CN111060449A - Novel method for judging discontinuous position of composite paper layer - Google Patents
Novel method for judging discontinuous position of composite paper layer Download PDFInfo
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- CN111060449A CN111060449A CN201911398027.XA CN201911398027A CN111060449A CN 111060449 A CN111060449 A CN 111060449A CN 201911398027 A CN201911398027 A CN 201911398027A CN 111060449 A CN111060449 A CN 111060449A
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- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 37
- 239000011229 interlayer Substances 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 12
- 238000004043 dyeing Methods 0.000 claims abstract description 8
- 238000004513 sizing Methods 0.000 claims abstract description 6
- 238000013329 compounding Methods 0.000 claims abstract description 5
- 239000000975 dye Substances 0.000 claims abstract description 3
- 229920002472 Starch Polymers 0.000 claims description 15
- 235000019698 starch Nutrition 0.000 claims description 15
- 239000008107 starch Substances 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 14
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 108010010803 Gelatin Proteins 0.000 claims description 2
- 239000003086 colorant Substances 0.000 claims description 2
- 229920000159 gelatin Polymers 0.000 claims description 2
- 239000008273 gelatin Substances 0.000 claims description 2
- 235000019322 gelatine Nutrition 0.000 claims description 2
- 235000011852 gelatine desserts Nutrition 0.000 claims description 2
- 150000004676 glycans Chemical class 0.000 claims description 2
- 150000002484 inorganic compounds Chemical class 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims description 2
- 229920001282 polysaccharide Polymers 0.000 claims description 2
- 239000005017 polysaccharide Substances 0.000 claims description 2
- 229920005613 synthetic organic polymer Chemical class 0.000 claims description 2
- 239000000123 paper Substances 0.000 abstract description 27
- 239000000835 fiber Substances 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000011087 paperboard Substances 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000004040 coloring Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 3
- 239000001047 purple dye Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Paper (AREA)
Abstract
The invention discloses a new method for judging the discontinuous position of a composite paper layer, which comprises the following steps: (1) compounding the pulp according to the practical application; (2) dyeing the compound sizing agent of different sizing layers by using different dyeing agents; (3) respectively making the dyed paper pulp into sheets and making into double-layer or multi-layer composite paper; (4) and observing the interlayer state of the broken position of the composite paper. The invention mainly prepares double-layer or multi-layer composite paper or paperboard by dyeing and then making sheets with paper pulp fibers and compounding multi-layer paper pulp, and evaluates the strength of interlayer bonding strength by using an interlayer bonding stripping tester; the method can visually judge the sample disconnection position by dyeing different paper pulps to supplement the defects except the detection data of the interlayer combination stripping tester, and has the advantages of convenient operation, high accuracy and strong operability in a papermaking laboratory.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a novel method for judging a breaking position between composite paper layers.
Background
With the development of the papermaking industry, people develop new paper types and new papermaking additives, and meanwhile, the requirements on papermaking experimental methods are higher and higher, and when the interlayer bonding strength of the paperboard is evaluated, if the disconnection position is between layers or between fibers, the judgment and evaluation of the interlayer spraying enhancement effect of the paperboard are influenced.
In the prior art, the ideal state for evaluating the interlayer bonding strength is the interlayer disconnection, and the interlayer bonding strength can be directly judged by detecting through an interlayer bonding stripping tester.
However, if the fibers are disconnected, the strength of the bonding force between the fibers is reflected by the value measured by the conventional method, the strength of the bonding force between the layers cannot be judged, and the evaluation significance of the detection value on the bonding strength between the layers is not large.
Disclosure of Invention
The invention aims to provide a novel method for judging the discontinuous position of the composite paper layer, aiming at the defects in the prior art, the discontinuous position of the composite paper layer can be visually judged to supplement the defects of an interlayer combination stripping tester except the detection data, and the method is convenient to operate, high in accuracy and extremely high in operability in a papermaking laboratory.
In order to achieve the purpose, the invention adopts the technical scheme that:
the new method for judging the position of the discontinuity of the composite paper layer comprises the following steps:
(1) compounding the pulp according to the practical application;
(2) dyeing the compound sizing agent of different sizing layers by using different dyeing agents;
(3) respectively making the dyed paper pulp into sheets and making into double-layer or multi-layer composite paper;
(4) and observing the interlayer state of the broken position of the composite paper.
Preferably, in the step (1), the compound slurry comprises slurry, a dry strength agent and/or a retention and drainage aid.
Preferably, the slurry accounts for 0.5-2% of the total mass of the compound slurry.
Preferably, each ton of slurry contains 5-20 kg of dry strength agent, and the dry strength agent is one or more of natural polysaccharide dry strength agent, animal gelatin dry strength agent and synthetic polyacrylamide dry strength agent.
Preferably, the retention and drainage aid accounts for 100-500ppm of the total mass of the compound slurry, and the retention and drainage aid is one or more of inorganic compounds, natural modified compounds and synthetic organic polymers.
Preferably, in the step (2), the coloring agent accounts for 5-20ppm of the total mass of the compound slurry.
