CN102677535A - Method for improving dehydration efficiency, increasing sheet wet web strength, increasing sheet wet strength and improving filler retention during papermaking - Google Patents
Method for improving dehydration efficiency, increasing sheet wet web strength, increasing sheet wet strength and improving filler retention during papermaking Download PDFInfo
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- CN102677535A CN102677535A CN2011100682238A CN201110068223A CN102677535A CN 102677535 A CN102677535 A CN 102677535A CN 2011100682238 A CN2011100682238 A CN 2011100682238A CN 201110068223 A CN201110068223 A CN 201110068223A CN 102677535 A CN102677535 A CN 102677535A
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Abstract
The invention provides a method for improving dehydration efficiency, increasing sheet wet web strength, increasing sheet wet strength and improving filler retention during papermaking. According to the method, a material for preventing a packing material from being adhered to an additive (a drainage aid, a sheet wet web strength aid or a sheet wet strength aid) is coated on at least a certain amount of filler particles to improve the efficiency of the drainage aid, the sheet wet web strength aid or the sheet wet strength aid. The drainage aid, the sheet wet web strength aid or the sheet wet strength aid tightly holds together and prevents the cellulose fibers from being wasted on the filler particles.
Description
The intersection application of association area
The application is the part continuity of the application 12/323,976 of submitting on November 26th, 2008.About the research of federation's patronage or the statement of exploitation
Inapplicable.
Background technology
The method that the present invention relates in paper-making process, to improve dewatering efficiency, improves plate wet web strength (sheet wet web strength), raising plate wet strength (sheet wet strength) and reinforcer confining force.Usually, in paper-making process, in wet end, add chemicals with the dehydration of assisting slip, improve confining force and improve wet web strength or dried paper web intensity.The wet end of paper technology is meant that fiber is distributed to the stage in the water with the slip form in the paper technology.Fiber-water slip forms wet web through drainage arrangement and dewatering process then.The solid content that this wet web forms after the technology is about 50%.Further dry wet paper web and form the dry plate of paper washer (paper mat).Paper washer comprises water and solid, general moisture 4 to 8%.The solid portion of paper washer comprises fiber (being generally cellulosic fibre), also can comprise filler.
Filler is during paper technology, to be added to paper washer with the opacity of enhancing gained paper and the mineral grain of reflective.At United States Patent (USP) the 7th, 211, some examples of filler have been described in No. 608.Filler comprises inorganic particle and organic granular or the pigment that is used for increasing opacity or brightness, minimizing porosity or reduces the cost of paper or cardboard sheet.Some examples of filler comprise one or more in following: kaolin, clay, talcum, titanium dioxide, hibbsite, barium sulfate, magnesium hydroxide, pigment is calcium carbonate, and analog for example.
Pearl filler adopts two kinds of form: GCC (calcium carbonate of grinding) and PCC (calcium carbonate of deposition).GCC is naturally occurring calcium carbonate rock, and PCC is the synthetic calcium carbonate of producing.Because PCC has bigger specific area, so PCC has preferably light scattering property and optical property preferably is provided for gained paper.Yet by the same token, the paper that the paper washer that PCC fills is produced is poorer than dry strength, wet strength and the wet web strength of the paper that GCC fills.
Filler is much littler than fiber usually, so filler has the specific area more much bigger than fiber.A challenge that in improving cardboard, it is found that in the filer content is the efficient that high filler has reduced wet-end chemicals, for example the efficient of chemical conditioner, wet web strength auxiliary agent and wet strength auxiliary agent.The present invention will provide novel filler pre-treatment, so that it reduces the absorption of wet-end chemicals on the filling surface, thereby improves the for example efficient of chemical conditioner, wet web strength auxiliary agent and wet strength auxiliary agent of wet-end chemicals.
The paper wet web strength is very crucial for the paper mill, because the wet web strength that raises can increase the mobile of machine and reduce plate fracture and machine-spoiled time.The paper wet web strength is the quantity of the key that forms between the crossed fiber of paper washer and the function of intensity.Filler particles with large surface area is easier to combine with those fibers, and disturbs the quantity and the intensity of those keys.Because the surface area of PCC filler is bigger, the PCC filler has disturbed those keys more than GCC.
