CA1272437A - Collapsible container made from ethylene propylene copolymer - Google Patents
Collapsible container made from ethylene propylene copolymerInfo
- Publication number
- CA1272437A CA1272437A CA000498577A CA498577A CA1272437A CA 1272437 A CA1272437 A CA 1272437A CA 000498577 A CA000498577 A CA 000498577A CA 498577 A CA498577 A CA 498577A CA 1272437 A CA1272437 A CA 1272437A
- Authority
- CA
- Canada
- Prior art keywords
- layer
- ethylene propylene
- propylene copolymer
- paper
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920001577 copolymer Polymers 0.000 title claims abstract description 47
- 239000011888 foil Substances 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 7
- 239000005977 Ethylene Substances 0.000 claims description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000000551 dentifrice Substances 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 47
- 239000000123 paper Substances 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 239000000796 flavoring agent Substances 0.000 description 8
- 235000019634 flavors Nutrition 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 239000004033 plastic Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229920000554 ionomer Polymers 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229920001169 thermoplastic Polymers 0.000 description 5
- 239000004416 thermosoftening plastic Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000000341 volatile oil Substances 0.000 description 3
- 229920003308 DuPont™ Surlyn® 1605 Polymers 0.000 description 2
- 229920003946 DuPont™ Surlyn® 1706 Polymers 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004826 seaming Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920003947 DuPont™ Surlyn® 1707 Polymers 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920003182 Surlyn® Polymers 0.000 description 1
- 229920001074 Tenite Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 150000003751 zinc Chemical class 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
- 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
- B32B15/04—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
- B32B1/00—Layered products having a general shape other than plane
-
- 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
- B32B15/12—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 paper or cardboard
-
- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
-
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/14—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with linings or inserts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
- F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/04—4 layers
-
- 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
-
- 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
- B32B2317/00—Animal or vegetable based
- B32B2317/12—Paper, e.g. cardboard
-
- 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
-
- 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
- B32B2439/40—Closed containers
-
- 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
Abstract
ABSTRACT OF THE DISCLOSURE
There is disclosed a substrate of layers of materials comprising ethylene propylene copolymer layers having sandwiched therein between a metal foil layer and a paper layer all suitably adhered to one another. It is also contemplated what the substrate be employed in fabricating a dentifrice tube.
There is disclosed a substrate of layers of materials comprising ethylene propylene copolymer layers having sandwiched therein between a metal foil layer and a paper layer all suitably adhered to one another. It is also contemplated what the substrate be employed in fabricating a dentifrice tube.
Description
~ ,~7~a~37 COLLAPSIBLE CONTAINER MADE FROM ElHYLENE PROPYLEN~ C~Y~LYM~R
FIELD OF THE INVENTION
The present invention relates broadly to the container art, and is more particularly concerned with a collapsible dispensing container of laminated wall construction in the body portion thereof, whereby product permeation and absorption, and oxygen absorption are substantially prevented in all regions of the container structure susceptible thereto.
BACKGROUND OF THE INVENTION
Collapsible tubes formed of metallic and plastic materials have long been known in the packaging field.
Extruded metal tubes are inherently brittle and repeated use not infrequently results in wall cracks so that product is exuded from a location other than the essentially rigid dispensing orifice. Of the prior art metal tubes, aluminum tubes, while probably being the least brittle, are somewhat limited in their applications since up to the present time it has not been possible to apply to the interior surfaces thereof a completely satisfactory coating, when required to prevent attack and corrosion of the metal by alkaline or acid contents and contamination of the contents by the reaction products. Notwithstanding the relatively brittle nature of a metal tube, the mentioned internal coating operation requires an additional processing step which necessarily increases the cost of the final article.
Tubes formed of polyethylene and other plastic mate-rials have enjoyed wide commercial success in the packagingof many products; however, certain other products after a time have been noted to deteriorate when contained therein.
