RU144709U1 - ABSORBENT PRODUCT - Google Patents

Abstract

1. An elongated absorbent article comprising an absorbent element and a bottom sheet located on the non-skin side of the absorbent element, having a longitudinal direction corresponding to the front to back direction of the wearer, and a transverse direction perpendicular to the longitudinal direction, and having a front portion configured to wearing near the front of the carrier, a crotch portion configured to be worn near the crotch of the carrier, and a rear portion configured to be worn poison with the back side of the carrier, while the absorbent article has a moisture indicator between the bottom sheet and the absorbent element, while the humidity indicator contains coated areas coated with a color-changing agent that changes color upon contact with water and continues in the longitudinal direction so that at least they cover the crotch part and the back part, while the portion of the moisture indicator located in the crotch part continues continuously with the same width, while only the portion of the indicator is wet the spine, extending from the longitudinal end of the moisture indicator located on the rear side to the longitudinal center of the crotch part, has a less visible part having lower visibility after color change compared to the rest of the humidity indicator, and a part with high visibility having higher visibility after color changes compared to the less visible part, while the part with high visibility is located on both sides of the less visible part in the longitudinal direction, while the less visible part has

Description

FIELD OF TECHNOLOGY

The present utility model relates to an absorbent article such as a disposable diaper.

BACKGROUND

There are various suggestions for disposable diapers equipped with a moisture indicator that “signals” the diaper's humidity due to urination or fluid secretion, so the carer knows when to change diapers. For example, JP 2004-503297A proposes to provide a moisture indicator between the bottom sheet and the absorbent element in the crotch portion of a disposable diaper, the indicator containing a dye that loses or changes color or tint when in contact with the liquid. JP 2008-104850A proposes a disposable diaper provided with a moisture indicator having a moisture indicator composition that is initially colorless. These publications describe the placement of moisture indicators at some intervals in the longitudinal or transverse direction of the diaper (see FIGS. 1 and 3 of JP 2004-503297A and FIG. 5 of JP 2008-104850A).

JP 2005-21389A describes that linear color-changing patterns and linear non-color-changing patterns are arranged in predetermined order in predetermined places in the crotch portion of the disposable diaper between the absorbent core and the bottom sheet so that they intersect each other, for example, in the form a lattice in which color-changing patterns contain a hydrophilic agent capable of changing color upon contact with water, and color-less patterns do not change color upon contact with water. The color of the color-changing pattern and the color of the non-color pattern are selected such that they are the same or similar before changing the color of the color-changing pattern, but become different from each other after changing color, or they are not alike before changing the colors of the pattern that changes color, but become similar or similar to each other after changing the color of the pattern that changes color. JP 2005-21389A mentions that after changing the color of the color changing patterns when in contact with urine, a caregiver who looks at the diaper from the outside of the diaper will notice a contrast between the pattern after the color change and the colorless pattern, and will know that it's time to change diapers.

The moisture indicator of the type described is typically made in such a way that it becomes visible or distinguishable in order to assist the caregiver so that he can see from the outside when this indicator is wet due to urination and the like. However, if a third party other than the caregiver (for example, different from the mother of the baby wearing the diaper) draws attention to a visible change in the indicator that signals urination, the carrier’s vanity may be affected. In connection with these considerations, JP 2003-70837A proposes a disposable diaper having an intermediate sheet coated with a surfactant between the lower sheet and the absorbent core. The predetermined pattern is printed on the side of the bottom sheet and / or on the side of the intermediate sheet facing each other by using a water-soluble coloring matter so that the pattern is visible from the outside. When urinating, urine causes dissolution of both the surfactant and the dye, and the dissolved surfactant and dye pass through the intermediate sheet and are absorbed by the absorbent core, so that the pattern printed by the water-soluble dye basically disappears. FIG. 1 of JP 2003-70837A shows an example of a pattern “drawn” by a water-soluble coloring matter that consists of three stars spaced apart from each other in a diaper portion representing a transition from the front to the crotch portion along the longitudinal direction of the diaper.

SUMMARY OF THE USE OF A USEFUL MODEL

The invention relates to an elongated absorbent article including an absorbent element and a bottom sheet located on the non-skin side of the absorbent element. The absorbent article has a longitudinal direction corresponding to the front to back direction on the carrier and a transverse direction perpendicular to the longitudinal direction. The absorbent article has a front part that can be worn close to the front side of the wearer, a crotch part that can be worn close to the crotch of the wearer, and a back part that can be worn close to the back of the wearer. The absorbent article has a moisture indicator between the bottom sheet and the absorbent element, wherein the humidity indicator includes coated areas coated with a color-changing agent that changes color upon contact with water, and continuing in the longitudinal direction so that they are at least cover the crotch and back. The moisture indicator portion located in the crotch portion continues continuously with the same width. Only a portion of the humidity indicator, extending from the longitudinal end of the humidity indicator located on the rear side to the longitudinal center of the crotch part, has a less visible part having lower visibility after color change compared to the rest of the indicator, and a part with high visibility having higher visibility after a change in color compared to the less visible part, while the part with high visibility is located on both sides of the less visible part in the longitudinal direction. The less visible part has one of the following configurations: (1) the less visible part includes an uncoated area that extends across the entire length of the moisture indicator in the transverse direction, while the uncoated area is an area not covered by a color-changing agent, and (2 ) the less visible part has a smaller, certain width of the coating of the agent that changes color, compared with the part with high visibility, while the width of the coating is set so that when drawing an imaginary straight line Q crossing the moisture indicator, in any humidity indicator spot sum of lengths of line segments Q, which overlap any of the coated area, is regarded as the width of the coating agent, which changes color at a given place.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a partially cutaway plan view of a disposable diaper as one embodiment of an absorbent article according to a utility model in its flat unfolded configuration with all elastic elements in an unstretched condition when viewed from the bottom sheet side (from skin side).

Figure 2 is a cross section schematically showing a section taken along line I-I in figure 1.

Each of FIG. 3 (a), FIG. 3 (b), and FIG. 3 (c) is a schematic plan view of a modification of a humidity indicator in accordance with a utility model.

Each of FIG. 4 (a), FIG. 4 (b), and FIG. 4 (c) is a schematic plan view of another modification of a humidity indicator in accordance with a utility model.

DETAILED DESCRIPTION OF A USEFUL MODEL

The moisture indicator in a disposable diaper is usually provided in such a way that it continues both forward and backward from the place where the body’s fluid secretions (e.g. urine) will first be located (i.e. the fluid secretion points) in the longitudinal direction, as described in each of the publications above. The fluid outlet is usually located in the center or near the longitudinal center of the crotch. Despite the fact that the back of the diaper is remote from the fluid, it is a point indicating the time when the diaper should be changed because it is compressed when the carrier is lying on its back or sitting on the car seat, and therefore have a significantly reduced ability to absorb fluids and can cause leakage even with a small amount of discharge. Therefore, the humidity indicator is inspected so that the caregiver receives information not only about whether there was a discharge of fluid (for example, urination), but also about the place in the back to which the fluid spread from the point of fluid release and to which she reached, that is, information about the extent to which the absorbent capacity of the diaper was used.

When a child wearing a diaper does not have a piece of clothing worn over the diaper, it is relatively easy for the mother to visually verify the visual change in the moisture indicator of the diaper. However, when, as often happens, a child wears a garment over his diaper, the mother should inspect the moisture indicator through the gap between the garment opening for the waist or legs and the diaper. If this gap is small, the mother will have to look at the indicator only at an angle. Diapers having a normal moisture indicator cannot provide the caregiver with accurate information about the visual change in the indicator, in particular the location of the selected fluid in the back of the diaper.

Accordingly, a utility model relates to an absorbent article that “emits” a signal that allows a caregiver to easily and accurately know the presence of a fluid and the location of the fluid at the rear of the absorbent article.

In accordance with a utility model, an elongated absorbent article is developed comprising an absorbent element and a bottom sheet located on the non-skin side of the absorbent element, having a longitudinal direction corresponding to the front to back direction on the carrier and a transverse direction perpendicular to the longitudinal direction and having a front part configured to be worn close to the front side of the wearer, the crotch portion made to be worn close to the crotch of the wearer, and the rear a part adapted to be worn close to the back of the carrier, the absorbent article having a moisture indicator between the bottom sheet and the absorbent member, the moisture indicator comprising coated areas coated with a color-changing agent that changes color upon contact with water, and extending in the longitudinal direction so that at least they cover the crotch part and the back part, while the portion of the humidity indicator located in the crotch part continues continuously with the same irina, while only the humidity indicator section, extending from the longitudinal part of the humidity indicator located on the back of the longitudinal end to the longitudinal center of the crotch part, has a less visible part having lower visibility after color change compared to the rest of the humidity indicator, and part with a large visibility having higher visibility after a color change compared to the less visible part, while the part with high visibility is located on both sides of the less visible part in the longitudinal the direction and the less visible part has one of the following configurations: (1) the less visible part contains an uncoated area that extends across the entire length of the moisture indicator in the transverse direction, while the uncoated area is a zone not covered by a color-changing agent, and (2) the less visible part has a smaller, defined width of the coating of the color-changing agent compared to the part with high visibility, and the width of the coating is set so that when drawing an imaginary straight line Q crossing the indicator moisture spine, anywhere humidity indicator sum of lengths of line segments Q, which overlap any of the coated area, is regarded as the width of the coating agent, which changes color at a given place.

According to a utility model, the absorbent article “gives out” a signal that allows the caregiver to easily and accurately find out about the presence of the selected fluid and the location of the fluid in the back of the absorbent article.

An absorbent article according to a utility model will be described on the basis of a disposable diaper as a preferred embodiment with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the diaper 1 of this embodiment includes an absorbent element 4 and a bottom sheet 3 located on the non-skin side of the absorbent element 4 and has a longitudinal direction X corresponding to the front to back direction of the carrier, and a transverse direction Y perpendicular to the longitudinal direction X.

As used herein, the term “skin side” refers to the side of the absorbent article (diaper 1) or the element forming the absorbent article (eg, top sheet 2, bottom sheet 3 or absorbent member 4) that faces the skin of the wearer in absorbent article wearing time. The term “non-skin side” refers to the side of the absorbent article or the element forming the absorbent article that faces away from the wearer's skin (the side facing the garment) while wearing the absorbent article. The term “longitudinal direction X” refers to a direction coinciding with a direction along the longer side of an absorbent article or an element forming an absorbent article (eg, absorbent element 4), and the term “transverse direction Y” refers to a direction coinciding with a width direction or transverse the direction of the absorbent article or the element forming the absorbent article (for example, absorbent element 4).

