CN109680536A - A kind of production method of light weight papers - Google Patents
A kind of production method of light weight papers Download PDFInfo
- Publication number
- CN109680536A CN109680536A CN201910163343.2A CN201910163343A CN109680536A CN 109680536 A CN109680536 A CN 109680536A CN 201910163343 A CN201910163343 A CN 201910163343A CN 109680536 A CN109680536 A CN 109680536A
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- China
- Prior art keywords
- paper
- pulp
- tons
- wood pulp
- light weight
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Classifications
-
- 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
- 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
- D21H11/10—Mixtures of chemical and mechanical 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
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention discloses a kind of production methods of light weight papers, including wood pulp proportion and its mixing step, it is matched using needle BCMTP chemi-mechanical pulp and needle bleached wood pulp, is then beaten, select neutral sizing agent, cationic starch, the polyacrylamide of cationic, talcum powder.Then papermaking process is carried out.Using import softwood pulp, leaf wood bleached sulphate chemical pulp is beaten respectively, with slurry and addition various additives, it is sent into approach system, is further dehydrated through wet end drainage and formation, then into press section, pass through preceding drying, half dry finish, drying section is dry after top sizing, cold baking processing, one group of soft calendaring ornamenting such as batches at the techniques.It first is that reaching high bulk, and will not influence the flatness and tensile strength of paper, adapt to high speed printing；Two are free from fluorescent whitening agent, and compared to common art paper, offset paper is played, the color of light paper is darker, close with wood pulp primary colors.Reading for a long time not will cause visual fatigue.
Description
Technical field
The present invention relates to pulp technology for making paper, the opacity and the higher lightweight of bulk of specifically a kind of paper
The production method of paper.
Background technique
Low weight printing paper is that western countries developed fast one paper kind in recent years, typically contains 70% or more machinery wood
Slurry and 30% bleach chemical pulp below.It is papery bulky, well-pressed, there is good absorbency and opacity, in terms of intensity
The print request of high speed rotary press can be met again, whiteness is generally not more than 80%, as one kind of book and periodical printing paper, quilt
It is largely used to books, periodical, student textbook, advertising etc..Due to the slurrying material of mechanical pulp is few, chemicals consumption less and
Sewage is easy to handle, paper tone is soft etc., is referred to as environment protecting paper.
The bulk and opacity of low weight printing paper are high, and absorbency is good, and color is soft, can protect eyesight, quantitative light section
The about energy, while the natural characteristic for having paper rich are able to satisfy high speed rotary press in typographic requirement, so gently
Matter printing paper becomes China and develops fast one paper kind.
China had obtained certain development, especially in terms of producing offset printing paper with high yield pulp1 mechanical pulp in recent years
The production of light weight papers has certain scale and level.National news publish general administration, and oneself formally sent the documents on December 31st, 2003,
Agree to that students in middle and primary schools' textbook is printed using light weight papers, some publicity pictures album and popular book are also largely printed using light weight papers.But
Product quality is irregular, and overall quality is not high, and it is coarse, fineless and smooth to be mainly manifested in paper, and smoothness is low and two sides is poor big, ash
Divide not high, assortment list first-class.With the enhancing of people's environmental consciousness and the raising of educational level, visual environment-friendly and euphorosia
Concept will be received by more and more people.It is well known that the printing paper in China is mostly white, some paper whiteness are even connect
Nearly 100%.It is extremely disadvantageous to human visual using the paper of high whiteness for medical angle and optical principle.It is more and more
Research data show, be the main cause for causing adolescent myopia in black and white.Low weight printing paper is main with high yield pulp1 mechanical pulp
Raw material, appearance are in colour prime white or light beige, and strongest vision can be caused with least light wave and is only second to the bright of white light
Degree, is reduced to visual fatigue minimum.
Due to using reducing rules more when producing low weight printing paper, anionic trash is more in paper machine system, when the amount of being filled with
When larger, the retention of filler and fiber fines is lower, and white water consistency is high, and first-pass retention is low.
Currently, main technical problems to be solved, first is that reach high bulk, and will not influence the flatness of paper with
Tensile strength adapts to high speed printing；Two are free from fluorescent whitening agent, are in off-white color or light cream-coloured, phase because particular dye is added
Compared with common art paper, offset paper, the color of light paper is darker, close with wood pulp primary colors.Simple and unsophisticated, the natural sense to people's one kind
Feel, long-time reading not will cause visual fatigue with the books and periodicals that light paper prints.
Summary of the invention
The present invention is exactly to provide a kind of production method of light weight papers to solve deficiencies of the prior art.Make
With import softwood pulp, leaf wood bleached sulphate chemical pulp is beaten respectively, and with slurry and addition various additives are sent into stream
System is sent, is further dehydrated through wet end drainage and formation, then into press section, by preceding drying, half dry finish is dry after top sizing
Portion is dry, cold baking processing, one group of soft calendaring ornamenting, the techniques such as batches.Light weight papers production uses double base Retention Aid System, i.e., in pressure
The cationic starch of high substituted degree is added before sieve, the cationic polyacrylamide of addition high molecular weight after pressurized screen, and talcum
Powder is added in the pipeline after desander.
