CA2221472A1 - An oxygen absorbing container cap liner - Google Patents
An oxygen absorbing container cap liner Download PDFInfo
- Publication number
- CA2221472A1 CA2221472A1 CA002221472A CA2221472A CA2221472A1 CA 2221472 A1 CA2221472 A1 CA 2221472A1 CA 002221472 A CA002221472 A CA 002221472A CA 2221472 A CA2221472 A CA 2221472A CA 2221472 A1 CA2221472 A1 CA 2221472A1
- Authority
- CA
- Canada
- Prior art keywords
- container
- liner
- oxygen
- cap
- container cap
- 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.)
- Abandoned
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
- B65D51/00—Closures not otherwise provided for
- B65D51/24—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes
- B65D51/244—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes provided with oxygen absorbers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Packages (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
A container cap (11) having a base portion (20), a substantially cylindrical portion (21) extending perpendicularly from a perimeter of the base portion (20) to define an inner surface of the container cap (11), and an uncovered liner (12) disposed directly on the inner surface of the container cap (11), the liner (12) having an oxygen absorbent dispersed therein. The container cap (11) is adapted to seal an opening in a container (15) and to absorb oxygen within the container (15). Also disclosed is a method for removing oxygen from a container (15) by dispersing an oxygen absorbent in a liner (12), attaching the uncovered liner (12) directly to an inner surface of a container cap (11) without a separate adhesive, and placing the cap (11) over an opening in the container (15) such that the liner (12) in the container cap (11) seals the opening and absorbs oxygen within the container (15).
Description
W O 96/39338 PCT~US96/10036 AN OXYGEN ABSORBING CONTAINER CAP LINER
FIELD OF THE INVENTION
This invention relates in general to oxygen absorbents. It relates in particular to an oxygen absorbent dispersed in a liner of a container cap.
BACKGROUND OF THE INVENTION
Many products are susceptible to putre~action, denaturation, mold growth, spoilage, rancidity, oxidation, or other deterioration when brought into contact with oxygen. Examples o~ such products include bee~, wine, ~uice, vinegar, sauces, seasonings, processed ~oods, bread, produce, meats, and certain pharmaceuticals and chemicals, among a variety o~ others. Preservation of such products is disturbed when molds, bacteria, and other organlsms that thrive in the presence of oxygen are present. These organisms cause the putrefaction and change in the taste or quality o~ the product. In addition, some of the products themselves are liable to be affected by oxidation that changes the taste or quality o~ the product. To prevent such oxidation and growth of organisms and thus increase the preservation stability of these products, the oxygen must be removed from the container in which the products are stored.
One technique ~or avoiding or reducing the presence of oxygen is vacuum packing. This involves evacuating a container before charging it with the product. Another technique is gas displacement. Here, an inert yas such as nitrogen is used to displace the air and hence the oxygen in a container. The displacement can be per~ormed before or a~ter the product is charged to the container.
Still another technique is a foaming method.
Particularly applicable to products such as beer, a jet ~oamer can be used to inject a small amount o~
pressurized water to foam the beer after charging it to the container. The foam acts as a mechanical deoxygenizer, forcing the oxygen from the container.
Common disadvantages associated with all of the above techniques are the requirement o~ large-scale apparatus and operation and the difficulty of removing r oxygen dissolved in the product. Also, in general, these techniques leave between C.2~ and 5.0~ of the oxygen in the container. This amount of oxygen in the container is enough to adversely a~ect most products.
A simpler, more efficient techni~ue for oxygen removal involves placing an oxygen absorbent in the container with the product. For this purpose, it is known to attach an oxygen absorbent to the underside of a container cap. For example, in U.S. Patent No.
4,287,995, issued to Moriya, an oxygen absorbent is placed on the underside of a cap. The oxygen absorbent is held in place by a cover layer o~ gas permeable film that prevents contact between the absorbent and the contents o~ the container.
U.S. Patent No. 5,143,763, issued to Yamada et al., discloses a multi-layer composition adapted to be attached to a liner on the underside of a container cap.
The layers of the composition include (1) an adhesive layer that attaches the multi-layer structure to the cap liner, (2) an oxygen absorbing layer consisting of an oxygen absorbent dispersed in a resin, and (3) an oxygen permeable ~ilm layer covering the absorbent layer. The oxygen permeable film layer prevents the oxygen absorbent ~rom leaching out ~rom the resin into the contents o~ the container. The adhesive layer is disposed between the cap liner and the oxygen absorbing layer, comple~ely separating the cap liner ~rom the oxygen absorbing layer.