Upon closer examination, it should be noted that the diaper 1 is what is called a diaper of the type disclosed. As shown in FIGS. 1 and 2, the diaper 1 includes a liquid-permeable topsheet 2 forming a skin-facing side, liquid-impervious or water-repellent (it is envisaged that these properties are hereinafter referred to as “liquid-impermeable”) the bottom sheet 3, forming a non-skin side, and a liquid retaining, absorbent element 4 located between sheets 2 and 3. The diaper 1 has a greater length in one direction (longitudinal direction) than in the transverse direction, and essentially wish to set up an extended / elongated in plan, as shown in Figure 1. Each of the upper sheet 2 and the lower sheet 3 is larger in comparison with the absorbent element 4 and extends outward from the periphery of the absorbent element 4.

The diaper 1 has a front part A placed on the front side of the carrier, a crotch part B placed on the crotch of the carrier, and a rear part C placed on the rear side of the carrier, which are arranged in this order in the longitudinal direction X. The crotch part B includes a place , in which the body’s fluid secretions (e.g. urine) will be located first (the location of the fluid). The laterally opposite lateral edges of the crotch portion B extending along the longitudinal direction X are concave inward, so that the diaper 1 has an hourglass shape, and a part thereof that is middle in the longitudinal direction is narrowed in plan view as shown in FIG. one.

The front part A is a part extending from one longitudinal end 1a of the diaper 1 (the longitudinal end of the part placed on the front side of the wearer while wearing the absorbent article) at a distance of 25% to 40% of the total length of the diaper 1 in the longitudinal direction X The back part C is a part extending from the other longitudinal end 1c of the diaper 1 (the longitudinal end of the part placed on the back side of the wearer while wearing the absorbent article) at a distance of 25% to 40% of the entire length of the diaper 1 in the longitudinal direction X. The crotch part B is a part located between the front part A and the rear part C and extending over a length of 20% to 50% of the total length of the diaper 1 in the longitudinal direction X. When the absorbent article (disposable diaper) is divided into the crotch part, the front part and the back part in the longitudinal direction, the entire length in the longitudinal direction can be divided into three sections, and the middle section, the section on the front side and the section rear side can be regarded respectively as the crotch portion, front and rear. The diaper 1 of this embodiment can be divided in a similar manner.

As shown in FIG. 2, the absorbent member 4 consists of a retaining liquid of the absorbent core 40 and a permeable core wrap sheet 41 covering the absorbent core 40. The core wrap sheet 41 includes a first core wrap sheet 41a covering the skin-facing side absorbent core 40 (side facing the top sheet 2), and a second core wrapping sheet 41b covering the non-skin side (side facing the back sheet 3), side edges and portions of the hney side of the absorbent core 40. The sheet 41 for wrapping the core is used to maintain the shape of the absorbent core 40. The absorbent core 40 and a sheet 41 for wrapping the core may be bonded together by known bonding means such as hot melt adhesive.

The absorbent element 4 is held between the upper sheet 2 and the lower sheet 3. The upper sheet 2 and the lower sheet 3 protrude back and forth from the longitudinal ends of the absorbent element 4 to form the waist parts 5, 5. At least one of the waist parts has elastic elements 51 for the waist, fixed in their stretched state between the two sheets 2 and 3. The upper sheet 2 and the lower sheet 3 protrude outward in the transverse direction from both side edges of the absorbent element 4 to form parts 6, 6 for the legs. Each of the parts 6, 6 for the legs has elastic elements 61 for the legs, fixed in their stretched condition between the two sheets 2 and 3. When wearing the diaper 1, the elastic elements 51 and 61 are pulled together to form assemblies for the waist and assemblies for the legs. The diaper 1 has two standing protective elements 7 along the side portions of the top sheet 2. Each standing protective element 7 has elastic elements 71 of the standing protective element fixed in their extended state along its loose end. While wearing the diaper 1, the elastic members 71 are pulled together to form standing assemblies.

As shown in FIG. 1, the diaper 1 has two fastening tapes 8 provided along the lateral edges of its rear part C. Each fastening tape 8 has an attachable part (not shown) formed from the male component of the mechanical fastening element. The receiving zone 9, formed from the female component of the mechanical fastening element, is provided on the non-skin side (bottom sheet 3) of the front part A of the diaper 1. The receiving zone to which the attached part of the fastening tape 8 is to be detachably attached is formed by attachment the female component of the mechanical fastening element to the non-skin side of the bottom sheet 3 by using known bonding means, such as adhesive bonding or heat sealing.

As shown in figures 1 and 2, the bottom sheet 3 is a laminate consisting of a moisture-permeable sheet 30 and a sheet 31 of non-woven material. The moisture permeable sheet 30 is an inner sheet forming the skin side of the bottom sheet 3 (the side facing the absorbent member 4), and the nonwoven sheet 31 is the outer sheet forming the skin side of the bottom sheet 3 (the outer side of the diaper 1 ) The multilayer structure has a moisture-permeable sheet 30 and a sheet of nonwoven material 31 in the direction from the place next to the absorbent element 4 to a place located at a distance from the absorbent element 4. As shown in figure 1, the moisture-permeable sheet 30 and the sheet 31 of nonwoven material have the same length the longitudinal direction X, and the width of the moisture-permeable sheet 30 is less than the width of the sheet 31 of nonwoven material in the transverse direction Y, and therefore, the moisture-permeable sheet 30 is relatively narrow. Both the moisture-permeable sheet 30 and the nonwoven sheet 31 are provided in the front part A, the crotch part B and the back part C. The moisture-permeable sheet 30 is larger than the absorbent element 4 so that it covers the entire area of the non-skin side of the absorbent element 4 (side facing back sheet 3). The moisture permeable sheet 30 and the nonwoven sheet 31 can be bonded together by known bonding means, such as hot melt adhesive.

As shown in FIG. 1, in this embodiment, the bottom sheet 3 has a plurality of pattern elements 35 printed with a color different from the background color of the bottom sheet 3. Each of the pattern elements 35 has a dot shape (circular shape) in a plan view and printed on the non-skin side of the moisture-permeable sheet 30 (the side facing the non-woven fabric sheet 31) forming the bottom sheet 3. The pattern elements 35 are printed over the entire non-skin-side side of the moisture-permeable sheet 30 in the form of dots from p an apparent intervals. Each element of the pattern is surrounded by a background color of the non-printable area of the moisture-permeable sheet 30. In this embodiment, the background color of the moisture-permeable sheet 30 and the nonwoven sheet 31 is white, the same as the color of the bottom sheet material used in absorbent articles of this type. Pattern elements 35 having a color different from white are visible through the nonwoven fabric sheet 31, that is, they are visible from the outside of the diaper 1.

The elements 35 of the pattern are preferably arranged so that they do not overlap with the coated zones 11S and 12S, which are coated with an agent that changes color upon contact with water (hereinafter referred to simply as coated zones), and which form an indicator 10, so as described hereinafter the functioning of indicator 10 may not be impaired. The elements 35 of the pattern by themselves do not change color upon contact with water. That is, the pattern elements 35 are preferably arranged in a certain order so that they do not overlap with the indicator 10. If the pattern elements 35 and the indicator 10 overlap each other, the longitudinal length of the overlapping part of the indicator 10 is preferably not more than 20%, more preferably 5% or less of the entire longitudinal length (100%) of the moisture indicator 10 so that the distinguishability of indicator 10 does not deteriorate. The overlapping part of the indicator 10 can be distinguished from the elements 35 of the picture due to the fact that it is a linear part in the plan view and it changes color when in contact with water.

The remaining elements forming the diaper 1 can be made of any materials traditionally known in the art. The topsheet 2 may be formed from a liquid-permeable sheet, such as a water-wettable nonwoven. The absorbent core 40 may be a collection of fibers that is formed from hydrophilic fibers, such as synthetic fibers, to which hydrophilic properties are imparted by a hydrophilicity improver, and which may have absorbent polymer particles held therein. The core wrapping sheet 41 (41a and 41b) covering the absorbent core 40 may be formed from liquid-permeable sheets such as paper (e.g., sanitary paper), various types of nonwoven fabric and perforated film. The elastic elements 51, 61 and 71 may be made of various elastomeric materials.

The moisture permeable sheet 30 forming the bottom sheet 3 may be formed of a polymer film having pores passing through it through in the direction of its thickness. Such a polymer film may be made of polyethylene, polypropylene or a similar polymer. The nonwoven sheet 31 forming the bottom sheet 3 can be formed, for example, from a nonwoven fabric of a spunbond production method, a nonwoven fabric obtained by the aerodynamic method from a melt, a nonwoven fabric with an SMS structure: a layer obtained by a spunbonded production method (S - spunbonded), - a layer obtained by the aerodynamic method from a melt (M - melt-blown), - a layer obtained by a spinneret method of production (S) of a non-woven material obtained by the aerodynamic method of forming canvas, a non-woven material, obtained hydro-weaving, or non-woven material obtained by pneumatic laying. The bottom sheet 3 only as a whole must be impervious to liquids, so that each of the moisture-permeable sheet 30 and the sheet 31 of nonwoven material does not always have to be impervious to liquids.

As shown in FIGS. 1 and 2, a linear moisture indicator 10 including coated zones 11S and 12S (zones coated with an agent that changes color upon contact with water) is provided between the bottom sheet 3 and the absorbent element 3, in particular between the moisture-permeable sheet 30 and the sheet for wrapping the core so that it extends in the longitudinal direction X, covering at least the crotch part B and the back part C. As shown in figures 1 and 2, at least a portion of the indicator 10, located in the crotch portion C, continues continuously in the longitudinal direction X with the same width (dimension in the transverse direction Y). In this embodiment, the indicator 10 is located in the diaper part 1, the middle in the transverse direction Y, and covers not only the crotch part C and the back part C, but also the front part A. The longitudinal ends 10a and 10c of the indicator 10 are formed respectively by zones 11S and 12S c coated. Zones 11S and 12S are formed by applying a color-changing agent to the skin-facing side of the moisture-permeable sheet 30 or to the non-skin-facing side of the core wrapping sheet 41b.

One of the distinguishing features of the diaper 1 in accordance with this embodiment is that, as shown in FIG. 1, the indicator 10 has high visibility parts 11 and 12 and a less visible part 13 in the zone 10P extending from its longitudinal end 10c , and located in the back of C, to its longitudinal center and located in the crotch part B (in the center of the diaper 1 in the longitudinal direction X) (hereinafter referred to as the “back zone 10P”). The less visible part 13 is less visible (or has lower visibility) compared to the rest of the indicator 10 (i.e., parts 11 and 12 with high visibility) after the color-changing agent changes color. Highly visible parts 11 and 12 have higher visibility after a color change compared to the less visible part 13. In this embodiment, less visible parts 13 and high visibility parts 11 and 12 are provided only in the rear zone 10P, but not in the remaining zones indicator 10. In the sense used in this document, the expression “visibility after the color-changing agent changes color” or “visibility after color change” means the visibility or visibility of the indicator 10 visible through the bottom sheet 3 (that is, through moisture permeable sheet 30 and the nonwoven fabric 31) on the outer side of the diaper 1 to the naked eye. Parts 11 and 12 with high visibility are located next to each other in the longitudinal direction X, while the less visible part 13 is located between them. Part 11 with high visibility is closer to the longitudinal end 1a located in the front part A of the diaper 1, the less visible part 13, and part 12 with high visibility is closer to the longitudinal end 1c located in the rear part C of the diaper 1, the less visible part 13. Parts with high visibility will also be called “parts with high visibility located on the front side” and “parts with high visibility located on the back side”, respectively.

