EP1278604A1 - Process for coating paperboard with a water-dispersible polyester polymer - Google Patents
Process for coating paperboard with a water-dispersible polyester polymerInfo
- Publication number
- EP1278604A1 EP1278604A1 EP00926398A EP00926398A EP1278604A1 EP 1278604 A1 EP1278604 A1 EP 1278604A1 EP 00926398 A EP00926398 A EP 00926398A EP 00926398 A EP00926398 A EP 00926398A EP 1278604 A1 EP1278604 A1 EP 1278604A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paperboard
- coating
- weight
- water
- polymer
- 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- Withdrawn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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/28—Polyesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
Definitions
- This invention relates to a method and apparatus for coating paperboard and, more specifically, a method and apparatus for producing coated paperboard products with a low moisture vapor transmission rate (MNTR), excellent glueability, printability, and recyclability.
- MNTR moisture vapor transmission rate
- Corrugated board is a converted or remanufactured paper product. It is a layered structure that is usually die cut to form corrugated containers. It consists of a fluted corrugated medium sandwiched between sheets of linerboard. The simplest three-ply structure is known as "double face.” As recently as 1990, much of the linerboard was made entirely from virgin, long-fibred, softwood, kraft pulp. Today, however, these board grades contain sizeable portions of recycled old corrugated containers (OCC) and many are made from 100% OCC.
- OCC recycled old corrugated containers
- OCC has a history of efficient recycling use. Even before the era of government mandates and self-imposed industry goals, almost 50% of OCC was recycled in North America. Today's recovery rate is about 62%. It is expected that a level of 70% will be achieved by the year 2000. Today, most of this recycled material goes directly from retail chain stores to mills based on long-term contracts. The rest comes from municipal curbside collection and wastepaper dealers. Some OCC is used in the production of boxboard, and some is even bleached and used in the production of fine paper, but most OCC is used again to produce corrugating medium and linerboard.
- Repulping refers to any mechanical action that disperses dry or compacted pulp fibers into a water slush, slurry or suspension. The action can be just sufficient to enable the slurry to be pumped, or it can be adequate to totally separate and disperse all the fibers.
- bales of OCC are fed into a repulper where the material is disintegrated and the gross contaminants are removed.
- the resulting stock is pumped through pressure screens and cyclonic cleaners to remove oversized materials and foreign matter. Plastics, styrofoam or other lightweight contaminants are removed by reverse cleaners.
- the glue, staples, wax, and tapes originally used to assemble the corrugated box must be removed. Untreated OCC usually creates no problems for recycling.
- paperboard is often treated or coated to enhance its performance and these coatings render the paper unrecyclable.
- corrugated paperboard is often treated with a curtain coating, wax • impregnation, lamination, sizing, or a water-based coating to reduce abrasiveness and to provide for oil and moisture resistance.
- coatings such as wax enhance the moisture resistant properties of the paperboard, the wax coating process is expensive and often renders the paperboard unrecyclable. Therefore, a need exists in the art for a coating system that enhances the usability of corrugated boxes while still allowing the containers to be recycled.
- Moisture vapor transfer rate is a scientific measurement used to describe a product's ability to allow moisture vapor to pass through it, over a specific time period, at a controlled temperature and at a designated atmospheric pressure.
- Products as diverse as frozen meat patties and fine papers are extremely sensitive to moisture gain or loss.
- Freezer burn is unsightly and adversely affects the taste of the cooked meat.
- For fine papers excessive moisture gain results in limp, hard-to-process sheets.
- Traditional solutions generally involve plastic film, either as a laminate with the paper or as a bag around the product. Both solutions are expensive or incur added labor costs, and greatly reduce or eliminate the recyclability of the shipping container. Therefore, there exists a need in the art for coatings that can provide the high moisture resistance needed without compromising the recyclability of the container.
- the MNTR of a container is dependent not only upon the coating on the corrugated paperboard, but also the method by which that coating is applied.
