CN115748306B - Glossy watermark anti-counterfeiting paperboard and production method thereof - Google Patents
Glossy watermark anti-counterfeiting paperboard and production method thereof Download PDFInfo
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- CN115748306B CN115748306B CN202211316595.2A CN202211316595A CN115748306B CN 115748306 B CN115748306 B CN 115748306B CN 202211316595 A CN202211316595 A CN 202211316595A CN 115748306 B CN115748306 B CN 115748306B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000011087 paperboard Substances 0.000 title claims abstract description 21
- 239000000123 paper Substances 0.000 claims abstract description 258
- 239000010410 layer Substances 0.000 claims description 150
- 238000010009 beating Methods 0.000 claims description 43
- 238000004513 sizing Methods 0.000 claims description 42
- 239000000835 fiber Substances 0.000 claims description 39
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 30
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 30
- 239000011121 hardwood Substances 0.000 claims description 26
- 239000001254 oxidized starch Substances 0.000 claims description 25
- 235000013808 oxidized starch Nutrition 0.000 claims description 25
- 239000011122 softwood Substances 0.000 claims description 25
- 239000002344 surface layer Substances 0.000 claims description 25
- -1 Alkyl Ketene Dimer Chemical compound 0.000 claims description 22
- 238000003490 calendering Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 22
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 229920000573 polyethylene Polymers 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 229920001131 Pulp (paper) Polymers 0.000 claims description 14
- 238000004537 pulping Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 4
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 3
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 3
- 230000008719 thickening Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 20
- 239000002002 slurry Substances 0.000 description 15
- 238000002156 mixing Methods 0.000 description 13
- 229920002472 Starch Polymers 0.000 description 10
- 239000008107 starch Substances 0.000 description 10
- 235000019698 starch Nutrition 0.000 description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 9
- 125000002091 cationic group Chemical group 0.000 description 8
- 239000002932 luster Substances 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 8
- 229920002401 polyacrylamide Polymers 0.000 description 8
- 239000010902 straw Substances 0.000 description 8
- 241000609240 Ambelania acida Species 0.000 description 7
- 239000010905 bagasse Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 239000003292 glue Substances 0.000 description 6
- 241000723353 Chrysanthemum Species 0.000 description 5
- 235000007516 Chrysanthemum Nutrition 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000010893 paper waste Substances 0.000 description 5
- 241001349804 Juncus alpinoarticulatus Species 0.000 description 4
- 240000007594 Oryza sativa Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 4
- 241000209140 Triticum Species 0.000 description 4
- 235000021307 Triticum Nutrition 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 239000011111 cardboard Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004043 dyeing Methods 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 235000014101 wine Nutrition 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010866 blackwater Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 150000002596 lactones Chemical group 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The invention relates to the technical field of anti-counterfeiting paper, in particular to a gloss watermark anti-counterfeiting paperboard and a production method thereof, and is characterized in that the gloss watermark anti-counterfeiting paperboard comprises surface paper, middle paper and bottom paper, wherein the surface paper is an anti-counterfeiting paper layer with black watermark graphics, the middle paper is a thickening layer, and the bottom paper is a paper fine layer.
Description
Technical Field
The invention relates to the technical field of anti-counterfeiting paper, in particular to a glossy watermark anti-counterfeiting paperboard and a production method thereof.
Background
As is well known, along with the continuous development of social economy, anti-counterfeiting becomes a main means for preventing lawless persons from making counterfeiting, paper anti-counterfeiting is taken as an important form of anti-counterfeiting, and various types of paper anti-counterfeiting forms are adopted by people, such as anti-counterfeiting of currency, anti-counterfeiting of birth certificates, wedding certificates, army certificates, house property certificates, graduation certificates, trademark registration certificates and the like, anti-counterfeiting of checks and bankbook of a financial banking system, anti-counterfeiting of performance tickets and gold-substituting tickets, anti-counterfeiting of various high-grade packages and labels of swabs, wine boxes, clothing labels and the like.
At present, watermark anti-counterfeiting is widely adopted as an anti-counterfeiting form with the last hundred years, and the watermark anti-counterfeiting method has the characteristic of easy mass identification and achieves effective anti-counterfeiting effect. However, the watermark identification needs to be in a light-transmitting condition, the black watermark or white watermark carried in the paper can be seen, and when the watermark anti-counterfeiting paper is placed on a tabletop or a thick cardboard is compounded on the back, the watermark is not easy to identify under an opaque condition, so that the application of the watermark anti-counterfeiting paper attached to the gray cardboard on anti-counterfeiting packaging is seriously affected.
Disclosure of Invention
The invention aims to solve the defects of the prior art, improves the visual anti-counterfeiting characteristic of anti-counterfeiting paper on the basis of the watermark anti-counterfeiting technology, has luster on the watermark image-text part of the paper, is obviously higher than the luster of other parts, can easily find the watermark image-text with luster on the surface of the paper no matter in light transmission or light non-transmission, ensures that the anti-counterfeiting characteristic is easier to identify, has simple production and obvious anti-counterfeiting characteristic, is easy to identify, can apply the watermark to package anti-counterfeiting of cardboard, and expands the application range of the anti-counterfeiting paper.
