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WO1992005089A1 - Emballage pour matieres contenant un liquide - Google Patents

Emballage pour matieres contenant un liquide Download PDF

Info

Publication number
WO1992005089A1
WO1992005089A1 PCT/AU1991/000434 AU9100434W WO9205089A1 WO 1992005089 A1 WO1992005089 A1 WO 1992005089A1 AU 9100434 W AU9100434 W AU 9100434W WO 9205089 A1 WO9205089 A1 WO 9205089A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
package
bag
chamber
inner bag
Prior art date
Application number
PCT/AU1991/000434
Other languages
English (en)
Inventor
Gordon Ross Chandler
Original Assignee
Trilogy Pty Ltd
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 Trilogy Pty Ltd filed Critical Trilogy Pty Ltd
Publication of WO1992005089A1 publication Critical patent/WO1992005089A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/264—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing liquids

Definitions

  • the present invention relates to a package for liquid-containing products, such as surgical waste from hospitals, or bed linen from hospitals or nursing homes soaked with blood, urine or other contaminants.
  • Bed linen from hospitals and nursing homes may be soaked with urine, blood, or other contaminants and it is conventional practice to put soiled bed linen into a plastic bag which is sealed and sent to the launderer.
  • the liquid tends to collect in the bottom of the bag so that the bed linen at the bottom of the bag can become saturated and also a pool or residual liquid may remain in the bag whereby removal of the linen from the bag for laundering can be extremely unpleasant. There is also a risk of leakage of the liquid from the bag.
  • a package for a liquid-containing product comprising an outer container substantially impermeable to passage of liquid, means defining within the outer container a compartment for receiving a liquid-containing product and, externally of said compartment, a chamber within the outer container, the arrangement being such that liquid is able to pass from the compartment into the chamber whereby to permit liquid to drain into the chamber from the product to thereby be separated from the product, and means within the chamber for retaining the liquid within the chamber in a non-fluid condition.
  • the fluid retaining means is such as to change the liquid into a state in which it is viable to be released under pressure which arise during handling and storage.
  • the retaining means may comprise super- absorbent particles which are held dispersed, for example within a matrix so as to prevent gel blocking.
  • the outer container may be in the form of an outer bag having an inner bag which defines the compartment for receiving the product and being of perforated or other liquid permeable material to permit passage of liquid at least through a lower portion of the inner bag into the chamber which is formed in the outer bag beneath the bottom of the inner bag.
  • Figure 1 is a perspective view, partly cut away, of an embodiment of the present invention
  • Figure 2 is a sectional side elevational view of the embodiment of Figure 1.
  • a bag-like package 1 in accordance with the preferred embodiment of the invention comprises an outer container in the form of an impermeable bag 2 preferably composed of a strong plastics material having high scuff and tear resistance, such as a linear low density polyethylene, and an inner bag 4 within the outer bag 2 and secured to the outer bag 2.
  • the inner bag 4 forms a product-containing compartment within the outer bag 2 and which receives product through an open mouth of both the inner and outer bags.
  • the inner bag 4 extends along only part of the depth of the outer bag 2 so that the bottom of the inner bag 4 is spaced above the bottom of the outer bag whereby to define within the bottom portion of the outer bag a chamber 6 beneath the inner bag.
  • the inner bag 4 is composed of a material which is easily permeable to liquid in the lower portion of the inner bag. This effect may be achieved by forming the inner bag of a plastics which is perforated in the part defining the lower portion of the inner bag 4.
  • the inner bag 4 may be formed from a material which enables relatively rapid liquid transmission either by capillary or osmotic action; such plastics material is known per se for use in dialysis equipment.
  • plastics material is known per se for use in dialysis equipment.
  • Other liquid permeable materials such as spunbond polyesters, spunbond fibres, or woven materials permeable to the passage of liquids may be used.
  • the inner bag 4 is made of ultra linear low density polyethylene or a suitable co-extrusion of films to give a high stretch, puncture-resistant structure.
  • the use of such a structure reduces the likely damage from sharp objects such as bones which are placed in the bag.
  • the liquid permeability of the inner bag 4 is such as to allow relatively rapid drainage of liquid from the inner bag 4 into the chamber 6 formed in the lower part of the outer bag 2 beneath the inner bag 4. Accordingly, any liquid contained within the product placed into the inner bag 4 can drain relatively quickly (typically within a matter of minutes) from the inner bag 4 into the chamber 6 within the bottom of the outer bag to thereby separate the residual liquid from the product itself.
