GB2101870A - Oxygen absorbent packaging - Google Patents
Oxygen absorbent packaging Download PDFInfo
- Publication number
- GB2101870A GB2101870A GB08213114A GB8213114A GB2101870A GB 2101870 A GB2101870 A GB 2101870A GB 08213114 A GB08213114 A GB 08213114A GB 8213114 A GB8213114 A GB 8213114A GB 2101870 A GB2101870 A GB 2101870A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- oxygen absorbent
- sheet
- nonwoven fabric
- package
- 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
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000001301 oxygen Substances 0.000 title claims abstract description 67
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 67
- 230000002745 absorbent Effects 0.000 title claims abstract description 56
- 239000002250 absorbent Substances 0.000 title claims abstract description 56
- 238000004806 packaging method and process Methods 0.000 title description 7
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 30
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 239000002985 plastic film Substances 0.000 claims description 6
- 229920006255 plastic film Polymers 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 9
- -1 polyethylene Polymers 0.000 description 31
- 239000004698 Polyethylene Substances 0.000 description 21
- 229920000573 polyethylene Polymers 0.000 description 21
- 239000000463 material Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 13
- 239000010410 layer Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000004775 Tyvek Substances 0.000 description 7
- 229920000690 Tyvek Polymers 0.000 description 7
- 238000012856 packing Methods 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 6
- 239000005026 oriented polypropylene Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 229920000554 ionomer Polymers 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229920013683 Celanese Polymers 0.000 description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920000131 polyvinylidene Polymers 0.000 description 2
- 239000005033 polyvinylidene chloride Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920006361 Polyflon Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 125000000816 ethylene group Polymers [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
-
- 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
- B65D81/266—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 gases, e.g. oxygen absorbers or desiccants
- B65D81/268—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 gases, e.g. oxygen absorbers or desiccants the absorber being enclosed in a small pack, e.g. bag, included in the package
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/02—Sterilising, e.g. of complete packages
- B65B55/12—Sterilising contents prior to, or during, packaging
- B65B55/19—Sterilising contents prior to, or during, packaging by adding materials intended to remove free oxygen or to develop inhibitor gases, e.g. vapour phase inhibitors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Food Science & Technology (AREA)
- Packages (AREA)
Abstract
An oxygen absorbent package comprising a plastic microporous film or nonwoven fabric sheet and another outer layer are held by means of an intermediate layer, and an oxygen absorbent being put between the microporous film and the intermediate layer characterized in that the intermediate layer has a lower softening point than the microporous film or nonwoven fabric sheet and another outer layer has a higher softening point than the intermediate layer, and the three layers are heat-sealed on the sides is disclosed. The oxygen absorbent package is mainly used for storage of foodstuff, particularly liquid or semi- liquid foodstuff.
Description
SPECIFICATION
Oxygen absorbent packaging
The present invention relates to an oxygen absorbent package using a microporous film or nonwoven fabric as at least part of material constituting the package.
Oxygen absorbents are widely used to keep oxygen out of the atmosphere in which foods and other products that do not like oxygen are stored.
But if oxygen absorbents are used in connection with the storage of moist products and materials constituting the package packing oxygen absorbents are water permeable, the moisture enters the interior of the package of the absorbent and aqueous slurry of oxygen absorbent is formed. The aqueous slurry oozes out of the package and smears the foodstuffs.
Active research and development efforts have recently been made on thin plastic films such as microporous films and nonwoven sheets. Since these thin plastic films are as highly air-permeable as paper, they can be used as a material for packaging oxygen absorbents. However, this film is usually made of a single layer of polyolefin such as polyethylene and polypropylene, so it is difficult to heat-seal the microporous film by means of conventional packaging machines. The reason is that when two sheets of mono-layerfilms are adhered by melting inside portions of the mono-layerfilm, melted film is adhered to heat-seal bars or heat rolls of machine. A special heat-sealer, such as an impulse heat-sealer is necessary in order to heatseal mono-layerfilm.When such special heat sealer is used in automatic packaging machines in order to heat-seal the mono-layer film, it is impossible to operate the automatic packaging machine at a high speed. So, when the mono-layer film is heat-sealed by impulse heat sealer, a decrease in efficiency is unavoidable. In addition, a microporous film is weakened. So a microporous film is not practical as a packaging material for packing an oxygen absorbent.
