CN105200846B - A kind of calcium silicates is filled with neutral sizing and preparation method thereof - Google Patents
A kind of calcium silicates is filled with neutral sizing and preparation method thereof Download PDFInfo
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Abstract
Neutral sizing and preparation method thereof is filled with the present invention relates to a kind of calcium silicates, the preparation method is included in raw material slurry and carries out mixing mashing with calcium silicate filling material and auxiliary material, obtains mixed slurry；Wet end dehydration, copy paper, preceding drying, top sizing, rear drying, the processing step of press polish ornamenting are sequentially passed through, calcium silicates is obtained and is filled with neutral sizing.The preparation method substitutes non-renewable calcium carbonate by the use of the calcium silicates extracted in flyash solid slag and is used as filler; raw material sources are abundant, cheap; the comprehensive utilization of solid waste is not only realized, also environmental protection, saving fibrous raw material, and the product quality of neutral sizing can be substantially improved.Neutral sizing is filled with using calcium silicates made from preparation method of the present invention, has the advantages that intensity is good, deflection is high, surface is smooth fine and smooth relative to the neutral sizing that calcium carbonate is filled with.
Description
Technical field
Neutral sizing and preparation method thereof is filled with the present invention relates to a kind of calcium silicates, belongs to pulp technology for making paper.
Background technology
Release liners, also referred to as separate paper, silicone oil paper, release liners generally have double-decker：First layer is as base material
Neutral sizing, the second layer is release coating.The general manufacture method of release liners is to be pre-processed the surface of neutral sizing
One layer of priming coat is applied, mould release is coated and is solidified into release coating, be finally made release liners.
Neutral sizing is the important paper base material for preparing release liners, has been widely used for light industry, household electrical appliances, mother and child care
In terms of articles for use, such as self-adhesive label base stock, self-adhesion decorating film base stock, artificial leather backing layer paper, self-adhesion carpet brick, sound-absorbing material, absolutely
Edge material etc., current release liners are just incremented by with 8-10% year rate of rise.
Neutral sizing is largely fixed the quality of final products as the base material of release liners；Neutral sizing requirement
Intensity is high, dimensional stability is good, deflection is good, not hair and powder dropping, with certain smoothness (front), mustn't have broken hole, hard block, gas
Spot and deadfold paper defects, post-processing plyability are good etc..Generally using masson pine, drift in current neutral sizing production technology
White straw pulp be filled with main fibrous raw material, slurry using calcium carbonate, alkyl ketene dimer (AKD) neutral sizing, it is follow-up to pass through
The neutral sizing of different class is obtained after surface finish processing.For the smooth exquisiteness in the surface for lifting neutral sizing, improve shape
Stability, while being to produce one of important procedure of neutral sizing to reduce calcium carbonate in production cost, slurry and be filled with.However, from
Calcium carbonate, which is filled with, in the production of type body paper can cause a series of problems, and such as fiber retention is low, machine water concentration high, paper strength
Big, the easy hair and powder dropping of loss, deflection is poor, paper machine equipment is worn away high.On the other hand, the raw material resources of calcium carbonate are limited, use
In being filled with for release liners, also cause production cost hardly possible control.
How a kind of abundance is found, material with low cost is as filler, while can lift neutral sizing again
Product quality is always people's urgent problem to be solved.
The content of the invention
Technical problem underlying solved by the invention, is to provide the preparation method that a kind of calcium silicates is filled with neutral sizing,
Substitute non-renewable calcium carbonate as filler with calcium silicates, not only can with environmental protection, save fibrous raw material, and can be big
Width lifts the product quality of neutral sizing.
Present invention also offers be filled with neutral sizing using calcium silicates made from the preparation method.
The invention provides the preparation method that a kind of calcium silicates is filled with neutral sizing, comprise the following steps：
1) carry out mixing mashing with calcium silicate filling material and auxiliary material in raw material slurry, be configured to mixed slurry；Wherein, the silicon
The average grain diameter of sour calcium is 20-40um, and whiteness >=85%ISO, the pH value of 10% suspension is 8.0-9.5；Calcium silicates relative to
The consumption of over dry raw material slurry is：10-30%；
2) mixed slurry is sequentially passed through into wet end dehydration, squeezing, preceding drying, into top sizing treatment process, obtained
To the page after top sizing is handled；
3) page after top sizing is handled, order is dried after carrying out, press polish ornamenting process, obtains calcium silicates
It is filled with neutral sizing.
