JP6219661B2 - Wearing article - Google Patents

Description

  The present invention relates to a wearing article having a waistline portion disposed around a waistline of a wearer who is an infant.

  Conventionally, wearing articles including absorbent articles such as disposable diapers that cover the torso of infants and clothes such as swaddles have been provided (for example, Patent Document 1 and Patent Document 2).

  The disposable diaper of patent document 1 is comprised so that a wearer's inseam and waist may be covered. The case of Patent Document 2 is configured to cover from the head of the wearer to the toes.

  In general, it is known that an infant has a sense of security when held by a mother or the like, or when a body of the mother or the like is touching. In order to achieve skinship between such infants and their mothers, a lullaby is provided (for example, Patent Document 3). By using such a lullaby, it is easy to maintain a state where a mother or the like is holding an infant, and the infant can continue to feel secure.

Japanese Patent Laid-Open No. 10-165439 JP 2005-068584 A JP 2007-1111510 A

  However, the above-described conventional technology has the following problems. In the state where the infant is embraced by the mother or the like, the infant can obtain a sense of security due to the warmth of the mother or the like. However, in general, when an infant is laid down, the infant is once laid in a state where the mother is held, and then the infant is laid down on the bedding.

  Even if an infant sleeps once in the state of being wrapped in the mother's arm, if the child is laid down on bedding etc. away from the mother, the mother's warmth disappears and stability cannot be obtained There was a thing. As a result, the infant may not be able to maintain a restful sleep.

  Then, this invention is made | formed in view of such a condition, and it aims at providing the wearing article which is easy to maintain a restful sleep of an infant even if the infant leaves | separates from a mother. .

  A wearing article (disposable diaper 10) according to the present disclosure is a wearing article having a waistline portion including a front waistline portion that covers a wearer's abdomen and a back waistline portion that covers the wearer's buttocks, and is 29% or more and A high heat retention region (high heat retention region R1) having a heat retention rate of 60% or less, and a low heat retention region (low heat retention region R2) having a heat retention rate lower than that of the high heat retention region, A holding member (first elastic sheet 71, second elastic sheet 72, front leg elastic member 81F, rear leg elastic member, which is disposed at least on the waistline and holds the high heat retaining area on the wearer's body. 81R, fastening tape 90) is provided.

  According to the present disclosure, it is possible to provide a wearing article that can easily maintain a restful sleep of an infant even when the infant is away from the mother.

It is an expansion | deployment top view of the expansion state of the disposable diaper which concerns on this embodiment. It is AA sectional drawing shown in FIG. It is an expansion | deployment top view of the expansion state of the disposable diaper which concerns on a modification. It is BB sectional drawing shown in FIG.

  Next, an embodiment of a wearing article according to the present invention will be described with reference to the drawings. 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 and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

  The wearing article of the present embodiment is a pants-type disposable diaper 10. The wearing article in the present invention is not limited to a pants-type disposable diaper, and may be a tape-type disposable diaper. The wearing article of the present invention is not limited to a disposable diaper, and may be a garment such as underwear that does not have an absorber that absorbs excreta.

(1) Overall schematic configuration of disposable diaper FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment in an expanded state. FIG. 2 is a cross-sectional view taken along the line AA of FIG. Hereinafter, the plan view of FIG. 1 and the like is a diagram in which an elastic member such as a leg-hole elastic member is extended to a state in which a ridge such as a surface sheet constituting the disposable diaper is not formed.

  The disposable diaper 1 includes a front-rear direction L extending to the wearer's body front side and a rear body side, a width direction W orthogonal to the front-rear direction L, an inner direction toward the wearer, and an outer direction toward the inner direction. And having a thickness direction.

  After the disposable diaper 1 is applied to the front waistline S1 applied to the front waistline including the wearer's abdomen and the back waistline including the wearer's buttocks in the front-rear direction L of the disposable diaper 1, as shown in FIG. It has a waist part S2 and a crotch part S3 which is applied to the wearer's crotch and is located between the front waist part S1 and the rear waist part S2. The waistline portion includes a front waistline portion S1 and a back waistline portion.

  The disposable diaper 1 is composed of an absorbent main body 1A and an exterior body 1B, which are joined to each other by an adhesive, heat fusion, or the like.

