Summary of the invention
The object of this invention is to provide a kind of quantitatively low, tensile strength is high, internal bond strength good, smoothness is high, water imbibition is little, surface strength is good, digital printing is effective, paper is fine and smooth, good hand touch, can substitute paper in common logistic label completely, thereby the manufacture method of the rich body paper of product reducing production costs for client.
The technical solution used in the present invention is: the manufacture method of the rich body paper of a kind of product, comprise use softwood pulp, hardwood pulp through making beating respectively, with slurry and auxiliary material adds, l Water Paper page is manufactured paper with pulp, front dry, top sizing processing, after the processing step such as dry, press polish ornamenting, it is characterized in that:
(1) sulfate bleaching needle-point leaf pulp, sulfate bleached hardwood pulp, three kinds of slurry weight proportionings of chemi-mechanical pulp are: sulfate bleaching needle-point leaf pulp: sulfate bleached hardwood pulp: chemi-mechanical pulp=(18~20%): (76~70%): (6~10%), the beating degree of three kinds of slurries: softwood pulp 60~650SR; Hardwood pulp 60~650SR; Chemi-mechanical pulp 55~600SR;
(2) supplementary product consumption is: (a) AKD:15~20kg/ ton paper; (b) filler: 140~150kg/ ton paper; (c) cationic starch in slurry: 15~20kg/ ton paper, retention agent PAM:0.3~0.4kg/ ton paper, organic fine particles: 0.2~0.25kg/ ton paper, bentonite: 2~2.5kg/ ton paper;
(3) glue-applying technique: surface sizing starch 40~55kg/ ton paper, sizing material concentration 14%; Solid Organic toner 4~6kg/ ton paper, butter 8~12kg/ ton paper; Two sides top sizing one side is controlled at 1.5~2g/m2, page tension force 220N/m before applying glue portion2, page tension force 200N/m after applying glue portion2;
(4) other parameters of paper machine: network speed 1280m/min, top net dehydrating amount 27%, head box opening degree of slice lip 9.7mm, one line ball pressure: 900kN/m, two line ball pressure: 900kN/m, curling tension force: 400kN/m, rolling condition: 120~130 DEG C of left and right of calender steel rod temperature, linear pressure is 75~80kN/m;
(6) the rich body paper of product is quantitative: 41~50g/m2, moisture 5.0~6.0%, form and aspect raw white ISO, longitudinally fracture length >=7.0Km, internal bond strength >=400J/m2, ash content≤15%, smoothness mean value >=100S, water imbibition is little≤22g/m2, lateral extensometer shrinkage≤3.0%, it is good that thickness is stable, formation of sheet is good, surface strength is good, outward appearance is fine and smooth, touch feeling is good, planarization is good, body paper hides performance after isolating oil or be coated with PVA through digital printing, painting, develops the color full.
The weight ratio that adds of Solid Organic toner of the present invention and butter is 1:1~3, and the mode that adds is to join in gelatinized starch solution, wherein after mixing: butter is one or more in magnesium chloride, calcium chloride, sodium chloride.
Because the present situation of paper in the logistic label of domestic use is that kind is more assorted, taking all wood paper product as main, also have some products containing DIP slurry and straw pulp; These product technology contents are not high, product specification is on the low side (outward appearance has dust, smoothness is low, surface strength is poor, surface exquisiteness, digital printing weak effect etc. not), quantitatively general paper high expensive (as: 60 grams of products in (60 grams is main above) bigger than normal, single label, 6000 yuan/ton of prices, every square of cost is 0.360 yuan).