In this embodiment, the less visible portion 13 is formed from the uncoated area 13A, that is, the area that is not covered by the color changing agent, over the entire width of the indicator 10 in the transverse direction Y. Therefore, if you look at the diaper 1 from its outside for inspection indicator 10 through the bottom sheet 3 (i.e., through the moisture-permeable sheet 30 and the nonwoven sheet 31), then the less visible part 13, which is the uncoated area 13A, will always look like a part with a color that is the same as the background color (white in this varia the implementation) of the lower sheet 3 (i.e., a laminate consisting of a moisture-permeable sheet 30 and a sheet 31 of nonwoven material). The uncoated area 13A has the same length L (see FIG. 1) in the longitudinal direction X over the entire length in the transverse direction Y.

In this embodiment, the high visibility portions 11 located on the front side include a plurality of linear (elongated rectangular) zones (three linear elongated rectangular zones) 11S with a coating, each of which extends in the longitudinal direction X. A plurality of zones 11S with a coating have the same size and are arranged in a certain order in the middle in the transverse direction zone of the diaper 1 at equal intervals in the transverse direction Y, while both ends thereof, opposite in the longitudinal direction, are grown Nena. Likewise, high visibility zones 12 located on the rear side include a plurality of linear (elongated rectangular) zones (three linear elongated rectangular zones) 12S with a coating, each of which extends in the longitudinal direction X. Many of the zones 12S with a coating have the same size and are arranged in a certain order at equal intervals in the transverse middle region of the diaper 1, while both of their ends, opposite in the longitudinal direction, are aligned. Coated zones 11S and coated zones 12S have the same width (transverse dimension Y). Thus, the number of coated zones 11S forming high visibility zones 11 located on the front side and the number of coated zones 12S forming high visibility zones 12 located on the rear side are equal, and one coated zone 11S forming a high visibility zone 11 located on the front side and one coated area 12S forming a high visibility zone 12 located on the rear side are in the same places in the transverse direction Y.

As shown in FIG. 1, the indicator 10 of this embodiment includes a high visibility portion 11 located on the front side and including a plurality of (three) coated zones 11S that form the front end longitudinal end 10a of the indicator 10 and continue in the longitudinal direction with coverage of the crotch part B and the front part A, and part 12 with high visibility, which is located on the rear side and which forms the longitudinal end 10c of the indicator 10 located on the rear side. The number of zones ( When zone) 12S coated forming part 12 with high visibility disposed from the rear part, the same as the number of zones 11S coated forming part 11 with high visibility, disposed at the front portion. Coated areas 12S are formed such that one coated area 12S is extended over one longitudinally coated area 11S. The high visibility part 11 (coated zone 11S) located on the front side and the high visibility part 11 (coated zone 12S) located on the rear side are provided with a predetermined interval between them along the longitudinal direction, and the interval between them forms less visible portion 13 formed from uncoated zone 13A.

As described, a less visible portion 13 (uncoated area 13A), which has lower visibility after a color change compared to the rest of the indicator 10 coated with a color-changing agent, is provided in the rear zone 10P of the indicator 10, in particular close to the rear side of the longitudinal end 10c of the indicator 10. This location helps the observer to find out about the color change of the coated zones and the extent of the “spread” of the zones with the changed color (find out the location of the liquid) easier and more accurately than in the case and similar, less visible part is not provided, i.e. when the coated zones continuously extend in a longitudinal direction X with the same width (the same length in the transverse direction Y), as will be explained in more detail.

When a body fluid, such as urine, is released while wearing a diaper 1, the portion of indicator 10 that first comes in contact with the fluid and changes color is usually located in the longitudinal center of the coated zones 11S or near the center corresponding to the longitudinal center of the crotch part B or a zone near it (the site of discharge). In subsequent repeated selections, the color change “spreads” outward in the longitudinal direction X, and finally the coated areas 11S and 12S forming indicator 10 completely change color. This indicates that the absorbency of the diaper 1 has been fully utilized, that is, the diaper no longer serves to absorb and retain urine and needs to be replaced. In addition, the back portion C of the diaper 1 is a “signaling” point about the time of the change of the diaper, since it is squeezed while worn and leaks even with a small amount of fluid released. Therefore, it is important for the caregiver (for example, the mother when the baby is the carrier) to frequently check the status of indicator 10 in the back of C. The caregiver usually decides to change the diapers before the longitudinal end of part 12 with high visibility (coated areas 12S), which forms the longitudinal end 10c of the indicator 10 located on the rear side, will change color.

If a less visible portion 13 is not provided, that is, the coated zones continuously extend in the longitudinal direction of the diaper with the same width, similar to the usual moisture indicator of the type in question, in particular when the wearer wears the garment over the diaper so that the person carrying care, should quickly check the indicator through the gap between the garment and the diaper, it will be difficult for the carer to check if the indicator changes color. Even if the caregiver handles this, it will still be difficult for him to accurately determine the degree of moisture distribution (the location of the boundary between the part with the changed color and the part with the unchanged color). As a result, changing diapers at the right time will be difficult.

On the contrary, when the indicator 10 has a less visible part 13 (coated part 13A), which always has the same color as the background color (white) of the bottom sheet 3 in the rear zone 10P (next to the longitudinal end of the indicator 10c located on the rear side) 10), as in this embodiment, especially when the color change reaches an area near the less visible part 13, the caregiver will easily see that there is a color change due to the contrast between the white, less visible part 13 and the adjacent part with a changed color, to This is non-white even when the caregiver has to check the indicator 10 quickly through the gap between the diaper 1 and the outer garment. In particular, in the case when the color change reaches part 12 with high visibility (coated area 12S) located on the rear side, which is closer to the longitudinal end 1c of the diaper 1 located on the rear side, than the less visible part 13, by comparing with the less visible part 13 adjacent to it, the degree of color change can be easily seen, and the degree of moisture distribution (the boundary between the part with the changed color and the part with the same color) can be seen accurately. Thus, the diaper 1 of this embodiment allows the caregiver to easily and accurately check the presence of moisture in the rear part C and the distribution of the allocated fluid through the indicator 10.

In order to guarantee the effects of the presence of a less visible part 13, in particular, in order to help the caregiver, it is easier and more accurate to see the place where the fluid has reached, it is preferable that the less visible part 13 be provided within the area continuing at a distance of 50 mm, more preferably 30 mm, inward in the longitudinal direction X from the indicator 10 located on the rear side of the longitudinal end 10c (the longitudinal end of the high visibility portions 12 (coated areas 12S) located the rear side and located closer to the longitudinal end 1c of the diaper 1 located on the rear side than to the other end).

If the less visible part 13 of the indicator 10 has a too small length L (see FIG. 1) in the longitudinal direction X, the observer may have difficulty recognizing the less visible part 13 from the outside of the diaper 1, and the observer may have the impression that high visibility parts 11 and 12 (coated zones 11S and 12S) are connected to each other to form an indicator 10 that is continuous in the longitudinal direction, which makes it impossible to obtain the above effects. On the contrary, if the length L is too long, then the high visibility parts 11 located on the front side and the high visibility parts 12 located on the rear side will be too far apart. The observer may not recognize that the visible parts 11 and 12 serve to indicate humidity as a whole. In this case, the effects discussed above will also not be obtained. Based on these considerations, the length L (in the longitudinal direction X) of the less visible portion 13 is preferably from 2 to 20 mm, more preferably from 5 to 15 mm.

Preferably, the high visibility portions 12 (coated areas 12S) located on the rear side and forming the longitudinal end 10c of the indicator 10 located on the rear side form a color after the color change that is more saturated than the color of the high visibility portions 11 (11S zones) coated or other areas with high visibility) located on the front side and opposite to the parts 12 with high visibility located on the back side, while the neighboring, less visible part 13 is located between them in longitudinal direction. Due to such a color change, the high visibility portions 12 exhibit improved visibility after the color change to provide further enhanced effects from the presence of the less visible part 13, in particular the effect of assisting the caregiver to more easily and accurately recognize the spread of color change in indicator 10 (the place to which the allocated fluid has reached).

When the color of the high visibility parts 12 (coated areas 12S) located on the rear side formed after the color change is more saturated than the color of the high visibility parts 11 (coated areas 11S or other high visibility areas) arranged with of the front side, as proposed, the color of the parts 12 formed after a color change with high visibility differs from the background color of the moisture-permeable sheet 30 and the non-woven sheet 31 (white in this embodiment) and can be recognized from the outside oron the diaper 1 through the backsheet 3 (liquid-pervious sheet 30 and the sheet 31 of nonwoven material). In this case, it is preferable that the color formed after the color change of the parts 12 with high visibility located on the rear side has a greater difference in brightness from the color of the bottom sheet 3 (moisture-permeable sheet 30 and the sheet 31 of non-woven material) compared with the color formed after the color change parts 11 with high visibility located on the front side. In particular, it is preferable that the difference (ΔL12) in brightness L * between the rear-mounted portions 12 with high visibility after color change and the lower sheet 3 is greater than the difference (ΔL12) in brightness L * between the front-mounted portions 11 with large visibility after discoloration and the bottom sheet 3. This structure helps a caregiver, such as a mother, more easily and accurately obtain important information regarding the fact that a body fluid, such as urine, has been excreted. To obtain this advantage in a more specific way, it is preferable that the difference between ΔL12 and ΔL11, ΔL12 - ΔL11 is 6 or more, more preferably from 9 to 15. The brightness L * is measured using a colorimeter in accordance with the method described later.

The color formed after the color change of the high visibility parts 12 (coated areas 12S) located on the rear side can be made more saturated than the color of the other high visibility parts 11 (coated areas 11S), for example, by increasing the amount of agent changing the color to be applied per unit area, namely, changing the coating thickness of the agent to form parts 12 with high visibility (coated areas 12S), compared with the amount of color changing agent to be applied to the images high visibility parts 11 (coated zones 11S). The ratio of the amount of color changing agent forming part 12 with high visibility (coated zone 12S) per unit area to the amount of color changing agent forming part 11 with high visibility (coated zone 11S) per unit area is preferably from 1 , 2 to 4, more preferably from 1.5 to 3. The amount of color changing agent applied to form highly visible parts 12 (coated zones 12S) is preferably from 12 to 50 g / m ² , more preferably from 15 to 40 g / m ² .

