WO2016120876A1 - Indicateur d'humidité pour couche culotte - Google Patents

Indicateur d'humidité pour couche culotte Download PDF

Info

Publication number
WO2016120876A1
WO2016120876A1 PCT/IL2016/050091 IL2016050091W WO2016120876A1 WO 2016120876 A1 WO2016120876 A1 WO 2016120876A1 IL 2016050091 W IL2016050091 W IL 2016050091W WO 2016120876 A1 WO2016120876 A1 WO 2016120876A1
Authority
WO
WIPO (PCT)
Prior art keywords
indicator
diaper
absorbent material
wetness
elongated
Prior art date
Application number
PCT/IL2016/050091
Other languages
English (en)
Inventor
Dvir HAJBI
Israel VAKNIN
Original Assignee
Hajbi Dvir
Vaknin Israel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hajbi Dvir, Vaknin Israel filed Critical Hajbi Dvir
Publication of WO2016120876A1 publication Critical patent/WO2016120876A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
    • A61F2013/427—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm pH indicator

Definitions

  • the present invention relates to the field of diapers. More particularly, the invention relates to a wetness sensitive film useful in the construction of disposable diapers, which provide a visual indication of the presence of moisture in a disposable diaper or similar article.
  • Disposable diapers have to a great extent replaced cloth diapers in the field of infant care. Many different styles of disposable diapers have been introduced to the marketplace, differing in materials, physical configuration, and cost. Although diapers are primarily worn by infants, they are also used by adults with incontinence.
  • a disposable diaper includes a liquid-pervious topsheet, a liquid-impervious backsheet, a liquid- absorbent core interposed between these top- and backsheets, and an indicator by which it is perceptible from outside the backsheet whether urination has occurred or not.
  • the indicator has a liquid-pervious intermediate sheet hydrophilically modified by coating of a hydrophobic fibrous nonwoven fabric with surfactant and a water-soluble coloring agent depicting a given figure which is perceptible from outside the backsheet.
  • the intermediate sheet is interposed between the backsheet and the core and the coloring agent is applied on the surface of the intermediate sheet opposed to the backsheet.
  • the indicator can't be seen unless these articles are being taken of.
  • the present invention relates to a wetness indicator for a diaper, comprising:
  • a pH indicator included in at least one section of said elongated absorbent material, wherein the color of said pH indicator is indicative of a pH level of a fluid in contact with it;
  • wetness indicator characterized in that, when said first portion of said elongated absorbent material is in fluid communication with a solution, a sample of said solution is drawn along said absorbent material towards said second portion, such that a response of said pH indicator to the pH level of said sample is visible at said second portion.
  • the wetness indicator is flexible, or at least the second portion of the elongated absorbent material is flexible. According to an embodiment of the invention, the wetness indicator has a strip-like form.
  • the elongated absorbent material is provided in form of a film.
  • the pH indicator is included in at least one of the following sections of the elongated absorbent material: the first portion, the second portion, combinations of both portions, or along the entire length of the absorbent material.
  • the present invention relates to a disposable diaper, comprising:
  • a wetness indicator that comprises :
  • an elongated absorbent material having a first portion and a second portion, wherein said second portion extends from the boundaries of said diaper!
  • a pH indicator included in at least one section of said elongated absorbent material, wherein the color of said pH indicator is indicative of a pH level of a fluid in contact with it!
  • the diaper further comprises fastener straps for securing the diaper to a wearer.
  • Fig. 1 schematically a wetness indicator, according to an embodiment of the invention.
  • Fig. 2 schematically illustrates a disposable diaper provided with the wetness indicator of Fig. 1, according to an embodiment of the invention.
  • the present disclosure is generally directed to absorbent articles adapted to indicate the presence of a body fluid in the absorbent article or other changes in the condition of the product or wearer.
  • the absorbent article may be, for instance, a diaper, an incontinence product, or the like.
  • the absorbent articles are disposable, meaning that they are designed to be discarded after a limited use rather than being laundered or otherwise restored for reuse.
  • the present invention relates to wetness indicator for a diaper that will clearly signal time to change diaper.
  • the wetness indicator may have a strip-like form that contains non-toxic materials that changes color in the presence of wetness in the diaper, such that a portion of the wetness indicator (i.e., an indication zone) extends the boundaries of the diaper (e.g., by being folded over the diaper edge at the waist line).
