CN104389235A - Low-quantification and high-strength coating white board paper and preparation process thereof - Google Patents
Low-quantification and high-strength coating white board paper and preparation process thereof Download PDFInfo
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Abstract
Embodiments of the present invention disclose low-quantification and high-strength coating white board paper and a preparation process thereof. The low-quantification and high-strength coating white board paper comprises raw paper and a surface coating layer, wherein the surface coating layer further comprises a pre-coating, a middle coating and a surface coating, the coating materials of the pre-coating and the middle coating comprise 70-90% of calcium carbonate, 10-30% of kaolin, 0.1-0.3% of a dispersant, 8-12% of an adhesive, 0.3-0.7% of a water resistant agent, and 0-0.5% of a lubricant, and the coating materials of the surface coating comprise 50-70% of calcium carbonate, 20-50% of kaolin, 0-10% of a plastic pigment, 0.1-0.3% of a dispersant, 10-14% of an adhesive, 0.4-1.0% of a water resistant agent, and 0.4-1.0% of a lubricant. According to the present invention, with the optimized design of the pulps in each layer of the coating white board paper, the core pulp ratio is preferably selected, the coating material formula and the filler adding process are improved, the reliable film transfer type surface sizing is adopted, and the low-quantification and the high-strength of the paper board are ensured.
Description
Technical field
The invention belongs to pulp technology for making paper, particularly a kind of light basis weight high strength coated manila and preparation technology thereof.
Background technology
Recently along with the enhancing of people's environmental consciousness, requiring more and more higher, economize on resources, energy-saving and emission-reduction to " low-carbon economy ", is the fundamental state policy of China's sustainable development.The arrival in low-carbon economy epoch, the degree of concern of paper-making industry to environmental protection and sustainable development also grows to even greater heights, and also forces the innovation of the transformation of paper industry intrinsic notion and existing production Technology.In the face of global problems such as shortage of resources, energy shortage, environmental pressure are large, paper industry science and technology overall development trend will economizing on resources, realizing cycle development; Improve energy utilization rate, realize low carbon development; Implement cleaner production, realize pollutant and effectively control and develop the strategic problems such as following new product, as the emphasis direction of research and development.Paper industry belongs to typical demand pull type industry, is a key point considering degree of national civilization and modernization level, and the horizontal reverse of paper consumption has answered science and technology and the economic development level in a region.Papermaking industry has the larger degree of association, and upstream relates to the industries such as forestry, chemical industry, machinery, and downstream relates to culture life articles for use, printing, packaging etc.In recent years, paper industry constantly to be manufactured paper with pulp development to maximization, high speed, neutralisation, also heads on raw material in short supply, the pressure of the aspects such as environmental pollution simultaneously.The multiple pressure that enterprise faces is upgraded, and main cause is that the prices of raw and semifnished materials are becoming tight finance costs in increasing, the rise of derived energy chemical raw material etc. in rise, the price of labour power in rising, fund.In today of paper industry high speed development, quality and cost are the keys seized competitive advantage.How continuing to reduce costs, improve output is the problem that all paper plants are concerned about for a long time.
China's papermaking industry is very strong to the dependence of material inlet, and China is comparatively large by the impact that world's fibrous raw material is in short supply, estimates that future world wood pulp and waste paper price still can Continueds.Although wait developed countries and regions paper industry production capacity in atrophy gradually American-European, China is in process of industrialization, is increasing year by year the demand of paper and paperboard.Output and the consumption figure of paper and paperboard in 2009 exceed the U.S. first, occupy first place in the world, and still keep this level so far, and Chinese papermaking industry is just entering industry and increasing fast traffic lane.Have environmental protection, can natural degradation and the paper products market of reuse capable of circulation also progressively expand, these factors all impel global paper fibre resource provisioning day to be becoming tight.
Until produce and transit link from fibrous raw material to chemical assistant, papermaking enterprise takes the trial that low-carbon economy is carried out in all behaves.At present, the common recognition that domestic industry is general is Appropriate application non-wood-fiber resource, the recovery improving waste paper and utilization rate.But another trend in positive effect aspect, namely improves the utilization rate of fibre resources, reduce paper weight per unit area, allow limited paper pulp raw material produce the Paper or cardboard that more multiaspect is long-pending.Under the prerequisite not affecting the various physical property of paper, optical property, service performance, reduce Substance as far as possible, become the selection of many papermaking enterprises.
According to " paper industry technological progress " 12 " instruction ": strive realizing a collection of paper of exploitation and cardboard new product in pulping and paper-making scientific and technological development and technological innovation field, push forward paper and cardboard various product comprehensively to differentiation, seriation, lightweight, functionalization future development, meet market light basis weight, environmental protection demand, form industry development new growth point, wherein low grammes per square metre wrapping paper and cardboard become important research and development problem.Light basis weight high strength just refers to innovation by production technology and improvement, the paper using of packaging product is quantitatively obviously reduced, and the bulk strength of product remains unchanged or increases, and the production cost of product obtains decline to a certain extent, and the economic benefit of enterprise is improved.The innovation that paper wrapper is produced and improvement comprise the aspects such as Production design, production technology, production technology, production equipment and raw material.Body paper quantitatively reduces, and production cost also reduces, but the quality of finished product still reaches standard compliant basic demand.The definition of paper wrapper product light basis weight high strength that Here it is is also the inevitable development trend of recycling economy.Paper and paperboard light basis weight, will cause thickness to reduce, finally cause write printing paper intensity, opacity, deflection reduce and strikethrough problems; The deflection of cardboard and ring crush intensity is made to meet following process or instructions for use etc.The reduction that particularly paper is quantitative, has higher requirement also to the original technology of manufacturing enterprise.
For above problem, be necessary to study in fact, to provide a kind of light basis weight high strength coated manila and preparation technology thereof, make the stable production process of light basis weight high strength white board, paper product quality is high.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of light basis weight high strength coated manila and preparation technology thereof, by the optimal design of each layer slurry of coated manila, preferred core slurry proportioning, the formulation for coating material of improvement and filler adding technology, reliable film transfer type top sizing, ensure the light basis weight high strength of cardboard, hard, the soft calender calendaring technology of crown control guarantees that paper banner is even.
For achieving the above object, technical scheme of the present invention is:
A kind of light basis weight high strength coated manila, comprise body paper and surface coating layer, wherein surface coating layer comprises again precoated shet, floating coat and finishing coat, and wherein the coating levels of precoated shet, floating coat is calcium carbonate 70-90%, kaolin 10-30%, dispersant 0.1-0.3%, adhesive 8-12%, water repellent agent 0.3-0.7%, lubricant 0-0.5%, coating solids control 66-70%, upper painting amount controls at 15-20g/m2; The coating levels of finishing coat is calcium carbonate 50-70%, kaolin 20-50%, plastic pigments 0-10%, dispersant 0.1-0.3%, adhesive 10-14%, water repellent agent 0.4-1.0%, lubricant 0.4-1.0%, the control of painting coating solid content is at 60-65%, and upper painting amount controls at 10-15g/m
2.
Preferably, described body paper comprises surface starch glue application layer, bottom waste paper pulp layer, sandwich layer waste paper pulp layer, lining waste paper pulp layer and surface layer bleached chemical pulp layer, and each layer slurry dispense control is, surface layer bleached chemical pulp layer 25-30g/m
2, lining waste paper pulp layer 25-30g/m
2, bottom waste paper pulp layer 25-30g/m
2, sandwich layer sendout is remainder, and the trimmed size of white board is grammes per square metre 230 ± 5g/m
2.
Preferably, described surface starch glue application layer uses film transfer type surface sizing technique, and surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10-15% into, gelatin concentration control 12-18%, viscosity control 40-80cps, spread control 3-5g/m
2.
Preferably, described surface layer bleached chemical pulp layer comprises bleached hardwood pulp and bleaching needle-point leaf pulp, and wherein the proportional quantity of bleached hardwood pulp is 50-60%, and the proportional quantity of bleaching needle-point leaf pulp is 40-50%, and slurries beating degree controls at 40-45 ° of SR.
Preferably, give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, proportioning is respectively AOCC and accounts for 40-50%, and EOCC accounts for 40-50%, and LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.
Preferably, in surface layer, add the precipitated calcium carbonate filler with polyacrylamide modification, addition 5-15%, control filler retention 60-70%, improve body paper whiteness at 68-72%.