  • the chamber 6 contains material which will absorb, gel, and/or solidify and/or change the liquid into a highly viscous state whereby the liquid is retained in a non-fluid state to thereby minimise the possibility of liquid leakage or recontamination with the product.
  • a suitable material for incorporation into the chamber 6 will include particles of a so-called super- absorbent which absorbs the liquid and converts it into a gel-like form.
  • Super-absorbents are well known per se and comprise particles of polymeric gelling agent which imbibe many times their own weight of liquid (typically up to 20 times) and thereby form hydrogels, with the liquid being taken into the molecular structure.
  • Present commercially available super-absorbents are typically crosslinked poly(acrylic acid) or acrylic acid grafted on starch. The carboxyl functionality is partially neutralized with sodium or potassium hydroxide. Some types involve graft polymerizing acrylonitrile onto gelatinized starch followed by hydrolysis of the polyacrylonitrile or poly(acrylic acid-co-acrylamide). However, other types of super-absorbents may also be used.
  • the super-absorbents are preferably incorporated within a pad 8 designed to rapidly wick, hold and convert liquids to a solid or semi-solid state by means of the super-absorbents which will swell within a matrix to form hydrogels.
  • the pad 8 has opposed outer layers 10, more clearly shown in Figure 1, which are composed of a liquid permeable membrane designed for the rapid wicking of liquids to give rapid contact between the liquid and a core layer 12 which has an absorbency and conversion function and which is composed of suitable hydrophilic fibres with super absorbent particles interspersed within a fibrous matrix.
  • the outer layers 10 are preferably composed of hydrophobic fibres, and can be made from surfactant treated or silica treated thermoplastic fibres, for example spunbonded polypropylene or other suitable hydrophobic fibrous structures which will rapidly wick liquids.
  • the outer layers 10 have a mean pore size smaller than at least 90% of the fibres or super absorbent particles of the core layer 12 to prevent the escape of the fibres or particles from the pad 8.
  • the outer layers 10 also serve to prevent the escape of swollen hydrogels or fibres, which may have absorbed fluids, from the pad 8 even when the pad 8 is subjected to pressure during handling and transport.
  • the absorbency and conversion core layer 12 is composed of a matrix of suitable hydrophilic fibres with super absorbents interspersed within the fibrous matrix.
  • such fibres are composed of recycled paper fluff with the fibres having an average diameter of 1 to 200 m ⁇ but with a preferable average fibre diameter of 1 to 100 m ⁇ and a preferred length of about 1 mm.
  • Such fibres may need to be treated with a suitable wetting agent, for example Teric Powder which is distributed by I.C.I., to ensure the rapid uptake of fluids by absorption and capillary action.
  • the fluids are not merely absorbed by the fibres in such a manner that they are capable of being released as an expressed liquid when the pad is squeezed, for example when under load.
  • the absorptive fibrous matrix forms means whereby super absorbent particles can be suspended in the matrix to prevent gel blocking and promote optimum absorption by the super absorbents.
  • Suitable super absorbents generally will imbibe, gel or solidify at least 10 times their own weight of fluid and will retain it under moderate pressure. It is ultimately the super absorbents which absorb the fluids and will do so in a manner which prevents the fluid from being released under pressure arising during handling, transport and storage.
  • the super absorbents must be able to hold the imbibed, absorbed or gelled fluids for a period of at least two weeks and be able to do so under normal transport and handling pressures.
  • super-absorbents which will convert from 20 - 27 ml of 0.9% sodium chloride aqueous solution to a gel under a restraining pressure of 21 dynes/cm 2 .
  • Such super- absorbents are able to achieve the required standard for the purposes of this bag.
  • the core layer 12 is preferably composed of from 40 to 95% hydrophilic fibres and from 5 to 60% polymeric gelling agent (super absorbents) dispersed within the hydrophilic fibre matrix. Such ratios have proven satisfactory for optimum absorption and conversion of liquids to gels which will withstand the handling pressures.
  • the pad 8 will be attached to the outside wall of the inner bag 4 or the inside wall of the outer bag 2 within the chamber 6. In most circumstances the pad 8 will not extend more than half way up the side of the bag within the chamber 6. The inner bag 4 will be completely sealed to the outer bag 2 below a handle structure 14 at the top of the bag 2.
  • the inner bag 4 may also be sealed to the outer bag 2 along its longitudinal seams 16. It is desirable that the side walls of the inner and outer bags are not attached to one another except at the top and at the side seams 16. This allows for the greatest flexibility of the internal structure of the chamber 6 and the least chance of damage to the structures under load or handling pressures.
  • the inner surfaces of the bag 4 are preferably treated with ant ⁇ -blocking agents or surfactants such as skim milk or albumen to modify the plastic surface in such a way as to prevent blood, serum or other liquids from causing the inner surfaces to stick together, and which could restrict the flow of liquids into or within the chamber 6. These agents or surfactants will also serve to reduce electrostatic attraction of the plastic surfaces.