The effects obtained due to the presence of a less visible part 13 can also be enhanced by creating an appropriate printed pattern (pattern elements 35) to be applied to the bottom sheet 3 (moisture-permeable sheet 30 or non-woven sheet 31). In particular, to further enhance the effects of the presence of the less visible portion 13 described above, it is preferable that the number of pattern elements 35 per unit area (print density) be less in the region extending backward from the indicator 10 to the longitudinal end located on the rear side 1c of the diaper 1, namely, in the shaded part of the bottom sheet 3 (see FIG. 1), which will be called hereinafter the zone located behind the indicator, than in the rest of the bottom sheet 3. This design solution echivaet improved visibility of the indicator 10, particularly portions 12 with high visibility (12S coated zones) adjacent to the area located behind with respect to the indicator, which provides a further improvement in the above-described effects due to the presence of at least the visible part 13.

To further guarantee the above effects, the ratio of the number of elements in the 35 pattern per unit area of the zone located behind the indicator to the number of elements in the other zone of the bottom sheet 3 (moisture-permeable sheet 30) is preferably from 0 to 0.8, more preferably from 0.2 to 0.5.

For the same reasons, in order to improve the visibility of the coated areas 12S, it is advisable that no print (no pattern elements 35 in this embodiment) be applied to the area located behind the indicator on the back sheet 3 (moisture-permeable sheet 30 in this embodiment implementation).

To take full advantage of the indicator 10, in order to thereby obtain effects associated with the presence of a less visible area 13, even with greater certainty, the size of each part of the indicator 10 is preferably such.

The length of the indicator 10 in the longitudinal direction X (the maximum length of the indicator 10, including parts 11 and 12 with high visibility and less visible part 13, in the longitudinal direction X) is preferably from 50% to 90%, more preferably from 55% to 75% of the maximum length of the absorbent element 4 in the longitudinal direction X.

The width (transverse dimension Y) of each coated zone 11S forming the high visibility portions 11 located on the front side is preferably 1 to 10 mm, more preferably 1.25 to 5 mm. The same applies to the width (lateral dimension Y) of each coated area 12S forming the high visibility portions 12 located on the rear side.

The number of coated zones 11S forming the high visibility portions 11 located on the front side may be one, or, as in this embodiment, may be more than one. In the latter case, this number is preferably from 2 to 6, more preferably from 3 to 5. The same applies to the number of coated zones 12S forming the high visibility portions 12 located on the rear side.

Next, an agent that changes color upon contact with water will be described, namely, a color changing agent that forms indicator 10 (coated zones 11S and 12S). A color-changing agent is a hydrophilic composition containing a color-changing substance that visually changes upon contact with water. The composition may further comprise an adhesive substance functioning as an adhesive. That is, indicator 10 can serve not only as an indication “signaling” to the caregiver (for example, mother) that the body emits fluid, such as urine, from the carrier (for example, the baby), but also as a means fastening, providing fastening of the bottom sheet 3 and the absorbent element 4.

As an example of a substance that changes color and contained in the tool (hydrophilic composition) that changes color, you can cite the pH indicator. The pH indicator to be used is selected according to the type of absorbent article to which the indicator 10 is applied. In the case of a disposable diaper, as in this embodiment, it is preferable to use a pH indicator that changes color upon contact with urine. For example, a pH indicator is preferred that changes color at a pH of 3 to 7, including bromophenol blue, methyl orange, alizarin S, bromocresol green, methyl red, bromocresol purple and resazurin. Preferred, exemplary color-changing substances (pH indicators) for use in the utility model include bromocresol green, bromocresol purple, and resazurin. When using these pH indicators, the color of indicator 10 (zones 11S and 12S coated) before the color change (color before contact with water) is in the yellow to orange region, and after the color change, the color is in the green to magenta region. The pH indicators described above can be used as color-changing substances in parts 11 and 12 with high visibility. In the case where a less visible area 13 is formed by using a color-changing substance, the described pH indicators can be used.

The adhesive substance which may be contained in the color-changing agent (hydrophilic composition) preferably has hydrophilicity for reasons related to compatibility with the color-changing substance. An example of such an adhesive is a hydrophilic polymer, which serves as an adhesive to bond the lower sheet 3 (moisture-permeable sheet 30) and the absorbent element 4 (core wrapping sheet 41b), at least until it contacts with water. Examples of the hydrophilic polymer include polyethylene glycol (PEG), polypropylene glycol (PPG), polyvinyl alcohol (PVA), polyamide and a vinyl pyrrolidone homopolymer. The substance described above can be used as an adhesive substance in parts 11 and 12 with high visibility. In the case where a less visible area 13 is formed by using an adhesive substance, the described substances can be used.

Both the color present before the color change and the color formed after the color change of the indicator 10 (colors of the coated zones 11S and 12S) usually differ from the background color of the moisture-permeable sheet 30 and the non-woven sheet 31 (white in this embodiment) and are distinguishable from the outside of the diaper 1 through the bottom sheet 3 (moisture-permeable sheet 30 and non-woven sheet 31). Although the colors of the indicator 10 that are present before the color change and formed after the color change are not particularly limited, provided that they are distinguishable from the outside of the diaper 1, it is preferable that the brightness difference between the color of the indicator 10 and the color of the lower sheet 3 ( the laminate from the moisture-permeable sheet 30 and the non-woven sheet 31) was larger after the color change than before the color change. In other words, it is preferable that the difference (ΔLa) in brightness between the indicator 10 after the color change and the bottom sheet 3 is greater than the difference (ΔLa) in brightness between the indicator 20 before the color change and the bottom sheet 3. This structure helps the carer (for example , mothers), it’s easier and more accurate to get important information about the release of a fluid released by the body, such as urine.

To obtain this advantage in a more specific way, it is preferable that the difference between ΔLa and ΔLb, ΔLa-ΔLb is 10 or more, more preferably 12 to 28. ΔLa is preferably 10 to 40, more preferably 16 to 32, and ΔLb preferably from 0 to 10, more preferably from 6 to 8. The brightness L * of the indicator 10 after the color change is preferably from 64 to 84, more preferably from 70 to 80, and the brightness L * of the indicator 10 before the color change is preferably from 86 to 100, more preferably 92 up to 98. The term "brightness L *", used for the colors of the indicator 10 before and after the color change, means the value for the indicator 10 itself, defined without the bottom sheet 3.

The brightness L * is determined by using a colorimeter. In this utility model, the light reflected from the sample is measured using a NF333 hand-held spectrocolorimeter (trade name) supplied by Nippon Denshoku Industries Co., Ltd. and a light source C under the following conditions: viewing angle of 2 °, measurement geometry - 0/45 °, the beam diameter was 10 mm, and a stack of cardboard with a thickness of at least 5 mm was placed on the back of the sample.

Each of FIGS. 3 and 4 shows indicator modifications in accordance with a utility model. Figures 3 and 4 show only the outer contour of the diaper 1, while the remaining elements forming the diaper 1 are excluded to ensure ease of illustration. The description of these modifications will generally be limited by differences from the above-described first embodiment. Components similar to those in FIG. 1 are denoted by like reference numerals and will not be excessively described. The description of the first embodiment is accordingly applicable for modifications with exceptions noted hereinafter.

The indicator 10A shown in FIG. 3 (a) has a plurality of less visible parts (three less visible parts) 13, each of which is formed from an uncoated area 13A, in its rear zone 10A. In particular, there is a group of high visibility parts 14 located on the rear side, and a group of high visibility parts 15 located on the rear side between the group of high visibility parts 11 (coated zones 11S) located on the front side and forming on the front side, the longitudinal end 10a of the indicator 10A, and a group of high visibility parts 12 (coated areas 12S) located on the rear side and forming the longitudinal end 10c of the indicator 10A located on the rear side, with the near parts 14 e to parts 11 than parts 15. These groups of parts 11, 14, 15 and 12 with high visibility are arranged in a certain order in the longitudinal direction with a given interval. Each interval between adjacent groups of parts with high visibility is an uncoated area 13A (less visible part 13). Many less visible parts (three less visible parts) 13 have the same length in the longitudinal direction X (corresponding to the length L shown in FIG. 1). Each of the group of high visibility parts 14 located on the rear side and the group of high visibility parts 15 located on the back side consists of a plurality of (three) linear coated zones extending in the longitudinal direction X, similar to the group of parts 12 c high visibility located on the back side. Many coated areas are of the same size and arranged in a certain order at equal intervals in the diaper 1 region, the average in the transverse direction, while both of their opposite ends in the longitudinal direction are even in the transverse direction Y. Each of the group of parts 14 with high visibility, located on the rear side, and the group of parts 15 with high visibility located on the rear side consists of the same number of coated areas as the group of parts 12 with high visibility located on the back side. One coated zone 12S forming one high visibility zone 12 located on the front side, one coated zone forming one high visibility zone 14 located on the rear side and one coated zone forming one high visibility zone 15 located on the rear side are in the same places in the transverse direction Y.

As shown in FIG. 3 (a), the indicator 10A includes a high visibility part 11 located on the front side and including three coated zones 11S that form the longitudinal end 10a of the indicator 10A located on the front side and extend longitudinally direction, covering the crotch portion B and the front part A, and the high visibility part 12 (coated areas 12S), which is located on the rear side and forms the longitudinal end 10c of the indicator 10A located on the rear side. The number of coated zones 12S forming a high visibility part 12 located on the rear side is three and is the same as the number of coated zones 11S forming the high visibility part 11 located on the front side. Coated areas 12S for forming a high visibility portion 12 located on the rear side are formed such that one coated area 12S is located on the extension of one longitudinally coated area 11S. Between the three coated areas 11S and the three coated areas 12S, there are coated areas coated with a color-changing agent and forming other high visibility portions 14 and 15 located on the rear side. The coated areas coated with the color changing agent are arranged in a specific order so that the coated areas coated with the color changing agent are arranged at a predetermined interval in the longitudinal direction X between each coated area 11S and the coated area 12S, which is located on the extension of each area 11S with the coating in the longitudinal direction X. The interval between the adjacent two of the parts 11, 14, 15 and 12 with high visibility ensures the formation of a less visible part 13, consisting of the area 13A without coating. All less visible parts 13 (intervals) have the same length in the longitudinal direction X. Zones 12 with high visibility (coated zones 12S) located on the rear side and other zones 14 and 15 with high visibility located on the rear side (zones with coated, forming other zones 14 and 15 with high visibility, located on the rear side), have the same size in plan view and are located in the diaper 1 part, the average in the transverse direction, with equal intervals in the transverse direction Y, while both of them are opposite longitudinal to they are even.

In the indicator 10B shown in FIG. 3 (b), the less visible portion 13 is not only comprised of an uncoated area and includes a coated area 13S. When plotting an imaginary straight line Q intersecting the indicator 10B anywhere and extending in the transverse direction Y, the sum of the lengths of the segments of the line Q covering the zones (11S, 12S, or 13S) with the coating is considered as the width of the coating at that location. The less visible portion 13 of the indicator 10B has a smaller coating width than parts 11 and 12 with high visibility. In other words, when an imaginary straight line Q is drawn so that it crosses the indicator 10B in the transverse direction Y, the sum of the lengths of the sections on which the imaginary straight line Q drawn in the less visible part 13 overlaps the coated area (coated area 13S) ( that is, the width of the coating) is less than the sum of the lengths of the overlap zones between the imaginary straight line Q drawn in high visibility parts 11 or 12 and the coated areas (coated areas 11S or 12S) (i.e., the width of the coating).

