CN1705797A - Papers comprising a boron-containing compound and a method of making same - Google Patents

Papers comprising a boron-containing compound and a method of making same Download PDF

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Publication number
CN1705797A
CN1705797A CN03825229.5A CN03825229A CN1705797A CN 1705797 A CN1705797 A CN 1705797A CN 03825229 A CN03825229 A CN 03825229A CN 1705797 A CN1705797 A CN 1705797A
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CN
China
Prior art keywords
starch
paper
boron
containing compound
cardboard
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.)
Pending
Application number
CN03825229.5A
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Chinese (zh)
Inventor
黄衍初
M·B·莱恩
K·M·辛
洪耀良
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Nevamar Corp
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Nevamar Corp
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Publication date
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Publication of CN1705797A publication Critical patent/CN1705797A/en
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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/12—Organo-metallic compounds
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents

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  • Paper (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Saccharide Compounds (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

The invention involves papers having either an internal starch or a size press applied starch and a boron-containing compound which is added in proportion to the starch and which is believed to interact with the starch to provide improved physical and mechanical properties in the paper. Method of forming the papers are also disclosed.

Description

The paper and the production method thereof that contain boron-containing compound
Invention field
The present invention relates to paper and paperboard products field, particularly relate to paper and paperboard products with improved dimensional stability.Another aspect of the present invention relates to the method for a kind of production paper of the present invention and paperboard products.
Background of invention
Lasting problem in field of papermaking is that paper expands or tendencies toward shrinkage in the size based on environmental damp condition.In high humidity environment, the paper fiber generally absorbs moisture and expands.Along with the expansion of fiber, the size of whole paper is also extended, and this phenomenon is called moisture expantion.On the other hand, when paper is exposed to especially dry following time of environmental condition, the moisture that keeps before the paper fiber can discharge causes fiber and paper to shrink.In addition, the variation of damp condition can cause the instability of other variation and paper size, comprises and curling with wrinkling.
In addition, being exposed to the intensity and the stiffness properties that can cause paper under the high humidity level descends.This has problems especially at the thick and heavy cardboard that is used for packing, and wherein needs to keep high strength and deflection.
So, need be to environmental condition sensitiveness paper less, that expansion or tendencies toward shrinkage are not arranged because of the local humidity condition.
Summary of the invention
Consider above-mentioned and other purpose and advantage, the invention provides a kind of method that forms paper or cardboard.This method comprises provides the papermaking that contains cellulose fibre, starch and boron-containing compound batching.The amount of starch compound can change in wide region, for example be equal to or less than about 200lbs/ ton fiber, preferably be equal to or less than about 170lbs/ ton fiber, the about 150lbs/ ton of 2-fiber more preferably from about, the about 100lbs/ ton of 2-fiber most preferably from about, wherein preferred amount is the about 50lbs starch/ton of an about 3-fiber in the embodiment of selecting.The amount of boron-containing compound also can change in wide region.In preferred embodiments, the amount of boron-containing compound will depend on the amount of starch.In these preferred embodiments, the amount of this compound is to be equal to or less than the about 7 weight % that add the starch in the batching, preferably be equal to or less than the about 5 weight % that add the starch in the batching, more preferably be equal to or less than the about 3 weight % that add the starch in the batching, preferably add the about 2 weight % of about 0.2-of the starch in the batching.In the embodiment of selecting, the amount of starch is the about 0.8 weight % of about 0.7-that adds the starch in the batching.This method also comprises from papermaking batching formation fibrous web and dry this paper web.In preferred embodiment of the present invention, dry paper web by press polish so that finished paper or cardboard to be provided.
On the other hand, the present invention relates to the paper or the cardboard that form by the inventive method.This paper or cardboard comprise the paper web that forms from the intermittent pulp proportioning that contains cellulose fibre, starch and boron-containing compound.In one embodiment, the major part of starch and boron-containing compound (for example greater than 50%, be preferably greater than 75% and more preferably greater than about 80% to about 90%) be in paper web the surface or near paper surface.In another embodiment, the major part of starch and boron-containing compound (for example greater than 50%, be preferably greater than 75% and more preferably greater than about 80% to about 90%) be dispersed in this whole paper web.
