MXPA96005937A

MXPA96005937A - Diap

Info

Publication number: MXPA96005937A
Application number: MXPA/A/1996/005937A
Authority: MX
Inventors: Sasaki Toru; Hisada Kenichi; Suekane Makoto
Original assignee: Uni Charm Corp
Priority date: 1995-11-29
Filing date: 1996-11-28
Publication date: 1998-10-23

Abstract

The present invention relates to a disposable diaper comprising a liquid permeable outer plate, an inner liquid impermeable plate, a liquid absorbent core disposed therebetween, and indicator means provided in a front or back region of the diaper to reveal when the Indicator medium is wetted with urine and therefore allows the occurrence of body fluid excretion to be visually recognized from the diaper extremity, in disposable diaper it is characterized because a) the inner plate is light transmitting, b) the indicator means comprises a hydrophilic base plate, a first coating layer formed on one side of the base plate and having a color different from that of the base plate, and a second coating layer formed on the other side in the base plate or a upper surface of the first coating layer so as to substantially cover the color of the first coating layer when the medium indicated r is dry but, as the indicator medium is improved with urine, it becomes transparent and therefore reveals the color c) the first coating layer comprises at least one of silica and alumina particles, and water absorbing binder and dye; d) the second coating layer comprises at least one of silica and alumina particles, and hydrophilic binder, and e) the indicator medium is joined to the diaper by interminently joining said second coating layer to the inner surface of said inter-plate.

Description

PESTICIDE The present invention relates to a disposable diaper and more particularly to a disposable diaper with a pointer that serves to alert a mother to the urination of her baby. The Japanese Open Utility Model No. 58415 discloses a disposable diaper employing indicator means having a color change layer formed on an interior surface of an inner diaper plate and a colored permeable layer formed to cover the change layer. color. With the known indicator means, a quantity of urine discharged on the diaper penetrates through the permeable layer towards the color change layer, which therefore becomes transparent and transmits the color of the permeable layer so that the mother You can recognize this color externally from the diaper and be informed that the diaper should be changed with a new one. The indicator means employed by the aforementioned disposable diaper is + surely provided with a mechanism that reveals the color change, but the diaper does not include mechanism to ensure penetration of the urine into the indicator means. The indicator means, comprising permeable and color changing layers, is formed on a hydrophobic polyethylene film from which the inner plate is made and therefore is a problem that the indicator means, as well as a surrounding region this medium, can not be easily wetted with urine. Although it can be contemplated that the desired penetration of the urine into the indicator means can be achieved by attaching the indicator means to an absorbent core of diaper fluid with the use of hydrophilic adhesive, no adhesive is found capable of fulfilling that purpose, that is, there is no adhesive that can be cured as quickly as possible with high diaper productivity. Therefore, it is doubtful if this indicator means is surely sensitive for urination to be revealed or not. In addition, the inner plate made of polyethylene does not absorb different pigments used to form the color change layer and the permeable layer, so the diaper manufacturing process can not proceed from one step to the next step before it has been a long time to properly dry these layers. As a consequence, the productivity of the diaper is significantly limited. In view of the problem, as described above, it is a primary object of the invention to provide an improved disposable diaper in such a way that the penetration of the urine into the indicator means can be facilitated without affecting the productivity of the diaper. The above object is achieved, according to the invention, with a disposable diaper comprising a liquid-permeable outer plate, an inner plate impervious to liquid, a liquid-absorbing core disposed therebetween, an indicator means provided in a region front or back of the compartment to reveal when the indicator means t wetted with body fluids and therefore allow the occurrence of excretion of body fluid to be externally recognized from the diaper; The disposable diaper is characterized by: a. The inner plate is transmitter of l l z; b. The indicator means comprises a hydro-base plate 11, a first coating layer formed on one side of the base plate and has a different color from that of the base plate, and a second coating layer formed on the other side of the base plate. the base plate or an upper surface of the first coating layer, so as to cover substantially the color of the first coating layer when the indicator means is dry but becomes transparent, and therefore reveals the color, when wet the indicator medium with rina; c. The first coating layer comprises at least one of alumina or silica particles, and a water absorbing binder and colorant; d. The second coating layer comprises at least one of silica and alumina particles, and a hydrophilic binder; and e. The indicator means is attached to the diaper by means of an integer connection of the second coating layer to an inner surface of the inner plate.