Plastics as exemplified by polyethylene are permeable to a degree when employed in the wall thicknesses used in tubular containers, and the essential oils embodied in most dentifrices for flavoring purposes are reduced in volume during storage of the container, rendering the dentifrice less palatable. Also, the plastic container wall absorbs oxygen over a period of time and ultimately may decompose the product, which has actually been found to be the case ~;~7;~a~37
FIELD OF THE INVENTION
The present invention relates broadly to the container art, and is more particularly concerned with a collapsible dispensing container of laminated wall construction in the body portion thereof, whereby product permeation and absorption, and oxygen absorption are substantially prevented in all regions of the container structure susceptible thereto.
BACKGROUND OF THE INVENTION
Collapsible tubes formed of metallic and plastic materials have long been known in the packaging field.
Extruded metal tubes are inherently brittle and repeated use not infrequently results in wall cracks so that product is exuded from a location other than the essentially rigid dispensing orifice. Of the prior art metal tubes, aluminum tubes, while probably being the least brittle, are somewhat limited in their applications since up to the present time it has not been possible to apply to the interior surfaces thereof a completely satisfactory coating, when required to prevent attack and corrosion of the metal by alkaline or acid contents and contamination of the contents by the reaction products. Notwithstanding the relatively brittle nature of a metal tube, the mentioned internal coating operation requires an additional processing step which necessarily increases the cost of the final article.
Tubes formed of polyethylene and other plastic mate-rials have enjoyed wide commercial success in the packagingof many products; however, certain other products after a time have been noted to deteriorate when contained therein.
Plastics as exemplified by polyethylene are permeable to a degree when employed in the wall thicknesses used in tubular containers, and the essential oils embodied in most dentifrices for flavoring purposes are reduced in volume during storage of the container, rendering the dentifrice less palatable. Also, the plastic container wall absorbs oxygen over a period of time and ultimately may decompose the product, which has actually been found to be the case ~;~7;~a~37
-2- 62301-1347 with fluoride-containing toothpastes. A further disadvantage of a plastic tube resides in ~he inability of the surface to readily receive printing or decorative material. In addition, plastic tubes, as exemplified by polyethylene, have a memory effect; that is, they do not remain compressed when squeezed, a particular disadvantage for dentifrice tubes.
To counter the above problems, it has accordingly been proposed to provide a metallic foil barrier between the product and the polyethylene ~ube body. This would counter the compressibility problem in that the metal layer would impose its compressibility upon the plastic. In addition, the metallic foil barrier between the product and the polyethylene tube body would prevent the mentioned lS loss of essential oils and the absorption of oxygen. The metallic barrier has been suggested as an interlayer between facing sheets of polyethylene, and that a laminate be formed by heat with or without suitable adhesives. ~owever, while a structure of this general character is effective to prevent some product permeation and oxygen absorption through the tube body, and particularly when the inner thermoplastic layer is a copolymer of ethylene and a polar group containing monomer which is co-polymerizable therewith, there remains the possibility of product deterioration albeit to a much lesser extent.
PRIOR ART
Attention is directed to the following prior art.
Brandt ~V.S. Patent No~ 3,295,725) discloses a tube which combines above advantages of an aluminum tube with advantages of a plastic tube. This is a laminated collapsible dispensing container containing both a metallic barrier and a polyethylene inner wall. The thermoplastic layer is broadly described as polyolefin and a copolymer of an olefin and a polar group containing monomer which is copolymerizable therewith. This laminate overcomes the above described limitations, except for absorption of the essential oils from the dentifrices.
Marchak (Can Patent 728,525) discloses a laminated tube containing an inner layer of polyethylene. He acknowledged the problem of absorption of flavor oil by the thermoplastic wall.
_3_ 62301-1347 Cook (U.SO Patent No. 4,096,946) discloses a laminated package usiny vi~ylidene chloride as the inner layer, and an outer layer of copolymer of ethylene and propylene.
However, this is not a tube; it contains no metal; and Cook did not make mention of the flavor barrier proper~ies of the copolymer.
Anthony (U.S. Patent No. 4,207,363) discloses a laminate film used for packaging meats which contains a propylene ethylene copolymer as the outer layer. This also is not a tube; it contains no metal; and Anthony made no mention of the copolymer's flavor barrier properties.
