CN101389727B - Method for treating a substrate - Google Patents

Method for treating a substrate Download PDF

Info

Publication number
CN101389727B
CN101389727B CN200780006404XA CN200780006404A CN101389727B CN 101389727 B CN101389727 B CN 101389727B CN 200780006404X A CN200780006404X A CN 200780006404XA CN 200780006404 A CN200780006404 A CN 200780006404A CN 101389727 B CN101389727 B CN 101389727B
Authority
CN
China
Prior art keywords
coating
substrate
film
polymers
aqueous solutions
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 - Fee Related
Application number
CN200780006404XA
Other languages
Chinese (zh)
Other versions
CN101389727A (en
Inventor
G·P·福吉特
S·E·金瑟
J·W·斯托拉兹
R·W·卡尔森
S·H·小麦格鲁
S·P·梅茨勒
T·J·格林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WestRock MWV LLC
Original Assignee
Meadwestvaco Corp
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 Meadwestvaco Corp filed Critical Meadwestvaco Corp
Publication of CN101389727A publication Critical patent/CN101389727A/en
Application granted granted Critical
Publication of CN101389727B publication Critical patent/CN101389727B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • 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
    • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
    • D21H19/70—Coatings characterised by a special visual effect, e.g. patterned, textured with internal voids, e.g. bubble coatings
    • 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
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

A method for treating a substrate is described. In accordance with one aspect, the method includes applying a polymer coating to a substrate, and bringing the polymer coating into contact with a heated surface while the coating is still in a wet state. Optionally the polymer coating may include a crosslinkable material, and a crosslinking agent may be used to promote crosslinking. The polymer coating replicates the heated surface. A product produced in accordance with the described method is also disclosed. The product is characterized by having subsurface voids within the coating.