- Traditional methods of coating application such as a rod coater or a blade coater, may result in variations in coating thickness that will cause variations in the MNTR of the coating.
- the typical solution to this problem has been to merely increase the amount of coating applied to the paperboard. This solution can be expensive and does not result in a consistently coated product both linearly and across the web. Therefore, a need exists in the art for a process for applying a uniform coating to paperboard with very little variation in MNTR.
- an object of this invention to provide a coating system that reduces the MNTR of the paperboard product while still allowing the product to be recycled.
- the method of the present invention comprises flame-treating a paperboard product to remove surface fibers and debris, preheating the paperboard product, coating the paperboard product with a water-dispersible polymer suspension with an air-knife coater, applying heat to the coated paperboard product to dry and cure the coating, and cooling the paperboard product.
- the apparatus of the present invention comprises a flame treating means, a heating means, contour coating means for applying a water-dispersible polymer to at least one surface of the paperboard product, drying means for curing the coating, and cooling means for reducing the temperature of the coating on the paperboard product.
- FIG. 1 there is illustrated a diagrammatic representation of an apparatus 100 for and the process of making the coated paperboard product.
- the apparatus 100 can be either in-line (i.e., part of the paperboard making machine) or off-line. If the apparatus 100 is off-line the paperboard is unrolled from a raw stock roll 10 and fed into the paster assembly 12. The paster assembly 12 joins the end of one roll of paperboard to a second roll to allow continuous processing between rolls.
- paperboard refers to a web of cellulosic fibers in sheet form.
- the paperboard used in the present invention generally may be any paperboard suitable for folding cartons or corrugated board or as a substrate for laminating to a backing such as gypsum board.
- the term paperboard includes paper and paperboard of different thicknesses.
- the preferred paperboard is virgin kraft paperboard of a weight known as liner board.
- kraft paperboard is produced by a chemical cooking process using sodium hydroxide and sodium sulfide, and there are many different types of kraft paperboard manufactured with various additives and treatments for various applications.
- the invention may also make use of reprocessed paperboard, that is, not virgin kraft paperboard.
- a surface treatment may be employed as part of the conversion process to alter the surface characteristics of the specific material being used.
- Typical surface treatment processes include altering the wettability of a substrate, improving the bondability of an applied material or the elimination of an accumulated static charge.
- Surface treatment technologies can play a key role in the preparation of surfaces of paperboard for subsequent processing steps. From the paster 12, the paperboard 14 is fed through flame treating means, comprising a flame treater 16 where the surface to be coated is flamed by one or more gas burners to burn off loose fibers and debris, and reduce the water content of the paper.
- the flame treatment of the present invention has several benefits. Most importantly, it provides a better paper surface by burning off loose fibers and other surface matter that would interfere with a continuous coating.
- the loose fibers if not removed by the flame treatment, would cause disturbances in the coating, and provide a conduit for moisture to pass through the coating.
- This process commonly referred to as wickmg, attracts moisture along the loose fiber, through the coating, and into the paperboard. Not only does this cause a weakening of the paperboard, but also renders the paperboard product less effective as a moisture barrier.
- the flame treatment is very significant with respect to the ultimate strength of corrugated products in wet conditions. Accordingly, the flame treatment described in combination with the coating means, comprising an air knife coater (described below) is believed to be one of the key factors in the surprising success of the present invention as will be further illustrated below.
- Flame treatment is most commonly used for treatment of molded plastic pieces such as bottles, tubing, and automotive parts. However, it is also widely used to treat films, foils, coated boards, and other substrates.
- flame treatment the paperboard surface is passed through a flame generated by the combustion of an ultra-lean mixture of a hydrocarbon at a speed sufficient to provide the desired properties.
- flame treatment also induces an ionized air stream which alters the surface of the paperboard as it impinges upon it.
- Advantages of flame treatment over other surface treatments include freedom from ozone, pinholing, and unwanted treatment of the back of the board.
- the heat generated by the corona may dry out the fibers more than desired, causing them to expand.