  The absorbent main body 1A includes a top sheet 21 located on the wearer's skin contact surface side, a back sheet (not shown) located on the wearer's non-skin contact surface side, and the top sheet 21 and back sheet. And at least an absorber 30 located between them. The absorbent main body 1A is disposed across the front waistline portion S1, the back waistline portion S2, and the crotch portion S3.

  The top sheet 21 is liquid permeable and is provided on the surface side (skin contact surface side) of the absorber 30. A surface sheet is comprised by the nonwoven fabric, for example.

  The back sheet is liquid-impermeable and is provided on the back surface side (non-skin contact surface side) of the absorber 30. The back sheet is made of, for example, a film that does not transmit liquid. In addition, the back surface sheet may be configured by a single sheet or may be configured by laminating a plurality of sheets.

  The absorber 30 has an absorbent core on which an absorbent material is laminated. The absorbent body 30 of the present embodiment is composed of an absorbent core in which pulp and SAP are mixed, and a core wrap that wraps the absorbent core. As the core wrap, for example, a tissue can be used. In addition, the absorber 30 does not need to have the core wrap which wraps an absorptive core.

  The exterior body 1B includes a front exterior body 1BF disposed in the front waistline portion S1, and a rear exterior body 1BR disposed in the rear waistline portion S2. The front exterior body 1BF and the rear exterior body 1BR are separated from each other in the front-rear direction. The front exterior body 1BF and the rear exterior body 1BR may be integrated.

  The front waistline edge portion 4 located on one outer side in the width direction of the front exterior body 1BF is joined to the rear waistline edge portion 6 located on the one outer side in the width direction of the rear exterior body 1BR, and the other of the front exterior body 1BF. By disposing the front waistline edge portion 4 ′ located on the outer side in the width direction and the rear waistline edge portion 6 ′ located on the outer side in the width direction of the rear exterior body 1 BR, the disposable diaper 1 is formed in a pants shape. The front waistline portion S1 and the back waistline portion S2 of the pants-type disposable diaper are formed with joint portions (not shown) in which the edges of each other are joined. It is the area of.

The disposable diaper 1 has a waist opening (not shown) disposed around the wearer's waist and a pair of legs disposed around the wearer's leg in a pants-shaped state. A leg opening (not shown) is formed.
The exterior body 1B is configured by laminating a plurality of sheets. The front exterior body 1BF includes a first elastic sheet 71 arranged on the skin contact surface side, a second elastic sheet 72 arranged on the non-skin contact surface side, and the non-skin of the first elastic sheet 71 A first non-stretchable sheet 73 disposed on the contact surface; and a second non-stretchable sheet 74 disposed on the skin contact surface of the second stretchable sheet 72. A first non-stretchable sheet 73 and a second non-stretchable sheet 74 are disposed between the first stretchable sheet 71 and the second stretchable sheet 72.

  The 1st elastic sheet 71 and the 2nd elastic sheet 72 are arrange | positioned in the fixed range which goes back from the front side edge part of front exterior body 1BF, and are not provided in the rear side edge part of front exterior body 1BF. Since the 1st elastic sheet 71 and the 2nd elastic sheet 72 are provided in the fixed range which goes back from the front side edge part of front exterior body 1BF, the heat retention rate of the said fixed range can be raised. The rear side end portion of the front exterior body has a central portion that overlaps the absorbent main body 1A and a side portion on the outer side in the width direction than the absorbent main body.

  A first non-stretchable sheet 73 and a second non-stretchable sheet 74 are disposed on the side portion at the rear end of the front exterior body, and the first non-stretchable sheet 73 and the second non-stretchable sheet 74 A front leg elastic member 81F is disposed therebetween. The front leg elastic member 81F is disposed so as to be extendable and contractible in the width direction. Therefore, the side part of the rear side edge part of the front exterior body has elasticity in the width direction. On the other hand, the first non-stretchable sheet 73, the second non-stretchable sheet 74, and the absorbent main body 1A are disposed in the central portion at the rear end of the front exterior body, but no elastic member is disposed. . Therefore, the center part of the rear side end part of the front exterior body does not have elasticity in the width direction.