  • a portion of the wetness indicator i.e., an indication zone
  • the wetness indicator enables a caretaker to easily know when the diaper become soiled and require changing, as the indication zone can be positioned outwardly from the wearer's garment (e.g., it may extend from the boundaries of the diaper as to be visible to a caretaker).
  • Fig. 1 shows a wetness indicator that can be used in conjunction with the invention.
  • the wetness indicator illustrated in this figure is particularly convenient because it can be applied as an add-on layer to existing diapers without the need to carry out major alterations in their structure.
  • the present invention is suitable for use with various other absorbent articles intended for personal wear including, but not limited to, diapers, training pants, swim pants, incontinence products, other personal care or health care garments, and the like without departing from the scope of the present invention.
  • the wetness indicator generally indicated by numeral 1 in the figure comprises an elongated absorbent material 2 provided with a halochromic chemical compound 3 (i.e., a pH indicator such as Nitrazine Yellow) in such a way that the pH of a solution (e.g., urine) sensed by wetness indicator 1 can be determined visually.
  • a halochromic chemical compound 3 i.e., a pH indicator such as Nitrazine Yellow
  • the pH indicator causes the color of the solution to change depending on the pH level.
  • wetness indicator 1 is adapted to draw at least a sample of a solution (e.g., body fluids such as urine) from at least one sampling zone (i.e., a first portion of wetness indicator 1, as indicated by a circled dotted line 4) to an indication zone (i.e., a second portion of wetness indicator 1, as indicated by a circled dotted line 5) for a length of about few centimeters (e.g., 4-20 cm - depending on the size of the diaper).
  • the sampling zone is adapted to be in fluid communication with a solution
  • the indication zone is adapted to exhibit color due to a pH change.
  • first portion 4 of wetness indicator 1 e.g., that is in fluid communication with an inner layer 11 of a diaper 10 as indicated in Fig. 2
  • second portion 5 i.e., the indication zone, e.g., as circled by a dotted line
  • This enables to easily view the reaction of the pH indicator to the sampled solution outside the diaper (or any other absorbent articles intended for personal wear to which wetness indicator 1 can be attached or integrated).
  • wetness indicator 1 may have an elongated form such as an elongated strip-like form, a wire-like form or other elongated form.
  • absorbent material 2 can be provided in a film-like form.
  • wetness indicator 1 is flexible (or at least a portion of it is flexible, such as the indication zone 5).
  • the wetness indicator can be provided in a strip -like form that has a first end and a second end.
  • the wetness indicator includes an elongated absorbent film provided with the pH indicator so the pH of a solution (e.g., body fluids) sensed by a first portion at the first end of the strip is capable of being drawn along the absorbent film such that it can be determined visually on a second portion of the strip that is located at the second end of the strip, while only the first portion of the strip is in fluid communication with the solution.
  • a solution e.g., body fluids
  • the pH indicator is included in at least one section of absorbent material.
  • the at least one section can be the indication zone 5, the sampling zone 4, combinations of both zones.
  • the pH indicator is included along the entire length of the absorbent material 2.
  • diaper 10 provided with wetness indicator 1 is shown in accordance with an embodiment of the present invention.
  • diaper 10 may also include an absorbent pad 11, fastener straps 12 that are initially used to secure the diaper 10 to a wearer (e.g., straps 12 can be in form of resealable tapes), elasticated waist bands 13, etc.
  • Disposable diaper 10 allows the transfer and distribution of body fluids to absorbent pad 11 where it is locked in.
  • absorbent pad 11 is sandwiched between two sheets of nonwoven fabric.
  • Absorbent pad 11 is specially designed to absorb and retain body fluids, and the nonwoven fabric gives diaper 10 a comfortable shape and helps prevent leakage.
  • Absorbent pad 11 may consist of an absorbent material such as synthetic polymers or superabsorbent polymers.
  • Absorbent pad 11 can be composed of two essential elements, a hydrophilic, or water-loving, polymer and a fibrous material such as wood pulp.
  • the polymer can be made of fine particles of an acrylic acid derivative, such as sodium acrylate, potassium acrylate, an alkyl acrylate, etc. These polymeric particles act as tiny sponges that retain many times their weight in water.
  • the absorbent pad 11 forms the inner layer of diaper 10.