The paper dewatering efficiency is also very crucial for the paper mill, because the dewatering efficiency that reduces in the wet web can increase in the drying process the demand of steam, reduces machine speed and production efficiency.Widely-used chemical conditioner improves dewatering efficiency, to cut down the consumption of energy, to improve machine speed and production efficiency.
Summary of the invention
At least one embodiment of the present invention relates to a kind of papermaking process, and it has the draining or the filler confining force of improved plate wet strength or wet web strength or increase through filler pre-treatment and drainage aids or wet web strength auxiliary agent or wet strength auxiliary agent are combined.Said method comprising the steps of: the blend of filler particles is provided, at least a draining additive or a kind of wet strength auxiliary agent or a kind of wet web strength auxiliary agent and cellulose fibre storing; Said filler particles is handled with composition of matter; Said filler particles is mixed with said cellulose fibre storing; With form paper washer through from said mixture, removing some water.At least 10% said filler particles is the calcium carbonate (PCC) of precipitation form, and at least 10% said filler particles is the calcium carbonate (GCC) of grinding form.Said cellulose fibre storing comprises a lot of cellulose fiber peacekeeping water.Said composition of matter suppresses drainage aids or wet strength additives or wet web strength additive and the adhesion of said filler particles.In at least one embodiment, said cellulose fibre storing and filler particles mix to form prepares burden (furnish), and said subsequently filler particles is handled with said composition of matter.
At least one embodiment of the present invention relates to a kind of method, and the blend of wherein said filler particles further comprises and is selected from a kind of in the group of being made up of calcium carbonate, organic pigment, inorganic pigment, clay, talcum, titanium dioxide, hibbsite, barium sulfate, magnesium hydroxide and their combination in any.
At least one embodiment of the present invention relates to a kind of method, and wherein said composition of matter is the AcAm/DADMAC copolymer.At least one embodiment of the present invention relates to a kind of method, and wherein said wet strength auxiliary agent or wet web strength additive or drainage aids are glyoxalated acrylamide/DADMAC copolymer.At least one embodiment of the present invention relates to a kind of method, and wherein said wet web strength additive or said wet strength auxiliary agent or drainage aids and said composition of matter carry identical charges.
At least one embodiment of the present invention relates to a kind of method, and wherein said calcium carbonate is a kind of form that is selected from the group of being made up of pulpous state calcium carbonate, chalk and their combination in any of dried calcium carbonate, dispersion.At least a portion calcium carbonate can be the slurry calcium carbonate form of dispersion, and the slurry calcium carbonate of said dispersion further comprises and is selected from least a in acrylic acid polymer dispersant, polyphosphate sodium dispersant, kaolin slurry and their combination in any.The blend of said filler particles can be 50%GCC and 50%PCC.Said composition of matter can be coagulant, and optional free inorganic coagulant, organic coagulant, polycondensation coagulant and their combination in any.Said coagulant can have 200 to 1,000,000 molecular weight.
At least one embodiment of the present invention relates to a kind of method; Wherein said composition of matter is a coagulant, and it is selected from the group of being made up of alum, sodium aluminate, polyaluminium chloride (polyaluminum chloride), the aluminium base chloride of hydroxyl (aluminum chlorohydroxide), hydroxy Al chloride (aluminum hydroxide chloride), the condensation polymer that gathers polymeric aluminum chloride (polyaluminum hydroxychloride), Sulfated polyaluminium chloride, polysilicate sulfuric acid aluminium (polyaluminum silica sulfate), ferric sulfate, iron chloride, chloropropylene oxide-dimethylamine (EPI-DMA), EPI-DMA ammonia crosslinked polymer, dichloro ethylene and the polymer of ammonia, the condensation polymer of multifunctional diethylentriamine, the condensation polymer of multifunctional tetren, the condensation polymer of multifunctional hexamethylenediamine, multifunctional dichloro ethylene, melamine polymers, formaldehyde resin polymer, positively charged vinyl addition polymer and their combination in any.
At least one embodiment of the present invention relates to a kind of method, and wherein wet strength auxiliary agent or drainage aids or wet web strength auxiliary agent can be paper washer 0.3 to 5kg additive per ton with respect to the ratio of said paper washer solid portion.At least the said GCC particle of part can use said composition of matter to handle.At least one embodiment of the present invention relates to a kind of method, and wherein said PCC particle all need not be handled by said composition of matter.Said filler particles can have the quality that as many as is the gross mass of 50% said paper washer solid portion.Said wet strength auxiliary agent or wet web strength additive or draining additive and said composition of matter portability identical charges.
At least one embodiment of the present invention relates to a kind of composition of matter that is used in the papermaking process.Said composition of matter comprises: cellulose, filler particles, wet strength auxiliary agent or wet web strength additive or draining additive and surround the coating of the said filler particles of part at least.Structure is also arranged said coating, to prevent said wet strength auxiliary agent or wet web strength additive or the said filler particles of draining additive adhesion.In at least one embodiment, the said filler particles of part is a calcium carbonate at least.In at least one embodiment, said filler particles is GCC, PCC or the combination of the two.In at least one embodiment, said filler particles comprises 10%PCC and 10%GCC at least.
Description of drawings
Below describe the present invention through concrete in detail with reference to accompanying drawing, wherein:
Fig. 1 is the figure of the improvement wet strength of demonstration paper constructed in accordance.
Fig. 2 is the figure of the improvement wet web strength of demonstration paper constructed in accordance.
Fig. 3 is for showing according to second figure that improves content of ashes in the plate of the present invention.
Fig. 4 is for showing the 3rd figure according to improvement filler confining force of the present invention.
Fig. 5 is for showing the figure that reduces (draining increase) according to vapour pressure of the present invention.
The specific embodiment
At least one embodiment of the present invention is a method of making the paper that comprises filler.At least one embodiment of the present invention is a papermaking process; It may further comprise the steps: the filler blends of setting up PCC and GCC; Wherein PCC at least 10% and the GCC that account for packing quality accounts at least 10% of packing quality; With at least some filler particles of coating preliminary treatment, said coating reduces bonding between wet web strength additive or drainage aids or wet strength auxiliary agent and the filler particles and with in filler blends and wet web strength additive or drainage aids or the wet strength auxiliary agent adding paper washer.
Known to strengthening the wet web strength of gained paper in wet web strength additive or drainage aids or the wet strength auxiliary agent adding paper washer or strengthening draining or improve machine speed and maneuverability or reinforcement plate wet strength.Some case descriptions of wet strength auxiliary agent, wet web strength additive and drainage aids are at United States Patent (USP) 7,125, in 469,7,615,135 and 7,641,776.
Unfortunately, do not add the reduction that a large amount of wet strength auxiliary agents or wet web strength additive or drainage aids cause with mass filler in the compensation paper washer in the practice.A reason is because those additives are very expensive, and uses a large amount of additives can cause commercial infeasible production cost.In addition, add the operability that too much additive has negative effect to papermaking process and suppresses the various forms paper making equipment.And cellulose fibre only can absorb a small amount of wet strength auxiliary agent or wet web strength additive or drainage aids.This causes restriction to using how many additives.A reason like this be because wet strength auxiliary agent or wet web strength additive or drainage aids be easy in and anion fiber/filler electric charge, and when these electric charges were neutralized, the further absorption of these additives was suppressed.
In paper washer, add the efficient that filler also reduces wet strength auxiliary agent or wet web strength additive or drainage aids.Those additives are easy to coat filler particles.The filler particles that exists is many more, and the additive that coats filler particles is many more, and wet strength auxiliary agent that therefore is used for cellulose fibre is combined or wet web strength additive or drainage aids tail off.Because this is the wet strength auxiliary agent that can add or the maximum of wet web strength additive or drainage aids, so more filler always means active strength additive still less.Because the high surface area of PCC applies more additive than GCC, so this effect of PCC is more obvious than GCC.
In at least one embodiment of the present invention, with at least some filler particles of composition of matter preliminary treatment, at least partly to prevent wet strength auxiliary agent or wet web strength additive or the bonding filler particles of drainage aids.Preliminary treatment is hoped to apply some or one or more whole filler particles fully with composition of matter.Perhaps, preliminary treatment hopes only to be coated with composition of matter one or more filler particles of a part, or hopes to apply some filler particles and only be coated with some a part of other particles with composition of matter.In at least one embodiment, preliminary treatment is with United States Patent (USP) the 5th, 221, and No. 435 described at least some composition of matter carry out, wherein said specifically band cationic charge material.In at least one embodiment, preliminary treatment is with United States Patent (USP) the 6th, 592,718 described diallyl-N, and the dibasic ammonium halide-acrylamide copolymer of N-carries out.
Though the pretreated filler particle is known in the art, the art methods of pretreated filler particle does not relate to the adhesion that influences wet strength auxiliary agent or wet web strength additive or drainage aids and filler particles.In fact, the many prior art preliminary treatment adhesion of additive and filler particles of gaining in strength.For example, United States Patent (USP) the 7th, 211 has been described the method for using hydrophobic polymer pretreated filler particle for No. 608.Yet this preliminary treatment is inoperative to the adhesion between strength additive and the filler particles, and only repels water to offset the excessive water that strength additive was absorbed.On the contrary, the present invention reduces the interaction between wet strength auxiliary agent or wet web strength additive or drainage aids and the filler particles, causes the unforeseeable increase of paper intensity, plate dehydration and machine run property.
Fig. 1 has shown that the tensile strength of given paper is to the relation of filler percentage with respect to the total solid part of producing the used paper washer of given paper.The result clearly illustrates that in the wet strength of not adding a little less than wet strength auxiliary agent 63700 (interim wet strength auxiliary agent) lower plate has extremely.Velox (velox) can significantly increase the plate wet strength.Simple filler pre-treatment does not increase the plate wet strength.Yet filler pre-treatment further increases the Velox performance, and this causes higher plate wet strength.
Fig. 2 has drawn with respect to the total solid part of producing the used paper washer of given paper, and the wet web tensile strength of given paper is to the graph of a relation of filler percentage.As shown in Figure 2, increasing filer content and reducing between the paper wet web strength is linear relationship.Do not adding nail (unit of length) section chemical conditioner (wet web strength auxiliary agent) at 63700 o'clock, cardboard has very poor wet web strength.Through using nail (unit of length) section chemical conditioner 63700 can significantly improve the plate wet web strength.Independent filler pre-treatment has negative effect to the paper wet web strength.Yet filler pre-treatment can further strengthen the performance of nail (unit of length) section chemical conditioner 63700, and can realize extra 20% wet strength improvement through the filler pre-treatment than low ash content.For higher content of ashes, 63700 performance even enhancing are greater than 20%.This is to be alleviated by filler pre-treatment because be directed against the efficient reduction of the strength additive of filler particles design.
At least some fillers that the present invention is contained are known and commercially available.They comprise and are used to increase opacity or brightness, reduce porosity or reduce any inorganic or the organic granular or the pigment of paper or scraps of paper plate cost.The most frequently used filler is calcium carbonate and clay.Yet talcum, titanium dioxide, hibbsite, barium sulfate and magnesium hydroxide also are applicable to filler.Calcium carbonate comprises the calcium carbonate of deposition of calcium carbonate (PCC) and dispersed paste form of the deposition of grinding calcium carbonate (GCC), the chalk of drying or dispersed paste form, any form.The dispersed paste form of GCC or PCC uses many acrylate copolymers dispersant or polyphosphate sodium dispersant to produce usually.Various these dispersants make the tangible negative electrical charge of calcium carbonate granule band.Kaolin slurry also uses acrylic acid polymer or polyphosphate sodium to disperse.
In at least one embodiment, the composition of matter of processing is a United States Patent (USP) 6,592, any one of composition of matter described in 718 or combination.Especially, any AcAm/DADMAC copolymer compositions of wherein describing in detail is suitable as the treated substance composition.The instance of AcAm/DADMAC copolymer compositions is the product #Nalco-4960 (hereinafter referred to as 4690) from Ondeo Nalco Co. of Illinois Naperville.
The composition of matter of handling can be coagulant.The coagulant that the present invention is contained is known and commercially available.They can be inorganic or organic.Representational inorganic coagulant comprises alum, sodium aluminate, polyaluminium chloride or PAC (be also referred to as the aluminium base chloride of hydroxyl, hydroxy Al chloride and gather polymeric aluminum chloride), Sulfated polyaluminium chloride, polysilicate sulfuric acid aluminium, ferric sulfate, iron chloride etc. and their blend.
Some organic coagulant that are applicable to the treated substance composition form through polycondensation.The instance of the polymer of this type comprises chloropropylene oxide-dimethylamine (EPI-DMA), the crosslinked polymer of EPI-DMA ammonia.