  The first elastic sheet 71 and the second elastic sheet have elasticity that expands and contracts at least in the width direction. More preferably, when the first stretchable sheet 71 and the second stretchable sheet 72 are stretched in one direction of the sheet, the width of the sheet in the other direction orthogonal to the stretch direction becomes narrower (so-called width is entered). It is preferable that it is comprised by. According to such a sheet, the sheet contracts not only in one direction but also in the other direction, and random irregularities are easily formed on the entire sheet. By forming irregularities on the sheet, an air layer can be provided between the sheet and the skin of the wearer, and the heat retention rate can be increased.

  The rear exterior body 1BR includes a first elastic sheet 71 disposed on the skin contact surface side, a second elastic sheet 72 disposed on the non-skin contact surface side, and the non-skin of the first elastic sheet 71. And a rear leg elastic member 81R disposed on the contact surface. No sheet-like stretchable member is disposed on the rear exterior body 1BR.

  The front end portion of the rear exterior body has a central portion that overlaps the absorbent main body 1A and a side portion on the outer side in the width direction than the absorbent main body. A first non-stretchable sheet 73 and a second non-stretchable sheet 74 are disposed on the side portion at the front end of the rear exterior body, and between the first non-stretchable sheet 73 and the second non-stretchable sheet 74. A rear leg elastic member 81R is disposed on the rear leg. The rear leg elastic member 81R is disposed so as to be extendable and contractible in the width direction. Therefore, the side part of the front side end part of the rear exterior body has elasticity in the width direction. On the other hand, the first non-stretchable sheet 73, the second non-stretchable sheet 74, and the absorbent main body 1A are disposed in the central portion of the front end portion of the rear exterior body, but no elastic member is disposed. Therefore, the center part of the front side end part of the rear exterior body does not have elasticity in the width direction.

  The front leg elastic member 81F, the first elastic sheet 71, and the second elastic sheet 72 of the front exterior body 1BF function as a holding member that holds the high heat retaining area on the wearer's body. The rear leg elastic member 81 </ b> R of the rear exterior body 1 </ b> BR functions as a holding member that holds the high heat retention region on the wearer's body. Moreover, the elastic sheet which comprises a holding member may be laminated | stacked by several elastic sheets like this Embodiment, and may be comprised only by 1 layer. Further, instead of the stretchable sheet, a rubber thread as a holding member may be provided.

  The front waistline portion and the rear waistline portion are each provided with a high heat retention region R1 and a low heat retention region R2 having a heat retention rate lower than that of the high heat retention region. The high heat retention region R1 is a region having a heat retention rate of 29% or more and 60% or less. FIG. 1 shows the high heat retention region R1 and the low heat retention region R2 with different oblique lines.

  The high heat retaining region R1 is disposed in a part of the front waistline that hits the wearer's abdomen, a part of the front waistline that hits the buttocks of the wearer, and a part of the front waistline that hits the base of the buttocks. The low heat retention region R2 is a portion of the front waistline that overlaps with the absorbent main body, a portion of the rear waistline that overlaps with the absorbent main body, and a portion of the rear waistline that is behind the absorbent main body and corresponds to the buttocks. It is arrange | positioned in the site | part behind the area | region.

  The high heat retention region is configured to have a relatively high heat retention rate by disposing an elastic sheet, or is configured to have a relatively high heat retention rate by disposing a sheet material having a hygroscopic heat generating material. The sheet material having the heat storage and heat insulation material is arranged to have a relatively high heat insulation rate, or the sheet material having the far infrared radiation material is arranged to have a relatively high temperature insulation rate. Or In the disposable diaper of the present embodiment, at least one of the first stretchable sheet 71, the second stretchable sheet 72, the first non-stretchable sheet 73, and the second non-stretchable sheet 74 is a moisture-absorbing heat generating material, a heat storage and heat retention. It is configured to include at least one of a material and a far infrared radiation material.

  Examples of the far-infrared radiation material include alumina-based ceramics, zirconium-based ceramics, and silicon-based ceramics that efficiently radiate far-infrared rays in a low temperature range of 20 to 40 ° C. The wearer can be warmed by emitting far-infrared rays from the far-infrared emitting material.

