EP0975532B1 - Multi-compartment rehydrating container - Google Patents
Multi-compartment rehydrating container Download PDFInfo
- Publication number
- EP0975532B1 EP0975532B1 EP98909237A EP98909237A EP0975532B1 EP 0975532 B1 EP0975532 B1 EP 0975532B1 EP 98909237 A EP98909237 A EP 98909237A EP 98909237 A EP98909237 A EP 98909237A EP 0975532 B1 EP0975532 B1 EP 0975532B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compartment
- container
- self
- water
- rehydrating
- 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.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2093—Containers having several compartments for products to be mixed
-
- 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
- B65D81/32—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 for packaging two or more different materials which must be maintained separate prior to use in admixture
- B65D81/3261—Flexible containers having several compartments
- B65D81/3266—Flexible containers having several compartments separated by a common rupturable seal, a clip or other removable fastening device
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/05—Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
- A61J1/10—Bag-type containers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
- A61J1/202—Separating means
- A61J1/2024—Separating means having peelable seals
Definitions
- the invention is related to a new self-rehydrating container having at least two separated compartments containing solutes, drugs, insoluble materials or mixtures thereof.
- the invention concerns also methods of using such a container to prepare rehydrated solutions or suspensions.
- Cellulose films are known to be relatively inert semi-permeable strong membranes capable of separating compounds with different molecular weight by osmosis or dialysis for example. According to EP 360,612 or USP 4,920,105, such films are efficiently used as membrane for the manufacture of self-rehydrating container wherein the membrane constitutes at least a portion of the walls of the container and wherein an osmotically active solute is retained within the container. When this container is placed into water, osmosis takes place and fills it with water which is purified by filtration through the membrane.
- osmotically active solute means a substantially water-soluble solute or a concentrated solution thereof able to sustain osmosis through the semi-permeable membrane.
- Another problem resides in the fact that when containers having semi-permeable membranes are used to produce nutritional solute solutions such as milk powder solutions or fruit juice preparations, the dried food may contain residual bacteria, usually in a dormant form.
- the container When the container is put into water of about 30°C, such as in tropical areas, and the rehydrated solution is consumed directly after preparation, no significant bacterial problem arises.
- the contaminating bacteria can proliferate and become a serious threat to health. Therefore the storage of these milk powders, dried food or fruit juice or other preparations in dry form, likely to contain residual bacteria in a separate pouch which can be easily opened and which would only be opened just before consumption when the container is already substantially full of purified water, would be of interest.
- FIG. 3 of EP 360,612 discloses a container provided with two burstable internal pouches containing a water soluble solute. This disclosure does not enable any other embodiment of a container with an additional pouch, nor does it suggest any.
- a self-rehydrating container having an osmotically active compartment and at least a separate watertight compartment containing a solute, a liquid, a drug, nutritional materials, insoluble materials, etc. (generally a water-soluble or -suspendible product) and which could be easily manufactured and especially easily used.
- osmotically active compartment means a compartment having at least a portion of its walls of semi-permeable material, such that when an osmotically active solute is retained within this compartment and when the compartment is placed into water, osmosis can take place.
- Another object of the present invention is to provide a self-rehydrating container allowing the preparation of accurately dosed solutions.
- Yet another object of the invention is to provide a self-rehydrating container for the preparation of solutions comprising labile materials or low molecular weight materials, these solutions being substantially free of micro-organisms coming from the outside water.
- a further aim of the present invention is also to provide a self-rehydrating container for the production of nutritional solutions or suspension substantially free of undesirable micro-organisms having grown within the container.
- Another object of this invention is to provide a self-rehydrating container which fulfils these requirements but which is also easy to use and easy to manufacture.
- the invention is firstly concerned with a self-rehydrating container for the production of solutions or suspensions substantially free of undesirable micro-organisms, characterised in that the container is divided into at least two compartments by at least a non-permanent seal bonding the opposite walls of said container, the walls of the container surrounding at least a first compartment being watertight, the walls of the container surrounding at least one portion of at least a second compartment being semi-permeable, an osmotically active solute being retained in said second compartment and a solute, a drug, a nutritional suspension or powder to be put into solution or suspension is retained in said first watertight compartment.