Other coagulant that is applicable to the treated substance composition comprises the polymer of dichloro ethylene and ammonia or at the condensation polymer of polymer, polyfunctional amine such as the diethylentriamine of dichloro ethylene that adds or do not add ammonia and dimethylamine, tetren, hexamethylenediamine etc. and dichloro ethylene with by the polymer of processing like melamine and formaldehyde resin condensation reaction.
Other coagulant that is applicable to the treated substance composition comprises the vinyl addition polymer of being with cationic charge; Like (methyl) acrylamide, diallyl-N; The dibasic ammonium halide of N-, dimethyl amino ethyl methacrylate and its quaternary ammonium salt, dimethyl amino ethyl acrylate and its quaternary ammonium salt, methacryl amido oxypropyl trimethyl ammonium chloride, diallyl methyl (β-propionamido) ammonium chloride, (Beta-methyl acryloxy ethyl) trimethyl ammonium Methylsulfate, quaternized polyvinyl lactam, vinyl amine and reacted polymer, copolymer and the trimer that generates Mannich or quaternary Mannich derivative.Preferred quaternary ammonium salt can use methyl chloride, dimethyl suflfate or benzyl chloride to prepare.Trimer can comprise anionic monomer such as acrylic acid or 2-acrylamido 2-methyl propane sulfonic acid, and condition is that whole electric charges are cationic on the polymer.The molecular weight ranges of these polymer that comprises vinyl addition and condensation is paramount to millions of from being low to moderate hundreds of.Preferably, molecular weight ranges should from about 20,000 to about 1,000,000.In at least one embodiment, preliminary treatment through will as the said composition of matter of the suitable composition of matter that is used for the pretreated filler particle a kind of, some or all combination arbitrarily carry out.
In at least one embodiment, wet strength auxiliary agent or wet web strength additive or drainage aids are carried identical electric charge with being applicable to the composition of matter of handling filler particles.When both carried identical charges, it is lower that filler additive is adsorbed onto its lip-deep possibility with wet strength auxiliary agent, wet web strength additive or drainage aids.The wet strength auxiliary agent that the present invention is contained, wet web strength additive or drainage aids comprise United States Patent (USP) 4; 605; 702 with any in the composition of matter described in the U.S. Patent application 2005/0161181A1, particularly wherein said various glyoxalated acrylamides/DADMAC copolymer compositions.The instance of glyoxalated acrylamide/DADMAC copolymer compositions is product # nail (unit of length) section 63700 (Ondeo Nalco Co. of Illinois Naperville produces).Another instance is the polymer that contains amine, comprises allylamine/acrylamide copolymer and polyvinylamine; An instance is polyamide-polyamine-chloropropylene oxide (PAE).
In at least one embodiment, used filler is PCC, GCC and/or kaolin.In at least one embodiment, used filler is PCC, GCC and/or kaolin or their blend that contains the acrylic acid polymer dispersant.Wet strength additives or wet web strength auxiliary agent or draining additive can be paper washer 3kg additive per ton with respect to the ratio of solid paper washer.
Can better understand foregoing with reference to following examples, the following example appears for explanation, is not intended to limit the scope of the invention.
1 (i) filler pre-treatment
Obtain the blend of filler particles from the paper mill.The filler of blend is the mixture of 50%PCC and 50%100%GCC.With running water this filler blends is diluted to 20% solid content.The filler blends of 200ml dilution is put in the glass beaker of 500ml.Before adding coagulant, stirred at least 30 seconds.Agitator is the top typed blender of EUROSTAR numeral, has the four blade sheet stirring vane (all being the IKA Works company available from the Wilmington, North Carolina State) of R1342,50mm.After initial 30 seconds mix,, 800rpm slowly adds coagulant solution under stirring.The coagulant solution that uses is 4690.Coagulant dosage is based on filler stem weight 1kg/ton.Under 800rpm, continue to stir until adding all coagulant.Then mixing speed is increased to 1500rpm, stirred 1 minute.
The 1 (ii) use of filler:
Pulverize the dried cover plate of commercially available bleached hardwood (hardwood dry lap) and prepare batching.The mixture of 50%PCC and 50%GCC is joined in the batching of pulp and obtain the different filer contents in the plate.With the nail (unit of length) section 61067 of 200ppm as retention agent.In order to carry out the preliminary treatment evaluation, before filler joins in the batching with nail (unit of length) section coagulant 4690 pretreated filler mixtures.Prepare in the process at handmade paper, the nail (unit of length) section 63700 that adds 3kg/ton improves the plate wet web strength.The result is shown among Fig. 2.We attempt estimating the influence of filler pre-treatment to 63700 compacting dewatering through measuring the plate wet web strength.Control identical stress level down at 60 ℃; Handmade paper is pressed onto a certain solid content (50%); Be recorded under the shearing force of 1000RPM and in water, rupture fully the required time of wet plate,, think that wet web strength has reflected the compacting dehydration indirectly with plate wet web strength relatively.The result who is shown among Fig. 2 shows that adding 63700 can significantly improve the plate wet web strength.Than under the low ash content, filler pre-treatment can further increase plate wet web strength 20%.For higher content of ashes, 63700 performance even be higher than 20%.
The operation machine testing, wherein paper machine prepares GAB300 with 900 meters/minute machine speed.Composition is provided, and cellulose fibre wherein is 14%MXW; The waste paper of 3% coating; 17%SOW; 12% uncoated waste paper; 44%DIP and 10%ONP.Batching also comprises GCC.In process of the test, comprise that all wet end additives of 15/ton nail (unit of length) section compacting chemical conditioner (press dewatering aid) 63700, retention agent, sizing agent and cationic starch keep constant.
1) enhancing of filler confining force:
Slowly be increased to 2kg/ton with 4690 from 0.5kg/ton (based on filler).Discovery is along with 4690 addings in loading pipe, and online content of ashes slowly raises, and is as shown in Figure 3.Obviously, through filler pre-treatment, obtained the rising of 0.7 grey branch of from 15.6% to 16.3%.In history, for other production of same level, when not using nail (unit of length) section 63700, the DCS content of ashes of record is about 12%.The increase that is to be noted that content of ashes is only facilitated by filler synusia (ply).So, in the filler synusia increase of content of ashes should be about 1.4% because the filler synusia constitutes the half the of end-product basis weight.Fig. 4 shows the FPAR of filler synusia.Clearly illustrate that wherein FPAR is elevated to 75% from 70%, this can be interpreted as any final content of ashes and obtain remarkable enhancing.
2) reduction of vapour pressure
Also find to handle the vapour pressure that has reduced predryer through filler, as shown in Figure 5.From the morning 10:30 to 2:00 in afternoon, vapour pressure from 2.15 the crust slowly be reduced to 2 the crust.Even the pressing pressure of the pressing pressure of first pressing part and second pressing part is reduced to 470 and 580 from 550 and 600 respectively, vapour pressure still only gets back to 2.05.
In process of the test, in filler pre-treatment after about 1 hour, content of ashes is elevated to 16.3% from about 15.6%, remains on the par several hrs then.On the other hand, vapour pressure keeps the decline several hrs, until reducing the compacting load.As if this show that it is not only because the rising of content of ashes that steam reduces.And the reduction of steam demand only derives from the filler synusia in this test, because 4690 only used on this synusia, so reduce should be less for the total steam that leans on content of ashes to raise separately to cause.So the result shows that filler pre-treatment can strengthen 63700 performances as compacting dehydrating agent (press dewatering agent) or wet web strength auxiliary agent.
Those of ordinary skills should be appreciated that all preceding methods can also be used to comprise other non-cellulose fiber materials paper washer, comprise cellulose family and non-cellulose fiber material, and/or the paper washer of synthetic fiber-like material.
Can composition, operation and the configuration of method of the present invention described herein be changed, and do not deviate from the principle and scope of the present invention that define in claims.Though can come embodiment of the present invention with the different form of many kinds, describe in detail here of the present invention especially preferred embodiment.The disclosure is the example of principle of the present invention, rather than will limit the invention to the specific embodiment described herein.And, the present invention includes some of various embodiments described herein or whole any possibly combinations.In this application or in any patent of quoting, the patent application of quoting or other data of quoting mentioned Anywhere all patents, patent application and other citations in view of the above by reference together integral body incorporate into.In addition, the present invention also expects and gets rid of any embodiment of quoting a kind of, some or all of compositions, method, composition, parts or other parts of material.
More than be disclosed as illustrative rather than exhaustive.To those skilled in the art, this specification will hint many variations and alternative.All these alternatives are included in the scope of these claims with changing, and wherein term " comprises " and is meant " including, but are not limited to ".Those are familiar with other equivalents that those skilled in the art can recognize the specific embodiment described herein, and these equivalents also are encompassed in these claims.
Here accomplished the description of preferred and alternate embodiment of the present invention.One skilled in the art will recognize that, other equivalents of the specific embodiment described herein, these equivalents are covered by in the appended claims.
Claims (19)
1. papermaking process that comprises filler said method comprising the steps of:
The blend of filler particles is provided, at least a draining additive or wet web strength additive or wet strength auxiliary agent and cellulose fibre storing,
Said filler particles is handled with composition of matter,
Said filler particles is mixed with said cellulose fibre storing,
With said mixture with at least a wet strength auxiliary agent or wet web strength additive or draining additive treating and
Form paper washer from said mixture,
Wherein at least 10% said filler particles is the calcium carbonate of deposition, and the calcium carbonate of at least 10% said filler particles for grinding,
Said cellulose fibre storing comprises a lot of cellulose fiber peacekeeping water, and
Said composition of matter improves the performance of wet strength auxiliary agent described in the said paper washer or wet web strength additive or draining additive.
2. method according to claim 1, wherein said paper washer forms through from said mixture, removing some water.
3. method according to claim 1, wherein at least some said calcium carbonate are a kind of forms that are selected from the group of being made up of pulpous state calcium carbonate, chalk and their combination in any of the calcium carbonate that does not disperse, dispersion.
4. method according to claim 1; Wherein the said calcium carbonate of part is the pulpous state calcium carbonate form of disperseing at least, and the pulpous state calcium carbonate of said dispersion further comprises and is selected from least a in acrylic acid polymer dispersant, polyphosphate sodium dispersant, kaolin slurry and their combination in any.
5. method according to claim 1, the blend of wherein said filler particles are the calcium carbonate of 50% grinding and the calcium carbonate of 50% deposition.
6. method according to claim 1, wherein said composition of matter is a coagulant.
7. method according to claim 1, wherein said composition of matter are the coagulant that is selected from the group of being made up of inorganic coagulant, organic coagulant, polycondensation coagulant and their combination in any.
8. method according to claim 1, wherein said composition of matter are to have 200 to 1,000, the coagulant of molecular weight in 000 scope.
9. method according to claim 1; Wherein said composition of matter is a coagulant, and said coagulant is selected from the group of being made up of the condensation polymer of alum, sodium aluminate, polyaluminium chloride, the aluminium base chloride of hydroxyl, hydroxy Al chloride, the polymer that gathers crosslinked polymer, dichloro ethylene and ammonia of polymeric aluminum chloride, Sulfated polyaluminium chloride, polysilicate sulfuric acid aluminium, ferric sulfate, iron chloride, chloropropylene oxide-dimethylamine (EPI-DMA), EPI-DMA ammonia, the polymer of dichloro ethylene, the polymer of dimethylamine, the condensation polymer of multifunctional diethylentriamine, the condensation polymer of multifunctional tetren, the condensation polymer of multifunctional hexamethylenediamine, multifunctional dichloro ethylene, melamine polymers, formaldehyde resin polymer, positively charged vinyl addition polymer and their combination in any.
10. method according to claim 1, wherein said composition of matter are the AcAm/DADMAC copolymers.
11. method according to claim 1, wherein said draining additive or wet web strength additive or wet strength auxiliary agent are to be selected from a kind of in the group of being made up of glyoxalated acrylamide/DADMAC copolymer, polyvinylamine, polyvinyl acid amides, polydiene propyl group amine and their combination in any.
12. method according to claim 1, wherein draining additive or wet web strength additive or wet strength auxiliary agent are paper washer 0.3 to 5kg strength additives per ton with respect to the ratio of said paper washer solid portion.
13. method according to claim 1, wherein the said GCC particle of part is handled with said composition of matter at least.
14. method according to claim 1, wherein said PCC particle all need not be handled by said composition of matter.
15. method according to claim 1, wherein said paper washer has solid portion, and the said filler particles in the said paper washer constitutes the gross mass greater than 50% said paper washer solid portion.