U.S. Patent No. 5,274,024, issued to Koyama et al., also discloses a multl-layer composition adapted to be attached to the underside of a container cap. The patent discloses an adhesive layer, used to attach an oxygen absorbent layer to the cap, and an outer layer over the oxyyen absorbing layer. The outer layer prevents direct contact between container contents and the oxygen absorbent. Again, the adhesive layer is disposed between the cap and the oxygen absorbent layer, completely separating the cap ~rom the oxygen absorbent layer.
In all o~ the known devices, however, separate layers are used to accomplish the ~unctions of lining the container cap, adhering the oxygen absorbent to the cap, absorbing the oxygen, and covering the oxygen absorber to prevent it ~rom contact~ing the contents within the container.
SUMMARY OF THE I~v~NllON
The present invention provides a container cap having a base portion, a substantially cylindrical portion extending perpendicularly ~rom a perimeter o~ the base portion to de~ine an inner sur~ace o~ the container cap, and an uncovered liner disposed directly on the inner sur~ace o~ the container cap, the liner having an oxygen absorbent dispersed therein. The container cap is adapted to seal an opening in a container and to absorb oxygen within the container.
The present invention also provides a method ~or removing oxygen ~rom a container by dispersing an oxygen absorbent in a liner, attaching the liner directly to an inner sur~ace o~ a container cap, and placing the cap over an opening in the container such that the liner in the container cap seals the opening and absorbs oxygen within the container.
BRIEF DESCRIPTION OF THE DRAWING
Fig 1 is a cross-sectional side view o~ an oxygen absorbing container cap in accordance with an exemplary embodiment o~ the present invention;
Fig. 2 is a perspective view in partial cross-section o~ an oxygen absorbing container cap inaccordance with an exemplary embodiment o~ the present invention;
Fig. 3 is a partially cross-sectional side view o~ an oxygen absorbing container cap attached to a container in accordance with an exemplary embodiment o~
the present invention;
~ Fig. 4 is a cross-sectional side view of an oxygen absorbing cap in accordance with another exemplary embodiment o~ the present invention; and Fig. 5 is a top view o~ the embodiment shown in Fig. 4.
W O 96/39338 PCTrUS96/10036 DETAILED DESCRIPTION OF THE INVENTION
The present invention provides an oxygen absorbing cap with an oxygen absorbent dispersed in a liner of the cap, the liner being directly attached to the inside surface of the cap. No cover layer is used over the liner. When such a cap is secured to a container, the oxygen absorbing liner in the cap acts both as a sealant, providing a seal between the cap and the container, and as an oxygen absorber, removing oxygen from inside the container.
Fig. 1 shows a side view o~ an exemplary embodiment of the present invention. Cap 11 includes a base portion 20 and a cylindrical portion 21 that is typically integrally ~ormed with base portion 20. Cap 11 may be a plastic material, such as polyvinylchloride, polystyrene, or polycarbonate. Cap 11 may also be a metallic material, such as aluminum or iron. Grooves 13 are formed on the inner surface of cap 11 to mate with threads on a container opening (not shown).
~iner 12 is disposed on the inner surface of cap 11. Liner 12 in the illustrated embodiment includes a carrier resin with an oxygen absorbing material dispersed therein.
The oxygen absorbing materials useful in the present invention include iron, solid electrolytic salts, and glucose oxidase. The iron may be hydrogen-reduced iron, electrolytically reduced iron, or chemically W O 96~9338 PCT~US96/10036 reduced iron. Although iron is preferred as the metallic oxygen absorbing agent, it will be appreciated that other metals may be used. These are, by way of example and not limitation, aluminum, copper, zinc, titanium, magnesium, and tin. These other materials do not, however, absorb oxygen as fast as iron or have its oxygen absorbing capacity. Also, other elements which can be used in elemental or partially oxidized form are sodium, manganese, iodine, sulfur, and phosphorous. These elements are also not as effective as iron because they do not have the oxygen absorbing capacity of iron, the rate of oxygen absorption of iron, or both. The oxygen absorbing salt may be sodium chloride or any other suitable food compatible salt including, but not-limited to, sodium sulfate, potassium chloride, ammonium chloride, ~mm~n;um sulfate, calcium chloride, sodium phosphate, calcium phosphate, and magnesium chloride.
For non-~ood products, other non-food compatible salts may be used.
A carrier resin for the oxygen absorbing material is preferably polyvinylchloride plastisol.