- a non-permanent seal means a seal which may be peeled or broken by seal anchorage failure or external manipulation or by the effect of water pressure.
- the container is constituted of a rectangular sheet of semi-permeable material folded over itself to form a tube, a waterproof longitudinal seal bonding the overlapping portions of said tube, said tube being flattened and closure means closing the top and bottom extremities of the tube.
- the semi-permeable material constituting the membrane can be selected from a wide variety of materials including cellulose, regenerated cellulose (CELLOPHANE®, cuprammonium cellulose, ...), benzoylated cellulose, and collagen.
- the preferred material is regenerated cellulose.
- This membrane may be produced by one or several known manufacturing methods, such as xanthate, cuprammonium, carbamate or organic solvent (e.g. NMMO) processes when a regenerated cellulose material is used.
- this membrane may serve as a support layer for a thin second layer.
- the second layer can be composed of cellulose derivatives (e.g. ethers, esters, nitro-cellulose, etc.), synthetic organic polymers (e.g. polyacrylic ester, polyvinyl acetate copolymers, polyurethanes, aliphatic polyamides such as a nylon 6, nylon 6.6, nylon 4.6 and the like), modified or unmodified naturally occurring polymers (e.g. starches, proteins, etc.).
- cellulose derivatives e.g. ethers, esters, nitro-cellulose, etc.
- synthetic organic polymers e.g. polyacrylic ester, polyvinyl acetate copolymers, polyurethanes, aliphatic polyamides such as a nylon 6, nylon 6.6, nylon 4.6 and the like
- modified or unmodified naturally occurring polymers e.g. starches, proteins, etc.
- the second layer consists of a thin layer of an hydrophilic polyurethane such as those conventionally used for covering textile with a protective waterproof but water vapour permeable coating.
- the overall thickness of the membrane is from 20 to 50 ⁇ m.
- the sheet of semi permeable material advantageously possesses a strip of adhesive material coated therein in a direction perpendicular to the axis of the tube to be formed. Therefore, when the tube is flattened, the opposite walls of the container possess a strip of adhesive material into register with one another and when pressure is applied, with or without heat, a seal is created between the opposite walls of the container.
- Suitable material which can be used as adhesive material to form the seal bonding the opposite walls of the container are heat sealable adhesive compositions such as polyvinylidene chloride, polyethylene, thermoplastic polyurethane, ethylene-vinyl acetate copolymer, acrylic resins, and the like, alone or in admixture. Additives such as waxes may also be added to these components.
- Cold sealable adhesive compositions such as natural or modified rubber, neoprene and the like are also suitable.
- the longitudinal seal closing the tube according to this embodiment may also advantageously possess some particular features.
- An overlap seal resists high water pressure without opening due to the fact the adhesive shear plane no longer lays in line with the water pressure.
- An overlap seal according to this embodiment is a seal where, in the zone of adherence, the opposite walls of the two semi-permeable materials are positioned in a parallel relationship, both respective membrane endings pointing in the opposite direction and made adherent to one another by means of an adhesive layer in such a manner that the water pressure no longer lays in line the adhesive shear surface of the adhesive layer.
- Suitable materials which can be used as adhesive material to form the longitudinal seal are heat sealable adhesive compositions such as polyvinylidene chloride, polyethylene, thermoplastic polyurethane, ethylene-vinyl acetate copolymer, acrylic resins, and the like, alone or in admixture. Additives such as waxes may also be added to these components.
- Cold sealable adhesive compositions such as natural or modified rubber, neoprene and the like are also suitable.
- This kind of overlap seal may also be used as closure means at the top and bottom extremities of the container.
- closure means at the top and bottom extremities of the container are therefore constituted of waterproof seals between the opposite walls of the container.
- a double folded seal according to this embodiment is a composed seal where, in the zone of adherence, the two semi-permeable sheets are positioned in a parallel relationship, both respective membrane endings pointing in the same direction, in the zone of adherence the parallel laying sheet extremities are being folded back over such that the outer surface parts of the semi-permeable material sheet are pointing to one another.
- the said extremities are made adherent to one another by means of an adhesive in a manner such that the water pressure which can be exerted on the longitudinal seal lays in line with the adhesive shear plane of the adhesive coating.
- the adhesive coating adheres the two outer surface parts of the sheet and remains unopened even under considerable water pressure in the container.
