CN102926267B - Archival paper and manufacturing method thereof - Google Patents
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Abstract
The invention discloses archival paper which is formed by manufacturing paper with pulp, squeezing, drying, calendaring and finishing mixed pulp and auxiliary materials through a paper machine. The mixed pulp is composed of 85% to 95% of alkaline bleached bask fiber, 4% to 10% of cotton pulp fiber and 1% to 5% of aramid fiber by weight percent. The auxiliary materials are composed of 15% to 25% of stuffing, 0.2% to 0.5% of sizing agents, 0.02% to 0.1 % of brightening agents and 0.02% to 0.04% of retention agents by weight percent relative to the absolutely dry mixed pulp. Alkali treatment is further carried out on general goods bleached bask, a little of aramid fiber and cotton pulp are matched, and archival paper are manufactured on neutrality condition. Bleached bask is treated by alkali, washed, separated and treated by acid to reduce non fiber matter and fiber amorphous area content and improve fiber alpha cellulose content and fiber crystalline. Compound aramid fiber is used for manufacturing the archival paper which is good in thermal resistance, radiation resistance and durability.
Description
Technical field
The present invention relates to a kind of archival paper, specifically, relate to a kind of archival paper and manufacture method thereof, belong to archival paper manufacturing technology field.
Background technology
Archives, document and some historical valuable materials are a country and national politics, economy and cultural record, be the foundation stone that human history civilization is passed on and carries forward, its integrality of preserving, permanent relationship are to whole national politics, economy and cultural development.But there are a lot of archives and books and reference materials to become gradually can not use because of the aging of paper used at present, bring great loss to the development of society and cultural continuity.
According to statistics, from 1850 to 1950 during publish most of books be difficult to be saved in the next century.Research according to William Bo Lao library shows, the books published between 1900 to nineteen thirty-seven, the life-span of 97% only has 50 years, and in the books published between 1900 to 1969, minimum intensity lower limit (folding strength less than 3 times) has been arrived in the paper strength self-destruction of existing 69%.According to 1981 estimate, Library of Congress have 1/3 that is 600,000,000 books be in shredded paper state.It is reported, in the archives that Shaanxi Prov. Archives of China preserves, with the material of newsprint in printing in 1981, turned to be yellow and become fragile; In printing in 1934, sallow, and one touches namely broken, and material print the forties with typographic printing paper is also sallow and one tactile namely broken, and is printed on the typographic printing paper archives before the twenties, then self-destruction is already pitchy fragment.
In addition, the archives of current China and document paper using exist acid strong, folding strength and tearability poor, the problems such as rough surface.Some important archival papers all will from external import, and the price of archival paper often common paper 3-5 doubly, so consume a large amount of foreign exchange.People in the industry has carried out a large amount of Research experiments for this reason, and as development neutral and alkali archival paper, waterproof archival paper etc., but, research is only improve from paper technology, as adopted neutral sizing, or carries out suitable WATER REPELLENT TREATMENT etc.; Adopt cotton pulp papermaking process can effectively overcome above shortcoming, improve archives, the durability of Literature publication thing paper using and durability to a certain extent, but cotton yarn papermaking process cost compare is high, causes the significantly increase of paper manufacturing cost.
The traditional paper making technique of China is general all based on acid copy paper, wet end of machine adopts alumina-rosin sizing agent system, the alumina added not only can make paper embrittlement, intensity reduce, also can cause TDS(total dissolved solidss thing content in water) and COD(chemical oxygen consumption (COC)) index is too high, cause equipment to degenerate and serious environmental pollution, also shorten the period of storage of paper simultaneously.