Oxygen absorbent packages using a plastic nonwoven sheet are disclosed in several prior art references. For example, Japanese Patent Publication (Kohkai) No. 2164/81 discloses a composite package including at least two layers, i.e. the plastic nonwoven sheet and an oxygen permeable but water-impermeable layer. But this package has the nonwoven sheet laminated or coated with a thermoplastic synthetic resin to reduce the inherent high gas permeability of the nonwoven sheet, so if the oxygen absorbent is put in the package, the desired oxygen removal rate is not obtained.
The present invention eliminates these defects.
An object of the present invention is to provide an oxygen absorbent package that retains the high gas permeability of plastic microporous films or nonwoven sheets and which yet can be processed by conventional packaging machines.
Another object of the present invention is to provide a waterproof oxygen absorbent package.
This invention relates to an oxygen absorbent package comprising a plastic microporous film or nonwoven fabric sheet 1 and a laminated sheet 2 comprising a plasticfilm 3 having a lower softening point that film or sheet 1 and a plastic film 4 having a higher softening point that film 3, an oxygen absorbent 5 being put between films 1 and 2 with film 3 forming the inner layer, the three layers being heat sealed on the sides.
This invention also relates to an oxygen absorbent package comprising a rectangular microporous film or a nonwoven fabric sheet 11, a rectangular perforated film or nonwoven fabric sheet 13 having a lower softening point than film or sheet 11, a rectangular microporous film or nonwoven fabric sheet 14 having a higher softening point than film or sheet 13, and an oxygen absorbent 15, film or sheet 13 being disposed between film or sheet 11 and film or sheet 14, and oxygen absorbent 15 being disposed between 11 and 13, the three layers being heat sealed on the sides.
Figure 1 shows a first embodiment of the package of this invention and is a fragmentary sectional view of the package.
Figures 2 and 3 show a second embodiment of the packages of this invention, and are a fragmentary sectional view of the packages.
By the term "microporous film" is meant a film having a plurality of fine openings and being gas-permeable, but water-impermeable when there is no difference between pressure outside the bog and pressure in the bag. The size of the openings is preferably in the range of 0.01 - 50 microns, and a distance across the short axis is less than 2 microns.
Materials constituting the film include plastics, such as polyethylene, polypropylene, poly(fluorinated ethylene) and the like. The microporous film employed in the practice of this invention may be prepared by: cold orientation of film; orientation of different substance-containing film; extraction of different substance from differentsubstance- containing film; extraction of different substancecontaining film, followed by orientating the sotreated film; laminatings of non-woven fabrics; cross dispersing of bundle of fibers, followed by heat-pressing the resulting material; and irradiation of film with electron beam.For example, suitable microporous films are commercially available, and are sold under the names of Celgard (Celanese
Corp.), FP-2 (Asahi Chemical Industry), NOP (Nippon
Oil Chemical Co., Ltd.), Nitto Flon (NTF) (Nitto
Electric Industrial Co., Ltd.), Cellpore NW01 (Sekisui
Chemical Co., Ltd.), Polyflon Paper (Daikin Industry
Co.), NF sheet (Tokuyama Soda Chemical Co.) and so on.
In general the film has an air permeability of 0.01 10,000 sec/100 ml air, preferably 1 -1,000 sec/100 ml air according to JIS P81 17.
The nonwoven fabric sheets may be prepared by bonding fibers of plastics, such as polyethylene, polypropylene, polyfluoroethylene, polyester or polyamine by means of heat, pressure or adhesive.
Nonwoven fabric sheets prepared by bonding long plastic fiber by means of heat or pressure. For example, suitable nonwoven fabric sheets are commercially available, and are sold under the names of
TYVEK (E.I. Du Pont).
In General, the nonwoven fabric sheet which is used as outer materials, has an air permeability of 0.01 - 10,000 sec/100 ml air, preferably 1 - 1,000 sec/100 ml air according to JIS P81 17. The sheet is gas-permeable, but water-impermeable when there is no difference between pressure outside the bag and pressure in the bag.
When nonwoven fabric sheets are used as outside materials 1, 11 or 14 of the package, it is preferable that the nonwoven fabric sheets constituting the outside materials of the package have tensile strength above 10 Kg/15 mm, burst strength above 5
Kg/cm2 and tear strength above 1 Kg. When nonwoven fabric sheets having such strengthes are used as outside materials of the oxygen absorbent package, the package is not broken during handling of the package, or after the package has been packed with foodstuff.