  • the first portion 4 of wetness indicator 1 is located within diaper 10 in a way that it contacts or enables fluid communication with absorbent pad 11, in order to draw solution absorb by absorbent pad 11 (as schematically shown in Fig. 2) while the second portion 5 of wetness indicator 1 extends from the boundaries 14 of diaper 10. Due to the flexibility of wetness indicator 1, portion 5 may be folded on top of a clothing article.
  • disposable diaper 10 can made by a multi-step process in which absorbent pad 11 is first vacuum- formed, then the wetness indicator 1 and absorbent pad 11 are attached together to a permeable top sheet and impermeable bottom sheet.
  • the components can be sealed together by application of heat or ultrasonic vibrations.
  • Elastic fibers are attached to the sheets to gather the edges of the diaper into the proper shape so it fits snugly around a baby's legs and crotch.
  • the disposable diaper 10 When properly fitted, the disposable diaper 10 will retain body fluids which pass through the permeable top sheet and are absorbed into the absorbent pad 11, while the wetness indicator 1 will draw at least a sample of the body fluids from the sampling zone 4 towards the indication zone 5.
  • the wetness indicator of the present invention may extend either from the top or side of the diaper or other similar article (e.g., like a little "tail"), such that the indication zone of the wetness indicator is exposed and positioned outwardly from the wearer's garment as to be visible to a caretaker.
  • the pH indicator is not positioned outwardly from the wearer's garment, which requires taking off the clothing (or at least some of them) in order to know if a diaper changing is required.
  • wetness indicator of the present invention may work with different types of pH indicator, such as Methyl Orange, Resorcin Blue, Alzarin Red S, Litmus, Chrophenol Red, etc., as will be appreciated by a person skilled in the art, for safety purposes, non-toxic pH indicators should be employed.
  • pH indicator such as Methyl Orange, Resorcin Blue, Alzarin Red S, Litmus, Chrophenol Red, etc.
  • Nitrazine Yellow is a non-toxic indicator commonly used in OB-GYN testing for presence of amniotic fluid due to its color change in mildly basic environments. For this reason, Nitrazine can be used as the pH indicator. Of the several configurations of the wetness indicator that were tested, the following yield the optimal results ⁇
  • Nitrazine gauze A saturated solution of Nitrazine in Methanol was prepared (IPA, and Ethanol are alternatives), and a cotton gauze was soaked therein. The gauze was then allowed to dry by placing in an aluminum dish and mildly heating it on a hotplate (hanging to dry is also effective.) This dried gauze is termed Nitrazine gauze hereinafter.
  • Nitrazine gauze is folded over to have approximately six single-layers, and is trimmed by scissors to a size of about 1 X 6cm (3/8 X 2 1/4 in). The nitrazine gauze is then wrapped in a single layer of Kimwipe lab paper. The purpose of this paper is to form a barrier between the nitrazine gauze and the bicarbonate paper while they are dry, this will be discussed next.
  • the bicarbonate paper is cut to strips of about 2 X 13 cm (3 ⁇ 4 X 5 in.).
  • the Kimwipe wrapped nitrazine gauze is placed on the bicarbonate paper strip, and the bicarbonate strip is folded over the wrapped nitrazine gauze lengthwise such that it envelopes the wrapped nitrazine gauze from both sides.
  • the portion of the bicarbonate paper not in contact with the nitrazine is wrap, is wrapped in layers of Kimwipe lab paper (4 to 6 layers). This is to aid in drawing the urine upwards towards the nitrazine.
  • the wrapping is done in a manner similar to rolling a cigarette such that the wrapping overlaps the nitrazine zone by approximately 1 ⁇ 2 cm (1/8 in.).
  • a Polyethylene bag was welded on three sides using a KingPack impulse Sealer bag sealer. The constructed paper was inserted into the bag nitrazine side first, such that the bag overshoots the nitrazine zone by about 1 ⁇ 2 cm (1/8 in.) This bag forms a non-permeable barrier between the nitrazine zone and the environment as an added precautionary measure for the user.
  • the whole laminate is enveloped in a permeable synthetic cloth such as that used as the inside liner of a diaper, and welded on all open sides using the bag sealer referenced above.
  • This barrier allows fluids to be absorbed by the papers inside, while providing a texture comfortable to the touch.
  • the wetness indicator is wetted by dipping in urine for a few seconds. Within several seconds to a minute, the indicator zone changes its color (e.g., from yellow it turns to blue), indicating urine presence and the need to change the diaper.
  • At least the indication zone of the wetness indicator may be printed with a pattern (or provided with a printed layer). For example, if this pattern has a blue color, then the printed pattern will disappear when the diaper becomes wet (due to body fluids).