Figure 1 is a perspective view showing one embodiment of the inventive diaper partially detached; Figure 2 is a sectional view taken along the line II-II in Figure 1; Figure 1 is a view similar to Figure 2 showing another embodiment of the diaper of the invention; Figure 4 is a view similar to Figure 1 showing another embodiment of the diaper of the invention; and Figure 5 is a sectional view taken along line VV in Figure 4. A panty-type diaper 1 shown in FIG. 1 in a partially detached perspective view comprises a liquid-permeable outer plate 2, inner plate impermeable to liquid 3 and an absorbent core of liquid 4 disposed therebetween. The outer plate 2 and the inner plate 3 are hermetically joined to each other on portions thereof extending outwardly beyond a peripheral edge of the core 4. The diaper 1 is composed of a frontal region 6, a posterior region 7 and a bifurcation region 8 extending between them. The front and rear regions 6 and 7 are placed one on top of the other along transverse side edges thereof, respectively, with the outer plate 2 inside and integrally joined to each other by attachment points 10 arranged along the respective side edges intermittently in a vertical direction thereof, so as to form a waist opening 12 and a pair of iron openings 1. The respective openings 12, 13 are provided along peripheral edges thereof with an elastic member 15 for the waist opening 12 and the elastic members 16 for the respective leg openings 13. These members are 15, 16 they are arranged between the outer plate 2 and the inner plate 3 and are connected in an elastically stretched condition to an inner surface of at least 1 of these outer plates 2 and inner plate 3. The outer plate 3 can be made of non-woven fabric or perforated plastic film and the inner plate 3 can be made of light transmitting plastic film having a light transmission rate of 20 to 80%, and preferably of white or white film with the milk permeable to air but impermeable to liquid having a light transmission ratio of 30 to 70% and obtained by stretching plastic film containing inorganic particles, for example, titanium dioxide, sulfur ato barium or calcium carbonate. The core 4 comprises a core body 4a molded of fluff pulp and super absorbent polymer particles in an hourglass shape and a cover plate 4b made of tissue paper adapted to cover the core body 4a. In the front region 6 there is, arranged between the inner plate 3 and the core 4, an indicator 18 comprising a strip-like plate extending parallel to the waistline which may indicate to a woman that her baby has become pregnant. urinated When this indicator 18 is wet with urine, Moral patterns 19 printed on it are visible to the tr-birds of the inner plate-3 whereby the mother can identify the urination of her baby and know that the diaper 1 should be replaced by a new one, as soon as possible. Figure 2 is a sectional view taken along the line TI-IT in Figure 1. Co or will be understood from Figure 2, the indicator 18 comprises a hydrophilic base plate 21, flower patterns 19 printed on an inner surface of the base plate 21 and hidden imprints 22 disposed on the outer surfaces of the respective floral patterns 19 and covering at least this floral patterns 19 so that these floral patterns 19 are substantially invisible from the outside while diaper 1 is dry. The hidden impressions 22 corresponding to the respective floral patterns 19 are joined by intermittently applying hot melt type adhesives 23 to the inner surface of the inner plate 3 so that at least the regions of the base plate 21 on which the Floral patterns 19 are printed, may be closely in contact with the inner plate 3. It will be understood, however, that a strip of the base plate 21 may sometimes not be attached to the inner plate 3 on transversely opposite sides of the strip defined by a length L As shown, the floral patterns 19 are closely in contact with the core 4.