The technical scheme adopted for solving the technical problems is as follows:
a gloss watermark anti-counterfeiting paperboard is characterized by comprising surface layer paper, middle layer paper and bottom layer paper, wherein the surface layer paper is an anti-counterfeiting paper layer with black watermark graphics, and the surface layer paper, the middle layer paper and the bottom layer paper are combined into a piece of 250g/m 2 -420g/m 2 Glossy watermark anti-fake card paper.
The thickness of the slurry layer of the black watermark image-text part in the surface layer paper is thicker than that of the slurry layer of the non-image-text part, and the thickness difference is 1.0-2.0mm.
The production method is characterized in that three layers of net paper machines are adopted for production, the first layer of net and the second layer of net of the three layers of net paper machines form paper sheets which are plane paper, the third layer of net form paper sheets which are anti-counterfeiting paper with black watermark graphics context, the three layers of net are overlapped together, the first layer of net and the second layer of net form paper sheets which are bottom layer paper and middle layer paper of paper, the third layer of net form paper sheets which are anti-counterfeiting paper with black watermark graphics context, the thick slurry layer of the black watermark graphics context part in the surface layer paper is thicker than the thick slurry layer of the non-graphics context part to form black watermark, and after the three layers of net paper sheets of the surface layer paper, the middle layer paper and the bottom layer paper are combined into one paper sheet, the paper sheets are pressed, glued and dried before, surface glued, dried, calendered and coiled to form the anti-counterfeiting paper sheet with watermark graphics context, and the gloss watermark graphics context part is obviously higher than the gloss watermark graphics context part of the non-watermark graphics context part.
The surface sizing adopts polyvinyl alcohol, oxidized starch, polyethylene wax and Alkyl Ketene Dimer (AKD), the polyvinyl alcohol and the oxidized starch endow paper surface sizing and film forming performance, the polyethylene wax and the AKD endow paper surface paper with a wax layer, and after the paper with the wax layer is pressed, high gloss is generated at the high point of the black watermark image-text on the paper surface.
The ratio of the polyvinyl alcohol to the oxidized starch is 10:0-0:10, the ratio of the polyvinyl wax to the total absolute dry weight of the polyvinyl alcohol and the oxidized starch is 5-20%, and the ratio of the AKD to the total absolute dry weight of the polyvinyl alcohol and the oxidized starch is 10-30%.
The first layer of the three-layer net paper machine is a fourdrinier net or a cylinder mould, the second layer of the three-layer net paper machine is a fourdrinier net or a cylinder mould, and the third layer of the three-layer net paper machine is a cylinder mould.
The cylinder mould structure of the third layer of the invention is a watermark net welded with a concave on the outer wall of the cylinder mould, and the depth of the watermark net is 1.5-2.2mm.
The bottom paper pulp adopts two or more of softwood pulp fibers, hardwood pulp fibers, grass pulp fibers (such as wheat straw pulp, bagasse pulp, reed pulp, rice straw pulp, chinese alpine rush pulp and the like), bamboo pulp fibers and cotton pulp fibers. Mixing and beating, and beating with beating degree of 35-45 O SR, making the bottom paper with fine surface.
The middle layer pulp material ratio of the invention is two or more of softwood pulp fiber, hardwood pulp fiber, mill pulp fiber, grass pulp fiber (such as wheat straw pulp, bagasse pulp, reed pulp, rice straw pulp, chinese alpine rush pulp and the like) and bamboo pulp fiber. Mixing and beating treatment, wherein the beating degree of the slurry is 28 < -45 O SR. The middle layer slurry can adopt the original slurry color, and the middle layer paper can also be subjected to slight dyeing treatment to form a colored paper layer with color difference with the surface layer paper and the bottom layer paper tape. The contrast of the color of the watermark surface and the color of the paper surface at the non-watermark position is increased.
The paper pulp material of the surface layer with the graph and text graph layer adopts two or three of softwood pulp fiber, hardwood pulp fiber and cotton pulp fiber. Mixing, beating, and beating with beating degree of 42-55 O SR. The pulp after pulping treatment in the papermaking process can completely fill the concave graphic on the net and can be completely transferred from the concave part, so that the thickness of the pulp layer of the graphic part is larger than that of the pulp layer of the rest part.
The drying steps of the invention are as follows: and (3) carrying out non-contact drying on the sizing liquid on the surface of the paper by a hot air oven after the surface sizing process, and then drying the paper in a dryer.
The calendaring method comprises the following specific steps: after the surface sizing and drying process, the paper with polyethylene wax and AKD on the surface is calendered under the linear pressure of 80-120KN/m by a calender roll, the thickness of the thick liquid of the part with the black watermark pattern is thicker than that of the part without the pattern, the gloss of the part with the bigger pressure, namely the pattern part, is obviously increased, the glossiness of the pattern part is 16-25% (75 degrees), and the glossiness of the part without the pattern is 8-12% (75 degrees), thus forming the gloss watermark anti-counterfeiting paperboard.