Find after deliberation, paper aging main relevant with the papermaking process, raw material composition etc. of paper.As kind and the character of Papermaking fibers, the content of the structure of fiber itself and chemical composition, particularly chemical cellulose and cellulosic degree of crystallinity and the degree of polymerization; Interfibrous bonding state; Sizing material in paper, coating, acid and metallic compound etc. factors all can directly affects the life-span of paper.Bleaching agent residue and organic acid in paper pulp, the Cypres of paper and coating, sour gas in air, and the contact of paper and human body skin, capital makes the acidity of paper increase and accelerated ageing, particularly in acid paper-making process, adopt during rosin applying glue and usually use alum, because alum meets water, hydrolysis occurs and causes producing free acid in paper, paper fiber becomes stiff under acid effect, cause the oxo bridge hydrolytic cleavage between cellulose macromolecule elementary cell, quinones chromophoric group reduces, and makes paper from yellowing embrittlement, loses character of use gradually.Metal ion is on the impact of archives paper aging: the water used in paper making process, machinery, cooking liquor, filler are executed agent etc. and left the metal ions such as iron, copper, manganese, titanium, zinc, calcium, magnesium to paper; To submit a written statement to a higher authority at archives paper the writing write, print, drop on the dust on archives, dirt, be used for binding the metal object of archives and depositing the metal tank bracket of archives, also paper all can be made to produce with metal surface directly contact, pH value of paper changes thus adds the fragility of paper, shortens use and the shelf life of paper.
A large amount of market surveys and the result researched and analysed show, carry out suitably process and can improve chemical cellulose content and degree of crystallinity, can make into paper and have high temperature resistant, the feature that can preserve for a long time common needle fiber.
Aramid fiber full name is " PPTA ", be a kind of novel high-tech synthetic fiber, there is superhigh intensity, high-modulus and high temperature resistant, acid-fast alkali-proof, the premium properties such as lightweight, its intensity be the 5-6 of steel wire doubly, modulus is 2-3 times of steel wire or glass fibre, toughness is 2 times of steel wire, and weight is only about 1/5 of steel wire, at the temperature of 560 degree, do not decompose, do not melt, it has good insulating properties and ageing resistace, has very long life cycle.The discovery of aramid fiber, is considered to material circle very important historical progress.Aramid fiber has excellent intensity index and antioxygenic property, can significantly improve the high temperature resistant of archival paper and long-term preservability.
Summary of the invention
The technical problem to be solved in the present invention is for above deficiency, a kind of archival paper is provided, overcome that the prior art Archives paper using resting period is short, production cost is high and the defect of poor durability, archives paper using of the present invention, physical strength is good, high temperature resistant, anti-oxidant, not embrittlement, YI yellow index is low and the resting period is permanent.
Another object of the present invention is to provide a kind of manufacture method of archival paper, and adopt the method Product archives paper, production cost is low, and archival paper durability is high.
For solving above technical problem, the technical solution used in the present invention is: a kind of archival paper shapingly to be manufactured paper with pulp through paper machine by mixed slurry and auxiliary material, squeeze, dry and press polish ornamenting forms;
Described mixed slurry consisting of by mass percentage: alkaline bleached softwood pulp fibres 85-95%, cotton pulp fiber 4-10% and aramid fiber 1-5%;
Described auxiliary material consists of relative to the mass percent of over dry mixed slurry: filler 15-25%, sizing agent 0.2-0.5%, brightening agent 0.03-0.1% and retention agent 0.02-0.04%.
A kind of prioritization scheme, described alkaline bleached softwood pulp fibres is the softwood pulp fiber after basic treatment.
Another kind of prioritization scheme, described filler is calcium carbonate; Sizing agent is AKD; Brightening agent is stilbene biphenyl sodium disulfonate; Retention agent is polyacrylamide.
Another prioritization scheme, described alkaline bleached softwood pulp fibres beating degree 20oSR-40oSR, cotton pulp fiber beating degree 40oSR-50oSR.
Based on above archival paper, the preparation method of described archival paper comprises the following steps:
Prepare alkaline bleached softwood pulp fibres;
Each raw material is weighed according to described ratio;
Respectively alkaline bleaching needle-point leaf pulp fiber and cotton pulp fiber are carried out making beating process, obtain alkaline bleached softwood slurry slurry, cotton pulp slurry.Described alkaline bleached softwood slurry slurry, cotton pulp slurry and the aramid fiber without making beating are made into mixed slurry; With deflaker, described mixed slurry is discongested;
Add filler, sizing agent, brightening agent and retention agent in mixed slurry after discongesting successively and be made into paper stock;
Described paper stock stream is delivered to head box, then controls online paper stock concentration 0.5-0.6%, online paper stock pH7.5-8.0; Slurry network speed compares 0.97-1.00; Paper stock through fourdrinier wire dehydration, squeezing, drying, press polish ornamenting, batch, rewinding obtains archival paper.
Further optimization, described preparation alkalescence bleached softwood pulp fibres step comprises:
Needle slurry is added and water is made into the suspension of mass concentration 2.0-2.5% in stainless steel tank body, add the NaOH solution 30-35L that concentration is 200g/L, under 30 ± 2 DEG C of conditions, reaction treatment 450-460min, centrifugation 20-30min under 2500rpm, obtains needle pulp fibres; Add water in needle pulp fibres and be made into the needle pulp fibres suspension of mass concentration 2.0-2.2%, add sulfuric acid and regulate pH=3-4 under 35 ± 2 DEG C of conditions, process 30-35min, centrifuge washing is separated and obtains alkaline bleached softwood pulp fibres.
The present invention compared with prior art, has the following advantages: gained archival paper bulk is good, opacity is high, surface smoothing exquisiteness, the soft conjunction of color, simple nature, and printing effect is excellent, be convenient to write.By carrying out alkali treatment further to general goods bleached softwood slurry, coordinate a small amount of aramid fiber and cotton pulp, neutrallty condition is manufactured paper with pulp archival paper.Bleached softwood slurry, by basic treatment, washing, is separated and is separated with acid treatment, washing, reduces bleached softwood and starches non-fibrous and fiber noncrystalline domain content, improve fiber chemical cellulose content and fibre crystallinity; Composite aramid fiber is manufactured paper with pulp and is had the archival paper of good heat-resisting, radiation hardness and durability.The archival paper weight per unit length 70g/m of preparation
2above, paper physical index: the thickness of page is greater than 0.07mm; Tearability is greater than 350mN; Folding strength is greater than 150 times; And the Kappa number that the method specified according to ISO302 measures is less than 5.0; Indices after (24 days) xeothermic accelerated ageing in 100 ± 5 DEG C, 580 hours exceedes the requirement of general long life paper, be calculated to through theory and can preserve 300 years less, reach the requirement of country's " information and bibliographic file paper durability and durability requirements GB/T24422-2009 ".
Below in conjunction with embodiment, the present invention is described in detail.
Detailed description of the invention
Be described the preferred embodiments of the present invention below, preferred embodiment described herein, only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1, a kind of archival paper, shapingly to be manufactured paper with pulp through paper machine by mixed slurry and auxiliary material, squeezes, dry and press polish ornamenting forms.
Mixed slurry consisting of by mass percentage: alkaline bleached softwood pulp fibres 85%, cotton pulp fiber 10% and aramid fiber 5%; Alkalescence bleached softwood pulp fibres is the softwood pulp fiber after basic treatment.
Consisting of (with each auxiliary material component to the mass percent of over dry mixed slurry) of described auxiliary material:
Filler 15% is calcium carbonate; Sizing agent 0.2% is AKD; Brightening agent 0.03% is stilbene biphenyl sodium disulfonate; The consumption 0.02% of retention agent is polyacrylamide.
Above archival paper is prepared in accordance with the following steps:
1) alkaline bleached softwood pulp fibres process: at 5m
32000kg needle slurry is added and water is made into the suspension of mass concentration 2.0% in stainless steel tank body, add the NaOH solution 30L that concentration is 200g/L, under 30 ± 2 DEG C of conditions, reaction treatment 450min, centrifugation 20min under 2500rpm, obtains needle pulp fibres, thin up is made into the needle pulp fibres suspension of mass concentration 2.0% again, add sulfuric acid under 35 ± 2 DEG C of conditions and regulate pH=3, process 30min, centrifuge washing is separated and obtains alkaline bleached softwood pulp fibres;
Through above process, reduce bleached softwood slurry lignin, fat and pectin class non-fiber impurity and fiber noncrystalline domain content, improve chemical cellulose content in slurry and reach more than 80%, keep fibrous polymer degree, improve degree of crystallinity, obtain the needle pulp fibres that physical strength is good, high temperature resistant, anti-oxidant, YI yellow index is low.
2) raw materials weighing: weigh each raw material according to described ratio;
3) respectively alkaline bleaching needle-point leaf pulp fiber and cotton pulp fiber are carried out making beating process, obtain alkaline bleached softwood slurry slurry, cotton pulp slurry, alkaline bleached softwood slurry slurry, cotton pulp slurry and the aramid fiber without making beating are made into mixed slurry 9000kg; The beating degree 38.5oSR of alkalescence bleaching needle-point leaf pulp slurry; The beating degree 40.5oSR of cotton pulp slurry; With deflaker, mixed slurry is discongested;
4) paper stock preparation: add 1350kg pearl filler in the mixed slurry after discongesting, then add successively
Enter AKD sizing agent 18kg, brightening agent stilbene biphenyl sodium disulfonate 2.7kg, retention agent polyacrylamide 1.8kg, is made into paper stock;
5) shapingly to manufacture paper with pulp: paper stock stream delivers to head box, then control online paper stock concentration 0.5%, online paper stock pH7.5; Slurry network speed is than 0.97; Paper stock through fourdrinier wire dehydration, squeezing, drying, press polish ornamenting, batch, rewinding obtains archival paper.
Obtained quantitative 100 g/m of archival paper
2; Moisture is 5.2%; Whiteness (ISO) 95%; Tearability 1650mN; Folding strength 672 times; Become the Kappa number 1.35 of paper.Indices after (24 days) xeothermic accelerated ageing in 100 ± 5 DEG C, 580 hours exceedes the requirement of general long life paper, is calculated to can preserves 300 years less through theory.
Embodiment 2, a kind of archival paper, shapingly to be manufactured paper with pulp through paper machine by mixed slurry and auxiliary material, squeezes, dry and press polish ornamenting forms.
Mixed slurry consisting of by mass percentage: alkaline bleached softwood pulp fibres 95%, cotton pulp fiber 4% and aramid fiber 1%; Alkalescence bleached softwood pulp fibres is the softwood pulp fiber after basic treatment.
Consisting of (with each auxiliary material component to the mass percent of over dry mixed slurry) of described auxiliary material:
Filler 25% is calcium carbonate; Sizing agent 0.5% is AKD; Brightening agent 0.1% is stilbene biphenyl sodium disulfonate; Retention agent 0.04% is polyacrylamide.
Above archival paper is prepared in accordance with the following steps:
1) in stainless steel tank body, add needle slurry and water is made into the suspension of mass concentration 2.5%, add the NaOH solution 35L that concentration is 200g/L, under 30 ± 2 DEG C of conditions, reaction treatment 460min, centrifugation 30min under 2500rpm, obtains needle pulp fibres; Thin up is made into the needle pulp fibres suspension of mass concentration 2.2% again, adds sulfuric acid and regulate pH=4 under 35 ± 2 DEG C of conditions, process 30min, and centrifuge washing is separated the alkaline bleached softwood pulp fibres obtaining needing;
2) raw materials weighing: alkaline bleached softwood pulp fibres, cotton pulp fiber and aramid fiber weigh each raw material components according to quality proportioning 95:4:1.
