WO2000043282A1 - Emballage stratifie et procede de fabrication - Google Patents

Emballage stratifie et procede de fabrication Download PDF

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Publication number
WO2000043282A1
WO2000043282A1 PCT/US1999/001546 US9901546W WO0043282A1 WO 2000043282 A1 WO2000043282 A1 WO 2000043282A1 US 9901546 W US9901546 W US 9901546W WO 0043282 A1 WO0043282 A1 WO 0043282A1
Authority
WO
WIPO (PCT)
Prior art keywords
base layer
layer
package
paper
carton
Prior art date
Application number
PCT/US1999/001546
Other languages
English (en)
Inventor
Roger P. Hoffmann
Original Assignee
Hoffman Environmental Systems, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoffman Environmental Systems, Inc. filed Critical Hoffman Environmental Systems, Inc.
Priority to AU22415/99A priority Critical patent/AU2241599A/en
Priority to PCT/US1999/001546 priority patent/WO2000043282A1/fr
Publication of WO2000043282A1 publication Critical patent/WO2000043282A1/fr

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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • B32B29/00—Layered products comprising a layer 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
    • B65D5/563—Laminated linings; Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/50—Construction of rigid or semi-rigid containers covered or externally reinforced
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/414—Translucent
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • 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
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/20—Starch
    • 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
    • B32B2439/70—Food packaging
    • 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
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives

Definitions

  • paperboard is generally considered to include container board, such as corrugated medium and linerboard, as well as boxboard, also commonly referred to as solid fiber board, which includes beverage carriers, cereal boxes, milk cartons, small folded cartons, and the like. It has been recognized that sharp, precise graphics cannot be obtained when printing directly on paperboard products, due to the fact that the paperboard printing surface is relatively rough or uneven, as compared with clay coated paper. Further, paperboard normally has a gray or brown color, and printing directly on the darker color of the paperboard will tend to distract from the resolution of the graphics. To meet the demand for improved graphics, there have been attempts to use white packaging substrates produced from bleached pulp.
  • the white substrates provide enhanced printing surfaces, as compared with the normal brown and gray paperboard, the white paperboard is considerably more costly to produce and lacks the strength of an unbleached pulp substrate. Further, paperboard is relatively thick as compared to publication paper and cannot be printed through use of the modern high speed printing processes that are used for paper printing.
  • Beverage carrier which is a type of paperboard product, is designed to contain beverage cans in six-packs, twelve-packs, cases, or the like. As the beverage cans have considerable weight, it is important that the beverage carrier have high tear strength.
  • the typical beverage carrier is a two-ply product, generally consisting of a base ply of virgin Kraft formed from long soft wood fibers, which provide the increased tear strength, and an outer or top ply, generally formed of shorter fiber hardwood.
  • the top ply typically receives a clay coating and graphics are then printed on the clay coated top ply.
  • the printed sheet is then die-cut into sections and each section is folded and glued into the shape of a carton or container to subsequently receive the beverage cans.
  • the printed graphics do not have the fine or sharp resolution compared to graphics printed on paper. Further, it is difficult to produce the clay coated paperboard. Because of the dark color of the substrate, the clay coating must be thick enough to mask the color, but if the clay coating is too thick, it may crack and adversely effect the printed graphics.
  • a further problem in the production of beverage carrier is that the printing cannot be done on high speed web offset presses as with paper, so that less sophisticated, lower speed printing equipment must be employed.
  • the invention is directed to a laminated solid fiberboard product having enhanced graphics and to a method of producing the same.
  • a sheet of paper is printed with graphics, preferably by a high speed web offset printer.
  • the printed sheet is then wound in coil form and stored for subsequent application to a cellulosic substrate.
  • the paper can be any of a variety of papers, such as clay coated or super calendered publication paper, lightweight coated label stock paper or lightweight machine glazed paper.
  • the cellulosic substrate may consist of a single containerboard or box- board or multiple containerboard or boxboard that are laminated together.
  • the overall laminated product's rigidity may be increased and its tendency to curl may be reduced through the use of two boards laminated together to create the cellulosic substrate.
  • the cellulosic substrate can consist of one or more plies of unbleached virgin Kraft pulp, or alternately the substrate can consist of one or more plies of recycled pulp having a layer of water absorbent cellulosic material applied to a face of the recycled pulp ply through a tear resistant and moisture resistant adhesive, or a layer or film of moisture resistant material, such as polypropylene film, can be applied to a face of the recycled cellulosic substrate.
  • the printed paper would be applied to the face of the cellulosic substrate opposite the face to which the moisture absorbent material, or film, or layer of moisture barrier material is applied, using a tear resistant or moisture resistant adhesive.
  • the cellulosic substrate can also be formed of one or more plies of recycled fibers, which depending on the requirements of the product, may or may not require the use of tear resistant and moisture resistant adhesive.
  • the coiled printed paper is unwound and continuously applied to a surface of the moving cellulosic substrate and bonded to the substrate by an adhesive, to thereby provide a laminated product.
  • the paper sheet is relatively thin, having a basis weight up to 100 pounds per 3,000 sq. feet and preferably in the range of 18 to 40 pounds per 3,000 sq. feet, and as the thin layer of adhesive can be relatively translucent, the dark colored cellulosic substrate may show through the printed paper, thus detracting from the appearance of the graphics.
  • finely divided particles of a generally inert white pigment, such as calcium carbonate or titanium dioxide can be incorporated in the adhesive, or alternately, a second clay coat can be applied to the undersurface of the paper prior to bonding the paper to the substrate.
  • a mottled white substrate which is a substrate having a ply of bleached or white fibers on one side facing the paper, can be employed. If the cellulosic substrate is comprised of multiple boards, the boards can either be comprised of a single mottled white board laminated to a non-mottled white board or two mottled white boards laminated together with the white interior layers facing outward to create a finished product that would have a mottled-white interior.
  • the laminated product is then die cut into a plurality of sections or segments of desired shape and each section is then folded and glued to form the configuration of a carton.
  • the cartons, in flat folded shape, are shipped to the manufacturer of the product, the cartons are then opened, the product inserted and the end flaps are then glued or secured to provide the final packaged product for distribution.
  • the beverage cans may be introduced into the laminated carton in a refrigerated state. Subsequently moisture may condense on the refrigerated cans, which can cause warping or disfiguration of the laminated carton.
  • a layer of moisture absorbent, cellulosic material such as Kraft paper, corrugated medium, or newsprint can be applied to the inner surface of the cellulosic substrate prior to cutting and folding of the laminated sheet.
  • the water absorbent cellulosic layer is applied to the inner surface of the substrate through use of a moisture resistant adhesive.
  • the moisture absorbent layer will absorb any moisture which may condense on the cans contained within the package to prevent warping of the laminated package.
  • the invention provides enhanced graphics for paperboard packaging by use of high speed printing on publication paper, which is then bonded to the cellulosic substrate through an adhesive.
  • the invention is directed in general to a laminated printed package consisting of a non-corrugated cellulosic substrate having a sheet of paper containing graphics applied to the outer surface of the substrate through use of an adhesive.
  • the paper sheet to be used in the invention is relatively thin, having a basis weight less than 100 pounds per 3,000 sq. feet, and preferably from, 18 to 40 pounds per 3,000 sq. feet.
  • a variety of papers can be employed, such as clay coated or super calendered publication papers, lightweight coated label stock paper or lightweight machine glazed paper.
  • the type of paper used is generally determined by the particular graphic objective, which can be printing embossing, metalizing or foil stamping.
  • the paper in coiled form is unwound and graphics are applied by conventional techniques, such as by high speed, offset printing, operating at a speed generally in the range of 1500 to 3200 ft. per minute. Alternately, high speed rotogravure printing can be utilized to print the graphics on the clay-coated or smooth surface of the paper.
  • the cellulosic substrate can be produced by conventional procedures and can consist of unbleached virgin Kraft pulp, recycled pulp produced from old corrugated containers, newsprint, white office waste, and the like, or mixtures or virgin pulp and recycled pulp.
  • the substrate is produced in one or more plies and generally has a basis weight of 23 lbs. to 90 lbs. per 1 ,000 sq. ft.
  • the cellulosic substrate may consist of a single containerboard or solid fiberboard or multiple containerboards or boxboard or a combination of containerboard and boxboard that are laminated together.
  • the overall laminated product's rigidity may be increased and its tendency to curl may be reduced through the use of two boards laminated together to create the cellulosic substrate.
  • long fiber, virgin soft wood pulp is preferred as the base layer of the substrate, and an outer or top ply of finer fiber hardwood pulp can be applied to the base ply.
  • one or more plies of recycled fibers can be used in forming the substrate along with a layer of water absorbent cellulosic material which is bonded to a face of the recycled ply, opposite to the face to which the paper is to be subsequently applied, by a moisture resistant and tear resistant adhesive, thus protecting the recycled pulp ply from moisture and odor and meeting the tear resistant requirements for the beverage carrier.
  • the water absorbent cellulosic material can take the form of Kraft paper, corrugated medium, newsprint or linerboard.
  • a layer or film of moisture resistant material such as polyethylene film, can be applied to the inner face of the cellulosic substrate.
  • the substrate When producing a laminated product that is designed to contain products of lesser weight, such as cereal boxes, milk cartons, or the like, the substrate can be formed of one or more plies of recycled pulp, produced from old corrugated cartons, newsprint, office waste, and the like.
  • the cellulosic substrate when producing a high strength product such as beverage carrier, can be produced by a typical Kraft process, in which wood chips are cooked at a temperature of approximately 340°f with the addition of sodium hydroxide and sodium hydrosulfide (conventional Kraft white liquor) for a period of about 20 to 60 minutes to dissolve the lignin and hemi-cellulose. After cooking, the pulp is washed which acts to remove up to 98% of the treating chemicals. The pulp is then diluted with water to a solids content of about 4% and treated with sulfuric acid and alum to obtain the desired pH. The pulp stock is then delivered to the headbox of the forming section of the papermaking machine, and the pulp slurry is fed from the headbox onto the forming fabric to provide a pulp mat.
  • a typical Kraft process in which wood chips are cooked at a temperature of approximately 340°f with the addition of sodium hydroxide and sodium hydrosulfide (conventional Kraft white liquor) for a period of about 20 to 60 minutes to dissolve the lig
  • Water is removed from the pulp mat by both gravity and mechanical induced vacuum, and the partially dewatered pulp then passes through the press section and drying section of the papermaking machine, in a conventional manner, to produce the dry cellulosic substrate.
  • the pulp for each additional ply is fed from a second headbox located downstream of the first headbox onto the base ply to provide the composite structure in a conventional manner.
  • the cellulosic substrate When producing non-beverage carrier folding carton, such as cereal box, the cellulosic substrate will generally consist of multiple plies of recycled fibers.
  • the pulping of the recycled fibers is carried out in a conventional manner, in which the recycled cellulosic waste is mixed with water and chemical dispersants, such as sodium hydroxide. The mixture is then subjected to a shear type of pulping agitation to break down the cellulosic waste into individual fibers and to liberate inks and toners.
  • the dispersant chemicals act to dissociate the ink from the fibers, and disperse the ink particles in the aqueous pulp slurry.
  • the pulp can then be subjected to conventional ink removal operations, which can be accomplished either by froth floatation or dilution washing.
  • the cellulosic substrate When utilizing virgin unbleached Kraft pulp, the cellulosic substrate will be brown in color, while the substrate formed from recycled materials will generally be a gray color.
  • the printed paper is uncoiled, and continuously bonded to the moving sheet of the cellulosic substrate through use of an adhesive.
  • the adhesive to be used can be an amphoteric waxy maze-type starch, such as sold under the designation CAT0225 by National Starch Company.
  • the starch is hydrolyzed or cooked, preferably by a conventional steam injector which heat and hydrolyses the starch.
  • the adhesive can take the form of a water resistant resin, such as an epoxy resin or a urea formaldehyde resin, or a hot melt adhesive.
  • the substrate is generally heated to a temperature in the range of 150°F to 200°F and the adhesive is preferably applied to the undersurface of the paper by a gate roll size press, or a metering blade.
  • the paper with the adhesive on its undersurface is then applied to the upper surface of the cellulosic substrate to provide a laminated product which is passed through compression rolls to firmly bond the printed paper to the substrate.
  • the moisture absorbent cellulosic material or the moisture resistant film can be applied to the opposite face of the cellulosic substrate from the printed paper in a single operation as an additional lamination station on the laminator that is applying the printed paper to the substrate.
  • the cellulosic substrate is comprised of multiple containerboard or boxboards or a combination of both types of board, as discussed above, the boards can be laminated together with an additional lamination station on the same laminator.
  • starch as the adhesive has advantages. Initially, from an ecological standpoint in that there are no hazardous emissions when using starch, as can occur when using a solvent-base adhesive.
  • the starch being impregnated into the outer face of the cellulose substrate, will increase the dry strength of the substrate.
  • the printed paper extends over the entire surface area of the substrate.
  • the laminated product is then die cut into a plurality of sections or segments of the desired shape or configuration. Each section is then folded and glued to form an open-ended carton-like structure, and the flat cartons are then shipped to the manufacturer of the product to be contained. At the site of the product manufacturer, the flat cartons are opened, the product inserted, and the end flaps are then glued to provide the final packaged product that can be sent for distribution.
  • the items, such as beverage cans, inserted into the laminated package or carton may be cold or refrigerated, and in this case, moisture may condense on the cans. It has been found that the condensed moisture may tend to warp or disfigure the laminated package.
  • a layer of water absorbent Kraft paper, corrugated medium or newsprint can be applied to the inner surface of the cellulose substrate or base layer, through use of a moisture resistant adhesive which can take the form of an epoxy resin, urea formaldehyde resin, or the like.
  • any moisture condensing on the refrigerated cans will be absorbed in the inner layer of cellulosic material and will not migrate through the laminated package due to the barrier created by the moisture resistant adhesive, thus eliminating warping or other disfigurement of the package or carton.
  • a layer or film of moisture resistant material such as polyethylene film, can be applied to the inner face of the cellulosic substrate prior to cutting and folding of the laminated material.
  • the moisture resistant film will prevent migration of water or moisture through the laminated package to aid in minimizing any warpage or disfigurement of the package.
  • the paper sheet is very thin and tends to be translucent.
  • the layer of adhesive is translucent, with the result that there may be "show-through” of the dark colored cellulosic substrate which could detract from the appearance of the printed graphics.
  • finely divided particles of a generally inert pigment such as calcium carbonate, titanium dioxide, or the like, can be incorporated with the starch.
  • "show-through” can be prevented by applying a second coating of clay to the undersurface of the paper, the undersurface being the surface of the paper adjacent the cellulosic substrate.
  • a further alternative is to use a mottled white substrate in which a ply of bleached or white fibers is located on the face of the substrate to which the paper is subsequently bonded.
  • the invention combines the strength of the publishing business with the need for enhanced graphics in packaging, by laminating printed rolls of paper to a heavier weight cellulosic substrate, immediately preceding the die cutting, folding and gluing process.

Abstract

D'après cette invention, des images graphiques sont tout d'abord appliquées sur une fine feuille de papier. La feuille de papier comportant ces images graphiques est ensuite collée à l'aide d'un adhésif sur une couche de base sèche et en mouvement continu qui se compose de fibres de cellulose, ceci de manière à former une structure stratifiée. La structure stratifiée est ensuite découpée en segments qui sont chacun mis en forme de carton. Plusieurs conteneurs de boissons sont alors introduits dans l'extrémité ouverte du carton, ce dernier étant enfin scellé de manière à obtenir un système de transport de boissons final.
PCT/US1999/001546 1999-01-25 1999-01-25 Emballage stratifie et procede de fabrication WO2000043282A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU22415/99A AU2241599A (en) 1999-01-25 1999-01-25 Laminated package and method of producing the same
PCT/US1999/001546 WO2000043282A1 (fr) 1999-01-25 1999-01-25 Emballage stratifie et procede de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/001546 WO2000043282A1 (fr) 1999-01-25 1999-01-25 Emballage stratifie et procede de fabrication

Publications (1)

Publication Number Publication Date
WO2000043282A1 true WO2000043282A1 (fr) 2000-07-27

Family

ID=22272049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/001546 WO2000043282A1 (fr) 1999-01-25 1999-01-25 Emballage stratifie et procede de fabrication

Country Status (2)

Country Link
AU (1) AU2241599A (fr)
WO (1) WO2000043282A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1504894A1 (fr) * 2002-05-16 2005-02-09 Tetra Laval Holdings & Finance S.A. Procede de production d'un materiau d'emballage en papier opaque, materiau d'emballage en papier opaque, materiau d'emballage en semi-papier et boite d'emballage en papier opaque

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804656A (en) * 1972-02-22 1974-04-16 Engelhard Min & Chem Pigment dispersions and use thereof
US4237206A (en) * 1977-12-21 1980-12-02 Fuji Photo Film Co., Ltd. Photographic paper base with seperate reflective layer
US4898752A (en) * 1988-03-30 1990-02-06 Westvaco Corporation Method for making coated and printed packaging material on a printing press
US5011741A (en) * 1990-03-20 1991-04-30 Green Bay Packaging, Inc. Linerboard containing recycled newsprint
US5038997A (en) * 1990-02-26 1991-08-13 Brown & Williamson Tobacco Corporation Water resistant paperboard and method of making same
US5458723A (en) * 1991-11-12 1995-10-17 The Mead Corporation Method of forming a strengthened bond in a paperboard product and products therefrom

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804656A (en) * 1972-02-22 1974-04-16 Engelhard Min & Chem Pigment dispersions and use thereof
US4237206A (en) * 1977-12-21 1980-12-02 Fuji Photo Film Co., Ltd. Photographic paper base with seperate reflective layer
US4898752A (en) * 1988-03-30 1990-02-06 Westvaco Corporation Method for making coated and printed packaging material on a printing press
US5038997A (en) * 1990-02-26 1991-08-13 Brown & Williamson Tobacco Corporation Water resistant paperboard and method of making same
US5011741A (en) * 1990-03-20 1991-04-30 Green Bay Packaging, Inc. Linerboard containing recycled newsprint
US5458723A (en) * 1991-11-12 1995-10-17 The Mead Corporation Method of forming a strengthened bond in a paperboard product and products therefrom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1504894A1 (fr) * 2002-05-16 2005-02-09 Tetra Laval Holdings & Finance S.A. Procede de production d'un materiau d'emballage en papier opaque, materiau d'emballage en papier opaque, materiau d'emballage en semi-papier et boite d'emballage en papier opaque
EP1504894A4 (fr) * 2002-05-16 2009-07-08 Tetra Laval Holdings & Finance Procede de production d'un materiau d'emballage en papier opaque, materiau d'emballage en papier opaque, materiau d'emballage en semi-papier et boite d'emballage en papier opaque

Also Published As

Publication number Publication date
AU2241599A (en) 2000-08-07

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