- the paperboard 14 is optionally fed to a fountain blade 18 to be coated with kaolin or other types of clay according to processes well known in the art.
- a TiO 2 containing clay coating whitens the paperboard and reduces the MNTR of the final product by approximately 50%.
- a clay coating on the product of the current invention will result in an MNTR of less than 1.0.
- a second flame treater downstream from said fountain blade to further reduce surface debris.
- downstream refers to a point in the disclosed apparatus that is placed further along the paperboard path from the point of origin in the direction of the movement of the paperboard.
- a second flame treatment is optional and not required by the present invention.
- the paperboard 14 is then fed to and heated by a pre-heater 20.
- the pre-heater 20 applies heat to the surface of the paperboard 14, preferably to the surface to be coated, reducing the moisture content thereof. This aids in greater impregnation of the coating into the paperboard 14 since the coating tends to replace the driven-off moisture.
- the pre-heating is controlled so as not to drive off all the moisture, or too much moisture, particularly from the opposite face of the paperboard, as the opposite face could become so dry as to reattract moisture later and cause unwanted curling.
- the paperboard 14 is fed through a series of rollers to coating means.
- coating means There are four main kinds of modem coating processes: blade coating, air knife 24 coating, roll coating, and rod coating.
- Blade coating and air knife coating can be done in line or off the paperboard machine.
- Rod coating usually is done "off the paperboard machine and can either be a complete coating or a first coat followed by an "off-machine" coating by the blade or air knife process. While all four coating methods may be used in the present invention, it has surprisingly been found that air knife 24 coating results in the most consistent coating.
- the coating mixture is applied by a metal roller and distributed by a thin, flat jet of air from a slot in a metal blade extending across the machine.
- blade coating the mixture is applied to the surface by rollers to give a thin, level coating. Excess coating is removed by a thin flexible metal blade as it smoothes the surface.
- the coating composition used in this invention is a water-dispersible polymer suspension, preferably comprising 20 % - 40% solids.
- the preferred coating composition is an aqueous dispersion of a polyester resin; preferably, polyethylene terephthalate (PET).
- a further preferred water-dispersible polymer is a water-soluble or water-dispersible polyester resin as described in U.S. Patent No. 4,977,191 (Salsman), incorporated herein by reference. More specifically, U.S. Patent No. 4,977,191 describes a water-soluble or water- dispersible polyester resin, comprising a reaction product of 20-50% by weight of waste terephthalate polymer, 10-40% by weight of at least one glycol and 5-25% by weight of at least one oxyalkylated polyol.
- a further preferred water-dispersible polymer is a sulfonated water-soluble or water dispersible polyester resin composition as described in United States Patent No. 5,281,630 (Salsman), incorporated herein by reference.
- United States Patent No. 5,281,630 describes an aqueous suspension of a sulfonated water-soluble or water dispersible polyester resin comprising a reaction product of 20-50% by weight terephathlate polymer, 10-40% by weight at least one glycol and 5-25% by weight of at least one oxyalkylated polyol to produce a prepolymer resin having hydroxyalkyl functionality, wherein the prepolymer resin is further reacted with about 0.10 mole to about 0.50 mole of an alpha, beta-ethylenically unsaturated dicarboxylic acid per 100 g of prepolymer resin and a thus produced resin, terminated by a residue of an alpha, beta-ethylenically unsaturated dicarboxyclic acid, is reacted with about 0.5 mole to about 1.5 mole of a sulfite per mole of alpha, beta-ethylenically unsaturated dicarboxylic acid residue to produce a sulf
- United States Patent No. 5,726,277 describes coating composition comprising a reaction product of at least 50% by weight of a waste terephthalate polymer and a mixture of glycols including an oxyalkylated polyol in the presence of a glycolysis catalyst wherein the reaction product is further reacted with a difunctional, organic acid and wherein the weight ratio of acid to glycols is in the range of 6 : 1 to 1 : 2.
