CN102268836B - Method for making slight-coating light paper - Google Patents
Method for making slight-coating light paper Download PDFInfo
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- CN102268836B CN102268836B CN2011102098119A CN201110209811A CN102268836B CN 102268836 B CN102268836 B CN 102268836B CN 2011102098119 A CN2011102098119 A CN 2011102098119A CN 201110209811 A CN201110209811 A CN 201110209811A CN 102268836 B CN102268836 B CN 102268836B
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Abstract
The invention discloses a method for making slight-coating light paper. The method comprises the following processing steps of: beating by using kraft pulp, Italian poplar alkaline peroxide mechanical pulp, chemi-thermo-mechanical pulp and waste paper deinked pulp, respectively, blending and adding auxiliary materials, making wet paper sheets, pre-drying, slightly coating, post-drying, press-polishing and finishing. According to the method disclosed by the invention, by the treatment way of coating the surface of the light paper slightly, not only are the quality performances, such as, whiteness, surface smoothness, printing suitability and the like, of the light paper increased greatly, but ash content of the light paper after coating is increased greatly also, so that energy consumption is saved and production cost is reduced; the method disclosed by the invention has the obvious advantages, and has very important meanings to increase of additional values of high-yield chemi-thermo-mechanical pulp and light paper products, to improvement of quality of the products, and to reduction of production cost.
Description
Technical field
The present invention relates to a kind of manufacturing approach of micro-coating light-weight paper, belong to pulp technology for making paper.
Background technology
Light paper is a light offset paper, has that color and luster is soft naturally, big (bulk generally is not less than 1.5cm to bulk
3/ g), characteristics such as opacity height.In recent years, more domestic top-quality books such as literature classics, world's masterpiece, social sciences elaboration, famous person's biography etc. adopted the light paper printing mostly.The books form and aspect of light paper printing are soft, clear picture, and books are read more easily; Third dimension is strong; Can reduce the fatigue of eyes, prevention students in middle and primary schools myopia is played a role, most suitable as student textbook and teaching material; Country publishes general administration and formally send the documents and require the printing of students in middle and primary schools' textbook employing light paper, and promotes the use of in national emphasis provinces and cities.Light paper has bright development prospect as books with paper.
Outstanding feature of light paper is that bulk is big; This just determined to join copy light paper slurry when having the certain intensity characteristic; Higher light scattering property and bulk must be arranged; The light paper of China's papermaking enterprise production at present adopts bulk mostly, and good high yield chemi-mechanical pulp joins copies; Lignin content is high, whiteness is low, fiber fines combines difficulty (hydrogen bond is few), filler to keep characteristics such as relatively poor but chemi-mechanical pulp exists, and there are problems such as whiteness is low, the slurry consumption is high, profile pattern is poor, easy hair and powder dropping in the feasible light paper of producing, has influenced the further lifting of product quality and selling price.
Summary of the invention
The manufacturing approach that the purpose of this invention is to provide a kind of micro-coating light-weight paper; Include and use that sulfate wood pulp, italian poplar APMP, CTMP, pulp from decoloured waste paper add through pulling an oar, join slurry and auxiliary material respectively, the l Water Paper page or leaf is manufactured paper with pulp, preceding drying, trace coating, after drying, press polish finishing process step, it is characterized in that:
(1) slurry weight proportioning sulfate wood pulp: italian poplar APMP: CTMP: pulp from decoloured waste paper is (0 ~ 10): (10 ~ 30): (40 ~ 80): (0 ~ 30);
(2) beating degree behind the slurry pulping: 35 ~ 45 ° of SR of sulfate wood pulp; 48 ~ 68 ° of SR of italian poplar APMP; 55 ~ 75 ° of SR of CTMP; 42 ~ 52 ° of SR of pulp from decoloured waste paper;