The high visibility portions 11 and 12 of the indicator 10B consist respectively of a plurality (of three) coated areas 11S and 12S that are spaced at a predetermined interval in the transverse direction Y. In contrast, the less visible portion 13 of the indicator 10B contains only one area 13S with a coating, the length of which in the transverse direction Y is equal to the length of the zones 11S and 12S with the coating in the transverse direction. That is, the less visible part 13 has a smaller number of coated areas compared to parts 11 with high visibility and parts 12 with high visibility and, accordingly, has a smaller width of the coating. The coated indicator zone 13B of the indicator 10B has a straight line shape and is similar to the connection between a part of a plurality of (of three) coated zones 11S forming high visibility portions 11 and a part of a plurality of (of three) coated zones 12S forming a part 12c high visibility, in particular, to the connection connecting the middle of the coated zones 11S and the middle of the coated zones 12S. The lateral length (width) of the coated zone 13S is equal to the transverse length of the coated zones 11S and 12S.

As shown in FIG. 3 (b), the indicator 10B includes a high visibility portion 11 located on the front side and including three coated zones 11S that form the longitudinal end 10a of the indicator 10B located on the front side and extend longitudinally direction, covering the crotch portion B and the front part A, and the high visibility part 12 (coated areas 12S), which is located on the rear side and forms the longitudinal end 10c of the indicator 10B located on the rear side. The number of coated zones 12S forming a high visibility part 12 located on the rear side is three and is the same as the number of coated zones 11S forming the high visibility part 11 located on the front side. Coated areas 12S for forming a high visibility portion 12 located on the rear side are formed such that one coated area 12S is located on the extension of one longitudinally coated area 11S. Between the three coated areas 11S and the three coated areas 12S, a less visible portion 13 is formed including the coated area 13S and the uncoated areas. The coated zone 13S contained in the less visible portion 13 is a joint that connects the middle of the coated zones 11S forming the high visibility portions 11 located on the front side and the middle of the coated zones 12S forming the large part 12 visibility, located on the back side and has the same width as the connected parts. The uncoated areas contained in the less visible portion 13 are located on opposite sides of the joint in the transverse direction Y and have the same length in the longitudinal direction X.

Since the less visible part 13 of the 10B indicator has a color changing agent (an agent that changes color when in contact with water), although not with a coating width equal to the coating width in parts 11 and 12 with high visibility, the visibility of the coated zone (zone 13S coated) is not null in contrast to the less visible portion 13 formed from the uncoated area 13A. However, the less visible portion 13 has lower visibility compared to the high visibility portions 11 and 12, and in some cases appears to have the same color as the background color (white) of the bottom sheet 3 (laminate of the breathable sheet 30 and sheet 31 nonwoven fabric). Therefore, indicator 10B provides the same effects and advantages as those provided by indicators 10 and 10A.

To guarantee the effects of the less visible portion 13 containing the coated area coated with a color changing agent (coated area 13S), the width of the coating of the color changing agent relative to an imaginary straight line Q (corresponding to the length of one transverse coated coating zone 13S Y in the case of the embodiment shown in FIG. 3 (b)) is preferably 5 mm or less, more preferably 3 mm or less.

The less visible portion 13 of the indicator 10C shown in FIG. 3 (c) does not only consist of an uncoated area, but includes a coated area 13S similarly to the less visible part of the indicator 10C of FIG. 3 (b). The less visible portion 13 of the indicator 10C includes as many coated areas (three zones) 13S as there are coated areas 11S, 12S in the high visibility portions 11 and 12. Many (of the three) coated zones 13S have a one-on-one relationship with a plurality of (of three) coated zones 11S and a plurality of (of three) coated zones 12S, so that each coated zone 13S serves as a connection connecting one of coated zones 11S and one of the coated zones 12S, which are in the same place in the transverse direction Y. Each of the three coated zones 13S, forming the less visible portion 13, has a smaller width than both coated zones 11S and 12S of parts 11 and 12 with high visibility, connected by it. Thus, the less visible part 13 of the indicator 10C has a smaller coating width of the color-changing agent relative to the imaginary straight line Q compared to the groups of parts 11 and 12 with high visibility located on the sides of the less visible part 13, opposite in the longitudinal direction. As a result, the less visible portion 13 has a relatively low visibility or distinguishability.

As shown in FIG. 3 (c), the indicator 10C includes a high visibility portion 11 located on the front side and including three coated zones 11S that form the longitudinal end 10a of the indicator 10C located on the front side and extend longitudinally direction, covering the crotch portion B and the front part A, and the high visibility part 12 (coated areas 12S), which is located on the rear side and forms the longitudinal end 10c of the indicator 10C located on the rear side. The number of coated zones 12S forming a high visibility part 12 located on the rear side is three and is the same as the number of coated zones 11S forming the high visibility part 11 located on the front side. Coated areas 12S for forming a high visibility portion 12 located on the rear side are formed such that one coated area 12S is located on the extension of one longitudinally coated area 11S. Between the three coated areas 11S and the three coated areas 12S, a less visible portion 13 is formed including as many coated areas (three zones) 13S as the high visibility portions 11 and 12. The three coated areas 13S contained in the less visible portion 13 are in one-to-one relationship with the three coated areas 11S forming the high visibility part 11 located on the front side and the three coated areas 12S forming the high visibility part 12 located on the rear side, so that each coated area 13S serves as a connection connecting one of the coated areas 11S of the high visibility part 11 located on the front side and one of the coated areas 12S of the high visibility part 12, is located constant from the back side, which are in the same position in the transverse direction Y, wherein the compound has a smaller width in comparison with both 11S and 12S bands coated connectable to them.

In the indicator 10D shown in FIG. 4 (a), the less visible portion 13 not only consists of an uncoated area, but includes a coated area 13S similarly to the less visible portion 13 of the indicator 10B of FIG. 3 (b). In the less visible portion 13 of the indicator 10D, the width of the coating of the color-changing agent relative to an imaginary straight line Q varies with location. More precisely, the less visible part 13 has a “sub-part containing one coated area 13S” located closer to the front with high visibility part 12 and a “sub-part containing two coated areas 13S” located closer to part 12 with high visibility located on the rear side, while the two parts do not overlap in the longitudinal direction X. In the less visible area 13 of the indicator 10D, the coated area 13S of the “part containing one coated area 13S” (the part located closer to zone 11S with coated) formed as a continuation of the central zone of the plurality of (three) 11S coated zones forming part 11 with high visibility, placed on the front side in the direction of the portion 12 with high visibility, located on the rear side. The coated areas 13S of the “sub-area containing two coated areas 13S” (the portion closer to the coated area 12S) are formed as a continuation of the two coated areas 12S, which are transverse outer zones, of a plurality (of three) areas 12S coated in the direction of the parts 11 with high visibility located on the front side. Both “the sub-part containing one coated zone 13S” and the “sub-part containing two coated zones 13S”, which form the less visible portion 13 of the indicator 10D, have a smaller coating width of the color-changing agent relative to an imaginary straight line Q along compared with parts 11 with high visibility and parts 12 with high visibility located on opposite sides of the less visible part 13 in the longitudinal direction X. As a result, the less visible part 13 has a relatively low visibility.

As shown in FIG. 4 (a), the indicator 10D includes a high visibility portion 11 located on the front side and including three coated areas 11S that form the frontal longitudinal end 10a of the indicator 10D and extend in the longitudinal direction, covering the crotch portion B and the front part A, and the high visibility part 12 (coated areas 12S), which is located on the rear side and forms the longitudinal end 10c of the indicator 10D located on the rear side. The number of coated zones 12S forming a high visibility part 12 located on the rear side is three and is the same as the number of coated zones 11S forming the high visibility part 11 located on the front side. Coated areas 12S for forming a high visibility portion 12 located on the rear side are formed such that one coated area 12S is located on the extension of one longitudinally coated area 11S. Between the three coated areas 11S and the three coated areas 12S, a less visible portion 13 is formed including the coated areas 13S and the uncoated area. The less visible part 13 has a certain width of the coating of the color-changing agent relative to an imaginary straight line Q drawn so that it intersects the less visible part 13 anywhere in the less visible part 13 (the sum of the lengths of the line segments Q that overlap with the coated zones 13S ), while the width of the coating varies depending on the location.

In more detail, that sub-section of the less visible portion 13, which is closer to the high visibility portions 11 located on the front side, consists of a coated zone 13S formed as a continuation of the middle zone of the three coated zones 11S forming the high visibility portions 11 located on the front side, in the direction of the high visibility part 12, located on the rear side, and from the uncoated areas located on opposite sides of the coated area 13S in the transverse direction Y. That subpart is the less visible part 13, which located closer to the high visibility portions 12 located on the rear side, consists of two coated zones 13S formed as a continuation of the two coated zones 12S that are different from the middle zone of the three coated zones 12S forming the high visibility portions 12, located on the rear side in the direction of the high visibility parts 11 located on the front side and from the uncoated area located between the two coated areas 13S.

The indicator 10E shown in FIG. 4 (b) differs from the indicator 10 of FIG. 1 with respect to the shape of the plan view of the highly visible parts 12 located on the rear side and forming the longitudinal end 10c of the indicator 10E located on the rear side. Each of the plurality of (of three) coated zones 12S forming the high visibility portions 12 in the indicator 10E located on the rear side has a triangular shape (isosceles triangle shape) in a plan view. Each of the plurality of coated triangular zones 12S is positioned such that its apex is directed towards the high visibility portion 11 located on the front side, and its opposite side to the apex is facing the longitudinal end 1c of the rear portion C of the diaper 1. Width ( the lateral dimension Y) of each coated area 12S is gradually reduced in the direction of the frontal longitudinal end 1a.

As shown in FIG. 4 (b), the indicator 10E includes a high visibility portion 11 located on the front side and including three coated zones 11S that form the longitudinal end 10a of the indicator 10E located on the front side and extend longitudinally direction, covering the crotch portion B and the front part A, and the high visibility part 12 (coated areas 12S), which is located on the rear side and forms the longitudinal end 10c of the indicator 10E located on the rear side. The number of coated zones 12S forming a high visibility part 12 located on the rear side is three and is the same as the number of coated zones 11S forming the high visibility part 11 located on the front side. Coated areas 12S for forming a high visibility portion 12 located on the rear side are formed such that one coated area 12S is located on the extension of one longitudinally coated area 11S. Each of the coated areas 12S forming the three high visibility parts 12 located on the rear side has a triangular shape in a plan view and is positioned so that its apex is directed towards the high visibility part 11 located on the front side and its side, opposite to the apex, facing the longitudinal end 1c of the rear portion C of the diaper 1. The size of each coated area 12S in the transverse direction Y gradually decreases towards the longitudinal end 1a located on the front side. Between the three coated areas 11S and the three coated areas 12S having a triangular planar shape, a less visible portion 13 formed from the uncoated area 13A is formed. The less visible portion 13 (uncoated area 13A) has the same length in the longitudinal direction X.