Description

Process the method for substrate
MULTIPLE-BLADE
The application requires the benefit of priority of the provisional application sequence number 60/776114 of submission on February 23rd, 2006 according to 35 U.S.C. § 119 (e), this paper introduces it in full as a reference.
Background of invention
The disclosure relates to the method with polymer film forming compositions-treated substrate.More specifically, the disclosure relates to a kind of Paper or cardboard manufacture method, comprises step: apply polymer film forming and be coated with and expect on the substrate, and make the surface of polymer coating Contact Heating when polymer coating still is in hygrometric state.The polymer layer that obtains has smooth surface, just has space (for example bubble) in surface underneath.In some embodiments, polymer coating can comprise the crosslinkable hydrogel, and crosslinker solution can be applied on the polymer coating on the substrate surface, is formed to whereby the crosslinked polymer coating of small part, then with the Surface Contact of heating.The disclosure also relates to the substrate product of processing.
Make paper by the basic continous production technique, wherein the moisture dilute slurry of cellulosic fibre flow into the green end of paper machine, and the fixed dry width of cloth of indefinite length from the paper machine dry end continuously out.The green end of paper machine comprises one or more head boxs, draining section and extruded segment.It is cylindric that the dry end of modern paper machine is included under the thermal limit cover structure a plurality of steam-heated rotation shell-type that distributes along the Curved width of cloth approach of advancing.Although for each of these paper machine workshop sections a large amount of design variable are arranged, commercial most important variant is fourdrinier machine, and wherein head box discharges one wide slurries to the diaphragm with superfine mesh.
Sieve is fabricated and drives as the endless belt of transporting at a large amount of supporting rolls or paper tinsel.Pressure reduction drawing-off water from slurries from contact slurries side to opposite side on the sieve passes through sieve, this workshop section of sieve partly advances along the platform of sieve route loop simultaneously, because slurry dilution water is extracted, so the fibre composition of slurries is gathered on the sieve surface as wet but substantially fixed pad.When arriving sieve loop board length ends, pad has been assembled enough quality and tensile strength to reach the short physical clearance between sieve and the first pressure roller.This first pressure roller carries pad in the first press nip, and the water that wherein is retained in the main volume in the pad is removed by the roll gap squeezing.One or more other roll gaps can be followed in the back.
Usually show now the feature of net from the pad continuum of extruded segment, the dryer section that enters paper machine makes remaining water be removed by the thermodynamics mode.
Generally speaking, the most important fiber for papermaking derives from cork and hardwood seeds.Yet, used in some cases the fiber that obtains from straw or bagasse.The chemistry of knowing in the prior art all is used to separate paper-making fibre from the composition of spontaneous growth with mechanical defiber technique.The paper-making fibre that obtains by chemical defiber technique and method is commonly called dissolving pulp, and the paper-making fibre that is obtained by mechanical defiber method can be called as groundwood pulp or mechanical pulp.The defiber technique that also has combination is such as half chemistry, thermochemistry or heat engine tool technique.Can be to any one defiber in the seeds by chemistry or mechanical means.But some seeds and defiber technique have better economy or function match than some other.
Important difference between chemistry and the mechanical pulp is that mechanical pulp can be directly delivers to paper machine from the defiber stage.On the other hand, dissolving pulp must be minimum behind chemical steaming by mechanical defiber, washing and screening.Usually, going back the machine finish dissolving pulp after the screening and before paper machine.In addition, the average fiber length of mechanical pulp is shorter than the average fiber length of dissolving pulp usually.But staple length also highly depends on the wood kind of fiber source.Cork fibrous is about 3 times than hardwood fiber usually.
The final character of concrete paper is determined with the mode that becomes these raw materials of width of cloth art breading by raw materials used kind and paper machine to a great extent.Important operation factors is head box and sieve in the device of formation paper web.
Usually requirement is for smoothness and the impressionability of excellence and the certain strength and stiffness feature of printing and have for the coating Paper or cardboard of packing high gloss level, excellence.
If the coating Paper or cardboard has high rigidity, it just can have less feed and stop up level and smooth high speed printing or the wrapping machine of passing through in ground.Higher stiffness paper can be advantageously utilised in book, magazine and the list, because it provides hardness or the thick and heavy sensation that is similar to bound book.For packing, high rigidity is essential for keep the board product structural integrity in filling and subsequently use procedure.
Basic weight and the density of rigidity and paper have substantial connection.Rigidity increased when general trend was the basic weight increase, stiffness degradation when paper density increases.Can improve rigidity and other character by increasing basic weight.But this will produce and utilize the more product of multifilament, and this has increased cost and weight.Therefore, need to have high rigidity but a coating Paper or cardboard of medium basis weights.Paper with medium basis weights is also more economical, because used less raw material (fiber).In addition, less for low basic weight paper based on the transportation cost of weight.
Except high rigidity, the coating Paper or cardboard that frequent requirement must be printed has high glossiness and smoothness.For the coating Paper or cardboard with this class mass property, generally must increase density extremely to a certain degree to allow having spendable print surface.Usually obtain smoothness by calendering.But the calendering meeting causes thickness to reduce, and this generally causes corresponding Stiffness.The calendering process has been destroyed rigidity owing to significantly having reduced thickness and having increased density.Generally come densification conventional coated panel level in thick and heavy ground to provide to be low to moderate with substrate (base sheet) by calendering and be enough to produce the surfaceness that industry can accept finally to be coated with smoothness.These calendering processes comprise that wet stacking processing can increase the density of as many as 20%-25%.
Therefore, for the fiber of per unit area to determined number, between glossiness and the rigidity and the relation between smoothness and the rigidity usually each other in reverse proportionality.The packing level is sold based on paper thickness, and the manufacturing process that therefore reduces thickness (increase paperboard densities) has reduced commercial value.The technique that causes less thickness to descend has been saved material cost.Thickness is measured with " point ", its mid point=0.001 inch.For example, the ordinary method of making 10 cardboards requires to use thickness before the calendering greater than 12 cardboard.Wish to make the finished product cardboard that has roughly the same thickness with initial substrate.
Calendering technique comprises moisture gradient calendering, hot calendering, soft calendering and has improved a little the rigidity of given thickness with the improvement of calendering, but do not change the basic ratio between thickness, rigidity, smoothness and the printing.
Propose various suggestions and be used for printing without the rigidity that calendering improves the coating Paper or cardboard.For example, several proposals comprise high cork content in the raw material, add custom-designed fiber in raw material, add high starch or the copolymer latices of glass transformation temperature (often being called " Tg ") of high quantity in highly-branched polymers and the formulation for coating material in raw materials.
But, although the latent defect of these rigidity improvement methods is that they are being that effectively they may reduce smoothness, glossiness and/or the impressionability of the White Board that obtains aspect the raising paper rigidity.
For the above reasons, be very difficult to obtain gratifying paper smoothness in the density situation not increasing.Can use other method to change density in paper and the cardboard level/smoothness relation.Apply paper coating and be strengthen paper surface character and do not cause the very common method that paper density sharply increases, paper density sharply increase general with obtain certain smoothness level need to the calendering level relevant.Preferably, final coated surface should be evenly to provide acceptable outward appearance and printing.
Therefore, be desirable to provide the Paper or cardboard product that has required character while retention tab initial density or minimize the density increase.In addition, be desirable to provide the smoothness that shows improvement and the Paper or cardboard of following increase less than the density not relevant with the ordinary method that forms smoothness.Existing curtain coating coating process produces very smooth surface, but these methods are generally moved under the production rate slower than many paper machine speed.
Open general introduction
In one embodiment, disclose product, it comprises substrate, has coating at substrate.Coating comprises water-soluble polymers and release agent.The space that in coating, has formation.
In another embodiment, product is disclosed, it comprises substrate, has coating at substrate.Coating comprises water-soluble polymers and does not substantially have elastomer material.The space that in coating, has formation.
In another embodiment, product is disclosed, it comprises substrate, has coating at substrate.Coating comprises the surface, and the surface has less than the about Sheffield smoothness of 300 units.The space that formation is arranged under coatingsurface.
In another embodiment, product is disclosed, it comprises substrate, has coating at substrate.Coating comprises water-soluble polymers, release agent and does not substantially have elastomer material.Coating comprises the surface, and the surface has less than the about Sheffield smoothness of 300 units.The space that formation is arranged under coatingsurface.