- Suitable materials which can be used as adhesive material for the top and bottom seals are heat sealable adhesive compositions such as polyvinylidene chloride, polyethylene, thermoplastic polyurethane, ethylene-vinyl acetate copolymer, acrylic resins, and the like, alone or in admixture. Additives such as waxes may also be added to these components.
- Cold sealable adhesive compositions such as natural or modified rubber, neoprene and the like are also suitable.
- a suitable water- or air-barrier composition for example by coating from a solution, lamination, extrusion coating or in-situ polymerisation into either or both surfaces of the membrane.
- Suitable materials to this end are: for the watertight only walls polyvinyl chloride copolymer with vinyl acetate or vinyl maleate and the like and for the water- and air-tight walls polyvinylidene chloride and the like.
- a self-rehydrating container can be used to prepare a water solution of a water soluble or suspendible product having a molecular weight well below the molecular weight cut-off of the membrane.
- the low molecular weight water soluble or suspendible product must be retained in the watertight compartment while an osmotically active solute (eventually the same) is retained in the osmotically active compartment.
- a self-rehydrating container is the preparation of accurately dosed solutions of labile water soluble or suspendible product.
- the labile water soluble or suspendible product is retained in the watertight compartment while an osmotically active solute is retained in the osmotically active compartment.
- the osmotically active compartment should also possess a mark allowing to determine the volume of water in said container.
- the container is removed from the external water, the non-permanent seal is broken and the final accurately dosed solution or suspension is prepared.
- a self-rehydrating container can also be used to prevent products such as vitamins, fats or drugs to be affected by oxidation or hydrolysis because they are only contacted with water (and air if the compartment is also air-tight) just before consumption after substantially sterile water has been prepared in the osmotically active compartment and the non-permanent seal is peeled (broken).
- food grade rehydrated solutions or suspensions can be prepared using a container according to the invention, the shelf life thereof can be extended. Indeed, the dried food powder is kept in the watertight compartment, and is only mixed with water, just before consumption once sterile water is prepared. Deprived from water, the food powder contaminating bacteria, if any, will not proliferate. Once the solution prepared with the container is ready, it can directly be consumed or refrigerated.
- a typical use of the new self-rehydrating container with a watertight and oxygen proof compartment is to protect the components of Infant Formulae Milk and High Energy Therapeutic Milks which are subjected to dialysis and oxidation and may contain dormant bacteria or bacterial spores which would proliferate to dangerous levels with time when mixed with water.
- Carbohydrates are used as the water soluble osmotically active solutes in the osmotically active compartment.
- compositions may be distributed into the two compartments of the container according to the invention in the following way: 38 g/l sucrose and 2.9 g/l trisodium citrate in the osmotically active compartment and 3.5 g/l sodium chloride and 1.5 g/l potassium chloride in the watertight compartment.
- the container containing thus a sodium and potassium chloride mix in the watertight compartment and an osmotically active sucrose/citrate blend in the other compartment is immersed into water with a "ready-to-use" mark pointing up.
- the osmotically active compartment is allowed to fill by osmosis up to the ready-to-use mark while the watertight compartment floats on top of the water. Once filled, the pack is gently removed from the external water.
- the container is inverted and the non-permanent seal is allowed to gently break open.
- the salt content is mixed with the water and an ORS solution is obtained. Then, one can either cut the top section off and feed the dehydrated person or animal by spoon or cup feeding or tear off the top seal and place the container inside a suitable container to provide support by exposing the inner surface of the membrane for drinking.
- Example 2 Use of a self-rehydrating container.
Abstract
Description
120 g of methylethylketone are then introduced into the reaction vessel.
A solution of 13.68 g of isophorone diamine in 350.00 g of isopropyl alcohol is introduced in a second 2-liter four necked round bottomed flask equipped with a mechanical stirrer, a thermometer, an air condenser, a nitrogen inlet and a dropping funnel.
The content of the first flask is cooled at room temperature and is then added slowly to the mixture alcohol/amine (second flask). Chain extension is complete after about 3 hours.
44.2 g or fumed silica (TS100 DEGUSA) and 50 g of toluene are added to the mixture.