Polyvinylchloride plastisol is a known resin for lining the inner surface of container caps. Other resins that may be used as the carrier resin for the oxygen absorbing material and can also serve as suitable sealants include, without limitation, high density polypropylene, high density polyethylene, acrvlic, vinyl acetate ethylene copolymer, ethylene vinyi acetate, vinyl acetate homopolymer, acetate ethylene copolymer, plasticized ~ 30 vinyl chloride, oxidized polyethylene homopolymer, and polyurethane. When polyvinylchloride plastisol is used as the carrier resin, up to 75~ by weight of liner 12 may be 200 mesh iron, a preferred oxygen absorbent.
~iner 12 is prepared by dispersing the oxygen absorbents within the carrier resin (in a viscous liquid state) by mixing in an electric, high-speed mixer. Liner 12 is then sprayed onto the inner surface of cap 11 in liquid form according to methods known in the art. ~iner 12 adheres to cap 11. Cap 11 and liner 12 are then heated (to about 400~F for 2 1/2 minutes) to solidify liner 12. Fig. 2 is a perspective view showing liner 12 coated on the inner surface of cap 11.
Cap 11 is attached to a container by first heating cap 11 until liner 12 softens. Cap 11 is then threaded onto the container, forming threads in liner 12 corresponding to grooves 13 in cylindrical portion 21 of cap 11. As shown in Fig. 3, cap 11 securely fits over the opening of container 15. Liner 12 seals cap 11 to container 15. Thus, liner 12 insures a tight fit between cap 11 and container 15 and ~acilitates the sealing ~unction.
In addition, liner 12 absorbs oxygen within container 15 without the need for additional layers, such as cover layers or adhesive layers. The invention provides an economical ard practical method for absorbing oxygen withln a container by combining the adhesive function (affixing liner ~~2 to cap 11), the oxygen W O 96/39338 PCT~US96110036 g absorbing ~unction, and the container sealing ~unction in a single element: liner 12.
Fig. 4 is a side view o~ an alternative embodiment o~ the present invention. In the illustrated embodiment, cap 11 has a peripheral liner 30 disposed around the intersection o~ base portion 20 and cylindrical portion 21. Peripheral liner 30 extends over grooves 13 such that grooves will be ~ormed in peripheral liner 30 as cap 11 is attached to a container. This ensures sealing cap 11 to the container Peripheral liner 30 does not include an oxygen absorbent.
The embodiment illustrated in Fig 4 also includes a central liner 31. Central liner 31 is disposed on the inner sur~ace o~ base portion 20.
Central liner 31 is centrally disposed and circular in the illustrated embodiment, but any shape or thickness may be used. Central liner 31 contains an oxygen absorbent that absorbs oxygen within the container to which cap ll is attached The oxygen absorbent is dispersed in central liner 31 as discussed above.
Peripheral liner 30 and central liner 31 are both sprayed into cap 11 according to methods known in the art, and then heated to solidi~y.
Fig. 5 is a top view o~ the embodiment illustrated in Fig. 4 This embodiment conserves both the carrier resin material used ~or the liners and the oxygen absorbents.
v W O 96/39338 PCT~US96/100~6 The ~ollowing examples are presented to illustrate the present invention; they are not intended to limit it.
Example 1:
Polyvinylchlorlde plastisol in an amount o~
10.35 grams was blended with 12.51 grams of 200 mesh iron containing 2~ sodium chloride. The blending was done in an electric, high-speed mixer. A sample o~ the resulting liner material was coated on the inner surface o~ a container cap. The container cap was placed ln a 500cc mason jar containing lOOcc o~ oxygen. A one-eighth-inch hole was drilled in the lid o~ the mason jar with a septum placed over the hole to prevent oxygen ~rom leaking out o~ the container. The container was le~t at room temperature at 100~ relative humidity within the jar, and the amount o~ oxygen absorbed over time by the cap liner was measured This procedure was repeated two times using di~erent weights o~ liner material inside the cap. The results are tabulated below.
Oxygen Absorbed Over Time (cc) Sample Sample Sample Average #1 #2 #3 Time (1.47 gms*~(1 71 qms*)(1.51 qms*)(1.56 Gms*) 22 hrs 10 10 10 10 46 hrs 15 14 15 15 96 hrs 24 22 24 23 184 hrs 37 32 34 34 234 hrs 37 32 37 35 330 hrs 51 41 48 47 * Weight o~ liner coated on inner sur~ace o~ cap.
W O 96/39338 P~CT~US96/10036 Example 2:
Polyvinylchloride plastisol in an amount of 8.40 grams was blended with 5.17 grams of 200 mesh iron cont~;n;ng 2~ sodium chloride in an electric, high-speed mixer. A sample of the resulting liner composition was coated on the inner surface of a container cap, which was placed in a 500cc mason jar containing 100cc of oxygen.
A one-eighth-inch hole was drilled in the lid o~ the mason jar with a septum placed over the hole to prevent oxygen from leaking out o~ the container. The container was le~t at room temperature at 100~ relative humidity within the jar, and the amount of oxygen absorbed by the liner over time was measured. The procedure was repeated two times using different weight samples of liner within the cap. The results are tabulated below.
Oxygen Absorbed Over Time (cc) Sample Sample Sample Average #1 #2 #3 Time (1.47 qms*)(1.71 qms*)(1.51 qms*)(1.56-qms*) 22 hrs 8 8 8 8 46 hrs 12 12 12 12 96 hrs 26 19 21 22 184 hrs 46 30 30 35 234 hrs 52 33 30 38 330 hrs 61 43 41 48 * Weight of liner coated on inner surface of cap.
The results of both Examples 1 and 2 show good oxygen absorption using the present invention. Using the invention, the results are achieved with reduced material ; and fabrication time.
Although illustrated and described herein with re~erence to certain specific embodiments, the present invention is nevertheless not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents o~ the claims and without departing from the spirit of the invention.
FIELD OF THE INVENTION
This invention relates in general to oxygen absorbents. It relates in particular to an oxygen absorbent dispersed in a liner of a container cap.
BACKGROUND OF THE INVENTION
Many products are susceptible to putre~action, denaturation, mold growth, spoilage, rancidity, oxidation, or other deterioration when brought into contact with oxygen. Examples o~ such products include bee~, wine, ~uice, vinegar, sauces, seasonings, processed ~oods, bread, produce, meats, and certain pharmaceuticals and chemicals, among a variety o~ others. Preservation of such products is disturbed when molds, bacteria, and other organlsms that thrive in the presence of oxygen are present. These organisms cause the putrefaction and change in the taste or quality o~ the product. In addition, some of the products themselves are liable to be affected by oxidation that changes the taste or quality o~ the product. To prevent such oxidation and growth of organisms and thus increase the preservation stability of these products, the oxygen must be removed from the container in which the products are stored.
One technique ~or avoiding or reducing the presence of oxygen is vacuum packing. This involves evacuating a container before charging it with the product. Another technique is gas displacement. Here, an inert yas such as nitrogen is used to displace the air and hence the oxygen in a container. The displacement can be per~ormed before or a~ter the product is charged to the container.
Still another technique is a foaming method.
Particularly applicable to products such as beer, a jet ~oamer can be used to inject a small amount o~
pressurized water to foam the beer after charging it to the container. The foam acts as a mechanical deoxygenizer, forcing the oxygen from the container.
Common disadvantages associated with all of the above techniques are the requirement o~ large-scale apparatus and operation and the difficulty of removing r oxygen dissolved in the product. Also, in general, these techniques leave between C.2~ and 5.0~ of the oxygen in the container. This amount of oxygen in the container is enough to adversely a~ect most products.
A simpler, more efficient techni~ue for oxygen removal involves placing an oxygen absorbent in the container with the product. For this purpose, it is known to attach an oxygen absorbent to the underside of a container cap. For example, in U.S. Patent No.
4,287,995, issued to Moriya, an oxygen absorbent is placed on the underside of a cap. The oxygen absorbent is held in place by a cover layer o~ gas permeable film that prevents contact between the absorbent and the contents o~ the container.
U.S. Patent No. 5,143,763, issued to Yamada et al., discloses a multi-layer composition adapted to be attached to a liner on the underside of a container cap.
The layers of the composition include (1) an adhesive layer that attaches the multi-layer structure to the cap liner, (2) an oxygen absorbing layer consisting of an oxygen absorbent dispersed in a resin, and (3) an oxygen permeable ~ilm layer covering the absorbent layer. The oxygen permeable film layer prevents the oxygen absorbent ~rom leaching out ~rom the resin into the contents o~ the container. The adhesive layer is disposed between the cap liner and the oxygen absorbing layer, comple~ely separating the cap liner ~rom the oxygen absorbing layer.
U.S. Patent No. 5,274,024, issued to Koyama et al., also discloses a multl-layer composition adapted to be attached to the underside of a container cap. The patent discloses an adhesive layer, used to attach an oxygen absorbent layer to the cap, and an outer layer over the oxyyen absorbing layer. The outer layer prevents direct contact between container contents and the oxygen absorbent. Again, the adhesive layer is disposed between the cap and the oxygen absorbent layer, completely separating the cap ~rom the oxygen absorbent layer.