In another embodiment, the method for processing substrate is disclosed.The wet film of aqueous solutions of polymers is applied on the substrate.Cause that by the surface that makes the aqueous solutions of polymers Contact Heating aqueous solutions of polymers boiling and at least part of dry polymer aqueous solution fix aqueous solutions of polymers.
In another embodiment, the method for processing substrate is disclosed.The wet film of aqueous solutions of polymers is applied on the substrate.Cause that by the surface that makes the aqueous solutions of polymers Contact Heating space and at least part of dry polymer aqueous solution that aqueous solutions of polymers boiling and formation are retained in the aqueous solutions of polymers fix aqueous solutions of polymers.
In another embodiment, the method for processing substrate is disclosed.The coating of aqueous solutions of polymers is applied on the substrate as wet film.Coating comprises water-soluble polymers and release agent.Be less than approximately 3 seconds in order to cause the aqueous solutions of polymers boiling and in film, form the space and at least part of desciccator diaphragm fixes film by making the film Contact Temperature be higher than approximately 150 ℃ heating surface.
In another embodiment, the method for processing substrate is disclosed.The coating of aqueous solutions of polymers is applied on the substrate as wet film.Coating comprises water-soluble polymers and does not substantially have elastomer material.Be less than approximately 3 seconds in order to cause the aqueous solutions of polymers boiling and in film, form the space and at least part of desciccator diaphragm fixes film by making the film Contact Temperature be higher than approximately 150 ℃ heating surface.
In another embodiment, the method for processing substrate is disclosed.The coating of aqueous solutions of polymers is applied on the substrate as wet film.Coating comprises water-soluble polymers and does not substantially have elastomer material.Be less than approximately 3 seconds in order to cause the aqueous solutions of polymers boiling and in film, form the space and at least part of desciccator diaphragm fixes film by making the film Contact Temperature be higher than approximately 150 ℃ heating surface.Dried coatingsurface has less than the about Sheffield smoothness of 300 units.
In another embodiment, the method for processing substrate is disclosed.The coating of aqueous solutions of polymers is applied on the substrate as wet film.Coating comprises water-soluble polymers, release agent and does not substantially have (essentially no) elastomer material.Be less than approximately 3 seconds in order to cause the aqueous solutions of polymers boiling and in film, form the space and at least part of desciccator diaphragm fixes film by making the film Contact Temperature be higher than approximately 150 ℃ heating surface.Dried coatingsurface has less than the about Sheffield smoothness of 300 units.
In another embodiment, the method for processing the Mierocrystalline cellulose substrate is disclosed.The wet film of aqueous solutions of polymers is applied on the substrate.Aqueous solutions of polymers comprises with dry weight basis at least about 60% water-soluble polymers with dry weight basis 10% release agent at the most.Be less than approximately 3 seconds in order to cause the aqueous solutions of polymers boiling and in aqueous solutions of polymers, form the space and at least part of dry polymer aqueous solution fixes aqueous solutions of polymers by making the aqueous solutions of polymers Contact Temperature be higher than approximately 150 ℃ heating surface.
The accompanying drawing summary
Fig. 1 is a kind of embodiment according to the present invention is processed the device of substrate with polymeric coating schematic diagram.
Fig. 2-9 is for showing according to a kind of embodiment preparation according to the present invention and having the sectional view of pattern of the sample of top coat.
Figure 10-1 2 is the cross-section photograph of demonstration according to the pattern of the sample of one embodiment of this invention preparation.
Figure 13-1 4 is the surface picture with scanning electron microscope acquisition of demonstration according to the pattern of the sample of one embodiment of this invention preparation.
Figure 15-16 is the surface picture with back scattering scanning electron microscope acquisition of demonstration according to the pattern of the sample of one embodiment of this invention preparation.
Figure 17 is for showing the figure according to space distribution of sizes in the sample of one embodiment of this invention preparation.
Detailed Description Of The Invention
When describing preferred embodiment, will be for clear some technical term that uses.Plan this class technical term not only comprise the embodiment of mentioning and also comprise in a similar manner, for similar purpose, obtain similar effect and all technical equivalents of using.Quoting of any document is not regarded as approving that it is with respect to prior art of the present invention.Unless except as otherwise noted or context advise in addition, all wt, per-cent and ratio are all by weight.
The disclosure relates to the method for processing substrate with polymer film forming coating.More specifically, the disclosure relates to the Paper or cardboard manufacture method, comprises step: apply polymer coating to substrate, and make the surface of polymer coating Contact Heating when polymer coating still is in hygrometric state.The boiling of water causes forming the space under the surface in the polymer coating, and the surface of film is smooth.The Paper or cardboard of producing according to embodiments more of the present invention shows desirable surface finish and smoothness level, does not have obvious body paper densification.In some embodiments, polymer coating can comprise crosslinkable materials, and crosslinker solution can be applied on the polymer coating on the substrate surface, thereby is formed to the crosslinked polymer film forming composition of small part.In this case, polymer coating generally can at first be applied on the paper web, then applies crosslinker solution before the surface of processed paper web Contact Heating.For weak cross-linked polymer, can in coating self, provide crosslinker solution.
An advantage processing substrate with polymer film forming coating according to the present invention relates to can obviously not increased the density of sheet or reduce the thickness of sheet with regard to the raising of getable smoothness and/or planeness.Do not require that the Mierocrystalline cellulose paper web thick and heavy calendering relevant with routine techniques produces the paper that has with the comparable printing of conventional White Board.In addition, even the Mierocrystalline cellulose paper web is flattened when sliding, also can only applies much lower pressure and come to provide similar printing at the paper that rigidity increases.According to embodiments more of the present invention, smooth Mierocrystalline cellulose paper web is no more than approximately 7% so that thickness reduces, and generally reduces approximately between 2% and 5%.By comparison, conventional White Board generally under much higher pressure before coating by calendering, this causes the density of about 20-25% to increase.According to an aspect of the present invention, before applying polymeric film, the Mierocrystalline cellulose paper web can be calandered to the approximately Parker Print Surf smoothness between 2 and 6 microns.But, can use the substrate with higher Parker Print Surf value.For example, can use Parker Print Surf smoothness to be about 9 microns substrate.Measure Parker Print Surf smoothness according to TAPPI standard T 555 om-9.
Fig. 1 illustrates be used to the device 10 of implementing embodiments more of the present invention.On 12 1 surfaces of substrate, it is processed to form polymer coating layer 16 at substrate 12 with crosslinkable polymer coating 14.Although polymer coating is still wet, can apply optional crosslinker solution 18 to polymer coating layer 16, form cross-linked polymer coating 20 at substrate 12 thus.Polymer coating 20 is generally by at least part of crosslinked.By before contacting the polishing rotating cylinder 22 of heat against drum surface with pressure roller 24 extruding paper webs 12, polymer coating still is in hygrometric state.Cause in the wet polymer coating from the thermal conductance of drum surface and to seethe with excitement, thereby under the surface, in polymkeric substance, form the space.Crosslinker solution makes the crosslinked and gel of polymer coating become layer or the film of basic continous.Usually, the film that obtains will show the raising intensity above substrate.The sheet of polymer treatment may be by abundant drying, thereby can carry it to pass through secondary heater 26.Can use any type the second heating installation that dry to have processed sheet and can negative impact sheet character.The substrate 28 that the sheet of processing was processed as the polymeric film of the planeness that is characterised in that raising and smoothness from secondary heater 26 out.Randomly, can use additional coated technique 30 (with other technique such as coating, gloss calendering etc.) form and apply product 32.
As shown in Figure 1, paper web twines the major part of the polishing rotating cylinder 22 of heat.Twine quantity and can be depending on moisture content, rotating cylinder temperature and other technological factor that operational condition such as web speed, polymeric film form composition 20.With a small amount of duration of contact of the polishing rotating cylinder 22 of heat may also be possible enough just.Except providing the substrate with the paper web form, also can the sheet form provide.
Can apply crosslinkable polymer coating and optional crosslinker solution by numerous technology, as dip-coating, rod be coated with, scraper is coated with, the intaglio plate roller coat, reverse roller coat, metering size press, smooth roller coat, extrude coating, curtain coating, spraying etc.Can apply by identical coating technology crosslinkable polymer coating and crosslinker solution, or each is used diverse ways.