Polyvinylidene chloride (VICLAN VR 545 from ZENECA)
Polyvinylidene chloride (IXAN PNE 613 from SOLVAY)
Polyvinylidene chloride.
Around 20% of sucrose and trisodium citrate is effectively lost through dialysis.
Approximately, 88% of sodium and potassium chloride is also lost through dialysis.
The container is inverted and in less than 1 minute, the water enters the watertight compartment. The solution is mixed with resulting concentration of 42 g of sucrose, 3 g trisodium citrate, 3.5 g of sodium chloride and 1.5 g of potassium chloride per litter solution.
Around 20% of sucrose and trisodium citrate is effectively lost but none of the sodium and potassium chloride is lost. The final solution composition meets the specification of the WHO for Oral Rehydration Solution.
However, it has been discovered that potassium iodide, potassium chloride and magnesium chloride dialysed to equilibrium gives more than 90 weight % losses, with zinc acetate and tri-potassium citrate dialysing to a lesser extent 30% and 10% losses respectively. In addition, water soluble vitamins like vitamin c, folic acid etc. are either likely to dialyse or oxidise.
Also fats present within the therapeutic milk are more prone to oxidation.
The resulting milk initially had low total viable count (TVC) for bacteria but within 1-2 hours the TVC increases to levels which become unacceptable for human consumption.
Claims (14)
- Self-rehydrating container for the production of solutions or suspensions substantially free of undesirable micro-organisms, characterised in that the container is divided into at least two compartments by at least a non-permanent seal bonding the opposite walls of said container, the walls of the container surrounding at least a first compartment being watertight, the walls of the container surrounding at least one portion of at least a second compartment being semi-permeable, an osmotically active solute being retained in said second compartment and a solute, a drug, a nutritional suspension or powder to be put into solution or suspension is retained in said first watertight compartment.
- Self-rehydrating container according to claim 1, characterised in that the semi-permeable material constituting at least a portion of at least a compartment is selected from the group consisting of cellulose, regenerated cellulose, benzoylated cellulose and collagen, said material being coated or uncoated.
- Self-rehydrating container according to claim 2, characterised in that the semi-permeable material comprises a first support layer of cellulose, regenerated cellulose, benzoylated cellulose or collagen and a thin second layer selected from the group consisting of cellulose derivatives, synthetic organic polymers and modified or unmodified naturally occurring polymer.
- Self-rehydrating container according to claim 3, characterised in that the thin second layer consists of a thin layer of hydrophilic polyurethane.
- Self-rehydrating container according to anyone of claims 1 to 4, characterised in that the watertight compartment retains a water-soluble solute having a molecular weight cut-off below the molecular weight cut-off of the said semi-permeable material.
- Self-rehydrating container according to anyone of claims 1 to 5, characterised in that the osmotically active compartment possesses marks allowing to determine the volume of water in said compartment and in that the watertight compartment retains an accurately dosed composition of water-soluble solute such that when said accurately dosed composition is put into solution in the water having filled the osmotically active compartment up to a defined volume, an accurately dosed solution is obtained.
- Self-rehydrating container according to anyone of claims 1 to 6, characterised in that the non-permanent seal consists of polyvinylidene chloride.
- Self-rehydrating container according to anyone of claims 1 to 7, characterised in that the walls of the watertight compartment possess further gas barrier properties and preferably are substantially air-tight.
- Self-rehydrating container according to claim 8 characterised in that the coating consists of polyvinylidene chloride.
- Self-rehydrating container according to anyone of claims 1 to 9, characterised in that the watertight compartment retains dried food products.
- Self-rehydrating container according to claim 10, characterised in that the watertight compartment retains Infant Formulae Milk powder or High Energy Therapeutic Milk powder
- Process for the preparation of a solution or a suspension of at least a water soluble or suspendible product, substantially free of undesirable micro-organisms, characterised in that it comprises the steps ofa) including said at least a low molecular weight water soluble or suspendible product of a self-rehydrating container according to any one of claims 1 to 11;b) including an osmotically active solute in the osmotically active compartment of said container;c) immersing said container in water and leaving it in water until the purified water in the osmotically active compartment has reached a sufficient level;d) breaking the non-permanent seal;e) allowing the watertight compartment to be filled with the purified water from the osmotically active compartment; andf) optionally, allowing the water soluble or suspendible product initially retained the watertight compartment to be dissolved or mixed until a solution or a suspension is obtained.