The indicator 10F shown in FIG. 4 (c) differs from the indicator 10 in FIG. 1 with respect to the width of the coating of the color changing agent with respect to an imaginary straight line Q in high visibility portions 11 and 12 located on both sides less visible portion 13 in the longitudinal direction X. In the indicator 10F, the group of high visibility parts 12 forming the longitudinal end 10c of the indicator 10F located on the rear side has a wider coating width than the high visibility parts 11 (other high visibility parts), which located opposite the hour s 12 with high visibility is relatively less visible portion 13 adjacent in the longitudinal direction. In particular, the high visibility portions 11 of the indicator 10F located on the front side include three coated areas 11S, while the high visibility portions 12 located on the rear side include five coated areas 12S. A larger number of coated zones forming high visibility portions 12 located on the rear side, which exceeds the number of coated zones forming high visibility portions 11 located on the front side, provides a larger coating width of the color changing agent with respect to an imaginary straight line Q, as a result of which the coated zones of the color-changing agent in the high visibility portions 12 located on the rear side have relatively high distinguishability. Thus, the visibility after the color change of the high visibility portions 12 located on the rear side is improved, as a result of which additional enhanced effects from the presence of the less visible part 13 are provided, in particular, greater lightness and accuracy when checking the degree of propagation of the color change (places, to which the extracted fluid reaches) in indicator 10F.

As shown in FIG. 4 (c), the indicator 10F includes a high visibility portion 11 located on the front side and including three coated zones 11S that form the longitudinal end 10a of the indicator 10F located on the front side and extend longitudinally direction, covering the crotch portion B and the front part A, and the high visibility part 12 (coated areas 12S), which is located on the rear side and forms the longitudinal end 10c of the indicator 10F located on the rear side. The number of coated zones 12S forming the high visibility portion 12 located on the rear side is five and exceeds the number of coated zones 11S. Three of the five coated areas 12S, that is, the number of areas of the five coated areas 12S that is equal to the number of coated areas 11S, are located so that one coated area 12S is extended over one longitudinally coated area 11S, and the rest (the other two) are located on both sides of the three coated zones 11S. Between the three coated areas 11S and the three coated areas 12S, a less visible portion 13 formed from the uncoated area 13A is provided. The less visible portion 13 (uncoated area 13A) has the same length in the longitudinal direction X.

Despite the fact that the utility model has been described with reference to the options for its implementation, it should be understood that the utility model is not limited to these options for implementation, and various changes and modifications can be made in it. For example, the color (s) of the indicator before and / or after the color change may (may) vary in parts 12 with high visibility (in the coated areas 12S) forming the longitudinal end 10c of the indicator located on the rear side, and in other parts with a large visibility, located opposite the parts 12 with high visibility relative to the less visible part 13 adjacent to the parts 12 with high visibility in the longitudinal direction (which are parts 15 with high visibility in the case of the indicator 10A in figure 3 (a) or in other embodiments - frequent and 11 with high visibility, located on the front side).

While in the above embodiments, the bottom sheet 3 consists of two sheets, namely a moisture-permeable sheet 30 and a core wrapping sheet 31, it can be formed from one sheet or from more than two sheets. While in the above embodiments, the pattern elements 35 are printed on the non-skin side of the moisture-permeable sheet 30 (on the side facing the non-woven fabric sheet 31), they can be printed on the skin side (on the absorbent side element 4), or they can be printed on a sheet 31 of non-woven material or both on a moisture-permeable sheet 30 and on a sheet 31 of non-woven material. The shape of the individual elements 35 of the figure is not limited to points (circles) similar to those used in the previous embodiments, and may be cubic, oblong rectangular, rhombic, oval, polygonal, star-shaped and the like. Despite the fact that in the described embodiments, the implementation of all the elements 35 of the picture have the same shape, the picture elements having different shapes can be used in combination.

According to a utility model, the absorbent article is not limited to disposable diapers of the type disclosed, and can cover a wide range of products used to absorb fluids released from the human body, such as stretchable disposable diapers, sanitary napkins and sanitary pants.

The following paragraphs are considered to further describe the disclosed utility model (absorbent articles).

1. An elongated absorbent article comprising an absorbent element and a bottom sheet located on the non-skin side of the absorbent element, having a longitudinal direction corresponding to the front to back direction of the wearer, and a transverse direction perpendicular to the longitudinal direction, and having a front portion configured to wearing near the front of the carrier, a crotch portion configured to be worn near the crotch of the carrier, and a rear portion configured to be worn poison with the back side of the carrier, while the absorbent article has a moisture indicator between the bottom sheet and the absorbent element, while the humidity indicator contains coated areas coated with a color-changing agent that changes color upon contact with water and continues in the longitudinal direction so that at least they cover the crotch and the back,

while the portion of the humidity indicator located in the crotch portion continues continuously with the same width,

however, only the portion of the humidity indicator, continuing from located on the rear side of the longitudinal end of the humidity indicator to the longitudinal center of the crotch part, has a less visible part having lower visibility after color change compared to the rest of the humidity indicator, and part with high visibility, having higher visibility after a color change compared to the less visible part, while the part with high visibility is located on both sides of the less visible part in the longitudinal ION,

while the less visible part has one of the following configurations: (1) the less visible part contains an uncoated area that extends across the entire length of the moisture indicator in the transverse direction, while the uncoated area is a zone not covered by a color-changing agent, and (2 ) the less visible part has a smaller defined width of the coating of the agent that changes color, compared with the part with high visibility, while the width of the coating is set so that when drawing an imaginary straight line Q intersecting the moisture indicator, in any At the location of the moisture indicator, the sum of the lengths of the Q line segments that overlap with any coated area is considered the width of the coating of the color changing agent at that location.

2. The absorbent article of claim 1, wherein the less visible portion is located in an area extending at a distance of 50 mm inward in the longitudinal direction from the longitudinal end of the humidity indicator located on the rear side side.

3. Absorbent product according to paragraph 1 or 2, in which the less visible part has a length of from 2 to 20 mm in the longitudinal direction.

4. Absorbent product according to any one of paragraphs 1-3, in which the less visible part has a length of from 5 to 15 mm in the longitudinal direction.

5. Absorbent product according to any one of paragraphs 1-4, in which the part with high visibility, forming the longitudinal end of the humidity indicator located on the back side, forms a color after color change, more saturated compared to the color of the rest of the part with high visibility, opposite in relative to it is relatively less visible part adjacent to it in the longitudinal direction.

6. Absorbent product according to any one of paragraphs 1-5, in which the part with high visibility, forming the longitudinal end of the humidity indicator located on the rear side, has a larger coating width compared to the other part with high visibility located on the opposite side of the less visible part adjacent to it in the longitudinal direction.

7. The absorbent product according to any one of paragraphs 1-6, in which the bottom sheet has many picture elements printed with a color different from the background color of the bottom sheet,

the number of drawing elements per unit area is less in the area of the bottom sheet, extending backward from the moisture indicator to the absorbent product located on the rear side of the longitudinal end (in the area located behind the humidity indicator) than in the rest of the bottom sheet.

8. Absorbent product according to any one of paragraphs 1-6, in which the bottom sheet does not have printed drawings printed on the area located at the back with respect to the humidity indicator.

9. Absorbent product according to paragraph 7, in which the ratio of the number of drawing elements per unit area of the zone located behind the humidity indicator to the number of drawing elements per unit area of another zone of the lower sheet is from 0 to 0.8.

10. Absorbent product according to paragraph 7 or 9, in which the elements of the pattern are printed on the non-skin side or on the skin side of the moisture-permeable sheet forming the bottom sheet, the non-woven material sheet forming the bottom sheet, or both the moisture-permeable sheet and the sheet nonwoven fabric, and

individual elements of the figure have the shape of a dot (round), cubic shape, oblong rectangular shape, rhombic shape, oval shape, polygonal shape or star shape.

11. The absorbent product according to any one of paragraphs 1-10, in which the humidity indicator is located in the part of the absorbent product, the average in the transverse direction, and covers not only the crotch part and the back part, but also the front part,

the opposite longitudinal ends of the moisture indicator are formed by the respective coated zones, wherein the coated zones are formed by applying a color-changing agent on the skin-facing side of the moisture-permeable sheet forming the bottom sheet or on the skin-side of the sheet not facing the skin to wrap the core, covering the non-skin side of the absorbent core forming the absorbent element.

12. An absorbent article according to any one of paragraphs 1-11, wherein the moisture indicator preferably has a length in the longitudinal direction of 50% to 90%, more preferably 55% to 75% of the maximum length of the absorbent element in the longitudinal direction.

13. An absorbent product according to any one of paragraphs 1-12, wherein the coated zone in each highly visible portion preferably has a width in the transverse direction of 1 to 10 mm, more preferably 1.25 to 5 mm.

14. Absorbent product according to any one of paragraphs 1-13, in which the number of coated zones, forming parts with high visibility on each side of the less visible part, is preferably from 2 to 6, more preferably from 3 to 5.

15. Absorbent product according to any one of paragraphs 1-14, in which the difference (ΔLa) in brightness L * between the moisture indicator after the color change and the lower sheet is greater than the difference (ΔLa) in brightness L * between the moisture indicator before the color change and the lower sheet.

16. The absorbent product according to any one of paragraphs 1-15, in which the difference between ΔLa and ΔLb, ΔLa - ΔLb is preferably 10 or more, more preferably from 12 to 28,

ΔLa is preferably from 10 to 40, more preferably from 16 to 32, and

ΔLb is preferably from 0 to 10, more preferably from 6 to 8.

17. An absorbent product according to any one of paragraphs 1-16, in which the brightness L * of the humidity indicator after color change is preferably from 64 to 84, more preferably from 70 to 80, and

the brightness L * of the moisture indicator before the color change is preferably from 86 to 100, more preferably from 92 to 98.

18. An absorbent product according to any one of paragraphs 1-17, in which the color-changing agent is a hydrophilic composition comprising a color-changing substance that visually changes upon contact with water, and an adhesive material serving as an adhesive,

wherein the color-changing substance is selected from the group consisting of bromophenol blue, methyl orange, alizarin S, bromocresol green, methyl red, bromocresol purple and resazurin, and

the adhesive is selected from the group consisting of polyethylene glycol, polypropylene glycol, polyvinyl alcohol, polyamide and a vinyl pyrrolidone homopolymer.

