GB2179002A - Package structure - Google Patents
Package structure Download PDFInfo
- Publication number
- GB2179002A GB2179002A GB08615996A GB8615996A GB2179002A GB 2179002 A GB2179002 A GB 2179002A GB 08615996 A GB08615996 A GB 08615996A GB 8615996 A GB8615996 A GB 8615996A GB 2179002 A GB2179002 A GB 2179002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- rust
- composite sheet
- article
- package structure
- 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.)
- Withdrawn
Links
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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/26—Articles or materials wholly enclosed in laminated sheets or wrapper blanks
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- 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
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
-
- 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
- B32B2323/00—Polyalkenes
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/80—Medical packaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Abstract
A package structure for holding an article in a rust-proof manner, the package structure comprising a composite sheet comprising a core sheet e.g. aluminium, in the center, a first layer of polyolefin resin containing a vaporisable anti-rust substance, and a second layer having air-barrier properties; wherein the composite sheet is folded with the first layer facing inwards, and wherein the periphery of the folded composite sheet is thermally sealed with an article contained therein.
Description
SPECIFICATION
Package structure
The present invention relates to a package structure for storing an article in a rust-proof manner, and has been particularly developed for packaging and sealing cutting blades such as razor blades and blades for surgical instruments such as scalpels.
Surgical scalpel blades are generally made of carbon steel, and normally they are individually wrapped in rust-preventing paper, which is available as a water-proof wrapper. Several sealed blades are jointly packaged in a plastics film. Aluminum foil is sometimes used as a packaging material. Every precaution is taken to prevent moisture from corroding the blades.
Nevertheless it is very difficult to avoid the problem of corrosion with articles such as scalpel blades, which require a high degree of moisture exclusion. This is partly due to the carbon steel construction of the blade. As mentioned above metal foil such as aluminum foil may be used to provide an air-tight package, but the problems cannot be completely solved in this way. Therefore extra processes are required to secure the rust-preventing packaging. This leads to time and labor-consuming packaging operations, thereby resulting in increased production costs.
A proposal has been made for avoiding such problems, according to which a rust-preventing film containing a vaporisable anti-rust agent is used. However a new problem has arisen in that the agent is decomposed when a germ-killing treatment is applied to the packaged article thermally or by radiation e.g. with gamma rays. As a result of such decomposition an unexpected gas is generated which tends to corrode the articles in the packages. For example when the agent contains ethylene vinylacetate, acetic acid is generated and corrodes the article contained in the package. In addition the plastic constituent of the packaging material may be decomposed so as to generate acetic acid.
According to the present invention there is provided a package structure for storing an article in a rust-proof manner, the package structure comprising:
a composite sheet comprising a core sheet in the center, a first layer comprising or coated with polyolefin resin containing a gasifiable anti-rust substance and a second layer comprising or coated with anti-oxidizing substance;
wherein the composite sheet is folded with the first layer facing inwards, and
wherein the periphery of the folded composite sheet is sealed with an article contained therein.
The invention also provides a packaging material for storing an article in a rust-proof manner, the material comprising:
a composite sheet comprising a core sheet in the center;
a first layer coated with polyolefin resin containing a gasifiable anti-rust substance and a second layer coated with anti-oxidizing substance; and
wherein the composite sheet is foldable with the first layer facing inwards.
Embodiments of the invention will now be described by way of example with reference to the drawings, in which:
Figure I is a vertical cross-section through a composite sheet used in carrying out the present invention;
Figure 2 is a perspective view showing a package structure embodying the present invention;
Figure 3 is a perspective view showing a modification to the package structure shown in Figure 2;
Figures 4 to 6 inclusive show an example of a scalpel for surgical use; and
Figures 7 and 8 inclusive are diagrammatic views showing a method of conducting an experiment.
As shown in Figure 1 a packaging composite sheet 4 comprises a first layer 2 and a second layer 3 with a core layer 1 interposed therebetween, the layer 1 being an aluminum foil having a thickness of 40 microns. The layers 1, 2 and 3 are securely bonded together. The layer 2 is a film having a thickness of 3 microns, which is made of a mixture of polyethylene resin, which contains 3% by weight of dicyclohexyl aminonitrite, and ethylene ionomer resin. The layer 3 is a film coated with or comprising nitrocellulose resin. The layer 2 is intended for anti-rust and thermal sealing, and the layer 3 has anti-oxidizing properties. As shown in Figure 2 the sheet 4 is folded so as to accommodate an article 5, such as a scalpel blade, therein.In this case the layer 2 faces inwards, that is, towards the article 5, and the open edges of the folded sheet 4 are thermally sealed as shown in Figure 2. Alternatively, all the periphery can be thermally sealed as shown in Figure 3.
The sealed unit is indicated by the reference numeral 7, hereinafter referred to as the package. The package 7 is subjected to sterilizing treatment by the use of cobalt-60 rays. Experiments have demonstrated that the sealing strength is not affected by the gamma rays.
Figures 4 to 6 show a surgical scalpel having replacement blades which may be packaged according to the invention.
A surgical scalpel 101 has a shank 102 and a disposable blade 103. The shank includes grooves 104 at its tip portion for releasably fixing the blade 103 to the shank. The sides of a slot 106 in the blade 103 are slid into the grooves 104 while the blade is transversely resiliently bent, the wider opening 105 permitting the sliding movement to be started and accommodating the rear part of the tip portion when the blade has been fully slid into position. The blade is removed by the reverse series of operations i.e. bending its rear portion upwards and sliding it out of the grooves 104.