In all o~ the known devices, however, separate layers are used to accomplish the ~unctions of lining the container cap, adhering the oxygen absorbent to the cap, absorbing the oxygen, and covering the oxygen absorber to prevent it ~rom contact~ing the contents within the container.
SUMMARY OF THE I~v~NllON
The present invention provides a container cap having a base portion, a substantially cylindrical portion extending perpendicularly ~rom a perimeter o~ the base portion to de~ine an inner sur~ace o~ the container cap, and an uncovered liner disposed directly on the inner sur~ace o~ the container cap, the liner having an oxygen absorbent dispersed therein. The container cap is adapted to seal an opening in a container and to absorb oxygen within the container.
The present invention also provides a method ~or removing oxygen ~rom a container by dispersing an oxygen absorbent in a liner, attaching the liner directly to an inner sur~ace o~ a container cap, and placing the cap over an opening in the container such that the liner in the container cap seals the opening and absorbs oxygen within the container.
BRIEF DESCRIPTION OF THE DRAWING
Fig 1 is a cross-sectional side view o~ an oxygen absorbing container cap in accordance with an exemplary embodiment o~ the present invention;
Fig. 2 is a perspective view in partial cross-section o~ an oxygen absorbing container cap inaccordance with an exemplary embodiment o~ the present invention;
Fig. 3 is a partially cross-sectional side view o~ an oxygen absorbing container cap attached to a container in accordance with an exemplary embodiment o~
the present invention;
~ Fig. 4 is a cross-sectional side view of an oxygen absorbing cap in accordance with another exemplary embodiment o~ the present invention; and Fig. 5 is a top view o~ the embodiment shown in Fig. 4.
W O 96/39338 PCTrUS96/10036 DETAILED DESCRIPTION OF THE INVENTION
The present invention provides an oxygen absorbing cap with an oxygen absorbent dispersed in a liner of the cap, the liner being directly attached to the inside surface of the cap. No cover layer is used over the liner. When such a cap is secured to a container, the oxygen absorbing liner in the cap acts both as a sealant, providing a seal between the cap and the container, and as an oxygen absorber, removing oxygen from inside the container.
Fig. 1 shows a side view o~ an exemplary embodiment of the present invention. Cap 11 includes a base portion 20 and a cylindrical portion 21 that is typically integrally ~ormed with base portion 20. Cap 11 may be a plastic material, such as polyvinylchloride, polystyrene, or polycarbonate. Cap 11 may also be a metallic material, such as aluminum or iron. Grooves 13 are formed on the inner surface of cap 11 to mate with threads on a container opening (not shown).
~iner 12 is disposed on the inner surface of cap 11. Liner 12 in the illustrated embodiment includes a carrier resin with an oxygen absorbing material dispersed therein.
The oxygen absorbing materials useful in the present invention include iron, solid electrolytic salts, and glucose oxidase. The iron may be hydrogen-reduced iron, electrolytically reduced iron, or chemically W O 96~9338 PCT~US96/10036 reduced iron. Although iron is preferred as the metallic oxygen absorbing agent, it will be appreciated that other metals may be used. These are, by way of example and not limitation, aluminum, copper, zinc, titanium, magnesium, and tin. These other materials do not, however, absorb oxygen as fast as iron or have its oxygen absorbing capacity. Also, other elements which can be used in elemental or partially oxidized form are sodium, manganese, iodine, sulfur, and phosphorous. These elements are also not as effective as iron because they do not have the oxygen absorbing capacity of iron, the rate of oxygen absorption of iron, or both. The oxygen absorbing salt may be sodium chloride or any other suitable food compatible salt including, but not-limited to, sodium sulfate, potassium chloride, ammonium chloride, ~mm~n;um sulfate, calcium chloride, sodium phosphate, calcium phosphate, and magnesium chloride.
For non-~ood products, other non-food compatible salts may be used.
A carrier resin for the oxygen absorbing material is preferably polyvinylchloride plastisol.
Polyvinylchloride plastisol is a known resin for lining the inner surface of container caps. Other resins that may be used as the carrier resin for the oxygen absorbing material and can also serve as suitable sealants include, without limitation, high density polypropylene, high density polyethylene, acrvlic, vinyl acetate ethylene copolymer, ethylene vinyi acetate, vinyl acetate homopolymer, acetate ethylene copolymer, plasticized ~ 30 vinyl chloride, oxidized polyethylene homopolymer, and polyurethane. When polyvinylchloride plastisol is used as the carrier resin, up to 75~ by weight of liner 12 may be 200 mesh iron, a preferred oxygen absorbent.
