Light-duty printing paper and manufacture method thereof
One, technical field:
The present invention relates to a kind of printing paper and manufacture method thereof.
Two, background technology:
Light paper belongs to extraordinary book and periodical printing paper, has color and luster soft naturally (ecru), (bulk generally is not less than 1.5cm to the papery bulky
3/ characteristics such as g).Light paper is that high mixture ratio machine slurry is joined and copied, and the slurrying pollutional load is little, mainly by fiber, CaCO
3Form with water, whitewater closure circulation, the no three wastes, product 100% no chlorine does not contain brightening agent, and long-time reading can not cause visual fatigue and injury.Secondly, sense organ is more comfortable, and light paper belongs to uncoated paper, has all natural characteristics of paper, and its paper products ultralight is super thick, has demonstrated fully economical and practical characteristics.Its level and smooth and lacklustre surface makes printing have more third dimension, and paper is easier to be write.Its that cream-coloured dim gloss makes image more clear, opacity height, the easier reading of books, and third dimension is strong, can reduce the fatigue of eyes.More clear with the books that light paper prints off, photon absorbing intensity is better, to prevention students in middle and primary schools myopia, follow-on healthy the playing a role of protection.Moreover not only economy but also material benefit can replace the book that 100 gram wood-free papers are done same thickness with 60 gram light papers, and cost are low, has obtained outstanding printing effect and comfort feel simultaneously, and higher opacity, and Cheng Shuke saves freight charges and postage.In addition, the use of light paper is most important to follow-on health, has reduced the burden that the student endorses and wraps by adopting light paper, make the student avoid heavy burden and easily go to school, be aided with soft optical color simultaneously, improve student's the interest of going to school, have long-range development meaning cultivating the next generation.
Abroad, light paper is mainly as books paper.In recent years, employing light paper printings mostly such as more domestic top-quality books, situation of selling well books such as literature is classical, world's masterpiece, social sciences elaboration, famous person's biography, books are in great demand, turnover is fast, and light paper has become the hot topic in books markets such as Beijing.The printing of employing light paper had both met international trend, can attract the reader again, and therefore, light paper has bright development prospect as books with paper.
Light paper has the unexistent advantage of other paper: can substitute import fully and cover willing paper, price is lower by nearly 1/3 than import; Bulk is big: the two glue bulks of standard are little, and the light paper bulk is big, and the light paper of same thickness is compared with common offset paper, goes out a rate height, has reduced cost; Form and aspect are soft, the no-reflection effect, and printed matter has protective effect to eyesight; The paper transversely deforming is little, is fit to polychrome printing, and oil absorbency is good, and the printing third dimension is abundant, and printed matter is high-grade elegant; Adopt neutral sizing, but print the books long preservation; Surface strength is big, is suitable for high speed printing; Become book in light weight, saved postage, freight charges; 100% wood pulp production does not add brightening agent, the tool environmental-protecting performance.
Domestic and international light paper all adopts the chemical pulp of full chemi-mechanical pulp or adapted about 10% to join and copies.Our company especially is being in the leading level in the world aspect the italian poplar APMP slurrying aspect the chemi-mechanical pulp production, and the Italian poplar APMP pulp that has an independent intellectual property right with our company joins with CTMP slurry, DIP slurry that the light-duty printing paper of copying has papery bulky, opacity height, the surface is fine and smooth and matt, soft, the simple natural characteristics of color.
Three, summary of the invention:
The purpose of this invention is to provide a kind of light-duty printing paper and manufacture method thereof, the light-duty printing paper of producing has deflection, bulk, opacity height, the surface is fine and smooth and matt, soft, the simple nature of color and manufacturing technique are simple, the characteristics that manufacturing cost is lower.