(3) auxiliary material to the oven dry stock consumption is: (a) sizing agent alkyl ketene dimer weight ratio 0.1 ~ 0.2%; (b) filler weight is than 15 ~ 20%; (c) the cationic starch weight ratio 0.8 ~ 1.2%, retention agent polyacrylamide 200 ~ 300ppm, bentonite weight ratio 0.2 ~ 0.4%;
(4) micro-each component of coating composition prescription by weight: CaCO
3100 parts, 0 ~ 5 part in latex, 20 ~ 50 parts of starch, 0 ~ 2 part in brightening agent, 0 ~ 2 part of reinforcing agent; Coating solid content 10 ~ 30%;
(5) micro-coating condition: nip pressure: transmission side/fore side: (18 ~ 25)/(18 ~ 25) kN/m, gauge stick moulding pressure: top roll/lower roll: 0.8 ~ 1.5/0.8 ~ 1.5bar, coating weight: 3 ~ 8g/m2;
(6) rolling condition: 60 ~ 100 ℃ of temperature, pressure 70 ~ 120kN/m;
(7) the light-duty printing paper that makes quantitatively is 55.0 ~ 80.0g/m2, and moisture is 6.0 ~ 8.0%, and whiteness (ISO) is greater than 75%, and opacity is greater than 85%, and bulk is not less than 1.6m
3/ kg, the surface absorbs weight less than 28g/m2, and the fracture length roll web is vertically greater than 3200m, and laterally folding strength is greater than 5 times, and the lateral extensometer shrinkage is less than 3.0%, and print surface intensity is not less than 1.5m/s.
The present invention not only can effectively improve capability and performances such as light paper whiteness, profile pattern, printability through the processing mode of light paper being carried out surface trace coating; And can significantly improve the light paper ash content after the coating, thus practice thrift consumption reduction, reduce production costs; Has remarkable advantages; For improving high yield chemi-mechanical pulp and light paper added value of product, improve product quality, reducing production costs has crucial meaning.
The specific embodiment
Embodiment 1:
The satisfactory sulfate wood pulp of beating degree (35 ~ 45 ° of SR), italian poplar APMP (48 ~ 68 ° of SR), CTMP (55 ~ 75 ° of SR), four kinds of slurries of pulp from decoloured waste paper (42 ~ 52 ° of SR) are joined slurry according to the ratio of 5%:55%:25%:15% after will pulling an oar; Add 20% precipitated calcium carbonate filler afterwards, send into four sections hydrocyclones of one-level through fan pump and purify slagging-off, get into the degassing tank processing that outgases then; Get into pressurized screen afterwards and carry out Screening Treatment (cationic PAM consumption 0.3kg/t paper, cationic starch 10kg/t paper, sizing agent alkyl ketene dimer 1.5kg/t paper are added in the pressurized screen inlet, and modification infusorial earth 3.5kg/t paper is added in the pressurized screen outlet); Send into the head box online then, regulate the online flow, the control page quantification is at 60g/m
2Between; The entering press section carried out five rollers, three nip unipress after the l Water Paper page or leaf went out wet end, squeezed to mass dryness fraction>=39% back and got into preceding drying section; Surface temperature of drier is controlled at 90 ~ 130 ° of C page is carried out dried, to web dryness>=92%; Get into size press and carry out micro-coating surface processing: press CaCO
3100 parts, 2 parts in latex, 30 parts of starch, 1 part in brightening agent, the coating of 1 part of preparation of reinforcing agent solid content 20% stirs, and adopts metering bar type surface size press that the page that the past drying section gets into is carried out micro-coated, control coating weight 6g/m
2, go out surface size press then, get into the back dried; It is dry that the l Water Paper page or leaf of crossing through the top sizing advanced treating is proceeded the back, and the control dryer temperature goes out back drying section web dryness>=93% at 40 ~ 130 ℃; The page that drying section gets into from the back gets into the press polish district, page is carried out press polish handle, and calendering temperature is controlled at 60 ~ 120 ℃, and the press polish Pressure control is at 70 ~ 120kN/m; Through after the press polish, paper is batched, can obtain whiteness>=75%ISO, bulk>=1.6m
3/ kg, surface strength>=1.5m/s, and the micro-coating light-weight paper that profile pattern is good, printing performance is good.
Embodiment 2:
The satisfactory italian poplar APMP of beating degree (48 ~ 68 ° of SR), two kinds of slurries of CTMP (55 ~ 75 ° of SR) are joined slurry according to the ratio of 70%:30% after will pulling an oar; Add 20% precipitated calcium carbonate filler afterwards, send into four sections hydrocyclones of one-level through fan pump and purify slagging-off, get into the degassing tank processing that outgases then; Get into pressurized screen afterwards and carry out Screening Treatment (cationic PAM consumption 0.3kg/t paper and cationic starch 8kg/t paper, sizing agent alkyl ketene dimer 1.5kg/t paper are added in the pressurized screen inlet, and modification infusorial earth 3.5kg/t paper is added in the pressurized screen outlet); Send into the head box online then, regulate the online flow, the control page quantification is at 60g/m
2Between; The entering press section carried out five rollers, three nip unipress after the l Water Paper page or leaf went out wet end, squeezed to mass dryness fraction>=39% back and got into preceding drying section; Surface temperature of drier is controlled at 90 ~ 130 ° of C page is carried out dried, to web dryness>=92%; Get into size press and carry out micro-coating surface processing: press CaCO
3100 parts, 1 part in latex, 35 parts of starch, 1 part in brightening agent, the coating of 1 part of preparation of reinforcing agent solid content 18% stirs, and adopts metering bar type surface size press that the page that the past drying section gets into is carried out micro-coated, control coating weight 5g/m
2, go out surface size press then, get into the back dried; It is dry that the l Water Paper page or leaf of crossing through the top sizing advanced treating is proceeded the back, and the control dryer temperature goes out back drying section web dryness>=93% at 40 ~ 130 ℃; The page that drying section gets into from the back gets into the press polish district, page is carried out press polish handle, and calendering temperature is controlled at 60 ~ 120 ℃, and the press polish Pressure control is at 70 ~ 120kN/m; Through after the press polish, paper is batched, can obtain whiteness>=75%ISO, bulk>=1.6m
3/ kg, surface strength>=1.5m/s, and the micro-coating light-weight paper that profile pattern is good, printing performance is good.
Instance 3:
The satisfactory italian poplar APMP of beating degree (48 ~ 68 ° of SR), CTMP (55 ~ 75 ° of SR), three kinds of slurries of pulp from decoloured waste paper (42 ~ 52 ° of SR) are joined slurry according to the ratio of 45%:25%:30% after will pulling an oar; Add 20% precipitated calcium carbonate filler afterwards, send into four sections hydrocyclones of one-level through fan pump and purify slagging-off, get into the degassing tank processing that outgases then; Get into pressurized screen afterwards and carry out Screening Treatment (cationic PAM consumption 0.3kg/t paper and cationic starch 11kg/t paper, sizing agent alkyl ketene dimer 1.5kg/t paper are added in the pressurized screen inlet, and modification infusorial earth 3.5kg/t paper is added in the pressurized screen outlet); Send into the head box online then, regulate the online flow, the control page quantification is at 60g/m
2Between; The entering press section carried out five rollers, three nip unipress after the l Water Paper page or leaf went out wet end, squeezed to mass dryness fraction>=39% back and got into preceding drying section; Surface temperature of drier is controlled at 90 ~ 130 ° of C page is carried out dried, to web dryness>=92%; Get into size press and carry out micro-coating surface processing: press CaCO
3100 parts, 0 part in latex, 40 parts of starch; 1 part in brightening agent, the coating of 1 part of preparation of reinforcing agent solid content 20% stirs; Adopt metering bar type surface size press that the page that the past drying section gets into is carried out micro-coated; Control coating weight 6g/m2 goes out surface size press then, gets into the back dried; It is dry that the l Water Paper page or leaf of crossing through the top sizing advanced treating is proceeded the back, and the control dryer temperature goes out back drying section web dryness>=93% at 40 ~ 130 ℃; The page that drying section gets into from the back gets into the press polish district, page is carried out press polish handle, and calendering temperature is controlled at 60 ~ 120 ℃, and the press polish Pressure control is at 70 ~ 120kN/m; Through after the press polish, paper is batched, can obtain whiteness>=75%ISO, bulk>=1.6m
3/ kg, surface strength>=1.5m/s, and the micro-coating light-weight paper that profile pattern is good, printing performance is good.