However, it is unnecessary that the nonwoven fabric sheet which is used as an intermediate has such strengthes and air permeability. Any of the commercially available non-woven fabric sheets may be used as an intermediate layer.
The term "oxygen absorbent" in the specification and the claims means an agent for absorbing or removing oxygen present in the atmosphere of the container. Examples of the oxygen absorbents employed in the practice of this invention are disclosed in U.S. Patent No.4,113,652 by Yoshikawa petal patented on September 1978; U.S. Patent No.
4,104,192 by Yoshikawa et al patented on August 1, 1978; U.S. Serial No.816,135 by Ohtsuka et al filed on May 1977; U.S. Patent No.4,127,503 patented on November 1978; U.S. Serial No.855,316 by
Komatsu etalfiledon November 1977 and U.S.
Serial No. 934,489 by Yoshikawa et al filed on August 17,1978 which are incorporated herein. Examples of the oxygen absorbents include reducing agent, such as iron powder, oxalates, sulfites, hydrogen sulfites, dithionites, pyrogallol, Rongalit, glucose, copper amine complex, zinc powder and the like, and any composition containing the reducing agent. A solid oxygen absorbent, a solid carrier impregnated with a liquid or semi-liquid oxygen absorbent, or a liquid or semi-liquid oxygen absorbent can be used as the oxygen absorbent of this invention. The solid oxygen absorbent and the solid carrier impregnated with the liquid or semi-liquid oxygen absorbent are preferred.
By the term "perforated film" is meant a plastic film through holes of 0.1 - 3 mm.
Films or nonwoven fabric sheets 3 and 13 having a lower softening point than film or sheet 1 and 11 include, for example, films or nonwoven fabric sheets made of polyethylene, polypropylene, ethylene-vinyl acetate copolymer and polyethylene ionomer and the like.
In general, the difference between a softening point of film or sheet 1 and 11 and that of film or sheet 3 and 13 may be above 5"C, preferably above 10"C and most preferably above 20"C. So, materials constituting film or sheet 3 and 13 depends upon materials constituting film or sheet 1 and 11.
Similarly, the difference between a softening point of film or sheet 3 and 13 and that of film or sheet 4 and 14 may be above 5"C, preferably above 10 C and most preferably above 20"C. Film or sheet 1 and 11 and film or sheet 4 and 14 may be made of the same or different material.
Figure 1 shows first embodiment. The elements are: microporous film or nonwoven fabric sheet 1, film 3 having a lower softening point than 1,film 4 having a high softening point than 3 and oxygen absorbent 5. Laminate sheet 2 may be prepared by extrusion-coating film 3 on film 4, adhereing film 3 to film 4; pressing films 3 and 4; or forming film 3 on film 4 by coating a resin solution on film 4. Materials constituting film 4 are polyethylene terephthalate, polyamide or polypropylene.
In general, thickness of film 1 may be in the range of 20 - 500 Lt, preferably 50 - 200 jt, and thickness of laminate sheet 2 may be in the range of 20 - 200 jt, and preferably 50 - 100 xLt.
The package of this embodiment may be prepared by putting an oxygen abosrbent between film 1 and laminate sheet 2 with film 3 forming the inner layer followed by heat-sealing the three layers on the sides.
According to the present invention, more effective oxygen absorption can be achieved by embossing the outer surface of (1) since air can flow between adjacent ridges even when the outer surface of (1) is put into close contact with the product to be stored.
When printing is carried out on inner surface of film 4 or outer surface of film 3, the contents do not contact the printing ink.
Figures 2 and 3 show second embodiment. The elements are: microporous film or nonwoven fabric sheet 11, perforated film or nonwoven fabric sheet 13 having a lower softening point than film or sheet 11, microporous film or nonwoven fabric 14 having a higher softening point than film or sheet 13 and an oxygen absorbent 15. In Figure 2, an intermediate perforated film is bonded to one on the outer layers.
In Figure 3, the intermediate film is not bonded to any one of the outer layers. The package of this embodiment may be prepared by putting an oxygen absorbent between 11 and 13, followed by heatsealing the three layers on the sides.
According to the present invention, more effective oxygen absorption can be achieved by embossing the outer surface of 11 or 14 since air can flow between adjacent ridges even when the outer surface of 11 or 14 is put into close contact with the product to be stored.
The packages as explained above can be used for preserving foodstuffs. For example, when the package is packed with foodstuff in a package film so as to seal the package and the foodstuff, the oxygen absorbent contained in the package absorbs oxygen present in the package, whereby putrefaction or change in quality of the foodstuff can be prevented.