The beneficial effects of the invention are as follows:
1. the glossy watermark anti-counterfeiting paperboard can obviously see the watermark anti-counterfeiting pattern with high gloss when the paper is horizontally placed, can also see the watermark anti-counterfeiting pattern under the condition that the paper is transparent, has the function of being identified in a head-on manner compared with the common watermark anti-counterfeiting paper, solves the problems of poor watermark definition and difficult identification of the high-quantitative watermark anti-counterfeiting paper, greatly improves the production ration of the watermark anti-counterfeiting paper, can produce 420g/m2 watermark anti-counterfeiting paperboard at the highest, expands the application range of the watermark anti-counterfeiting paper, can be directly applied to anti-counterfeiting packages of products such as wines, tea, clothing, cosmetics and the like, and solves the problem that the watermark definition is affected by the non-transparent watermark anti-counterfeiting paper due to the laminating paperboard when the watermark anti-counterfeiting paper is packaged in a high-grade.
2. The surface sizing is carried out, the sizing liquid on the surface of the paper is dried through a hot air oven, then the paper enters a dryer for drying, a lactone ring in an alkyl ketene dimer on the surface of the paper is opened, a hydrophobic waxy group-R is arranged on the surface of the paper, a wax layer is formed on the surface of the paper together with the polyethylene wax liquid, after the paper is calendered by a calender, the pressure on a black water-printed image-text part of the thick liquid layer is greater than that on other non-image-text parts, under the action of the pressure, the image-text part and the paper surface of the other non-image-text parts have obvious gloss difference, the image-text part with high gloss can be seen when the paper is in a plane view, besides the see-through black water marks, the surface gloss anti-counterfeiting characteristic is increased, the anti-counterfeiting characteristic is more obvious, the paper can be seen even under the condition of light-tightness, and the paper is easier to identify.
3. The formed glossy watermark anti-counterfeiting paperboard is directly molded in one step through a papermaking process, and does not need redundant processes such as spraying, metal wire embedding and the like, so that the process steps are simple, and most importantly, in the papermaking process, the anti-counterfeiting paper layer with the black watermark image text is surface paper, the anti-counterfeiting mark is on the surface paper, the pressed anti-counterfeiting mark is more obvious, and the anti-counterfeiting mark can be seen in a light-proof mode.
Drawings
FIG. 1 is a flow chart structure of a production process of the three-wire paper machine adopting a combination of a fourdrinier wire, a fourdrinier wire and a cylinder.
Fig. 2 is a flow chart structure of a production process of the three-layer net paper machine adopting a combination of a fourdrinier net, a cylinder net and a cylinder net.
Fig. 3 is a flow chart structure of a production process of the three-layer cylinder paper machine adopting a cylinder mould, cylinder mould and cylinder mould combination.
Fig. 4 is a schematic diagram of a glossy watermark anti-counterfeit card paper with chrysanthemum patterns in example 1 and example 4.
Fig. 5 is a schematic diagram of a glossy watermark anti-counterfeit card paper with a plum blossom pattern in embodiment 2.
Fig. 6 is a schematic diagram of a glossy watermark anti-counterfeit card paper with five-pointed star patterns in example 3 and example 5.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the figure, the glossy watermark anti-counterfeiting paperboard is characterized by comprising surface paper, middle paper and bottom paper, wherein the surface paper is an anti-counterfeiting paper layer with black watermark graphics, and the surface paper, the middle paper and the bottom paper are combined into a piece of 250g/m 2 -420g/m 2 Glossy watermark anti-fake card paper.
Further, the thickness of the slurry layer of the black watermark image-text part in the surface layer paper is 1.0-2.0mm thicker than that of the slurry layer of the non-image-text part, and the thickness of the slurry layer refers to the thickness of the black watermark image-text part in the pressed paperboard.
The production method is characterized in that three layers of net paper machines are adopted for production, the first layer of net and the second layer of net of the three layers of net paper machines form paper sheets which are plane paper, the third layer of net form paper sheets which are anti-counterfeiting paper with black watermark graphics context, the three layers of net are overlapped together, the first layer of net and the second layer of net form paper sheets which are bottom layer paper and middle layer paper of paper, the third layer of net form paper sheets which are anti-counterfeiting paper with black watermark graphics context, the thick slurry layer of the black watermark graphics context part in the surface layer paper is thicker than the thick slurry layer of the non-graphics context part to form black watermark, and after the three layers of net paper sheets of the surface layer paper, the middle layer paper and the bottom layer paper are combined into one paper sheet, the paper sheets are pressed, glued and dried before, surface glued, dried, calendered and coiled to form the anti-counterfeiting paper sheet with watermark graphics context, and the gloss watermark graphics context part is obviously higher than the gloss watermark graphics context part of the non-watermark graphics context part.
Further, the surface sizing adopts polyvinyl alcohol, oxidized starch, polyethylene wax and Alkyl Ketene Dimer (AKD), the polyvinyl alcohol and the oxidized starch endow paper surface sizing and film forming performance, the polyethylene wax and the AKD endow paper surface paper with a wax layer, and after the paper with the wax layer is pressed, high gloss is generated at the high point of the black watermark image-text on the paper surface.