In addition, Christensen (U.S. Patent No. 4,405,667), Ohtusuki (U.S. Patent No. 4,308,084), and Holloway IU.S.
Patent No. 4,279,344) teach laminated packaging articles containing ethylene propylene copolymer. However, none of these articles were tubes, and no mention was made of the copolymer's flavor barrier properties.
SUM~lARY OF THE INVENTION
It is, therefore, an important aim of the present invention to provide a collapsible dispensing container of laminated wall construction in the body portion.
Another aim of this invention lies in the provision of a tubular container having a plurality of adherent layers in the body portion thereof, one of said layers providing a barrier to product migration and oxygen absorption such as a metallic foil and another of said layers being ethylene propylene copolymer or mixture thereof varying in density and crystallinity. The latter layer is innermost and preferably outermost with different additional laminae sandwiched therein between.
Such additional layers comprise paper and suitable adhesive and bonding agents such as copolymer of ethylene and acrylic acid.The collapsible dispensing container of the present invention may be constructed from the laminated substrate of the present invention by conventional and known apparatuses. Exemplary of such equipment and method can be discerned from U.S. patent No. 3,832,964, A further alm of the instant invention is to provide a method of producing laminated tubes in which a tubular body is formed of a barrier layer and an ethylene propylene copolymer laminated thereto; the laminated tube bocly is then located on a forming member in adjacency to a barrier member also positioned thereon.
The invention therefore provides a substrate of layers of materials comprising a first layer of a ethylene propylene copolymer a second layer of metal foil, a third layer of paper and a fourth layer of a ethylene propylene copolymer.
- The invention further provides a collapsible paste dispensiny container of layers of materials comprisinCJ a first innermost layer of a ethylene propylene copolymer, a second layer of a metal foil, third layer of paper and an outermost fourth layer of an ethylene propylene copolymer.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings wherein like numerals are employed to designate like parts throuyhout the same:
Figure 1 is a cross-sectional view of a fragmentary portion of a laminated substrate of the present invention.
Figure 2 is a side elevational view of a collapsible dispensing container embodyiny the novel concepts of this invention, with portions of the body walls being broken away to more fully illustrate the laminated structure.
DETAILED DESCRIPTION OE THE INVENTION
The thermoplastic oi the present invention is ethylene propylene copolymer.
Referriny now first to Fiyure 1 of the drawings, a substrate 10 is shown in cross-section whereby to reveal the components of the sandwich that go to make up the laminated configuration.
It will be seen that the bottomost layer 11 is an ethylene propylene copolymer. The second layer 12 thereabove is an adhesive layer which joins the ethylene propylene copolymer layer 11 with third layer 13 which is a metal foil -1~7~
4a ~2301-1347 such as aluminum foil. The fourth layer 14 is another adhesive that adhesively secures the other surface of the metal foil layer 13 to a paper layer 15. The topmost layer 16 is ethylene propylene copolymer.
The ethylene propylene copolymer is particularly useful because it has very low flavour absorption characteristics as can be seen from the following tables where ethylene propylene copolymer is compared with polyethylene where the thicknesses of the layers or coating are the same.
~.~7;;~37 _5_ TABLE I
POLYMER ABSORPTION OF ~AI F; vGR olL
(2 week contact) Polymer Weight Increase (%) Aluminum 0 Ethylene propylene copolymer Rigidex~40 ~British Petroleum) 4.8 Low density polyethylene Tenite 154 (Eastman~ 5.5 Low density polethylene Lupolen*1804H (BASF) 5.6~0.14 High density polyethylene LR*(USI) 5.9 Ionomer Surlyn*1707 lDupont) 15.7 Ionomer Surlyn 1605 (Dupont~ 19.0 Ionomer Surlyn 1706 (Dupont) 24.3 TABLE II
Relative Flavor Absorption by Polymers After Contact with Dentifxice for 3 Months*
Polymer Flavor Absorbed~
Ethylene propylene copolymer Rigidex 40 (British Petroleum) 59 High density polyethylene LR(USI) 84 Low density polyethylene N~k(USI) 100+13 Ionomer Surlyn 1706 893 Ionomer Surlyn 1707 1557 Ionomer Surlyn 1605 1672 * At 90F