The packages can be also used for preserving materials other than foodstuffs.
Since the film or sheet constituting outside material of the package is water impermeable, the bag can be packed with liquid or semi-liquid foodstuffs.
In this case, the oxygen absorbent present in the package is completely prevented from contact with the liquid or semi-liquid foodstuffs of a container.
The packages of the present invention can be prepared at a high speed by using an ordinary heat seal machine.
This invention is now described in greater detail by reference to the following exmaples which are given here for illustrative purposes only and are by no means intended to limit the scope of the invention.
Example 1
An ethylene-vinyl acetate copolymer film was extrusion-coated onto a polyehtylene terephthalate film (15 thick) to form a laminated film 50 ,Lt thick.
The laminated film was heat-sealed to a polyethylene microporous film (Cellpore of Sekisui
Chemical Co., Ltd.) on three sides in such a manner that the ethylene-vinyl acetate side faces inward, then 3 g of an oxygen absorbent composition was put in the individual envelopes at a rate of 80 shots/min, and thereafter, the remaining open side was heat-sealed, to thereby provide oxygen absorbent packages (50 mm x 50 mm, seal width 5 mm).
Each package was put in a laminated bag of oriented polypropylene film which is coated by polyvinylidenechloride and of polyethylene film together with cotton impregnated with 10 ml of water. The bag was filled with 500 ml of air and left at 25"C. Ten hours later, the oxygen concentration in the bag was reduced to 0.0086%.
Example 2 A polyamidefilm (15 ,Lt thick) was dry-laminated with a polyethylene film (20 ,Lt thick). The resulting laminated film and a polyethylene nonwoven sheet (TYVEK of Du Pont, U.S.A., 160 ii thick) were loaded in a fast 4-side sealing/packing macine, in such a manner that the polyethylene film faced inward. As the laminated film and nonwoven sheet were heatsealed with hot rolls, 3 g of an oxygen absorbent was supplied at a rate of 80 shots/min, to thereby provide oxygen absorbent packages (50 mm x 50 mm, seal width: 5mm). Each package was put in a laminated bag of oriented polypropylene film which is coated by polyvinylidenechloride and polyethylene film together with cotton impregnated with 10 ml of water. The bag was filled with 500 ml of air and left at 25"C.Ten hours later, the oxygen concentration in the bag was reduced to 0.063%
Example 3
An ethylene-vinyl acetate copolymerfilm (40 ,Lt) having through holes of 0.2 mm, distance of which is 1 mm was laminated with a nonwoven sheet (TYVEK of Du Pont, U.S.A.,170,Llthick). The resulting laminated film and a polyethylene nonwoven fabric sheet (TYVEK of Du Pont, U.S.A., 170 thick) were loaded in a fast 4-side sealing/packing machine, in such a manner that the polyethylene film faced inward.As the laminated film and nonwoven sheet were heat-sealed with hot rolls, 3 g of oxygen absorbent (composition obtained by mixture 100 parts by weight of iron powder and 2 parts by weight of a 20 wt% NaCI aqueous solution and drying the mixture) was supplied at a rate of 80 shots/min to thereby provide oxygen absorbent packages (50 mm x 50 mm, seal width: 5 mm). Each package was put in a laminated bag of polyvinylidene film and oriented polypropylene film together with cotton impregnated with 10 ml of water. The bag was filled with 500 ml of air and left at 25"C. Ten hours later, the oxygen concentration in the bag was reduced to 0.018%.
Example 4
A polyethylene nonwoven fabric sheet (TYVEK of
Du Pont, U.S.A., 170 ythick) and a polypropylene microporous film (Celgard of Celanese Corp., 50 u thich) having polyethylene ionomer film (40 ;l) having through holes of 0.3 mm, the distance of which is 7 mm were loaded in a fast 4-side sealing packing machine. As the laminated film and nonwoven sheet were heat-sealed with hot rolls, 3 g of oxygen absorbent (composition obtained by mixture 100 parts by weight of iron powder and 2 parts by weight of a 20 wt% NaCI aqueous solution and drying the mixture) was supplied at a rate of 80 shots/min to thereby provide oxygen absorbent packages (50 mm x 50 mm, seal width: 5 mm).Each package was put in a laminated bag of polyvinylidene film and oriented polypropylene film together with cotton impregnated with 10 ml of water. The bag was filled with 500 ml of air and left at 25"C. Ten hours later, the oxygen concentration in the bag was reduced to 0.025%.
Example 5
An ethylene-vinyl acetate copolymer film (40 u thick) with 0.2 mm perforations 1 mm apart was in a grid pattern laminated with a sheet of nylon "Spun
Bond" (productofAsahi Chemical Industry Co., Ltd.) 100 CL thick. The laminated film and a polyethylene nonwoven sheet (TYVEK of Du Pont, U.S.A., 170 CL thick) were loaded in a high-speed 4-side packing machine in such a manner that the ethylene-vinyl acetate copolymer film was in contact with the nonwoven sheet.As the laminated film and nonwoven sheet were heat-sealed with hot rolls, 3 g of an oxygen absorbent composition (a composition prepared by drying a mixture of 100 parts of iron powder and 2 parts of 20% aqueous NaCI) was supplied at a rate of 80 shots/min to make oxygen absorbent packages (50 mm x 50 mm, seal width: 5 mm). Each package was put in a laminated bag of polyethylene film and oriented polypropylene film together with cotton impregnated with 10 ml of water.The bag was filled with 500 ml of air and left at 25"C. Ten hours later, the oxygen concentration in the bag was reduced to 0.018%;
Example 6
Two polyethylene nonwoven sheets (TYVEK of Du
Pont, U.S.A., 170 thick sandwiching a polyethylene ionomerfilm (40 Ltthick) with 0.3 mm perforations 7 mm apart in a grid pattern, were loaded in a high-speed 4-side packing machine. As the three films were heat-sealed with hot rolls, 3 g of an oxygen absorbent (a composition prepared by drying a mixture of 100 parts of iron powder and 2 parts of 20% aqueous NaCI) was put between the nonwoven sheet and one polyethylene ionomer film at a rate of 80 shots/min to thereby make oxygen absorbent packages (50 mm x 50 mm, seal width: 5 mm). Each package was put in a laminated bag of polyethylene film and oriented polypropylene film together with cotton impregnated with 10 ml of water. The bag was filled with 500 ml of air and left at 25"C. Ten hours later, the oxygen concentration in the bag was reduced to 0.020%.
Claims (6)
1. An oxygen absorbent package comprising a plastic microporous film or nonwoven fabric sheet and another outer layer held by means of an intermediate layer, and an oxygen absorbent located between the microporous film or nonwoven fabric sheet and the intermediate layer, characterized in that the intermediate layer has a lower softening point than the microporous film or nonwoven fabric sheet and the other outer layer has a higher softening point than the intermediate layer, and the three layers are heat-sealed on the sides.
2. An oxygen absorbent package according to
Claim 1 wherein the intermediate layer and the other outer layer are different plastic films, and the both films are laminated.
3. An oxygen absorbent package according to
Claim 1 wherein the intermediate layer is a perforated film or nonwoven fabric sheet and the other outer layer is a plastic microporous film or nonwoven fabric sheet.
4. An oxygen absorbent package according to
Claim 3 wherein the intermediate layer and the other outer layer are laminated.
5. An oxygen absorbent package according to
Claim 3 wherein the intermediate layer and the other outer layer are not laminated.