Further, the ratio of the polyvinyl alcohol to the oxidized starch is 10:0-0:10, the ratio of the polyvinyl wax to the total absolute dry weight of the polyvinyl alcohol and the oxidized starch is 5-20%, and the ratio of the AKD to the total absolute dry weight of the polyvinyl alcohol and the oxidized starch is 10-30%.
Further, the first layer of the three-layer net paper machine is a fourdrinier net or a cylinder mould, the second layer of the three-layer net is a fourdrinier net or a cylinder mould, and the third layer of the three-layer net is a cylinder mould.
Further, the cylinder mould structure of the third layer of the net is a watermark net welded with a concave on the outer wall of the cylinder mould, and the depth of the watermark net is 1.5-2.2mm.
Further, the bottom paper pulp adopts two or more of softwood pulp fiber, hardwood pulp fiber, grass pulp fiber (such as wheat straw pulp, bagasse pulp, reed pulp, rice straw pulp, chinese alpine rush pulp and the like), bamboo pulp fiber and cotton pulp fiber. Mixing and beating, and beating with beating degree of 35-45 O SR, making the bottom paper with fine surface.
Further, the middle layer pulp is prepared from two or more of softwood pulp fiber, hardwood pulp fiber, mill pulp fiber, grass pulp fiber (such as wheat straw pulp, bagasse pulp, reed pulp, rice straw pulp, chinese alpine rush pulp, etc.), and bamboo pulp fiber. Mixing and beating, and beating the pulp with beating degree of 28-45 O SR. The middle layer slurry can adopt the original slurry color, and the middle layer paper can also be subjected to slight dyeing treatment to form a colored paper layer with color difference with the surface layer paper and the bottom layer paper tape. The contrast of the color of the watermark surface and the color of the paper surface at the non-watermark position is increased.
Further, the paper pulp material of the surface layer with the graph and text graph layer adopts two or three of softwood pulp fiber, hardwood pulp fiber and cotton pulp fiber. Mixing, beating, and beating with beating degree of 42-55 O SR. The pulp after pulping treatment in the papermaking process can completely fill the concave graphic on the net and can be completely transferred from the concave part, so that the thickness of the pulp layer of the graphic part is larger than that of the pulp layer of the rest part.
Further, the drying step is as follows: the surface sizing process is followed by a hot air oven, the sizing liquid on the surface of the paper is subjected to non-contact drying, the glue layer on the surface sizing surface is not damaged by the non-contact drying, and then the paper enters a drying cylinder for drying, and the length of an air channel of the hot air oven is 4 meters.
Further, the calendaring specifically comprises the following steps: after the surface sizing and drying process, the paper with polyethylene wax and AKD on the surface is calendered under the linear pressure of 80-120KN/m by a calender roll, the thickness of the thick liquid of the part with the black watermark pattern is thicker than that of the part without the pattern, the gloss of the part with the bigger pressure, namely the pattern part, is obviously increased, the glossiness of the pattern part is 16-25% (75 degrees), and the glossiness of the part without the pattern is 8-12% (75 degrees), thus forming the gloss watermark anti-counterfeiting paperboard.
Production example:
example 1:250g/m 2 The chrysanthemum pattern glossy watermark anti-counterfeiting paper is produced by a three-layer screen paper machine with 1760mm long screen and two cylinder screens.
1. Proportioning and pulping: the bottom paper and middle paper pulp are mixed with softwood pulp in 20 wt%, hardwood pulp in 80 wt% and beating in 35-38 O SR. The pulp of the watermark layer is prepared from 35% of softwood pulp, 65% of hardwood pulp, and mixed beating with beating degree of 42-46 O SR。
2. The auxiliary materials are used: 1.5% of cationic starch dry strength agent, 15% of talcum powder, 140ppm of polyacrylamide retention aid and 1.8% of PAE wet strength agent. The dosage of the auxiliary materials is the proportion of the total absolute dry pulp.
3. Surface sizing: 100% of polyvinyl alcohol, 5% of polyethylene wax (relative to the amount of absolute dry polyvinyl alcohol) and 30% of AKD (relative to the amount of absolute dry polyvinyl alcohol) are adopted, the concentration of the surface glue is 6.0%, and the viscosity is 35mPa.s. Surface Shi Jiaoshang gel content 1.5g/m 2 。
4. The basis weight of the bottom paper sheet is 80 g/m 2 The basis weight of the middle layer paper sheet is 80 g/m 2 Surface layer black watermark paper quantitative 90g/m 2 Total basis weight 250g/m 2 。
5. The surface layer black watermark layer watermark pattern processing mode is a welded watermark pattern, the watermark pattern depth is 1.5mm, and the watermark pattern is a chrysanthemum pattern (figure 4):
6. calendering: and (3) carrying out calendaring treatment on the surface of the dried paper by using a six-roller calendar, wherein the pressure of the calendar is 80KN/m.