Preferably, in the step (3), the gram weight of the composite paper is 80-300g/m2。
Preferably, in the step (3), the two or more layers of composite paper are compounded before the wet paper is pressed and after the starch is sprayed.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
the invention mainly prepares double-layer or multi-layer composite paper or paperboard by dyeing and then making sheets with paper pulp fibers and compounding multi-layer paper pulp, and evaluates the strength of interlayer bonding strength by using an interlayer bonding stripping tester; the method can visually judge the sample disconnection position by dyeing different paper pulps to supplement the defects except the detection data of the interlayer combination stripping tester, and has the advantages of convenient operation, high accuracy and strong operability in a papermaking laboratory.
Drawings
FIG. 1 is a schematic view of an open position in a comparative example;
FIG. 2 is a schematic view of the break between fibers in example 1;
fig. 3 is a schematic view of interlayer disconnection in example 1.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Example 1:
(1) the experimental process comprises the following steps:
the gram weight of the corrugated paper pulp and the papermaking surface pulp is 75g/m2The gram weight of the bottom pulp manufactured by paper making is 75g/m2；
(2) The experimental process comprises the following steps:
weighing the pulp with the gram weight, adding a dry strength agent sample (10 kg/ton of paper), evenly stirring, evenly dividing into two parts, taking one part as flour pulp, making into sheets, forming, and transferring by using absorbent paper for later use; the other part is base stock, and 10ppm purple dye is added for coloring and sheet making and forming; transferring the bottom pulp pattern with the manufactured surface pulp pattern, detecting the interlayer bonding strength after squeezing, drying and balancing moisture, and observing the breaking position of the pattern when detecting the interlayer bonding strength;
(3) and (4) experimental conclusion:
as a result, as shown in fig. 2 and 3, it can be quickly judged whether the pattern is broken between layers or between fibers.
Comparative example:
(1) the experimental process comprises the following steps:
the gram weight of the corrugated paper pulp and the papermaking surface pulp is 75g/m2The gram weight of the bottom pulp manufactured by paper making is 75g/m2；
(2) The experimental process comprises the following steps:
weighing the pulp with the gram weight, adding a dry strength agent sample (10 kg/ton of paper), evenly stirring, evenly dividing into two parts, taking one part as flour pulp, making into sheets, forming, and transferring by using absorbent paper for later use; the other part is bottom pulp, and the pulp is made into sheets and formed; transferring the bottom pulp pattern with the manufactured surface pulp pattern, detecting the interlayer bonding strength after squeezing, drying and balancing moisture, and observing the breaking position of the pattern when detecting the interlayer bonding strength;
(3) and (4) experimental conclusion:
as a result, as shown in fig. 1, it was not possible to accurately judge whether the breaking position was between the layers or between the fibers.
Application example 1:
(1) the experimental process comprises the following steps:
the mixture ratio of the pulp is needle-leaved pulp: broad leaf pulp: chemical-mechanical pulp is 3.0:30: 40; spraying the double-layer pulp between layers, wherein the amount of sprayed starch is 15Kg/t (according to the amount of 15 kilograms of starch in each ton of finished paper), and the manufacturing gram weight of the face pulp is 50g/m2The papermaking gram weight of the bottom pulp is 100g/m2；
(2) The experimental process comprises the following steps:
weighing the pulp with gram weight, adding 35 Kg/tADD, 10Kg/t dry strength agent and 200ppm synthetic polyacrylamide dry strength agent, weighing the dough with gram weight, making into sheets, and transferring by using absorbent paper for later use; adding 10ppm of purple dye, coloring and sheet making into a base slurry; transferring the bottom pulp pattern with the manufactured surface pulp pattern, detecting the interlayer bonding strength after squeezing, drying and balancing moisture, and observing the breaking position of the pattern when detecting the interlayer bonding strength;
(3) experimental data: as shown in table 1;
TABLE 1
(4) And (4) experimental conclusion:
as can be seen from the interlayer bonding strength data in Table 1, the interlayer bonding strength of each sample is from large to small: raw starch > 1# starch; from the broken positions in table 1, the broken positions of the raw starch are obviously more among the fibers, and the effect of the raw starch is better reflected visually.
Application example 2:
(1) the experimental process comprises the following steps:
the gram weight of the corrugated paper pulp and the papermaking surface pulp is 75g/m2The gram weight of the bottom pulp manufactured by paper making is 75g/m2；
(2) The experimental process comprises the following steps:
weighing the pulp with the gram weight, adding a dry strength agent sample (10 kg/ton of paper), evenly stirring, evenly dividing into two parts, taking one part as flour pulp, making into sheets, forming, and transferring by using absorbent paper for later use; the other part is base stock, and 10ppm purple dye is added for coloring and sheet making and forming; transferring the bottom pulp pattern with the manufactured surface pulp pattern, detecting the interlayer bonding strength after squeezing, drying and balancing moisture, and observing the breaking position of the pattern when detecting the interlayer bonding strength;
(3) experimental data: as shown in table 2;
TABLE 2
(4) And (4) experimental conclusion:
as can be seen from the interlayer bonding strength data in Table 2, the interlayer bonding strength of the starch No. 2 is equivalent to that of the starch No. 1 (+ 1.4%); from the broken positions in table 2, the broken positions of the 2# starch are obviously more among fibers, and the better effect of the 2# starch can be visually reflected.