Respectively alkaline bleaching needle-point leaf pulp fiber and cotton pulp fiber are carried out making beating process, alkaline bleached softwood slurry slurry, cotton pulp slurry and the aramid fiber without making beating are made into mixed slurry 9000kg; The beating degree 39.5oSR of alkalescence bleaching needle-point leaf pulp slurry; The beating degree 41.5oSR of cotton pulp slurry; With deflaker, mixed slurry is discongested;
3) paper stock preparation: add 2250kg pearl filler in the mixed slurry after discongesting, add sizing agent 45kg successively, brightening agent stilbene biphenyl sodium disulfonate 9kg, retention agent polyacrylamide 3.6kg, is made into paper stock;
4) online paper stock concentration 0.5% is controlled, online paper stock pH:7.5; Slurry network speed is than 0.97; Paper stock through fourdrinier wire dehydration, squeezing, dry, press polish ornamenting (contact pressurization), batch, rewinding obtains archival paper.
5) obtained quantitative 80 g/m of archival paper
2; Moisture is 4.8%; Whiteness (ISO) 105%; Tearability 1012mN; Folding strength 550 times; Become the Kappa number 1.14 of paper.Indices after (24 days) xeothermic accelerated ageing in 100 ± 5 DEG C, 580 hours exceedes the requirement of general long life paper, is calculated to can preserves 300 years less through theory.
Embodiment 3, a kind of archival paper, shapingly to be manufactured paper with pulp through paper machine by mixed slurry and auxiliary material, squeezes, dry and press polish ornamenting forms.
Mixed slurry consisting of by mass percentage: alkaline bleached softwood pulp fibres 90%, cotton pulp fiber 7% and aramid fiber 3%; Alkalescence bleached softwood pulp fibres is the softwood pulp fiber after basic treatment.
Consisting of (with each auxiliary material component to the mass percent of over dry mixed slurry) of described auxiliary material:
Filler 20% is calcium carbonate; Sizing agent 0.3% is AKD; Brightening agent 0.07% is stilbene biphenyl sodium disulfonate; Retention agent 0.03% is polyacrylamide.
Above archival paper is prepared in accordance with the following steps:
1) in stainless steel tank body, add needle slurry and water is made into the suspension of mass concentration 2.5%, add the NaOH solution 35L that concentration is 200g/L, under 30 ± 2 DEG C of conditions, reaction treatment 460min, centrifugation 30min under 2500rpm, obtains needle pulp fibres; Thin up is made into the needle pulp fibres suspension of mass concentration 2.2% again, adds sulfuric acid and regulate pH=4 under 35 ± 2 DEG C of conditions, process 30min, and centrifuge washing is separated the alkaline bleached softwood pulp fibres obtaining needing;
2) raw materials weighing: alkaline bleached softwood pulp fibres, cotton pulp fiber and aramid fiber weigh each raw material components according to quality proportioning 95:4:1.
Respectively alkaline bleaching needle-point leaf pulp fiber and cotton pulp fiber are carried out making beating process, alkaline bleached softwood slurry slurry, cotton pulp slurry and the aramid fiber without making beating are made into mixed slurry 9000kg; The beating degree 39.5oSR of alkalescence bleaching needle-point leaf pulp slurry; The beating degree 41.5oSR of cotton pulp slurry; With deflaker, mixed slurry is discongested;
3) paper stock preparation: add 1800kg pearl filler in the mixed slurry after discongesting, add sizing agent 27kg successively, brightening agent stilbene biphenyl sodium disulfonate 6.3kg, retention agent polyacrylamide 2.7kg, is made into paper stock;
4) online paper stock concentration 0.6% is controlled, online paper stock pH:8.0; Slurry network speed is than 1.00; Paper stock through fourdrinier wire dehydration, squeezing, dry, press polish ornamenting (contact pressurization), batch, rewinding obtains archival paper.