  • the inner surface of the outer bag 2, and/or the outer surface of the inner bag 4 are similarly treated with such anti-blocking agents or surfactants to prevent the inner and outer bags from sticking together and which would impede flow of the liquid into, or flow within, the chamber 6.
  • the preferred material for the inner bag is ultra linear low density polyethylene. This is preferably perforated with a series of holes of a suitable size, typically 1 - 5 mm in diameter, across about the lower third of the bag, spaced at approximately 1 cm. These holes allow liquids in the inner bag 4 to drain by way of gravity into the chamber 6 and contact the wicking outlet layers 10 of the pad 8 to thereby start the absorption and conversion process.
  • the bag 1 may be of any size having any predetermined liquid absorbency capacity.
  • a typical surgical waste bag would have a capacity of approximately 70 litres for solid wastes with a liquid absorbency capacity of about 1 litre for most operative procedures. However, it must be stressed that any predetermined liquid absorbency capacity or bag size can be made.
  • the bag 1 While the bag 1 will have a known capacity, it is not possible for the manufacturer to accurately control the amount of liquid placed into the package by the user. It is for this reason that the inner and outer bags are attached only at the top and at their side seams and that the perforations in the inner bag do not extend across its entire surface.
  • the chamber 6 thus extends above the level of the perforations to form additional volume which can receive excess liquid. When excess liquid passes into the chamber 6 it tends to become trapped between the inner and outer bags, the liquid filling the chamber 6 even when the bag is placed on its side or turned upside- down, and is less likely to re-enter the inner bag.
  • the inner bag 4 is provided with opposed sealing flaps 18 which can be engaged to ensure a liquid-tight seal.
  • one or more gas escape valves 20 are preferably provided in the outer bag 2.
  • the valves are such as to permit the release of gas, but not liquid, from within the outer bag 2.
  • Gas absorbing materials such as activated charcoal may also be used within the inner bag 4 and/or within the chamber 6.
  • Absorbing or gas permeable plastics may also be used to remove or vent specific gases from within the inner bag 4 or the chamber 6 however the outer bag should not be permeable to liquids.
  • the inner and outer bags 4, 2 can be simply fabricated from suitable plastics sheeting bonded together, for example by heat sealing at common longitudinal seams and at the top.
  • the absorbency and conversion core layer 12 of the pad 8 may additionally contain materials which will cause chemical reactions to occur within the chamber 6 in such a manner as to cause the formation of precipitates, thereby converting some or all of the liquid components to solids. Any remaining liquids would be absorbed or converted within the matrix as previously described.
  • the absorbency and conversion of the liquid in the chamber 6 may be achieved by colloidal structures whereby liquids are imbibed or held to the colloidal structures. Such suitable materials may be added to, or replace other absorbency or conversion materials within the chamber 6. By way of example only, specific clays and or specific organic matter are known to imbibe fluids.
  • the matrix may contain hygroscopic substances, to thereby hold liquids within the matrix, or deliquescent substances.
  • the matrix may contain substances having high surface forces and high surface areas, such as activated charcoal, or it may contain additives such as surfactants with an oil loving end and a water loving end.
  • the liquid may comprise chemicals which are bonded by electrostatic attraction or by mutual bonding of materials having compatible structures, for example, grease and nylon, in which case the absorbent matrix will act to both separate the materials and to immobilise the liquid.
  • the chamber 6 may contain chemical neutralising agent(s) for a broad range of chemicals or for one or more specific chemicals.
  • the chamber may also contain ionic compounds for attracting and immobilising a broad range of chemicals or for specific chemicals.
  • ionic compounds for attracting and immobilising a broad range of chemicals or for specific chemicals.
  • finely divided clay particles and certain forms of organic matter are known to act as negatively charged ions which can bond with other elements or compounds effectively immobilising them for storage and transport purposes.
  • the chamber 6 includes means (such as the pad 8) specifically designed to immobilise liquids during handling and transport, so that as a design function, no fluids are able to escape from the inner bag 4 or outer bag 2 even in the event of the outer bag 2 being damaged.
  • the invention is applicable to small packages, for instance bags for the shipment of chemical or pathology specimens, intermediate sized bags for handling surgical wastes, or bags or containment vessels large enough to fit shipping containers.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • External Artificial Organs (AREA)