The calcium silicates used in the preparation method for the neutral sizing that the present invention is provided, is to select silicic acid respectively based on inventor
Calcium and research of the calcium carbonate as the various performances of filler：Calcium carbonate, which does filler, in neutral sizing production can cause that retention is low, net
Lower white water consistency is high, and paper strength loses big, easy hair and powder dropping, and deflection is poor, a series of problems, such as high to the abrasion of paper machine equipment；Silicon
Sour calcium is that a kind of good dispersion, real density be small, dimensionally stable cellular mineral material, and research of the invention is found, using silicon
The neutral sizing that sour calcium does filler production has retention high, and paper strength is good, and bulk is high, paper light basis weight, is more conducive to
Guarantee paper press polish ornamenting is good, surface is smoothly fine and smooth, and calcium silicates can be extracted from flyash solid slag, for giving birth to
This kind of high value added product of neutral sizing is produced, the comprehensive utilization of solid waste can be more realized.
The present invention prepares calcium silicates and is filled with the technique of neutral sizing, the fibrous raw material bag that raw materials used slurry can be selected
Include in bleached sulphate softwood pulp and BRATSK, Italy APMP slurries and bleached sulfate reed pulp at least
A kind of mixture of formation.
In specific embodiments of the present invention, the weight ratio of the fibrous raw material is as follows：Bleached sulphate softwood pulp,
BRATSK, Italy APMP slurries and bleached sulfate reed pulp (5-50)：(0-95)：(0-40)：(0-40).
Further, it is as the beating degree of fibrous raw material in raw material slurry：45-55 ° of bleached sulphate softwood pulp
SR；35-40 ° of SR of BRATSK；Italian APMP starches 50-60 ° of SR；35-40 ° of SR of bleached sulfate reed pulp, more
Beneficial to the quality and performance of lifting neutral sizing.
In the present invention, the auxiliary material can include two in sizing agent, cationic starch, retention agent, bentonite and brightening agent
More than kind.The research of inventor is found, is beneficial to improve fiber retention using two or more auxiliary materials.
In specific embodiments of the present invention, the auxiliary material is controlled to be relative to the consumption of over dry raw material slurry：Sizing agent
0.1-0.3%, cationic starch 0.6-1.2%, retention agent 0.05-0.1%, bentonite 0.2-0.5%, brightening agent 0.2-0.6%.
Further, sizing agent can be alkyl ketene dimer (AKD) and/or alkenyl succinic anhydride (ASA).In this hair
In bright specific embodiment, selection alkenyl succinic anhydride (ASA) or alkyl ketene dimer (AKD) are as sizing agent, in list
It is more difficult when solely using to keep on fiber, cationic starch can be added to improve sizing agent keeping on fiber.In addition, positive
Ionic starch and sizing agent synergy, paper strength can also be improved while sizing efficiency is improved.
Further, the retention agent in assistant agent can select PAMC (CPAM) and/or anion poly- third
Acrylamide (APAM).PAMC can be used alone as retention agent, also can constitute Microparticle Retention System with bentonite；Separately
Outside because PAMA is negatively charged in itself, and some cationic compounds composition compound system can play stronger
Retention, so can also be that PAMC constitutes bi-component Microparticle Retention System with PAMA.
Further, bentonite can be modified alta-mud.
In the present invention, top sizing processing uses the surface being made up of starch derivatives and synthetic styrene-acrylic gluing reinforcing agent
Glue application solution；Wherein described surface size each component is relative to over dry page by weight：Starch derivatives 2.0-5.0%；Close
Into phenylpropyl alcohol gluing reinforcing agent 0.2-0.3%.
Further, the starch derivatives can be oxidized starch or enzyme converted starch.
Further, the solid content of the surface size is between 8.0-12.0%.