- Milk product prepared according to the process of the claim 12.
- Oral rehydration solution prepared according to the process of the claim 12.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9705455A GB9705455D0 (en) | 1997-03-17 | 1997-03-17 | Self-rehydrating container |
GB9705455 | 1997-03-17 | ||
PCT/BE1998/000035 WO1998041458A1 (en) | 1997-03-17 | 1998-03-13 | Multi-compartment rehydrating container |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0975532A1 EP0975532A1 (en) | 2000-02-02 |
EP0975532B1 true EP0975532B1 (en) | 2002-08-14 |
Family
ID=10809344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98909237A Expired - Lifetime EP0975532B1 (en) | 1997-03-17 | 1998-03-13 | Multi-compartment rehydrating container |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP0975532B1 (en) |
JP (1) | JP2001516238A (en) |
CN (1) | CN1251075A (en) |
AT (1) | ATE222204T1 (en) |
AU (1) | AU735473B2 (en) |
BR (1) | BR9808361A (en) |
CA (1) | CA2282520A1 (en) |
DE (1) | DE69807207D1 (en) |
GB (1) | GB9705455D0 (en) |
IN (1) | IN190381B (en) |
NZ (1) | NZ337564A (en) |
PE (1) | PE63899A1 (en) |
WO (1) | WO1998041458A1 (en) |
ZA (1) | ZA982201B (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2096570B (en) * | 1981-03-18 | 1985-03-27 | Maloney John | Bag and bag making apparatus |
US4920105A (en) * | 1987-07-09 | 1990-04-24 | Rensselaer Polytechnic Insitute | Membrane pouch |
GB2223696A (en) * | 1988-09-23 | 1990-04-18 | Michael Wilson | Water purifying system |
JP3079403B2 (en) * | 1992-05-03 | 2000-08-21 | 株式会社大塚製薬工場 | Double chamber container |
US5287961A (en) * | 1992-10-23 | 1994-02-22 | W.R. Grace & Co.-Conn. | Multi-compartment package having improved partition strip |
-
1997
- 1997-03-17 GB GB9705455A patent/GB9705455D0/en active Pending
-
1998
- 1998-03-13 CA CA002282520A patent/CA2282520A1/en not_active Abandoned
- 1998-03-13 NZ NZ337564A patent/NZ337564A/en unknown
- 1998-03-13 JP JP53995998A patent/JP2001516238A/en active Pending
- 1998-03-13 WO PCT/BE1998/000035 patent/WO1998041458A1/en active IP Right Grant
- 1998-03-13 AU AU63875/98A patent/AU735473B2/en not_active Ceased
- 1998-03-13 CN CN98803463A patent/CN1251075A/en active Pending
- 1998-03-13 BR BR9808361-9A patent/BR9808361A/en unknown
- 1998-03-13 DE DE69807207T patent/DE69807207D1/en not_active Expired - Lifetime
- 1998-03-13 EP EP98909237A patent/EP0975532B1/en not_active Expired - Lifetime
- 1998-03-13 AT AT98909237T patent/ATE222204T1/en not_active IP Right Cessation
- 1998-03-16 ZA ZA982201A patent/ZA982201B/en unknown
- 1998-03-16 IN IN653DE1998 patent/IN190381B/en unknown
- 1998-03-16 PE PE00018498A patent/PE63899A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CN1251075A (en) | 2000-04-19 |
EP0975532A1 (en) | 2000-02-02 |
AU6387598A (en) | 1998-10-12 |
WO1998041458A1 (en) | 1998-09-24 |
GB9705455D0 (en) | 1997-05-07 |
JP2001516238A (en) | 2001-09-25 |
PE63899A1 (en) | 1999-07-03 |
CA2282520A1 (en) | 1998-09-24 |
ATE222204T1 (en) | 2002-08-15 |
DE69807207D1 (en) | 2002-09-19 |
NZ337564A (en) | 2001-03-30 |
ZA982201B (en) | 1998-09-17 |
AU735473B2 (en) | 2001-07-12 |
BR9808361A (en) | 2000-05-23 |
IN190381B (en) | 2003-07-26 |
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