7. Speed of paper machine production: 70m/min.
8. The formed glossy watermark anti-counterfeiting paper has 16% of watermark part gloss and 8% of non-watermark part gloss
9. The paper is placed on a tabletop, the watermark pattern can be observed in head-up view, and the watermark pattern can be observed under the condition of light transmission. The head-up luster watermark recognition function is added.
Example 2 330g/m 2 The plum blossom pattern gloss watermark anti-counterfeiting paper is produced by adopting a three-fold-net paper machine with 1575mm three circular nets.
1. Proportioning and pulping: the bottom pulp material proportion is 30% of softwood pulp, 40% of hardwood pulp and 30% of bagasse pulp. Mixing and pulping softwood pulp and hardwood pulp, and beating degree of 40+/-2 O SR, bagasse pulp beating and beating degree of 36-40 O SR. The middle layer paper pulp adopts BCTMP chemical grinding wood pulp, and the beating degree is 28-32 O SR. The pulp material of the watermark layer is mixed with softwood pulp 45%, hardwood pulp 55%, mixed pulping, and beating degree 46-50 O SR。
2. The auxiliary materials are used: 1.8% of cationic starch dry strength agent, 12% of talcum powder, 120ppm of polyacrylamide retention aid and 1.6% of PAE wet strength agent. The dosage of the auxiliary materials is the proportion of the total absolute dry pulp.
3. Surface sizing: oxidized starch is prepared by adopting polyvinyl alcohol in a ratio of 6:4, the dosage of polyethylene wax is 12% (the ratio of absolute dry weight to total absolute dry weight of polyvinyl alcohol and starch), the dosage of AKD is 20% (the ratio of absolute dry weight to total absolute dry weight of polyvinyl alcohol and starch), the concentration of surface glue is 6.0%, and the viscosity is 32mPa.s. Surface Shi Jiaoshang gel content 1.5g/m 2 。
4. The basis weight of the bottom paper sheet is 80 g/m 2 The intermediate layer paper has a basis weight of 150 g/m 2 Surface watermark paper ration 100 g/m 2 Total basis weight 330g/m 2 。
5. The surface layer watermark layer is a black watermark, the watermark pattern processing mode is a welded watermark pattern, the depth of the watermark pattern is 1.8mm, and the watermark pattern is a plum blossom pattern (figure 5):
6. calendering: and (3) carrying out calendaring treatment on the surface of the dried paper by using a six-roller calendar, wherein the pressure of the calendar is 100KN/m.
7. Speed of paper machine production: 50m/min.
8. The formed glossy watermark anti-counterfeiting paper has the watermark part with the gloss of 19 percent and the non-watermark part with the gloss of 10.5 percent.
9. The paper is placed on a tabletop, the watermark pattern can be observed in head-up view, and the watermark pattern can be observed under the condition of light transmission. The head-up luster watermark recognition function is added.
Example 3 420g/m 2 The five-star pattern gloss watermark anti-counterfeiting paper is produced by a three-layer net paper machine with 1760mm wide width, two long nets and one cylinder net.
1. Proportioning and pulping: the bottom pulp material proportion is 20% of softwood pulp, 60% of hardwood pulp and 20% of cotton pulp. Mixing and pulping softwood pulp, hardwood pulp and cotton pulp, and beating degree is 39-45 O SR. The middle layer pulp is prepared from needle pulp 20%, broadleaf pulp 30%, bagasse pulp 50%, and pulp with beating degree of 32-36 O SR. The watermark layer slurry is prepared from softwood pulp 45%, hardwood pulp 55%, and mixed pulping with beating degree of 50-55 O SR。
2. The auxiliary materials are used: 1.6% of cationic starch dry strength agent, 10% of talcum powder, 100ppm of polyacrylamide retention aid and 1.8% of PAE wet strength agent. The dosage of the auxiliary materials is the proportion of the total absolute dry pulp.
3. Surface sizing: 100% oxidized starch, 20% polyethylene wax (absolute dry to oxidized starch) and 10% AKD (absolute dry to oxidized starch) were used, the concentration of the surface sizing was 8.0% and the viscosity was 38mPa.s. Surface Shi Jiaoshang gel content 2.5g/m 2 。
4. The basis weight of the bottom paper sheet is 120 g/m 2 The basis weight of the middle paper layer is 180 g/m 2 Surface watermark layer ration 120 g/m 2 Total is defined, 420g/m 2 。
5. The surface watermark layer is black watermark, the watermark pattern processing mode is welding watermark pattern, the depth of the watermark pattern is 2.2mm, and the watermark pattern is five-pointed star pattern (figure 6).
6. Calendering: and (3) carrying out calendaring treatment on the surface of the dried paper by using a six-roller calendar, wherein the pressure of the calendar is 120KN/m.
7. Speed of paper machine production: 50m/min.
8. The formed glossy watermark anti-counterfeiting paper has the watermark part with the gloss of 25 percent and the non-watermark part with the gloss of 12 percent.
9. The paper is placed on a tabletop, the watermark pattern can be observed in head-up view, and the watermark pattern can be observed under the condition of light transmission. The head-up luster watermark recognition function is added.
Example 4 350g/m 2 The chrysanthemum pattern gloss watermark anti-counterfeiting paper is produced by adopting a 1760mm three-layer net paper machine, wherein the base paper is a long net paper layer, the sizing agent is white sizing agent, the middle layer is a cylinder paper layer, the sizing agent is a gray paper layer, and the surface layer is a white watermark paper layer.
1. Proportioning and pulping: the pulp material proportion of the base paper fourdrinier layer pulp is 20% of softwood pulp, 30% of hardwood pulp and 50% of waste paper pulp. Mixing and pulping softwood pulp, hardwood pulp and waste paper pulp, and beating degree is 35-38 O SR. The middle layer paper cylinder mould pulp layer pulp mixture ratio is 20% of softwood pulp, 30% of hardwood pulp, 50% of waste paper pulp and 35-38 of beating and beating degree O SR. Dye consumption DB-G0.57% (medium paper absolute dry pulp), 2GL0.102% (medium paper absolute dry pulp), 4BS0.02% (medium paper absolute dry pulp), watermark layer pulp 35%, hardwood pulp 65%, mixing beating, beating degree 48-53 O SR。
2. The auxiliary materials are used: 1.8% of cationic starch dry strength agent, 15% of talcum powder, 120ppm of polyacrylamide retention aid and 2.0% of PAE wet strength agent. The dosage of the auxiliary materials is the proportion of the total absolute dry pulp.
3. Surface sizing: mixing polyvinyl alcohol and oxidized starch in a ratio of 3:7, wherein the dosage of polyethylene wax is 18%, the dosage of AKD is 12%, the concentration of surface glue is 7.0%, and the viscosity is 36mPa.s. Surface Shi Jiaoshang gel content 2.0g/m 2 。
4. The white paper basis weight of the bottom paper is 100 g/m 2 The middle gray paper layer has a basis weight of 150 g/m 2 The white watermark paper layer of the surface layer is 100 g/m 2 Total basis weight 350g/m 2 。
5. The surface watermark layer is black watermark, the watermark pattern processing mode is welding watermark pattern, the depth of the watermark pattern is 2.0mm, and the watermark pattern is chrysanthemum pattern (figure 4).
6. Calendering: and (3) carrying out calendering treatment on the surface of the dried paper by using a six-roller calender, wherein the pressure of the calender is 110KN/m.
7. Speed of paper machine production: 50m/min.
8. The formed glossy watermark anti-counterfeiting paper has the watermark part of 23% of gloss and the non-watermark part of 11% of gloss. And because the middle layer is a gray paper layer, the contrast between the watermark pattern and the non-pattern part of the lining surface layer is more obvious, and the anti-counterfeiting pattern is easier to identify.
9. The paper is placed on a tabletop, the watermark pattern can be observed in head-up view, and the watermark pattern can be observed under the condition of light transmission. The head-up luster watermark recognition function is added.
10. The three-layer net paper machine for producing the glossy watermark anti-counterfeiting paperboard has the characteristics that the surface layer and the bottom layer paper can adopt one color, and the middle can adopt other colors, so that the color contrast is poor, the glossy watermark display is more obvious and the glossy watermark is easier to identify.
Example 5 250g/m 2 The five-star pattern gloss watermark anti-counterfeiting paper is produced by adopting a 1575mm two-layer mesh paper machine, wherein the base paper is a long mesh paper sheet layer, the sizing agent is orange sizing agent, and the surface layer is a white watermark paper layer. The three-fold net paper machine can adopt two nets to produce two-fold net paper.
1. Proportioning and pulping: the pulp material proportion of the base paper fourdrinier layer pulp is 20% of softwood pulp, 30% of hardwood pulp and 50% of waste paper pulp. Mixing and pulping softwood pulp, hardwood pulp and waste paper pulp, and beating degree is 35-38 O SR. The dye consumption is 2QL0.38% (the absolute dry pulp amount of the bottom layer paper), the BRL is 0.04% (the absolute dry pulp amount of the bottom layer paper), the BRL is 4BS0.12% (the absolute dry pulp amount of the bottom layer paper), the watermark layer pulp is prepared from 35% of softwood pulp, 65% of hardwood pulp, and the pulp beating degree is 48-53 O SR。
2. The auxiliary materials are used: 1.8% of cationic starch dry strength agent, 15% of talcum powder, 120ppm of polyacrylamide retention aid and 2.0% of PAE wet strength agent. The dosage of the auxiliary materials is the proportion of the total absolute dry pulp.
3. Surface sizing: mixing polyvinyl alcohol and oxidized starch in a ratio of 2:3, wherein the dosage of polyethylene wax is 18%, the dosage of AKD is 12%, the concentration of surface glue is 7.0%, and the viscosity is 36mPa.s. Surface Shi Jiaoshang gel content 2.0g/m 2 。
4. The basis weight of the orange paper sheet of the bottom paper is 150 g/m 2 The white watermark paper layer of the surface layer is 100 g/m 2 Total basis weight 250g/m 2 。
5. The surface watermark layer is black watermark, the watermark pattern processing mode is welding watermark pattern, the depth of the watermark pattern is 2.0mm, and the watermark pattern is five-star pattern (figure 6).