The base plate 21 that forms the IB-indicator can be made of hydrophilic paper capable of printing that < It has a base weight of 15 - 40g / ma. The flock patterns 19 comprise a first colored coating layer deposited on one side of the base plate 21 and obtained by printing or applying an aqueous dye or colorant including, for example, pigment having a different color from the base plate 21. and of the concealed impressions 22 from 5 to 20% by weight, inorganic dispersing particles such as silica (S? Oa) or alumina (I2O3) from 5 to 35% by weight, hydrophilic acrylic binder from 5 to 25% by weight and water from 30 to 75% by weight. The floral patterns 19 appear white due to the scattering of light by the inorganic particles while they are dry but the scattering of light is suppressed and their own color develops when wet with urine. Each hidden form 22 comprises a second layer of coating deposited on one side of the base plate 21 to cover the floral patterns 19 and is obtained by printing or applying aqueous ink or dye including, for example, inorganic particles such as silica or alumina from 10 to 40% by weight, hydrophilic acrylic binder from 5 to 25% by weight and water from 40 to 85% by weight. The hidden forms 22 appear white or milk white due to scattering of light and prevent the floral patterns 19 from being recognized visually by the hidden forms 22 while the forms 22 are dry. When they are wetted with urine, on the other hand, their scattering of light is suppressed and their transparency increased. The proper color of the floral patterns 19 which is different from the hidden patterns 22, as well as the base plate 21, becomes apparent by allowing the floral patterns 19 to be recognized visually through the hidden points 22. The base plate 21 cooperates with the hidden forms 22 to cover the floral patterns 19 when the base plate 21 is dry and its cover effect is suppressed by wetting the base plate 21 with urine, allowing the floral patches 19 to be easily recognized. Although the color of the inner plate 3 is usually white or milk white, the color is not limited to such a color as long as it can cover the core 4. If the indicator 18, placed on the inner side of the inner plate-3, is spaced from the inner plate 3, it would be difficult for the floral patterns 19 to be visually recognized through the inner plate 3, even if the indicator 18 is wetted with the urine and the floral patterns 19 develop their intense colors. According to the invention, such apprehension can be avoided by holding the indicator 18 tightly in contact with the inner plate 3. The regions 25 (Figure 2) are left between each pair of intermittently applied adjacent points of adhesive 23 in which the indicator 18 and the inner plate 3 are not joined together and the presence of urine in this region will further facilitate the floral patterns 19 being visually recognized. There is an apprehension that the hot-melt adhesive 23 with which the indicator 18 is attached to the inner plate 3, could penetrate into the hidden forms 22 and deteriorate the covering effect of the hidden forms 22, since the printed forms hidden 22 become transparent due to penetration of the hot melt type adhesive or if they were wet with urine. To solve such an inconvenience, the adhesive 23 is intermittently applied to the indicator 18 at least in the regions corresponding to the floral patterns 19 and most preferably in order not to exceed 70% of each floral pattern area. It is preferred to use the adhesive 23 which does not contain oily ingredients and does not tend to penetrate towards the hidden impressions 22. The indicator 18 attached to the inner plate 3 has its longitudinally opposite margins defined by a length L on which the indicator 18 it is not attached to the inner plate 3 and is deformable in order to obtain the possibility that the indicator 18 may be in close contact with the core 4. Such an arrangement allows a quantity of urine to penetrate from the core 4 through said margins towards the regions of the floral patterns 19 attached to the inner plate 3. The length L of each margin operating as mentioned above is preferably 10 nm or greater. It is also possible, to make it possible for the indicator 18 to be wetted, to connect the indicator 18 intermittently to the cover plate 4b of the core 4 or to interfit the inner plate 3 intermittently to said cover plate 4b in the vicinity of the indicator 18. Figure 3 is a similar view - to Figure 2 showing another embodiment of the indicator 18. This indicator 18 is longitudinally undulated and repeatedly has ridges 30 and bottoms 31. The indicator 18 is in contact with the core 4 on the ridges 30 and joined in the bottoms 31 to the inner plate 3 by the adhesive 23. The floral patterns 19 are formed in respective bottoms 31 and the hidden print 22 is continuously formed on the entire outer surface of the base plate 21. A quantity of urine penetrates from the core n 4 through the ridges 30 towards the floral patterns 19. The indicator 18 of such an arrangement is advantageous since the indicator 18 can surely be in contact with the core 4 even when the inner plate 3 this spacing of the core 4 due to ripple. Figure 4 and 5 are respectively a view similar to Figure 1 showing another embodiment of the diaper 1 and a sectional view taken along the line VV in Figure 4. In this embodiment of the diaper 1 an interior surface of a The core body 4a of the core 4 is formed with a plurality of grooves 40 extending from the frontal region 6 towards the bifurcated region 8 and passing through the indicator 18 in the vicinity of an outer surface 44 of the core body 4a. Within the slots 40, the body fluff pulp of the core 4a is locally compressed and has a greater density in the bottoms 40a of the slots 40 than the remaining regions of odo that an amount of urine discharged over the bifurcation region 8 is rapidly extends along the bottoms 40a of the slots 40 and wets the indicator 18. With the core 4 comprising fluff pulp and superabsorbent polymer particles, the diffusion of the body fluids is generally slow, but the presence of the 40a funds (Relatively high density makes it easier for the indicator 18 to get wet quickly with the urine and therefore the appropriate color of the floral patterns carried on the ism is developed even if the indicator 18 is located away from the bifurcation region 8. To implement the invention, the indicator 18 is preferably made of hydrophilic material that is easily wetted with urine, and for example, the base plate 21 is made e of pulp fiber or rayon fiber. The colors of the base 21, the floral patterns 19 and the hidden patterns 22 as well as the color of the interior plate 3 can be selected so that the appropriate color of the flower patterns 19 can be developed as intensely as possible. when the indicator 18 moved with urine. The hidden forms 22 are not limited to the illustrated embodiments but can be formed by applying ink or dye on, and adjacent to, the regions of the respective floral patterns 19. Also in such a case, the surface of the indicator 18, on which the printed forms Hidden 22 are formed, is attached to the inner plate 3. The base plate 21 is not limited to the strip-like configuration as illustrated, but can be integrated in other appropriate configurations. For example, SL is employed a rectangular base plate 21, this base plate 21 can be provided with a surrounding margin with a width of 10 inrn or greater along which the base plate 21 is not attached to the inner plate 3 to ensure that the base plate 21 is always in contact with the core 4. The flower patterns 19 can be replaced with any other suitable pattern or with a coating layer completely deposited on a surface of the base plate 21. The materials used in the invention to form the coating layer can be dye or ink, and a coating technique can be employed, including a npression technique, to form the coating layer. The materials used to form the coating layer can be added with ingredients such as polyacrylic ether to promote the penetration of urine into the coating layer. If the plastic film is used as the inner plate 3, nonwoven fabric may be applied on its outer surface to obtain a cloth-like feel. With the disposable diaper provided by the invention, the indicator comprises, the first coating layer adapted to develop an intense color upon wetting, and the hydrophilic base plate on which the first coating layer is formed in a suitable pattern, wherein the indicator is intermittently attached to the inner surface of the inner ear plate so that a quantity of urine can penetrate and extend from the liquid absorbent core through the base plate to the first coating layer to safely wet this layer and, consequently, the first coating layer can develop its own color. The mdicator attached to the inner plate has its longitudinally opposite margins and / or the peripheral edge not attached to the inner plate par-a which is deformable or corrugated and therefore ensures its contact with the absorbent core of liquid. In a "diaper" embodiment a plurality of grooves having their relatively denser density bottoms formed by the absorbent core of locally compressed liquid including pulp fiber, between one of the front and back regions and the region of bifurcation and crossing the indicator, the indicator gets wet with the urine and develops its own color with urination, even if the indicator is located away from the bifurcation region. According to the invention, the use of such an indicator does not adversely affect diaper productivity since the indicator can be manufactured by a process independent of the major manufacturing processes for the diaper.