** Relative to low density polyethylene which was arbitrarily set at 100; the lower the number the less ~lavor absorbed.
*Trade-mark '7;~3~
It is contemplated that within the purview of the invention the adhesives may be a copolymer of ethylene and acrylic acid or methacrylic acid, or sodium or zinc salts thereof in a diluent system.
The metal foil may be preferably aluminum foil.
The paper layer is desirably a kraft paper.
The thickness range of each of the layers is as follows:
Ethylene propylene copolymer layer 11 0.5 mils to 3.0 mils, preferably 1.0 mils Adhesive layer 12 - sufficient to assure adherence Metal foil layer 13 - 0.5 mils to 2.0 mils, preferably 1.0 mils.
Adhesive layer 14 - sufficient to assure adherence Paper layer 15 - 1.5 mils to 2.5 mils, preferably 2.0 mils.
Ethylene propylene copolymer layer 16 - 3.5 mils to 5.0 mils, preferably 4.0 mils.
The topmost ethylene propylene copolymer layer 16 adheres to the paper layer 15 by means of the application of sufficient heat and pressure to the substrate. In the event the application of heat and pressure is not appropriate a suitable adhesive is to be employed.
Figure 2 is an example of the laminated structure of a collapsible container with the layers being demonstrated as in Figure l with layer 11 being inner most and the other layer being of the same materials and in the same order as shown.
It is believed manifest from the foregoing that applicant has provided a collapsible container structure which substantially reduces the problems heretofore unsolved by the prior art. The laminated substrate and laminated shoulder piece 20 substantially eliminates product permeation and oxygen absorption.
The outer layer of an ethylene propylene copolymer is a thermoplastic capable of fusion during a side seaming step and granting adequate protection to the paper and metallic foil interlayer. The art of seaming of a collapsible dentifrice tube of the general type herein disclosed can be seen in U.S. Patent No. 3,295,725, However, the outer layer of ethylene propylene copolymer and paper may be ellminated if the foil barrier is of sufficient thickness to resist damage, and by flowing a thermoplastic material into the overlap side seam during the sealing thereof when such a system is employed.
Further, the outer layer may be paper in a three-ply laminate formed of paper, foil and an ethylene polypropylene copolymer as described. As the outermost and innermost layers are preferably the same, the folded edges of the tube ! produced from the substrate is conveniently heat bonded. A suitable adhesive can be used when heat bonding is not possible. This modification is in addition to the aforementioned four-ply laminate comprised of from outside to in, eth~lene propylene copolymer, paper, foil and ethylene propylene copolymer. It is contemplated that suitable adhesives will be employed between the laminae whenever necessary.
Ethylene propylene copolymers can also be employed for the shoulder piece, cap, neck, piston and in the construction of dispensing valves for other dentifrice dispensers, particularly in conjunction with the interior portions exposed to the contained dentifrice, and, again, where required, compatible adhesives would naturally be employed.
Additionally when cast as a film on the interior surfaces of fiber drums used for the storage of flavored dentifrice, the material will retard flavor loss into the drums, thereb~ extending storage life.
Various modifications of the invention have been disclosed herein, and these and other changes can of course be effected without departing from the novel concepts of the instant contribution.
To counter the above problems, it has accordingly been proposed to provide a metallic foil barrier between the product and the polyethylene ~ube body. This would counter the compressibility problem in that the metal layer would impose its compressibility upon the plastic. In addition, the metallic foil barrier between the product and the polyethylene tube body would prevent the mentioned lS loss of essential oils and the absorption of oxygen. The metallic barrier has been suggested as an interlayer between facing sheets of polyethylene, and that a laminate be formed by heat with or without suitable adhesives. ~owever, while a structure of this general character is effective to prevent some product permeation and oxygen absorption through the tube body, and particularly when the inner thermoplastic layer is a copolymer of ethylene and a polar group containing monomer which is co-polymerizable therewith, there remains the possibility of product deterioration albeit to a much lesser extent.