To ascertain the effect of rust prevention using the present invention the experiment shown in Figure 7 and 8 was conducted:
The package 7a comprises a film 11 of polyester resin having a thickness of 50 micron, the film having a coating layer 12 of polyethylene resin to a thickness of 15 micron. The film 11 was further coated with polyolefin emulsion to a thickness of 3 micron, the coating film being indicated by the reference numeral 1 3a. Another package 7b was similar to package 7a but film 1 3a was replaced by film 1 3b which was made of polyolefin emulsion containing 1.0% by weight of dicyclohexyl aminonitrite. Each wrapped package was 50 mm x 70 mm, and the width of the thermal seal was 10 mm.The two wrapped packages 7a and 7b were half immersed in a 3% sodium chloride solution in a container 10 as shown in Figure 8, the solution being heated to 40"C. The changes were observed, and the results are shown in Table 1:
TABLE I
1st Week 2nd Week 3rd Week 4th Week wrapped package 7a tip overall",, - wrapped package 7b - - - no change Corrosion occurred in the tip portion alone of the blade.
Corrosion occurred on all surfaces of the blade.
For the vaporisable substances mentioned above, the known substances can be used; for example, dicyclohexyl aminonitrite, cyclohexyl aminocarbonate, amylamino benzoate, diisopropyl amino nitrite, methylcyclohexyl aminocarbonate or octadecyl amine.
For the thermal sealing plastics ethylene ionomers or ethylene ionomers or polypropylene can be used. The ratios of the first-mentioned substance to the second-mentioned substance are in the range of 99.9-to-0.1 to 90.0-to-10.0. The thicknesses of the first layer and the second layer are in the range of 1 to 20 microns. If the amount of the anti-rust substance exceeds 10% by weight the thermal sealing ability is reduced. For the metal foil, aluminum foil is preferably used.
As is evident from the foregoing description, the package structure described ensures that no change occurs in the packaging material even under heat or radiation treatment, such as germ-killing treatment by radiation, is applied thereto. The package structure ensures that the article wrapped therein is kept safe from moisture over a long period of time. The confined vaporisable agent effectively vaporizes in the package, thereby protecting the article against becoming rusty. The outer (second) layer is effective to prevent air from entering the package. The necessity of wrapping each article by hand has been avoided thereby leading to labor-saving packing performance, and the surgical blades can be safely packaged, thereby making it possible to export them over a long distance and to humid areas.
Claims (4)
1. A package structure for storing an article in a rust-proof manner, the package structure comprising:
a composite sheet comprising a core sheet in the center, a first layer coated with polyolefin resin containing a vaporisable anti-rust substance and a second layer coated with anti-oxidizing substance;
wherein the composite sheet is folded with the first layer facing inwards; and
wherein the periphery of the folded composite sheet is thermally sealed with an article contained therein.
2. A packaging material for storing an article in a rust-proof manner, the material comprising:
a composite sheet comprising a core sheet in the center;
a first layer coated with polyolefin resin containing a vaporisable anti-rust substance and a second layer coated with anti-oxidizing substance; and
wherein the composite sheet is foldable with the first layer facing inwards.
3. A structure according to claim 1, which contains a surgical blade.
4. A structure according to claim 1, substantially as described with reference to Figures 1 and 2 or 3 of the drawings.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10136985 | 1985-07-02 | ||
JP12859686A JPS62109780A (en) | 1985-07-02 | 1986-06-03 | Packaging structure |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8615996D0 GB8615996D0 (en) | 1986-08-06 |
GB2179002A true GB2179002A (en) | 1987-02-25 |
Family
ID=26442249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08615996A Withdrawn GB2179002A (en) | 1985-07-02 | 1986-07-01 | Package structure |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3622206A1 (en) |
GB (1) | GB2179002A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2724341A1 (en) * | 1994-11-11 | 1996-03-15 | Nawrot Gmbh Spezialpapier Und | Composite packaging film with outer layer of poly:olefin terephthalate, poly:olefin, poly:amide, natural fibres or paper |
CN101927878A (en) * | 2010-08-06 | 2010-12-29 | 天津市天发重型水电设备制造有限公司 | Rustproof packing method for mirror plate in combined bearing of water wheel generator |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19512349C1 (en) * | 1995-04-01 | 1996-10-24 | Betek Bergbau & Hartmetall | Tool |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB627801A (en) * | 1946-05-07 | 1949-08-16 | Bataafsche Petroleum | A process for protecting metals against corrosion, anti-corrosive packing material and the manufacture thereof |
CH509152A (en) * | 1967-12-20 | 1971-06-30 | American Can Co | Flexible sheet material for packaging foodstuffs having |
-
1986
- 1986-07-01 GB GB08615996A patent/GB2179002A/en not_active Withdrawn
- 1986-07-02 DE DE19863622206 patent/DE3622206A1/en not_active Ceased
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2724341A1 (en) * | 1994-11-11 | 1996-03-15 | Nawrot Gmbh Spezialpapier Und | Composite packaging film with outer layer of poly:olefin terephthalate, poly:olefin, poly:amide, natural fibres or paper |
GB2294902A (en) * | 1994-11-11 | 1996-05-15 | Nawrot Hermann Spezialpapgmbh | Composite packing sheets |
CN101927878A (en) * | 2010-08-06 | 2010-12-29 | 天津市天发重型水电设备制造有限公司 | Rustproof packing method for mirror plate in combined bearing of water wheel generator |
Also Published As
Publication number | Publication date |
---|---|
DE3622206A1 (en) | 1987-01-15 |
GB8615996D0 (en) | 1986-08-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |