CN109211176B - Paper wavy-grain curling test method - Google Patents
Paper wavy-grain curling test method Download PDFInfo
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- CN109211176B CN109211176B CN201810808628.2A CN201810808628A CN109211176B CN 109211176 B CN109211176 B CN 109211176B CN 201810808628 A CN201810808628 A CN 201810808628A CN 109211176 B CN109211176 B CN 109211176B
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- 238000010998 test method Methods 0.000 title claims description 9
- 238000007639 printing Methods 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000010408 film Substances 0.000 claims description 41
- 238000003490 calendering Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 238000009472 formulation Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 abstract description 4
- 239000000976 ink Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000008446 instant noodles Nutrition 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 235000013555 soy sauce Nutrition 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces
Abstract
The application discloses a method for testing curling of paper raised grains, which comprises the following steps: providing a plurality of different papers to be detected and a plurality of identical films, wherein the length of the film is the same as that of the papers to be detected, and the width of the film is smaller than that of the papers to be detected; fixing the same number of films on the multiple papers to be detected in parallel at the same intervals along the width direction of the papers to be detected; respectively carrying out inking printing treatment on the whole paper to be detected; respectively removing films on the paper to be detected, and respectively glazing the whole paper to be detected; the warping heights of the paper to be tested are measured respectively, the reason that the paper generates the wavy veins to curl is evaluated according to the warping heights of the paper to be tested, and by the testing method, the reason that the paper generates the wavy veins to curl can be evaluated, so that the quality of the paper is improved, and the satisfaction degree of customers is improved.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to a paper wavy streak curl testing method.
Background
The coated paper is a paper with a coating layer, is different from double-sided offset paper, and has better printability, and can be divided into double copper, cuprous, single copper and the like due to different coating and calendaring modes. In the field of packaging, single copper has wide application, such as soft package cigarette packets, cigarette packet sealing flowers, soy sauce labels, can labels, instant noodle bowl covers, medicine packets and the like, and complex and different processing technologies have higher requirements on the quality of the single copper.
The single copper curling is an important physical index for evaluating the quality of paper, the paper curling can bring more serious influence to the post-printing processing and use, the positioning error during the post-transverse cutting, hot stamping and die cutting processing can be increased after the printed paper is curled, the paper feeding is unsmooth, the machine is stopped due to paper jam, and the efficiency and the quality of the post-printing processing are seriously influenced.
The inventors of the present application have found in long-term studies that the single copper curl can be classified into two main categories: the first type is that a client cuts a small label after printing and polishing to be integrally curled, and the labels are curled towards a printing surface, a non-printing surface and opposite angles according to the curling direction; the second type is the wave-shaped curling after printing and glazing by customers, and the current laboratory curling evaluation mainly uses constant temperature and humidity equipment to modulate different temperature and humidity to evaluate the anti-curling performance of white samples to indirectly characterize the first type of curling form, but lacks the evaluation of the second type, namely the wave-shaped curling.
Disclosure of Invention
In view of the above, the present application provides a method for testing curling of paper with raised grains, which can evaluate the reason why the paper curls with raised grains.
In order to solve the technical problem, the application adopts a technical scheme that: provided is a paper wavy curl testing method, comprising the following steps:
providing a plurality of different papers to be detected and a plurality of identical films, wherein the length of the films is the same as that of the papers to be detected, and the width of the films is smaller than that of the papers to be detected;
fixing the same number of films on the multiple papers to be detected in parallel at the same intervals along the width direction of the papers to be detected;
respectively carrying out inking printing treatment on the whole paper to be detected;
respectively removing the thin films on the paper to be detected, and respectively glazing the whole paper to be detected;
and respectively measuring the warping heights of the plurality of paper sheets to be detected, and evaluating the reason for the curling of the wavy stripes of the paper sheets according to the warping heights of the plurality of paper sheets to be detected.
Has the advantages that: the paper raised grain curling test method in the application is characterized in that after the film is distributed on the paper to be tested at fixed intervals, the whole paper to be tested is subjected to inking printing treatment, the film is removed, the whole paper to be tested is subjected to glazing treatment, and the simulation is carried out in the actual production process, so that raised grains generated by the paper are curled, the warping heights of a plurality of paper to be tested with differences are evaluated, the reason why the paper is curled is conveniently improved, and the customer satisfaction is improved.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating one embodiment of a method for testing curl of paper waves according to the present application;
FIG. 2 is a schematic structural diagram of a sheet to be measured after a film is fixed thereon;
fig. 3 is a schematic structural diagram of the wavy curling of the paper to be tested.
Detailed Description
Referring to fig. 1 and fig. 2, fig. 1 is a schematic flow chart of an embodiment of a method for testing wavy streaks of paper, and fig. 2 is a schematic structural diagram of the paper to be tested after a film is fixed thereon, where the method includes:
s101: a plurality of different sheets 10 to be tested and a plurality of identical films 20 are provided.
The length of the film 20 is the same as that of the paper 10 to be measured, the width of the film 20 is smaller than that of the paper 10 to be measured, and meanwhile, one side of the film 20 is smooth and the other side is rough.
The method is characterized in that differences exist among a plurality of paper sheets 10 to be tested, the influence of the differences on the paper sheets in wavy curling is evaluated subsequently, meanwhile, because the film 20 does not exist in the production processes of actual printing, glazing and the like, the films 20 are completely the same, the influence of the film 20 on the paper sheets 10 to be tested in wavy curling is guaranteed to be completely the same, and the influence of the film 20 on the paper sheets 10 to be tested is eliminated subsequently when the reason that the paper sheets in wavy curling are evaluated.
S102: the same number of films 20 are fixed in parallel at the same intervals on the plurality of sheets 10 to be measured, respectively, along the width direction of the sheets 10 to be measured.
Referring to fig. 2, the films 20 are fixed in parallel at the same interval on each sheet of paper 10 to be tested, and since the sizes of the plurality of sheets of paper 10 to be tested and the plurality of films 20 are the same, the number of the films 20 fixed on each sheet of paper 10 to be tested is also the same.
S103: the entire sheet 10 to be tested is subjected to the inking printing process.
When the paper 10 to be tested is subjected to ink printing on the whole, the film 20 is fixed on the paper 10 to be tested, so that the part of the paper 10 to be tested covered by the film 20 is not inked, and the rest parts except the part are inked.
In an application scenario, the plurality of test sheets 10 are subjected to an ink printing process along the width direction (as indicated by arrow a) of the test sheet 10.
S104: the films 20 on the paper 10 to be tested are removed respectively, and the whole paper 10 to be tested is polished respectively.
After the film 20 is removed, the entire sheet 10 to be tested is subjected to glazing treatment, and at this time, since the film 20 is removed, the entire sheet 10 to be tested is glazed.
In an application scenario, the entire plurality of sheets 10 to be tested are subjected to glazing processing along the width direction (as indicated by arrow a) of the sheets 10 to be tested.
S105: and respectively measuring the warping heights of the paper 10 to be measured, and evaluating the reason for the wavy curling of the paper according to the warping heights of the paper 10 to be measured.
The root causes of the wavy curling of the paper are: the large and small ink volumes appear regularly on the paper. Because big china ink volume and little china ink volume interval law appear, make the rubber cloth different to the peeling force of paper on the one hand, on the other hand the regional absorbed light oil mass of big china ink volume is less, and the regional absorbed light oil mass of little china ink volume is more, and the paper produces moist piece to lead to the paper to produce the raised grain and curl.
Therefore, in the above steps, the film 20 is fixed on the paper 10 to be tested, so that the position of the paper 10 to be tested covered by the film 20 is ensured not to be printed, and the position of the paper 10 to be tested not covered by the film 20 is printed, so that the phenomenon that the ink amount is large and the ink amount is small can be generated regularly, each paper 10 to be tested can generate wavy veins in different degrees, as shown in fig. 3, fig. 3 is a schematic structural diagram of the paper 10 to be tested generating wavy veins.
At this time, the warping height of each paper 10 to be tested is measured, and the reason for the wavy curling of the paper is evaluated according to the warping height of each paper 10 to be tested and the difference between each paper 10 to be tested, so that the quality of the paper is improved in the actual production process, and the customer satisfaction is improved.
In another embodiment, before step S102, the method further includes:
s106: a plurality of sample application base papers 30 with the same size are provided, wherein the number of the sample application base papers 30 is the same as that of the paper 10 to be tested.
Continuing to refer to fig. 2, the proof backing paper 30 is slightly larger than the paper 10 to be tested, for example, the size of the proof backing paper 30 is set to be 290mm × mm and 270mm, the size of the paper 10 to be tested is set to be 260mm × mm and 210mm, and the size of the film 20 is set to be 260mm × mm and 50 mm.
S107: different pieces of paper 10 to be tested are fixed on different pieces of sample sticking base paper 30 respectively.
After a piece of paper 10 to be tested is fixed on a piece of sample pasting base paper 30, a plurality of films 20 arranged in a row at intervals are fixed on the paper 10 to be tested, wherein the sample pasting base paper 30, the paper 10 to be tested and the films 20 which are arranged in a stacked mode can be fixed together through an adhesive tape 40.
In order to increase the friction force and make the film 20 and the paper 10 to be tested more firmly attached, the rough surface of the film 20 is contacted with the paper 10 to be tested, and the smooth surface of the film 20 is far away from the paper 10 to be tested.
In another embodiment, the step S105 of measuring the warp heights of the plurality of paper sheets 10 to be measured respectively includes:
s1051: a plurality of papers 10 to be tested are respectively placed on the table top.
S1052: and respectively measuring the farthest distances of the plurality of paper sheets 10 to be measured from the desktop, and taking the farthest distances as the warping heights of the paper sheets 10 to be measured.