- this dispersion is obtained by mixing a linear polyester resin with a surface-active agent of the higher alcohol/ethylene oxide addition type, melting the mixture, and dispersing the resulting melt by pouring it into an aqueous solution of an alkanolamine under stirring at a temperature of 70°-95° C, said alkanolamine being selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, monomethylethanolamine, monoethylethanolarnine, diethylethanolamine, propanolamine, butanolamine, pentanolamine, N-phenylethanolamine, and an alkylolamine of glycerine, said alkanolamine being present in the aqueous solution in an amount of 0.2 to 5 weight percent, said surface-active agent of the higher alcohol/ethylene oxide addition type being an ethylene oxide addition product of a higher alcohol having an alkyl group of at least 8 carbon atoms, an alkyl-substituted phenol or a sorbitan monoacy
- U.S. Patent No. 4,528,321 discloses a dispersion in a water immiscible liquid of water soluble or water swellable polymer particles and which has been made by reverse phase polymerisation in the water immiscible liquid and which includes a non-ionic compound selected from C 4 2 alkylene glycol monoethers, their C L4 alkanoates, C 6 . 12 polyalkylene glycol monoethers and their C M alkanoates.
- the jet shears the liquid film, and removes the excess as liquid, spray, or mist. This excess is then collected in a blow off containment system.
- the angle between the center line of the air jet and a radial line passing through the impingement point has a great effect on coating surface quality.
- operating at too high an angle can cause vertical lines in the machine direction; while operation at too low an angle can cause cross machine lines that are one-half inch to one inch long.
- a coating is applied in excess by a roller to the paperboard 14 at the applicator section. Water in the coating immediately begins to migrate at the interface of the wet coating and the paperboard 14 so that the coating at this point immediately becomes semi-dry or plastic. As the sheet of paperboard passes under the air knife 24 jet, part of the fluid coating is removed from the sheet by the air knife. There is a zone in the coating cross section where the coating makes the transition from the fluid to a semi-plastic coating, and it is in this area that the air knife shearing takes place. The exact point at which the shear takes place varies with the amount of energy of the air blast. At a very high pressure or velocity of air from the air knife, the air penetrates more into the coating, leaving less coating on the sheet. The typical air pressure used in the air knife is from two to nine pounds per square inch.
- the air knife 24 is a contour coater. Thus, it applies a relatively uniform coating thickness regardless of surface roughness. The air knife 24 minimizes variations in coating thickness, and thereby provides a more consistent MNTR of the paperboard 14.
- the paperboard 14 is then passed to drying means, comprising a hood dryer 26 and an IR dryer 30.
- the hood dryer 26 may be heated by natural gas or otherwise, to dry and, depending on the nature of the coating, at least partially cure the coating.
- a first roller 22 and a second roller 28 move the paperboard through the dryer. These rollers 22, 28 may be heated by natural gas.
- the hood dryer 26 elevates the temperature of the coating to the curing temperature of the coating.
- the IR dryer 30 continues the drying and curing process begun in the hood dryer 26. It is believed that the molecules of the coating will begin to cross-link with each other and bind to the fibers of the paperboard during the drying process. Furthermore, moisture is removed from the coating, leaving solid polyester particles on the paperboard.
- the polymer becomes hydrophobic and it is believed that the hydroxyl groups in the polymer are bound to the cellulose in the paperboard 14. Once the polyester forms this hydrophobic coating, it is believed that it continues to cold flow which consequently decreases the MNTR of the paperboard 14.
- the polyester coating begins to cross-link in the dryer, it does not completely do so. This is beneficial in that if the paperboard 14 is fed into a corrugator at a later time, the polymer (e.g. polyester) will expand due to the heat involved in the corrugating process. This allows the coating to "breathe” and let any moisture remaining in the coated paperboard 14 to escape without damaging the film coating, as can occur in the prior art. As the paperboard 14 cools after being heated in the corrugator, the polymer coating once again forms a barrier.