~iner 12 is prepared by dispersing the oxygen absorbents within the carrier resin (in a viscous liquid state) by mixing in an electric, high-speed mixer. Liner 12 is then sprayed onto the inner surface of cap 11 in liquid form according to methods known in the art. ~iner 12 adheres to cap 11. Cap 11 and liner 12 are then heated (to about 400~F for 2 1/2 minutes) to solidify liner 12. Fig. 2 is a perspective view showing liner 12 coated on the inner surface of cap 11.
Cap 11 is attached to a container by first heating cap 11 until liner 12 softens. Cap 11 is then threaded onto the container, forming threads in liner 12 corresponding to grooves 13 in cylindrical portion 21 of cap 11. As shown in Fig. 3, cap 11 securely fits over the opening of container 15. Liner 12 seals cap 11 to container 15. Thus, liner 12 insures a tight fit between cap 11 and container 15 and ~acilitates the sealing ~unction.
In addition, liner 12 absorbs oxygen within container 15 without the need for additional layers, such as cover layers or adhesive layers. The invention provides an economical ard practical method for absorbing oxygen withln a container by combining the adhesive function (affixing liner ~~2 to cap 11), the oxygen W O 96/39338 PCT~US96110036 g absorbing ~unction, and the container sealing ~unction in a single element: liner 12.
Fig. 4 is a side view o~ an alternative embodiment o~ the present invention. In the illustrated embodiment, cap 11 has a peripheral liner 30 disposed around the intersection o~ base portion 20 and cylindrical portion 21. Peripheral liner 30 extends over grooves 13 such that grooves will be ~ormed in peripheral liner 30 as cap 11 is attached to a container. This ensures sealing cap 11 to the container Peripheral liner 30 does not include an oxygen absorbent.
The embodiment illustrated in Fig 4 also includes a central liner 31. Central liner 31 is disposed on the inner sur~ace o~ base portion 20.
Central liner 31 is centrally disposed and circular in the illustrated embodiment, but any shape or thickness may be used. Central liner 31 contains an oxygen absorbent that absorbs oxygen within the container to which cap ll is attached The oxygen absorbent is dispersed in central liner 31 as discussed above.
Peripheral liner 30 and central liner 31 are both sprayed into cap 11 according to methods known in the art, and then heated to solidi~y.
Fig. 5 is a top view o~ the embodiment illustrated in Fig. 4 This embodiment conserves both the carrier resin material used ~or the liners and the oxygen absorbents.
v W O 96/39338 PCT~US96/100~6 The ~ollowing examples are presented to illustrate the present invention; they are not intended to limit it.
Example 1:
Polyvinylchlorlde plastisol in an amount o~
10.35 grams was blended with 12.51 grams of 200 mesh iron containing 2~ sodium chloride. The blending was done in an electric, high-speed mixer. A sample o~ the resulting liner material was coated on the inner surface o~ a container cap. The container cap was placed ln a 500cc mason jar containing lOOcc o~ oxygen. A one-eighth-inch hole was drilled in the lid o~ the mason jar with a septum placed over the hole to prevent oxygen ~rom leaking out o~ the container. The container was le~t at room temperature at 100~ relative humidity within the jar, and the amount o~ oxygen absorbed over time by the cap liner was measured This procedure was repeated two times using di~erent weights o~ liner material inside the cap. The results are tabulated below.
Oxygen Absorbed Over Time (cc) Sample Sample Sample Average #1 #2 #3 Time (1.47 gms*~(1 71 qms*)(1.51 qms*)(1.56 Gms*) 22 hrs 10 10 10 10 46 hrs 15 14 15 15 96 hrs 24 22 24 23 184 hrs 37 32 34 34 234 hrs 37 32 37 35 330 hrs 51 41 48 47 * Weight o~ liner coated on inner sur~ace o~ cap.
W O 96/39338 P~CT~US96/10036 Example 2:
Polyvinylchloride plastisol in an amount of 8.40 grams was blended with 5.17 grams of 200 mesh iron cont~;n;ng 2~ sodium chloride in an electric, high-speed mixer. A sample of the resulting liner composition was coated on the inner surface of a container cap, which was placed in a 500cc mason jar containing 100cc of oxygen.