Claims

NOVEDñP PE Lñ INVENCIÓN CLAIMS

1. - A disposable diaper comprising a liquid permeable outer plate, an inner plate - impervious to liquid, a liquid absorbent core disposed therebetween, and indicator means provided in a front or back region "read diaper to reveal when the indicator means is wet with urine and therefore allow the occurrence of excretion of body fluid to be visually recognized from the outside of the disposable diaper diaper is characterized in that a) the inner plate is light transmitting; b) the indicator means comprises a hydrophilic baseplate, a first coating layer formed on one side of the baseplate and having a different color from the baseplate, and a second coating layer formed in the baseplate. another side on the base plate or an upper surface of the first layer of the coating so as to substantially cover the color of the first coating layer when the indicator means is dry but, when the indicator medium is wetted with urine, becomes transparent and therefore reveals the color; c) the first coating layer comprises at least one silica and alumina particle, and water absorbing binder and dye; d) the second layer "The coating comprises at least one" He particles silica and alumina, and hydrophilic binder; and e) the indicator means is attached to the diaper by interconnecting said second coating layer to the inner surface of said inner plate.

2. The comfort diaper with the claim 1 further characterized because the inner lacquer is made of plastic film "has a proportion" light transmission of 20 to 80%.

3. The diaper according to claim 1, further characterized in that the indicator means is attached to said inner plate by intermittent spots of hot melt type adhesive.

4. The diaper in accordance with claim 3 feature < Jo also because the hot melt adhesive does not contain oily ingredients.

5. The diaper according to claim 1 further characterized in that the indicator means has the first coating layers arranged intermittently on the base plate.

6. The diaper according to claim 1 further characterized in that the indicator means has the first layers of the coating and the second coating layers both arranged intermittently on the base plate.

7. The diaper according to claim 1 furthermore "jo" because the plate "base for the indicator means includes a peripheral region that has a diameter width of 10 mm or greater that is not attached to the plate. inside.

8. The diaper according to claim 1 further characterized? Or < That the base plate is a narrow strip "plate" which has its longitudinal margins and opposite lengths extending by 10 mm or more without joining the inner plate.

9. The diaper according to claim 1, further characterized in that the base plate has a corrugation in one direction and is joined respectively to the bottoms of the corrugation to the inner plate, on the one hand, and spaced respectively on the ridges. of the undulation from said bottom plates but suitable for contacting the core in said crests; and in that the first coating layer is formed at least on said ripple bottoms.

10. A diaper according to claim 1, further characterized in that the core contains horra pulp; wherein a plurality of grooves formed by the locally compressed pulp and having their relatively high density bottoms extending between one of the front and rear regions and the "Je bifurcation" region; and wherein the slits pass through the indicator means provided in one of the front and rear regions. RFSUMFN!) F I O INVENTION A disposable diaper is provided with an indicator-adapted to reveal if it is wet with urine discharge <; Ja and to warn a mother of her baby's urination; the indicator comprises a hydrophilic base plate, a first coating layer formed on one side of the base plate to develop its own color when the indicator is wetted with urine, and a second layer of coating formed on the other side of the base plate or super surface of the first layer of coating and intermittently joined to the inner surface of the inner plate so that the second layer of coating covers the first layer of coating; The second coating layer becomes transparent when the indicator is wetted with urine. P96-918 EA / ad * yc