The experimental result shows that the difference of the quality of the starch cannot be reflected completely only by detecting the interlayer bonding strength data through the interlayer bonding stripping tester; and the breaking position can be judged more visually and quickly by matching with paper pulp dyeing, so that the application effect of the starch is judged.
A series of groping and experiments prove that the method for evaluating the interlayer bonding adhesive has the advantages of visual and accurate experimental result and simple operation, and can be widely used for starch evaluation in a laboratory.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A new method for judging the position of the discontinuity of a composite paper layer is characterized by comprising the following steps:
(1) compounding the pulp according to the practical application;
(2) dyeing the compound sizing agent of different sizing layers by using different dyeing agents;
(3) respectively making the dyed paper pulp into sheets and making into double-layer or multi-layer composite paper;
(4) and observing the interlayer state of the broken position of the composite paper.
2. The method for judging the position of the composite paper layer discontinuity according to claim 1, wherein in the step (1), the compound slurry comprises slurry, dry strength agent and/or retention and drainage aid.
3. The method for judging the position of an open position of a composite paper layer according to claim 2, characterized in that the slurry accounts for 0.5-2% of the total mass of the compound slurry.
4. The method for judging the position of the discontinuity of the composite paper layer according to claim 2, wherein the dry strength agent is contained in 5-20 kg/ton of pulp, and the dry strength agent is one or more of natural polysaccharide dry strength agent, animal gelatin dry strength agent and synthetic polyacrylamide dry strength agent.
5. The method for determining the position of a discontinuity in a composite paper layer according to claim 2, wherein the retention and drainage aid accounts for 100-500ppm of the total mass of the composite slurry, and the retention and drainage aid is one or more of inorganic compounds, natural modified compounds and synthetic organic polymers.
6. The method for judging the position of the discontinuity of the composite paper layer according to claim 1, wherein in the step (2), the coloring agent accounts for 5-20ppm of the total mass of the compound slurry.
7. The method for determining the position of a discontinuity in a composite paper layer according to claim 1, wherein in step (3), the grammage of said composite paper is 80-300g/m2。
8. The method of claim 1, wherein in step (3), the two or more layers of composite paper are combined before the wet paper is pressed and after the starch is sprayed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398027.XA CN111060449A (en) | 2019-12-30 | 2019-12-30 | Novel method for judging discontinuous position of composite paper layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911398027.XA CN111060449A (en) | 2019-12-30 | 2019-12-30 | Novel method for judging discontinuous position of composite paper layer |
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| Publication Number | Publication Date |
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| CN111060449A true CN111060449A (en) | 2020-04-24 |
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| CN201911398027.XA Pending CN111060449A (en) | 2019-12-30 | 2019-12-30 | Novel method for judging discontinuous position of composite paper layer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06286768A (en) * | 1993-03-31 | 1994-10-11 | Toppan Printing Co Ltd | Opening prevention seal |
| CN2592700Y (en) * | 2003-01-03 | 2003-12-17 | 深圳九星印刷包装中心 | Layer dyeing laser transfer paper |
| JP2008038287A (en) * | 2006-08-07 | 2008-02-21 | Daio Paper Corp | Both side colored multi-layered paper |
| CN201835185U (en) * | 2010-06-29 | 2011-05-18 | 浙江永泰纸业集团股份有限公司 | Special positional dyeing paperboard |
| CN107735528A (en) * | 2015-06-30 | 2018-02-23 | 金伯利-克拉克环球有限公司 | Purposes without wood-fibred composition and in carton package |
| CN109187127A (en) * | 2018-09-10 | 2019-01-11 | 中国林业科学研究院林业新技术研究所 | Observe the preparation method of the slice dyed blended liquid and slice of xylem parenchyma |
-
2019
- 2019-12-30 CN CN201911398027.XA patent/CN111060449A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06286768A (en) * | 1993-03-31 | 1994-10-11 | Toppan Printing Co Ltd | Opening prevention seal |
| CN2592700Y (en) * | 2003-01-03 | 2003-12-17 | 深圳九星印刷包装中心 | Layer dyeing laser transfer paper |
| JP2008038287A (en) * | 2006-08-07 | 2008-02-21 | Daio Paper Corp | Both side colored multi-layered paper |
| CN201835185U (en) * | 2010-06-29 | 2011-05-18 | 浙江永泰纸业集团股份有限公司 | Special positional dyeing paperboard |
| CN107735528A (en) * | 2015-06-30 | 2018-02-23 | 金伯利-克拉克环球有限公司 | Purposes without wood-fibred composition and in carton package |
| CN109187127A (en) * | 2018-09-10 | 2019-01-11 | 中国林业科学研究院林业新技术研究所 | Observe the preparation method of the slice dyed blended liquid and slice of xylem parenchyma |
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Application publication date: 20200424 |