The technical scheme adopted by the invention to solve the technical problem is that:
A kind of production method of light weight papers, including wood pulp proportion and its mixing step, the characteristics of according to low weight printing paper, are answered
It selects based on high yield pulp1 chemi-mechanical pulp, is equipped with partial bleaching chemical wood pulp.Using the purpose of chemi-mechanical pulp, mainly increase
Add the opacity and bulk of paper, the purpose of adapted chemical bleaching slurry is the mechanical strength for increasing page.
BCTMP is the most important chemi-mechanical pulp of present paper industry.It is to be carried out giving processing to wood chip with chemicals,
By paper pulp made of defibrination, bleaching, slurry yield doubles in 8 5-90% than bleached wood pulp.With bleached wood pulp
It compares, has investment and production at low cost, yield is high, bulk is good, opacity and stiffness are high, and can reduce the pollution to environment
The advantages that.
For the mechanical strength for guaranteeing light weight papers, adapted partial bleaching chemical wood pulp is needed.Determine appropriate raw material proportioning are as follows:
Needle BCMTP chemi-mechanical pulp: needle bleached wood pulp=65-75:35-25；The characteristics of according to low weight printing paper, Ying Xuanyong
Based on high yield pulp1 chemi-mechanical pulp, it is equipped with the raw material mix of part needle bleached wood pulp.It is main using the purpose of reducing rules
If increasing the opacity and bulk of paper.The purpose of adapted needle bleached wood pulp is that the machinery of increase page is strong
Degree improves manufacturing paper with pulp property of paper machine and print runnability.
Using mixing defibrination, beating consistency 4.0-4.3%, beating degree controls 38-40 ° of SR, weight in wet base 3.5-4.0g.
The feature that its light scattering coefficient is high, bulk is good can have not only been given full play in this way, but also can avoid because BCTMP fiber is thick
Firmly, it influences to have an adverse effect between fiber in conjunction with and to paper strength.When actual production, in the commodity for selecting suitable freedom
BCTMP simultaneously, should be before use, sufficiently impregnate, and is further reduced fibre bundle through low dense fiberizer fine grinding, reinforces screening,
Guarantee that paper is smooth, clean, the fibre bundle of no protrusion.Using half free, half viscous shape mashing mode, appropriateness is obtained in fiber and is cut
While disconnected, so that fiber is obtained the wire-dividing broom purification of abundant swollen and few fibers, make page in terms of intensity, evenness, obtain
Guarantee.
According to the property and mode of printing of light weight papers, neutral sizing assigns the loosing character and surface exquisiteness of page, more accords with
The characteristic requirements of low weight printing paper are closed, in addition, Neutral Sizing is increasingly mature, matched polynary Microparticle Retention System increases
The combination of fiber, is improved paper strength and surface strength, the raising of fiber fines and filler retention makes paper table
Face is more fine and smooth, and smoothness improves, neutral sizing agent (using AKD) 12-16kg/ tons of paper of dosage.
To eliminate anionic trash in paper pulp, cationic starch 10-12kg/ tons of paper is added, but needing before use first will be positive
Ionic starch boiled at 93-95 DEG C it is fully dispersed uniformly, controlled concentration is in 10.5-11.5%；And poly- the third of cationic
0.2-0.25kg/ tons of paper of acrylamide.
For improve sheet smoothness and and slurry drainability, add a certain amount of talcum powder, dosage 80-110kg/
Ton paper.The selection of low weight printing paper filler is also critically important.The purpose the being filled with usually opacity of raising paper and paper is thin
Greasy degree can also reduce fibrous raw material dosage, save production cost, but additional amount is appropriate.Packing variety will be according to fiber original
Expect that structure is selected.Although neutral sizing mostly uses calcium carbonate to make filler, according to the raw material mix of light weight papers, Ying Xuanding talcum powder
For filler.Talcum powder can produce close, careful page surface, be used in combination with BCTMP, can play the effect to bring out the best in each other
Fruit, although and light calcium loosing character is good, be used cooperatively with BCTMP, page mechanical strength and paper exquisiteness degree are not so good as talcum powder,
Coarse whiting retention is low, and the abrasion of paper machine are big.
Papermaking process: network speed 200m/min, coiling speed 220m/min, head box lip aperture 8-12mm, suction press
Line pressure 60-65kN/m, positive pressure line pressure 80-88kN/m；
Top sizing selects oxidized starch, 40-55kg/ tons of paper of dosage+4-5kg/ tons of styrene acrylic sizing agent paper, oxidized starch
In 10-12%, resin added reaches 3-5g/m2 for upper machine concentration control.
The cationic starch need first to boil cationic starch at 93-95 DEG C before use it is fully dispersed uniformly,
Controlled concentration is in 10.5%-11.5%
The beneficial effects of the present invention are:
1, based on high yield pulp1 chemi-mechanical pulp, it is equipped with partial bleaching chemical wood pulp.It is main using the purpose of chemi-mechanical pulp
If increasing the opacity and bulk of paper, the purpose of adapted chemical bleaching slurry is the mechanical strength for increasing page.With drift
White chemical wood pulp is compared, and chemi-mechanical pulp has investment and production at low cost, and yield is high, bulk is good, opacity and stiffness are high,
And the advantages that pollution to environment can be reduced.The purpose of adapted needle bleached wood pulp is the mechanical strength for increasing page, changes
Kind manufacturing paper with pulp property of paper machine and print runnability.