PRIOR ART
Attention is directed to the following prior art.
Brandt ~V.S. Patent No~ 3,295,725) discloses a tube which combines above advantages of an aluminum tube with advantages of a plastic tube. This is a laminated collapsible dispensing container containing both a metallic barrier and a polyethylene inner wall. The thermoplastic layer is broadly described as polyolefin and a copolymer of an olefin and a polar group containing monomer which is copolymerizable therewith. This laminate overcomes the above described limitations, except for absorption of the essential oils from the dentifrices.
Marchak (Can Patent 728,525) discloses a laminated tube containing an inner layer of polyethylene. He acknowledged the problem of absorption of flavor oil by the thermoplastic wall.
_3_ 62301-1347 Cook (U.SO Patent No. 4,096,946) discloses a laminated package usiny vi~ylidene chloride as the inner layer, and an outer layer of copolymer of ethylene and propylene.
However, this is not a tube; it contains no metal; and Cook did not make mention of the flavor barrier proper~ies of the copolymer.
Anthony (U.S. Patent No. 4,207,363) discloses a laminate film used for packaging meats which contains a propylene ethylene copolymer as the outer layer. This also is not a tube; it contains no metal; and Anthony made no mention of the copolymer's flavor barrier properties.
In addition, Christensen (U.S. Patent No. 4,405,667), Ohtusuki (U.S. Patent No. 4,308,084), and Holloway IU.S.
Patent No. 4,279,344) teach laminated packaging articles containing ethylene propylene copolymer. However, none of these articles were tubes, and no mention was made of the copolymer's flavor barrier properties.
SUM~lARY OF THE INVENTION
It is, therefore, an important aim of the present invention to provide a collapsible dispensing container of laminated wall construction in the body portion.
Another aim of this invention lies in the provision of a tubular container having a plurality of adherent layers in the body portion thereof, one of said layers providing a barrier to product migration and oxygen absorption such as a metallic foil and another of said layers being ethylene propylene copolymer or mixture thereof varying in density and crystallinity. The latter layer is innermost and preferably outermost with different additional laminae sandwiched therein between.
Such additional layers comprise paper and suitable adhesive and bonding agents such as copolymer of ethylene and acrylic acid.The collapsible dispensing container of the present invention may be constructed from the laminated substrate of the present invention by conventional and known apparatuses. Exemplary of such equipment and method can be discerned from U.S. patent No. 3,832,964, A further alm of the instant invention is to provide a method of producing laminated tubes in which a tubular body is formed of a barrier layer and an ethylene propylene copolymer laminated thereto; the laminated tube bocly is then located on a forming member in adjacency to a barrier member also positioned thereon.
The invention therefore provides a substrate of layers of materials comprising a first layer of a ethylene propylene copolymer a second layer of metal foil, a third layer of paper and a fourth layer of a ethylene propylene copolymer.
- The invention further provides a collapsible paste dispensiny container of layers of materials comprisinCJ a first innermost layer of a ethylene propylene copolymer, a second layer of a metal foil, third layer of paper and an outermost fourth layer of an ethylene propylene copolymer.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings wherein like numerals are employed to designate like parts throuyhout the same:
Figure 1 is a cross-sectional view of a fragmentary portion of a laminated substrate of the present invention.
Figure 2 is a side elevational view of a collapsible dispensing container embodyiny the novel concepts of this invention, with portions of the body walls being broken away to more fully illustrate the laminated structure.
DETAILED DESCRIPTION OE THE INVENTION
The thermoplastic oi the present invention is ethylene propylene copolymer.
Referriny now first to Fiyure 1 of the drawings, a substrate 10 is shown in cross-section whereby to reveal the components of the sandwich that go to make up the laminated configuration.
