GB2101038A - Disposable product with hydrophobic anti wetback sheet - Google Patents

Disposable product with hydrophobic anti wetback sheet Download PDF

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Publication number
GB2101038A
GB2101038A GB8207353A GB8207353A GB2101038A GB 2101038 A GB2101038 A GB 2101038A GB 8207353 A GB8207353 A GB 8207353A GB 8207353 A GB8207353 A GB 8207353A GB 2101038 A GB2101038 A GB 2101038A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
hydrophobic
wadding
product
disposable
disposable product
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB8207353A
Other versions
GB2101038B (en )
Inventor
Hamzeh Karami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Colgate-Palmolive Co
Original Assignee
Colgate-Palmolive Co
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53743Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers
    • A61F13/53747Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers the layer is facing the topsheet
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53743Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers
    • A61F13/53756Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other layers the layer facing the back-sheet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form ; Layered products having particular features of form
    • B32B3/02Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form ; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form ; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022Non-woven fabric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0253Polyolefin fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14Mixture of at least two fibres made of different materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/726Permeability to liquids, absorption
    • B32B2307/7265Non-permeable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/73Hydrophobic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00Personal care
    • B32B2555/02Diapers or napkins

Abstract

Disposable product for example a diaper having a hydrophobic layer (12) formed of non-woven polyethylene or polypropylene fibres, a hydrophobic tissue wadding (16, 18, 26) preferably wrapped around (26) an absorbent pad (14) and a water-proof backing sheet (20) of plastic film secured at its edges (22) to the top layer (12). <IMAGE>

Description

1 GB 2 101 038A 1

SPECIFICATION

Disposable product with hydrophobic anti wetback sheet This invention relates to disposable products, such as diapers, sanitary pads, or underpads, and more particularly to a diposable product having a wet strength hydrophobic tissure wadding for preventing fluid wetback while maintaining the shape of the abosrbent pad.

Disposable diapers having an absorbent pad formed of a core of wood fluff or like material are well known. These pads have been used with and provided with a tissue wadding which, in the past, has been of highly fluid permeable and fluid absorbent materal. Waddings have been used to wrap the absorbent pad, but the tissue wadding when wet loses strength and, in use, the pad often loses its shape and its absorbing qualities, and permits an unwanted degree of fluid wetback.

Attempts have been made to provide a barrier to the fluid wetback, such as the barrier layer shown in the patent to John Michael Hernandez, No. 3, 987,792, for Disposable Diaper Having Improved Liquid Retention. However, the hydrophobic fibres of the barrier layer of this prior patent form a relatively thick resilient fibrous pad and because of the resistance to penetration by fluids which is present, a water pervious top layer having fluid feeding openings therein must also be used.

The present invention overcomes the difficulties of the prior art and achieves the results desired by providing a disposable product including both a hydrophobic non-woven top sheet and a tissue wadding preferably a thin wadding e.g. a tissue thin wadding, which is preferably wrapped about the absorbent pad so that the tissue wadding being of hydrophobic nature tends to retain its full strength even after fluid has passed into the absorbent pad and cooperates with the top sheet in preventing fluid wetback, thus providing a dry surface in contact with the skin of the user.

Accordingly, the primary object of the present invention is to provide a disposable dia- per having means to retain the shape of the absorbent pad and which reduces fluid wetback.

Another object of the invention is to provide a disposable diaper having two thin layers of hydrophobic non-woven material to reduce fluid wetback and maintain an infant using the disposable diaper in a dryer condition.

Yet another object of the invention is to provide a disposable diaper which provides a high degree of resistance to fluid weback yet does not require a thick barrier layer, thereby providing an increased amount of absorbing material while limiting the bulk and size of the diaper.

The invention may be put into practice in 130 various ways and two specific embodiments will be described by way of example with reference to the accompanying drawings in which:

Figure 1 is an exploded perspective view of a first embodiment of a diaper constructed according to the present invention, with parts being broken away to show other parts in details; Figure 2 is a vertical sectional view, taken along the plane of the line 2-2 in Fig. 1; and Figure 3 is a view similar to Fig. 2, but illustrating a second preferred embodiment of the invention with the tissue wadding wrapped about the pad.

In the accompanying drawings like reference numerals designate similar parts throughout the various views. Reference numeral 10 is used to generally designate a disposable diaper construted in accordance with the present invention. The diaper comprises, in order, a top sheet 12 formed by non-woven hydrophobic fibres of polyethylene or polypropylene or a mixture thereof. This layer is water pervious, but not water absorbing, and permits passage of waste fluid toward the bsorbent pad 14, which is separated from the top sheet 12 by a tissue wadding 16 of hydrophobic non-woven fibres, preferably of polyethylene or polypropylene, or a mixture thereof.

A wadding 18 lies beneath the pad 14 between it and a water impervious backing sheet 20 formed of a suitable synthetic plastic material, such as polyethylene film (see Fig.2). The backing sheet is folded over the edges of the top sheet 12 at 22 and secured thereto to hold the diaper in assembled condition. Adhesives, heat sealing, embossing or other means may be used for assembly purposes. The core 14 is preferably formed of a wood fluff or tissue layers of paper-like material, which are highly absorbent. This material, when subjected to stress, will readily distort.

In the embodiment shown in Fig. 3 a tissue wadding 26 is wrapped about the pad 4 in lieu of the wadding sheets 16 and 18. This increases the support given to the pad 14 and further assists in assuring its shape.

The wrapping wadding 26 maintains the shape of the pad by providing a high strength wrapping because this hydrophobic material has a very good degree of wet strength and in fact does not absorb fluid, thereby not becoming weakened by the passage of fluid therethrough. The hydrophobic material resists fluid wetback and in conjuction with the hydrophobic top sheet achives a high degree of reistance to fluid wetback, even through the material will readily allow fluid to pass through it into the pad 14. This is because the wadding, 16, 18 or 26 being made of hydrophobic fibres, unlike the tissue waddings of the prior art, does not absorb fluid.

2

Claims (4)

1. A disposable product comprising, in order, a hydrophobic top layer, a hydrophobic tissue wadding, an absorbent pad, and a waterproof backing sheet.
2. A disposable product as claimed in Claim 1, in which the said wadding is wrapped around the said absorbent pad and holds the said pad together.
3. A disposable product as claimed in Claim 1 or Claim 2, in which the said wadding is a tissue formed of non-woven fibres of polyethylene or polypropylene or mixtures thereof.
4. A disposable diaper as claimedin in Claim 1 substantially as specifically described herein with reference to the accompanying drawings.
Printed for Her Majesty s Stationery Office by Burgess & Son (Abingdon) Ltd -1983. Published at The Patent Office, 25 Southampton Buildings, london WC2A 'I AY from which copies may be obtained GB 2 101 038A 2
4. A disposable product as claimed in any one of Claims 1 to 3 in which the said top layer is formed of non-woven fibres of poly ethylene or polypropylene or mixtures thereof.
5. A disposable product as claimed in any one of Claims 1 to 4 in which the said backing sheet is an imperforate plastic film.
6. A disposable product comprising, in order, a top sheet of hydrophobic non-woven fibres capable of passing fluid but substantially not absorbing the fluid, an absorbent pad having a wrapping thereabout of a tissue wadding formed of hydrophobic non-woven material for retaining the shape of the pad while resisting fluid wetback, a water impervious backing sheet, and means holding said product in assembled condition.
7. A product as claimedin in any one of Claims 1 to 6 in the form of a diaper.
8. A disposable diaper a3 claimed in Claim 1 substantially as specifically described herein with reference to Figs. 1 and 2 or with reference to Fig. 3 of the accompanying drawings.
CLAIMS (16 Jul 1982) 1. A disposable product comprising, in order, a hydrophobic top sheet formed of nonwoven fibres of polyethylene or polypropylene or mixtures thereof, a first hydrophobic wadding of tissue formed of non- woven fibres of polyethylene or polypropylene or mixtures thereof, an absorbent pad, a second hydrophobic wadding, separate from the said first wadding, of tissue formed of non-woven fibres of polyethylene or polypropylene or mixtures thereof, and a waterproof backing sheet.
2. A disposable product as claimed in Claim 1 in which the said backing sheet is an imperforate plastic film.
3. A product as claimed in Claim 1 or Claim 2 in the form of a diaper.
GB8207353A 1978-06-09 1979-06-07 Disposable product with hydrophobic anti wetback sheet Expired GB2101038B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US91411078 true 1978-06-09 1978-06-09

Publications (2)

Publication Number Publication Date
GB2101038A true true GB2101038A (en) 1983-01-12
GB2101038B GB2101038B (en) 1983-06-08

Family

ID=25433932

Family Applications (2)

Application Number Title Priority Date Filing Date
GB7919871A Expired GB2023068B (en) 1978-06-09 1979-06-07 Disposable product with hydraphobic anti wetback sheet
GB8207353A Expired GB2101038B (en) 1978-06-09 1979-06-07 Disposable product with hydrophobic anti wetback sheet

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB7919871A Expired GB2023068B (en) 1978-06-09 1979-06-07 Disposable product with hydraphobic anti wetback sheet

Country Status (9)

Country Link
JP (1) JPH0122361B2 (en)
BE (1) BE876895A (en)
CA (1) CA1148302A (en)
DE (1) DE2922988A1 (en)
DK (1) DK238679A (en)
ES (1) ES251185Y (en)
FR (1) FR2427799B1 (en)
GB (2) GB2023068B (en)
NL (1) NL7904543A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4798603A (en) * 1987-10-16 1989-01-17 Kimberly-Clark Corporation Absorbent article having a hydrophobic transport layer
US4904249A (en) * 1988-06-06 1990-02-27 Kimberly-Clark Corporation Absorbent undergarment with fluid transfer layer and elasticized crotch design
US5562650A (en) * 1994-03-04 1996-10-08 Kimberly-Clark Corporation Absorbent article having an improved surge management
US6316687B1 (en) 1989-10-04 2001-11-13 Kimberly-Clark Worldwide, Inc. Disposable diaper having a humidity transfer region, Breathable zone panel and separation layer

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420536A1 (en) * 1984-06-01 1985-12-05 Rodler Ing Hans Nappy
CA2014203C (en) 1989-05-08 2000-03-21 Margaret Gwyn Latimer Absorbent structure having improved fluid surge management and product incorporating same
US5037409A (en) 1990-07-12 1991-08-06 Kimberly-Clark Corporation Absorbent article having a hydrophilic flow-modulating layer
CA2060744C (en) 1991-09-11 2002-01-29 William Duane Hanson Thin absorbent article having rapid uptake of liquid
US5192606A (en) 1991-09-11 1993-03-09 Kimberly-Clark Corporation Absorbent article having a liner which exhibits improved softness and dryness, and provides for rapid uptake of liquid
US5370764A (en) 1992-11-06 1994-12-06 Kimberly-Clark Corporation Apparatus for making film laminated material
CA2088391A1 (en) 1992-11-06 1994-05-07 Mir Inayeth Alikhan Fibrous laminated web and method and apparatus for making the same
US5817394A (en) 1993-11-08 1998-10-06 Kimberly-Clark Corporation Fibrous laminated web and method and apparatus for making the same and absorbent articles incorporating the same
US5728081A (en) * 1996-07-16 1998-03-17 Fibertech Group, Inc. Absorbent composite article having fluid acquisition sub-layer
DE19919397A1 (en) * 1999-04-28 2000-11-02 Hcd Gmbh Hygiene products, particularly incontinence products

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809089A (en) * 1971-05-26 1974-05-07 B Hedstrom Diaper
US3881488A (en) * 1971-11-01 1975-05-06 Int Paper Co Disposable diaper
US3838692A (en) * 1972-11-27 1974-10-01 Johnson & Johnson Hydrophobic sheet with hydrophilic passages
US3952745A (en) * 1974-11-19 1976-04-27 The Procter & Gamble Company Disposable diaper having readily flushable absorbent media and improved pad intergrity in use
US3987792A (en) * 1975-07-31 1976-10-26 Colgate-Palmolive Company Disposable diaper having improved liquid retention
US4077410A (en) * 1976-07-06 1978-03-07 Johnson & Johnson Disposable absorbent pad with non-woven facing
DE2817998A1 (en) * 1977-04-29 1978-11-02 Procter & Gamble including strip-disposable diaper having elastic adjacent to the absorbent core

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4798603A (en) * 1987-10-16 1989-01-17 Kimberly-Clark Corporation Absorbent article having a hydrophobic transport layer
US4904249A (en) * 1988-06-06 1990-02-27 Kimberly-Clark Corporation Absorbent undergarment with fluid transfer layer and elasticized crotch design
US6316687B1 (en) 1989-10-04 2001-11-13 Kimberly-Clark Worldwide, Inc. Disposable diaper having a humidity transfer region, Breathable zone panel and separation layer
US5562650A (en) * 1994-03-04 1996-10-08 Kimberly-Clark Corporation Absorbent article having an improved surge management

Also Published As

Publication number Publication date Type
CA1148302A (en) 1983-06-21 grant
ES251185U (en) 1980-09-16 application
FR2427799B1 (en) 1985-03-01 grant
CA1148302A1 (en) grant
BE876895A1 (en) grant
BE876895A (en) 1979-10-01 grant
GB2101038B (en) 1983-06-08 grant
JPS54163138A (en) 1979-12-25 application
DE2922988A1 (en) 1979-12-20 application
GB2023068A (en) 1979-12-28 application
DK238679A (en) 1979-12-10 application
NL7904543A (en) 1979-12-11 application
JPH0122361B2 (en) 1989-04-26 grant
FR2427799A1 (en) 1980-01-04 application
GB2023068B (en) 1982-11-24 grant
ES251185Y (en) 1981-09-01 grant

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