Claims (1)
1. the manufacturing approach of a micro-coating light-weight paper; Comprise use that sulfate wood pulp, italian poplar APMP, CTMP, pulp from decoloured waste paper add through pulling an oar, join slurry and auxiliary material respectively, the l Water Paper page or leaf is manufactured paper with pulp, preceding drying, trace coating, after drying, press polish finishing process step, it is characterized in that:
(1) slurry weight proportioning sulfate wood pulp: italian poplar APMP: CTMP: pulp from decoloured waste paper is (0-10): (10-30): (40-80): (0-30);
(2) beating degree behind the slurry pulping: sulfate wood pulp 35-45 ° SR; 48-68 ° of SR of Italy's poplar APMP pulp; CTMP 55-75 ° SR; Pulp from decoloured waste paper 42-52 ° SR;
(3) auxiliary material to the oven dry stock consumption is: (a) sizing agent alkyl ketene dimer weight ratio 0.1-0.2%; (b) filler weight compares 15-20%; (c) cationic starch weight ratio 0.8-1.2%, retention agent polyacrylamide 200-300ppm, bentonite weight ratio 0.2-0.4%;
(4) micro-each component of coating composition prescription by weight: CaCO
3100 parts, latex 0-5 part, starch 20-50 part, brightening agent 0-2 part, reinforcing agent 0-2 part; Coating solid content 10-30%;
(5) micro-coating condition: nip pressure: transmission side/fore side: (18-25)/(18-25) kN/m, gauge stick moulding pressure: top roll/lower roll: 0.8-1.5/0.8-1.5bar, coating weight: 3-8g/m
2
(6) rolling condition: temperature 60-100 ℃, pressure 70-120kN/m;
(7) the light-duty printing paper that makes quantitatively is 55.0-80.0g/m
2, moisture is 6.0-8.0%, and whiteness ISO is greater than 75%, and opacity is greater than 85%, and bulk is not less than 1.60m
3/ kg, the surface absorbs weight less than 28g/m
2, the fracture length roll web is vertically greater than 3200m, and laterally folding strength is greater than 5 times, and the lateral extensometer shrinkage is less than 3.0%, and print surface intensity is not less than 1.5m/s.
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| CN2011102098119A CN102268836B (en) | 2011-07-26 | 2011-07-26 | Method for making slight-coating light paper |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102704345B (en) * | 2012-06-18 | 2014-07-23 | 岳阳林纸股份有限公司 | Method for making trace coated offset paper |
| CN102926288A (en) * | 2012-11-01 | 2013-02-13 | 福建省晋江优兰发纸业有限公司 | Thin paper made of high yield pulp and making process thereof |
| CN104831578A (en) * | 2015-04-20 | 2015-08-12 | 岳阳林纸股份有限公司 | Preparation method of high-grade thermosensitive base paper |
| CN104947498B (en) * | 2015-06-30 | 2017-05-24 | 广西科技大学 | Lightweight paper made from high-proportion bamboo pulp and making method of lightweight paper |
| CN105220562B (en) * | 2015-09-29 | 2018-01-19 | 河南江河纸业股份有限公司 | A kind of micro- painting wood-free paper produced using reducing rules at high proportion and its production method |
| CN106868927B (en) * | 2017-01-24 | 2019-04-09 | 杭州科翼科技有限公司 | A kind of environment protecting paper for protecting eyesight |
| CN107059462A (en) * | 2017-05-23 | 2017-08-18 | 岳阳林纸股份有限公司 | A kind of micro- manufacture method for applying offset paper of high bulk |
| CN109468880A (en) * | 2018-10-16 | 2019-03-15 | 齐鲁工业大学 | A kind of preparation method of high bulky telegraphy paper |
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| CN1307153A (en) * | 2000-01-27 | 2001-08-08 | 山东晨鸣纸业集团股份有限公司 | Production process of high-grade featherweight coated paper |
| CN1584205A (en) * | 2004-05-28 | 2005-02-23 | 岳阳纸业股份有限公司 | Special pigment finishing offset paper and producing method thereof |
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