- the polymer e.g. polyester
- Another benefit of the present coating is its resistance to scuffing or chiming. Chiming occurs in the beverage industry when the paperboard is scuffed and the round impression of beverage cans is made where the coating suffered the abrasion. Because the coating of the present invention is partially cured prior to such processes, it exhibits a remarkable degree of resistance to such scuffing.
- the paperboard 14 is then passed to cooling means, comprising a curtain blower 32, axial fans 34, and a plurality of cooling rolls 36.
- the curtain blower 32 can be, for example, a squirrel cage blower.
- the curtain blower 32 blows heat from the coated paperboard 14 back towards the IR dryer 30. This prevents the paperboard 14 from transferring excessive amounts of heat to the cooling rolls 36.
- the fans 34 and cooling rolls 36 continue the curing process of the coating.
- the cooling rolls 36 are chilled by pumping a chilled liquid through them, lowering the temperature thereof to a maximum of 160 degrees Fahrenheit. As the coated paperboard 14 passes from the dryers, it may be in semi-molten state. The rapid drop in temperature provided by the cooling means 34, 36, 32 furthers the curing process of the coating.
- the calender rolls 38 which consists of a stack of polished cast iron or steel rollers mounted one on top of the other.
- the function of the calender rolls 38 is to increase the smoothness and gloss of the surface of the paperboard as it passes between the rollers (not individually shown).
- a reel drive 40 is provided downstream relative to the coater for assisting the machine drives (not shown) in driving the paperboard for winding on take-up roll 42.
- Conditions are controlled and varied throughout the process to give the desired product.
- the weight and consistency of the coating on the paperboard is controlled by controlling the temperature of the various stages of the process, the machine speed, and the air knife pressure.
- the temperatures of the heating means 20, dryers 26, 30, and the cooling means 32, 34, 36 are controlled independently and can be varied to result in the desired coating properties by one of skill in the art with only routine experimentation.
- the machine speed can be controlled by controlling the speed of the machine drives.
- the air knife 24 pressure can typically be controlled by adjusting the discharge pressure or inlet volume, or both, of the air knife 24 by either a throttling device or by adjustment of the blower speed.
- the coating weight is dependent upon the percent solids in the coating solution. While the percentage solids employed will vary with line speed and application pressure, typically a polymer dispersion of 20 % - 40 % solids is suitable, with 27 % - 32 % solids being preferred.
- the paperboard product, once formed, can be collected on a roll 42 as shown in FIG.
- the completed paperboard product can be passed to a corrugator for incorporation into corrugated board.
- a corrugator typically unwinds two or more continuous paper from rolls, presses flutes into the sheet of corrugating medium, applies adhesive to the tips of the flutes and bonds the sheet of paperboard to form corrugated board.
- MICHELMAN and SPECTRA COAT were applied with a rod or blade coater; LAMILUX was applied as a film; and POLYSUPREME was applied with an air knife in accordance with the present invention.