Applicant is in order to find one quantitatively low, tensile strength is high, internal bond strength is good, smoothness is high, water imbibition is little, surface strength is good, digital printing is effective, paper exquisiteness, good hand touch, can substitute the rich body paper of product of paper in common logistic label completely, paper---the rich body paper of-product in the logistic label that starts to develop for 2015, main research and innovation: the requirement of (i) falling cost according to client, research and develop in low quantitative logistic label paper product (under the prerequisite that meets instructions for use, develop the rich body paper of low quantitative product), both reduced paper using amount, having saved again logistics transportation expense has reached client and has fallen cost object. (ii) from slurry selection, beating process and paper technology research and innovation, the product quality of the rich body paper of product of PM9 exploitation significantly better than common label in paper, main research comprises: 1. study grout structure, taking commodity sulfate bleached wood pulp as primary raw material, add a small amount of high quality machine to starch to improve page thickness and deflection. in common label, paper product generally contains part reed pulp, straw pulp or Deinking Pulp, and paper has dust and rubbish. 2. study best wet end furnish, chamber handsheet and the research with slurry of paper machine by experiment, determines best wet end furnish scope----softwood pulp: hardwood pulp: change machine slurry=(18~20): (76~70): (6~10). 3. study best beating degree control range, in order to allow the rich body paper of low quantitative product reach equal intensity index, we are from the beating process research of starting with, by adopting shiny beating mode test of many times to regulate beating degree and laboratory handsheet to detect tensile strength and the internal bond strength of paper, finally determine that best beating degree control range is (as broad-leaved slurry beating degree control 60~650SR, needle slurry beating degree control 60~650SR), reached the object that improves tensile strength, internal bond strength and the evenness of paper. 4. the addition (mill run cationic starch addition is 8~10kg/ ton paper, and the addition of the rich body paper of product is brought up to 15~20kg/ ton paper) of cationic starch in research slurry, also can obviously improve paper internal bond strength. 5. adopt film transitional surface applying glue equipment to carry out top sizing processing, after groping by many experiments research, add ink printing set class chemicals, as organic color-fixing agent, butter (magnesium chloride, calcium chloride, sodium chloride) etc., choose 1~3 kind of chemicals, after mixing according to the different proportioning in 1:1~3, join in gelatinized starch solution, can effectively improve digital printing effect, ink set and the ink setting speed of paper in logistic label; Control one side resin added at 1.5~2g/m2, can improve preferably paper sheet stiffness, paper surface properties and printing performance. 6. study the dryer temperature curve of paper machine water desorption curve and drying section, wet end vacuum and drying section dryer temperature to paper machine regulate and optimize, and make best dewatering process parameter; Adopt the mode of soft calender and increase press polish linear pressure and improve paper smoothness. Therefore the rich body paper of product has good planarization. (iii) product structure innovation transition, promotes company's profitability (respond the call of company, product structure is made the transition to industrial paper by Cultural Paper, and the rich body paper rate of gross profit of product is apparently higher than company's existing product); Also reduced the production cost of client's logistic label, be an industrial paper new product that is worth exploitation simultaneously.
The paper machine that the application adopts is PM9 paper machine, has given full play to the equipment advantage of foreign paper machine, can on the basis that meets Customer Quality requirement, reduce production costs simultaneously. PM9 is the high speed paper production line from external a complete set of of introducing with the leading level in the world, with respect to common paper machine, the product of PM9 paper machine has following advantage: wet end sheet forming is good, evenness is good, longitudinal basis weight fluctuation is little, with the comparison of same grammes per square metre product, there is the advantages such as tensile strength is large, surface strength is high, the fine and smooth property of paper is good.
Several features of the rich body paper of product are exactly: brisement quantitatively less than normal, longitudinal is grown up (>=7.0Km), the little (≤22g/m of water imbibition2), the large (>=400J/m of internal bond strength2), smoothness high (>=100s), formation of sheet is good, outward appearance is fine and smooth, planarization is good, touch feeling is good etc., body paper, to hide performance through digital printing, after being coated with isolation oil or being coated with PVA good, develops the color full. Good with the isolation effect of base stock Ge Laxin paper.
The present invention is by selecting slurry, wet end furnish, beating process, the functionalized chemical auxiliary agent and the digital printing auxiliary agent that in slurry, add are studied, adopt film transitional surface applying glue processing, carry out the measures such as press polish by soft calendaring equipment, carry out to produce the rich body paper of qualified product with reference to relevant paper machine parameter, compared with paper in common logistic label, the rich body paper of product has quantitatively low, tensile strength is high, internal bond strength is good, smoothness is high, water imbibition is little, surface strength is good, digital printing is effective, paper exquisiteness, good hand touch, can substitute paper in common logistic label completely, and can reduce production costs for client, company is optimized product structure and to promote company's profitability significant.