In specific embodiments of the present invention, the press polish ornamenting condition is：60-130 DEG C of temperature, pressure 80-
120kN/m。
The present invention's prepares the method that calcium silicates is filled with neutral sizing, and substituting non-renewable calcium carbonate using calcium silicates makees
For filler, calcium silicate filling material is added in raw material slurry and auxiliary material carries out mixing mashing, mixed slurry is made；Wherein, the silicon
The average grain diameter of sour calcium is 20-40um, whiteness >=85%ISO, the pH value 8.0-9.5 of 10% suspension；Calcium silicates is relative to exhausted
The consumption of dry-mixing raw material slurry is：10-30%；Mixed slurry is sequentially passed through into wet end dehydration, squeezing, preceding drying, into table
Face is glued treatment process, obtains the page after top sizing is handled；Dry, press polish ornamenting process after then order is carried out,
Obtain calcium silicates and be filled with neutral sizing.
Present invention also offers neutral sizing is filled with using calcium silicates made from the preparation method, it is filled with relative to calcium carbonate
Neutral sizing, had more that retention is high, paper strength is good, and bulk is high, paper light basis weight, and press polish ornamenting is good, table
The smooth exquisiteness in face, wears away low advantage.
Following index can be had by being filled with neutral sizing using calcium silicates made from the preparation method：Quantification of 60-120g/
m2, opacity >=90%, smoothness >=40s, transversal stretching rate≤2.5%, fracture length roll web longitudinal direction >=4000m, surface
Absorb weight (Cobb values) 20-30g/m2, moisture 4-6%, ash content 10-28%.
The present invention has the advantages that：
The present invention is filled with the method for neutral sizing preparing calcium silicates, it is possible to use extracted in flyash solid slag
Calcium silicates substitutes non-renewable calcium carbonate as filler, and raw material sources are abundant, cheap, not only realize the synthesis of solid waste
Utilize, can be with environmental protection, saving fibrous raw material, and the product quality of neutral sizing can be substantially improved.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this hair
Bright technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, without
It is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not before creative work is made
The every other embodiment obtained is put, the scope of protection of the invention is belonged to.
Embodiment 1
The calcium silicates of use is extracted from aluminous fly-ash waste residue, and measuring its average grain diameter with laser particle size method is
20um, whiteness 92%ISO, the pH value of 10% suspension is 8.0-9.5.It is 10m in volume3Band stirring rustless steel container in
8.0 tons of clear water is added, 2.0 tons of calcium silicates is slowly added under 800 revs/min of mixing speed, disperses 30min, performance is obtained
Stable calcium silicate filling material suspension, it is standby；
The bleached sulphate for being 35-40 ° of SR with beating degree by the bleached sulphate softwood pulp that beating degree is 50-55 ° of SR
Hardwood pulp presses 30：70 weight than carry out it is with slurry, and sequentially add calcium silicate filling material suspension (over dry consumption be 120kg/ tons
Slurry), AKD sizing agents (consumption 2kg/ ton slurry), cationic starch (8kg/ ton slurries of consumption), PAM (0.5kg/ tons of consumption is starched), be modified
Bentonite (2kg/ tons of slurries of consumption) and appropriate brightening agent are mixed, and are configured to mixed slurry, copy paper of surfing the Net；Pass through double net paper
Machine carries out double dewatering, and l Water Paper page enters shoe press, after preceding drying process, carries out top sizing processing, surface size by
Enzyme converted starch and synthetic styrene-acrylic Cypres composition, solid content 10%, control 25-30kg/ tons of enzyme converted starch spread
Paper, 2-3kg/ tons of paper of synthetic styrene-acrylic Cypres consumption.Drying process after l Water Paper page after top sizing enters, it is rear to dry
Mass dryness fraction enters the progress ornamenting processing of press polish area in 92~94% page after processing, and calendering temperature is controlled in 120 DEG C, calendering pressure
Control is in 90kN/m；After press polish, paper is batched, cut；It can obtain calcium silicates and be filled with neutral sizing, it is detected
Index：Quantification of 70g/m2, opacity >=90%, smoothness >=40s, transversal stretching rate≤2.5%, fracture length roll web indulge
To >=4000m, Surface absorption weight≤30g/m2, moisture 4-6%, ash content 10-12%.
Embodiment 2：
The calcium silicates used measures its average grain diameter with laser particle size method for 30um, whiteness 90%ISO, 10% suspension
PH value is 8.0-9.5.