6. Calendering: and (3) carrying out calendaring treatment on the surface of the dried paper by using a six-roll calendar, wherein the pressure of the calendar is 90KN/m.
7. Speed of paper machine production: 70m/min.
8. The formed glossy watermark anti-counterfeiting paper has 22% of watermark part gloss and 10% of non-watermark part gloss. And because the bottom paper is an orange paper layer, the contrast between the watermark pattern and the non-pattern part of the lining surface layer is more obvious, and the anti-counterfeiting pattern is easier to identify.
9. The paper is placed on a tabletop, the watermark pattern can be observed in head-up view, and the watermark pattern can be observed under the condition of light transmission. The head-up luster watermark recognition function is added.
10. The two-fold net can be used for producing the glossy watermark anti-counterfeiting paper, the difference is different from the three-fold net, and when the bottom layer paper is a paper layer with color, the color of the watermark layer is different from that of the bottom layer paper.
Comparative example 1: comparison of single-network watermarks with triple-network watermarks
Production of 250g/m with a single cylinder machine of examples 1 and 1760mm 2 The cylinder watermark is compared, and 35% of softwood pulp, 65% of hardwood pulp, mixed beating and beating degree of beating are adopted for producing single cylinder watermark paper, and the beating degree is 42-46 O SR. 1.5% of cationic starch dry strength agent, 15% of talcum powder, 140ppm of polyacrylamide retention aid and 1.8% of PAE wet strength agent. The dosage of the auxiliary materials is the same as that of the traditional Chinese medicineProportion of the total amount of oven dried pulp. The depth of the welded watermark pattern is 1.5mm, 100% polyvinyl alcohol is adopted for surface sizing, the dosage of polyethylene wax is 5% (absolute dry weight to absolute dry weight of polyvinyl alcohol), the dosage of AKD is 30% (absolute dry weight to absolute dry weight of polyvinyl alcohol), the concentration of surface glue is 6.0%, and the viscosity is 35mPa.s. Surface Shi Jiaoshang gel content 1.5g/m 2 . Produced 250g/m 2 The watermark anti-counterfeiting paper has poor watermark definition, when the paper is flatly laid, the surface of the paper is matt with watermark, the watermark pattern can not be seen under the condition of light-tightness, and the watermark pattern can not be observed under the condition of light-tightness of the paper.
Comparative example 2: comparison of weld watermark with press-net watermark
Compared with the example 2, the watermarking method is changed into the conventional screen pressing watermarking method, the depth of the watermark pattern is 1.2mm, the pulp is prepared from 45% of softwood pulp, 55% of hardwood pulp, and the pulp beating degree is 46-50 O SR. 1.8% of cationic starch dry strength agent, 12% of talcum powder, 120ppm of polyacrylamide retention aid and 1.6% of PAE wet strength agent. The dosage of the auxiliary materials is the proportion of the total absolute dry pulp. The surface sizing adopts oxidized starch with the proportion of polyvinyl alcohol of 5:4, the dosage of polyethylene wax of 12 percent, the dosage of AKD of 20 percent, the concentration of the surface sizing of 6.0 percent and the viscosity of 32mPa.s. Surface Shi Jiaoshang gel content 1.5g/m 2 . Basis weight 330g/m 2 . 330g/m produced 2 The watermark anti-counterfeiting paper has poor surface watermark glossiness, the watermark pattern can not be seen under the condition of light-tightness, and the watermark pattern can be barely observed under the condition of light-tightness.
Comparative example 3: comparison of surface sizing with polyethylene wax and AKD with no polyethylene wax and AKD
As compared with example 3, other conditions were the same as example 3, and the surface sizing was performed by a surface sizing method using plain paper, namely, 100% PVA, 100% oxidized starch, and PVA and oxidized starch were used in different proportions, the concentration of the surface sizing solution was 6.0%, and the surface sizing amount was 1.5g/m 2 . 180 g/m of the produced 2 The watermark anti-counterfeiting paper has poor surface watermark glossiness, the watermark pattern can not be seen under the condition of light-tightness, and the watermark pattern can be observed under the condition of light-tightness.
Comparative example 4: comparison of Using calendering with not using calendering
Compared with the examples 1, 2, 3, 4 and 5, the paper is directly formed into paper after being sized and dried by hot air and a dryer without a calender, the gloss of the watermark pattern part formed by comparison is not obviously compared with the gloss of the non-watermark part, and the watermark gloss difference of the paper surface cannot be clearly identified in a plane view.
Comparative example 5: after surface sizing, drying in a hot air-free oven, and directly contacting with a drying cylinder for drying
Compared with the examples 1, 2, 3, 4 and 5, the paper sheet is directly dried in a dryer without hot air drying after being sized, the surface sizing agent is seriously stuck to the cylinder, the glossiness of the paper surface is poor, and the glossiness contrast of the watermark pattern part and the non-watermark pattern part is poor. The gloss of the watermark pattern part is not obviously compared with the gloss of the non-watermark part, and the poor gloss of the watermark on the paper surface cannot be clearly identified in the plane view.
