JP6381349B2 - Disposable pants-type diapers and methods for determining ease of wearing them - Google Patents

Description

  The present invention relates to a disposable pant-type diaper suitable for use as an adult and a method for determining whether or not the diaper is easy to wear.

  2. Description of the Related Art Conventionally, adult disposable diapers that have been improved so as to be easily worn are known.

  For example, the disposable wearing article described in Japanese Patent Application Laid-Open No. 2012-192165 (Patent Document 1) has been improved so that it is easy to widen the waist opening to a required size even for elderly people with weak arm strength. Yes.

  Japanese Patent Laying-Open No. 2003-64575 (Patent Document 2) describes a method for measuring detachability of clothes and the like. In this method, an electromyogram of skeletal muscles generated when clothes are attached / detached is measured, and it is determined that the clothes are difficult to attach / detach if the myoelectric generation time is long.

JP2012-192165A JP 2003-64575 A

  In a disposable pants-type diaper for adults, when the waistline opening is greatly widened with both hands in order to wear it, a portion below the periphery of the waistline opening rises at the center in the width direction of the diaper. The waistline portion may be partially folded. When such a situation occurs in the rear waist area, when the diaper is pulled up, the folded portion is caught in the groin of the diaper wearer, and the movement of the diaper is temporarily slowed or stopped. The diaper cannot be raised smoothly.

  A diaper that can be in such a state cannot be said to be easy to wear, but it is difficult to know whether or not the diaper is such by measuring an electromyogram of the skeletal muscle.

  An object of the present invention is to provide a disposable pant-type diaper improved so as to be easily worn and to provide a method for determining whether or not it is easy to wear.

  In the present invention, the term “pants-type diaper” means that the diaper has a waistline opening and a leghole opening, and grips and wears the periphery of the waistline opening. Such diapers include those with and without a covering portion for the wearer's thigh.

  The present invention for solving the above problems includes a first invention relating to a disposable pants-type diaper for adults, and a second invention relating to a method for determining whether or not the diaper is easy to wear. It is constituted by.

The first invention of the present invention has a vertical direction and a lateral direction, and a front waistline region, a rear waistline region, and a crotch region are formed, and inner surfaces of both side edges of the front waistline region, The inner surfaces of both side edges of the rear waist region are joined to form side joint regions extending in the vertical direction on both sides of the lateral direction, and a waist opening and a pair of leg openings are formed. It has been, in the respective front post waist region is a disposable pants-type diaper for adults elastic member plural rows are attached in a stretched state between the side bonding region with each other.

The features of the first invention are as follows. In the diaper, the rear waistline region includes an upper elastic region formed by a plurality of strips of the elastic member having a width of at least 40 mm from the edge of the waistline opening downward in the vertical direction, and the upper elastic region A lower elastic region formed by a plurality of strips of the elastic member that are adjacent to each other and have a width in the downward direction of at least 40 mm,
The expansion ratio of the elastic member in the upper elastic region and the expansion force at the time of 1.7 times expansion per 15 mm width are 1. Less than the extension force at the time of 7 times extension,
A thigh of both legs and buttocks, a adult human dummy to the Shirimizo point and anal groove in the hip and buttocks after突点is formed, the anthropomorphic, among the Shirimizo An airpack wearing pressure sensor is attached to the groin point, which is a portion located immediately below the buttock rear projection point, and each of the thighs of the both legs is inserted through a pair of leg opening. The human body dummy while grasping the top of each side part of the diaper waist with one hand and pulling up the diaper at a constant speed so as to pass between the groin point and the buttock rear impact point in a predetermined time. When the wearing pressure in the process of wearing is measured, the maximum value of the wearing pressure measured at the groin point is between 0.5 and 1.5N.

The second invention is the subject of the present invention, and a thigh and buttocks legs, claim 1 wherein the buttocks adult anthropomorphic being formed with Shirimizo the hip after突点by wearing a diaper according to a method of determining wear ease of the diaper.

The features of the second invention are as follows. The human body dummy and the diaper have a vertical direction and a lateral direction, and the human body dummy includes a groin point and a rear part of the groin, which are portions of the groin that are located immediately below the buttock rear protrusion point. A wearing pressure sensor of an air pack is attached to at least the groin point of the projecting point, and the wearing pressure detected by the sensor is displayed by a pressure measuring device, and each of the thighs of the both legs is a pair of legs. both side portions respectively of the top of the waist of the said diaper that is inserted into the opening respectively held by each hand, the diaper between from the gluteal groove points to the hip after突点to pass at a given time the measure the wearing pressure while pulling up at a constant speed, the maximum value of the wearer pressure in the gluteal groove points arising in the course of pulling the diaper, between the plurality of the diapers were worn by the anthropomorphic Serial compares the maximum value, it is determined that those easily worn about the maximum value is smaller.

  According to the first aspect of the present invention, the wide upper elastic region formed in the rear waist region of the diaper is easy to extend in the lateral direction and is worn when the human body and the human body dummy are worn. The pressure is low and the diaper can be worn smoothly.

  According to the second aspect of the present invention, it is possible to easily determine whether or not the diaper is easy to wear based on the wearing pressure detected by the wearing pressure sensor attached to the human body dummy.

