet 22. In the present specification, the tensile strength of the back sheet 22 described above is defined by the breaking strength of the back sheet 22.

The bonding strength of the tape member 60 is 0.5 N when the non-fixed portion 64 of the tape member 60 is fixed to the wing adhesive portion 42, the flap adhesive portion 52 or the main body adhesive portion 70 with a force of 30 g / cm ^{2 in} the thickness direction. It is preferable that it is more than. As a result, peeling of the tape member 60 from the wing adhesion portion 42, the flap adhesion portion 52 or the main body adhesion portion 70 is suppressed, and the absorbent article 10 can be easily maintained in a rolled state.

The bonding strength of the tape member 60 when the non-fixed portion 64 of the tape member 60 is fixed to the wing adhesion portion 42, the flap adhesion portion 52 or the main body adhesion portion 70 with a force of 30 g / cm ^{2 in} the thickness direction is as follows Measured.

  First, the absorbent article is rolled in the front-rear direction, and the non-fixed portion 62 of the tape member 60 is fixed to the main adhesive portion 70. Under the present circumstances, it is made for the diameter (diameter when it sees from the width direction W) of the absorbent article rounded in substantially cylindrical shape to be about 40 mm. Next, a weight having a base size of 35 mm × 50 mm is placed on the absorbent article 10. The weight is placed at the portion where the tape member 60 and the main body adhesive portion 70 are fastened. Here, the weight of the weight is 525 g.

  Next, after placing a weight on the absorbent article for 1 minute, a sample including the tape member 60 is cut out from the absorbent article. Here, the sample includes the entire tape member 60, the portion of the back sheet 22 fixed to the fixing portion 62 of the tape member 60, and the portion of the back sheet 22 including the main adhesive portion 70 to which the tape member 60 is fixed. Including. Specifically, the sample is cut out so that the fixing portion of the tape member 60 is located at one end of the sample. Thereby, a sample in a state in which the two backsheets 22 are connected to each other by the tape member 60 is obtained. The width of the sample is 25 mm and the length of the sample is 70 mm. The length of the sample corresponds to the length in the stretching direction of the tape member 60.

  Next, with respect to the cut-out sample, the above-described tensile test of the tip of the non-fixed portion 64 of the tape member 60 and the end of the back sheet 22 of the sample (the end farther from the fixed portion 62 of the tape member) Insert it into the machine chuck. The distance between the pair of chucks is 20 mm.

Next, the distance between the pair of chucks of the tensile tester is increased at a speed of 1000 mm / min. This separates the two backsheets 22 that make up the sample. When the two backsheets 22 separate, the tension on the chuck is measured. The bonding strength of the tape member 60 when the non-fixed portion 64 of the tape member 60 is fixed to the adhesive portion with a force of 30 g / cm ^{2 in} the thickness direction is defined by the tensile force obtained by this measurement.

  The width of the fixing portion 62 in the direction orthogonal to the drawing direction is preferably shorter than the width W1 of the tape member 60 in the direction perpendicular to the drawing direction. Thus, when the non-fixed portion 64 of the tape member 60 is pulled, a strong force is applied in the stretching direction at the width of the fixed portion 62 which is shorter than the entire width of the tape member 60. Therefore, the tensile force required to stretch the non-fixed portion 62 of the tape member 60 can be reduced.

  The width of the fixing portion 62 in the direction orthogonal to the drawing direction is more preferably half or more of the width W1 of the tape member 60 in the direction perpendicular to the drawing direction. By increasing the width of the fixing portion 62 in the direction orthogonal to the drawing direction, it is possible to suppress the non-fixed portion 64 of the tape member 60 from being distorted in the width direction W. As a result, the non-fixed portion 64 of the tape member 60 can be easily maintained in a planarly spread state, and the absorbent article 10 can be easily fixed in a rolled-up state by the tape member 60.

  The non-fixed portion 64 of the tape member 60 may be provided at a position separated from the absorber 30. For example, the non-fixed portion 64 of the tape member 60 is preferably provided at a position separated by 50 mm or more from the absorber 30. When the absorbent body 30 absorbs a liquid such as the body fluid of the wearer, the back sheet 22 overlapping the absorbent body 30 in the thickness direction is twisted, and wrinkles are generated on the back sheet 22. Temporarily, if the tape member 60 exists in the place which such a wrinkles generate | occur | produce, a space will partially arise between the tape member 60 and the back surface sheet 22 by generation | occurrence | production of a wrinkle. As a result, the tape member 60 can not be in close contact with the back surface sheet 22, and the tape member 60 is easily rubbed against the back surface sheet 22 while the absorbent article 10 is worn. As a result, the tape member 60 curls or bends in the width direction, and the tape member 60 becomes difficult to use. In this embodiment, the non-fixed portion 64 of the tape member 60 is provided at a position away from the absorber 30 in the thickness direction, that is, at a position where wrinkles are less likely to occur in the back sheet 22 even if the absorber 30 absorbs liquid. Therefore, the tape member 60 can be prevented from curling or bending in the width direction during wearing.