In the process that forms paper or cardboard, preferably starch and at least a portion boron-containing compound with boiling is pre-mixed each other so that slurries to be provided, and the slurries of gained join in the intermittent pulp proportioning then.In specific embodiment, further preferably unconverted starch and at least a portion boron-containing compound are pre-mixed each other so that slurries to be provided, the slurries of gained boiling then join slurries in the intermittent pulp proportioning then so that starch is transformed.But in other embodiment of specific the present invention, preferably boron-containing compound directly is added in the intermittent pulp proportioning.
Also having aspect another, the invention provides a kind of method that forms paper or cardboard, may further comprise the steps: the papermaking that contains cellulose fibre batching is provided, form fibrous web from this papermaking batching, dry this paper web, with with this paper web gluing, wherein said slurries contain starch solids and boron-containing compound by applying slurries to this paper web.The amount of boron-containing compound also can change in wide region.In preferred embodiments, the amount of boron-containing compound will depend on the amount of starch.In these embodiment preferred, the amount of this compound is to be equal to or less than the about 7 weight % that add the starch in the batching, preferably be equal to or less than the about 5 weight % that add the starch in the batching, more preferably be equal to or less than the about 3 weight % that add the starch in the batching, preferably add the about 2 weight % of about 0.2-of the starch in the batching.In the embodiment of selecting, the amount of starch is the about 0.8 weight % of about 0.7-that adds the starch in the batching.In preferred embodiment of the present invention, dry paper web is by paper or the cardboard of press polish so that finished product to be provided.
Again aspect another, the present invention relates to the paper or the cardboard that form by the inventive method.This paper or cardboard comprise the paper web that forms from the intermittent pulp proportioning that contains cellulose fibre and have sizing material on the paint paper web, and this sizing material comprises starch solids and the boron-containing compound that exists with above-mentioned amount.
Useful boron-containing compound for example is boric acid and metal borate.Boron-containing compound preferred for the present invention can be selected from boric acid, borax and Firebrake ZB.
Being used for starch of the present invention can be anionic starch, cationic starch or amphipathic, and this depends on specific embodiment.Preferred starch source can be selected from cornstarch, wheaten starch, potato starch, rice starch, tapioca and sago starch.
Detailed description of the present invention
The paper of the boron-containing compound that the present invention relates to have starch that internal starch or size press apply and add in proportion with respect to starch thinks that wherein boron-containing compound and starch interaction take place so that the improvement physical and mechanical property of paper to be provided.(here paper and cardboard are represented and comprised to " paper " of Shi Yonging, except as otherwise noted).
Paper provides as paper web, contains cellulosic pulp fibers, for example from broad leaf tree, coniferous tree or broad leaf tree and the coniferous tree fiber in conjunction with use the papermaking batching that obtain, by any known suitable boiling, defibrination and bleaching operation preparation.In preferred embodiments, the cellulose fibre in paper comprises the cork fibrous of the about 40 weight % dry weights of about 0-and the hardwood fiber of the about 60 weight % dry weights of about 100-.In specific embodiment, at least a portion fiber can provide from the herbaceous plant of non-timbers, including, but not limited to mestha, hemp, jute, flax, sisal hemp or abaca, although legal restrictions and other consideration may not allow to use hemp and other fiber source.Paper also can comprise other conventional additives, for example starch, mineral filler, cementing agent, retention agent and enhancing polymer.Operable filler is organic and inorganic pigment, polymer beads for example, for example polystyrene latex and polymethyl methacrylate, and mineral, for example calcium carbonate, kaolin and talcum.In some cases, paper also can comprise hollow microsphere.
Various paper and cardboard can be by the invention provides, and have various Substances and form from variety of cellulosic fibers.These are including, but not limited to paper in the office, tabulating paper, envelope paper, label paper, glossy paper and printing and publication paper, and the cardboard and the liner board of bleaching.
Paper in the office formed according to the present invention preferably has final thickness and anyly pinches pressure (nipping) or squeezing for example can be in conjunction with the coating of subsequently about 10 mils of about 3.5-behind letterweight light.Paper in the office of the present invention also preferably shows about 18lb/1300ft 2-Yue 32lb/1300ft 2Substance.Bleached paperboard formed according to the present invention preferably has final thickness after the cardboard press polish and any pinching pressed or squeezing for example can be in conjunction with the coating of subsequently about at the most 45 mils.Bleached paperboard of the present invention also typically shows about 40lb/1000ft 2-Yue 90lb/1000ft 2Substance.
Liner board formed according to the present invention preferably has final thickness after the cardboard press polish and any pinching pressed or squeezing for example can be in conjunction with the coating of subsequently about at the most 45 mils.Liner board of the present invention also preferably shows about 25lb/1000ft 2-Yue 100lb/1000ft 2Substance.
Importantly, paper bag of the present invention is drawn together boron-containing compound and starch.Boron-containing compound is preferably selected from boric acid and anhydrous and metal borate hydration.Particularly preferred boron-containing compound comprises anhydrous and Boratex (borax), potassium borate, boron oxide, boric acid and Firebrake ZB hydration.Boron-containing compound is according to adding with the proportional amount of adding starch, and this amount can change in wide region.In preferred embodiments, the amount of boron-containing compound will depend on the amount of starch.In these embodiment preferred, the amount of this compound is to be equal to or less than the about 7 weight % that add the starch in the batching, preferably be equal to or less than the about 5 weight % that add the starch in the batching, more preferably be equal to or less than the about 3 weight % that add the starch in the batching, preferably add the about 2 weight % of about 0.2-of the starch in the batching.In the embodiment of selecting, the amount of starch is the about 0.8 weight % of about 0.7-that adds the starch in the batching.
Starch solution is added in the paper with boron-containing compound.Starch solution can comprise the combination of cationic starch, anionic starch, amphiphilic starch and one or more these starch.Suitable starch source comprises cornstarch, wheaten starch, potato starch, rice starch, tapioca and sago starch.The kind and the amount that join the starch in the paper can particular according to the present invention change, and will describe in detail below.
Adding starch and boron-containing compound can particular according to the present invention change in paper.In one embodiment of the invention, starch and boron-containing compound added in the batching form paper web on paper machine before.In another embodiment, being combined in of starch and boron-containing compound forms paper web and adds in the gluing press to the small part drying.Observe paper according to the present invention and had improved anti-hygro-expansivity and anti-shrinkage.That is to say that these paper show still less filament expansion than conventional paper in being in moisture or wet environment the time, and in dry especially environment, also show filament contraction still less.In some embodiments of the present invention, these paper show intensity and stiffness properties, comprise Gurley deflection, elastic modelling quantity, anti-improvement of opening energy absorption and/or tensile strength.
The method that forms paper material of the present invention comprises the paper batching that provides initial.The cellulose fiber ingredients of this batching, suitable is chemical method paper pulp, Piao Bai kraft pulp (although not thinking that the present invention is limited to kraft pulp) for example, with can use and obtain good effect with other chemical pulp, sulfite pulp, mechanical pulp groundwood pulp for example for example, with other kind paper pulp, and their mixture, for example chemical-mechanical and heat-mechanical pulp.
Though be not crucial for the present invention, but paper pulp is preferably handled according to one or more bleachings well known in the art and is bleached to remove lignin and to reach needed brightness of pulp, for example comprise bleaching schedule based on elemental chlorine, bleaching schedule based on chlorine dioxide, not chloride bleaching schedule, the bleaching schedule that does not contain elemental chlorine, and any each the above-mentioned stage and the combination or the variation in other bleaching relative program stage.
After finishing bleaching and washing and screening slurry, carry out one or more defibrination steps usually.Then, refining slurry feeds blending chest, there with common introducing papermaking batching in various additives and filler and for example unbleached slurry of other slurry and/or recycling or waste slurry mix.Additive can comprise so-called " plasm-glue-blending " agent, is mainly used in the contact angle that improves polar liquid contact paper surface, for example is alkenyl succinic anhydrides (ASA), alkyl ketene dimer (AKD) and gum rosin.Retention agent also can add in this stage, comprises CATION and anionic retention aids.
Starch also joins in the paper batching usually at this moment in an amount of slurry.In one embodiment of the invention, boron-containing compound joins in the batching with starch.In this embodiment, usually starch is added in the batching with aforesaid amount, for example about 3lbs starch/ton paper is to about 30lbs starch/ton paper.Boron-containing compound is also usually according to joining in the batching based on the amount that joins the above-mentioned amount starch in the batching.
In this embodiment, preferred boron-containing compound has higher water solubility.Preferably will transform (boiling) starch solution and boron-containing compound and be pre-mixed each other, thereby the slurry of starch and boron-containing compound will be provided, then this slurry mix be joined in the batching in later step.
In this embodiment, preferred boron-containing compound is a boric acid.The starch that also preferably is added in the batching is cationic starch.The present invention can use in advance the starch that transforms, just, starch in advance with additive for example ammonium persulfate and/or invertase reaction highly branched raw starch molecular structure is partially converted to the more straight chains and the structure of branching still less.But if starch does not transform in advance, then it can carry out and boron-containing compound boiling and conversion under about 95-100 ℃ temperature in slurry, is cooled to about 40-60 ℃ before then in joining batching.
In another embodiment of the invention, boron-containing compound can directly join in the ingredients mixture, and in addition, starch solution can directly join in the batching.If it for example is Firebrake ZB that boron-containing compound has lower water solubility, then this is preferred.
After the preparation, batching is for example formed the single or multiple lift paper web on Fourdrinier machine or any other the suitable known in this field and paper machine that may know in the future at paper machine.The basic methodology that papermaking relates on the paper machine of various structures is well known to a person skilled in the art, therefore here is not described in detail.Usually, be ejected into the mobile forming board of circulation of porous or on the net by the aqueous slurry (about usually 0.1-about 1.0%) of the paper pulp fiber that contains low denseness and the microballoon and the batching formed of various additive and the filler case before the paper web that are dispersed in wherein, there this liquid gradually the aperture from net leak to do, up to the felt that forms paper pulp fiber and other material on the net.Still Shi felt or paper web are transferred on the wet press from line, occur more fiber-consolidated fibers there, and moisture further reduces.This paper web is passed into the initial drying machine stage then to remove most of moisture that do not keep and the fiber in the further fixed paper web.After initial drying, this paper web can further use the gluing press to handle, and extra there starch, pigment and other additive can be coated on the paper web and by the squeezing effect and introduce.
In another embodiment of the invention, except boron-containing compound with the wet end internal starch adds or replace this adding, boron-containing compound can also join in the paper with this starch.In this embodiment, starch adds on the gluing press according to needed amount usually, for example the starch pick up is the about 150lbs starch/ton of an about 40-paper, boron-containing compound adds on the gluing press according to needed amount with starch usually, based on the weight meter of the starch solids that adds, for example be the about 0.1 weight % of about 0.2-(the about 0.8 weight % of preferably about 0.7-) of starch.
In this embodiment, preferably starch and boron-containing compound are sneaked into slurry in advance.In addition,, then can preferably raw starch be mixed with boron-containing compound if this starch is for example pearl starch of original unconverted starch, then with the slurries boiling of gained with converted starch before applying on the gluing press.Conversion can be used additive, and for example ammonium persulfate and invertase assist to carry out.Conversion can be carried out under about 100-105 ℃ temperature.After transforming, starch is maintained at about 60-70 ℃ then, up to it is coated on the gluing press.For the coating on the gluing press, preferred boron-containing compound is borax (Boratex).
After processing and the subsequent drying, paper preferably carries out press polish to reach needed final above-mentioned thickness, with slickness and other performance of improving paper web in the gluing press.Press polish can be by carrying out steel-steel press polish under the nip pressure of desired thickness and finish being enough to provide.The final thickness that should be appreciated that paper always mainly decides by the selection of nip pressure.
As mentioned above, the paper of observing gained has improved anti-hygro-expansivity and other illeffects of high humidity environment is for example curled and wrinkling repellence.Be not limited to any theory, think that the introducing of boron-containing compound has reached this effect by promoting the complex that forms between starch molecule and the boron-containing compound.Think this engagement limits starch penetrate in the cellulose fibre.
Thinking that starch solids penetrates can provide moisture penetration to go into path in the fiber in the cellulose fibre.Therefore, the interpolation of starch makes paper be easier to take place moisture expantion and other dimensional instability usually under high humidity environment.But by promoting starch molecule cooperation each other, the amount that can penetrate the starch of cellulose fibre reduces.Therefore, fiber not too is easy to by moisture penetration, and shows less change in size when changing environmental condition.
Surprised is, also observes in some embodiments, and the use of boron-containing compound causes the intensity of paper formed according to the present invention and stiffness properties to be improved.These paper show that also Gurley deflection, elastic modelling quantity, anti-opening can absorb and/or the improvement of tensile strength.
Following indefiniteness embodiment will illustrate each others of the present invention.Except as otherwise noted, temperature is ℃, and percentage is by weight, and the percentage of any pulp additive or moisture is all based on the oven-dry weight of paper pulp.
Example I
The hand-made paper sample of producing a series of liner boards is to measure the effect of adding boron-containing compound and starch in intermittent pulp proportioning.This cardboard is the pulp mixture formation from about 80% hardwood and about 20% cork.First (contrast) sample is to form under the situation without any internal starch or boron-containing compound.
Sample 2 is to form from identical batching, just the ratio of starch with about 20lbs starch/ton of pulp fibers is added in the ingredients mixture before batching forms hand-made paper.In addition, in this batching, do not comprise boron-containing compound.
In sample 3, use this pulp mixture and in this sample, this batching and about 20lbs starch/ton of pulp fibers and mix based on about 1% boric acid of the starch weight meter of adding.Starch and the boric acid formation slurries that are mixed with each other earlier.These slurries joined in the batching before forming hand-made paper then through boiling.
In sample 4, Firebrake ZB joins in the pulp mixture with the ratio of about 20lbs Firebrake ZB/ton paper pulp fiber.In pulp mixture, do not add internal starch.
In sample 5, the starch/ton of pulp fibers of about 20lb and about 20lb Firebrake ZB/ton paper pulp fiber join in the batching.In starch, do not comprise boric acid.
At last, in sample 6, the starch/ton of pulp fibers of about 20lb (about 1% boric acid is based on the weight of the starch that adds) and about 20lb Firebrake ZB/ton paper pulp fiber join in the batching.
Detect the physical and mechanical property of each hand-made paper sample then.The results are shown in the Table I.
Table I
Performance and unit Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6
Air drag Gurley s/100cc ??3.1 ??2.8 ??3.8 ??4.5 ??3.1 ??3.5
Apparent density g/cm 3 ??0.468 ??0.492 ??0.526 ??0.492 ??0.506 ??0.527
Substance g/m 2 ??307 ??328 ??326 ??326 ??346 ??325
Substance lb/1000ft 2 ??62.9 ??67.1 ??66.7 ??66.7 ??70.6 ??66.5
Bulk m 3/g ??2.14 ??2.03 ??1.90 ??2.03 ??1.99 ??1.90
Burst factor gf/cm 2/g/m 2 ??20.2 ??23.8 ??25.7 ??23.6 ??24.5 ??24.9
Bursting strength lbf/in 2 ??88.1 ??111 ??119 ??109 ??120 ??115
The thickness mil ??25.86 ??26.11 ??24.31 ??26.18 ??26.48 ??24.35
Instron breaking length m ??2940 ??3410 ??3290 ??3430 ??3180 ??3250
Instron maximum elongation rate % ??2.18 ??2.65 ??2.84 ??2.76 ??2.74 ??2.74
The maximum TEA in*lbf/in of Instron 2 ??0.825 ??1.21 ??1.26 ??1.20 ??1.16 ??1.16
Instron tensile strength lbf/in ??50.5 ??62.7 ??60.1 ??62.6 ??61.5 ??59.2
Instron Young's modulus of elasticity 1E+3lbf/in 2 ??159 ??186 ??176 ??188 ??179 ??190
Internal bond strength 1E-3 ft*lb/in 2 ??56 ??65 ??100 ??80 ??109 ??93
Compressive strength lbf/in ??26.32 ??31.46 ??32.06 ??31.79 ??35.15 ??30.38
Deflection Gurley mgf ??8010 ??9930 ??8840 ??10000 ??12600 ??9500
Tear factor 100gf/g/m 2 ??171 ??181 ??198 ??176 ??193 ??169
Tear gf ??524 ??592 ??646 ??572 ??668 ??550
Z-direction tensile strength lbf/in 2 ??26 ??30 ??35 ??33 ??37 ??42
Example II
The hand-made paper sample of producing a series of offset printing papers will add the effect of boron-containing compound and starch to be determined in the gluing press in the paper gluing.This cardboard is the pulp mixture formation from about 80% hardwood and about 20% cork.First (contrast) sample is that sample forms as a comparison.This pattern is starch of no use or boron-containing compound processing in the gluing press.
In sample 2, the 1 ground paper sample (base sheet) that forms is by applying 16% starch solids mixture and using Beloit gluing press to come gluing with the bar type measuring equipment per sample.In last amylopectin, do not comprise boron-containing compound.The StaleyPearl AP starch that starch is to use ammonium persulfate to transform.This starch applies with the pick up of the former pattern of about 100lb/ ton.
In sample 3, pattern forms and gluing as in the sample 2, and just starch solids applies with 10% solid content rather than 16% solid content.In addition, in last amylopectin, do not comprise boron-containing compound.
In sample 4, carry out gluing by the mixture that coating comprises 16% starch solids and borax (Boratex pentahydrate) according to the former pattern that forms in the sample 1.Borax is about 0.25% with the ratio (weight ratio) of starch solids in mixture.Before being coated on this pattern, the mixture of starch and borax with the ammonium persulfate boiling so that starch is transformed.This mixture applies and uses Beloit gluing press with this paper gluing with excellent measuring equipment.
In sample 5, gluing is carried out according to sample 4, and just the weight ratio of borax and starch solids is 0.50% rather than 0.25%.
In sample 6, starch applies with 10% starch solids concentration in mixture.Borax adds with 0.50% borax and starch solids weight ratio.At last, the pick up of excellent measuring equipment is reduced to the 60lb/ ton from the 100lb/ ton.
Detect the physical and mechanical property of each manual pattern then.The results are shown in the Table II.
Table II
Performance and unit Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6
Moisture expantion under the 15%-85% relative humidity ??0.87％ ??1.05％ ??1.08％ ??0.85％ ??1.10％
Air drag Gurley s/100cc ??9.5 ??11.8 ??11.6 ??12.5 ??10.6 ??11.3
Apparent density g/cm 3 ??0.620 ??0.623 ??0.618 ??0.620 ??0.626 ??0.623
Substance g/m 2 ??69.7 ??70.4 ??70.0 ??71.0 ??71.1 ??70.7
Substance lb/1300ft 2 ??18.5 ??18.7 ??18.6 ??18.9 ??18.9 ??18.8
Substance lb/3300ft 2 ??47.1 ??47.6 ??47.3 ??48.0 ??48.0 ??47.8
Brightness, directed (GE), %FS ??84.2 ??83.4 ??83.5 ??83.0 ??83.3 ??83.6
(GE) of brightness, orientation, %WS ??84.2 ??83.8 ??83.8 ??83.6 ??83.7 ??83.7
Bulk ASV cm 3/g ??1.61 ??1.61 ??1.62 ??1.61 ??1.60 ??1.61
Thickness? mil ??4.43 ??4.46 ??4.46 ??4.52 ??4.47 ??4.48
COF is dynamic ??0.353 ??0.306 ??0.304 ??0.312 ??0.258 ??0.266
COF static state ??0.456 ??0.440 ??0.415 ??0.471 ??0.396 ??0.444
??Dry?Pick?IGT，VVP?FS ??27.0 ??53.2 ??47.8 ??60.8 ??51.6 ??47.7
??Dry?Pick?IGT，VVP?WS ??36.3 ??35.7 ??40.2 ??40.1 ??35.8 ??37.4
Instron maximum elongation rate, % (MD) ??1.56 ??1.76 ??1.68 ??1.65 ??1.65 ??1.58
Instron maximum elongation rate, % (CD) ??3.28 ??4.14 ??3.77 ??3.83 ??3.26 ??3.90
The maximum TEA in*lbf/in of Instron 2(MD) ??0.161 ??0.216 ??0.210 ??0.194 ??0.205 ??0.197
The maximum TEA in*lbf/in of Instron 2(CD) ??0.219 ??0.290 ??0.259 ??0.302 ??0.227 ??0.259
Instron tensile strength MD/CD ratio ??2.01 ??2.21 ??2.35 ??1.92 ??2.19 ??2.35
Performance and unit Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6
Instron tensile strength lbf/in (MD) ??18.0 ??19.9 ??19.8 ??19.8 ??20.4 ??20.5
Instron tensile strength lbf/in (CD) ??8.94 ??9.01 ??8.44 ??10.3 ??9.32 ??8.74
Instron Young's modulus of elasticity 1E+3lbf/in 2(MD) ??469 ??506 ??524 ??515 ??533 ??547
Instron Young's modulus of elasticity 1E+3lbf/in 2(CD) ??209 ??200 ??190 ??228 ??209 ??185
The Instron internal bond strength, 1E-3ft*lb/in 2(MD) ??118 ??127 ??126 ??126 ??116 ??118
The Instron internal bond strength, 1E-3ft*lb/in 2(CD) ??114 ??127 ??124 ??131 ??113 ??116
Opacity Tappi (89% backing (backing)) ??89.1 ??98.8 ??88.9 ??89.0 ??89.2 ??89.0
Rate of liquid aspiration m/s FS ??3.00 ??3.00 ??3.00 ??3.00 ??3.00 ??3.00
Rate of liquid aspiration m/s WS ??3.00 ??3.00 ??3.00 ??3.00 ??3.00 ??3.00
Roughness Parker, um 10kgf/cm 2Soft background FS ??7.49 ??7.96 ??7.75 ??8.40 ??7.96 ??7.93
Roughness Parker, um 10kgf/cm 2Soft background WS ??9.73 ??10.07 ??10.00 ??9.72 ??9.68 ??9.96
Roughness Sheffield FS ??258 ??263 ??270 ??270 ??266 ??281
Roughness Sheffield WS ??302 ??323 ??320 ??320 ??313 ??329
Gluing Hereules, scc (1% printing ink, 80% end points) FS ??1 ??33 ??26 ??40 ??49 ??33
Gluing Hereules, scc (1% printing ink, 80% end points) WS ??1 ??14 ??18 ??21 ??21 ??19
Deflection Gurley, mgf (MD) ??123 ??130 ??149 ??154 ??148 ??146
Deflection Gurley, mgf (CD) ??48.4 ??62.5 ??67.9 ??81.7 ??70.6 ??65.3
Performance and unit Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6
Tear factor 100gf/g/m 2??(MD) ??15.8 ??15.6 ??15.7 ??14.1 ??15.5 ??15.6
Tear factor 100gf/g/m 2??(CD) ??17.2 ??17.0 ??15.7 ??16.9 ??18.3 ??17.0
Tear gf (MD) ??55.7 ??53.8 ??53.8 ??51.8 ??53.8 ??55.4
Tear gf (CD) ??57.6 ??58.2 ??56.6 ??61.4 ??60.2 ??57.0
Wax adhesion (wax pick), critical wax intensity no, FS ??7 ??11 ??10 ??14 ??11 ??11
The wax adhesion, critical wax intensity no, WS ??11 ??10 ??10 ??10 ??10 ??10
Z-direction tensile strength lbf/in 2 ??97 ??106 ??107 ??112 ??105 ??110
Though described each side of the present invention and embodiment preferred, should be realized that those skilled in the art can carry out various improvement, change and replacement in the spirit and scope of claims.

Claims (48)

1. method that forms paper or cardboard comprises:
The papermaking that contains cellulose fibre, starch and boron-containing compound batching is provided;
Form fibrous web from the papermaking batching; With
Dry this paper web.
2. the method for claim 1 comprises that further this paper web of press polish is to provide finished paper or cardboard.
3. the process of claim 1 wherein that the amount of starch is to be equal to or less than about 200lbs/ ton fiber.
4. the process of claim 1 wherein that the amount of boron-containing compound is the about 7 weight % that are equal to or less than starch.
5. the method for claim 1 comprises that further the starch that will transform and at least a portion boron-containing compound mix so that slurries to be provided, and the slurries of gained are joined in the cellulose fibre batching so that the papermaking batching to be provided.
6. the method for claim 5, further comprise unconverted starch and at least a portion boron-containing compound are mixed so that slurries to be provided, the slurries boiling of gained so that starch is transformed, and is joined in the cellulose fibre batching slurries of boiling so that the papermaking batching to be provided.
7. the method for claim 1 further comprises boron-containing compound and the starch that transformed are joined respectively in the cellulose fibre batching so that the papermaking batching to be provided.
8. the process of claim 1 wherein that boron-containing compound is selected from boric acid and metal borate.
9. the method for claim 8, wherein boron-containing compound is selected from boric acid, borax and Firebrake ZB.
10. the process of claim 1 wherein that boron-containing compound and starch form complex.
11. the process of claim 1 wherein that starch is anionic starch.
12. the process of claim 1 wherein that starch is cationic starch.
13. the process of claim 1 wherein that starch is amphiphilic starch.
14. the process of claim 1 wherein that starch is selected from cornstarch, wheaten starch, potato starch, rice starch, tapioca and sago starch.
15. paper or cardboard comprise the paper web that contains cellulose fibre, starch and boron-containing compound.
16. the paper of claim 14 or cardboard, wherein the amount of starch is to be equal to or less than about 200lbs/ ton fiber.
17. the paper of claim 14 or cardboard, wherein the amount of boron-containing compound is the about 7 weight % that are equal to or less than starch.
18. the paper of claim 14 or cardboard, wherein boron-containing compound is selected from boric acid and metal borate.
19. the paper of claim 17 or cardboard, wherein boron-containing compound is selected from boric acid, borax and Firebrake ZB.
20. the paper of claim 14 or cardboard, wherein boron-containing compound and starch form complex.
21. the paper of claim 11 or cardboard, wherein starch is anionic starch.
22. the paper of claim 11 or cardboard, wherein starch is cationic starch.
23. the paper of claim 11 or cardboard, wherein starch is amphiphilic starch.
24. the paper of claim 11 or cardboard, wherein starch is selected from cornstarch, wheaten starch, potato starch, rice starch, tapioca and sago starch.
25. a method that forms paper or cardboard comprises:
The papermaking that contains cellulose fibre batching is provided;
Form fibrous web from this papermaking batching;
Dry this paper web; With
With this paper web gluing, wherein said slurries contain starch solids and boron-containing compound by applying slurries to this paper web.
26. the method for claim 24 comprises that further this paper web of press polish is to provide finished paper or cardboard.
27. the method for claim 24, wherein slurries carry out boiling with converted starch before being coated on the paper web.
28. the method for claim 24, wherein the amount of starch is to be equal to or less than about 200lbs/ ton fiber.
29. the method for claim 24, wherein the amount of boron-containing compound is the about 7 weight % that are equal to or less than starch.
30. the method for claim 24, wherein boron-containing compound is selected from boric acid and metal borate.
31. the method for claim 29, wherein boron-containing compound is selected from boric acid, borax and Firebrake ZB.
32. the method for claim 29, wherein boron-containing compound and starch form complex.
33. the method for claim 29, wherein starch is anionic starch.
34. the method for claim 29, wherein starch is cationic starch.
35. the method for claim 29, wherein starch is amphiphilic starch.
36. the method for claim 29, wherein starch is selected from cornstarch, wheaten starch, potato starch, rice starch, tapioca and sago starch.
37. paper or cardboard comprise paper web that contains cellulose fibre and the sizing material that has coating on paper web, this sizing material comprises starch solids and boron-containing compound.
38. the paper of claim 36 or cardboard, wherein the amount of starch is to be equal to or less than about 200lbs/ ton fiber.
39. the paper of claim 36 or cardboard, wherein the amount of boron-containing compound is the about 7 weight % that are equal to or less than starch.
40. the paper of claim 36 or cardboard, wherein boron-containing compound is selected from boric acid and metal borate.
41. the paper of claim 39 or cardboard, wherein boron-containing compound is selected from boric acid, borax and Firebrake ZB.
42. the paper of claim 36 or cardboard, wherein boron-containing compound and starch form complex.
43. the paper of claim 36 or cardboard, wherein starch is anionic starch.
44. the paper of claim 36 or cardboard, wherein starch is cationic starch.
45. the paper of claim 36 or cardboard, wherein starch is amphiphilic starch.
46. the paper of claim 36 or cardboard, wherein starch is selected from cornstarch, wheaten starch, potato starch, rice starch, tapioca and sago starch.
47. the paper of claim 14 or cardboard, wherein the major part of boron-containing compound and starch be in described paper web the surface or near described paper surface.
48. the paper of claim 14 or cardboard, wherein the major part of boron-containing compound and starch is distributed in the whole described paper web.
CN03825229.5A 2002-09-17 2003-09-17 Papers comprising a boron-containing compound and a method of making same Pending CN1705797A (en)

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CN103966892A (en) * 2013-02-05 2014-08-06 金东纸业（江苏）股份有限公司 Papermaking auxiliary agent, papermaking process and paper product
CN103966894A (en) * 2013-02-05 2014-08-06 金东纸业（江苏）股份有限公司 Papermaking process
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CN105579642A (en) * 2013-09-06 2016-05-11 国际纸业公司 Paperboards having improved bending stiffness and method for making same
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AU2003260833A1 (en) 2004-04-08
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DE60333841D1 (en) 2010-09-30
CA2513488C (en) 2010-12-07
BR0314311A (en) 2005-07-26
CA2513488A1 (en) 2004-04-01
WO2004027149A1 (en) 2004-04-01
EP1540081B1 (en) 2010-08-18
ATE478196T1 (en) 2010-09-15

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