Another technical scheme of the present invention is:
A kind of light basis weight high strength coated manila preparation technology, comprises the following steps:
(1) surface layer bleached wood pulp preparation
The bleaching commercial wood pulp plate of bleached hardwood pulp LBKP and bleaching needle-point leaf pulp NBKP is transported to hydrabrusher size degradation by chain mat machine, then storage in pulp storage tower is entered, slurry is by being pumped into high concentration desanding device except heavy seeds, send to slurry again after fiberizer series connection making beating, as the surface layer bleached chemical pulp layer of cardboard;
(2) secondary stock preparation
Waste paper is transported to drum type pulp kneader size degradation by chain mat machine, then enters storage in pulp storage tower, and slurry by being pumped into high concentration desanding device except heavy seeds, then send pulping to store through purification, fine screen, concentrated, dirt count, fiberizer series connection after pulling an oar;
(3) stratified slurry preparation is with shaping
The slurry sent here by slip house, add the auxiliary material comprising retention agent and reinforcing agent, reinforcing agent mainly adds surface layer slurry, the each layer of retention agent all needs to add, then sends into the outer back flow water pump of paper machine machine and enriched water mixed diluting through frequency control stock pump, delivers to pressurized screen screen by fan pump, then head box is entered, each layer approach flow concentration controls: surface layer: 0.3-0.4%, lining, bottom 0.4-0.5%, sandwich layer 0.6-0.8%; After approach flow, coating system is entered after four folded net shapings, squeezing, drying, top sizing, again drying, press polish, at the bottom of the lining core of face, each layer slurry dispense amount controls, the body paper so made is again after top sizing, surface layer precoating, middle painting and face are coated with, after hot air drier drying, enter debugging mode cylinder and soft calendaring ornamenting, horizontal reel machine batches and sent workshop section, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10-15% into, gelatin concentration control 12-18%, viscosity control 40-80cps, spread control 3-5g/m
2, wherein the coating levels of precoated shet, floating coat is calcium carbonate 70-90%, kaolin 10-30%, dispersant 0.1-0.3%, adhesive 8-12%, water repellent agent 0.3-0.7%, lubricant 0-0.5%, coating solids control 66-70%, upper painting amount controls at 15-20g/m2; The coating levels of finishing coat is calcium carbonate 50-70%, kaolin 20-50%, plastic pigments 0-10%, dispersant 0.1-0.3%, adhesive 10-14%, water repellent agent 0.4-1.0%, lubricant 0.4-1.0%, the control of painting coating solid content is at 60-65%, and upper painting amount controls at 10-15g/m2, the paper roll that reel machine gets off, part send roll web packaging production line after rewinding machine rewinding.
Preferably, after top sizing drying, the hard calender of crown control is adopted to control cardboard banner thickness, roughness uniformity at body paper, wherein hard calendering temperature 120-180 DEG C, linear pressure 30-50KN/M; After being coated with drying, the soft press-polishing machine of crown control is adopted to control sheet gloss degree, roughness uniformity at body paper, wherein soft calendaring temperature 100-150 DEG C, linear pressure 15-35KN/M.
Preferably, in wet web press dewatering process, adopt wide nip formula shoe press technology, control squeezing linear pressure 650-750KN/M.
Preferably, give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, proportioning is respectively AOCC and accounts for 40-50%, and EOCC accounts for 40-50%, and LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.
Compared with prior art, beneficial effect of the present invention is as follows: by the optimal design of each layer slurry of coated manila, preferred core slurry proportioning, the formulation for coating material of improvement and filler adding technology, reliable film transfer type top sizing, ensure the light basis weight high strength of cardboard, hard, the soft calender calendaring technology of crown control guarantees that paper banner is even.
Accompanying drawing explanation
Fig. 1 is the interlayer structure schematic diagram of the light basis weight high strength coated manila of the embodiment of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
On the contrary, the present invention is contained any by the substituting of making on marrow of the present invention and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the present invention, in hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.
See Fig. 1, be depicted as the interlayer structure schematic diagram of the light basis weight high strength coated manila of the embodiment of the present invention, comprise body paper 10 and surface coating layer 20, wherein surface coating layer comprises again precoated shet 201, floating coat 202 and finishing coat 203, wherein the coating levels of precoated shet 201, floating coat 202 is calcium carbonate 70-90%, kaolin 10-30%, dispersant 0.1-0.3%, adhesive 8-12%, water repellent agent 0.3-0.7%, lubricant 0-0.5%, coating solids control 66-70%, upper painting amount controls at 15-20g/m
2; The coating levels of finishing coat is calcium carbonate 50-70%, kaolin 20-50%, plastic pigments 0-10%, dispersant 0.1-0.3%, adhesive 10-14%, water repellent agent 0.4-1.0%, lubricant 0.4-1.0%, the control of painting coating solid content is at 60-65%, and upper painting amount controls at 10-15g/m
2.By the light basis weight high strength coated manila arranged above, its quantitative 230 ± 5.0g/m
2, lateral stiffness>=2.5mN/m, bursting strength>=530kPa, ring crush intensity>=2200N/m, picking speed>=3m/s, surface smoothness>=180s.
In one embodiment, body paper 10 comprises surface starch glue application layer 101, bottom waste paper pulp layer 102, sandwich layer waste paper pulp layer 103, lining waste paper pulp layer 104 and surface layer bleached chemical pulp layer 105, and each layer slurry dispense control is, surface layer bleached chemical pulp layer 25-30g/m
2, lining waste paper pulp layer 25-30g/m
2, bottom waste paper pulp layer 25-30g/m
2, sandwich layer sendout is remainder, and the trimmed size of white board is grammes per square metre 230 ± 5g/m
2.That surface layer, lining, sandwich layer and bottom four layers of slurry adopt independently pulping respectively and pulp feeding system, strengthening wet end furnish, takes into account intensity and evenness, realizes the key of light basis weight high strength.By the body paper arranged above, wherein bottom, sandwich layer and lining all adopt waste paper as raw material, have greatly saved the cost of raw material, and can reduce the consumption of timber, substantially increased environmental friendliness.Give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, and proportioning is respectively AOCC and accounts for 40-50%, and EOCC accounts for 40-50%, and LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.In surface layer, add the precipitated calcium carbonate filler with polyacrylamide modification, addition 5-15%, control filler retention 60-70%, improve body paper whiteness at 68-72%.
In embody rule example, surface starch glue application layer uses film transfer type surface sizing technique, and surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10-15% into, gelatin concentration control 12-18%, viscosity control 40-80cps, spread control 3-5g/m
2.
In embody rule example, surface layer adopts bleached wood pulp, and lining is made up of 100% light pulp from decoloured waste paper, and bottom is made up of mixed waste paper short fiber, and sandwich layer is made up of the mixing long and short fiber of high strength OCC secondary stock and certain proportioning.Top sizing layer is made up of front glue application layer and back side glue application layer, the starch etc. after boiling is included in front glue application layer and back side glue application layer, combine the raw material and waste material that adopt the low costs such as calcium carbonate, talcum powder and kaolin, prepare the high performance coated white paperboard of light basis weight.Surface layer bleached chemical pulp layer comprises bleached hardwood pulp and bleaching needle-point leaf pulp, and wherein the proportional quantity of bleached hardwood pulp is 50-60%, and the proportional quantity of bleaching needle-point leaf pulp is 40-50%, and slurries beating degree controls at 40-45 ° of SR.
Corresponding with product embodiments, the preparation technology of the light basis weight high strength coated manila of further embodiment of this invention, it mainly comprises the following steps:
(1) surface layer bleached wood pulp preparation
The bleaching commercial wood pulp plate of bleached hardwood pulp LBKP and bleaching needle-point leaf pulp NBKP is transported to hydrabrusher size degradation by chain mat machine, then storage in pulp storage tower is entered, slurry is by being pumped into high concentration desanding device except heavy seeds, send to slurry again after fiberizer series connection making beating, as the surface layer bleached chemical pulp layer of cardboard;
Wherein the proportional quantity of bleached hardwood pulp is 50-60%, and the proportional quantity of bleaching needle-point leaf pulp is 40-50%, and slurries beating degree controls at 40-45 ° of SR
(2) secondary stock preparation
Waste paper is transported to drum type pulp kneader size degradation by chain mat machine, then enters storage in pulp storage tower, and slurry by being pumped into high concentration desanding device except heavy seeds, then send pulping to store through purification, fine screen, concentrated, dirt count, fiberizer series connection after pulling an oar;
Wherein give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, proportioning is respectively AOCC and accounts for 40-50%, and EOCC accounts for 40-50%, and LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.
(3) stratified slurry preparation is with shaping
The slurry sent here by slip house, add the auxiliary material comprising retention agent and reinforcing agent, reinforcing agent mainly adds surface layer slurry, the each layer of retention agent all needs to add, then sends into the outer back flow water pump of paper machine machine and enriched water mixed diluting through frequency control stock pump, delivers to pressurized screen screen by fan pump, then head box is entered, each layer approach flow concentration controls: surface layer: 0.3-0.4%, lining, bottom 0.4-0.5%, sandwich layer 0.6-0.8%; After approach flow, coating system is entered after four folded net shapings, squeezing, drying, top sizing, again drying, press polish, at the bottom of the lining core of face, each layer slurry dispense amount controls, the body paper so made is again after top sizing, surface layer precoating, middle painting and face are coated with, after hot air drier drying, enter debugging mode cylinder and soft calendaring ornamenting, horizontal reel machine batches and sent workshop section, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10-15% into, gelatin concentration control 12-18%, viscosity control 40-80cps, spread control 3-5g/m
2, wherein the coating levels of precoated shet, floating coat is calcium carbonate 70-90%, kaolin 10-30%, dispersant 0.1-0.3%, adhesive 8-12%, water repellent agent 0.3-0.7%, lubricant 0-0.5%, coating solids control 66-70%, upper painting amount controls at 15-20g/m
2; The coating levels of finishing coat is calcium carbonate 50-70%, kaolin 20-50%, plastic pigments 0-10%, dispersant 0.1-0.3%, adhesive 10-14%, water repellent agent 0.4-1.0%, lubricant 0.4-1.0%, the control of painting coating solid content is at 60-65%, and upper painting amount controls at 10-15g/m
2, the paper roll that reel machine gets off, part send roll web packaging production line after rewinding machine rewinding.
In embody rule example, after top sizing drying, the hard calender of crown control is adopted to control cardboard banner thickness, roughness uniformity at body paper, wherein hard calendering temperature 120-180 DEG C, linear pressure 30-50KN/M; After being coated with drying, the soft press-polishing machine of crown control is adopted to control sheet gloss degree, roughness uniformity at body paper, wherein soft calendaring temperature 100-150 DEG C, linear pressure 15-35KN/M.In wet web press dewatering process, adopt wide nip formula shoe press technology, control squeezing linear pressure 650-750KN/M, to guarantee the bulk that cardboard is good and deflection.Give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, and proportioning is respectively AOCC and accounts for 40-50%, and EOCC accounts for 40-50%, and LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.
Embodiment 1
(1) surface layer bleached wood pulp preparation
The bleaching commercial wood pulp plate of bleached hardwood pulp LBKP and bleaching needle-point leaf pulp NBKP is transported to hydrabrusher size degradation by chain mat machine, then storage in pulp storage tower is entered, slurry is by being pumped into high concentration desanding device except heavy seeds, send to slurry again after fiberizer series connection making beating, as the surface layer bleach chemical pulp aspect layer bleached chemical pulp layer of cardboard;
Wherein the proportional quantity of bleached hardwood pulp is 50%, and the proportional quantity of bleaching needle-point leaf pulp is 50%, and slurries beating degree controls at 40 ° of SR.
(2) secondary stock preparation
Waste paper is transported to drum type pulp kneader size degradation by chain mat machine, then enters storage in pulp storage tower, and slurry by being pumped into high concentration desanding device except heavy seeds, then send pulping to store through purification, fine screen, concentrated, dirt count, fiberizer series connection after pulling an oar;
(3) stratified slurry preparation is with shaping
The slurry sent here by slip house, add the auxiliary material comprising retention agent and reinforcing agent, reinforcing agent mainly adds surface layer slurry, the each layer of retention agent all needs to add, then sends into the outer back flow water pump of paper machine machine and enriched water mixed diluting through frequency control stock pump, delivers to pressurized screen screen by fan pump, then head box is entered, each layer approach flow concentration controls: surface layer: 0.3%, lining, bottom 0.4%, sandwich layer 0.6%; After approach flow, coating system is entered after four folded net shapings, squeezing, drying, top sizing, again drying, press polish, at the bottom of the lining core of face, each layer slurry dispense amount controls, the body paper so made is again after top sizing, surface layer precoating, middle painting and face are coated with, after hot air drier drying, enter debugging mode cylinder and soft calendaring ornamenting, horizontal reel machine batches and sent workshop section, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10% into, gelatin concentration controls 12%, viscosity control 40cps, spread control 3g/m
2, wherein the coating levels of precoated shet, floating coat is calcium carbonate 70%, kaolin 21.6%, dispersant 0.1%, adhesive 8%, water repellent agent 0.3%, and coating solids controls 66%, and upper painting amount controls at 15g/m
2; The coating levels of finishing coat is calcium carbonate 50%, kaolin 23.7%, plastic pigments 10%, dispersant 0.3%, adhesive 14%, water repellent agent 1.0%, lubricant 1.0%, and the control of painting coating solid content is 60%, and upper painting amount controls at 10g/m
2, the paper roll that reel machine gets off, part send roll web packaging production line after rewinding machine rewinding.
After top sizing drying, the hard calender of crown control is adopted to control cardboard banner thickness, roughness uniformity at body paper, wherein hard calendering temperature 120 DEG C, linear pressure 30KN/M; After being coated with drying, the soft press-polishing machine of crown control is adopted to control sheet gloss degree, roughness uniformity at body paper, wherein soft calendaring temperature 100 DEG C, linear pressure 15KN/M.In wet web press dewatering process, adopt wide nip formula shoe press technology, control squeezing linear pressure 650KN/M, to guarantee the bulk that cardboard is good and deflection.Give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, and proportioning is respectively AOCC and accounts for 40%, EOCC and account for 40%, LOCC and account for 20%, and after defibrination, beating degree controls at 35 ° of SR.
Embodiment 2
Its process is identical with embodiment 1, unlike:
(3) stratified slurry preparation is with shaping
The slurry sent here by slip house, add the auxiliary material comprising retention agent and reinforcing agent, reinforcing agent mainly adds surface layer slurry, the each layer of retention agent all needs to add, then sends into the outer back flow water pump of paper machine machine and enriched water mixed diluting through frequency control stock pump, delivers to pressurized screen screen by fan pump, then head box is entered, each layer approach flow concentration controls: surface layer: 0.4%, lining, bottom 0.5%, sandwich layer 0.8%; After approach flow, coating system is entered after four folded net shapings, squeezing, drying, top sizing, again drying, press polish, at the bottom of the lining core of face, each layer slurry dispense amount controls, the body paper so made is again after top sizing, surface layer precoating, middle painting and face are coated with, after hot air drier drying, enter debugging mode cylinder and soft calendaring ornamenting, horizontal reel machine batches and sent workshop section, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 15% into, gelatin concentration controls 18%, viscosity control 80cps, spread control 5g/m
2, wherein the coating levels of precoated shet, floating coat is calcium carbonate 81.1%, kaolin 10%, dispersant 0.1%, adhesive 8%, water repellent agent 0.3%, lubricant 0.5%, and coating solids controls 70%, and upper painting amount controls at 20g/m
2; The coating levels of finishing coat is calcium carbonate 59.1%, kaolin 20%, plastic pigments 10%, dispersant 0.1%, adhesive 10%, water repellent agent 0.4%, lubricant 0.4%, and the control of painting coating solid content is 65%, and upper painting amount controls at 15g/m
2, the paper roll that reel machine gets off, part send roll web packaging production line after rewinding machine rewinding.
After top sizing drying, the hard calender of crown control is adopted to control cardboard banner thickness, roughness uniformity at body paper, wherein hard calendering temperature 180 DEG C, linear pressure 50KN/M; After being coated with drying, the soft press-polishing machine of crown control is adopted to control sheet gloss degree, roughness uniformity at body paper, wherein soft calendaring temperature 150 DEG C, linear pressure 35KN/M.In wet web press dewatering process, adopt wide nip formula shoe press technology, control squeezing linear pressure 750KN/M, to guarantee the bulk that cardboard is good and deflection.Give up EOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC and Europe of U.S.A, and proportioning is respectively AOCC and accounts for 50%, EOCC and account for 50%, and after defibrination, beating degree controls at 40 ° of SR.
Embodiment 3
Its process is identical with embodiment 1, unlike:
(3) stratified slurry preparation is with shaping
The slurry sent here by slip house, add the auxiliary material comprising retention agent and reinforcing agent, reinforcing agent mainly adds surface layer slurry, the each layer of retention agent all needs to add, then sends into the outer back flow water pump of paper machine machine and enriched water mixed diluting through frequency control stock pump, delivers to pressurized screen screen by fan pump, then head box is entered, each layer approach flow concentration controls: surface layer: 0.4%, lining, bottom 0.5%, sandwich layer 0.8%; After approach flow, coating system is entered after four folded net shapings, squeezing, drying, top sizing, again drying, press polish, at the bottom of the lining core of face, each layer slurry dispense amount controls, the body paper so made is again after top sizing, surface layer precoating, middle painting and face are coated with, after hot air drier drying, enter debugging mode cylinder and soft calendaring ornamenting, horizontal reel machine batches and sent workshop section, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 13% into, gelatin concentration controls 16%, viscosity control 60cps, spread control 4g/m
2, wherein the coating levels of precoated shet, floating coat is calcium carbonate 75%, kaolin 13.7%, dispersant 0.3%, adhesive 10%, water repellent agent 0.7%, lubricant 0.3%, and coating solids controls 68%, and upper painting amount controls at 17g/m
2; The coating levels of finishing coat is calcium carbonate 51.2%, kaolin 35%, plastic pigments 0.1%, dispersant 0.2%, adhesive 12%, water repellent agent 0.8%, lubricant 0.7%, and the control of painting coating solid content is 62%, and upper painting amount controls at 13g/m
2, the paper roll that reel machine gets off, part send roll web packaging production line after rewinding machine rewinding.
After top sizing drying, the hard calender of crown control is adopted to control cardboard banner thickness, roughness uniformity at body paper, wherein hard calendering temperature 150 DEG C, linear pressure 40KN/M; After being coated with drying, the soft press-polishing machine of crown control is adopted to control sheet gloss degree, roughness uniformity at body paper, wherein soft calendaring temperature 130 DEG C, linear pressure 25KN/M.In wet web press dewatering process, adopt wide nip formula shoe press technology, control squeezing linear pressure 700KN/M, to guarantee the bulk that cardboard is good and deflection.Give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, and proportioning is respectively AOCC and accounts for 45%, EOCC and account for 45%, LOCC and account for 10%, and after defibrination, beating degree controls at 38 ° of SR.
The light basis weight coated manila produced by above embodiment, its concrete technical indicator is as follows: quantitative 230 ± 5.0g/m
2, lateral stiffness>=2.5mN/m, bursting strength>=530kPa, ring crush intensity>=2200N/m, picking speed:>=3m/s, surface smoothness:>=180s.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a light basis weight high strength coated manila, it is characterized in that, comprise body paper and surface coating layer, wherein surface coating layer comprises again precoated shet, floating coat and finishing coat, wherein the coating levels of precoated shet, floating coat is calcium carbonate 70-90%, kaolin 10-30%, dispersant 0.1-0.3%, adhesive 8-12%, water repellent agent 0.3-0.7%, lubricant 0-0.5%, coating solids control 66-70%, upper painting amount controls at 15-20g/m
2; The coating levels of finishing coat is calcium carbonate 50-70%, kaolin 20-50%, plastic pigments 0-10%, dispersant 0.1-0.3%, adhesive 10-14%, water repellent agent 0.4-1.0%, lubricant 0.4-1.0%, the control of painting coating solid content is at 60-65%, and upper painting amount controls at 10-15g/m
2.
2. light basis weight high strength coated manila according to claim 1, it is characterized in that, described body paper comprises surface starch glue application layer, bottom waste paper pulp layer, sandwich layer waste paper pulp layer, lining waste paper pulp layer and surface layer bleached chemical pulp layer, each layer slurry dispense control is, surface layer bleached chemical pulp layer 25-30g/m
2, lining waste paper pulp layer 25-30g/m
2, bottom waste paper pulp layer 25-30g/m
2, sandwich layer sendout is remainder, and the trimmed size of white board is grammes per square metre 230 ± 5g/m
2.
3. light basis weight high strength Special coating white according to claim 2, it is characterized in that, described surface starch glue application layer uses film transfer type surface sizing technique, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10-15% into, gelatin concentration control 12-18%, viscosity control 40-80cps, spread control 3-5g/m
2.
4. light basis weight high strength Special coating white according to claim 2, it is characterized in that, described surface layer bleached chemical pulp layer comprises bleached hardwood pulp and bleaching needle-point leaf pulp, wherein the proportional quantity of bleached hardwood pulp is 50-60%, the proportional quantity of bleaching needle-point leaf pulp is 40-50%, and slurries beating degree controls at 40-45 ° of SR.
5. light basis weight high strength coated manila according to claim 2, it is characterized in that, give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, proportioning is respectively AOCC and accounts for 40-50%, EOCC accounts for 40-50%, LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.
6. light basis weight high strength coated manila according to claim 2, it is characterized in that, in surface layer, add the precipitated calcium carbonate filler with polyacrylamide modification, addition 5-15%, control filler retention 60-70%, improve body paper whiteness at 68-72%.