A one-eighth-inch hole was drilled in the lid o~ the mason jar with a septum placed over the hole to prevent oxygen from leaking out o~ the container. The container was le~t at room temperature at 100~ relative humidity within the jar, and the amount of oxygen absorbed by the liner over time was measured. The procedure was repeated two times using different weight samples of liner within the cap. The results are tabulated below.
Oxygen Absorbed Over Time (cc) Sample Sample Sample Average #1 #2 #3 Time (1.47 qms*)(1.71 qms*)(1.51 qms*)(1.56-qms*) 22 hrs 8 8 8 8 46 hrs 12 12 12 12 96 hrs 26 19 21 22 184 hrs 46 30 30 35 234 hrs 52 33 30 38 330 hrs 61 43 41 48 * Weight of liner coated on inner surface of cap.
The results of both Examples 1 and 2 show good oxygen absorption using the present invention. Using the invention, the results are achieved with reduced material ; and fabrication time.
Although illustrated and described herein with re~erence to certain specific embodiments, the present invention is nevertheless not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents o~ the claims and without departing from the spirit of the invention.
Claims (7)
1. A container cap comprising:
a base portion having a perimeter;
a substantially cylindrical portion extending perpendicularly from said perimeter of said base portion and defining an inner surface of said container cap; and an entirely uncovered resin layer disposed in direct contact with said inner surface of said container cap, said layer having an oxygen absorbent dispersed throughout, whereby said container cap is adapted to seal an opening in a container and to absorb oxygen within said container.
a base portion having a perimeter;
a substantially cylindrical portion extending perpendicularly from said perimeter of said base portion and defining an inner surface of said container cap; and an entirely uncovered resin layer disposed in direct contact with said inner surface of said container cap, said layer having an oxygen absorbent dispersed throughout, whereby said container cap is adapted to seal an opening in a container and to absorb oxygen within said container.
2. A container cap as claimed in claim 1 wherein said liner is polyvinylchloride plastisol.
3. A container cap as claimed in claim 1 wherein said oxygen absorbent is selected from the group consisting of iron, aluminum, copper, zinc, titanium, magnesium, tin, sodium, manganese, iodine, sulphur, phosphorus, sodium chloride, sodium sulfate, potassium chloride, ammonium chloride, ammonium sulfate, calcium chloride, sodium phosphate, calcium phosphate, glucose oxidase, and magnesium chloride.
4. (Amended) A method for removing oxygen from a container comprising:
dispersing an oxygen absorbent throughout a resin liner;
attaching the liner, entirely uncovered, immediately on an inner surface of a container cap without a separate adhesive; and placing the cap over an opening in the container such that the liner in the container cap seals the opening and absorbs oxygen within the container.
dispersing an oxygen absorbent throughout a resin liner;
attaching the liner, entirely uncovered, immediately on an inner surface of a container cap without a separate adhesive; and placing the cap over an opening in the container such that the liner in the container cap seals the opening and absorbs oxygen within the container.
5. A method as claimed in claim 4 wherein the liner is polyvinylchloride plastisol.
6. A method as claimed in claim 4 wherein the liner is attached to the inner surface of the container cap by spraying the liner in liquid form onto the inner surface.
7. A method as claimed in claim 4 wherein the oxygen absorbent is selected from the group consisting of iron, aluminum, copper, zinc, titanium, magnesium, tin, sodium, manganese, iodine, sulphur, phosphorus, sodium chloride, sodium sulfate, potassium chloride, ammonium chloride, ammonium sulfate, calcium chloride, sodium
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47157395A | 1995-06-06 | 1995-06-06 | |
| US08/471,573 | 1995-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2221472A1 true CA2221472A1 (en) | 1996-12-12 |
Family
ID=23872145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002221472A Abandoned CA2221472A1 (en) | 1995-06-06 | 1996-06-06 | An oxygen absorbing container cap liner |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0833783B1 (en) |