Application of auxiliary agent:
polyvinyl alcohol manufacturers: anhui Wanwei group Limited liability company
Cationic starch and oxidized starch manufacturers: shandong Fuxiang Biotechnology Co.Ltd
Polyethylene wax manufacturer Nanjing Tianshi New Material science and technology Co., ltd
AKD and PAE manufacturers: zibojin chemical industry Co.Ltd
Polyacrylamide retention aid manufacturer: basiff China Co Ltd
Talcum powder manufacturing factories: talc powder plant behind temple
Dye manufacturer:
4BS manufacturer: jinbang dye Co., ltd
DB-G manufacturer, tianjin Adon dye Co., ltd
2GL, 2QL, BRL manufacturers: nanjing iridogue chemical industry Co., ltd
The glossiness is detected by 75 O Angular gloss instrumentAnd (5) measuring the row.
Claims (7)
1. A production method of a gloss watermark anti-counterfeiting paperboard is characterized in that the gloss watermark anti-counterfeiting paperboard comprises surface paper, middle paper and bottom paper, wherein the surface paper is an anti-counterfeiting paper layer with black watermark graphics, and the surface paper, the middle paper and the bottom paper are combined into a piece of 250g/m 2 -420g/m 2 The method comprises adopting three-layer net paper machine to produce, wherein the first and second layers of net form paper of the three-layer net paper machine are plane paper, the third layer of net form paper is anti-counterfeiting paper with black watermark, the three layers of paper are overlapped, the first and second layers of net form paper are bottom and middle paper, the third layer of net form paper is anti-counterfeiting paper with black watermark, the black watermark in the above-mentioned surface layer paper is thicker than the non-image, after the three layers of paper of the surface layer paper, the middle layer paper and the bottom layer paper are combined into a piece of paper, the paper is pressed, dried before sizing, surface sizing, dried after sizing, calendaring and coiled to form the gloss watermark anti-counterfeiting paper with watermark graphics and graphics, the gloss of the watermark graphics and graphics is obviously higher than that of the non-watermark graphics and graphics, the surface sizing adopts polyvinyl alcohol, oxidized starch, polyethylene wax and Alkyl Ketene Dimer (AKD), the polyvinyl alcohol and the oxidized starch endow paper with sizing and film forming properties, the polyethylene wax and the AKD endow paper with a wax layer, and the paper with the wax layer is pressed to generate high gloss at the high point of the paper with the black watermark graphics and graphics.
2. The method for producing a glossy watermark security card paper according to claim 1, wherein the ratio of polyvinyl alcohol to oxidized starch is 10:0-0:10, the ratio of polyethylene wax to the total absolute dry weight of polyvinyl alcohol and oxidized starch is 5-20%, and the ratio of AKD to the total absolute dry weight of polyvinyl alcohol and oxidized starch is 10-30%.
3. The method for producing the glossy watermark anti-counterfeiting paperboard according to claim 1, wherein the first layer of the three-layer mesh paper machine is a fourdrinier wire or a cylinder mould, the second layer of the three-layer mesh paper machine is a fourdrinier wire or a cylinder mould, and the third layer of the three-layer mesh paper machine is a cylinder mould.
4. The method for producing the glossy watermark anti-counterfeiting paperboard according to claim 3, wherein the cylinder mould structure of the third layer of the net is a watermark net welded with a concave on the outer wall of the cylinder mould, and the depth of the watermark net is 1.5-2.2mm.
5. The method for producing the glossy watermark anti-counterfeiting paperboard according to claim 1, wherein the bottom paper pulp adopts two or more of softwood pulp fiber, hardwood pulp fiber, grass pulp fiber, bamboo pulp fiber and cotton pulp fiber in proportion, and is subjected to mixed pulping treatment, and the pulp beating degree is 35-45 O SR, the middle layer pulp material proportion, two or more of softwood pulp fiber, hardwood pulp fiber, mill pulp fiber, grass pulp fiber and bamboo pulp fiber are used in proportion, and the pulp beating degree is 28-45 O SR, the surface paper pulp adopts two or three of softwood pulp fiber, hardwood pulp fiber and cotton pulp fiber, and is mixed and pulped, and the beating degree is 42-55 O SR。
6. The method for producing a glossy watermark security card according to claim 1, wherein the drying step is: after the surface sizing process, the sizing liquid on the surface of the paper is dried by a hot air oven, and then enters a dryer for drying.
7. The method for producing the glossy watermark anti-counterfeiting paperboard according to claim 1, wherein the calendering comprises the following specific steps: after the surface sizing and drying process, the paper with polyethylene wax and AKD on the surface is calendered under the linear pressure of 80-120KN/m by a calender roll, the thickness of the thick liquid of the part with the black watermark pattern is thicker than that of the part without the pattern, the gloss of the part with the bigger pressure, namely the pattern part, is obviously increased, the glossiness of the pattern part is 16-25% under the angle of 75 degrees, and the glossiness of the part without the pattern is 8-12% under the angle of 75 degrees, thus forming the gloss watermark anti-counterfeiting card paper.
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