19. An absorbent product according to any one of paragraphs 1-18, wherein the humidity indicator comprises a high visibility portion located on the front side and including a plurality of (three) coated areas that form the longitudinal end of the indicator located on the front side humidity and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the indicator located on the back side ora humidity and includes a coated region,

the number of coated zones (three zones) forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side is arranged so that one coated area forming the high visibility part located on the rear side is on the continuation of one coated zone forming the large visible part longitudinally positioned front side,

between the set of (of three) coated areas forming a high visibility part located on the front side and the plurality (of three) coated areas forming a high visibility part located on the rear side there are coated areas a color changing agent and forming another high visibility part located on the rear side, wherein the coated areas coated with the color changing agent are arranged in a specific order such that a plurality of (of two) coated areas coated with the agent, men color-coded, will be located at a predetermined interval in the longitudinal direction between each coated area forming a high-visibility part located on the front side and one coated area forming the high-visibility part located on the back side and located on the continuation of each coated zone, forming a part with high visibility, located on the front side, in the longitudinal direction, while this interval provides the formation of a less visible part containing zones uncoated, with less visible zone of the same length in the longitudinal direction,

while the part with high visibility, located on the back side, and this other part with high visibility, located on the back side, are the same size in plan view and are located in the part of the absorbent product, the average in the transverse direction, with equal intervals in transverse direction, while both of their opposite longitudinal ends are even.

20. An absorbent product according to any one of paragraphs 1-18, wherein the humidity indicator comprises a high visibility portion located on the front side and including a plurality of (three) coated areas that form the longitudinal end of the indicator located on the front side humidity and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the indicator located on the back side ora humidity and includes a coated region,

the number of coated zones (three zones) forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side is arranged so that one coated area forming the high visibility part located on the rear side is on the continuation of one coated zone forming the large visible part longitudinally positioned front side,

between the plurality of (of three) coated areas forming a high visibility part located on the front side and the plurality (of three) coated areas forming a high visibility part located on the rear side there is a less visible part containing coated area and uncoated area,

wherein the coated area of the less visible part is a connection connecting the part (middle) of the plurality (of three) of coated areas forming the part with high visibility located on the front side and the part (middle) of the plurality (of three) coated areas forming a high visibility part located on the rear side and the same width as the connected parts, and

however, the uncoated zone of the less visible part is located on both sides of the connection in the transverse direction and has the same length in the longitudinal direction.

21. Absorbent product according to any one of paragraphs 1-18, in which the humidity indicator contains a part with high visibility, located on the front side and including many (of three) coated areas that form the longitudinal end of the indicator located on the front side humidity and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the indicator located on the back side ora humidity and includes a coated region,

the number of coated zones (three zones) forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side is arranged so that one coated area forming the high visibility part located on the rear side is on the continuation of one coated zone forming the large visible part longitudinally positioned front side,

between the plurality of (of three) coated areas forming a high visibility part located on the front side and the plurality (of three) coated areas forming a high visibility part located on the rear side there is a less visible part containing as many coated areas as parts with high visibility located on the front side and the rear side,

however, many (of three) coated areas of the less visible part have a one-on-one relationship with many (of three) coated areas forming a part with high visibility located on the front side and a plurality (of three) coated areas, forming a part with high visibility, located on the back side, so that each coated area of the less visible part is a connection connecting one coated area of the part with high visibility located on the front side, and one has th zone covering portion with high visibility situated from the rear part, which are located in the same place in the transverse direction, wherein the compound is narrower as compared with both the coated zones connecting them.

22. Absorbent product according to any one of paragraphs 1-18, in which the humidity indicator contains a part with high visibility located on the front side and including many (of three) coated areas that form the longitudinal end of the indicator located on the front side humidity and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the indicator located on the back side ora humidity and includes a coated region,

the number of coated zones (three zones) forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side is arranged so that one coated area forming the high visibility part located on the rear side is on the continuation of one coated zone forming the large visible part longitudinally positioned front side,

between the plurality of (of three) coated areas forming a high visibility part located on the front side and the plurality (of three) coated areas forming a high visibility part located on the rear side there is a less visible part containing a coated area and an uncoated area, and

while the less visible part has a certain width of the coating of the agent that changes color relative to an imaginary straight line drawn so that it intersects the less visible part anywhere less visible part (the sum of the lengths of the segments of this line that overlap with any coated area), the width of the coating varies depending on the location.

23. The absorbent product according to paragraph 22, in which the less visible part has a subpart located closer to the part with high visibility located on the front side, and a subpart located closer to the part with high visibility located on the back side, the subpart located closer to the part with high visibility, located on the side of the front part, consists of a coated zone formed as a continuation of the middle zone of the set of (three) coated zones forming a part with high visibility, located on the front side, in the direction of the part with high visibility located on the side of the rear part, and from the uncoated area located on opposite sides of the coated area in the transverse direction, and the sub-part closer to the part with high visibility located on the side the back, consists of two coated areas and an uncoated area located between two coated areas, with two coated areas formed as a continuation of two of the many (of three) coated areas forming part of a large avail- able disposed from the rear, in the direction of a large part of the visibility situated at the front portion, the data two coated zones differ from the middle zone.

24. The absorbent product according to any one of paragraphs 1-18, wherein the humidity indicator comprises a high visibility portion located on the front side and including a plurality of (three) coated areas that form the longitudinal end of the indicator located on the front side humidity and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the indicator located on the back side ora humidity and includes a coated region,

the number of coated zones (three zones) forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side is arranged so that one coated area forming the high visibility part located on the rear side is on the continuation of one coated zone forming the large visible part longitudinally positioned front side,

however, many (of three) coated zones forming a part with high visibility located on the rear side are triangular in plan view, arranged so that the apex of the triangle is directed to the part with high visibility located on the front side, and the side opposite with respect to the apex is facing the longitudinal end of the rear of the absorbent article and has a transverse dimension gradually decreasing towards the longitudinal end located on the front side of the absorbent vayuschego products

wherein between the plurality of (of three) coated zones forming a part with high visibility located on the front side and the plurality (of three) of coated zones forming a part with high visibility located on the back side and having a triangular flat a shape, a less visible part is formed, formed from the uncoated area, while the less visible part has the same length in the longitudinal direction.

25. An absorbent product according to any one of paragraphs 1-18, wherein the humidity indicator comprises a high visibility portion located on the front side and including a plurality of (of three) coated areas that form the longitudinal end of the indicator located on the front side humidity and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the indicator located on the back side ora humidity and includes a coated region,

the number of coated zones (five zones) forming a high visibility part located on the rear side exceeds the number of coated zones (three zones) forming a high visibility part located on the front side, while some of the zones with coated, forming a part with high visibility, located on the back side, with the number of coated areas in this set, the same as the number of coated areas, forming a part with high visibility, located on the front side, are located so that one the coated zone forming the high visibility part located on the rear side is located on the continuation of one coated zone forming the high visibility part located on the front side in the longitudinal direction, and the other two other coated zones are on each the side of the group of many coated areas forming a part with high visibility, located on the back side,

between a plurality of (of three) coated zones forming a high visibility part located on the front side and a large number of (five zones) coated zones forming a high visibility part located on the rear side compared to the c high visibility, located on the front side, this less visible part is provided, formed from the uncoated area, while the less visible part has the same length in the longitudinal direction.

26. Absorbent product according to any one of paragraphs 1-25, which is a disposable diaper.

27. The absorbent article of claim 26, further comprising an upper sheet forming a skin side of the absorbent article, wherein the absorbent member is located between the upper sheet and the lower sheet,

wherein the upper sheet and the lower sheet protrude back and forth from the longitudinal ends of the absorbent element to form two waist parts and protrude laterally from both side edges of the absorbent element to form two leg parts, at least one of the waist parts has an elastic element for the waist, mounted in a stretched state between the upper sheet and the bottom sheet, and each of the parts for the legs has an elastic element for the legs, mounted in a stretched state between the upper sheet and the bottom sheet so that while wearing the absorbent article, the elastic elements for the waist and legs are pulled together to form waist and leg assemblies,

wherein the absorbent article further comprises two standing protective elements along the side portions of the upper sheet, wherein each standing protective element has an elastic element of the standing security element fixed in a stretched state along its unsecured end so that while wearing the absorbent article, the elastic element of the standing protective element shrinks to form standing assemblies.

Claims (27)