Abstract

Emballage (1) pour matières contenant un liquide, comprenant un récipient externe (2) sensiblement imperméable au liquide, un élément définissant, à l'intérieur du récipient externe (2), un compartiment (4) destiné à recevoir une matière contenant un liquide et, à l'extérieur dudit compartiment, une chambre (6) située dans le récipient externe (2) de manière à permettre au liquide de s'égoutter du compartiment (4) dans la chambre (6) et de se séparer de la matière, et un dispositif (8) se trouvant dans la chambre pour retenir le liquide dans la chambre (6) à l'état non fluide. Le dispositif de retenue (8) peut comprendre des éléments (12) tels que des particules éparpillées d'agents super-absorbants pouvant transformer le liquide en une sorte de gel et donner au liquide un état l'empêchant de s'écouler hors du dispositif de retenue (8).
PCT/AU1991/000434 1990-09-20 1991-09-19 Emballage pour matieres contenant un liquide WO1992005089A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK241190 1990-09-20
AUPK2411/90 1990-09-20

Publications (1)

Publication Number Publication Date
WO1992005089A1 true WO1992005089A1 (fr) 1992-04-02

Family

ID=3774967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1991/000434 WO1992005089A1 (fr) 1990-09-20 1991-09-19 Emballage pour matieres contenant un liquide

Country Status (1)

Country Link
WO (1) WO1992005089A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9401832A (nl) * 1994-11-03 1996-06-03 Krijn Verwijs B V Lekvrije verpakking voor natte, althans vochtige, verswaar alsmede een verpakking voor mosselen en andere schelpdieren.
US6142983A (en) * 1997-09-26 2000-11-07 Kimberly-Clark Worldwide, Inc. Disposable absorbent article having an absorbent support system
AU759987B2 (en) * 1999-08-25 2003-05-01 Best Products Co., Ltd. A storage bag
US11134761B2 (en) * 2016-05-19 2021-10-05 Fisher & Paykel Healthcare Limited Water dispersing bag

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275811A (en) * 1979-08-23 1981-06-30 Cellu Products Company Receptacle for containing and displaying food products
US4382507A (en) * 1979-11-23 1983-05-10 Cellu Products Company Absorbent pad
AU1235388A (en) * 1987-03-03 1988-09-01 Renaco As A method for transport of one-unit packed products which give off moisture and need cooling, and packings for use in carrying out said method
AU1235488A (en) * 1987-03-03 1988-09-01 Renaco As A method for transport/distribution of products, especially sea products, and a packing means for carrying out the method
AU2029188A (en) * 1987-08-04 1989-02-09 Sealed Air Corporation Absorbent pad for use in packaging food products
AU4315589A (en) * 1988-09-19 1990-04-18 Sealed Air Corporation Absorbent pad and method of constructing same
EP0395223A2 (fr) * 1989-04-24 1990-10-31 American Colloid Company Sac pour absorber un liquide
AU7406591A (en) * 1990-05-11 1991-11-14 Minnesota Mining And Manufacturing Company Container for transporting hazardous liquids

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275811A (en) * 1979-08-23 1981-06-30 Cellu Products Company Receptacle for containing and displaying food products
US4382507A (en) * 1979-11-23 1983-05-10 Cellu Products Company Absorbent pad
AU1235388A (en) * 1987-03-03 1988-09-01 Renaco As A method for transport of one-unit packed products which give off moisture and need cooling, and packings for use in carrying out said method
AU1235488A (en) * 1987-03-03 1988-09-01 Renaco As A method for transport/distribution of products, especially sea products, and a packing means for carrying out the method
AU2029188A (en) * 1987-08-04 1989-02-09 Sealed Air Corporation Absorbent pad for use in packaging food products
AU4315589A (en) * 1988-09-19 1990-04-18 Sealed Air Corporation Absorbent pad and method of constructing same
EP0395223A2 (fr) * 1989-04-24 1990-10-31 American Colloid Company Sac pour absorber un liquide
AU7406591A (en) * 1990-05-11 1991-11-14 Minnesota Mining And Manufacturing Company Container for transporting hazardous liquids

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9401832A (nl) * 1994-11-03 1996-06-03 Krijn Verwijs B V Lekvrije verpakking voor natte, althans vochtige, verswaar alsmede een verpakking voor mosselen en andere schelpdieren.
US6142983A (en) * 1997-09-26 2000-11-07 Kimberly-Clark Worldwide, Inc. Disposable absorbent article having an absorbent support system
AU759987B2 (en) * 1999-08-25 2003-05-01 Best Products Co., Ltd. A storage bag
US11134761B2 (en) * 2016-05-19 2021-10-05 Fisher & Paykel Healthcare Limited Water dispersing bag

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