A kind of embodiment according to the present invention is based on condensing or gelling of occuring between polyvinyl alcohol and borax.According to this system, polyvinyl alcohol (PVOH) is the example of crosslinkable polymer, and borax soln is the example of corresponding linking agent.In case apply PVOH solution 14, about 25% solids content and about 5g/m 2Do fraction of coverage, just to provide at least about 0.1 g/m 2The speed of dried borax fraction of coverage and solution solids apply cross-linking agent solution 16.Then by making the hot polishing rotating cylinder 22 of this wet cross-linked polymer film 20 contacts with pressure roller 24 extruding paper webs 12 against drum surface.The drum surface temperature is at least about 150 ℃, or according to some embodiments, at least about 190 ℃, thereby coating can be dried and break away from drum surface.The duration of contact of polymeric film and rotating cylinder can be in the scope that is no more than approximately 3.0 seconds, more specifically at about 0.5-2.0 between second.This is the sufficient time that polymeric film is fixed and solidified, and gives the level and smooth smooth finish of polymer film surface reflection drum surface.The fixed polymer film comprises at least part of desciccator diaphragm.When coating leaves rotating cylinder, there is no need complete drying, thereby may need drying aid 26.Then paper web continues by this technique and can accept other dope layer before rolled-up, for example conventional coating.Polymer coating can be used as simple layer or applies as two or more layers.Limited experiment also shows, can utilize the rotating cylinder of the Contact Heating of moment only to fix or the solidified polymeric film, and this can by realizing against hot rotating cylinder 22 with pressure roller 24 extruding paper webs 12, not need paper web to center on any additional winding of hot rotating cylinder.But, considered to implement some windings of hot rotating cylinder, and randomly can use felt 23 to help the extruding paper webs to contact hot rotating cylinder.If use felt 23 to help the extruding paper web to contact hot rotating cylinder, then can between pressure roller 24 and hot rotating cylinder 22, carry felt 23.
Contact between polymeric film and the hot rotating cylinder causes seething with excitement in polymeric film, forms space or bubble in film.Should adjust the roll gap condition so that boiling can occur.Utilize rebound resilience pressure roller, 9 " wide paper web and approximately 2 obtain gratifying laboratory result to the about load of the roll gap between 15 pounds of every linear inches.According to the diameter of pressure roller hardness and hot rotating cylinder and pressure roller, may regularization condition.
The object lesson that is used for the crosslinkable polymer of some embodiments of the present invention comprises the crosslinkable hydrogel.Following crosslinkable hydrogel is particularly useful: starch, waxy corn, protein, polyvinyl alcohol, casein, gelatin, soybean protein and alginate.Can use one or more polymkeric substance that are selected from above-mentioned.Crosslinkable polymer generally is applied in the solution form, and usually as the aqueous solution.Concentration to polymkeric substance in the solution does not have particular restriction, but those of ordinary skill in the art can easily determine.For example, as described below, can use the approximately solution of 20% starch.Can apply crosslinkable polymer to provide approximately 3 to about 15gsm (g/m 2), more particularly approximately 4 to the about surface coverage of 8gsm (butt).According to specific embodiments of the present invention, but usage quantity is that the approximately 60wt% of dry substance is to the about crosslinkable polymer of 100wt%.
The object lesson of linking agent comprises borate, aldehyde, ammonium salt, calcium cpd and their derivative.If use, linking agent generally can be applied in the solution form, usually as the aqueous solution.Concentration to linking agent in the solution does not have particular restriction, but those of ordinary skill in the art can easily determine.Can apply linking agent with provide approximately 0.1 to about 0.5gsm, more specifically approximately 0.2 to the about surface coverage of 0.3gsm (butt).
The temperature on the surface of heating surpasses the temperature that is generally used for the curtain coating coating.Higher temperature should allow higher travelling speed.Can expect that the Paper or cardboard produced according to embodiments more according to the present invention can be approximately 750 to 3000fpm, more specifically approximately produce under 1500 to 1800fpm the speed.Although do not wish bound by theory, select higher temperature and the residence time so that coating composition is heated to its boiling temperature, and the contact area that seems between coating and the rotating cylinder increases when coating seethes with excitement.The contact that increases produces the polymeric film heating surface of the smoothness and the glossiness that show raising.The surface of processing in addition, is the oleophylic China ink.As if the boiling of coating when being flattened of polishing drum surface obviously improved glossiness and the smoothness of the substrate of final polymeric film processing.
Then polymer coating on the general extruding substrate is frozen into the smooth glossy surface layer (a smooth, glossy finish) that is coated with against the surperficial time enough of heating to allow coating to seethe with excitement.According to specific embodiments, form the duration of contact of polymeric film (forming polymer film) to the rotating cylinder in the scope that is no more than approximately 3.0 seconds, more specifically be no more than approximately 2.0 seconds, the most especially be no more than approximately 0.5 second.
Polymer coating also can comprise one or more pigment.The example of useful pigment includes but not limited to that kaolin, talcum, calcium carbonate, calcium acetate, titanium dioxide, clay, zinc oxide, aluminum oxide, aluminium hydroxide and synthetic silica such as amorphous silica, soft silica or finely divided silicon-dioxide are its examples.Also can use pigment dyestuff.
Crosslinkable polymer coating and/or crosslinker solution also can comprise one or more release agents.The object lesson of useful release agent includes but not limited to wax such as oil, vegetable wax, animal wax and synthetic wax, fatty acid metal soap such as metallic stearate, long-chain alkyl derivative such as fatty ester, fatty amide, aliphatic amide, lipid acid and Fatty Alcohol(C12-C14 and C12-C18), polymkeric substance such as polyolefine, silicone polymer, fluoropolymer and natural polymer, fluorinated compound such as fluoride fat acid and their combination herein.The quantity of the release agent that those of ordinary skills will use in can easily determining specifically to use.Usually, coating can comprise the approximately release agent of 0.3-10%, more particularly about 2-5wt%.Replace or except the release agent in coating, release agent also can be sprayed onto on the coating surface, or be applied on the drum surface of heating.If can provide non-sticky surface at the rotating cylinder of heating, then no matter be by release agent or other means, all can not need in coating, apply release agent or apply release agent to coatingsurface.
The polymer coating that uses in some embodiments of the present invention that wherein comprises above-mentioned at least polymkeric substance is produced with the form of aqueous composition usually.Proper ratio between these compositions is according to polymkeric substance composition, applying condition etc. and different, but do not have particular restriction, as long as the paper of the processing of producing can satisfy the quality that its intended purpose requires.In addition, polymer coating according to embodiments more of the present invention optionally comprises additive, such as dispersion agent, water-holding agent, thickening material, defoamer, sanitas, tinting material, water-resisting agent, wetting agent, siccative, initiator, softening agent, fluorescence dye, UV light absorber, release agent, lubricant and cationic polyelectrolyte.
According to specific embodiments of the present invention, processing substrate near paper machine central area such as applying glue pressing position place with polymer coating.In addition, can be used for applying polymer coating to the device of substrate in order to apply polymeric film on any one surface of the paper web that just is shaped with respect to the paper machine location.Can use the device more than to apply polymeric film on each side of the paper web that just is shaped.
These advantages allow to use the Paper or cardboard of slight calendering, have therefore kept rigidity, and good printing is provided simultaneously.
Substrate generally by be generally used for this classification fiber form, according to specific embodiments, comprise not the kraft pulp of bleaching or bleaching.Paper pulp can be comprised of hardwood or cork or their combination.The basic weight of cellulosic fibre layer can be approximately 30 to about 500gsm, more in particular is approximately 150 to about 350gsm.Substrate also can comprise organic and inorganic filling, sizing agent, retention agent and other auxiliary agent as known in the art.Final paper product can comprise one or more cellulosic fibre layers, polymer film, and according to some embodiments, also has other functional layer.
According to some embodiments, the invention provides printing or the packaging Paper or cardboard of the coating of a side or two sides, when measuring according to TAPPI paper and paper pulp test method No.5A, its Parker Print Surf smoothness value is lower than approximately 2-3 micron after coating and finishing (finish) process.
Paper or cardboard described herein also can be provided one or more other coatings.Can provide the top coat that comprises conventional component to improve some character of Paper or cardboard.The example of the conventional component of this class comprises pigment, tackiness agent, filler and other special additive.When existing, can apply top coat with the coated weight more much lower than conventional coating and similar printing is provided.Therefore, top coat weight can be approximately 4-9gsm, as single dope layer, or about 8-18gsm, as two dope layers.On the contrary, approximately 10-20gsm (as single dope layer) or 18-30gsm (as two dope layers) provide suitable surface properties to conventional White Board general requirement.Paper or cardboard also can be coated on the side with untreatment surface of sheet.
After providing instruction of the present disclosure, will illustrate by specific embodiment now, specific embodiment never should be regarded as limiting the scope of claim.
According to embodiments more of the present invention, can process thickness and be approximately 10 points, Parker PrintSurf (PPS) value for approximately 9 microns (utilize soft backing, 10kg pressure) and the Sheffield smoothness be about 310 substrate, the processing sheet that obtains having the smoothness of improvement and only have very little thickness to reduce.Can to substrate, provide approximately 5g/m by the PVOH solution that applies about 25% solids content 2Dried fraction of coverage is come treatment substrate.Then, to provide at least about 0.1 g/m 2The speed of dried borax fraction of coverage and solution solids content apply cross-linking agent solution.Make wet cross-linked polymer film can contact the polishing rotating cylinder of heat by extruding plate against drum surface.The drum surface temperature can be at least about 190 ℃.Coating can be dried and break away from drum surface.The duration of contact of polymeric film and rotating cylinder generally can be in the about scope of 0.5-2.0 between second.The sector-meeting of processing have approximately 9.6 and 10.0 between thickness, the about PPS value of 2.4-3.0, and the about Sheffield smoothness of 140-170.
In preferred embodiments, can use starch solution as the polymer materials in the polymer coating.
An aspect of the present disclosure relates to the Paper or cardboard manufacture method.According to a kind of embodiment of the present invention, method comprise apply the polymer coating that comprises the crosslinkable hydrogel to substrate, apply on the polymer coating of crosslinker solution to the substrate surface, be formed to whereby the crosslinked polymer film forming coating of small part and when polymer film forming coating still is in hygrometric state, make the surface of polymer film forming coating Contact Heating.The surface of heating can be the heat polishing rotating cylinder with smooth smooth finish.The temperature on the surface of heating generally approximately 150 ℃ to about 240 ℃ scope.Can use higher temperature, for example at the most approximately 300 ℃.According to some embodiments, the temperature on the surface of heating 180 ℃ to about 200 ℃ scope, and according to some embodiments, be at least about 190 ℃.
According to specific embodiments of the present invention, crosslinkable polymer can be selected from starch, waxy corn, protein, polyvinyl alcohol, casein, gelatin, soybean protein and alginate.According to certain aspects of the invention, but usage quantity is that the approximately 60wt% of dry substance is to the about crosslinkable polymer of 100wt%.
In some manifestation, linking agent can be borate or borate derivative such as borax, sodium tetraborate, boric acid, phenyl-boron dihydroxide or butyl boron dihydroxide.In crosslinkable polymer, but usage quantity is approximately 1% to about 12% linking agent.
The invention still further relates to the paper of the processing of producing according to method described herein.The density increase that the paper of processing is characterised in that the smoothness of raising and compares less with original sheet.
Since wish when the rotating cylinder of coating Contact Heating, to make it be in hygrometric state, therefore can be for example by adding water to the coating humidification.A kind of method be before coating contacts hot rotating cylinder spray water to coating.But, in some embodiments, can also be in the situation that operate without any additional humidification.
In some embodiments, can use starch as soluble polymer.In some embodiments, starch-based coating can be in the situation that there be linking agent successfully to move, and can obtain good result when not having gelling (be also referred to as and condense).
Make the starch solution rotating cylinder of Contact Heating under these conditions that comprises the 2-5% release agent.Under some conditions, if need to the coating humidification, then can make separately water as the well reproduced of spraying and generation glazed surface.If solids coatings is enough low, then just can operate without the water spray humidification.Be applied to the starch coating of 20% solids content on the paper web and the rotating cylinder of Contact Heating, obtain good reproduction.
Also can test the starch coating with 25% and 30% solids content.These two kinds of coating are without any adhesively breaking away from rotating cylinder, but do not have good surface-rendering.25% solids content coating obtains moderate and reproduces, but 30% solids content coating is not very level and smooth.As if the surface exists the water of some amount can help transmission to be boiled in the whole coating.Below the surface water of some amount, local surface area can still have enough boilings so that the well reproduced of drum surface to be provided, but other surface area can not.Therefore, without water spray humidification surface the time, when the solids content increase surpassed 20%, the per-cent that reproduces the area of level and smooth drum surface increased with solids coatings and reduces, until when about 30% solids coatings, almost can not obtain maybe can not obtain surface smoothness and reproduce.If enough water is sprayed on the surface at 30% solids content coating before the rotating cylinder of Contact Heating, then can obtain completely surface-rendering.We can expect that this relation is affected by raw material absorptivity, coating content, dope viscosity and process speed also.Should determine these effect of parameters by further experiment.
Utilize the chromium surface on the heated drums to move above-mentioned example.The example that operation the following describes after the drum surface of reforming with tungsten carbide coating.In each of these examples, carry out the several times " RUN " to collect data.Operation (run) is comprised of following: rotating cylinder is heated to about 190 ℃, set the sprinkling level, apply to be coated with by the gauge stick method and expect on the paper web, then randomly humidification sprays (it randomly comprises linking agent), and then makes paper web contact rotating cylinder with 35fpm.The rotating cylinder temperature of run duration changes between 180 ℃ and 190 ℃.Be in operation, reformed unique variable is the coating content that gauge stick applies.The different experiment change of carrying out coating type, solids coatings or sprinkling level in service on device.Coating content is measured with difference weight and the value reporting to parch.Utilize the linking agent in the coating self to move some experiments, for example when using not strong crosslinked material such as starch.
Embodiment 1
Using basic weight is 111 1b/3000ft 2The substrate of minimum extruding as the substrate that applies and process simple coating composition.The first coating is 95% dry weight CELVOL, 203 S polyvinyl alcohol (PVOH) and 5%Emtal 50 VCS, uses triglyceride level as release agent.Solids coatings is 20wt%.Apply coating by gauge stick.Table is the tabulation of sample and test conditions.By with comprise the 3wt% borax and as the crosslinker solution spray paint of the 1wt% sulfonated castor oil of release agent with preparation sample 1.1.Spray rate is 48 ml/min.Sample can copy well rotating cylinder and not break away from from rotating cylinder with having adhesion.Utilize minimum thickness loss to obtain the remarkable improvement of smoothness.For sample 1.2, condition is identical, except do not use borax in spray solution.Do not make polyvinyl alcohol crosslinked borax, coating can not break away from the surface, and part film still is retained on the drum surface.This experiment has clearly illustrated that and has made polyvinyl alcohol crosslinked benefit.
Table
Sample and test conditions
In service in another time, come the comparative polymers performance with carboxymethyl cellulose (CMC) replacing for polyvinyl alcohol.Carboxymethyl cellulose is FINFIXX 30, because dope viscosity, it can only be in 7% solids content work.With 95% polymkeric substance and 5%Emtal preparation coating.Sample 1.3 and 1.4 is two kinds of different coat weight utilizing borax spraying 48ml/min to spray.Coating has copied well drum surface and has broken away from rotating cylinder fully.Under the minimum thickness loss, improved smoothness, but smoothness is not as good with polyvinyl alcohol.For the operation that produces sample 1.5, in spraying, do not use borax.Coating has copied well drum surface and has broken away from rotating cylinder fully.Improved smoothness by removing borax.This shows that uncrosslinked coating is reproducible and break away from rotating cylinder, this means to use crosslinkable materials material in addition in this method.
Embodiment 2
Using basic weight is 111 lb/3000ft 2The substrate of inferior limit extruding as the substrate that applies thereon and process simple coating composition.The first coating is 95% dry weight CLEER-COTE, 625 starch (waxy corn starch of viscosity-modifying) and 5%Emtal 50 VCS, uses triglyceride level as release agent.Solids coatings is 20wt%.Apply coating by gauge stick.By with comprising the 3wt% borax and preparing sample 2.1 as the crosslinker solution spray paint of the 1wt% sulfonated castor oil of release agent.Spray rate is 46 ml/min.Sample copies well rotating cylinder and does not break away from from rotating cylinder with having adhesion.Under the thickness loss of minimum, obtain the remarkable improvement of smoothness.Utilize the different coat weight of identical coating to prepare sample 2.2,2.3,2.4 and 2.5, but spraying does not comprise borax.All samples copies well rotating cylinder and breaks away from from rotating cylinder fully.Carry out sample 2.6 and 2.7 without any spraying fully.Sample copies well rotating cylinder and breaks away from fully.The smoothness value is not very good, but sample still has the smoothness that significantly improves under minimum thickness reduces.This explanation present method can be worked under without any the humidification spraying.
Embodiment 3
This experiment is the continuation of embodiment 2, explores the impact of solids coatings.Under without any the humidification spraying, carry out sample 3.1 and 3.2 in 23% solids coatings.Obtain good copy and discharging.For sample 3.3 and 3.4, solids coatings is added to 25.7%, does not have equally humidification to spray to apply.Discharged fully, but obtained incomplete copying surface.Observe according to vision, the copying surface of the 90-95% that only has an appointment rotating cylinder.For sample 3.5 and 3.6, use this 25.7% identical solids content, and apply the humidification spraying of 48ml/min.Copying surface is complete, and has greatly improved the smoothness value.For sample 3.7 to 3.12, use the coating of 30% solids content.When not using humidification spraying (3.7), obtain to discharge fully, but only have the surface of little per-cent to be replicated.When using the humidification spraying (3.8) of 48ml/min, copy being greatly improved, but surface spottiness still has and copies poor zone.When humidification spraying is increased to 98ml/min (3.9,3.10,3.11 and 3.12), copy completely, and under reducing, the thickness of minimum greatly improved smoothness.Then, reduce solids coatings.In 17.5% solids coatings (3.13,3.14) and do not apply humidification when spraying, well broken away from and copied fully.In 10% solids content (3.15) and do not apply humidification when spraying, low dope viscosity causes the coat weight that reduces and the coating in sheet of increase to absorb, thereby poor copying occur.
Use starch to carry out top coating as polymer coating with the smooth product sample that 20% solids content prepares, apply conventional colored clay coating (approximately 2/3 clay and 1/3 carbonate at smooth polymer layer top, has emulsion adhesive, with about 101b/3000ft 2Single coating apply).Then these samples of section check the pattern of dope layer.Then make sample be cleaved into 2 half (freezing breaking) by freezing sample in liquid nitrogen and carry out section.Then examine under a microscope the limit of splitting (for example cross section) of sample.
There is the space in the Photomicrograph demonstration in the polymer coating layer, shown in Fig. 2 to 9, they comprise the measurement bar of indicating their scales.For Fig. 2-5, the Photomicrograph magnification is 1000, and measuring bar is 20 microns long.For example in Fig. 2, the structure of demonstration comprises paperboard substrates 110.Substrate thickness extends below the Photomicrograph zone usually.Because freezing disruption method, the substrate 110 that shows in the Photomicrograph are separated with polymer layer 120 sometimes or part is separated.Therefore, the frame of indication substrate enters the coboundary that distance only may roughly show substrate 110.
In these samples, polymer coating layer 120 is applied on the substrate 110, and against hot rotary drying, as previously described.Then apply top coating 130 and dry.Term " polymer " coating " then when wet, contact hot rotating cylinder for describing by the above-mentioned layer that applies here.Term " top coating " is used for describing outer, and it is applied in as a layer.Obviously, can apply more multi-layered " top coating " and can be and be different from those coating material used herein.
Space 121 is significantly in polymer coating layer 120, seen in Fig. 2-9.For example Fig. 2 has shown several spaces 121 in polymer coating layer 120, and the space looks that lateral dimension is about 5-20 micron.Suppose that they enter " entering " to breaking size in the sample in about same range as.The space generally looks and " flattens " a little on " vertically " direction, namely enters in the thickness of sample.As if the space also have relatively smooth and common thin " wall ".These thin walls between adjacent space, see seem the most obvious.In the place of space wall near top coating 130, its thickness may be difficult to see, but can be by infer its existence near the smooth profile of the top coating 130 in space.
Fig. 3 is for showing the exemplary Photomicrograph in some spaces 121 in the polymer coating layer.The space looks extends equaling coated surface area area over half.Polymer coating layer profile in this Photomicrograph is not too clear.
Fig. 4 is for showing the exemplary Photomicrograph in some spaces 121 in the polymer coating layer 120.The wall in space looks thinner, and this is by a little translucent appearance confirmation in the wall in 2 spaces.
For Fig. 5-9, magnifying power of microscope is 500, and measuring bar is 50 microns long.Fig. 5 has shown the some spaces 121 in the polymer layer 120, and each measures the size that bar shows selected space, for example, usually from left to right mobile, vertical demension measurement is 10.5 microns, and transverse distance is 36 microns, vertical range is 10.6 microns, and transverse distance is 36.3 microns.Equally, the space looks and extends equaling the only about half of area of coated surface area.
Fig. 6 has shown another sample with similar measurement bar, and for example, usually mobile from left to right, vertical demension measurement is 8.66 microns, and transverse distance is 32.1 microns, and vertical range is 11.8 microns, and transverse distance is 22.7 microns.Collect such as those observed values in Fig. 5 and 6 for the figure of hereinafter discussing at Figure 17.
Fig. 7 has shown the space 121 in the polymer layer 120, comprises usually flatten several of aspect of demonstration.The space looks extends at the area that equals near whole coated surface areas.Fig. 8 has shown another sample with similar widely distributed space 121.The wall zone in several spaces is visible.Fig. 9 has shown another sample, and wherein space 121 looks and extends at the area that equals near whole coated surface areas.
Use starch to be applied by the top as polymer coating other sample with the smooth product of 20% solids content generation.Cut the pattern that these samples check dope layer open.Then make sample be cleaved into 2 half (freezing breaking) by freezing sample in liquid nitrogen and carry out section.Then examine under a microscope the limit of splitting (for example cross section) of sample, shown in Figure 10-12, it comprises measures their yardstick of bar indication.Magnifying power of microscope is 1000, and measuring bar is 20 microns long.Figure 10 has shown polymer layer 120, and it comprises space 121 and very level and smooth outside surface is arranged.Polymer layer is positioned on the paperboard substrates 110, and has indicated a cellulosic fibre 112.Substrate thickness extends below the Photomicrograph zone usually.
Figure 11 and 12 has shown with polymer-coated but other Photomicrograph of the sample of top coating not.Equally, the smoothness of polymer layer 120 is that significantly following space 121 too.The wall in space is surperficial consistent with polymeric coating usually.
Figure 13 (at the 200x ratio of enlargement) and Figure 14 (at the 500x ratio of enlargement) have shown the surface of the sample of observing under scanning electron microscope.These samples do not give top coat 130.Larger rope-like constructed 112 is the cellulosic fibre of substrate 110.What occur as refined net or grid is each space in the polymer layer 120 than minicell shape structure 122.Here polymer layer looks substantially transparent, except the wall in space.
Figure 15 and 16 has shown the sample surfaces of observing under the back scattering scanning electron microscope.These samples do not give top coat 130.Larger rope-like constructed 112 is the cellulosic fibre of substrate 110.Is the wall in each space in the polymer layer 120 as refined net or grid appearance than minicell shape structure 122.Here polymer layer looks substantially transparent, except the wall in space.The space looks and is distributed in whole surface.
Figure 17 is for showing based on gap length (lateral dimension) and (vertical dimension in the Photomicrograph) figure of the distribution of the void size of about 90 observed values separately highly.Measurement demonstrates approximately 19 microns average gap length (measuring in the direction that is parallel to thickness of sample), and standard deviation is approximately 9 microns.Measurement demonstrates approximately 10 microns average space height (measuring to the direction of thickness of sample entering " entering "), and standard deviation is approximately 4 microns.
As if these void size represented the sample of this paper research.But they do not mean that restriction, may obtain other size because material or treatment condition change.
Suppose that vapor bubbles forms these spaces when coating contacts hot rotating cylinder, and bubble can be offered help and kept the power of coating contact rotating cylinder.The space that obtains generally helps the gap between the smooth surface of the bridge joint substrate layer 110 that (otherwise) is coarse in addition and hot rotating cylinder.Therefore dry polymer coating has smooth replicated surfaces, and it is more smooth than substrate layer 110.Seeming many or most of spaces still keeps complete when applying top coat 130.Therefore top coat is because following relatively smooth polymer layer 120 and finally more smooth.This is regarded as the advantage that the present invention obtains.Except the impact of space on the smooth replicated surfaces of help formation of hypothesis, the space also can help to reduce product density.
Condition between pressure roller 24 and the hot rotating cylinder 22 in the roll gap can affect whether form the space in polymer coating.According to the diameter of pressure roller hardness and pressure roller and hot rotating cylinder, the essential roll gap load (for example, the load of the PLI on the roll gap) of adjusting of possibility is so that the boiling in the realization roll gap is to form the space.
No matter need smooth substrates or the finished product in what situations, all can use the polymer-coated Paper or cardboard that forms by present method.But polymer-coated Paper or cardboard former state is used (for example shown in Figure 10-16), or can be used as the substrate use that will apply other coating or other handled thing (top coat 130 or other coating that for example, show among Fig. 2-9) on it.Additional ornamenting material or method can be applicable to polymer-coated Paper or cardboard, are with or without additional coating.For example, can apply one or more additional coatings, commonly the undercoat of conventional Paper or cardboard substrate, top coat and triple coating.Can before or after optional additional coating, use calendering technique.For example, can apply one or more additional coatings, then carry out gloss calendering step.
Should be able to be easily aware of according to manufacturing of the present invention the description and use the method for polymer-coated material from only having of materials and methods provided herein.Therefore, think and have no need for further discussion or illustrate this class material or method.
Although described and illustrated the preferred embodiments of the invention, apparent, only otherwise break away from the spirit or scope of the present invention, can make multiple change to embodiment of the present invention and enforcement.Although the preferred embodiment of this paper explanation is to describe in conjunction with the Paper or cardboard substrate, but can easily implement these embodiments according to the present invention in other structure, described structure includes but not limited to fabric, non-woven fabrics, filamentary material, poly(lactic acid) substrate and porous-film.
Therefore, it should be understood that the specific embodiments that the invention is not restricted to this paper open (or from open, obviously finding out), but only limited by appended claim.

Claims (53)

1. the product that obtains by processing substrate comprises:
Substrate; With
The first coating on described substrate,
Wherein said the first coating comprises water-soluble polymers and release agent, and
Wherein in described the first coating, form the space,
Wherein said the first coating comprises the surface, and at least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, described the first coatingsurface has the Sheffield smoothness less than 200 units, and wherein said water-soluble polymers comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
2. the product of claim 1, wherein said water-soluble polymers comprise at least a in casein and the soybean protein.
3. the product that obtains by processing substrate comprises:
Substrate; With
The first coating on described substrate,
Wherein said the first coating comprises that water-soluble polymers, release agent also do not have elastomer material substantially,
Wherein said the first coating comprises the surface,
Wherein said the first coatingsurface has the Sheffield smoothness less than 200 units, and
Wherein under the described surface of described the first coating, form the space, and at least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
4. the product that obtains by processing substrate comprises:
Substrate; With
The first coating on described substrate,
Wherein said the first coating comprises that water-soluble polymers does not also have elastomer material substantially, and
Wherein in described the first coating, form the space,
Wherein said the first coating comprises the surface, and at least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, described the first coatingsurface has the Sheffield smoothness less than 200 units, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
5. claim 1,3 or 4 product also are included in the second coating on described the first coating.
6. claim 1 or 4 product, wherein said the first coating comprises the surface that has less than the Sheffield smoothness of 150 units.
7. the product that obtains by processing substrate comprises:
Substrate; With
The first coating on described substrate,
Wherein said the first coating comprises the surface,
Wherein said the first coatingsurface has the Sheffield smoothness less than 200 units, and
Wherein under the described surface of described the first coating, form the space, and described the first coatingsurface at least 50% have lateral dimension and be space under at least 5 microns the surface,
Wherein said the first coating comprises at least 60% water-soluble polymers and 10% release agent at the most with dry weight basis, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
8. claim 1 or 7 product, wherein said the first coating does not comprise elastomer material substantially.
9. claim 1,3,4 or 7 product, wherein said the first coating comprises linking agent.
10. claim 1,3 or 4 product, wherein said the first coating comprises at least 60% water-soluble polymers and 10% release agent at the most with dry weight basis.
11. claim 3,4 or 7 product, wherein said the first coating comprise at least a in casein and the soybean protein.
12. the product of claim 3 or 7, wherein said surface have the Sheffield smoothness less than 150 units.
13. process the method for substrate, comprise step:
The first coating of aqueous solutions of polymers is applied on the described substrate as film; With
Fix described aqueous solutions of polymers by the surface that makes described aqueous solutions of polymers Contact Heating to cause described aqueous solutions of polymers boiling and to form the space that is retained in the described aqueous solutions of polymers,
Wherein said fixing step comprises the described aqueous solutions of polymers of at least part of drying, and described film comprises the surface, and at least 50% of described surface has lateral dimension and is space under at least 5 microns the surface, the described surface of described film has the Sheffield smoothness less than 200 units after drying, wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
14. contacting the surface of described heating, the method for claim 13, wherein said film be less than 3 seconds the timed interval.
15. contacting the surface of described heating, the method for claim 14, wherein said film be less than 2 seconds the timed interval.
16. contacting the surface of described heating, the method for claim 15, wherein said film be less than 0.5 second the timed interval.
17. the method for claim 13, wherein the described film of the aqueous solutions of polymers surface that contacts described heating is less than 3 seconds, and the surface of wherein said heating has and is higher than 150 ℃ temperature.
18. process the method for substrate, comprise step:
The first coating of aqueous solutions of polymers is applied on the described substrate as film,
Wherein said the first coating comprises water-soluble polymers and release agent,
Be less than 3 seconds in order to cause the boiling of described aqueous solutions of polymers and in described film, form the space and fix described film by the heating surface that makes described film Contact Temperature be higher than 150 ℃,
Wherein said fixing step comprises the described film of at least part of drying, wherein
At least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, and described the first coatingsurface has the Sheffield smoothness less than 200 units, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
19. process the method for substrate, comprise step:
The first coating of aqueous solutions of polymers is applied on the described substrate as film,
Wherein said the first coating comprises that water-soluble polymers does not also have elastomer material substantially,
Be less than 3 seconds in order to cause the boiling of described aqueous solutions of polymers and in described film, form the space and fix described film by the heating surface that makes described film Contact Temperature be higher than 150 ℃,
Wherein said fixing step comprises the described film of at least part of drying, wherein
At least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, and described the first coatingsurface has the Sheffield smoothness less than 200 units, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
20. claim 13,18 or 19 method, wherein linking agent is included in described the first coating before described film contacts described heating surface or is applied to described the first coating.
21. process the method for substrate, comprise step:
The first coating of aqueous solutions of polymers is applied on the described substrate as film,
Be less than 3 seconds in order to cause the boiling of described aqueous solutions of polymers and in described film, form the space and fix described film by the heating surface that makes described film Contact Temperature be higher than 150 ℃,
Wherein said fixing step comprises the described film of at least part of drying,
Wherein said the first coating comprises the surface,
Wherein dried described the first coatingsurface has the Sheffield smoothness less than 200 units,
At least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
22. claim 13,18,19 or 21 method, the surface that wherein said film contacts described heating is less than 2 seconds time.
23. contacting the surface of described heating, the method for claim 22, wherein said film be less than 0.5 second time.
24. claim 13,18,19 or 21 method, wherein said substrate comprises the width of cloth or sheet.
25. claim 13,18,19 or 21 method, wherein said substrate comprises Mierocrystalline cellulose.
26. claim 13,18,19 or 21 method, wherein said substrate comprise at least a in paper, cardboard, filamentary material, porous material or the poly(lactic acid).
27. the method for claim 26, wherein said substrate comprise at least a in fabric or the porous-film.
28. claim 13,18,19 or 21 method, wherein said aqueous solutions of polymers comprises crosslinkable polymer.
29. claim 13,18,19 or 21 method, wherein said aqueous solutions of polymers does not comprise elastomer material substantially.
30. claim 13,18,19 or 21 method, wherein linking agent is included in described the first coating before described film contacts described heating surface or is applied to described the first coating; Wherein said linking agent comprises at least a in borate, aldehyde, ammonium salt and the calcium cpd.
31. the method for claim 30, wherein said linking agent comprises borax.
32. claim 13,18,19 or 21 method, wherein said the first coating comprises at least 60% water-soluble polymers and 10% release agent at the most with dry weight basis; Wherein said release agent comprises at least a in wax, fatty acid metal soap, fatty ester, fatty amide, aliphatic amide, lipid acid, Fatty Alcohol(C12-C14 and C12-C18), polymkeric substance, fluorinated compound and its combination.
33. the method for claim 32, wherein said release agent comprise at least a in petroleum wax, vegetable wax, animal wax, synthetic wax, metallic stearate, polyolefine, silicone polymer, fluoropolymer, natural polymer, fluoride fat acid and its combination.
34. claim 13,18,19 or 21 method, wherein said the first coating comprise at least a in casein and the soybean protein.
35. claim 13,18,19 or 21 method, wherein said the first coatingsurface has the Sheffield smoothness less than 150 units.
36. claim 13,18,19 or 21 method, described method also is included in the step of after-applied the second coating of the described film of at least part of drying, and wherein said the second coating comprises at least a in pigment, tackiness agent and the filler.
37. process the method for substrate, comprise step:
The first coating of aqueous solutions of polymers is applied on the described substrate as film,
Wherein said the first coating comprises that water-soluble polymers, release agent also do not contain elastomer material substantially,
Be less than 3 seconds in order to cause the boiling of described aqueous solutions of polymers and in described film, form the space and fix described film by the heating surface that makes described film Contact Temperature be higher than 150 ℃,
Wherein said fixing step comprises the described film of at least part of drying,
Wherein said the first coating comprises the surface,
Wherein dried described the first coatingsurface has the Sheffield smoothness less than 200 units,
At least 50% of described the first coatingsurface has lateral dimension and is space under at least 5 microns the surface, and wherein said the first coating comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
38. the method for claim 37, wherein said film contacts the time that described heating surface is less than 2 seconds.
39. the method for claim 38, wherein said film contacts the time that described heating surface is less than 0.5 second.
40. the method for claim 37, wherein said substrate comprises the width of cloth or sheet.
41. the method for claim 37, wherein said substrate comprises Mierocrystalline cellulose.
42. the method for claim 37, wherein said substrate comprise at least a in paper, cardboard, filamentary material, porous material or the poly(lactic acid).
43. the method for claim 42, wherein said substrate comprise at least a in fabric or the porous-film.
44. claim 18,19 or 37 method, wherein said water-soluble polymers comprises crosslinkable polymer.
45. the method for claim 37, wherein linking agent is included in described the first coating before described film contacts described heating surface or is applied to described the first coating; Wherein said linking agent comprises at least a in borate, aldehyde, ammonium salt and the calcium cpd.
46. the method for claim 45, wherein said linking agent comprises borax.
47. the method for claim 37, wherein said the first coating comprises at least 60% water-soluble polymers and 10% release agent at the most with dry weight basis, and release agent comprises at least a in wax, fatty acid metal soap, fatty ester, fatty amide, aliphatic amide, lipid acid, Fatty Alcohol(C12-C14 and C12-C18), polymkeric substance, fluorinated compound and its combination.
48. the method for claim 47, wherein said release agent comprise at least a in petroleum wax, vegetable wax, animal wax, synthetic wax, metallic stearate, polyolefine, silicone polymer, fluoropolymer, natural polymer, fluoride fat acid and its combination.
49. the method for claim 37, wherein said the first coating comprise at least a in casein and the soybean protein.
50. the method for claim 37, wherein said the first coatingsurface has the Sheffield smoothness less than 150 units.
51. the method for claim 37, described method also are included in the step of after-applied the second coating of the described film of at least part of drying, wherein said the second coating comprises at least a in pigment, tackiness agent and the filler.
52. process the method for substrate, comprise step:
The Mierocrystalline cellulose substrate is provided;
Apply the aqueous solutions of polymers film to described substrate,
Wherein said aqueous solutions of polymers comprises at the most 10% release agent of the water-soluble polymers of dry weight at least 60% and dry weight,
Be less than 3 seconds in order to cause the boiling of described aqueous solutions of polymers and in described aqueous solutions of polymers, form the space and fix described aqueous solutions of polymers by the heating surface that makes described aqueous solutions of polymers Contact Temperature be higher than 150 ℃,
Wherein said fixing step comprises the described aqueous solutions of polymers of at least part of drying, and described film comprises the surface, and at least 50% of described surface has lateral dimension and is space under at least 5 microns the surface, the described surface of described film has the Sheffield smoothness less than 200 units after drying, wherein said water-soluble polymers comprises at least a in starch, waxy corn, protein, polyvinyl alcohol, gelatin and the alginate.
53. claim 13,18,19,21,37 or 52 method also are included in the step of after-applied the second coating of the described film of at least part of drying.
CN200780006404XA 2006-02-23 2007-02-22 Method for treating a substrate Expired - Fee Related CN101389727B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US77611406P 2006-02-23 2006-02-23
US60/776,114 2006-02-23
PCT/US2007/004742 WO2007100667A2 (en) 2006-02-23 2007-02-22 Method for treating a substrate

Publications (2)

Publication Number Publication Date
CN101389727A CN101389727A (en) 2009-03-18
CN101389727B true CN101389727B (en) 2013-02-06

Family

ID=38459573

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200780006404XA Expired - Fee Related CN101389727B (en) 2006-02-23 2007-02-22 Method for treating a substrate

Country Status (11)

Country Link
US (1) US20070295466A1 (en)
EP (1) EP1987110A4 (en)
JP (1) JP5254809B2 (en)
KR (1) KR101023587B1 (en)
CN (1) CN101389727B (en)
BR (1) BRPI0707823A2 (en)
CA (1) CA2643891C (en)
MY (1) MY150737A (en)
NO (1) NO20083241L (en)
RU (1) RU2436882C2 (en)
WO (1) WO2007100667A2 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5300179B2 (en) * 2006-05-02 2013-09-25 大王製紙株式会社 Production equipment and production method for coated paper
US20100062232A1 (en) * 2006-12-15 2010-03-11 Drexel University Multilayer films
DE102008000283A1 (en) 2008-02-12 2009-08-13 Voith Patent Gmbh Combined application and smoothing process
DE102008000282A1 (en) 2008-02-12 2009-08-13 Voith Patent Gmbh Method and device for applying and drying a medium
PL2274484T3 (en) * 2008-03-20 2013-04-30 Loparex Llc Paper substrates useful as universal release liners
US7749583B2 (en) 2008-05-28 2010-07-06 Meadwestvaco Corporation Low density paperboard
CA2751653C (en) * 2009-02-10 2017-08-29 Meadwestvaco Corporation Low density paper and paperboard with two-sided coating
WO2010123689A1 (en) * 2009-04-21 2010-10-28 Meadwestvaco Corporation A method of making multilayer paper-based packaging materials having enhanced barrier performance
JP2012162411A (en) * 2011-02-03 2012-08-30 Shinshu Univ Method of producing sheet-like carbon nanostructure
JP5777913B2 (en) * 2011-03-24 2015-09-09 日東電工株式会社 Method for producing release liner
RS62432B1 (en) 2011-06-10 2021-11-30 Mayr Melnhof Karton Ag Method for producing a coated packaging material and packaging material with at least one barrier layer for hydrophobic connections
CN102618192B (en) * 2012-03-26 2013-10-16 珠海市联合托普粘合剂有限公司 High-waterproof nano modified water-based environment-friendly labeled binder easy in alkaline cleaning and preparation method thereof
FR3024468B1 (en) * 2014-07-30 2019-05-17 Munksjö Oyj METHOD FOR MANUFACTURING THERMOSCELLANT BARRIER PAPER
FR3024467B1 (en) * 2014-07-30 2019-05-17 Munksjö Oyj THERMOSCELLANT BARRIER PAPER
US10112209B2 (en) 2015-12-11 2018-10-30 VITRO S.A.B. de C.V. Glass drawdown coating system
EP3580057B1 (en) * 2017-02-13 2024-01-10 Wilsonart LLC Method of making a decorative laminate with core layer subjected to sodium alginate treatment
CN106847546B (en) * 2017-04-05 2019-01-18 苏州海凌达电子科技有限公司 A kind of preparation method of porous vanadic anhydride super capacitor material
CN110607710B (en) * 2018-06-15 2022-01-25 金光纸业(中国)投资有限公司 Single-coated paper with low crimpness and preparation method thereof
US20220009684A1 (en) * 2018-11-27 2022-01-13 Billerudkorsnas Ab Enhanced pvoh-based barrier layer composition, barrier layer and methods for its manufacture
CN113874580A (en) * 2019-04-16 2021-12-31 绿色科技全球私人有限公司 Method for modifying polymer barrier film
CN115279961A (en) * 2020-03-30 2022-11-01 科德宝高性能材料集团 Bituminous films with biodegradable binders

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1347926A (en) * 2000-10-12 2002-05-08 罗姆和哈斯公司 Forming method of polymer hydro-dispersing liquid

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480455A (en) * 1966-03-02 1969-11-25 Blandin Paper Co Paper coating composition
GB1271281A (en) 1968-07-31 1972-04-19 Ethyl Corp Coating of webs by freeze-drying and products therefrom
US3637431A (en) * 1968-09-30 1972-01-25 Little Inc A Coating composition and article coated with same
US3672922A (en) * 1970-01-26 1972-06-27 Penick & Ford Ltd Benzyl starch emulsion coating compositions
DE3268978D1 (en) * 1981-10-05 1986-03-20 Kuraray Co Paper coating agent
EP0218956A1 (en) * 1985-09-24 1987-04-22 Asahi Glass Company Ltd. Recording sheet
US5631076A (en) 1995-02-24 1997-05-20 New Oji Paper Co., Ltd. Hot melt ink thermal transfer recording sheet
US5690527A (en) * 1995-03-22 1997-11-25 Macmillan Bloedel Packaging Inc. Coated fibrous substrate with enhanced printability
JP3508307B2 (en) * 1995-07-19 2004-03-22 王子製紙株式会社 Manufacturing method of cast coated paper
AU2697899A (en) * 1998-05-18 1999-11-25 Rohm And Haas Company Hollow sphere organic pigment for paper or paper coatings
JPH11334199A (en) * 1998-05-26 1999-12-07 Mitsubishi Paper Mills Ltd Ink jet recording sheet
US6332953B1 (en) * 1998-10-02 2001-12-25 International Paper Company Paper product having enhanced printing properties and related method of manufacture
JP4663144B2 (en) * 2001-02-06 2011-03-30 日本製紙株式会社 Cast coated paper and method for producing the same
US7074495B2 (en) * 2002-04-11 2006-07-11 Fuji Photo Film Co., Ltd. Recording material support, process for manufacturing the same, recording material and process for image formation
JP2004249642A (en) * 2003-02-21 2004-09-09 Nippon Synthetic Chem Ind Co Ltd:The Coating agent composition for inkjet recording sheet and inkjet recording sheet
US6991706B2 (en) * 2003-09-02 2006-01-31 Kimberly-Clark Worldwide, Inc. Clothlike pattern densified web
JP2005125522A (en) * 2003-10-21 2005-05-19 Oji Paper Co Ltd Porous sheet and its manufacturing method
JP2006001028A (en) * 2004-06-15 2006-01-05 Oji Paper Co Ltd Inkjet recording body
US20060057358A1 (en) * 2004-09-10 2006-03-16 Fuji Photo Film Co., Ltd. Electrophotographic image-receiving sheet and image-forming method using the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1347926A (en) * 2000-10-12 2002-05-08 罗姆和哈斯公司 Forming method of polymer hydro-dispersing liquid

Also Published As

Publication number Publication date
WO2007100667A2 (en) 2007-09-07
NO20083241L (en) 2008-10-14
RU2436882C2 (en) 2011-12-20
EP1987110A4 (en) 2009-11-11
JP5254809B2 (en) 2013-08-07
BRPI0707823A2 (en) 2011-05-10
KR101023587B1 (en) 2011-03-21
MY150737A (en) 2014-02-28
JP2009527659A (en) 2009-07-30
CA2643891C (en) 2014-01-21
KR20080087168A (en) 2008-09-30
US20070295466A1 (en) 2007-12-27
CA2643891A1 (en) 2007-09-07
CN101389727A (en) 2009-03-18
WO2007100667A3 (en) 2007-12-13
RU2009104458A (en) 2010-08-20
EP1987110A2 (en) 2008-11-05

Similar Documents

Publication Publication Date Title
CN101389727B (en) Method for treating a substrate
CN102046881B (en) Low density paperboard
CN101438005B (en) Paperboard material with expanded polymeric microspheres
US8673398B2 (en) Method for treating a substrate
US8709555B2 (en) Media used in digital high speed inkjet web press printing
JP5682460B2 (en) Method for producing coated paper for printing
JP2014040699A (en) Paper and paper-making method
WO2007084806A2 (en) Method of producing coated paper with reduced gloss mottle
EP1937895A1 (en) A photobase material
US5690527A (en) Coated fibrous substrate with enhanced printability
CN101827974B (en) The method of process base material
WO2008103154A1 (en) Method for treating a substrate
Schmidt‐Thümmes et al. Applications in the paper industry
EP1702109A2 (en) Chemical improvement in paper making
JP2005264341A (en) Coated paper

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130206