CN102199898A - Coated natural kraft and manufacturing method thereof - Google Patents
Coated natural kraft and manufacturing method thereof Download PDFInfo
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- CN102199898A CN102199898A CN 201110091856 CN201110091856A CN102199898A CN 102199898 A CN102199898 A CN 102199898A CN 201110091856 CN201110091856 CN 201110091856 CN 201110091856 A CN201110091856 A CN 201110091856A CN 102199898 A CN102199898 A CN 102199898A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000002655 kraft paper Substances 0.000 title abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 104
- 239000011248 coating agent Substances 0.000 claims abstract description 99
- 239000010410 layer Substances 0.000 claims abstract description 94
- 239000002344 surface layer Substances 0.000 claims abstract description 29
- 238000007639 printing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 22
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 21
- 238000004513 sizing Methods 0.000 claims abstract description 17
- 239000010893 paper waste Substances 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 239000000123 paper Substances 0.000 claims description 121
- 239000005995 Aluminium silicate Substances 0.000 claims description 95
- 235000012211 aluminium silicate Nutrition 0.000 claims description 95
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 95
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 60
- 239000003292 glue Substances 0.000 claims description 58
- 238000007667 floating Methods 0.000 claims description 45
- 239000000049 pigment Substances 0.000 claims description 43
- 230000037452 priming Effects 0.000 claims description 43
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 18
- 229920002472 Starch Polymers 0.000 claims description 12
- 239000008107 starch Substances 0.000 claims description 12
- 235000019698 starch Nutrition 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000007591 painting process Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 6
- 239000004816 latex Substances 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 239000011111 cardboard Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 229920002261 Corn starch Polymers 0.000 claims description 3
- 240000003183 Manihot esculenta Species 0.000 claims description 3
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 3
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 239000008120 corn starch Substances 0.000 claims description 3
- 229940099112 cornstarch Drugs 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000007603 infrared drying Methods 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 239000002345 surface coating layer Substances 0.000 abstract 3
- 239000012792 core layer Substances 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 9
- 239000011087 paperboard Substances 0.000 description 6
- 240000000486 Lepidium draba Species 0.000 description 5
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- 239000010791 domestic waste Substances 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
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- 239000002761 deinking Substances 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to coated natural kraft and a manufacturing method thereof. The traditional coated kraft does not have the advantages of attractive appearance, environment friendliness, high strength and good printing performance. The coated natural kraft disclosed by the invention comprises natural kraft, a surface sizing layer and a surface coating layer and is characterized in that a bottom layer comprises OCC (Old Corrugated Case) waste paper pulp and a core layer comprises waste paper; a surface layer comprises natural wood pulp and waste paper pulp, wherein the weight percentage of the natural wood pulp is 30% to 90% and the balance is the waste paper pulp; the surface sizing layer comprises a front sizing layer and a back sizing layer; and the surface coating layer comprises a bottom coating layer, a middle coating layer and a surface coating layer. The manufacturing method for the coated natural kraft sequentially comprises a natural kraft preparing working procedure, a sizing working procedure, a coating working procedure and a molding working procedure. The coated natural kraft has the advantages of reasonable structure design, attractive appearance, environment friendliness, high strength, good printing performance, simple preparation technology, low production cost and good quality.
Description
Technical field
The present invention relates to a kind of true qualities coating craft paper and manufacture method thereof, belong to pulp technology for making paper.
Background technology
The quantitative height, the intensity that are coated with paperboard in the market are low, and it is quantitatively generally at 200g/m
2More than, coating weight is generally at 30-50 g/m
2Though this class coated paper coated face whiteness is higher, ink absorption and print gloss are all fine, have certain deflection and folding strength, but because the quantitative height and the coating weight of its product are big, compare with high-strength coating craft paper, under the quantitative situation of same product, its strength character just differs greatly, and can not reach high-intensity packing instructions.And the coating paperboard is compared with the coating craft paper, because the intensity of coating paperboard is low, the paper machine can't hang down grammes per square metre and high speed of a motor vehicle pulping requirements.
As light coated white craft paper, its product is quantitatively generally at 120-350g/m
2, coating is at 10-40 g/m
2Though, light coated white craft paper has contained the characteristics of coated paper and white-top kraft liner board, it is quantitatively low to have product, and intensity height, smoothness, glossiness and printing adaptability be characteristics preferably also, but, because it adopts the bleached wood pulp vermicelli, adopt pulp from decoloured waste paper as sandwich layer, so again simultaneously, will certainly cause wood pulp manufacturing and slurry to handle workshop section, cause the wasting of resources second environmental pollution.As open day was on November 25th, 2009, publication number is in the Chinese patent of CN101586317, a kind of coated white-top kraft liner board and manufacture method thereof are disclosed, this coated white-top kraft liner board comprises coating layer, surface layer, lining, bottom and glue application layer, coating layer comprises be set in sequence on the surface layer two coating layerings at least, coated white-top kraft liner board quantitatively be 120～220g/m
2, the coating weight of coating layer is 12～40g/m
2Three road coating layers compositions are respectively: the pigment of the first road primary coat coating layer is calcium carbonate, the pigment that is coated with coating layer in second road is made up of calcium carbonate and kaolin, the 3rd road face is coated with the pigment of coating layer and is made up of calcium carbonate, kaolin and plastic pigments, be coated with the quality that raw material used in the coating layer and consumption can not effectively improve coated white-top kraft liner board owing to be coated with coating layer and the 3rd road face in the first road primary coat coating layer, second road, be difficult to produce the intensity height, the craft paper that printing performance is good.
Though on the market some coating kraft liner board papers are arranged also now, also do not have exquisite appearance, environmental protection, intensity height, the coating craft paper that printing performance is good.As open day was on 04 01st, 2009, publication number is in the Chinese patent of CN101397765, a kind of coating kraft liner board paper is disclosed, this coating kraft liner board paper uses the true qualities kraft inner paper as bodystock paper, wherein, on the true qualities kraft inner paper, form and comprise the pigment coated of adhesive, pigment coatedly comprise that primary coat is pigment coated, in finish pigment coating and face is finished pigment coating, contain composite titanium dioxide during each is pigment coated as pigment component, because raw material during each is pigment coated and consumption are difficult to realize best compound mode, thereby be difficult to produce the intensity height, the coating craft paper that printing performance is good is difficult to effectively promote the quality that is coated with craft paper.
In sum, also there is not a kind of exquisite appearance at present, environmental protection, intensity height, the coating craft paper that printing performance is good.
Summary of the invention
The objective of the invention is to overcome above shortcomings in the prior art, and a kind of reasonable in design is provided, exquisite appearance, environmental protection, intensity height, true qualities coating craft paper and manufacture method thereof that printing performance is good.
The present invention addresses the above problem the technical scheme that is adopted: this true qualities coating craft paper is made up of true qualities craft paper, top sizing layer and surface coated layer, described true qualities craft paper is made up of bottom, sandwich layer and surface layer, the lower surface of described sandwich layer is fixed on the upper surface of bottom, the lower surface of described surface layer is fixed on the upper surface of sandwich layer, its characteristics are: described bottom is made up of the OCC secondary stock, and described sandwich layer is made up of waste paper; Described surface layer is made up of true qualities wood pulp and secondary stock, and true qualities wood pulp and secondary stock are all in over dry, and the percentage by weight of true qualities wood pulp is 30%-90%, and surplus is a secondary stock; Described top sizing layer is made up of positive glue application layer and back side glue application layer, include the starch after boiling in described positive glue application layer and the back side glue application layer, the lower surface of described positive glue application layer is fixed on the upper surface of surface layer, and the upper surface of described back side glue application layer is fixed on the lower surface of bottom; Described surface coated layer is made up of priming coat, floating coat and finishing coat, the lower surface of described priming coat is fixed on the upper surface of positive glue application layer, the lower surface of described floating coat is fixed on the upper surface of priming coat, the lower surface of described finishing coat is fixed on the upper surface of floating coat, described priming coat, floating coat and finishing coat are formed by pigment, adhesive and auxiliary agent, and described adhesive is formed by two kinds in acetic acid latex, styrene-butadiene latex and the coating starch or three kinds; Pigment in the described priming coat comprises calcium carbonate and kaolin, is 100 weight portions in calcium carbonate and kaolin sum, and the content of calcium carbonate is the 70-90 weight portion, and surplus is a kaolin; Pigment in the described floating coat comprises calcium carbonate, kaolin and titanium dioxide, is 100 weight portions in calcium carbonate, kaolin and titanium dioxide sum, and the content of calcium carbonate is the 50-70 weight portion, and kaolinic content is the 10-30 weight portion, and surplus is a titanium dioxide; Pigment in the described finishing coat comprises calcium carbonate, kaolin and plastic pigments, is 100 weight portions in calcium carbonate, kaolin and plastic pigments sum, and the content of calcium carbonate is the 80-90 weight portion, and kaolinic content is the 10-15 weight portion, and surplus is a plastic pigments; The quantitative of described true qualities coating craft paper is 130-280g/m
2, wherein, the grammes per square metre scope of described surface layer is at 25-35g/m
2, the grammes per square metre scope of described sandwich layer is at 25-45 g/m
2, the grammes per square metre scope of described bottom is at 45-155g/m
2, the resin added of described top sizing layer is 2-5g/m
2, the coating weight of described surface coated layer is 20-40g/m
2
Kaolin in the pigment in the priming coat of the present invention is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of described particulate is below 2 μ m, the described kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
Kaolin in the pigment in the floating coat of the present invention is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of described particulate is below 2 μ m, the described kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
Kaolin in the pigment in the finishing coat of the present invention is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of described particulate is below 2 μ m, the described kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
Starch in positive glue application layer of the present invention and the back side glue application layer is tapioca or cornstarch.
The method that the present invention makes true qualities coating craft paper comprises true qualities craft paper preparation section successively, the applying glue operation, painting process and molding procedure, the used equipment of this method comprises the finishing coat mixing pit, the floating coat mixing pit, the priming coat mixing pit, feeding system, paper machine slurry flowing box, surface size press and curtain formula coating machine, in the described true qualities craft paper preparation section, to make the raw material of finishing coat earlier, make the raw material of floating coat and the raw material of making priming coat and be added to the finishing coat mixing pit respectively, mix in floating coat mixing pit and the priming coat mixing pit, then will be through mixed finishing coat raw material by feeding system, floating coat raw material and priming coat raw material are transported in the paper machine slurry flowing box, dehydration is shaped through fourdrinier part, compound and manufacture paper with pulp and make base board, again base board is dewatered through press machines, preceding dry and oven dry, make mass dryness fraction and be 92% true qualities craft paper, this true qualities craft paper is from top to bottom successively by finishing coat, floating coat and priming coat are formed by stacking, it is characterized in that: in the described applying glue operation, earlier the true qualities craft paper is carried out applying glue through surface size press, upper surface at finishing coat is provided with the positive glue application layer of one deck, lower surface at priming coat is provided with one deck back side glue application layer, through dry and oven dry later, carry out hard press polish again and obtain the consistent thickness of banner then with the surfacing modification; Described painting process comprise successively the primary coat step, in be coated with step, face is coated with step and drying steps, in the described primary coat step, upper surface to positive glue application layer is coated priming coat, fill the pit portion on the positive glue application layer smooth, for floating coat provides a smooth surface of opening, to increase acceptance to floating coat; Be coated with in described in the step, coat floating coat to the upper surface of priming coat, form the uniform seal coat of thickness, cover this color surface layer fully by curtain formula coating machine; Described face is coated with in the step, coats finishing coat at the upper surface of floating coat, improves the printing adaptability of true qualities coating craft paper; In the described molding procedure, will enter soft calendaring and paper ornamenting again, and be shaped at last and batch and make true qualities coating craft paper through the cardboard after the coating through behind the infrared drying, hot bellows drying; The quantitative of described true qualities coating craft paper is 130-280g/m
2, wherein, the grammes per square metre scope of described surface layer is at 25-35g/m
2, the grammes per square metre scope of described sandwich layer is at 25-45 g/m
2, the grammes per square metre scope of described bottom is at 45-155g/m
2, the resin added of described top sizing layer is 2-5g/m
2, the coating weight of described surface coated layer is 20-40g/m
2
The present invention compared with prior art, have the following advantages and effect: true qualities coating craft paper is owing to adopt true qualities wood pulp and recovery OCC secondary stock to manufacture paper with pulp, the craft paper of being produced not only intensity height, printing effect is good, and because its grammes per square metre is low, the intensity height can satisfy the online coating production of the high speed of a motor vehicle of paper machine fully.Therefore, true qualities coating craft paper has the printing characteristic and the high advantage of craft paper ring crush intensity of coated board, simultaneously, the true qualities coating craft paper environmental protection of producing, exquisite appearance, the cardboard dimensionally stable, planarization is fine, can partly or completely substitute coated manila, be widely used in and make various medium and high-grade goods packing boxes.
In addition, surface layer of the present invention adopts the non-bleached wood pulp of true qualities, and the non-bleached wood pulp of true qualities is compared with bleached wood pulp, and pulping process pollutes few, and the raw material of sandwich layer and bottom is owing to all adopt the reclaimed waste paper slurry, no deinking technology.Therefore, not only production cost is low for true qualities coating craft paper, and is low in the pollution of the environment, and environmental protection, avoided the transition felling of forest, helps Sustainable utilization of resources, belongs to the high-grade paperboard of " environmental protection " type.
True qualities of the present invention coating craft paper not only paper whiteness height, smoothness is good, and printing performance is good, and can accomplish low quantitatively, high strength.The true qualities coating craft paper that adopts the present invention to produce is quantitatively low, intensity is good, can not only satisfy the paper machine and produce under 1000 meters/minute high speed of a motor vehicle situation, avoids disconnected paper, and for one applying glue, painting process provide guarantee down.Simultaneously,, thereby improved the carton usable floor area of Unit Weight greatly, reduced user's production cost because its intensity height is quantitatively low.The technology of preparation true qualities coating craft paper is simple among the present invention, and production cost is low, and the quality of making the true qualities coating craft paper that forms is good.
Description of drawings
Fig. 1 is the structural representation of true qualities coating craft paper in the embodiment of the invention.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and by embodiment, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment:
Referring to Fig. 1, true qualities coating craft paper in the present embodiment is made up of true qualities craft paper, top sizing layer and surface coated layer, wherein, the true qualities craft paper is made up of bottom 7, sandwich layer 6 and surface layer 5, the lower surface of sandwich layer 6 is fixed on the upper surface of bottom 7, and the lower surface of surface layer 5 is fixed on the upper surface of sandwich layer 6.Bottom 7 in the present embodiment is made up of the OCC secondary stock, and sandwich layer 6 is made up of waste paper.Surface layer 5 in the present embodiment is made up of true qualities wood pulp and secondary stock, true qualities wood pulp and secondary stock are all in over dry, the percentage by weight of true qualities wood pulp is 30%-90%, surplus is a secondary stock, that is to say in surface layer 5, the shared percentage by weight of the wood pulp of over dry is 30%-90%, and surplus is the secondary stock of over dry.
Top sizing layer in the present embodiment is made up of positive glue application layer 4 and back side glue application layer 8, includes the starch after boiling in positive glue application layer 4 and the back side glue application layer 8, and the starch in positive glue application layer 4 and the back side glue application layer 8 can be tapioca or cornstarch.The lower surface of positive glue application layer 4 is fixed on the upper surface of surface layer 5 in the present embodiment, and the upper surface of back side glue application layer 8 is fixed on the lower surface of bottom 7.
Surface coated layer in the present embodiment is made up of priming coat 3, floating coat 2 and finishing coat 1, the lower surface of priming coat 3 is fixed on the upper surface of positive glue application layer 4, the lower surface of floating coat 2 is fixed on the upper surface of priming coat 3, and the lower surface of finishing coat 1 is fixed on the upper surface of floating coat 2.Priming coat 3, floating coat 2 and finishing coat 1 are formed by pigment, adhesive and auxiliary agent, and wherein, adhesive is formed by two kinds in acetic acid latex, styrene-butadiene latex and the coating starch or three kinds.
Pigment in the present embodiment priming coat 3 comprises calcium carbonate and kaolin, is 100 weight portions in calcium carbonate and kaolin sum, and the content of calcium carbonate is the 70-90 weight portion, and surplus is a kaolin.Kaolin in the pigment in the priming coat 3 is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of particulate is below 2 μ m, the kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
Pigment in the present embodiment floating coat 2 comprises calcium carbonate, kaolin and titanium dioxide, is 100 weight portions in calcium carbonate, kaolin and titanium dioxide sum, and the content of calcium carbonate is the 50-70 weight portion, and kaolinic content is the 10-30 weight portion, and surplus is a titanium dioxide.Kaolin in the pigment in the floating coat 2 is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of particulate is below 2 μ m, the kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
Pigment in the present embodiment finishing coat 1 comprises calcium carbonate, kaolin and plastic pigments, in calcium carbonate, kaolin and plastic pigments sum is 100 weight portions, the content of calcium carbonate is the 80-90 weight portion, and kaolinic content is the 10-15 weight portion, and surplus is a plastic pigments.Kaolin in the pigment in the finishing coat 1 is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of particulate is below 2 μ m, the kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
True qualities coating craft paper is 130-280g/m quantitatively in the present embodiment
2, wherein, the grammes per square metre scope of surface layer 5 is at 25-35g/m
2, the grammes per square metre scope of sandwich layer 6 is at 25-45 g/m
2, the grammes per square metre scope of bottom 7 is at 45-155g/m
2, the resin added of top sizing layer is 2-5g/m
2, the coating weight of surface coated layer is 20-40g/m
2
The method of making true qualities coating craft paper in the present embodiment comprises true qualities craft paper preparation section, applying glue operation, painting process and molding procedure successively, the used equipment of this method comprises finishing coat 1 mixing pit, floating coat 2 mixing pits, priming coat 3 mixing pits, feeding system, paper machine slurry flowing box, surface size press and curtain formula coating machine, these equipment are prior art to one skilled in the art, no longer describe in detail herein.
In the true qualities craft paper preparation section, to make the raw material of finishing coat 1 earlier, make the raw material of floating coat 2 and the raw material of making priming coat 3 and be added to finishing coat 1 mixing pit respectively, mix in floating coat 2 mixing pits and priming coat 3 mixing pits, then will be through mixed finishing coat 1 raw material by feeding system, floating coat 2 raw materials and priming coat 3 raw materials are transported in the paper machine slurry flowing box, dehydration is shaped through fourdrinier part, compound and manufacture paper with pulp and make base board, again base board is dewatered through press machines, preceding dry and oven dry, make mass dryness fraction and be 92% true qualities craft paper, this true qualities craft paper is from top to bottom successively by finishing coat 1, floating coat 2 and priming coat 3 are formed by stacking.
In the applying glue operation of present embodiment, earlier the true qualities craft paper is carried out applying glue through surface size press, upper surface at finishing coat 1 is provided with the positive glue application layer 4 of one deck, lower surface at priming coat 3 is provided with one deck back side glue application layer 8, through dry and oven dry later, carry out hard press polish again and obtain the consistent thickness of banner then with the surfacing modification.
Painting process in the present embodiment comprise successively the primary coat step, in be coated with step, face is coated with step and drying steps, in the primary coat step, coat priming coat 3 to the upper surface of positive glue application layer 4, fill the pit portion on the positive glue application layer 4 smooth, for floating coat 2 provides a smooth surface of opening, to increase acceptance to floating coat 2; In be coated with in the step, coat floating coat 2 by curtain formula coating machine to the upper surface of priming coat 3, form the uniform seal coat of thickness, cover this color surface layer 5 fully; Be coated with in the step at face, coat finishing coat 1, improve the printing adaptability of true qualities coating craft paper at the upper surface of floating coat 2.
In the molding procedure of present embodiment, will enter soft calendaring and paper ornamenting again, and be shaped at last and batch and make true qualities coating craft paper through the cardboard after the coating through behind the infrared drying, hot bellows drying.
True qualities coating craft paper among the present invention adopts three roads combination coating method, the cardboard that the above-mentioned explained hereafter of process goes out, not only exquisite appearance, environmental protection, and intensity height, printing performance is good, satisfying the requirement of all kinds of high-grade packages printings, is the substitute products of the coating paperboard of a new generation.
Waste paper in the sandwich layer 6 of the present invention can be made up of imported waste paper and domestic waste paper, and imported waste paper and domestic waste paper are in 100% over dry, and the shared percentage by weight of imported waste paper is 40%-60%, and surplus is a domestic waste paper.OCC secondary stock in the bottom 7 of the present invention can be made up of import OCC secondary stock and domestic OCC secondary stock, import OCC secondary stock and domestic OCC secondary stock are in 100% over dry, the shared percentage by weight of import OCC secondary stock is 40%-60%, and surplus is domestic OCC secondary stock.
At first the size-press starch sizing material is coated among the present invention on the surface of surface layer 5 and bottom 7, then in order, three roads combinations coating composition is coated on uniformly forms on the glue application layer.Wherein, glue application layer mainly is made up of starch and auxiliary agent, and coating is made up of pigment, adhesive and auxiliary agent with coating.The applying glue of this coating craft paper, coating squence are: carry out applying glue earlier, form glue application layer, on glue application layer, carry out then primary coat, in be coated with and face is coated with three roads combinations coating layer, primary coat is arranged on the face glue application layer, in be coated with and be arranged on the primary coat layer of cloth, be coated with on the coating layer during face is coated with and is arranged on, it is the most surperficial to be positioned at paper.
The present invention is directed to each layer of true qualities coatings craft paper paper situation characteristics, the starch fluid after utilizing surface size press with modification earlier evenly is coated onto on surface layer 5 and bottom 7 surfaces, to increase physical strength, water repelling property and the printing quality of true qualities craft paper; Enter the primary coat in the three roads combinations coating method again, by priming coat 3, with " pit " on body paper surface partly " fillings " smooth, in be coated with a more smooth surface of opening be provided, with the acceptance of increase, make surface layer 5 papers smooth smooth to coating; Be coated with in being undertaken by curtain formula coating machine then, form the uniform seal coat of thickness, cover this color surface layer 5 fully; Be coated with through face at last, improve the printing adaptability of true qualities coating craft paper.The present invention takes above coating process, and not only coating is even, and spreadability is good, and, the true qualities coating craft paper glossiness height of producing, printing adaptability is very good.
True qualities of the present invention coating craft paper not only paper whiteness height, smoothness is good, and printing performance is good, and can accomplish low quantitatively, high strength.The true qualities coating craft paper that adopts the present invention to produce is quantitatively low, intensity is good, can not only satisfy the paper machine and produce under 1000 meters/minute high speed of a motor vehicle situation, avoids disconnected paper, and for one applying glue, painting process provide guarantee down.Simultaneously,, thereby improved the carton usable floor area of Unit Weight greatly, reduced user's production cost because its intensity height is quantitatively low.
Because true qualities coating craft paper of the present invention is quantitatively low, the paper machine speed height of manufacturing paper with pulp, online coating speed is very fast, the online coating of per minute is about 1000 meters, therefore, for guaranteeing that craft paper can not guarantee good coating effect again simultaneously because of quantitatively low, weak strength produce disconnected paper aborning under high speed of a motor vehicle situation, the curtain formula coating machine that adopts has following characteristics: coating is even, coating speed is fast, can satisfy steady production under the low high speed of a motor vehicle condition of grammes per square metre; Coating layer thickness is very even, the coating quality excellence, and spreadability is good, and the while is easy operating also; Running cost is low, the production efficiency height, and it is few to be coated with paper defects simultaneously.Adopt the mode of curtain formula coating in the present invention, add and use high-speed coating coating, not only coating is even, covering is good for the true qualities of being produced coating craft paper, and glossiness height, printing adaptability are strong, can satisfy the requirements of all kinds of high-grade printings.
For further specifying the present invention, further the present invention will be described with the form of form below, specific as follows.
By above preparation technology, the technical indicator of the true qualities coating craft paper of producing sees Table 5.
As from the foregoing, the true qualities coating craft paper among the present invention is not only quantitatively low, intensity is high, and printing effect is good; Simultaneously, owing to combine curtain formula coating process, coating is thin, coating speed is fast, and covering is good, can satisfy steady production under the low high speed of a motor vehicle condition of grammes per square metre.Therefore, true qualities coating craft paper has been taken into account the advantage of coated board and craft paper, simultaneously, because it adopts the recovery slurry substantially, not only production cost is low, low in the pollution of the environment, and environmental protection, avoided the transition felling of forest, help Sustainable utilization of resources, belong to the high-grade paperboard of " environmental protection " type, have good market development prospect.
Though the present invention with embodiment openly as above; but it is not in order to limit protection scope of the present invention; any technical staff who is familiar with this technology, change and the retouching done in not breaking away from design of the present invention and scope all should belong to protection scope of the present invention.
Claims (6)
1. true qualities are coated with craft paper, it is made up of true qualities craft paper, top sizing layer and surface coated layer, described true qualities craft paper is made up of bottom, sandwich layer and surface layer, the lower surface of described sandwich layer is fixed on the upper surface of bottom, the lower surface of described surface layer is fixed on the upper surface of sandwich layer, it is characterized in that: described bottom is made up of the OCC secondary stock, and described sandwich layer is made up of waste paper; Described surface layer is made up of true qualities wood pulp and secondary stock, and true qualities wood pulp and secondary stock are all in over dry, and the percentage by weight of true qualities wood pulp is 30%-90%, and surplus is a secondary stock; Described top sizing layer is made up of positive glue application layer and back side glue application layer, include the starch after boiling in described positive glue application layer and the back side glue application layer, the lower surface of described positive glue application layer is fixed on the upper surface of surface layer, and the upper surface of described back side glue application layer is fixed on the lower surface of bottom; Described surface coated layer is made up of priming coat, floating coat and finishing coat, the lower surface of described priming coat is fixed on the upper surface of positive glue application layer, the lower surface of described floating coat is fixed on the upper surface of priming coat, the lower surface of described finishing coat is fixed on the upper surface of floating coat, described priming coat, floating coat and finishing coat are formed by pigment, adhesive and auxiliary agent, and described adhesive is formed by two kinds in acetic acid latex, styrene-butadiene latex and the coating starch or three kinds; Pigment in the described priming coat comprises calcium carbonate and kaolin, is 100 weight portions in calcium carbonate and kaolin sum, and the content of calcium carbonate is the 70-90 weight portion, and surplus is a kaolin; Pigment in the described floating coat comprises calcium carbonate, kaolin and titanium dioxide, is 100 weight portions in calcium carbonate, kaolin and titanium dioxide sum, and the content of calcium carbonate is the 50-70 weight portion, and kaolinic content is the 10-30 weight portion, and surplus is a titanium dioxide; Pigment in the described finishing coat comprises calcium carbonate, kaolin and plastic pigments, is 100 weight portions in calcium carbonate, kaolin and plastic pigments sum, and the content of calcium carbonate is the 80-90 weight portion, and kaolinic content is the 10-15 weight portion, and surplus is a plastic pigments; The quantitative of described true qualities coating craft paper is 130-280g/m
2, wherein, the grammes per square metre scope of described surface layer is at 25-35g/m
2, the grammes per square metre scope of described sandwich layer is at 25-45 g/m
2, the grammes per square metre scope of described bottom is at 45-155g/m
2, the resin added of described top sizing layer is 2-5g/m
2, the coating weight of described surface coated layer is 20-40g/m
2
2. true qualities coating craft paper according to claim 1, it is characterized in that: the kaolin in the pigment in the described priming coat is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of described particulate is below 2 μ m, the described kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
3. true qualities coating craft paper according to claim 1, it is characterized in that: the kaolin in the pigment in the described floating coat is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of described particulate is below 2 μ m, the described kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
4. true qualities coating craft paper according to claim 1, it is characterized in that: the kaolin in the pigment in the described finishing coat is made up of the particulate kaolin and the kaolin of delaminating, the kaolinic average grain diameter of described particulate is below 2 μ m, the described kaolin of delaminating is to be obtained after the particulate kaolin below the 2 μ m is handled through delaminating by average grain diameter, in the particulate kaolin and the kaolin sum of delaminating is 100 weight portions, the kaolinic content of particulate is the 30-60 weight portion, and surplus is the kaolin of delaminating.
5. true qualities coating craft paper according to claim 1, it is characterized in that: the starch in described positive glue application layer and the back side glue application layer is tapioca or cornstarch.
6. the method for the described true qualities coating of manufacturing such as the arbitrary claim of claim 1-5 craft paper, this method comprises true qualities craft paper preparation section successively, the applying glue operation, painting process and molding procedure, the used equipment of this method comprises the finishing coat mixing pit, the floating coat mixing pit, the priming coat mixing pit, feeding system, paper machine slurry flowing box, surface size press and curtain formula coating machine, in the described true qualities craft paper preparation section, to make the raw material of finishing coat earlier, make the raw material of floating coat and the raw material of making priming coat and be added to the finishing coat mixing pit respectively, mix in floating coat mixing pit and the priming coat mixing pit, then will be through mixed finishing coat raw material by feeding system, floating coat raw material and priming coat raw material are transported in the paper machine slurry flowing box, dehydration is shaped through fourdrinier part, compound and manufacture paper with pulp and make base board, again base board is dewatered through press machines, preceding dry and oven dry, make mass dryness fraction and be 92% true qualities craft paper, this true qualities craft paper is from top to bottom successively by finishing coat, floating coat and priming coat are formed by stacking, it is characterized in that: in the described applying glue operation, earlier the true qualities craft paper is carried out applying glue through surface size press, upper surface at finishing coat is provided with the positive glue application layer of one deck, lower surface at priming coat is provided with one deck back side glue application layer, through dry and oven dry later, carry out hard press polish again and obtain the consistent thickness of banner then with the surfacing modification; Described painting process comprise successively the primary coat step, in be coated with step, face is coated with step and drying steps, in the described primary coat step, upper surface to positive glue application layer is coated priming coat, fill the pit portion on the positive glue application layer smooth, for floating coat provides a smooth surface of opening, to increase acceptance to floating coat; Be coated with in described in the step, coat floating coat to the upper surface of priming coat, form the uniform seal coat of thickness, cover this color surface layer fully by curtain formula coating machine; Described face is coated with in the step, coats finishing coat at the upper surface of floating coat, improves the printing adaptability of true qualities coating craft paper; In the described molding procedure, will enter soft calendaring and paper ornamenting again, and be shaped at last and batch and make true qualities coating craft paper through the cardboard after the coating through behind the infrared drying, hot bellows drying; The quantitative of described true qualities coating craft paper is 130-280g/m
2, wherein, the grammes per square metre scope of described surface layer is at 25-35g/m
2, the grammes per square metre scope of described sandwich layer is at 25-45 g/m
2, the grammes per square metre scope of described bottom is at 45-155g/m
2, the resin added of described top sizing layer is 2-5g/m
2, the coating weight of described surface coated layer is 20-40g/m
2
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