- MICHELMAN and SPECTRA COAT coatings are compatible with the present invention, and it is suspected that had they been applied in accordance with the present invention, their properties would be similar to POLYSUPREME.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2000/011237 WO2001083118A1 (en) | 1998-11-17 | 2000-04-27 | Process for coating paperboard with a water-dispersible polyester polymer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1278604A1 true EP1278604A1 (en) | 2003-01-29 |
EP1278604A4 EP1278604A4 (en) | 2010-03-17 |
Family
ID=21741318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00926398A Withdrawn EP1278604A4 (en) | 2000-04-27 | 2000-04-27 | Process for coating paperboard with a water-dispersible polyester polymer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1278604A4 (en) |
JP (1) | JP2003533599A (en) |
AU (1) | AU2000244931A1 (en) |
CA (1) | CA2407271C (en) |
MX (1) | MXPA02010578A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200447378Y1 (en) | 2008-01-24 | 2010-01-20 | 양동영 | Coating device of film |
CN107413577A (en) * | 2017-08-31 | 2017-12-01 | 中山诺顿科研技术服务有限公司 | A kind of antifouling Wax applyor of ceramics |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2968576A (en) * | 1955-07-19 | 1961-01-17 | Howard Plastics Inc | Process of coating a polyethylene substrate with a vinylidene coating and resultant article |
US5360663A (en) * | 1992-05-13 | 1994-11-01 | Showa Highpolymer Co., Ltd. | Polyester laminates |
EP0759365A1 (en) * | 1995-08-21 | 1997-02-26 | New Oji Paper Co., Ltd. | Ink jet recording material and producing process thereof |
EP0770493A1 (en) * | 1995-10-24 | 1997-05-02 | Oji Paper Co., Ltd. | Support and ink jet recording material containing the same |
US5633041A (en) * | 1996-05-10 | 1997-05-27 | Eastman Kodak Company | Method of making photographic paper |
US5736204A (en) * | 1992-10-16 | 1998-04-07 | The Estate Of Leonard Pearlstein | Compostable packaging for containment of liquids |
WO1998053141A1 (en) * | 1997-05-23 | 1998-11-26 | Cargill, Incorporated | Polylactide coated paper |
US6005068A (en) * | 1992-10-02 | 1999-12-21 | Cargill Incorporated | Melt-stable amorphous lactide polymer film and process for manufacture thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09108614A (en) * | 1995-10-18 | 1997-04-28 | Fuji Photo Film Co Ltd | Coating applying method |
JP3832064B2 (en) * | 1997-12-24 | 2006-10-11 | 王子製紙株式会社 | Inkjet recording sheet |
US6113981A (en) * | 1998-11-17 | 2000-09-05 | Madison-Oslin Research | Process for coating paperboard with a water-dispersible polyester polymer |
US6029582A (en) * | 1999-03-18 | 2000-02-29 | Ogilvie, Jr.; Morgan O. | Force resisting corrugated assembly |
-
2000
- 2000-04-27 JP JP2001579990A patent/JP2003533599A/en active Pending
- 2000-04-27 AU AU2000244931A patent/AU2000244931A1/en not_active Abandoned
- 2000-04-27 CA CA002407271A patent/CA2407271C/en not_active Expired - Fee Related
- 2000-04-27 MX MXPA02010578A patent/MXPA02010578A/en active IP Right Grant
- 2000-04-27 EP EP00926398A patent/EP1278604A4/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2968576A (en) * | 1955-07-19 | 1961-01-17 | Howard Plastics Inc | Process of coating a polyethylene substrate with a vinylidene coating and resultant article |
US5360663A (en) * | 1992-05-13 | 1994-11-01 | Showa Highpolymer Co., Ltd. | Polyester laminates |
US6005068A (en) * | 1992-10-02 | 1999-12-21 | Cargill Incorporated | Melt-stable amorphous lactide polymer film and process for manufacture thereof |
US5736204A (en) * | 1992-10-16 | 1998-04-07 | The Estate Of Leonard Pearlstein | Compostable packaging for containment of liquids |
EP0759365A1 (en) * | 1995-08-21 | 1997-02-26 | New Oji Paper Co., Ltd. | Ink jet recording material and producing process thereof |
EP0770493A1 (en) * | 1995-10-24 | 1997-05-02 | Oji Paper Co., Ltd. | Support and ink jet recording material containing the same |
US5633041A (en) * | 1996-05-10 | 1997-05-27 | Eastman Kodak Company | Method of making photographic paper |
WO1998053141A1 (en) * | 1997-05-23 | 1998-11-26 | Cargill, Incorporated | Polylactide coated paper |
Non-Patent Citations (1)
Title |
---|
See also references of WO0183118A1 * |
Also Published As
Publication number | Publication date |
---|---|
MXPA02010578A (en) | 2004-05-17 |
AU2000244931A1 (en) | 2001-11-12 |
CA2407271A1 (en) | 2001-11-08 |
EP1278604A4 (en) | 2010-03-17 |
CA2407271C (en) | 2008-09-02 |
JP2003533599A (en) | 2003-11-11 |
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