  In the absorber 30, an emboss (compression part) of a predetermined pattern may be formed. In addition, the absorber 30 may have a low basis weight region having a basis weight lower than that of the surrounding absorbers 30. In this case, the tape member 60 preferably overlaps the low basis weight region provided in the emboss or absorber 30 formed in the absorber 30 in the thickness direction. When the tape member 60 overlaps in a thickness direction with a low-weighted area provided on the emboss or absorber 30 formed on the absorber 30, a gap between the tape member 60 and the back sheet 22 (absorber 30) It is easy to Therefore, when the absorbent article 10 is wound, the tape member 60 is more easily lifted from the back sheet 22, and the user can pinch and operate the tape member 60 more easily.

  It is preferable that the region excluding at least the fixing portion 62 of the tape member 60 is provided at a position not overlapping with the wing adhesive portion 42, the flap adhesive portion 52 and the main body adhesive portion 70. As a result, when the absorbent article 10 is wound, the tape member 60 is easily lifted from the back sheet 22. Therefore, the user can pinch and operate the tape member 60 more easily.

  The wing adhesive portion 42, the flap adhesive portion 52, and the main body adhesive portion 70 are within the movable range (region S in FIG. 2) of the non-fixed portion 64 without stretching of the non-fixed portion 64 in the unfolded state of the absorbent article 10. It is preferable that it also be provided outside. That is, the tape member 60 does not adhere to the wing adhesion part 42, the flap adhesion part 52, or the main body adhesion part 70 in a state where it is not stretched. Thereby, it can prevent that the tape member 60 adheres to the wing adhesion part 42, the flap adhesion part 52, and the main body adhesion part 70 while the absorbent article 10 is worn.

  Also, an emboss may be formed along the outer edge of the absorbent article 10. The emboss may be applied to, for example, the top sheet 20 and the back sheet 22. In this case, a part of the emboss may be formed on the tape member 60 as well.

  Although the present invention has been described above in detail using the above embodiments, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

10 Absorbent article 20 Front sheet 22 Back sheet 30 Absorber 40 Wing 42 Wing adhesion part 50 Hip flap 52 Flap adhesion part 60 Tape member 62 Fixing part 64 Non-fixing part 70 Body adhesion part S1 Discharge port facing area L Width direction W width direction

Claims (13)

Front to back,
A width direction orthogonal to the front and back direction;
A back sheet facing away from the wearer's skin,
And an aftertreatment tape member extensible in the drawing direction;
The tape member is
A fixing portion fixed to the back sheet;
A non-fixed portion not fixed to the back sheet;
Have
The tensile strength of the back sheet per width equal to the width of the fixing portion in the direction orthogonal to the drawing direction is necessary to expand the length of the non-fixed portion of the tape member by 1.5 times Absorbent articles higher than tensile strength.   The tensile strength of the back sheet per width equal to the width of the fixed portion in the direction orthogonal to the drawing direction is higher than the tensile force necessary for breaking by pulling the non-fixed portion of the tape member. The absorbent article according to claim 1.   The absorbent article according to claim 1, wherein a surface of the non-fixed portion of the tape member does not have an adhesive.   The width of the non-fixed portion of the tape member is 5 mm or more when the length of the non-fixed portion of the tape member is extended by 1.5 times. Absorbent articles.   The absorptive article according to any one of claims 1 to 4 whose width of said fixed part in the direction orthogonal to said extension direction is shorter than the width of said tape member in the direction orthogonal to said extension direction.   The absorbent article according to any one of claims 1 to 5, wherein a width of the fixing portion in a direction orthogonal to the drawing direction is a half or more of a width of the tape member in a direction perpendicular to the drawing direction. . It has an absorber on the skin surface side of the back sheet,
The absorbent article according to any one of claims 1 to 6, wherein the non-fixed portion of the tape member is provided at a position separated from the absorber in the thickness direction.   The absorptive article according to any one of claims 1 to 7 which has an adhesion part provided in the non-skin side of said back sheet.   The absorbent article according to claim 8, wherein the adhesive portion is provided on a virtual line extending the tape member in a direction opposite to the stretching direction.   10. The absorbency according to claim 8, wherein a width of the adhesive portion provided on the imaginary line in a direction orthogonal to the extending direction is larger than a width in a direction orthogonal to the extending direction of the tape member. Goods.   The absorbent article according to any one of claims 8 to 10, wherein the surface of the tape member in contact with the adhesive portion is smooth. The bonding strength of the tape member when the non-fixed portion of the tape member is fixed to the adhesive portion with a force of 30 g / cm ^{2 in} the thickness direction is 0.5 N or more. An absorbent article according to any one of the preceding claims.   The adhesive part is provided outside the movable range of the non-fixed part which does not accompany the extension of the non-fixed part in the unfolded state of the absorbent article, any one of claims 8 to 12. The absorbent article as described in.

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