  As the hygroscopic heat generating material, for example, acrylate fiber and wool are used. As other moisture-absorbing heat generating materials, cupra, rayon, etc. are conceivable, and these materials can be used instead of ex or wool. Moreover, long fibers may be used instead of blended yarns, and fiber materials such as nonwoven fabrics and textiles may be used. The hygroscopic exothermic material increases heat generation and warms the wearer.

  The heat storage and heat retaining material is a highly efficient substance that absorbs a specific wavelength of sunlight and converts it into heat energy. Specifically, zirconium can be exemplified.

  The heat retention rate in the present invention can be measured as follows.

  (1) KES-F7 precision rapid thermophysical property measuring device manufactured by Kato Tech Co., Ltd. Thermolab II is prepared, and the room temperature is adjusted to 20 ° C. and the humidity is adjusted to 60% RH.

  (2) When measuring the heat retention rate of the disposable diaper, centering on the center of the excretory opening contact area, the direction perpendicular to the longitudinal direction (hereinafter referred to as the direction perpendicular to the longitudinal direction) is simply “ Cut a 12 cm sample (sometimes referred to as “orthogonal direction”).

  (3) The sample is attached to the sample frame attached to Thermolab II with double-sided tape.

In the case of disposable diapers, the sample is affixed to the sample frame according to the normal procedure of the measuring device, and then the sample is placed on the shorts with double-sided tape so that the sample comes to the center of the sample frame. paste.

  (4) In Thermolab II, the wind speed of the wind tunnel is set to 30 cm / second, and the temperature of BT-Box is set to 30 ° C.

  (5) The amount of heat Qd required to keep the temperature of the sample frame on which the sample is attached at 30 ° C. is measured.

  (6) Measure the amount of heat Q0 required to keep the temperature of the sample frame at 30 ° C. in the absence of a sample. In the case of disposable diapers, the amount of heat Q0 was measured with only the sample frame placed on the BT-Box, and in the case of a sanitary napkin, the sample frame with shorts attached was placed on the BT-Box. The amount of heat Q0 is measured in the state.

  (7) The heat retention rate is calculated according to the following equation (1).

Thermal insulation rate (%) = 100 × (Q0−Qd) / Q0 formula (1)
When the disposable diaper configured in this manner is attached to the wearer, the high heat retaining region R1 of the front waistline portion hits the wearer's stomach and buttocks, and the wearer's stomach and buttocks can be warmed. Moreover, the low heat retention area | region R2 of a back waist part hits a wearer's buttocks, and can wear a wearer's stomach and buttocks. On the other hand, since the low heat retention area | region R2 is provided in the part which hits a wearer's inseam, it can suppress that an inseam is heated too much.

(2) Actions / effects For example, the wearer can feel the warmth of the mother when held by the mother, but the wearer loses the warmth when laid down in a bed or the like, thereby obtaining a sense of security. I can't. However, when there is a high heat retention region having a heat retention rate within a predetermined range, and the high heat retention region is held by the wearer's body by the holding member, the part corresponding to the high heat retention region is separated from the mother or the like Even so, infants can easily experience the warmth of their mothers and the like. Furthermore, the baby's own body temperature can be positively maintained and a heat retaining effect can be exhibited.

  By providing the high heat retention region and the low heat retention region together, the wearer can easily feel that a part (high heat retention region) is kept warm even when the wearer is away from the warmth of the mother. Accordingly, even when the mother is away from the mother or the like, a state in which the mother's warmth remains can be realized in a pseudo manner, and it is easy to maintain a comfortable sleep of the infant.

  Moreover, when a heat retention rate is made too high in the disposable diaper having an absorbent body, there is a risk of stuffiness. However, discomfort is less likely to occur by disposing a region having low heat retention, and discomfort due to excessive heat accumulation is less likely to occur by setting the heat retention rate lower than 60%.

  Further, as a result of various verifications by the present applicant, it was found that the heat of the diaper is easily retained when the heat retention rate of the high heat retention region R1 is 29% or more.

  In addition, as a result of intensive studies by the applicant, infants are likely to settle down and sleep well when their abdomen is kept warm by placing a futon on the abdomen or a mother's hands on the abdomen. all right. The disposable diaper according to the present embodiment can keep warm the part that hits the wearer's abdomen by the high heat-retaining region R1. Therefore, it becomes possible for the infant to settle down and sleep.