| JP (1) | JPH11507314A (en) |
| AT (1) | ATE195482T1 (en) |
| AU (1) | AU718600B2 (en) |
| BR (1) | BR9608337A (en) |
| CA (1) | CA2221472A1 (en) |
| DE (1) | DE69609836D1 (en) |
| DK (1) | DK0833783T3 (en) |
| NZ (1) | NZ310839A (en) |
| WO (1) | WO1996039338A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7185780B2 (en) * | 2003-12-15 | 2007-03-06 | Sonoco Develpoment, Inc. | Container overcap with drying agent layer |
| WO2020106525A1 (en) | 2018-11-19 | 2020-05-28 | Jeremy Exley | Aged spirit preservation systems and devices |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3695477A (en) * | 1970-05-18 | 1972-10-03 | Grace W R & Co | Plastisols and gaskets |
| US3866845A (en) * | 1973-05-18 | 1975-02-18 | Klm Company | Container closure with liner and methods of making the same |
| US4287995A (en) * | 1978-11-30 | 1981-09-08 | Mitsubishi Gas Chemical Company, Inc. | Container sealing member with oxygen absorbent |
| FR2611184B1 (en) * | 1987-02-19 | 1989-05-26 | Rical Sa | WATERPROOF SEALING DEVICE FOR CONTAINERS CONTAINING PRODUCTS WHICH MUST BE KEEPED AWAY FROM OXYGEN |
| BR9106400A (en) * | 1990-05-02 | 1993-05-18 | Zapata Industries Inc | POLYMERIC COMPOSITES CONTAINING OXYGEN ELIMINATING COMPOUNDS |
| JPH04339772A (en) * | 1991-05-09 | 1992-11-26 | Toyo Seikan Kaisha Ltd | Container lid with liner and production thereof |
-
1996
- 1996-06-06 BR BR9608337A patent/BR9608337A/en active Search and Examination
- 1996-06-06 JP JP9502171A patent/JPH11507314A/en active Pending
- 1996-06-06 DK DK96919353T patent/DK0833783T3/en active
- 1996-06-06 EP EP96919353A patent/EP0833783B1/en not_active Expired - Lifetime
- 1996-06-06 WO PCT/US1996/010036 patent/WO1996039338A1/en active IP Right Grant
- 1996-06-06 AT AT96919353T patent/ATE195482T1/en active
- 1996-06-06 AU AU61710/96A patent/AU718600B2/en not_active Ceased
- 1996-06-06 CA CA002221472A patent/CA2221472A1/en not_active Abandoned
- 1996-06-06 NZ NZ310839A patent/NZ310839A/en unknown
- 1996-06-06 DE DE69609836T patent/DE69609836D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU718600B2 (en) | 2000-04-20 |
| EP0833783B1 (en) | 2000-08-16 |
| BR9608337A (en) | 1999-01-05 |
| WO1996039338A1 (en) | 1996-12-12 |
| DK0833783T3 (en) | 2000-11-20 |
| ATE195482T1 (en) | 2000-09-15 |
| JPH11507314A (en) | 1999-06-29 |
| AU6171096A (en) | 1996-12-24 |
| EP0833783A4 (en) | 1998-10-28 |
| DE69609836D1 (en) | 2000-09-21 |
| NZ310839A (en) | 1999-02-25 |
| EP0833783A1 (en) | 1998-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5839593A (en) | Oxygen absorbing container cap liner | |
| US4421235A (en) | Oxygen absorbent-containing bag and container sealing member having the same | |
| US5492742A (en) | Packages and containers comprising salicylic acid chelates as oxygen scavengers | |
| DE2948264C2 (en) | Sealing member for a preservation container | |
| JP4118945B2 (en) | Polymer composition containing oxygen scavenging compound | |
| US5202052A (en) | Amino polycarboxylic acid compounds as oxygen scavengers | |
| AU694163B2 (en) | Antimicrobial laminate and bag, container, and shaped cup using same | |
| EP0269066B1 (en) | Oxygen scavenger container used for cap | |
| AU651349B2 (en) | Polymer compositions containing oxygen scavenging compounds | |
| US6465065B1 (en) | Metal catalyzed ascorbate compounds as oxygen scavengers | |
| US6709724B1 (en) | Metal catalyzed ascorbate compounds as oxygen scavengers | |
| EP0833783B1 (en) | An oxygen absorbing container cap liner | |
| AU743564B2 (en) | An oxygen absorbing container cap liner | |
| AU4872600A (en) | An oxygen absorbing container cap liner | |
| MXPA97009989A (en) | Cover lid for oxygen absorbing container | |
| EP0785891B1 (en) | Inhibition of the growth of micro-organisms | |
| JP4370630B2 (en) | Oxygen absorbing container lid | |
| JPH06255680A (en) | Deoxidizer-containing polymeric composition | |
| JP2615985B2 (en) | Crown cap and method of manufacturing the same | |
| JP3114896B2 (en) | Container lid with excellent long-term storage | |
| JPH0885564A (en) | Container top | |
| JPS63281930A (en) | Gas filling and packing method | |
| JPH0424864Y2 (en) | ||
| JP3786140B2 (en) | Packaging container | |
| JP2003012013A (en) | Container lid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |