WO2021082365A1 - 一种高松厚度高光泽双面铜版纸的抄造方法 - Google Patents

一种高松厚度高光泽双面铜版纸的抄造方法 Download PDF

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Publication number
WO2021082365A1
WO2021082365A1 PCT/CN2020/085446 CN2020085446W WO2021082365A1 WO 2021082365 A1 WO2021082365 A1 WO 2021082365A1 CN 2020085446 W CN2020085446 W CN 2020085446W WO 2021082365 A1 WO2021082365 A1 WO 2021082365A1
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Prior art keywords
coating
pulp
bulk
coated paper
sided coated
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Ceased
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PCT/CN2020/085446
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English (en)
French (fr)
Inventor
谢碧爱
梁昌良
邵治涛
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Hainan Jinhai Pulp and Paper Co Ltd
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Hainan Jinhai Pulp and Paper Co Ltd
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Application filed by Hainan Jinhai Pulp and Paper Co Ltd filed Critical Hainan Jinhai Pulp and Paper Co Ltd
Priority to ZA2020/07480A priority Critical patent/ZA202007480B/en
Publication of WO2021082365A1 publication Critical patent/WO2021082365A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/009—Apparatus for glaze-coating paper webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/02—Methods of beating; Beaters of the Hollander type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/08—Mechanical or thermomechanical pulp
    • 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
    • D21H17/29—Starch cationic
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters

Definitions

  • the invention relates to the technical field of papermaking, in particular to a method for making high bulk and high gloss double-sided coated paper.
  • the double-sided coated paper is characterized by its smooth surface, high smoothness and good gloss, which is conducive to obtaining vibrant and clear patterns and text after printing. It is mainly used for printing high-end books, periodicals, magazines, various extraordinar product advertisements, and color Printed materials such as pictorials and children's books. Bulkness, as a key and important indicator of coated paper, largely determines the opacity and stiffness of coated paper, and bulkiness has an important impact on product cost and product performance, so it has attracted consumers' attention. Most of the high bulk double-sided coated paper made on the market is made by Fourdrinier wire with a low paper machine speed, while the bulk of double-sided coated paper made with a single-layer laminated paper machine is less than 1cm 3 /g.
  • the present invention provides a method for making high bulk and high gloss double-sided coated paper.
  • the product developed by this technology has a speed of up to 1300m. /min, based on single-layer interlayer paper making, using the industry's unique MSP coating (double-sided overcoating) + doctor blade coating process, double-sided coated paper with high bulk and high gloss.
  • a method for making high-bulk and high-gloss double-sided coated paper includes the following steps:
  • Pulp preparation select alkaline hydrogen peroxide mechanical pulp, and use a decomposer to disperse the pulp to prepare a pulp with a freeness of 300-400ml and a bulk thickness of ⁇ 3.0cm 3 /g; bleach the sulfate Hardwood pulp, bleached softwood kraft pulp, and alkaline hydrogen peroxide mechanical pulp are mixed and formulated in a weight ratio of 50-60%, 10-20%, and 30-40% respectively;
  • step 2) Wet end: After the slurry is mixed according to the ratio of step 1), add 10-14% ground calcium carbonate by weight percentage; add 6-8kg/t of positive starch, and the slurry enters the head box after screening and purification;
  • Pre-drying The wet paper web after pressing is dried by a dryer in the pre-drying stage to form uncoated base paper.
  • the base paper has a basis weight of 110-115 g/m 2 and a moisture content of 4 to 6%;
  • the base paper uses starch glue on the sizing roller for sizing and coating on both sides, and the coating amount on both sides is 1 ⁇ 4g/m 2 respectively ;
  • Primer coating the base paper after the glue coating is finished, film transfer coating is used for primer coating, bottom coating metering bar pressure: upper roller/lower roller: 1.5 ⁇ 1.7/1.5 ⁇ 1.7bar, coating in an amount of 18 ⁇ 20g / m 2; a base coating composition comprising, by weight percent: particles less than 2um content of> 65% 100% ground calcium carbonate, 4 to 7% SBR latex and 10 ⁇ biolatex 15%, coating solid content is 62 ⁇ 66%, low shear viscosity is 400 ⁇ 600cps;
  • Step 6 On the basis of step 6), use a doctor blade to apply intermediate coating.
  • the coating amount is 10-12g/m 2 on one side, and the intermediate coating is applied on both sides.
  • the intermediate coating blade pressure is 40-55. % (Displayed on the operation interface, usually understood as 40-55% of the maximum pressure), the knife angle is 30-40degree;
  • the intermediate coating includes the following ingredients, in weight percentage: the content of particles with a particle size of less than 2um>65% Ground calcium carbonate 100%, styrene-butadiene latex 4-7% and biological latex 5-8%, the solid content of the coating is 62-66%, and the low-shear viscosity is 800-1000cps;
  • Top coat coating On the basis of step 7), carry out top coat coating, the coating amount is 9-12g/m 2 on one side, a total of both sides are coated, and the top coating blade pressure is between 40-55% , The knife angle is 30 ⁇ 40degree; the top coating includes the following ingredients, calculated by weight percentage: 90-97% of ground calcium carbonate with a particle size of less than 2um> 98%, and 3-5% of porcelain clay with a particle size of 1um> 90% , Styrene-butadiene latex 7-10% and biological latex 1-3%, paint solid content is 68-70%, low-shear viscosity is 1200-1400cps;
  • Calendering The calendering mode adopts 8nip, the calendering machine adopts 2+4+7+9 nip, the calendering temperature is 150 ⁇ 180°C, and the line pressure is 40 ⁇ 50kN/m.
  • step 1) before mixing, bleached hardwood kraft pulp and bleached softwood kraft pulp are pulped and refined respectively to obtain a freeness of 400-500ml and a bulk thickness of 1.25-1.35cm 3 /g of slurry.
  • step 1) before mixing, the alkaline hydrogen peroxide mechanical pulp is only dispersed without refining, and the inlet and outlet pressure of the decanter is 2.0-4.0 bar.
  • the content of particles with a particle size of less than 2um in the ground calcium carbonate is ⁇ 65%, and the degree of substitution of the positive starch is 0.028-0.032.
  • the glue solution is prepared from enzyme-cut starch, with a solid content of 10% and a viscosity of 25 cps.
  • the first coating blade pressure of the intermediate coating is 42% and the knife angle is 40 degrees
  • the second coating blade pressure is 45% and the knife angle is 40 degrees.
  • the first coating blade pressure of the top coating is 38%, and the knife angle is 35 degrees, and the second coating blade pressure is 40%, and the knife angle is 35 degrees.
  • the calendering temperature of nip 2 and nip 4 is 150°C
  • the calendering temperature of nip 7 and 9 is 180°C
  • the linear pressure is 40-50 kN/m.
  • the present invention adopts 100% high bulk (bulk thickness above 3.0cm 3 /g) alkaline hydrogen peroxide mechanical pulp through the selection of pulp, and strictly controls its dosage to make it compatible with other pulp (kraft coniferous wood). Pulp, bleached kraft hardwood pulp) maintain a proper ratio, and at the same time, in order to maintain the bulk of the alkaline hydrogen peroxide mechanical pulp, the present invention does not perform refining in the pulp preparation stage, but only uses a decomposer to disperse the pulp.
  • the unique MSP (double-sided coating) + doctor blade coating process is used for multi-layer coating, and the knife pressure, knife angle and other parameters of each coating head are adjusted to make the final quantitative paper into papermaking was 170g / m 2 or so, the bulk of greater than 1cm 3 / g, 60 to 70% gloss, smoothness greater than 600s, the bending stiffness is greater than 2.4mNm. It can be seen that the present invention uses a high-speed interlaced paper machine, through the cooperation of slurry, coating design, coating process and calendering process, successfully papermaking a high bulk, high gloss, high smoothness and good bending stiffness. Coated paper.
  • the present invention also found that the use of different squeegee pressures and knife angles, different calendering temperatures and line pressures can further improve gloss, smoothness and bending stiffness.
  • the materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial sources unless otherwise specified.
  • a method for making high-bulk and high-gloss double-sided coated paper includes the following steps:
  • Pulp preparation use alkaline hydrogen peroxide mechanical pulp, and use a decomposing machine (the inlet and outlet pressure of the decomposing machine is 2.0 ⁇ 4.0bar) to disperse the slurry to obtain a freeness of 300ml and a bulk thickness of 3.1cm 3 /g pulp; bleached kraft hardwood pulp for dispersing and refining to obtain a slurry with a freeness of 400ml and a bulk of 1.26cm 3 /g; bleached softwood kraft pulp for dispersing and refining Pulp, the freeness is 405ml, and the bulk is 1.25cm 3 /g; the bleached kraft hardwood pulp, bleached softwood kraft pulp and alkaline hydrogen peroxide mechanical pulp are respectively 50% by weight. %, 10%, 40% for mixing and slurry preparation;
  • step 2) Wet end: After the slurry is mixed according to the ratio of step 1), add 14% ground calcium carbonate by weight percentage (particle content less than 2um ⁇ 65%); add 6kg of positive starch (degree of substitution: 0.028) /t, the slurry enters the head box after screening and purification;
  • the interlaced paper machine includes a head box, a forming wire, and a pressing section.
  • the slurry is fed into the head box by a wet-end flow system, and then sprayed on the interlocking wire for dehydration and forming, and further dehydrated in the pressing section.
  • the speed of the net part is 1300m/min, and the speed ratio of pulp to net is 1.04;
  • Pre-drying The wet paper web after pressing is dried in the pre-drying stage to form uncoated base paper with a basis weight of 110g/m 2 and a moisture content of 6.0%;
  • the base paper uses starch glue on the sizing roller to sizing on both sides, the coating amount on both sides is 1.0g/m 2 respectively; the glue is prepared from enzyme-cut starch, the solid content is 12%, and the viscosity is 30cps;
  • Primer coating the base paper after the glue coating is coated, using film transfer coating for primer coating, bottom coating metering bar pressure: upper roller/lower roller: 1.5/1.7bar, coating amount is 18g/ m 2 ;
  • the primer coating includes the following ingredients, in percentage by weight: the content of particles with a particle size of less than 2um> 65% ground calcium carbonate 100%, styrene butadiene latex 4% and biological latex 10%, the solid content of the coating is 66%, low Shear viscosity is 600cps;
  • Step 6 On the basis of step 6), use a doctor blade to apply intermediate coating.
  • the coating amount is 10-11g/m 2 on one side.
  • a total of two intermediate coatings are applied.
  • the intermediate coating blade pressure is 40%.
  • the knife angle is 30degree, and the total amount of two coatings is 20.7g/m 2 ;
  • the intermediate coating includes the following ingredients, in weight percentage: the content of particles with a particle size of less than 2um>65% ground calcium carbonate 100%, styrene butadiene latex 4% And biological latex 5%, coating solid content is 62%, low shear viscosity is 800cps;
  • top coat coating On the basis of step 7), carry out top coat coating, the coating amount is 9 ⁇ 10g/m 2 on one side, a total of two sides are coated, the top coating blade pressure is 40%, and the knife angle is 30degree, twice the total coating amount of 18.9g / m 2;
  • the top coating material comprising the following components, by weight percent: particles less than 2um content of> 98% 90% ground calcium carbonate, the content of particles less than 1um of> 90% porcelain clay 3%, styrene-butadiene latex 7% and biological latex 1%, the solid content of the coating is 68%, and the low-shear viscosity is 1200cps;
  • Calendering Voith Super Calender Janus Calender MK2 is used, the calendering mode is 8nip, the calendering is 2+4+7+9 nip, the calendering temperature is 150°C, and the line pressure is 50kN/m.
  • a method for making high-bulk and high-gloss double-sided coated paper includes the following steps:
  • Pulp preparation use alkaline hydrogen peroxide mechanical pulp, and use a decomposing machine (the inlet and outlet pressure of the decomposing machine is 2.0 ⁇ 4.0bar) to disperse the slurry to obtain a freeness of 400ml and a bulk thickness of 3.3cm 3 /g of pulp; bleached kraft hardwood pulp for dispersing and refining to obtain a pulp with a freeness of 500ml and a bulk of 1.35cm 3 /g; bleached kraft softwood pulp for dispersing and refining Pulp, the freeness is 500ml, the bulk is 1.33cm 3 /g; the bleached kraft hardwood pulp, bleached softwood kraft pulp and alkaline hydrogen peroxide mechanical pulp are respectively 60% by weight. %, 20%, 30% for mixing and slurry preparation;
  • step 2) Wet end: After the slurry is mixed according to the ratio of step 1), add 10% ground calcium carbonate by weight percentage (the content of particles with a particle size less than 2um ⁇ 65%); add 8kg of positive starch (degree of substitution is 0.032) /t, the slurry enters the head box after screening and purification;
  • Pre-drying The wet paper web after pressing is dried by a dryer in the pre-drying stage to form uncoated base paper.
  • the basis weight of the base paper is 115g/m 2 , and the moisture content is 5.2%;
  • the base paper uses starch glue on the sizing roller to sizing on both sides, the coating amount on both sides is 4.0g/m 2 respectively; the glue is prepared from enzyme-cut starch, the solid content is 12%, and the viscosity is 30cps;
  • Primer coating the base paper after the glue coating is coated, using film transfer coating for primer coating, bottom coating metering bar pressure: upper roller/lower roller: 1.7/1.5bar, and the coating amount is 20g/ m 2 ;
  • the primer coating includes the following components, calculated by weight percentage: the content of particles with a particle size of less than 2um> 65% ground calcium carbonate 100%, styrene-butadiene latex 7% and biological latex 15%, the solid content of the coating is 62%, low Shear viscosity is 400cps;
  • step 6 On the basis of step 6), use a doctor blade to apply intermediate coating.
  • the coating amount is 11-12g/m 2 on one side.
  • a total of two intermediate coatings are applied.
  • the intermediate coating blade pressure is 55%.
  • the knife angle is 30degree, and the total coating amount is 22.8g/m 2 twice;
  • the intermediate coating includes the following ingredients, calculated by weight percentage: the content of particles with a particle size of less than 2um>65% ground calcium carbonate 100%, styrene butadiene latex 7% And biological latex 8%, coating solid content is 66%, low shear viscosity is 1000cps;
  • Top coat coating On the basis of step 7), carry out top coat coating, the coating amount is 11-12g/m 2 on one side, a total of two top coats are applied, and the top coat blade pressure is between 55%. The angle is 40degree, and the total amount of two coatings is 23.5g/m 2 ; the top coating includes the following ingredients, in percentage by weight: the content of particles with a particle size of less than 2um>98% of ground calcium carbonate 97%, and particles with a particle size of less than 1um The content is >90% porcelain clay 5%, styrene-butadiene latex 10% and biological latex 3%, the solid content of the coating is 70%, and the low shear viscosity is 1400 cps;
  • Calendering Voith Super Calender Janus Calender MK2 is used, the calendering mode is 8nip, the calendering is 2+4+7+9 nip, the calendering temperature is 180°C, and the line pressure is 40kN/m.
  • a method for making high-bulk and high-gloss double-sided coated paper includes the following steps:
  • Pulp preparation use alkaline hydrogen peroxide mechanical pulp, and use a decomposing machine (the inlet and outlet pressure of the decomposing machine is 2.0 ⁇ 4.0bar) to disperse the slurry to obtain a freeness of 400ml and a bulk thickness of 3.3cm 3 /g of pulp; bleached kraft hardwood pulp for dispersing and refining to obtain a pulp with a freeness of 500ml and a bulk of 1.35cm 3 /g; bleached kraft softwood pulp for dispersing and refining Pulp, the freeness is 500ml, the bulk thickness is 1.33cm 3 /g; the bleached kraft hardwood pulp, bleached softwood kraft pulp and alkaline hydrogen peroxide mechanical pulp are prepared in a weight ratio of 53 %, 12%, 35% for mixing and slurry preparation;
  • step 2) Wet end: After the slurry is mixed according to the ratio of step 1), add 13% ground calcium carbonate by weight percentage (the content of particles smaller than 2um is less than 65%); add positive starch (degree of substitution is 0.028 ⁇ 0.032) ) 7kg/t, the slurry enters the head box after screening and purification;
  • Pre-drying The wet paper web after pressing is dried in the pre-drying stage to form uncoated base paper with a basis weight of 110g/m 2 and a moisture content of 4.7%;
  • the base paper uses starch glue on the sizing roller to sizing on both sides, the coating amount on both sides is 2.3g/m 2 respectively; the glue is prepared from enzyme-cut starch, the solid content is 10%, and the viscosity is 25cps;
  • Primer coating the base paper after glue coating is coated by film transfer type for primer coating, bottom coating metering bar pressure: upper roller/lower roller: 1.61/1.63bar, and the coating amount is 18g/ m 2 ;
  • the primer coating includes the following ingredients, in percentage by weight: the content of particles with a particle size of less than 2um> 65% ground calcium carbonate 100%, styrene butadiene latex 4% and biological latex 12%, the solid content of the coating is 66%, low Shear viscosity is 500cps;
  • Intermediate coating On the basis of step 6), use a doctor blade to apply intermediate coating.
  • the coating amount is 10-11g/m 2 on one side.
  • a total of two intermediate coatings are applied.
  • the intermediate coating blade pressure is 40%. knife angle is 40degree, twice the total coating amount 21.5g / m 2;
  • intermediate coating composition comprising, by weight percent: particles less than 2um content of> 65% ground calcium carbonate 100%, 5% SBR latex And biological latex 7%, coating solid content is 63%, low shear viscosity is 900cps;
  • Top coat coating On the basis of step 7), carry out top coat coating, the coating amount is 10 ⁇ 11g/m 2 on one side, a total of two top coats are applied, and the top coat blade pressure is between 40%. Angle is 40degree, twice the total coating amount 20.3g / m 2; the top coating material comprising the following components, by weight percent: particles less than 2um content of> 98% ground calcium carbonate 97%, a particle size of less than 1um The content is >90% 3% porcelain clay, 8% styrene butadiene latex and 2% biological latex, the solid content of the coating is 69%, and the low-shear viscosity is 1300cps;
  • Calendering Voith Super Calender Janus Calender MK2 is used, the calendering mode is 8nip, the calendering is 2+4+7+9 nip, the calendering temperature is 180°C, and the line pressure is 50kN/m.
  • Example 4 The main differences between Example 4 and Example 3 are:
  • the first coating blade pressure of the intermediate coating is 42%, and the knife angle is 40 degree.
  • the second coating blade pressure is 45% and the knife angle is 40 degree.
  • the first coating blade pressure of the top coating is 38%, and the knife angle is 35 degrees, and the second coating blade pressure is 40%, and the knife angle is 35 degrees.
  • step 9 the calendering temperature of the 2nd and 4th nip is 150°C, and the linear pressure is 50kN/m; the calendering temperature of the 7th and 9th nip is 180°C, and the linear pressure is 40kN/m.
  • a method for making high-bulk and high-gloss double-sided coated paper includes the following steps:
  • Pulp preparation use alkaline hydrogen peroxide mechanical pulp, and use a decomposing machine (the inlet and outlet pressure of the decomposing machine is 2.0 ⁇ 4.0bar) to disperse the slurry to obtain a freeness of 400ml and a bulk thickness of 3.3cm 3 /g of pulp; bleached kraft hardwood pulp for dispersing and refining to obtain a pulp with a freeness of 500ml and a bulk of 1.35cm 3 /g; bleached kraft softwood pulp for dispersing and refining Pulp, the freeness is 500ml, the bulk thickness is 1.33cm 3 /g; the bleached kraft hardwood pulp, bleached softwood kraft pulp and alkaline hydrogen peroxide mechanical pulp are prepared in a weight ratio of 53 %, 12%, 35% for mixing and slurry preparation;
  • step 2) Wet end: After the slurry is mixed according to the ratio of step 1), add 13% ground calcium carbonate by weight percentage (the content of particles smaller than 2um is less than 65%); add positive starch (degree of substitution is 0.028 ⁇ 0.032) ) 7kg/t, the slurry enters the head box after screening and purification;
  • Pre-drying The wet paper web after pressing is dried in the pre-drying stage to form uncoated base paper with a basis weight of 110g/m 2 and a moisture content of 4.7%;
  • the base paper uses starch glue on the sizing roller to sizing on both sides, the coating amount on both sides is 2.3g/m 2 respectively; the glue is prepared from enzyme-cut starch, the solid content is 10%, and the viscosity is 25cps;
  • Primer coating the base paper after glue coating is coated by film transfer type for primer coating, bottom coating metering bar pressure: upper roller/lower roller: 1.61/1.63bar, the coating amount is 15.6g /m 2 ;
  • the primer coating includes the following components, in percentage by weight: the content of particles with a particle size of less than 2um> 65% ground calcium carbonate 100%, styrene butadiene latex 3.5% and biological latex 12%, the solid content of the coating is 66%, Low shear viscosity is 500cps;
  • Step 6 On the basis of step 6), use a doctor blade to apply intermediate coating.
  • the coating amount is 10-12g/m 2 on one side.
  • a total of two intermediate coatings are applied.
  • the intermediate coating blade pressure is 40%.
  • the knife angle is 40degree, and the total coating amount is 22.6g/m 2 twice;
  • the intermediate coating includes the following ingredients, calculated by weight percentage: the content of particles with a particle size of less than 2um>65% ground calcium carbonate 100%, styrene butadiene latex 3% And biological latex 7%, paint solid content is 64%, low shear viscosity is 900cps;
  • Top coat coating On the basis of step 7), carry out top coat coating, the coating amount is 9-12g/m 2 on one side, a total of two top coats are applied, and the top coat blade pressure is between 40%. The angle is 40degree, and the total amount of two coatings is 21.5g/m 2 ; the top coating includes the following ingredients, in weight percentage: the content of particles with a particle size of less than 2um>98% of ground calcium carbonate 97%, and particles with a particle size of less than 1um Content>90% porcelain clay 7%, styrene-butadiene latex 8% and biological latex 2%, paint solid content is 69%, low shear viscosity is 1300cps;
  • Calendering Voith Super Calender Janus Calender MK2 is used, the calendering mode is 8nip, the calendering is 2+4+7+9 nip, the calendering temperature is 180°C, and the line pressure is 50kN/m.
  • the bulk of the coated paper made by the solution of the present invention is greater than 1 cm 3 /g, the gloss is 60-70%, the smoothness is greater than 600 s, and the bending stiffness is greater than 2.4 mNm.
  • the bulk thickness of the coated paper made in Comparative Examples 1 to 2 is less than 1 cm 3 /g, and the gloss, smoothness and bending stiffness are all inferior to the examples.

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Abstract

本发明公开了一种高松厚度高光泽双面铜版纸的抄造方法，本发明通过合理的浆料选型，采用硫酸盐针叶木浆、漂白硫酸盐阔叶木浆和100％高松厚度的碱性过氧化氢机械浆，严格控制各浆料配比，并采用特有的涂料配方，基于单层夹网原纸抄造，在车速高达1300m/min的高速纸机上，采用独有的MSP(双面上涂)+刮刀涂布工艺进行多层涂布，调整各涂布头的刀压刀角等参数，使得最终抄造的成纸定量为170g/m 2左右，松厚度大于1cm 3/g，光泽度60～70％，平滑度大于600s，弯曲挺度大于2.4mNm。

Description

一种高松厚度高光泽双面铜版纸的抄造方法 技术领域
本发明涉及造纸技术领域，具体涉及一种高松厚度高光泽双面铜版纸的抄造方法。
背景技术
双面铜版纸的特点在于纸面光洁平整，平滑度高，光泽度好，利于在印刷后获得精美清晰的图案和文字，主要用于印刷高级书刊、期刊杂志、各种精美的商品广告、彩色画报、儿童读物等印刷品。松厚度作为铜版纸的一个关键重要指标，很大程度上决定了铜版纸的不透明度和挺度，而且松厚度对产品成本和产品性能有重要影响，因此备受消费者的关注。现在市面上抄造的高松厚双面铜版纸大部分为纸机车速较低的长网抄造，而使用单层夹网纸机抄造的双面铜版纸的松厚度则小于1cm 3/g，一般在0.80～0.90cm 3/g之间，未能达到高松厚的要求。也有小部分可达到高松厚度的要求，但是由于使用了较高比例的机械浆，导致成纸粗糙度较大，光泽度和平滑度较低。
发明内容
鉴于现有技术的不足，本发明提供一种高松厚度高光泽双面铜版纸的抄造方法。相比市面上大部分为纸机车速较低的长网抄造的双面铜版纸，或者纸机车速在1300m/min以下的夹网抄造的双面铜版纸，本技术开发的产品是车速高达1300m/min，基于单层夹网原纸抄造，采用行业独有的MSP涂布(双面上涂)+刮刀涂布工艺，具有较高松厚度、高光泽度的双面铜版纸。
本发明采取的技术方案如下：
一种高松厚度高光泽双面铜版纸的抄造方法，包括以下步骤：
1)备浆：选用碱性过氧化氢机械浆，采用疏解机对浆料进行散浆处理，制得游离度为300～400ml，松厚度≥3.0cm 3/g的浆料；将漂白硫酸盐阔叶木浆、漂白硫酸盐针叶木浆和碱性过氧化氢机械浆按重量配比分别为50～60％、10～20％、30～40％，进行混合配浆；
2)湿端：浆料按步骤1)的配比进行混合后，按重量百分比添加10～14％研 磨碳酸钙；添加阳性淀粉6～8kg/t，浆料经过筛选净化后进入头箱；
3)夹网纸机：网部车速为1300～1400m/min，浆网速比为1.04～1.05；
4)前干燥：经过压榨之后的湿纸幅在前干燥阶段通过烘缸干燥形成未涂原纸，原纸定量在110～115g/m 2，其中水分为4～6％；
5)施胶：原纸在施胶辊上采用淀粉胶液进行两面施胶涂布，两面涂布量分别为1～4g/m 2；
6)底涂涂布：完成胶液涂布后的原纸，采用膜转移式涂布，进行底涂，底涂计量棒压力：上辊/下辊：1.5～1.7/1.5～1.7bar，涂布量为18～20g/m 2；底涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％的研磨碳酸钙100％、丁苯胶乳4～7％和生物胶乳10～15％，涂料固形份为62～66％，低剪切粘度为400～600cps；
7)中涂涂布：在步骤6)的基础上，采用刮刀涂布，进行中涂，涂布量单面10～12g/m 2，共涂布两面中涂，中涂刮刀压力40～55％之间(操作界面显示，通常理解为最大压力的40～55％)，刀角为30～40degree；中涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％的研磨碳酸钙100％、丁苯胶乳4～7％和生物胶乳5～8％，涂料固形份为62～66％，低剪切粘度为800～1000cps；
8)面涂涂布：在步骤7)的基础上，进行面涂涂布，涂布量单面9～12g/m 2，共涂布两面面涂，面涂刮刀压力40～55％之间，刀角为30～40degree；面涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>98％的研磨碳酸钙90～97％、1um粒径>90％瓷土3-5％、丁苯胶乳7～10％和生物胶乳1～3％，涂料固形份为68～70％，低剪切粘度为1200～1400cps；
9)压光：压光模式采用8nip，压光机采用2+4+7+9压区，压光温度150～180℃，线压为40～50kN/m。
优选的，步骤1)中，混浆前，漂白硫酸盐阔叶木浆和漂白硫酸盐针叶木浆分别进行散浆和磨浆，制得游离度为400～500ml，松厚度为1.25～1.35cm 3/g的浆料。
优选的，步骤1)中，混浆前，碱性过氧化氢机械浆只进行散浆不磨浆，疏解机进出口压力为：2.0～4.0bar。
优选的，步骤2)中，研磨碳酸钙中粒径小于2um的颗粒含量<65％，阳性淀粉的取代度为0.028～0.032。
优选的，步骤5)中，胶液由酶切淀粉制备，固含为10％，粘度为25cps。
优选的，中涂第一次涂布刮刀压力为：42％，刀角为40degree，第二次涂布刮刀压力为45％，刀角为40degree。
优选的，面涂第一次涂布刮刀压力为：38％，刀角为35degree，第二次涂布刮刀压力为40％，刀角为35degree。
优选的，步骤9)中，2压区和4压区的压光温度为150℃，7压区和9压区的压光温度为180℃，线压为40～50kN/m。
通过本发明方法，成功抄造出一种高松厚、高光泽度、高平滑度和良好弯曲挺度的双面铜版纸。
与现有技术相比，本发明的有益效果是：
本发明通过浆料选型，采用100％高松厚度(松厚度在3.0cm 3/g以上)的碱性过氧化氢机械浆，并严格控制其用量，使之与其他浆料(硫酸盐针叶木浆、漂白硫酸盐阔叶木浆)保持合适配比，同时为了维持碱性过氧化氢机械浆的松厚度，本发明在备浆阶段不进行磨浆，而只是采用疏解机对浆料进行散浆处理，使浆料游离度在350ml左右，以保证浆料的松厚度≥3.0cm 3/g，保证原纸松厚度及粗糙度等满足要求，并采用特有的涂料配方，基于单层夹网原纸抄造，在车速高达1300m/min的高速纸机上，采用独有的MSP(双面上涂)+刮刀涂布工艺进行多层涂布，调整各涂布头的刀压、刀角等参数，使得最终抄造的成纸定量为170g/m 2左右，松厚度大于1cm 3/g，光泽度60～70％，平滑度大于600s，弯曲挺度大于2.4mNm。可见，本发明运用高速夹网纸机，通过浆料、涂布设计、涂布工艺和压光工艺的配合，成功抄造出一种高松厚、高光泽度、高平滑度和良好弯曲挺度的铜版纸。
本发明还发现，采用不同的刮刀压力和刀角，不同压光温度和线压，可进一步提高光泽度、平滑度和弯曲挺度。
具体实施方式
下面通过具体实施方式对本发明作进一步详细说明。
本发明实施例所用的实验方法如无特殊说明，均为常规方法。
本发明实施例所用的材料、试剂等，如无特殊说明，均可从商业途径得到。
实施例1
一种高松厚度高光泽双面铜版纸的抄造方法，包括以下步骤：
1)备浆：选用碱性过氧化氢机械浆，采用疏解机(疏解机进出口压力为：2.0～4.0bar)对浆料进行散浆处理，制得游离度为300ml，松厚度为3.1cm 3/g的浆料；漂白硫酸盐阔叶木浆进行散浆和磨浆，制得游离度为400ml，松厚度为1.26cm 3/g的浆料；漂白硫酸盐针叶木浆进行散浆和磨浆，制得游离度为405ml，松厚度为1.25cm 3/g的浆料；将漂白硫酸盐阔叶木浆、漂白硫酸盐针叶木浆和碱性过氧化氢机械浆按重量配比分别为50％、10％、40％，进行混合配浆；
2)湿端：浆料按步骤1)的配比进行混合后，按重量百分比添加14％研磨碳酸钙(粒径小于2um的颗粒含量<65％)；添加阳性淀粉(取代度为0.028)6kg/t，浆料经过筛选净化后进入头箱；
3)夹网纸机：夹网纸机包含头箱、成型网、压榨部，浆料由湿端流送系统送入头箱，然后喷射在夹网上脱水成形，在压榨部进一步脱水。网部车速为1300m/min，浆网速比为1.04；
4)前干燥：经过压榨之后的湿纸幅在前干燥阶段通过烘缸干燥形成未涂原纸，原纸定量在110g/m 2，其中水分为6.0％；
5)施胶：原纸在施胶辊上采用淀粉胶液进行两面施胶涂布，两面涂布量分别为1.0g/m 2；胶液由酶切淀粉制备，固含为12％，粘度为30cps；
6)底涂涂布：完成胶液涂布后的原纸，采用膜转移式涂布，进行底涂，底涂计量棒压力：上辊/下辊：1.5/1.7bar，涂布量为18g/m 2；底涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳4％和生物胶乳10％，涂料固形份为66％，低剪切粘度为600cps；
7)中涂涂布：在步骤6)的基础上，采用刮刀涂布，进行中涂，涂布量单面10～11g/m 2，共涂布两面中涂，中涂刮刀压力40％，刀角为30degree，两次涂布量合计20.7g/m 2；中涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳4％和生物胶乳5％，涂料固形份 为62％，低剪切粘度为800cps；
8)面涂涂布：在步骤7)的基础上，进行面涂涂布，涂布量单面9～10g/m 2，共涂布两面面涂，面涂刮刀压力40％，刀角为30degree，两次涂布量合计18.9g/m 2；面涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>98％研磨碳酸钙90％、粒径小于1um的颗粒含量>90％瓷土3％、丁苯胶乳7％和生物胶乳1％，涂料固形份为68％，低剪切粘度为1200cps；
9)压光：采用福伊特超级压光机Janus Calender MK2，压光模式采用8nip，压光机采用2+4+7+9压区，压光温度150℃，线压为50kN/m。
实施例2
一种高松厚度高光泽双面铜版纸的抄造方法，包括以下步骤：
1)备浆：选用碱性过氧化氢机械浆，采用疏解机(疏解机进出口压力为：2.0～4.0bar)对浆料进行散浆处理，制得游离度为400ml，松厚度为3.3cm 3/g的浆料；漂白硫酸盐阔叶木浆进行散浆和磨浆，制得游离度为500ml，松厚度为1.35cm 3/g的浆料；漂白硫酸盐针叶木浆进行散浆和磨浆，制得游离度为500ml，松厚度为1.33cm 3/g的浆料；将漂白硫酸盐阔叶木浆、漂白硫酸盐针叶木浆和碱性过氧化氢机械浆按重量配比分别为60％、20％、30％，进行混合配浆；
2)湿端：浆料按步骤1)的配比进行混合后，按重量百分比添加10％研磨碳酸钙(粒径小于2um的颗粒含量<65％)；添加阳性淀粉(取代度为0.032)8kg/t，浆料经过筛选净化后进入头箱；
3)夹网纸机：网部车速为1400m/min，浆网速比为1.05；
4)前干燥：经过压榨之后的湿纸幅在前干燥阶段通过烘缸干燥形成未涂原纸，原纸定量在115g/m 2，其中水分为5.2％；
5)施胶：原纸在施胶辊上采用淀粉胶液进行两面施胶涂布，两面涂布量分别为4.0g/m 2；胶液由酶切淀粉制备，固含为12％，粘度为30cps；
6)底涂涂布：完成胶液涂布后的原纸，采用膜转移式涂布，进行底涂，底涂计量棒压力：上辊/下辊：1.7/1.5bar，涂布量为20g/m 2；底涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳7％和生物胶乳15％，涂料固形份为62％，低剪切粘度为400cps；
7)中涂涂布：在步骤6)的基础上，采用刮刀涂布，进行中涂，涂布量单面11～12g/m 2，共涂布两面中涂，中涂刮刀压力55％，刀角为30degree，两次涂布量合计22.8g/m 2；中涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳7％和生物胶乳8％，涂料固形份为66％，低剪切粘度为1000cps；
8)面涂涂布：在步骤7)的基础上，进行面涂涂布，涂布量单面11～12g/m 2，共涂布两面面涂，面涂刮刀压力55％之间，刀角为40degree，两次涂布量合计23.5g/m 2；面涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>98％研磨碳酸钙97％、粒径小于1um的颗粒含量>90％瓷土5％、丁苯胶乳10％和生物胶乳3％，涂料固形份为70％，低剪切粘度为1400cps；
9)压光：采用福伊特超级压光机Janus Calender MK2，压光模式采用8nip，压光机采用2+4+7+9压区，压光温度180℃，线压为40kN/m。
实施例3
一种高松厚度高光泽双面铜版纸的抄造方法，包括以下步骤：
1)备浆：选用碱性过氧化氢机械浆，采用疏解机(疏解机进出口压力为：2.0～4.0bar)对浆料进行散浆处理，制得游离度为400ml，松厚度为3.3cm 3/g的浆料；漂白硫酸盐阔叶木浆进行散浆和磨浆，制得游离度为500ml，松厚度为1.35cm 3/g的浆料；漂白硫酸盐针叶木浆进行散浆和磨浆，制得游离度为500ml，松厚度为1.33cm 3/g的浆料；将漂白硫酸盐阔叶木浆、漂白硫酸盐针叶木浆和碱性过氧化氢机械浆按重量配比分别为53％、12％、35％，进行混合配浆；
2)湿端：浆料按步骤1)的配比进行混合后，按重量百分比添加13％研磨碳酸钙(粒径小于2um的颗粒含量<65％)；添加阳性淀粉(取代度为0.028～0.032)7kg/t，浆料经过筛选净化后进入头箱；
3)夹网纸机：网部车速为1350m/min，浆网速比为1.04；
4)前干燥：经过压榨之后的湿纸幅在前干燥阶段通过烘缸干燥形成未涂原纸，原纸定量在110g/m 2，其中水分为4.7％；
5)施胶：原纸在施胶辊上采用淀粉胶液进行两面施胶涂布，两面涂布量分别为2.3g/m 2；胶液由酶切淀粉制备，固含为10％，粘度为25cps；
6)底涂涂布：完成胶液涂布后的原纸，采用膜转移式涂布，进行底涂，底涂计量棒压力：上辊/下辊：1.61/1.63bar，涂布量为18g/m 2；底涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳4％和生物胶乳12％，涂料固形份为66％，低剪切粘度为500cps；
7)中涂涂布：在步骤6)的基础上，采用刮刀涂布，进行中涂，涂布量单面10～11g/m 2，共涂布两面中涂，中涂刮刀压力40％，刀角为40degree，两次涂布量合计21.5g/m 2；中涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳5％和生物胶乳7％，涂料固形份为63％，低剪切粘度为900cps；
8)面涂涂布：在步骤7)的基础上，进行面涂涂布，涂布量单面10～11g/m 2，共涂布两面面涂，面涂刮刀压力40％之间，刀角为40degree，两次涂布量合计20.3g/m 2；面涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>98％研磨碳酸钙97％、粒径小于1um的颗粒含量>90％瓷土3％、丁苯胶乳8％和生物胶乳2％，涂料固形份为69％，低剪切粘度为1300cps；
9)压光：采用福伊特超级压光机Janus Calender MK2，压光模式采用8nip，压光机采用2+4+7+9压区，压光温度180℃，线压为50kN/m。
实施例4
实施例4与实施例3的主要区别是：
中涂第一次涂布刮刀压力为：42％，刀角为40degree，第二次涂布刮刀压力为45％，刀角为40degree。
面涂第一次涂布刮刀压力为：38％，刀角为35degree，第二次涂布刮刀压力为40％，刀角为35degree。
实施例5
实施例5与实施例4的主要区别是：
步骤9)中，2压区和4压区的压光温度为150℃，线压为50kN/m；7压区和9压区的压光温度为180℃，线压为40kN/m。
对比例1
一种高松厚度高光泽双面铜版纸的抄造方法，包括以下步骤：
1)备浆：选用碱性过氧化氢机械浆，采用疏解机(疏解机进出口压力为：2.0～4.0bar)对浆料进行散浆处理，制得游离度为400ml，松厚度为3.3cm 3/g的浆料；漂白硫酸盐阔叶木浆进行散浆和磨浆，制得游离度为500ml，松厚度为1.35cm 3/g的浆料；漂白硫酸盐针叶木浆进行散浆和磨浆，制得游离度为500ml，松厚度为1.33cm 3/g的浆料；将漂白硫酸盐阔叶木浆、漂白硫酸盐针叶木浆和碱性过氧化氢机械浆按重量配比分别为53％、12％、35％，进行混合配浆；
2)湿端：浆料按步骤1)的配比进行混合后，按重量百分比添加13％研磨碳酸钙(粒径小于2um的颗粒含量<65％)；添加阳性淀粉(取代度为0.028～0.032)7kg/t，浆料经过筛选净化后进入头箱；
3)夹网纸机：网部车速为1350m/min，浆网速比为1.04；
4)前干燥：经过压榨之后的湿纸幅在前干燥阶段通过烘缸干燥形成未涂原纸，原纸定量在110g/m 2，其中水分为4.7％；
5)施胶：原纸在施胶辊上采用淀粉胶液进行两面施胶涂布，两面涂布量分别为2.3g/m 2；胶液由酶切淀粉制备，固含为10％，粘度为25cps；
6)底涂涂布：完成胶液涂布后的原纸，采用膜转移式涂布，进行底涂，底涂计量棒压力：上辊/下辊：1.61/1.63bar，涂布量为15.6g/m 2；底涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳3.5％和生物胶乳12％，涂料固形份为66％，低剪切粘度为500cps；
7)中涂涂布：在步骤6)的基础上，采用刮刀涂布，进行中涂，涂布量单面10～12g/m 2，共涂布两面中涂，中涂刮刀压力40％，刀角为40degree，两次涂布量合计22.6g/m 2；中涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％研磨碳酸钙100％、丁苯胶乳3％和生物胶乳7％，涂料固形份为64％，低剪切粘度为900cps；
8)面涂涂布：在步骤7)的基础上，进行面涂涂布，涂布量单面9～12g/m 2，共涂布两面面涂，面涂刮刀压力40％之间，刀角为40degree，两次涂布量合计21.5g/m 2；面涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>98％研磨碳酸钙97％、粒径小于1um的颗粒含量>90％瓷土7％、丁苯胶乳8％和生物胶乳2％，涂料固形份为69％，低剪切粘度为1300cps；
9)压光：采用福伊特超级压光机Janus Calender MK2，压光模式采用8nip，压光机采用2+4+7+9压区，压光温度180℃，线压为50kN/m。
对比例2
对比例2与实施例3的主要区别是：
步骤1)备浆：取漂白硫酸盐阔叶木浆、硫酸盐针叶木浆、碱性过氧化氢机械浆、漂白化学热磨机械浆，按重量比77％：9％：7％：7％，在混合管中进行混合配浆。漂白硫酸盐阔叶木浆打浆后游离度在410ml，松厚度在1.3cm 3/g；硫酸盐针叶木浆打浆后游离度在400ml，松厚度在1.3cm 3/g；碱性过氧化氢机械浆和漂白化学热磨机械浆混合打浆后游离度在360ml，松厚度在2.8cm 3/g。
试验例：
对实施例、对比例所得双面铜版纸进行性能测试，结果见表1。
表1
Figure PCTCN2020085446-appb-000001
从表1可知，本发明方案抄造的铜版纸的松厚度都大于1cm 3/g，光泽度60～70％，平滑度大于600s，弯曲挺度大于2.4mNm。对比例1～2抄造的铜版纸松厚度都小于1cm 3/g，且光泽度、平滑度和弯曲挺度均差于实施例。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换。

Claims (9)

  1. 一种高松厚度高光泽双面铜版纸的抄造方法，其特征在于，包括以下步骤：
    1)备浆：选用碱性过氧化氢机械浆，采用疏解机对浆料进行散浆处理，制得游离度为300～400ml，松厚度≥3.0cm 3/g的浆料；将漂白硫酸盐阔叶木浆、漂白硫酸盐针叶木浆和碱性过氧化氢机械浆按重量配比分别为50～60％、10～20％、30～40％，进行混合配浆；
    2)湿端：浆料按步骤1)的配比进行混合后，按重量百分比添加10～14％研磨碳酸钙；添加阳性淀粉6～8kg/t；浆料经过筛选净化后进入头箱；
    3)夹网纸机：网部车速为1300～1400m/min，浆网速比为1.04～1.05；
    4)前干燥：经过压榨之后的湿纸幅在前干燥阶段通过烘缸干燥形成未涂原纸，原纸定量在110～115g/m 2，其中水分为4～6％；
    5)施胶：原纸在施胶辊上采用淀粉胶液进行两面施胶涂布，两面涂布量分别为1～4g/m 2；
    6)底涂涂布：完成胶液涂布后的原纸，采用膜转移式涂布，进行底涂，底涂计量棒压力：上辊/下辊：1.5～1.7/1.5～1.7bar，涂布量为18～20g/m 2；底涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％的研磨碳酸钙100％、丁苯胶乳4～7％和生物胶乳10～15％，涂料固形份为62～66％，低剪切粘度为400～600cps；
    7)中涂涂布：在步骤6)的基础上，采用刮刀涂布，进行中涂，涂布量单面10～12g/m 2，共涂布两面中涂，中涂刮刀压力40～55％之间，刀角为30～40degree；中涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>65％的研磨碳酸钙100％、丁苯胶乳4～7％和生物胶乳5～8％，涂料固形份为62～66％，低剪切粘度为800～1000cps；
    8)面涂涂布：在步骤7)的基础上，进行面涂涂布，涂布量单面9～12g/m 2，共涂布两面面涂，面涂刮刀压力40～55％之间，刀角为30～40degree；面涂涂料包括以下成分，按重量百分比计：粒径小于2um的颗粒含量>98％的研磨碳酸钙90～97％、1um粒径>90％瓷土3-5％、丁苯胶乳7～10％和生物胶乳1～3％，涂料固形份为68～70％，低剪切粘度为1200～1400cps；
    9)压光：压光模式采用8nip，压光机采用2+4+7+9压区，压光温度150～180℃，线压为40～50kN/m。
  2. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，步骤1)中，混浆前，漂白硫酸盐阔叶木浆和漂白硫酸盐针叶木浆分别进行散浆和磨浆，制得游离度为400～500ml，松厚度为1.25～1.35cm 3/g的浆料。
  3. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，混浆前，碱性过氧化氢机械浆只进行散浆不磨浆，疏解机进出口压力为：2.0～4.0bar。
  4. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，步骤2)中，研磨碳酸钙中粒径小于2um的颗粒含量<65％，阳性淀粉的取代度为0.028～0.032。
  5. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，步骤5)中，胶液由酶切淀粉制备，固含为10％，粘度为25cps。
  6. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，中涂第一次涂布刮刀压力为：42％，刀角为40degree，第二次涂布刮刀压力为45％，刀角为40degree。
  7. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，面涂第一次涂布刮刀压力为：38％，刀角为35degree，第二次涂布刮刀压力为40％，刀角为35degree。
  8. 根据权利要求1所述的高松厚度高光泽双面铜版纸的抄造方法，其特征在于，步骤9)中，2压区和4压区的压光温度为150℃，7压区和9压区的压光 温度为180℃，线压为40～50kN/m。
  9. 一种高松厚度高光泽双面铜版纸，其特征在于，通过权利要求1～8任一项所述的抄造方法制得。
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