For achieving the above object, technical scheme of the present invention is as follows: a kind of light-duty printing paper is characterized in that:
(1) slurry is italian poplar alkaline hydrogen peroxide thermomechanical pulp APMP slurry, CTMP slurry and deinking slurry DIP, and slurry weight proportioning Italy poplar APMP pulp: CTMP slurry: deinking slurry DIP is 70-30: 20-50: 20-0
(2) supplementary product consumption is: (A) AKD consumption 0.1-0.25% (to oven dry stock); (B) amount of filler 5-12%; (C) cationic starch consumption 0.8-1.2%, retention agent PAM consumption 200-400ppm;
The manufacture method of described light-duty printing paper comprises with Italian poplar APMP pulp, CTMP slurry, deinking slurry DIP adapted after pulling an oar respectively and manufactures paper with pulp, and through the press polish ornamenting, it is characterized in that:
(1) slurry selects for use Italian poplar APMP pulp, CTMP slurry, deinking slurry DIP to be modulated to mixed pulp by above-mentioned weight proportion; It has kowtowed slurry (making beating back) beating degree: Italian poplar APMP pulp 50-70 ° SR; CTMP starches 55-70 ° of SR; 45-55 ° of SR of deinking slurry DIP;
(2) adding auxiliary material by above-mentioned supplementary product consumption is mixed with paper stock and adopts neutral sizing in the slurry;
(3) paper stock through fourdrinier wire dehydration, squeezing, dry press polish ornamenting, batch, rewinding makes, online slurry concentration 0.65-0.80%, online slurry pH:8.0-8.5; Rolling condition: deadweight pressurization;
(4) 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 70%, and opacity is greater than 82%, and bulk is not less than 1.8m
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, and surperficial pH value is greater than 7.0.
Manufacturing technique of the present invention is simple, and manufacturing cost reduces, this product adapted the meaning poplar APMP of my company's independent intellectual property right; Adopt advanced production technologies such as the interior neutral sizing of slurry.Its product has deflection, bulk, opacity height, and printing effect is good, and form and aspect are soft, the no-reflection effect, and printed matter has outstanding features such as protective effect to eyesight.To compare the light paper bulk big with the standard wood-free paper, goes out a rate height, reduced cost.The paper transversely deforming is little, is fit to polychrome printing, and oil absorbency is good, and the printing third dimension is abundant, and printed matter is high-grade elegant, be top-quality book, situation of selling well books such as printings such as literature is classical, world's masterpiece, social sciences elaboration, famous person's biography preferentially use paper.When light-duty printing paper in enormous quantities is produced, manufacture paper with pulp smoothly, the operation of paper feeding machine does not increase difficulty, and paper forming rate has been reached more than 98%; It is good to have printing effect, moderate advantage, and market potential is wide.
Four, the specific embodiment
Embodiment 1:
Italian poplar APMP pulp, the CTMP slurry beaten respectively to suitable beating degree are modulated the 900kg mixed pulp by 70: 30 proportionings, add 80kg talcum powder and suitable other chemical assistant (the about 2kg of total amount) and be mixed with paper stock, paper stock dewaters through fourdrinier wire, squeezing, dry press polish ornamenting, batch, rewinding gets light-duty printing paper 1000kg.The online concentration of manufacturing paper with pulp 0.65-0.80%; The slurry network speed is than about 1.02; Online slurry pH value 8.5; Become the paper roll water intaking to divide and be controlled at 6-8%.The light-duty printing paper that makes quantitatively is 70g/m
2, moisture is 6.8%, whiteness (ISO) 73%, opacity 85%, bulk 1.8m
3/ kg, the surface absorbs weight 28g/m
2, the vertical 3500m of fracture length roll web, laterally folding strength is 5 times, lateral extensometer shrinkage 2.8%, print surface intensity 2.0m/S, ash content 8%, surperficial pH value 7.8.
Embodiment 2:
The Italian poplar APMP pulp, CTMP slurry, the deinking slurry DIP that beat respectively to suitable beating degree are modulated the 900kg mixed pulp by 55: 25: 20 proportionings, add 80kg talcum powder and suitable other chemical assistant (the about 2kg of total amount) and be mixed with paper stock, paper stock dewaters through fourdrinier wire, squeezing, dry press polish ornamenting, batch, rewinding gets light-duty printing paper 1000kg.The online concentration of manufacturing paper with pulp 0.65-0.80%; The slurry network speed is than about 1.02; Online slurry pH value 8.5; Become the paper roll water intaking to divide and be controlled at 6-8%.The light-duty printing paper that makes quantitatively is 60g/m
2, moisture is 6.2%, whiteness (ISO) 76%, opacity 84%, bulk 1.7m
3/ kg, the surface absorbs weight 26g/m
2, the vertical 3300m of fracture length roll web, laterally folding strength is 5 times, lateral extensometer shrinkage 2.8%, print surface intensity 2.0m/S, ash content 7%, surperficial pH value 7.5.