1. An elongated absorbent article comprising an absorbent element and a bottom sheet located on the non-skin side of the absorbent element, having a longitudinal direction corresponding to the front to back direction of the wearer, and a transverse direction perpendicular to the longitudinal direction, and having a front portion configured to wearing near the front of the carrier, a crotch portion configured to be worn near the crotch of the carrier, and a rear portion configured to be worn poison with the back of the carrier, wherein the absorbent article has a moisture indicator between the bottom sheet and the absorbent element, while the moisture indicator contains coated areas coated with a color-changing agent that changes color when in contact with water and continues in the longitudinal direction so that they at least cover the perineal part and back while the portion of the humidity indicator located in the crotch portion continues continuously with the same width, however, only the portion of the humidity indicator, continuing from located on the rear side of the longitudinal end of the humidity indicator to the longitudinal center of the crotch part, has a less visible part having lower visibility after color change compared to the rest of the humidity indicator, and part with high visibility, having higher visibility after a color change compared to the less visible part, while the part with high visibility is located on both sides of the less visible part in the longitudinal ION, while the less visible part has one of the following configurations: (1) the less visible part contains an uncoated area that extends across the entire length of the moisture indicator in the transverse direction, while the uncoated area is a zone not covered by a color-changing agent, and (2 ) the less visible part has a smaller, certain width of the coating of the color-changing agent compared to the part with high visibility, and the width of the coating is set so that when drawing an imaginary straight line Q intersecting the moisture indicator in any the location of the moisture indicator, the sum of the lengths of the Q line segments that overlap with any coated area is considered the width of the coating of the color-changing agent at that location. 2. Absorbent product according to claim 1, in which the less visible part is located within 50 mm, inward in the longitudinal direction from the moisture indicator located on the rear side of the longitudinal end. 3. The absorbent product according to claim 1, in which the less visible part has a length of from 2 to 20 mm in the longitudinal direction. 4. The absorbent product according to claim 1, in which the less visible part has a length of from 5 to 15 mm in the longitudinal direction. 5. The absorbent product according to claim 1, in which the part with high visibility, forming the longitudinal end of the humidity indicator located on the rear side, forms a color after color change that is more saturated than the color of the other part with high visibility, located opposite the less visible part, adjacent to it in the longitudinal direction. 6. The absorbent product according to claim 1, in which the part with high visibility, forming the longitudinal end of the humidity indicator located on the rear side, has a larger coating width compared to the other part with high visibility located on the opposite side of the less visible part adjacent to her in the longitudinal direction. 7. The absorbent product according to claim 1, in which the bottom sheet has many elements of the pattern printed on it with a color different from the background color of the bottom sheet, however, the number of drawing elements per unit area is less in the zone extending back from the moisture indicator to the absorbent article located on the rear side of the longitudinal end than in the rest of the lower sheet. 8. The absorbent product according to claim 7, in which the bottom sheet does not have printed drawings deposited on an area extending back from the moisture indicator to the absorbent article located on the rear side of the longitudinal end. 9. The absorbent product according to claim 7, in which the ratio of the number of pattern elements per unit area of the zone, extending back from the moisture indicator to the longitudinal end of the absorbent product located on the rear side, to the number of pattern elements per unit area of the remaining area of the lower sheet is from 0 up to 0.8. 10. Absorbent product according to claim 7 or 9, in which the bottom sheet contains a moisture-permeable sheet and a sheet of nonwoven material, drawing elements are printed on a non-skin side or a skin side of a moisture-permeable sheet, a sheet of nonwoven fabric, or both a moisture-permeable sheet and a sheet of nonwoven fabric, and individual elements of the figure have the shape of a dot (round), cubic shape, oblong rectangular shape, rhombic shape, oval shape, polygonal shape or star shape. 11. The absorbent product according to claim 1, in which the bottom sheet contains a moisture-permeable sheet, the absorbent element contains an absorbent core and a sheet for wrapping the core, covering the non-skin side of the absorbent core, the moisture indicator is located in the part of the absorbent product, the middle in the transverse direction, and covers not only the crotch part and the back part, but also the front part, the opposite longitudinal ends of the moisture indicator are formed by respective coated areas, each coated area being formed by applying a color-changing agent to the skin-side of the moisture-permeable sheet or to the skin-side of the sheet to wrap the core. 12. The absorbent product according to claim 1, in which the moisture indicator has a length in the longitudinal direction, comprising from 50% to 90% of the maximum length of the absorbent element in the longitudinal direction. 13. The absorbent product according to claim 1, in which the coated zone in each part with high visibility has a width in the transverse direction of 1 to 10 mm. 14. The absorbent product according to claim 1, in which the number of coated zones, forming parts with high visibility, located on each side of the less visible part, is from 2 to 6. 15. The absorbent product according to claim 1, in which the difference (ΔLa) in the brightness L * between the moisture indicator after the color change and the bottom sheet is greater than the difference (ΔLa) in the brightness L * between the humidity indicator before the color indicator and the bottom sheet. 16. The absorbent article of claim 15, wherein the difference between ΔLa and ΔLb, ΔLa-ΔLb is from 10 to 28, ΔLa is from 10 to 40, and ΔLb is from 0 to 10. 17. The absorbent product according to clause 15, in which the brightness L * of the humidity indicator after the color change is from 64 to 84, and the brightness L * of the humidity indicator before the color change is from 86 to 100. 18. The absorbent article of claim 1, wherein the color changing agent is a hydrophilic composition comprising a color changing substance that visually changes upon contact with water and an adhesive substance serving as an adhesive, wherein the color-changing substance is selected from the group consisting of bromophenol blue, methyl orange, alizarin S, bromocresol green, methyl red, bromocresol purple and resazurin, and the adhesive is selected from the group consisting of polyethylene glycol, polypropylene glycol, polyvinyl alcohol, polyamide and a vinyl pyrrolidone homopolymer. 19. The absorbent product according to claim 1, in which the humidity indicator contains a part with a high visibility located on the front side and including many coated areas that form the longitudinal end of the humidity indicator located on the front side and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the humidity indicator located on the back side and includes coated areas the number of coated zones forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side are arranged so that one coated area forming a high visibility part located on the rear side is located on a longitudinal extension of one coated area forming a large part spine disposed at the front part, Between the plurality of coated zones forming a high visibility part located on the front side and the plurality of coated zones forming a high visibility part located on the rear side, there are coated zones coated with a color changing agent and forming another a high visibility portion located on the rear side, wherein the coated areas coated with the color changing agent are arranged in a specific order such that a plurality of coated areas coated with the color changing agent will be located veins with a predetermined interval in the longitudinal direction between each coated zone forming a part with high visibility located on the front side and one coated zone forming a part with high visibility located on the back side and located on the continuation of each zone with a coating forming a part with high visibility, located on the front side, in the longitudinal direction, while this interval provides the formation of a less visible part containing an uncoated area, while less visible zone of the same length in the longitudinal direction, while the part with high visibility, located on the back side, and this other part with high visibility, located on the back side, are the same size in the top view and are located in the part of the absorbent product, average in the transverse direction, with equal intervals in the transverse direction, while both of their opposite longitudinal ends are even. 20. The absorbent product according to claim 1, in which the humidity indicator contains a part with a high visibility located on the front side and including many coated areas that form the longitudinal end of the humidity indicator located on the front side and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the humidity indicator located on the back side and includes coated areas the number of coated zones forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side are arranged so that one coated area forming the high visibility part located on the rear side is located on the continuation of one coated area forming the high visibility part laid on the front side, in the longitudinal direction, between the plurality of coated areas forming a high visibility part located on the front side side and the plurality of coated areas forming the high visibility part located on the rear side there is a less visible part containing the coated area and the uncoated area, wherein the coated zone of the less visible part is a connection connecting the part (middle) of the plurality of coated zones forming a high visibility part located on the front side and the part (middle) of the plurality of coated zones forming the high visibility part, located on the rear side and has the same width as the connected parts, and however, the uncoated zone of the less visible part is located on both sides of the connection in the transverse direction and has the same length in the longitudinal direction. 21. The absorbent product according to claim 1, in which the humidity indicator contains a part with high visibility located on the front side and including many coated areas that form the longitudinal end of the humidity indicator located on the front side and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the humidity indicator located on the back side and includes coated areas the number of coated zones forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side are arranged so that one coated area forming the high visibility part located on the rear side is located on the continuation of one coated area forming the high visibility part laid on the front side, in the longitudinal direction, Between the plurality of coated zones forming a high visibility portion located on the front side and the plurality of coated zones forming a high visibility portion located on the rear side there is a less visible portion containing as many coated zones as the portion with high visibility, located on the front side and on the rear side, however, many coated areas of the less visible part have a one-on-one relationship with a plurality of coated zones forming a high visibility part located on the front side and a plurality of coated zones forming a high visibility part located on the rear part, so that each coated area of the less visible part is a connection connecting one coated area of the high visibility part located on the front side and one coated area of the part with high visibility, located on the rear side, which are located in the same place in the transverse direction, while the connection is narrower compared to both coated areas connected by it. 22. The absorbent product according to claim 1, in which the humidity indicator contains a part with high visibility, located on the front side and includes many coated areas that form the longitudinal end of the humidity indicator located on the front side and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the humidity indicator located on the back side and includes coated areas the number of coated zones forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side are arranged so that one coated area forming the high visibility part located on the rear side is located on the continuation of one coated area forming the high visibility part laid on the front side, in the longitudinal direction, between the plurality of coated areas forming a high visibility part located on the front side side and the plurality of coated areas forming the high visibility part located on the rear side there is a less visible part containing the coated area and the uncoated area, and while the less visible part has a certain width of the coating of the agent that changes color relative to an imaginary straight line drawn so that it intersects the less visible part anywhere less visible part (the sum of the lengths of the segments of this line that overlap with any coated area), the width of the coating varies depending on the location. 23. The absorbent product according to item 22, in which the less visible part has a subpart located closer to the part with high visibility located on the front side and a subpart located closer to the part with high visibility located on the back side, wherein the sub part closer to the high visibility part located on the front side side contains a coated zone and an uncoated zone, wherein the coated zone is formed as a continuation of the middle zone from a plurality of coated zones forming a high visibility part located from the front side, in the direction of the part with high visibility, located on the back side, while the uncoated area is located on opposite sides of the coated area in the transverse direction, and the sub-part closer to the high visibility part located on the rear side side contains a coated zone and a non-coated zone, wherein the coated zone contains two coated zones formed as a continuation of two of the plurality of coated zones forming a large part visibility, located on the back side, in the direction of the part with high visibility, located on the front side, while these two coated areas are different from the middle zone, and the uncoated area is located between two zones with coated. 24. The absorbent product according to claim 1, in which the humidity indicator contains a part with high visibility located on the front side and including many coated areas that form the longitudinal end of the humidity indicator located on the front side and continue in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the humidity indicator located on the back side and includes coated areas the number of coated zones forming a high visibility part located on the rear side is the same as the number of coated zones forming a high visibility part located on the front side, while the coated zones forming the high visibility part located on the rear side are arranged so that one coated area forming the high visibility part located on the rear side is located on the continuation of one coated area forming the high visibility part laid on the front side, in the longitudinal direction, however, many coated areas forming a part with a high visibility, located on the rear side, have a triangular shape in a plan view, are located so that the top of the triangle is directed to the part with a high visibility, located on the side of the front part, and the side opposite with respect to the apex, facing the longitudinal end of the rear of the absorbent article, and have a transverse dimension gradually decreasing towards the longitudinal end of the absorbent located on the front side products however, between the plurality of coated zones forming a part with high visibility located on the front side and the plurality of coated zones forming a part with high visibility located on the back side and having a triangular flat shape, a less visible part formed from the uncoated area, while the less visible part has the same length in the longitudinal direction. 25. The absorbent product according to claim 1, wherein the humidity indicator comprises a high visibility portion located on the front side and including a plurality of coated areas that form the longitudinal end of the humidity indicator located on the front side and extend in the longitudinal direction, covering the crotch part and the front part, and the part with high visibility, which is located on the back side, forms the longitudinal end of the humidity indicator located on the back side and includes coated areas the number of coated zones forming a high visibility portion located on the rear side exceeds the number of coated zones forming a high visibility portion located on the front side, while the plurality of coated zones forming a high visibility portion located on the sides of the rear part, with the number of coated areas in this set being the same as the number of coated areas forming the high visibility part located on the front side, so that one coated area forming a part The high visibility region located on the rear side is located on the continuation of one coated area, forming the high visibility part located on the front side in the longitudinal direction, and the remaining coated zones are located on each side of the group of many zones with coated, forming a part with high visibility, located on the back side, between a plurality of coated zones forming a high visibility part located on the front side side and a large number of coated zones forming a high visibility part located on the rear side compared to the high visibility part located on the front side , a less visible portion formed from the uncoated area is provided, with the less visible portion having the same length in the longitudinal direction. 26. The absorbent product according to claim 1, which is a disposable diaper. 27. The absorbent article of claim 26, further comprising an upper sheet forming a skin side of the absorbent article, wherein the absorbent member is located between the upper sheet and the lower sheet, wherein the upper sheet and the lower sheet extend forward and backward from the longitudinal ends of the absorbent element to form a pair of waist parts and protrude laterally from both side edges of the absorbent element to form a pair of leg parts, wherein at least one of the waist parts has an elastic element for the waist fixed in a stretched state between the upper sheet and the lower sheet, and each of the leg parts has an elastic element for the legs fixed in a stretched state between the upper sheet and the lower sheet so that while wearing the absorbent article, the elastic elements for the waist and legs are pulled together to form respectively waist and leg assemblies, wherein the absorbent article further comprises two standing protective elements along the side portions of the upper sheet, wherein each standing protective element has an elastic element of the standing protective element fixed in a stretched state along its loose end so that while wearing the absorbent article the elastic element of the standing protective element shrinks to form standing assemblies.