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

La présente invention concerne un indicateur d'humidité pour une couche culotte, comprenant : a) un matériau absorbant de forme allongée ayant une première partie et une seconde partie, et b) un indicateur de pH compris dans au moins une section du matériau absorbant de forme allongée, la couleur dudit indicateur de pH indiquant un niveau de pH d'un fluide en contact avec celui-ci, l'indicateur d'humidité étant caractérisé en ce que lorsque la première partie du matériau absorbant de forme allongée est en communication fluidique avec une solution, un échantillon de la solution est aspiré le long dudit matériau absorbant vers la seconde partie, de telle sorte qu'une réponse dudit indicateur de pH au niveau de pH de l'échantillon est visible de la deuxième partie.
PCT/IL2016/050091 2015-01-29 2016-01-28 Indicateur d'humidité pour couche culotte WO2016120876A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL237017 2015-01-29
IL23701715 2015-01-29

Publications (1)

Publication Number Publication Date
WO2016120876A1 true WO2016120876A1 (fr) 2016-08-04

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PCT/IL2016/050091 WO2016120876A1 (fr) 2015-01-29 2016-01-28 Indicateur d'humidité pour couche culotte

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WO (1) WO2016120876A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109852135A (zh) * 2017-11-30 2019-06-07 金永昌 根据ph变化而变色的复合薄膜和包含该复合薄膜的纸尿裤
WO2020190625A1 (fr) 2019-03-15 2020-09-24 Bostik, Inc. Indicateur d'humidité exempt d'espèces contenant un halogène

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731685A (en) * 1971-04-01 1973-05-08 W Eidus Moisture indicating strip for diapers and surgical dressings
WO2010049829A2 (fr) * 2008-10-31 2010-05-06 Kimberly-Clark Worldwide, Inc. Articles absorbants pourvus de capteurs de fuite imminente

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731685A (en) * 1971-04-01 1973-05-08 W Eidus Moisture indicating strip for diapers and surgical dressings
WO2010049829A2 (fr) * 2008-10-31 2010-05-06 Kimberly-Clark Worldwide, Inc. Articles absorbants pourvus de capteurs de fuite imminente

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109852135A (zh) * 2017-11-30 2019-06-07 金永昌 根据ph变化而变色的复合薄膜和包含该复合薄膜的纸尿裤
WO2020190625A1 (fr) 2019-03-15 2020-09-24 Bostik, Inc. Indicateur d'humidité exempt d'espèces contenant un halogène
CN113543758A (zh) * 2019-03-15 2021-10-22 波士胶公司 不含有含卤素物质的湿度指示剂

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