  The high heat retention area | region is arrange | positioned in the site | part which hits a wearer's buttocks in a waist part. Therefore, a wearer's buttocks can be warmed locally. The buttocks have a relatively large amount of blood flow, and can warm the trunk effectively by warming the buttocks. On the other hand, since the low heat retention area | region is provided, it can suppress heating the whole site | part covered with the disposable diaper excessively.

  Since the sheet material in the high heat retention region includes moisture-absorbing heat-generating fibers or far-infrared fibers, it is possible to increase the amount of heat generated at the portion that hits the sheet material. Since the high heat retention region R1 can be provided by the material of the sheet material that constitutes the exterior body, it can be easily configured as compared with a mode in which other members constituting the high heat retention region R1 are provided.

  In the disposable diaper, a first elastic sheet 71, a second elastic sheet 72, a front leg elastic member 81F, and a rear leg elastic member 81R as holding members are provided so as to overlap the high heat retaining region R1. Therefore, the high heat retention area | region R1 can be closely_contact | adhered to a wearer's body with the said holding member, and a wearer's abdomen and buttocks can be warmed locally.

(3) Wearing article which concerns on a modification Next, the wearing article which concerns on a modification is demonstrated. In addition, in description of the following modified examples, the same code | symbol is attached | subjected to the same part as the disposable diaper 10 which concerns on embodiment mentioned above, and a different part is mainly demonstrated.

  FIG. 3 is a developed plan view of the disposable diaper 10 </ b> A according to Modification 1 in an extended state. 4 is a cross-sectional view taken along line BB shown in FIG. A disposable diaper 10A according to Modification 1 is not a pants-type disposable diaper, but an open-type disposable diaper in which a front waistline portion and the rear waistline portion are separated from each other.

  A disposable diaper 10A according to Modification 1 is provided with a fastening tape 90 as a fastening member that extends outward in the width direction from the exterior body 1B at the rear waistline portion. When the disposable diaper configured in this way is attached to the wearer, the fastening tape of the rear waistline part is drawn to the front waistline part with the crotch part of the disposable diaper applied to the wearer's crotch part, and the fastening tape To the front waistline. In a state where the fastening tape is fixed to the front waistline portion, the range extending in the width direction from the fastening tape is in close contact with the wearer's body. Therefore, the high heat retention area | region R1 in the range extended in a width direction from a fastening tape can be stuck to a wearer's body. The fastening tape functions as a holding member that holds the high heat retention region on the wearer's body.

  The front exterior body is provided with a gel layer 85 made of a gel material. The gel layer 85 is disposed on the skin contact surface of the disposable diaper. The gel layer 85 is disposed at the center in the width direction of the front exterior body. The front end of the gel layer 85 coincides with the front end of the front exterior body 1BF, and the rear end of the gel layer coincides with the rear end of the front exterior body 1BF. The gel layer 85 covers the front end of the absorbent main body. The region where the gel layer 85 is disposed has a higher heat retention rate than the region where the gel layer is not disposed, and becomes a high heat retention region R1.

  The gel layer 85 has heat retaining properties. As the gel material constituting the gel layer, it is possible to use a mixture of a resin and an oil agent, an oily compound, a thickening polysaccharide, a mixture of a gel-forming polymer and a crosslinking agent in water and a polyhydric alcohol, and the like. It is possible to use a large heat storage amount.

  The gel layer 85 can enhance the heat retaining property of the high heat retaining region R1. High heat retention area | region R1 is comprised so that a wearer's abdomen may be hit, and a wearer's abdomen can be warmed by the said high heat retention area | region. Moreover, the gel layer is arrange | positioned at the skin contact surface of a disposable diaper so that it may contact | abut to a wearer's skin. Therefore, the heat-retaining gel can be adhered to the skin, and the wearer's body can be effectively kept warm locally.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

  For example, as a disposable diaper as a modified example, a nonwoven fabric sheet is disposed on the wearer side surface of the high heat retention region, a nonwoven fabric sheet is disposed on the wearer side surface of the high heat retention region, The convex part row | line | column with which a convex part continues, and the recessed part row | line | column formed between the convex part row | line | columns are formed. The convex row and the concave row may extend in a direction intersecting with a stretchable direction of the stretchable sheet or the thread rubber as the stretchable member, or extend in a stretchable direction of the stretchable sheet or the thread rubber as the stretchable member. It may be a configuration.