2, according to the property of light weight papers and mode of printing, neutral sizing assigns the loosing character and surface exquisiteness of page, more
Meet the characteristic requirements of low weight printing paper, in addition, Neutral Sizing is increasingly mature, matched polynary Microparticle Retention System increases
The combination for having added fiber is improved paper strength and surface strength, and the raising of fiber fines and filler retention makes paper
Surface is more fine and smooth, and smoothness improves.
3, the selection of low weight printing paper filler is also critically important.The purpose being filled with is usually to improve the opacity and paper of paper
Face exquisiteness degree can also reduce fibrous raw material dosage, save production cost, but additional amount is appropriate.Packing variety will be according to fibre
It is selected to tie up raw material mix.Although neutral sizing mostly uses calcium carbonate to make filler, according to the raw material mix of light weight papers, cunning should be selected
Mountain flour is filler.Talcum powder can produce close, careful page surface, be used in combination with BCTMP, can play and bring out the best in each other
Effect, although and light calcium loosing character is good, be used cooperatively with BCTMP, page mechanical strength and paper exquisiteness degree are not as good as sliding
Mountain flour, coarse whiting retention is low, and the abrasion of paper machine are big.
4, the beating degree and weight in wet base that the present invention uses can both give full play to the feature that its light scattering coefficient is high, bulk is good,
It can avoid influencing to have an adverse effect between fiber in conjunction with and to paper strength because BCTMP fiber is thick and stiff again.When actual production,
Select the commodity BCTMP of suitable freedom simultaneously, it should be before use, sufficiently impregnate, and come through low dense fiberizer fine grinding further
It reduces fibre bundle, reinforce screening, guarantee that paper is smooth, clean, the fibre bundle of no protrusion.Using half free, half viscous shape mashing
Mode makes fiber obtain the wire-dividing broom purification of abundant swollen and few fibers, page is made to exist while fiber obtains appropriate cut off
In terms of intensity, evenness, it is guaranteed.
Specific embodiment
In order to clearly illustrate the technical characterstic of this programme, the present invention is explained in detail below by specific embodiment
It states.
We use three kinds of different papermaking variables, produced, then detect moisture, tensile strength, wet tensile (strength),
The physical indexs such as ash content, resistance to broken, Cobb value.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (2)
1. a kind of production method of light weight papers, including wood pulp proportion and its mixing step, characterized in that
(1) slurry weight percentage: needle BCMTP chemi-mechanical pulp: needle bleached wood pulp=65-75:35-25；
(2) defibrination is mixed, beating consistency controls 38-40 ° of SR, weight in wet base 3.5-4.0g in 4.0-4.3%, beating degree；
(3) auxiliary material is selected: sizing agent selects neutral sizing agent, 12-16kg/ tons of paper of dosage；10-12kg/ tons of paper of cationic starch；
0.2-0.25kg/ tons of paper of polyacrylamide of cationic；80-110kg/ tons of paper of talcum powder；
(4) papermaking process: network speed 200m/min, coiling speed 220m/min, head box lip aperture 8-12mm, suction press line
Pressure 60-65kN/m, positive pressure line pressure 80-88kN/m；
(5) top sizing selects oxidized starch, 40-55kg/ tons of paper of dosage+4-5kg/ tons of styrene acrylic sizing agent paper, oxidized starch
In 10-12%, resin added reaches 3-5g/m for upper machine concentration control2。
2. a kind of production method of light weight papers according to claim 1, characterized in that the cationic starch is using
Before first cationic starch need to be boiled at 93-95 DEG C it is fully dispersed uniformly, controlled concentration is in 10.5%-11.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910163343.2A CN109680536A (en) | 2019-03-05 | 2019-03-05 | A kind of production method of light weight papers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910163343.2A CN109680536A (en) | 2019-03-05 | 2019-03-05 | A kind of production method of light weight papers |
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| CN201910163343.2A Pending CN109680536A (en) | 2019-03-05 | 2019-03-05 | A kind of production method of light weight papers |
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Cited By (3)
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| CN111648163A (en) * | 2020-05-12 | 2020-09-11 | 仙鹤股份有限公司 | Preparation method of high-tightness process packaging base paper |
| CN112553941A (en) * | 2020-11-09 | 2021-03-26 | 山东华泰纸业股份有限公司 | Production process of ink jet printing paper |
| CN114808534A (en) * | 2022-01-21 | 2022-07-29 | 金东纸业（江苏）股份有限公司 | Pure paper and preparation method thereof |
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| CN112553941A (en) * | 2020-11-09 | 2021-03-26 | 山东华泰纸业股份有限公司 | Production process of ink jet printing paper |
| CN114808534A (en) * | 2022-01-21 | 2022-07-29 | 金东纸业（江苏）股份有限公司 | Pure paper and preparation method thereof |
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