The drawings illustrate certain embodiments of the invention according to the present disclosure and include selective and preferred embodiments as well as essential configurations of the invention.
The perspective view of a disposable underpants type diaper. The diaper in a state where the side joint area of the diaper of FIG. 1 is unfolded and extended. FIG. 3 is an exploded view of the diaper of FIG. 2. The enlarged view of the front waist area in FIG. The enlarged view of the back waist area in FIG. The perspective view of a human body dummy. The rear view of the human body dummy before making a diaper wear. The rear view of the human body dummy before making a diaper wear. Rear view of human dummy in the process of wearing diapers The figure which shows the holding | grip method of a diaper. The figure which shows the holding | grip method of a diaper. The rear view of the human body dummy in the process of wearing the conventional diaper. The figure which shows the measurement result of wearing pressure.

  The details of the disposable pant-type diaper according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view of an adult diaper 10 which is an example of a disposable pants-type diaper. The diaper 10 has a front waistline region 11, a rear waistline region 12, and a crotch region 13. Each of the front waistline region 11 and the rear waistline region 12 has a pair of side edge portions 16 and a pair of side edge portions 17, and the side edge portions 16, 17 are welded with their inner surfaces facing each other. A pair of side joint areas 18 are formed. In the diaper 10, a waistline opening 21 is defined by the front waistline region 11 and the back waistline region 12, and a pair of leg periphery openings 22 is defined by the front waistline region 11, the back waistline region 12, and the crotch region 13. . A large number of gathers 23 and 24 are formed in the front waistline region 11 and the rear waistline region 12 by contraction of elastic members 38 and 39 described later. In the figure, the vertical direction and the horizontal direction of the diaper 10 are indicated by double-headed arrows Y and X.

  FIG. 2 shows an extended diaper obtained when the front waistline region 11 and the back waistline region 12 are unbonded and the diaper 10 is extended in a planar shape in each of the pair of side joint regions 18 in the diaper 10 of FIG. It is a partially broken top view of 10a. A double-headed arrow Y in FIG. 2 indicates a direction corresponding to the vertical direction Y in FIG. 1, and is also referred to as the vertical direction in FIG. The extended diaper 10a is formed in an hourglass shape and is attached to the inner surface of the outer member 31 via an adhesive such as a hot melt adhesive. And a rectangular inner member 32 extending from the crotch region 13 toward the front and rear waist regions 11 and 12. The front waistline region 11 has side edges 16 on both sides in the lateral direction X, and a front end edge 20a that forms a part of the periphery 20 (see FIG. 1) of the waistline opening 21 between the side edges 16. . The rear waistline region 12 has side edge portions 17 on both sides in the lateral direction X, and a rear end edge 20 b that forms a part of the peripheral edge 20 of the waistline opening 21 between the side edge portions 17. In the present invention, when referring to an adhesive, the type of adhesive is not specified. However, the hot melt adhesive is an example of a particularly preferable adhesive.

  FIG. 3 is an exploded view of the extended diaper 10a of FIG.

  As is apparent from FIGS. 2 and 3, the outer member 31 has a base sheet 35 having an inner surface 33 and an outer surface 34 and formed in an hourglass shape, and a hot melt adhesive or the like on the outer surface 34 of the base sheet 35. The front exterior sheet 36 that forms the front waistline region 11 together with the base sheet 35 and the outer surface 34 are joined via an adhesive (not shown). And a rear exterior sheet 37 that forms the rear waistline region 12 together with the base sheet 35. Between the base sheet 35 and the front exterior sheet 36, a plurality of front waistline elastic members 38 extending straightly between the side edges 16 are interposed, and an adhesive (not shown) is attached to at least one of the sheets 35, 36. ) In a stretched state. Further, between the base sheet 35 and the rear exterior sheet 37, a plurality of rear waistline elastic members 39 extending straightly between the side edge portions 17 and projecting toward the front exterior sheet 36. A plurality of leg-surrounding elastic members 40 extending in a curved line and extending at least partially are interposed, and joined to at least one of the sheets 35 and 37 via an adhesive (not shown). Yes. The front exterior sheet 36 and the rear exterior sheet 37 are formed with a front crotch part 41 and a rear crotch part 42 that are joined to the crotch region 13 of the base sheet 35 via an adhesive (not shown). Also, the front exterior sheet 36 and the rear exterior sheet 37 are joined to the base sheet 35 after being joined to the base sheet 35, and then folded back toward the inner surface 33 of the base sheet 35 via an adhesive (not shown). A front folding margin 43 and a rear folding margin 44 to be joined are formed.

  As is apparent from FIG. 3, the inner member 32 is formed by covering a body fluid-absorbing core member 46 with a liquid-permeable inner surface sheet 47 and a liquid-impermeable outer surface sheet 48. It is. The core material 46 is an aggregate of water-absorbing materials such as pulverized pulp, and extends from the crotch region 13 toward the front waistline region 11 and the rear waistline region 12. The inner sheet 47 is formed of a liquid-permeable nonwoven fabric or a liquid-permeable plastic film, and the outer sheet 48 is formed of a liquid-impervious plastic film or a laminate of a liquid-impervious plastic film and a nonwoven fabric. The inner surface sheet 47 and the outer surface sheet 48 overlap each other at portions extending from the front end 46a and the rear end 46b of the core member 46, and are joined via an adhesive (not shown) to thereby form the inner member 32. The front end portion 51 and the rear end portion 52 are formed. The inner sheet 47 and the outer sheet 48 overlap each other at portions extending from both sides of the core member 46, and are joined via an adhesive (not shown), so that a pair of leakage preventions commonly used in the art. A wall 53 is formed. The leak-proof wall 53 includes an elastic member 54 in an extended state so that the diaper 10 can be raised toward the skin of a diaper wearer (not shown) when the diaper 10 is worn. In the inner member 32 thus formed, the front end portion 51 and the rear end portion 52 are joined to the front portion 61 and the rear portion 62 on the inner surface 33 of the base sheet 35 via an adhesive, and the front end portion The intermediate part between 51 and the rear-end part 52 is joined to the intermediate part 63 located in the crotch region 13 of the base sheet 35 via an adhesive. After the outer member 31 and the inner member 32 are joined, the folding margin 43 of the front exterior sheet 36 and the folding margin 44 of the rear exterior sheet 37 are folded toward the inner surface 33 of the base sheet 35, and an adhesive (FIG. The inner surface 33 and the front end 51 and the rear end 52 of the inner member 32 are joined to each other (see FIG. 2). The elastic member 54 of the inner member 32 acts as a leg-hole elastic member in the diaper 10 in cooperation with the auxiliary elastic member 40 in the outer member 31.