Since the nonwoven fabric sheet which has a convex part and a recessed part is provided, the convex part of a nonwoven fabric sheet contacts a wearer's body, and the recessed part of a nonwoven fabric sheet does not contact a wearer's body. Therefore, the space corresponding to the recessed part of a nonwoven fabric sheet can be formed between a wearer's body and a disposable diaper. By forming the space, the heat retaining property can be further improved. Examples of the nonwoven fabric sheet include a spunbond nonwoven fabric or an air-through nonwoven fabric made of heat-welded fibers having a basis weight of 20 g / m ² .

  Moreover, the structure provided with a waist part and a crotch part may be sufficient as a wearing article, and the structure which consists only of a waist part without a crotch part may be sufficient. Since the wearing article has at least a waistline portion, a part of the waistline of the wearer can be kept warm and a state where the warmth of the mother remains can be realized in a pseudo manner.

10, 10AD: Disposable diaper 1A: Absorbent body 1B: Exterior body 1BF: Front exterior body 1BR: Rear exterior body 3: Joint part 4: Front waistline edge 6: Rear waistline edge 71: First stretchable sheet 72: Second elastic sheet 73: first non-elastic sheet 74: second non-elastic sheet 81F: front leg elastic member 81R: rear leg elastic member 82: waist elastic member 85: gel layer 90: fastening tape L: front and rear Direction S1: Front waistline S2: Rear waistline S3: Inseam W: Width direction

Claims (11)

Waistline portion before covering the abdomen of the wearer, and have a waist portion including a waist portion after covering the buttocks of the wearer,
A wearing article comprising an absorbent main body including an absorbent ,
A high heat retention region having a heat retention rate of 29% or more and 60% or less, and a low heat retention region having a heat retention rate lower than the high heat retention region,
The high heat retention region is disposed at least on the waistline portion,
A holding member is provided to hold the high heat retention region on the wearer's body ,
A wearing article in which the high heat retention region is not provided in a region overlapping the absorbent main body . The front waistline portion includes a first region that overlaps the absorbent main body, a second region that is outside in the width direction of the first region, and a third region that is positioned forward of the first region and the second region. An area, and
The wearing article according to claim 1 in which said 2nd field and said 3rd field are said high heat retention fields . The wearing article according to claim 2, wherein an extension rate in the width direction of the second region and an extension rate in the width direction of the third region are higher than an extension rate in the width direction of the first region .   The rear waistline portion has a fourth region corresponding to the base of the wearer's buttocks, and a fifth region other than the fourth region,
  The fourth region is the high heat retention region,
  The wearing article according to any one of claims 1 to 3, wherein the fifth region is the low heat retaining region. The waistline portion has a sheet material that covers the wearer's body,
The wearing article according to any one of claims 1 to 4 , wherein the sheet material in the high heat retention region includes at least one of a hygroscopic heat generation material, a heat storage heat retention material, and a far infrared radiation material. The wearing article according to any one of claims 1 to 4 , wherein a gel material is disposed in the high heat retention region. The wearing article is an open-type disposable diaper in which the front waistline portion and the rear waistline portion are separated from each other,
The holding member is provided on one of the rear waistline portion and the front waistline portion, a fastening member for fastening to one of the rear waistline portion and the front waistline portion, one of claims 1 to 6 The wearing article according to crab. The wearing article according to any one of claims 1 to 6 , wherein the holding member is an elastic member that expands and contracts at least in a width direction of the wearing article. The wearing article according to claim 8 , wherein the stretchable member is a sheet-like stretchable member that stretches in the front-rear direction and the width direction of the wearing article. The wearing article according to claim 8 or 9 , wherein the holding member is disposed so as to overlap with the high heat retaining region. A non-woven sheet is disposed on the wearer side surface of the high heat retention region,
The wearing according to any one of claims 8 to 10 , wherein the nonwoven fabric sheet is formed with a convex portion row in which convex portions are continuous and a concave portion row formed between the convex portion rows. Goods.

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