It is 10m in volume3Band stirring rustless steel container in add 8.0 tons of clear water, in 800 revs/min of mixing speed
Under be slowly added into 2.0 tons of calcium silicates, disperse 30min, obtain the stable calcium silicate filling material suspension of performance, it is standby；
By the bleached sulphate softwood pulp that beating degree is 50-55 ° of SR, beating degree is wealthy for 35-40 ° of SR bleached sulphate
Leaf wood pulp presses 15：85 weight are more with slurry than carrying out, and sequentially add calcium silicate filling material suspension (over dry consumption be 220kg/ ton starch),
AKD sizing agents (2kg/ tons of slurries of consumption), cationic starch (8kg/ tons of slurries of consumption), PAM (0.5kg/ tons of slurries of consumption), bentone
Soil (2kg/ tons of slurries of consumption) and appropriate brightening agent are mixed, and are configured to mixed slurry, online is manufactured paper with pulp；Entered by double net paper machines
Row double dewatering, l Water Paper page is squeezed, after preceding drying process, and progress top sizing processing, surface size is formed sediment by enzymatic conversion
Powder, synthetic styrene-acrylic Cypres composition, solid content 12% control enzyme converted starch spread 25-30kg/ paper, synthetic styrene-acrylic
Cypres consumption 2-3kg/ paper.Drying process after l Water Paper page after top sizing enters, mass dryness fraction exists after rear drying process
92~94% page enters press polish area and carries out ornamenting processing, and calendering temperature control is at 120 DEG C, and calendering pressure is controlled in 90kN/
m；After press polish, paper is batched, cut；It can obtain calcium silicates and be filled with neutral sizing, its Testing index：It is quantification of
90g/m2, opacity >=90%, smoothness >=40s, transversal stretching rate≤2.5%, fracture length roll web longitudinal direction >=4000m,
Surface absorption weight≤30g/m2, moisture is 4-6%, and ash content is 18-20%.
Embodiment 3：
The calcium silicates used measures its average grain diameter with laser particle size method for 40um, whiteness 89%ISO, 10% suspension
PH value is 8.0-9.5.
It is 10m in volume3Band stirring rustless steel container in add 8.0 tons of clear water, in 800 revs/min of mixing speed
Under be slowly added into 2.0 tons of calcium silicates, disperse 30min, obtain the stable calcium silicate filling material suspension of performance, it is standby；
By the bleached sulphate softwood pulp that beating degree is 50-55 ° of SR, 50-60 ° of SR of beating degree Italian APMP slurries,
The bleached sulfate reed pulp that beating degree is 35-40 ° of SR presses 30：35：35 weight are more with slurry than carrying out, and sequentially add calcium silicate filling material
Suspension (consumption 300kg/ tons slurry), AKD sizing agents (2.5kg/ ton slurries of consumption), cationic starch (10kg/ tons of consumption is starched),
PAM (0.6kg/ tons of slurries of consumption), modified alta-mud (3kg/ tons of slurries of consumption), appropriate bright yellow dye are mixed, and are configured to mixing
Slurry, online is manufactured paper with pulp；Double dewatering is carried out by double net paper machines, l Water Paper page enters squeezing, after preceding drying process, carries out top sizing
Processing, surface size is made up of enzyme converted starch, synthetic styrene-acrylic Cypres, solid content 12%, controls enzyme converted starch
Spread 30-40kg/ paper, synthetic styrene-acrylic Cypres consumption 2-3kg/ paper.L Water Paper page after top sizing is done after entering
Dry processing, mass dryness fraction enters the progress ornamenting processing of press polish area in 92~94% page after rear drying process, and calendering temperature control exists
120 DEG C, calendering pressure is controlled in 100kN/m；After press polish, paper is batched, cut；It can obtain the silicic acid of yellow
Calcium is filled with neutral sizing, its Testing index：Quantification of 100g/m2, opacity >=90%, smoothness >=40s, transversal stretching rate
≤ 2.5%, fracture length roll web longitudinal direction >=4000m, Surface absorption weight≤30g/m2, moisture 4-6%, ash content 26-28%.