  In FIG. 2, the rear end edge 20b of the diaper 10a and the rear end 46b of the core member 46 are separated by at least 70 mm. In the diaper 10 for adults, particularly when the diaper 10 is scheduled to be used as a urine absorbing pad, the core 46 is made longer and the rear end 46b is made closer to the rear end edge 20b. Is usually not preferred. The long core member 46 in which the separation distance between the rear end 46b and the rear end edge 20b is less than 70 mm may not only waste water capacity but waste the body fluid-absorbing material. The region 12 becomes bulky, which also causes the feeling of wearing the diaper 10 to deteriorate.

  However, in the disposable diaper for infants, the distance between the rear end of the core and the rear end edge of the diaper is about 50 mm at most, and 20-30 mm of the dimension is occupied by the elastic member in the waist region. Often it is. In a baby diaper having a small overall shape, when the absorption capacity of the core material is to be increased, the rear end of the core material is often extended close to the rear edge of the diaper.

In the extended diaper 10a of FIG. 2, the inner dimension between the side joining areas 18 at the front end edge 20a and the rear end edge 20b is W ₀ , and the dimension between the front end edge 20a and the rear end edge 20b is L. ₀ . The dimensions of the vertical direction Y of the rear waist region 12, respectively the front waist region 11 is _{L 1} and _{L 2.} When the diaper 10 for adults of FIG. 1 is M size which is a standard size or M size which also serves as L size, the dimension W ₀ is 400 to 800 mm, and the front and rear waist elastic members 38 and 39 are used. When is contracted, it is preferably 300 mm or less. Dimension _{L 0} is a 650-850Mm, it is preferred dimensions _L 1, _{L 2} is 150-200Mm. Incidentally, such a shoe 10 is suitable for a wearer whose waistline dimension is 600-950 mm.

4 is an enlarged view of the front waistline region 11 in FIG. 2, and the double-headed arrow Y indicates the vertical direction in FIG. 1. In front waist region 11, a first front waist elastic region 61f and the upper and lower from the lower direction Y adjacent to the first front waist elastic region 61f dimensions M ₂ having dimensions M ₁ in the vertical direction Y includes a front end edge 20a A second front waistline elastic region 62f is formed. The first front waistline elastic region 61f is an upper elastic region in the front waistline region 11, and the second front waistline elastic region 62f is a lower elastic region. First front waist elastic region 61f, the dimensions _{M 1} is in the range of 40-80Mm, among the front waistline elastic member 38, the center spacing of the plural rows in which are arranged so as to 3-15mm A first front waistline elastic member 38a is included. The first front waistline elastic member 38a also has a fineness in the range of 400-800 dtex and an expansion ratio in the range of 1.8-2.5 times. Second front waist elastic region 62f is a dimension _{M 2} is in the range of 40-90Mm, center distance among the front waistline elastic member 38 is plural rows in which are arranged so as to 5-15mm 2 The front waistline elastic member 38b is included. The second front waistline elastic member 38b also has a fineness in the range of 500-1000 dtex and an expansion ratio in the range of 2.0-3.0 times. However, the second front waistline elastic member 38b has an expansion ratio larger than that of the first front waistline elastic member 38a, and the expansion ratio is large. It is distinguished from the first front waistline elastic region 61f. The fineness of the second front waistline elastic member 38b is equal to or greater than the fineness of the first front waistline elastic member 38a.

FIG. 5 is an enlarged view of the rear waistline region 12 in FIG. 2, and the double-headed arrow Y indicates the vertical direction in FIG. In the rear waist region 12, a first rear waist elastic region 61r having dimensions N ₁ in the vertical direction Y includes a rear edge 20b, the dimension from the lower side of the vertical direction Y adjacent to the first rear waist elastic region 61r N ₂ , a second rear waistline elastic region 62 r is formed. The first rear waistline elastic region 61 r is an upper elastic region in the rear waistline region 12, and the second rear waistline elastic region 62 r is a lower elastic region in the rear waistline region 12. First rear waist elastic region 61r is the size _{N 1} is in the range of 40-70Mm, center distance among the rear waistline elastic member 39 is plural rows in which are arranged so as to 3-10mm 1 The back waistline elastic member 39a is included. The first rear waistline elastic member 39a also has a fineness in the range of 400-800 dtex and an expansion ratio in the range of 1.8-2.5 times. Second rear waist elastic region 62r is the dimension _{N 2} is in the range of 40-80Mm, center distance among the rear waistline elastic member 39 is plural rows in which are arranged so as to 5-15mm 2 The back waistline elastic member 39b is included. The second rear waistline elastic member 39b also has a fineness in the range of 500-1000 dtex and an expansion ratio in the range of 2.0-3.0 times. The second rear waistline elastic member 39b has an expansion ratio larger than that of the first rear waistline elastic member 39a, and the expansion ratio is large, so that the second rear waistline elastic region 62r is different from the first rear waistline elastic region 61r. Differentiated. The fineness of the second rear waistline elastic member 39b is equal to or greater than the fineness of the first rear waistline elastic member 39a.

  At least the rear waistline region 12 of the front waistline region 11 and the rear waistline region 12 formed in this way has an extension force in the lateral direction X of the first rear waistline elastic region 61r so that the second rear waistline elastic region 62r. The first rear waistline elastic member 39a and the second rear waistline elastic member 39b are used so as to be lower than the extension force in the lateral direction X. Between the first rear waistline elastic member 39a and the second rear waistline elastic member 39b used in such a manner, it is possible to make a difference in any of fineness, expansion ratio, center distance between elastic members, and elastic material. .

The extension forces of the first front waistline elastic region 61f, the second front waistline elastic region 62f, the first back waistline elastic region 61r, and the second back waistline elastic region 62r are measured as follows. (1) The diaper 10 is placed in a natural state, and the elastic member of the diaper 10 is contracted. (2) In the elastic region where the extension force is to be measured, a test piece (not shown) having a width of 15 mm in the vertical direction Y of FIG. 2 and a length of about 60 mm in the horizontal direction X is shown in FIG. Cut out from between the side joining area 18 and the inner member 32. However, a part of the test piece may intersect with the inner member 32. (3) Two mark lines are written in the central portion of the test piece in the length direction so that the distance in the length direction is about 30 mm, and the dimension E ₀ between the mark lines is accurately measured. (4) A test piece is attached to a tensile tester. In the tensile testing machine, both end portions of the test piece are each gripped by 10 mm. For example, Instron model NO. 5564 can be used. (5) The test piece is pulled at a speed of 100 mm / min, the elongation force is obtained when the dimension E ₀ reaches 1.7 times, and the value is taken as the elongation force in the elastic region. (6) When cutting out a test piece having a width of 15 mm from the elastic region, the sampling position of the test piece in the elastic region is selected so that as many elastic members as possible are included in the width direction of the test piece.

  The elongation force is measured in the same manner for elastic regions of diapers other than the diaper 10, for example, the diapers of conventional examples.

Also, the first front waistline elastic member 38a, the second front waistline in the first front waistline elastic region 61f, the second front waistline elastic region 62f, the first back waistline elastic region 61r, and the second back waistline elastic region 62r. The expansion ratio of each of the surrounding elastic member 38b, the first rear waistline elastic member 39a, and the second rear waistline elastic member 39b is measured as follows. (1) Make the same test piece as the test piece for measuring the extension force, and extend the test piece in the lateral direction X until the gather 23 or 24 (see FIG. 1) disappears. Two marked lines are written on the elastic member of the extended test piece so that the separation dimension is 30 to 50 mm, and the dimension F ₀ between the marked lines is accurately measured. (3) The test piece is immersed in a toluene solution to dissolve the adhesive, and the elastic member is separated from the test piece. (4) an elastic member that is separated is deflated and accurately measuring the dimensions F ₁ between the marked lines. (5) to determine the specific dimensions _{F 0} for dimension _{F 1 (F 0 / F 1} ), it is the ratio and elongation ratio of the elastic member.

A specific example for obtaining the rear waistline region 12 with reference to FIG. 5 is as follows. For the base sheet 35 and the rear exterior sheet 37, an SMS nonwoven fabric having a mass per unit area of 25 g / m ² is used. The size _{W 0} and dimensions _{L 2,} is set to the 560mm and 170mm. The upper portion of the first rear waist elastic region 61r having dimensions _{N 1,} mounting the first rear waist elastic member 39a of the five is obtained by extending Lycra 620dtex (registered trademark) 2.3-fold . Four first rear waistline elastic members 39a, which are 780 dtex lycra stretched 2.1 times, are attached to the lower part of the first rear waistline elastic region 61r. In the first rear waistline elastic region 61r, these nine lycra are attached so that the center distance is the same. In the second post-waist elastic region 62r of adjacent dimension _{N 2} have the 60mm from below the first rear waist elastic region 61r, the second rear waist elastic member 39b is obtained by extending the 2.5 times the Lycra 780dtex 6 are used. The six second rear waistline elastic members 39b are attached so that all the center intervals have the same dimensions except that the center interval between the two uppermost two members is 6 mm. In the figure, the boundary line between the first rear waistline elastic region 61r and the second rear waistline elastic region 62r is the center of the first rear waistline elastic member 39a and the second rear waistline elastic member 39b adjacent in the vertical direction Y. Thus, the elastic member 39a and the elastic member 39b are separated so that the center distance is 8 mm.