6. An oxygen absorbent according to Claim 1 and substantially as described herein with particular reference to any one of Figures 1 to 3 of the accompanying drawings.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56068650A JPS57183965A (en) | 1981-05-07 | 1981-05-07 | Package of deoxidizer |
| JP56071170A JPS57194961A (en) | 1981-05-12 | 1981-05-12 | Package of deoxidizer |
| US06/377,154 US4485133A (en) | 1981-05-07 | 1982-05-11 | Oxygen absorbent packaging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2101870A true GB2101870A (en) | 1983-01-26 |
| GB2101870B GB2101870B (en) | 1985-07-10 |
Family
ID=27299807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08213114A Expired GB2101870B (en) | 1981-05-07 | 1982-05-06 | Oxygen absorbent packaging |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR850001957B1 (en) |
| DE (1) | DE3217273A1 (en) |
| GB (1) | GB2101870B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151489A2 (en) * | 1984-02-09 | 1985-08-14 | Mitsubishi Gas Chemical Company, Inc. | Package containing quality-retaining agent |
| EP0374301A1 (en) * | 1988-12-23 | 1990-06-27 | Frisco-Findus Ag | Packaged product |
| EP0730059A2 (en) * | 1995-03-03 | 1996-09-04 | Renzo Stellini | Method for improving fabrics made of natural or synthetic fibers, and textile material obtained with the method |
| US5729956A (en) * | 1996-04-23 | 1998-03-24 | Apex Medical Technologies, Inc | Aqua ammonia production by desorption |
| EP0831033A1 (en) * | 1996-09-19 | 1998-03-25 | United Catalysts, Inc. | Disiccant container |
| GB2328603A (en) * | 1997-09-01 | 1999-03-03 | Usai Akio | Viscous liquid deoxidizer and deoxidizing sheet made therefrom |
| WO2012164315A3 (en) * | 2011-06-03 | 2013-02-21 | Emco Packaging Systems Ltd. | Active oxygen scavenging system |
| WO2012156685A3 (en) * | 2011-05-18 | 2013-03-07 | Emco Packaging Systems Ltd. | Packaging inclusion for controlling or modifying the atmosphere in packaging |
| CN106687390A (en) * | 2014-03-27 | 2017-05-17 | 安万托特性材料有限责任公司 | Package system and method for inhibiting moisture entry |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013114010A1 (en) * | 2013-12-13 | 2015-06-18 | Aesculap Ag | Packaging containers for medical products, in particular implants |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1188170A (en) * | 1967-12-22 | 1970-04-15 | American Can Co | De-Oxygenated Packages and Sheet Material for Forming same |
-
1982
- 1982-05-06 GB GB08213114A patent/GB2101870B/en not_active Expired
- 1982-05-07 KR KR8201986A patent/KR850001957B1/en active
- 1982-05-07 DE DE19823217273 patent/DE3217273A1/en active Granted
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151489A2 (en) * | 1984-02-09 | 1985-08-14 | Mitsubishi Gas Chemical Company, Inc. | Package containing quality-retaining agent |
| EP0151489A3 (en) * | 1984-02-09 | 1986-12-03 | Mitsubishi Gas Chemical Company, Inc. | Package containing quality-retaining agent |
| EP0374301A1 (en) * | 1988-12-23 | 1990-06-27 | Frisco-Findus Ag | Packaged product |
| EP0730059A3 (en) * | 1995-03-03 | 1998-05-13 | Renzo Stellini | Method for improving fabrics made of natural or synthetic fibers, and textile material obtained with the method |
| EP0730059A2 (en) * | 1995-03-03 | 1996-09-04 | Renzo Stellini | Method for improving fabrics made of natural or synthetic fibers, and textile material obtained with the method |
| US5729956A (en) * | 1996-04-23 | 1998-03-24 | Apex Medical Technologies, Inc | Aqua ammonia production by desorption |
| EP0831033A1 (en) * | 1996-09-19 | 1998-03-25 | United Catalysts, Inc. | Disiccant container |
| CN1080692C (en) * | 1996-09-19 | 2002-03-13 | 苏德-化学公司 | Desiccant container |
| GB2328603A (en) * | 1997-09-01 | 1999-03-03 | Usai Akio | Viscous liquid deoxidizer and deoxidizing sheet made therefrom |
| GB2328603B (en) * | 1997-09-01 | 1999-10-20 | Akio Usui | Viscous Liquid Deoxidizer, Deoxidizing Sheet Made Thereof and Manufacturing Method for Deoxidizing Sheet |
| WO2012156685A3 (en) * | 2011-05-18 | 2013-03-07 | Emco Packaging Systems Ltd. | Packaging inclusion for controlling or modifying the atmosphere in packaging |
| WO2012164315A3 (en) * | 2011-06-03 | 2013-02-21 | Emco Packaging Systems Ltd. | Active oxygen scavenging system |
| CN106687390A (en) * | 2014-03-27 | 2017-05-17 | 安万托特性材料有限责任公司 | Package system and method for inhibiting moisture entry |
| EP3122654A4 (en) * | 2014-03-27 | 2017-12-27 | Avantor Performance Materials, LLC | Package system and method for inhibiting moisture entry |
| CN106687390B (en) * | 2014-03-27 | 2019-09-13 | 安万托特性材料有限责任公司 | Packaging system and method for inhibiting moisture to enter |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2101870B (en) | 1985-07-10 |
| KR830009938A (en) | 1983-12-24 |
| KR850001957B1 (en) | 1985-12-31 |
| DE3217273A1 (en) | 1983-03-03 |
| DE3217273C2 (en) | 1989-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20020505 |