Comparative example
Manufactured paper with pulp neutral sizing as filler using calcium carbonate, calcium carbonate used measures its average grain using laser particle size method
Footpath is 15um, whiteness 90%ISO, and the pH value of 10% suspension is 8.0-9.5.
By the bleached sulphate softwood pulp that beating degree is 50-55 ° of SR, 50-60 ° of SR of beating degree Italian APMP slurries,
The bleached sulfate reed pulp that beating degree is 35-40 ° of SR presses 30：35：35 weight are more with slurry than carrying out, and sequentially add solid content and be
30% pearl filler (350kg/ tons of slurries of over dry consumption), AKD sizing agents (2.5kg/ tons of slurries of consumption), cationic starch (are used
10kg/ ton slurries of amount), PAM (consumption 0.6kg/ ton starch), modified alta-mud (3kg/ tons of consumption is starched), appropriate bright yellow dye mixed
Close, be configured to mixed slurry, online is manufactured paper with pulp；Double dewatering is carried out by double net paper machines, l Water Paper page enters squeezing, preceding drying process
Afterwards, top sizing processing is carried out, surface size is made up of enzyme converted starch, synthetic styrene-acrylic Cypres, solid content 12%,
Control enzyme converted starch spread 30-40kg/ paper, synthetic styrene-acrylic Cypres consumption 2-3kg/ paper.After top sizing
L Water Paper page enter rear drying process, after rear drying process mass dryness fraction 92~94% page enter press polish area carry out ornamenting processing,
Calendering temperature control is at 120 DEG C, and calendering pressure is controlled in 100kN/m；After press polish, paper is batched, cut；Obtain
The calcium carbonate of yellow is filled with neutral sizing, its Testing index：Quantification of 100g/m2, opacity >=86%, smoothness >=35s,
Transversal stretching rate≤2.5%, fracture length roll web longitudinal direction >=3800m, Surface absorption weight≤30g/m2, moisture 4-6%, ash content
26-28%.
Inventor is contrasted for embodiment 3 and comparative example, and correction data is as shown in table 1.
The embodiment 3 of table 1 and comparative example neutral sizing product contrast table
| Comparative run | Embodiment 3 | Comparative example |
| Opacity | >=90% | >=86% |
| Smoothness | ≥40s | ≥35s |
| Fracture length roll web longitudinal direction | ≥4000m | ≥3800m |
As seen from the results in Table 1：Calcium silicates prepared by the present invention is filled with neutral sizing compared with calcium carbonate is filled with neutral sizing
Compared with calcium silicates, which is filled with neutral sizing, has the number of advantages such as intensity is good, deflection is high, the smooth exquisiteness in surface.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of calcium silicates is filled with the preparation method of neutral sizing, methods described includes：
1) raw material slurry is carried out mixing mashing with calcium silicate filling material and auxiliary material, is configured to mixed slurry；Wherein, the silicic acid
The average grain diameter of calcium is 20~40 μm, whiteness >=85%ISO, and the pH value of 10% suspension is 8.0~9.5；Calcium silicates is relative to exhausted
Do the raw material slurry consumption be：10~30%；
2) by the mixed slurry sequentially pass through wet end dehydration, squeezing, preceding drying, into top sizing treatment process, obtain through
The page crossed after top sizing processing；
3) page after top sizing is handled, order is dried after carrying out, press polish ornamenting process, is obtained calcium silicates and is added
Fill out neutral sizing,
The top sizing processing uses the surface size being made up of starch derivatives and synthetic styrene-acrylic gluing reinforcing agent；Wherein
The surface size each component is relative to over dry page by weight：Starch derivatives 2.0~5.0%；Synthetic styrene-acrylic applying glue increases
Strong agent 0.2~0.3%；
The starch derivatives is oxidized starch or enzyme converted starch, and the solid content of the surface size is 8.0~12.0%；
The press polish ornamenting condition：60~130 °C of temperature, the kN/m of pressure 80~120.
2. calcium silicates according to claim 1 is filled with the preparation method of neutral sizing, it is characterised in that the raw material slurry
Including bleached sulphate softwood pulp and BRATSK, Italy APMP starch and bleached sulfate reed pulp in extremely
A kind of few mixture of fibrous raw material；The weight ratio of the fibrous raw material is as follows：Bleached sulphate softwood pulp：Bleached sulphate
Hardwood pulp：Italian APMP slurries：Bleached sulfate reed pulp is (5~50)：(0~95)：(0~40)：(0~40).