5) obtained quantitative 80 g/m of archival paper
2; Moisture is 4.5%; Whiteness (ISO) 107%; Tearability 1212mN; Folding strength 750 times; Become the Kappa number 1.27 of paper.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. an archival paper, is characterized in that: described archival paper shapingly to be manufactured paper with pulp through paper machine by mixed slurry and auxiliary material, squeeze, dry and press polish ornamenting forms;
Mixed slurry consisting of by mass percentage: alkaline bleached softwood pulp fibres 90%, cotton pulp fiber 7% and aramid fiber 3%; Alkalescence bleached softwood pulp fibres is the softwood pulp fiber after basic treatment;
Described auxiliary material is with each auxiliary material component consisting of the mass percent of over dry mixed slurry:
Filler 20% is calcium carbonate; Sizing agent 0.3% is AKD; Brightening agent 0.07% is stilbene biphenyl sodium disulfonate; Retention agent 0.03% is polyacrylamide;
Above archival paper is prepared in accordance with the following steps:
1) in stainless steel tank body, add needle slurry and water is made into the suspension of mass concentration 2.5%, add the NaOH solution 35L that concentration is 200g/L, under 30 ± 2 DEG C of conditions, reaction treatment 460min, centrifugation 30min under 2500rpm, obtains needle pulp fibres; Thin up is made into the needle pulp fibres suspension of mass concentration 2.2% again, adds sulfuric acid and regulate pH=4 under 35 ± 2 DEG C of conditions, process 30min, and centrifuge washing is separated the alkaline bleached softwood pulp fibres obtaining needing;
2) raw materials weighing: alkaline bleached softwood pulp fibres, cotton pulp fiber and aramid fiber weigh each raw material components according to quality proportioning 95:4:1;
Respectively alkaline bleaching needle-point leaf pulp fiber and cotton pulp fiber are carried out making beating process, alkaline bleached softwood slurry slurry, cotton pulp slurry and the aramid fiber without making beating are made into mixed slurry 9000kg; The beating degree 39.5oSR of alkalescence bleaching needle-point leaf pulp slurry; The beating degree 41.5oSR of cotton pulp slurry; With deflaker, mixed slurry is discongested;
3) paper stock preparation: add 1800kg pearl filler in the mixed slurry after discongesting, add sizing agent 27kg successively, brightening agent stilbene biphenyl sodium disulfonate 6.3kg, retention agent polyacrylamide 2.7kg, is made into paper stock;
4) online paper stock concentration 0.6% is controlled, online paper stock pH:8.0; Slurry network speed is than 1.00; Paper stock through fourdrinier wire dehydration, squeezing, drying, press polish ornamenting, batch, rewinding obtains archival paper, described press polish ornamenting adopts contact pressurization;
5) obtained archival paper is 107% according to the whiteness that iso standard measures; Tearability 1212mN; Become the Kappa number 1.27 of paper.
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| CN107513881A (en) * | 2017-08-30 | 2017-12-26 | 山东秦世集团有限公司 | A kind of antibacterial archival paper and preparation method thereof |
| CN109333717A (en) * | 2018-09-25 | 2019-02-15 | 浙江云峰莫干山装饰建材有限公司 | A kind of whitening fluid for recombinant decorative veneer |
| CN111472196A (en) * | 2020-04-10 | 2020-07-31 | 浙江科技学院 | Durable manual writing and painting paper filled with micro-nano calcium and preparation method thereof |
| CN116145467A (en) * | 2022-12-30 | 2023-05-23 | 中冶美利云产业投资股份有限公司 | Production process of low-cost high-grade special paper |
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| CN1834348A (en) * | 2005-03-18 | 2006-09-20 | 天津金证造纸有限公司 | Archival paper and its mfg. method |
| CN100510257C (en) * | 2006-04-26 | 2009-07-08 | 邱晓刚 | Process for repairing ancient books, paintings and calligraphy and paper literatures by using paper pulp |
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