It will be seen that the bottomost layer 11 is an ethylene propylene copolymer. The second layer 12 thereabove is an adhesive layer which joins the ethylene propylene copolymer layer 11 with third layer 13 which is a metal foil -1~7~
4a ~2301-1347 such as aluminum foil. The fourth layer 14 is another adhesive that adhesively secures the other surface of the metal foil layer 13 to a paper layer 15. The topmost layer 16 is ethylene propylene copolymer.
The ethylene propylene copolymer is particularly useful because it has very low flavour absorption characteristics as can be seen from the following tables where ethylene propylene copolymer is compared with polyethylene where the thicknesses of the layers or coating are the same.
~.~7;;~37 _5_ TABLE I
POLYMER ABSORPTION OF ~AI F; vGR olL
(2 week contact) Polymer Weight Increase (%) Aluminum 0 Ethylene propylene copolymer Rigidex~40 ~British Petroleum) 4.8 Low density polyethylene Tenite 154 (Eastman~ 5.5 Low density polethylene Lupolen*1804H (BASF) 5.6~0.14 High density polyethylene LR*(USI) 5.9 Ionomer Surlyn*1707 lDupont) 15.7 Ionomer Surlyn 1605 (Dupont~ 19.0 Ionomer Surlyn 1706 (Dupont) 24.3 TABLE II
Relative Flavor Absorption by Polymers After Contact with Dentifxice for 3 Months*
Polymer Flavor Absorbed~
Ethylene propylene copolymer Rigidex 40 (British Petroleum) 59 High density polyethylene LR(USI) 84 Low density polyethylene N~k(USI) 100+13 Ionomer Surlyn 1706 893 Ionomer Surlyn 1707 1557 Ionomer Surlyn 1605 1672 * At 90F
** Relative to low density polyethylene which was arbitrarily set at 100; the lower the number the less ~lavor absorbed.
*Trade-mark '7;~3~
It is contemplated that within the purview of the invention the adhesives may be a copolymer of ethylene and acrylic acid or methacrylic acid, or sodium or zinc salts thereof in a diluent system.
The metal foil may be preferably aluminum foil.
The paper layer is desirably a kraft paper.
The thickness range of each of the layers is as follows:
Ethylene propylene copolymer layer 11 0.5 mils to 3.0 mils, preferably 1.0 mils Adhesive layer 12 - sufficient to assure adherence Metal foil layer 13 - 0.5 mils to 2.0 mils, preferably 1.0 mils.
Adhesive layer 14 - sufficient to assure adherence Paper layer 15 - 1.5 mils to 2.5 mils, preferably 2.0 mils.
Ethylene propylene copolymer layer 16 - 3.5 mils to 5.0 mils, preferably 4.0 mils.
The topmost ethylene propylene copolymer layer 16 adheres to the paper layer 15 by means of the application of sufficient heat and pressure to the substrate. In the event the application of heat and pressure is not appropriate a suitable adhesive is to be employed.
Figure 2 is an example of the laminated structure of a collapsible container with the layers being demonstrated as in Figure l with layer 11 being inner most and the other layer being of the same materials and in the same order as shown.
It is believed manifest from the foregoing that applicant has provided a collapsible container structure which substantially reduces the problems heretofore unsolved by the prior art. The laminated substrate and laminated shoulder piece 20 substantially eliminates product permeation and oxygen absorption.
The outer layer of an ethylene propylene copolymer is a thermoplastic capable of fusion during a side seaming step and granting adequate protection to the paper and metallic foil interlayer. The art of seaming of a collapsible dentifrice tube of the general type herein disclosed can be seen in U.S. Patent No. 3,295,725, However, the outer layer of ethylene propylene copolymer and paper may be ellminated if the foil barrier is of sufficient thickness to resist damage, and by flowing a thermoplastic material into the overlap side seam during the sealing thereof when such a system is employed.