When the rear waistline region 12 is formed in this way, an example of the front waistline region 11 in FIG. 4 can be formed as follows. An SMS nonwoven fabric having a mass per unit area of 25 g / m ² is used for the front exterior sheet 36. Dimension _{L 1} is set to 170mm. First first rear waist elastic members of the first front waistline elastic member 38a of the five is obtained by extending the 2.3 times the Lycra 620dtex the upper part of the front waist elastic region 61f dimension _{M 1} is 65mm Similarly to 39a, the elastic members 38a are attached so that the center distance is the same. In the lower part of the first front waistline elastic region 61f, the four first front waistline elastic members 38a, which are 780 dtex lycra stretched 2.1 times, have the same center distance between the elastic members 38a. Attach to. However, the 620 dtex lycra and the 780 dtex lycra which are adjacent in the vertical direction Y are separated so that the center distance is 14 mm. Dimensions _{M 2} is 75mm The second front waist elastic region 62f, the distance between the centers of the second front waistline elastic member 38b of eight is obtained by extending the 2.5 times the Lycra 780dtex and how the elastic member 38b The second front waistline elastic member 38b is attached to the lowermost part of the second front waistline elastic region 62f so that the center distance is about 6 mm.

The adult diaper 10 formed in this way can be used for the top of both sides of the diaper 10 even when the diaper wearer wears himself or when the caregiver tries to wear it. It is customary to hold the diaper 10 in the lateral direction X and insert both legs into the leg opening 22 and then pull up so that the waist opening 21 passes through the buttocks. At that time, the waist region 12 of the diaper 10 has at least 40mm dimension N ₁ of the vertical direction Y subject to the first rear waist elastic region 61r is as a width when gripping the diaper 10, transversely Since the belt-like elastic region that is easy to extend to X is formed, the wide elastic region can be uniformly extended in the lateral direction X, and the waistline opening 21 can be enlarged. When the waist opening 21 passes through the flange groove 104 and the flange rear impact point 105 in the collar portion 110 described later, the rear end edge 20b of the rear waist region 12 and the portion following the rear edge, that is, the first rear waist elastic region 61r is the collar portion. Therefore, when the diaper 10 is pulled up, the rear end edge 20b is not in pressure contact with the buttocks to prevent the diaper 10 from being smoothly pulled up.

  In addition, as for the diaper 10, the 2nd front waistline elastic region 62f and the 2nd back waistline elastic region 62r have high extension | strengthening force so that it may not slide down after wearing it. Incidentally, in many conventional disposable pants-type diapers for adults, a waist elastic region is formed along the periphery of the waistline opening. The width, which is the vertical dimension of the waist elastic region, is about 20-30 mm, and an auxiliary elastic region for making the waist of the diaper fit weakly to the wearer is formed below the waist elastic region. . The expansion ratio of the elastic member in the waist elastic region is higher than the expansion magnification of the elastic member in the auxiliary elastic region. Moreover, the center space | interval of adjacent elastic members is smaller than that of the elastic member in an auxiliary | assistant elastic region. As a result of this, the stretching force in the lateral direction of the waist elastic region is higher than that of the auxiliary elastic region. In such a diaper, holding both sides of the waist elastic region with both hands and pulling it laterally so as to enlarge the waistline opening, the entire waist elastic region expands, but the waist elastic region The auxiliary elastic region adjacent to the waist cannot follow the extension, for example, the auxiliary elastic region rises in the central portion in the lateral direction of the rear waistline region and overlaps the waist elastic region from the outside of the diaper. The central part may be bent. When the diaper is pulled up, the waist elastic region in such a state is in contact with the buttocks from below and the auxiliary elastic region is in close contact with the waist elastic region (see FIG. 12 below), and the upper region of the diaper in the rear waistline region. You can't pass through the buttocks without temporarily stopping the movement and strengthening the pulling force. However, in diapers for infants where the core material in the absorbent body is close to the waist elastic region, the auxiliary elastic region is bent and the core material prevents it from rising, so it is rare for this to occur. is there.

  FIG. 6-10 is a diagram showing a series of steps in a method for observing and determining whether or not a diaper 150 of a postscript comparative example, which is an example of a diaper 10 and a conventional diaper, is easy to wear. ).

  FIG. 6 is a perspective view of a human body dummy 100 prepared for wearing adult pants-type diapers of M size and M and L combined sizes. The human body dummy 100 shows the average human body shape of a 70's Japanese woman (Nanasai Human Body Dummy WD-70A), but instead of this human body dummy 100, the average human body of a 40's Japanese woman. A shape (Nanasai Human Body Dummy WD-40A) showing a shape can also be used. Moreover, the thing equivalent to these human body dummies can also be used. In the human body dummy 100, required marked lines 101a and 101b are written in the vertical direction and the horizontal direction. The human body dummy 100 also has an abdominal abutment 102.

  7 and 8 are views showing the back surface of the human body dummy 100. FIG. The human body dummy 100 includes a thigh 103 of both legs, a heel part 110, a heel groove 104, a buttock rear protrusion 105, and a groin point 106 which is a point on the groin 104 just below the buttock rear protrusion 105. Have. Wear pressure sensors 107a (see FIG. 8) and 107b (see FIG. 7) are attached to the buttocks rear protrusion 105 and the groin groove point 106. As the wearing pressure sensors 107a and 107b, standard air pack sensors (diameter 20 mm) manufactured by AIM Techno Co., Ltd. are used. The wearing pressure sensors 107a and 107b are connected to a pressure measuring device (not shown), and the pressure measuring device displays the pressure detected by the wearing pressure sensors 107a and 107b at predetermined time intervals, for example, at intervals of 0.1 seconds. Can be recorded.

  FIG. 9 shows that when the diaper 10 is pulled up, the vicinity of the waistline opening 21 of the diaper 10, specifically, when the first rear waistline elastic region 61 r passes through the wearing pressure sensor 107 a attached to the buttocks rear protrusion 105. Indicates the state. In the diaper 10, the first rear waistline elastic region 61 r and the second rear waistline elastic region 62 r extend in the lateral direction of the buttocks following the bulge of the buttocks 110 of the human body dummy 100. The diaper 10 is provided with a center line (see FIG. 2) that bisects the dimension in the horizontal direction X, and is aligned with the center marked line that is entered on the human body dummy 100 so that the human body dummy 100 and the diaper are aligned. It is preferable to pull up the diaper 10 while keeping the positional relationship with 10 always constant.

  10 and 11 show how to hold the side part of the diaper 10 when the diaper 10 through which the thigh 103 is inserted is pulled up. The diaper 10 is gripped when the first rear waistline elastic region 61r is at a lower position that is at least 100 mm away from the groin point 106. An operator who pulls up the diaper 10 stands on the back side of the human body dummy 100 and grips the left side of the diaper 10 with the left hand 111 and grips the right side of the diaper 10 with the right hand (not shown). Each of the left hand and the right hand has a forefinger positioned in front of the side joint area 18 and along the side joint area 18 (see FIG. 10), and a thumb is positioned behind the side joint area 18 and side joint Along the zone 18 (see FIG. 11), the forefinger and thumb straddle the top of the side junction zone 18. The tip of the index finger reaches the portion of the diaper 10 that is 30-40 mm below the front edge 20a of the front waistline region 11 so that the tip of the thumb does not exceed the tip of the index finger. That is, the thumb does not exceed the first rear waistline elastic region 61r.

  The diaper 10 is pulled up at a speed of 60 mm / sec. When the diaper 10 reaches a point 100 mm above the buttocks rear protrusion 105, the pulling is stopped, and the observation of the diaper 10 is ended.

  FIG. 12 is a view showing a state in which a human body dummy 100 is worn with a diaper 150 of a comparative example, which is one of conventional disposable pants-type diapers for adults compared with the diaper 10. The diaper 150 of the comparative example is an M size, but has a waist elastic region 151 having a width of 30 mm formed along the waist opening, and the rear waist region has a width adjacent to the waist elastic region 151 from below. It has an auxiliary elastic area 152 of 75 mm. In addition, the width | variety here is a dimension in the up-down direction of the diaper 150 of a comparative example. Five elastic lycra members having 780 dtex as elastic members are attached to the waist elastic region 151 in a state of being stretched 2.5 times, and the elastic members are separated so that the center interval is 5 mm. Ten lycra having 620 dtex are attached to the auxiliary elastic region 152 in a state where the lycra is extended 2.1 times, and the elastic members are separated so that the center interval is 10 mm. In the diaper 150 of the comparative example, the extension force of the waist elastic region 151 per 15 mm width has a higher value than the extension force of the auxiliary elastic region 152 per 15 mm width. The diaper 150 of this comparative example, in which the thigh 103 of the human body dummy 100 is inserted, grips the tops of both sides of the waist elastic region 151 and pulls it in the lateral direction. In the portion 156, the auxiliary elastic region 152 rises so as to be folded over the waist elastic region 151 as shown. When the diaper 150 of the comparative example in this state is pulled up, the waist elastic region 151 and the auxiliary elastic region 152 overlapping with the waist elastic region 151 are in close contact with the bulge of the buttock in the heel groove 104 from below, and both side portions of the diaper 150 are upward Even when moving toward the center portion 156, the central portion 156 remains in the ridge groove 104. Thereafter, when the pulling force is strongly applied to the central portion 156, the central portion 156 can pass over the ridge groove 104 and is further lifted upward. Therefore, when the diaper is in the state shown in FIG. 12, the diaper cannot be quickly pulled up at a uniform speed.

  FIG. 13 is a record of the wearing pressure at the groin point 106 obtained by causing the human body dummy 100 to wear the diaper 10 of the example and the diaper 150 of the comparative example. The horizontal axis in the figure represents the elapsed time (seconds) from the start of lifting, and the vertical axis represents the wearing pressure (N). One scale on the horizontal axis is 0.1 second. In the figure, the difference in peak height (difference in wearing pressure) indicates whether or not a folding overlap as illustrated in FIG. 12 is formed in the rear waistline region of the worn diaper. In the diaper 10 that is gripped as illustrated in FIG. 10 and pulled up through the state illustrated in FIG. 9, the first rear waistline elastic region 61r and the second rear waistline elastic region 62r have the ridge groove 104 and the buttock rear protrusion 105. Therefore, the wearing pressure sensator 107b at the groin point 106 does not show a high value. On the other hand, in the diaper 150 of the comparative example, the waist elastic region 151 and the auxiliary elastic region 152 are in the state illustrated in FIG. 12 in the grooving groove 104 and are in pressure contact with the wearing pressure sensor 107b at the grooving point 106. If it is not pulled strongly, it cannot pass through the groove 104. Therefore, the wearing pressure sensor 107b shows a high wearing pressure as shown in the figure until the waist elastic region 151 passes through the ridge groove 104.

  When the wearing pressure is measured and recorded in this manner, the diaper 10 according to the present invention preferably has a wearing pressure peak in the range of 0.5-1.5N, 0.5-1. More preferably, it is in the range of 0N. Such a diaper 10 can be judged to be easy to wear for both a wearer who wants to wear the diaper 10 and a caregiver who wants to wear the diaper 10. On the other hand, the diaper 150 of the comparative example has to pass through the state shown in FIG. 12 after the waist elastic region 151 reaches the grooving point 106 and passes through the grooving point 106, so that the wearing pressure peak Is remarkably high and becomes 2.5N or more. It can be judged that the diaper 150 of such a comparative example is not easy to wear compared to the diaper 10.

  Thus, if a wearing pressure is measured using the human body dummy 100, it can be judged that a diaper is easy to wear, so that the maximum value of a wearing pressure is low.

  The diaper according to the present invention does not have the inner member 32 in addition to the illustrated example, and the core member 46 is interposed between the liquid-impermeable base sheet and the liquid-permeable sheet to be bonded to the inner surface thereof. It can also be implemented as a pants-type diaper, or as a pants-type diaper in which a waste disposal pad, for example, a urine collection pad, which is made separately from the diaper, can be attached and detached. Moreover, the method of this invention which judges the ease of wearing using the human body dummy 100 can be widely used also with pants type wearing articles other than a disposable pants type diaper.

  The first invention of the present invention described so far can be summarized as follows at least.

A front waistline region, a rear waistline region, and a crotch region are formed, and an inner surface of each side edge of the front waistline region and an inner surface of each side edge of the rear waistline region. together with the side bonding region extending vertically on each sides of the laterally junction is formed, be formed and a waist opening and a pair of leg openings, the side on respective front post waistline region A disposable pants-type diaper for adults in which a plurality of elastic members are attached in an extended state between the joint areas,
The rear waistline region includes an upper elastic region formed by a plurality of strips of the elastic member having a width from the edge of the waistline opening toward the lower side in the up and down direction, and adjacent to the upper elastic region. A lower elastic region formed by a plurality of strips of the elastic member having a downward width in a range of at least 40 mm,
The expansion ratio of the elastic member in the upper elastic region and the expansion force at the time of 1.7 times expansion per 15 mm width are 1. Less than the extension force at the time of 7 times extension,
A thigh of both legs and buttocks, a adult human dummy to the Shirimizo point and anal groove in the hip and buttocks after突点is formed, the anthropomorphic, among the Shirimizo An airpack wearing pressure sensor is attached to the groin point, which is a portion located immediately below the buttock rear projection point, and each of the thighs of the both legs is inserted through a pair of leg opening. The human body dummy while grasping the top of each side part of the diaper waist with one hand and pulling up the diaper at a constant speed so as to pass between the groin point and the buttock rear impact point in a predetermined time. When the wearing pressure in the process of wearing is measured, the maximum value of the wearing pressure measured at the groin point is between 0.5 and 1.5N.

The first invention has at least the following embodiments.
(1) The diaper has an absorbent body including a body fluid-absorbing core material and a liquid-permeable inner surface sheet that covers the core material, and the core material extends from the crotch region toward the rear waistline region. The rear end has a rear end, and the rear end is at least 70 mm away from the edge of the waistline opening.
(2) The human body dummy has an average human body shape of a Japanese woman in their 40s or 70s.

  The second invention of the present invention described so far can be summarized as follows at least.

And a thigh and buttocks of legs, said the buttocks by wearing the diaper according to claim 1 adult anthropomorphic being formed with Shirimizo the hip after突点, wearing of the diaper A method for judging ease,
The human body dummy and the diaper have a vertical direction and a horizontal direction,
The human body dummy includes an air pack wearing pressure sensor at least at the groin point of the groin point and the butt rear point, which is a portion of the groin located immediately below the butt rear point. And wearing pressure detected by the sensor is displayed by a pressure measuring instrument,
From the groin point to the buttocks rear impact point by gripping the tops of both sides of the torso of the diaper , each of which is inserted through a pair of leg openings, with one hand. Measuring the wearing pressure while pulling up the diaper at a constant speed so as to pass between the predetermined time, obtaining the maximum value of the wearing pressure at the groin point generated in the process of pulling up the diaper ,
The maximum value is compared among a plurality of the diapers worn by the human body dummy, and it is determined that the smaller the maximum value is, the easier it is to wear.

The second invention has at least the following embodiments.
(1) The diaper has a front waistline region and a rear waistline region, and an inner surface of each side edge of the front waistline region and an inner surface of each side edge of the rear waistline region are joined together, Is a disposable pants-type diaper for adults in which a side joint area, a waist opening, and a pair of leg openings are formed,
As the human body dummy, either one showing an average human body shape of a Japanese woman in their 40s or one showing an average human body shape of a Japanese woman in their 70s,
The anthropomorphic ventral and dorsal, and each of the rear waist region and the front waist region of the diaper, the lateral dimension of each of the anthropomorphic and the diaper bisects and continue the vertical direction An extended center line is entered, and the center line of the diaper in which the thigh is inserted through the leg opening is made to coincide with the center line of the human body dummy, so that the side joint region from the rear of the human body dummy Grip each top with one hand,
Each of the one hand when grasping straddles the side joint area, the thumb is positioned behind the side joint area, while the index finger is positioned in front of the side joint area,
The gripped diaper starts to be lifted from a lower portion of the groin point that is at least 100 mm away from the groin point, and the gap between the groin point of the human body dummy and the buttock rearward projecting point is Pull up at a constant speed so that the rim passes in a predetermined time,
The wearing pressure at the groin point generated in the process of pulling up the diaper is displayed every predetermined time by the pressure measuring device.
(2) The constant speed is 60 mm / second.
(3) The pressure measuring device displays the wearing pressure every 0.1 second.

DESCRIPTION OF SYMBOLS 10 Disposable pants-type diaper 11 Front waistline area 12 Rear waistline area 13 Inseam area 16 Side edge part 17 Side edge part 18 Side part joining area 20b Opening edge 21 Trunk opening 22 Leg opening 32 Absorber 38 Elastic member 39 Elastic member 39 44 Rear end 46 Core material 47 Inner surface sheet 61r Upper elastic region (first rear waistline elastic region)
62r Lower elastic region (second rear waist elastic region)
100 human body dummy 103 thigh 104 groin 105 butt rear protrusion 106 groin point 107b wearing pressure sensor 110 butt X horizontal direction Y vertical direction

Claims (7)

A front waistline region, a rear waistline region, and a crotch region are formed, and an inner surface of each side edge of the front waistline region and an inner surface of each side edge of the rear waistline region. together with the side bonding region extending vertically on each sides of the laterally junction is formed, be formed and a waist opening and a pair of leg openings, the side on respective front post waistline region A disposable pants-type diaper for adults in which a plurality of elastic members are attached in an extended state between the joint areas,
The rear waistline region includes an upper elastic region formed by a plurality of strips of the elastic member having a width from the edge of the waistline opening toward the lower side in the up and down direction, and adjacent to the upper elastic region. A lower elastic region formed by a plurality of strips of the elastic member having a downward width in a range of at least 40 mm,
The expansion ratio of the elastic member in the upper elastic region and the expansion force at the time of 1.7 times expansion per 15 mm width are 1. Less than the extension force at the time of 7 times extension,
A thigh of both legs and buttocks, a adult human dummy to the Shirimizo point and anal groove in the hip and buttocks after突点is formed, the anthropomorphic, among the Shirimizo An airpack wearing pressure sensor is attached to the groin point, which is a portion located immediately below the buttock rear projection point, and each of the thighs of the both legs is inserted through a pair of leg opening. The human body dummy while grasping the top of each side part of the diaper waist with one hand and pulling up the diaper at a constant speed so as to pass between the groin point and the buttock rear impact point in a predetermined time. A diaper characterized in that when the wearing pressure in the process of wearing is measured, the maximum value of the wearing pressure measured at the groin point is between 0.5 and 1.5N.   The diaper has an absorbent body including a bodily fluid-absorbing core material and a liquid-permeable inner surface sheet that covers the core material, and the core material extends from the crotch region toward the rear waistline region. The diaper according to claim 1, further comprising a rear end, the rear end being at least 70 mm away from an edge of the waistline opening.   The diaper according to claim 1 or 2, wherein the human body dummy has an average human body shape of a Japanese woman in their 40s or 70s. And a thigh and buttocks of legs, said the buttocks by wearing the diaper according to claim 1 adult anthropomorphic being formed with Shirimizo the hip after突点, wearing of the diaper A method for judging ease,
The human body dummy and the diaper have a vertical direction and a horizontal direction,
The human body dummy includes an air pack wearing pressure sensor at least at the groin point of the groin point and the butt rear point, which is a portion of the groin located immediately below the butt rear point. And wearing pressure detected by the sensor is displayed by a pressure measuring instrument,
From the groin point to the buttocks rear impact point by gripping the tops of both sides of the torso of the diaper , each of which is inserted through a pair of leg openings, with one hand. Measuring the wearing pressure while pulling up the diaper at a constant speed so as to pass between the predetermined time, obtaining the maximum value of the wearing pressure at the groin point generated in the process of pulling up the diaper ,
A method of comparing the maximum value among a plurality of the diapers worn by the human body dummy, and determining that the smaller the maximum value is, the easier it is to wear. The diaper has a front waistline region and a rear waistline region, and the inner surfaces of both side edges of the front waistline region and the inner surfaces of both side edges of the rear waistline region are joined together to form a pair of side portions. A disposable pants-type diaper for adults in which a joining area, a waistline opening, and a pair of leg opening are formed,
As the human body dummy, either one showing an average human body shape of a Japanese woman in their 40s or one showing an average human body shape of a Japanese woman in their 70s,
The anthropomorphic ventral and dorsal, and each of the rear waist region and the front waist region of the diaper, the lateral dimension of each of the anthropomorphic and the diaper bisects and continue the vertical direction An extended center line is entered, and the center line of the diaper in which the thigh is inserted through the leg opening is made to coincide with the center line of the human body dummy, so that the side joint region from the rear of the human body dummy Grip each top with one hand,
Each of the one hand when grasping straddles the side joint area, the thumb is positioned behind the side joint area, while the index finger is positioned in front of the side joint area,
The gripped diaper starts to be lifted from a lower portion of the groin point that is at least 100 mm away from the groin point, and the gap between the groin point of the human body dummy and the buttock rearward projecting point is Pull up at a constant speed so that the rim passes in a predetermined time,
The method according to claim 4, wherein the wearing pressure at the groin point generated in the process of pulling up the diaper is displayed every predetermined time by the pressure measuring device.   The method according to claim 4 or 5, wherein the constant speed is 60 mm / sec.   The method according to any one of claims 4 to 6, wherein the pressure measuring device displays the wearing pressure every 0.1 seconds.