16. method according to claim 1, wherein said draining additive or wet web strength additive or wet strength auxiliary agent, and said composition of matter carries identical charges.
17. further comprising, method according to claim 1, the blend of wherein said filler particles be selected from a kind of in the group of forming by organic pigment, inorganic pigment, clay, talcum, titanium dioxide, hibbsite, barium sulfate, magnesium hydroxide and their combination in any.
18. composition of matter that is used in the papermaking process; Said composition of matter comprises: cellulose, have blend, draining additive or wet web strength additive or the wet strength auxiliary agent of the filler particles of 10%PCC and 10%GCC at least; With surround the coating of the said filler particles of part at least; Make up and arrange and adhere to said coating on the said filler particles to prevent said draining additive or wet web strength additive or wet strength auxiliary agent.
19. one kind increases draining additive or wet web strength additive or wet strength auxiliary agent and is mixed with interactional method between the cellulose fibre of filler particles, said method comprising the steps of:
Said filler particles is used the composition of matter preliminary treatment,
Will through pretreated filler particles mix with cellulose fibre and
Said mixture is handled with at least a draining additive or wet web strength additive or wet strength auxiliary agent,
Wherein said filler particles is selected from by in the calcium carbonate of calcium carbonate, the grinding of deposition and the group that their combination in any are formed, and
Said composition of matter suppresses said draining additive or wet web strength additive or wet strength auxiliary agent and adheres to said filler particles.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110068223.8A CN102677535B (en) | 2011-03-11 | 2011-03-11 | The method of dewatering efficiency, increase plate wet web strength, increase plate wet strength and raising filler confining force is improved in papermaking |
| US13/272,714 US8465623B2 (en) | 2008-11-26 | 2011-10-13 | Method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in papermaking |
| PCT/US2012/024049 WO2012125235A2 (en) | 2011-03-11 | 2012-02-07 | A method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in papermaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110068223.8A CN102677535B (en) | 2011-03-11 | 2011-03-11 | The method of dewatering efficiency, increase plate wet web strength, increase plate wet strength and raising filler confining force is improved in papermaking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102677535A true CN102677535A (en) | 2012-09-19 |
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| CN201110068223.8A Active CN102677535B (en) | 2008-11-26 | 2011-03-11 | The method of dewatering efficiency, increase plate wet web strength, increase plate wet strength and raising filler confining force is improved in papermaking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295797A (en) * | 2018-09-26 | 2019-02-01 | 扬州市祥华新材料科技有限公司 | A kind of preparation method for punching high tenacity paper |
| JP2019056050A (en) * | 2017-09-20 | 2019-04-11 | ソマール株式会社 | Cationic filler-treatment agent |
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| US4943349A (en) * | 1980-10-21 | 1990-07-24 | Papeteries De Gascogne | Process for preparing a sheet material with improved on-machine retention |
| US20030109617A1 (en) * | 2000-04-18 | 2003-06-12 | Mari Niinikoski | Method for pretreatment of filler, modified filler with a hydrophobic polymer and use of the hydrophobic polymer |
| CN101736656A (en) * | 2008-11-26 | 2010-06-16 | 纳尔科公司 | Method of increasing filler content in papermaking |
| CN101802304A (en) * | 2007-09-12 | 2010-08-11 | 纳尔科公司 | Controllable filler prefloculation using a dual polymer system |
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|---|---|---|---|---|
| US4943349A (en) * | 1980-10-21 | 1990-07-24 | Papeteries De Gascogne | Process for preparing a sheet material with improved on-machine retention |
| US20030109617A1 (en) * | 2000-04-18 | 2003-06-12 | Mari Niinikoski | Method for pretreatment of filler, modified filler with a hydrophobic polymer and use of the hydrophobic polymer |
| CN101802304A (en) * | 2007-09-12 | 2010-08-11 | 纳尔科公司 | Controllable filler prefloculation using a dual polymer system |
| CN101736656A (en) * | 2008-11-26 | 2010-06-16 | 纳尔科公司 | Method of increasing filler content in papermaking |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2019056050A (en) * | 2017-09-20 | 2019-04-11 | ソマール株式会社 | Cationic filler-treatment agent |
| CN109295797A (en) * | 2018-09-26 | 2019-02-01 | 扬州市祥华新材料科技有限公司 | A kind of preparation method for punching high tenacity paper |
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