7. a light basis weight high strength coated manila preparation technology, is characterized in that, comprise the following steps:
(1) surface layer bleached wood pulp preparation
The bleaching commercial wood pulp plate of bleached hardwood pulp LBKP and bleaching needle-point leaf pulp NBKP is transported to hydrabrusher size degradation by chain mat machine, then storage in pulp storage tower is entered, slurry is by being pumped into high concentration desanding device except heavy seeds, send to slurry again after fiberizer series connection making beating, as the surface layer bleached chemical pulp layer of cardboard;
(2) secondary stock preparation
Waste paper is transported to drum type pulp kneader size degradation by chain mat machine, then enters storage in pulp storage tower, and slurry by being pumped into high concentration desanding device except heavy seeds, then send pulping to store through purification, fine screen, concentrated, dirt count, fiberizer series connection after pulling an oar;
(3) stratified slurry preparation is with shaping
The slurry sent here by slip house, add the auxiliary material comprising retention agent and reinforcing agent, reinforcing agent mainly adds surface layer slurry, the each layer of retention agent all needs to add, then sends into the outer back flow water pump of paper machine machine and enriched water mixed diluting through frequency control stock pump, delivers to pressurized screen screen by fan pump, then head box is entered, each layer approach flow concentration controls: surface layer: 0.3-0.4%, lining, bottom 0.4-0.5%, sandwich layer 0.6-0.8%; After approach flow, coating system is entered after four folded net shapings, squeezing, drying, top sizing, again drying, press polish, at the bottom of the lining core of face, each layer slurry dispense amount controls, the body paper so made is again after top sizing, surface layer precoating, middle painting and face are coated with, after hot air drier drying, enter debugging mode cylinder and soft calendaring ornamenting, horizontal reel machine batches and sent workshop section, surface size is made up through bioenzymatic conversion of cassava ative starch, allocate the PVA dextrin of 10-15% into, gelatin concentration control 12-18%, viscosity control 40-80cps, spread control 3-5g/m
2, wherein the coating levels of precoated shet, floating coat is calcium carbonate 70-90%, kaolin 10-30%, dispersant 0.1-0.3%, adhesive 8-12%, water repellent agent 0.3-0.7%, lubricant 0-0.5%, coating solids control 66-70%, upper painting amount controls at 15-20g/m
2; The coating levels of finishing coat is calcium carbonate 50-70%, kaolin 20-50%, plastic pigments 0-10%, dispersant 0.1-0.3%, adhesive 10-14%, water repellent agent 0.4-1.0%, lubricant 0.4-1.0%, the control of painting coating solid content is at 60-65%, and upper painting amount controls at 10-15g/m
2, the paper roll that reel machine gets off, part send roll web packaging production line after rewinding machine rewinding.
8. light basis weight high strength coated manila according to claim 7, it is characterized in that, after top sizing drying, the hard calender of crown control is adopted to control cardboard banner thickness, roughness uniformity at body paper, wherein hard calendering temperature 120-180 DEG C, linear pressure 30-50KN/M; After being coated with drying, the soft press-polishing machine of crown control is adopted to control sheet gloss degree, roughness uniformity at body paper, wherein soft calendaring temperature 100-150 DEG C, linear pressure 15-35KN/M.
9. light basis weight high strength Special coating white according to claim 7, is characterized in that, adopts wide nip formula shoe press technology in wet web press dewatering process, controls squeezing linear pressure 650-750KN/M.
10. light basis weight high strength coated manila according to claim 7, it is characterized in that, give up EOCC and domestic waste paper LOCC as sandwich layer waste paper pulp layer proportioning raw material using give up AOCC, Europe of U.S.A, proportioning is respectively AOCC and accounts for 40-50%, EOCC accounts for 40-50%, LOCC accounts for 0-20%, and after defibrination, beating degree controls at 35-40 ° of SR.
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| CN104988789A (en) * | 2015-05-29 | 2015-10-21 | 东莞玖龙纸业有限公司 | Method for making low basis weight manila board from wood fiber |
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| CN105484106A (en) * | 2016-01-14 | 2016-04-13 | 河北昌泰纸业有限公司 | High-strength, water-resistant and environment-friendly kraft paper and preparation method |
| CN106245427A (en) * | 2016-07-25 | 2016-12-21 | 兖州熙来精细化工有限公司 | A kind of coating starch and production technology and use the coating coating of this coating starch |
| CN106758491A (en) * | 2016-12-06 | 2017-05-31 | 浙江科技学院 | A kind of light basis weight protection against the tide coated manila and preparation method thereof |
| CN106436477A (en) * | 2016-12-06 | 2017-02-22 | 浙江科技学院 | Low basis weight damp-proof coated white board and preparation method thereof |
| CN107217542A (en) * | 2017-06-24 | 2017-09-29 | 镇江严彦气体有限公司 | A kind of preparation method of white-top kraft liner board |
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