3. calcium silicates according to claim 2 is filled with the preparation method of neutral sizing, it is characterised in that the raw material slurry
In the beating degree of each fibrous raw material be：45~55oSR of bleached sulphate softwood pulp；35~40o of BRATSK
SR；Italian APMP starches 50~60oSR；35~40oSR of bleached sulfate reed pulp.
4. calcium silicates according to claim 1 is filled with the preparation method of neutral sizing, it is characterised in that the auxiliary material includes
It is two or more in sizing agent, cationic starch, retention agent, bentonite and brightening agent.
5. calcium silicates according to claim 4 is filled with the preparation method of neutral sizing, it is characterised in that the control auxiliary material
Consumption relative to raw material slurry described in over dry is：Sizing agent 0.1~0.3%, cationic starch 0.6~1.2%, retention agent 0.05
~0.1%, bentonite 0.2~0.5%, brightening agent 0.2~0.6%.
6. the calcium silicates according to claim 4 or 5 is filled with the preparation method of neutral sizing, it is characterised in that the applying glue
Agent is selected from alkyl ketene dimer and/or alkenyl succinic anhydride.
7. the calcium silicates according to claim 4 or 5 is filled with the preparation method of neutral sizing, it is characterised in that the retention
Agent is PAMC and/or PAMA.
8. a kind of calcium silicates prepared according to any one of claim 1-7 methods described is filled with neutral sizing.
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| CN105586802B (en) * | 2016-02-19 | 2017-06-20 | 岳阳林纸股份有限公司 | A kind of manufacture method of the rich body paper of product |
| CN105603803A (en) * | 2016-02-23 | 2016-05-25 | 岳阳林纸股份有限公司 | Method for making paper special for E-commerce |
| CN107354802A (en) * | 2016-05-09 | 2017-11-17 | 镇江大东纸业有限公司 | The production method of leather neutral sizing |
| CN110656539B (en) * | 2018-06-29 | 2021-12-10 | 玖龙纸业（东莞）有限公司 | Glasin base paper, and production method and production system thereof |
| CN111021126B (en) * | 2019-12-27 | 2022-06-07 | 民丰特种纸股份有限公司 | Low-quantitative release base paper and preparation method thereof |
| CN111890451B (en) * | 2020-07-23 | 2022-02-22 | 华邦古楼新材料有限公司 | Thermal transfer paper processing technology and slitting device |
| CN114481701B (en) * | 2022-01-25 | 2022-11-11 | 肇庆三乐集成房屋制造有限公司 | Fireproof calcium silicate board surface sticker and preparation method and application thereof |
| CN114855495A (en) * | 2022-06-06 | 2022-08-05 | 岳阳林纸股份有限公司 | Double-sided release base paper and preparation method thereof |
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| US6379501B1 (en) * | 1999-12-14 | 2002-04-30 | Hercules Incorporated | Cellulose products and processes for preparing the same |
| CN101638861B (en) * | 2009-08-16 | 2012-07-18 | 岳阳林纸股份有限公司 | Manufacturing method of industrial film coated base paper |
| CN102493284A (en) * | 2011-11-29 | 2012-06-13 | 岳阳林纸股份有限公司 | Method for producing glassine paper |
| CN102899960B (en) * | 2012-11-06 | 2015-09-16 | 大唐国际发电股份有限公司 | A kind of synthetic calcium silicate adds the surface treatment method filling out offset printing paper |
| CN102912669A (en) * | 2012-11-06 | 2013-02-06 | 大唐国际发电股份有限公司 | Light offset paper filled with synthetic calcium silicate and manufacturing method thereof |
| CN103422397B (en) * | 2013-06-13 | 2015-11-25 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Height adds filler millboard and pulping method thereof |
| CN103526630B (en) * | 2013-11-05 | 2015-11-25 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Pulping method of high surface strength offset printing paper and products thereof |
| CN104120621A (en) * | 2014-06-30 | 2014-10-29 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Application of calcium silicate as retention aiding intensifier in papermaking |
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