Further, the outer layer may be paper in a three-ply laminate formed of paper, foil and an ethylene polypropylene copolymer as described. As the outermost and innermost layers are preferably the same, the folded edges of the tube ! produced from the substrate is conveniently heat bonded. A suitable adhesive can be used when heat bonding is not possible. This modification is in addition to the aforementioned four-ply laminate comprised of from outside to in, eth~lene propylene copolymer, paper, foil and ethylene propylene copolymer. It is contemplated that suitable adhesives will be employed between the laminae whenever necessary.
Ethylene propylene copolymers can also be employed for the shoulder piece, cap, neck, piston and in the construction of dispensing valves for other dentifrice dispensers, particularly in conjunction with the interior portions exposed to the contained dentifrice, and, again, where required, compatible adhesives would naturally be employed.
Additionally when cast as a film on the interior surfaces of fiber drums used for the storage of flavored dentifrice, the material will retard flavor loss into the drums, thereb~ extending storage life.
Various modifications of the invention have been disclosed herein, and these and other changes can of course be effected without departing from the novel concepts of the instant contribution.
Claims (10)
1. A substrate of layers of materials comprising a first layer of a ethylene propylene copolymer a second layer of metal foil, a third layer of paper and a fourth layer of a ethylene propylene copolymer.
2. The substrate of claim 1 wherein the first layer of the ethylene propylene copolymer is secured to the metal foil with an adhesive.
3. The substrate of claim 1 wherein the third layer of paper is secured to the fourth layer of the ethylene propylene copolymer with an adhesive.
4. The substrate of claim 1 wherein the first layer of the ethylene propylene copolymer is secured to the metal foil with an adhesive and wherein the third layer of paper is secured to the fourth layer of the ethylene propylene copolymer with an adhesive.
5. The substrate of claim 4 wherein the adhesive is a copolymer of ethylene and acrylic acid.
6. A collapsible paste dispensing container of layers of materials comprising a first innermost layer of a ethylene propylene copolymer, a second layer of metal foil, a third layer of paper and an outermost fourth layer of a ethylene propylene copolymer.
7. The container of claim 6 wherein the first layer of the ethylene propylene copolymer is secured to the metal foil with an adhesive.
8. The container of claim 6 wherein the third layer of paper is secured to the fourth layer of the ethylene propylene copolymer with an adhesive.
9. The container of claim 6 wherein the first layer of the ethylene propylene copolymer is secured to the metal foil with an adhesive and wherein the third layer of paper is secured to the fourth layer of the ethylene propylene copolymer with an adhesive.
10. The container of claim 9 wherein the adhesive is a copolymer of ethylene and acrylic acid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68728184A | 1984-12-28 | 1984-12-28 | |
| US687,281 | 1984-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1272437A true CA1272437A (en) | 1990-08-07 |
Family
ID=24759813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000498577A Expired - Lifetime CA1272437A (en) | 1984-12-28 | 1985-12-24 | Collapsible container made from ethylene propylene copolymer |
Country Status (26)
| Country | Link |
|---|---|
| JP (1) | JPS61158442A (en) |
| AT (1) | AT395559B (en) |
| AU (1) | AU583329B2 (en) |
| BE (1) | BE903960A (en) |
| BR (1) | BR8506516A (en) |
| CA (1) | CA1272437A (en) |
| CH (1) | CH669562A5 (en) |
| DE (1) | DE3544029A1 (en) |
| DK (1) | DK598885A (en) |
| ES (1) | ES8701045A1 (en) |
| FI (1) | FI85242C (en) |
| FR (1) | FR2575409B1 (en) |
| GB (2) | GB2168926B (en) |
| GR (1) | GR853105B (en) |
| IN (1) | IN164709B (en) |
| IT (1) | IT1182105B (en) |
| LU (1) | LU86231A1 (en) |
| MY (1) | MY101671A (en) |
| NL (1) | NL8503549A (en) |
| NO (1) | NO170522C (en) |
| NZ (1) | NZ214515A (en) |
| PH (1) | PH23516A (en) |
| PT (1) | PT81717B (en) |
| SE (1) | SE466393B (en) |
| ZA (1) | ZA859498B (en) |
| ZM (1) | ZM10185A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6113885A (en) * | 1998-12-18 | 2000-09-05 | Colgate Palmolive Company | Polyolefin packaged dentifrice having reduced flavor loss |
| CN115335296A (en) * | 2020-03-10 | 2022-11-11 | 凸版印刷株式会社 | Tubular container |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3505143A (en) * | 1966-03-10 | 1970-04-07 | American Can Co | Method of laminating sheet material by coating metal foil with a copolymer of ethylene and an ethylenically unsaturated carboxylic acid |
| JPS5034472A (en) * | 1973-07-30 | 1975-04-02 | ||
| JPS5422770U (en) * | 1977-07-19 | 1979-02-14 | ||
| JPS5725949A (en) * | 1980-07-22 | 1982-02-10 | Toyo Ink Mfg Co | Manufacture of laminate |
| JPS5733223A (en) * | 1980-08-08 | 1982-02-23 | Toshiba Corp | Bearing bracket made of steel plate |
| US4418841A (en) * | 1982-11-23 | 1983-12-06 | American Can Company | Multiple layer flexible sheet structure |
| US4951841A (en) * | 1984-12-28 | 1990-08-28 | Colgate-Palmolive Company | Dispensing container made from an ethylene vinyl alcohol containing laminated material and the material therefor |
| IN165840B (en) * | 1984-12-28 | 1990-01-20 | Colgate Palmolive Co | |
| IN164974B (en) * | 1984-12-28 | 1989-07-15 | Colgate Palmolive Co |
-
1985
- 1985-12-09 IN IN1037/DEL/85A patent/IN164709B/en unknown
- 1985-12-10 NZ NZ214515A patent/NZ214515A/en unknown
- 1985-12-11 ZA ZA859498A patent/ZA859498B/en unknown
- 1985-12-12 AU AU51148/85A patent/AU583329B2/en not_active Ceased
- 1985-12-13 DE DE19853544029 patent/DE3544029A1/en not_active Withdrawn
- 1985-12-16 PH PH33177A patent/PH23516A/en unknown
- 1985-12-16 FI FI854986A patent/FI85242C/en not_active IP Right Cessation
- 1985-12-18 AT AT0365985A patent/AT395559B/en not_active IP Right Cessation
- 1985-12-19 PT PT81717A patent/PT81717B/en not_active IP Right Cessation
- 1985-12-20 FR FR8518994A patent/FR2575409B1/en not_active Expired
- 1985-12-20 GB GB8531359A patent/GB2168926B/en not_active Expired
- 1985-12-20 SE SE8506041A patent/SE466393B/en not_active IP Right Cessation
- 1985-12-20 DK DK598885A patent/DK598885A/en not_active Application Discontinuation
- 1985-12-20 GR GR853105A patent/GR853105B/el unknown
- 1985-12-20 IT IT48971/85A patent/IT1182105B/en active
- 1985-12-23 NL NL8503549A patent/NL8503549A/en not_active Application Discontinuation
- 1985-12-24 CA CA000498577A patent/CA1272437A/en not_active Expired - Lifetime
- 1985-12-24 CH CH5538/85A patent/CH669562A5/de not_active IP Right Cessation
- 1985-12-26 BR BR8506516A patent/BR8506516A/en unknown
- 1985-12-27 ZM ZM101/85A patent/ZM10185A1/en unknown
- 1985-12-27 ES ES550472A patent/ES8701045A1/en not_active Expired
- 1985-12-27 JP JP60299744A patent/JPS61158442A/en active Granted
- 1985-12-27 NO NO855319A patent/NO170522C/en unknown
- 1985-12-30 LU LU86231A patent/LU86231A1/en unknown
- 1985-12-30 BE BE0/216078A patent/BE903960A/en not_active IP Right Cessation
-
1987
- 1987-09-30 MY MYPI87002436A patent/MY101671A/en unknown
-
1988
- 1988-07-05 GB GB8815959A patent/GB2206531B/en not_active Expired
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