That is, the warpage heights of the most severe wavy curling positions of the paper 10 to be measured are measured respectively, and the heights are used as the warpage heights to evaluate the reasons of the wavy curling of the paper.
In the foregoing embodiment, the providing a plurality of different paper sheets to be tested in step S101 specifically includes:
s1011: and providing first type paper and second type paper with the same size, wherein the first type paper is the same as the second type paper except that the type, formula, flatness and stack position of the first type paper are different from those of the second type paper.
Namely, only one parameter of the first type of paper is different from that of the second type of paper, and then the influence of the parameter on the wavy curling of the paper is evaluated.
In an application scenario, if the first type of paper is calendered paper and the second type of paper is coated paper, the reason for the wavy curling of the paper is evaluated at the moment, and the evaluation comprises the following steps: the influence of the kind of paper on the generation of wavy curling of the paper was evaluated.
That is, it is specifically evaluated whether the warping height of the calendered paper, at which the wavy curl occurs, is small or the warping height of the coated paper, at which the wavy curl occurs, wherein the test results can be recorded using table 1 below.
TABLE 1 recording of the effect of type on the curling of paper
| Species of | Calender paper | Coated paper |
| Height of warp |
In an application scenario, if the formula of the first type of paper includes the anti-curling material and the formula of the second type of paper does not include the anti-curling material, then the reason for the wavy curling of the paper is evaluated, which includes: the effect of the paper formulation on the development of wavy curling of the paper was evaluated.
That is, it is specifically evaluated whether the curl-resistant material can alleviate the wavy curl of the paper, thereby facilitating the determination of whether the addition of the curl-resistant material to the paper formulation is required during the actual paper production process, wherein the test results can be recorded using table 2 below, FQ representing a first type of paper containing the curl-resistant material in the formulation, and plain representing a second type of paper not containing the curl-resistant material in the formulation.
TABLE 2 notes of the effect of the formulation on the development of wavy streaks curling on paper
| Formulation of | FQ | General purpose |
| Height of warp |
Optionally, in the application scenario, the number of the first type of paper is multiple, and the amount of the anti-curling material contained in the multiple first type of paper is different, that is, at this time, the influence of the anti-curling material with different amount in the paper formula on the wavy curling of the paper can be evaluated, so as to determine the optimal scheme for adding the anti-curling material in the actual paper production process.
In an application scenario, the first type of paper is paper at the middle stack position, the second type of paper is paper at the side stack position, and then the reason why the paper is curled due to raised grains is evaluated at this time, including: and evaluating the influence of the stack position of the paper on the wavy curling of the paper.
That is, by evaluating the influence of the stack position of the paper on the wavy curling of the paper, in the actual production process, the paper can be improved to different degrees according to different stack positions, so that the quality of the paper can be improved to the greatest extent, wherein the test result can be recorded by adopting the following table 3.
Table 3 recording table for influence of stack position on paper wave-like curling
| Stack position | Middle stack position | Side stack position |
| Height of warp |
In an application scenario, the first type of paper is calendered in advance, and the second type of paper is not calendered in advance, so that the reason for the wavy curling of the paper is evaluated at the moment, and the method comprises the following steps: the influence of the flatness of the paper on the occurrence of wavy curling of the paper was evaluated.
That is, by evaluating the influence of the flatness of the paper on the paper, it was determined whether the paper needs to be calendered in advance in order to reduce the occurrence of wavy curling of the paper in the actual production process, wherein the test results can be recorded using table 4 below.
TABLE 4 recording of the influence of calendering on the curling of paper
| Whether or not it is previously subjected to calendering treatment | Is that | Whether or not |
| Height of warp |
Optionally, in the application scenario, the number of the first type of paper is multiple, and the pressure applied to the multiple first type of paper during the calendering process is different.
Specifically, the pressure that receives when a plurality of first type of paper carry out the calendering processing is all different, and the temperature when carrying out the calendering processing is all the same to the aassessment produces the curly influence of raised grain to the paper under different calendering pressures, is convenient for in actual production process, selects the most suitable calendering pressure, guarantees the quality of paper, wherein, can adopt table 5 below to record the test result.
TABLE 5 recording of the influence of calendering pressure on the paper curling
| Pressure/temperature | 70/50 | 50/50 | 30/50 |
| Height of warp |
In summary, different from the situation of the prior art, in the paper wavy curl testing method in the application, after the films are fixed on the paper to be tested and distributed at intervals, the whole paper to be tested is subjected to inking printing processing, and then after the films are removed, the whole paper to be tested is subjected to glazing processing, so that the wavy curl generated by the paper in the actual production process is simulated, and therefore the reason for the wavy curl generated by the paper is evaluated according to the warping heights of a plurality of different paper to be tested, the paper quality is improved conveniently, and the customer satisfaction is improved.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A method for testing the curling of paper raised grains is characterized by comprising the following steps:
providing a plurality of different papers to be detected and a plurality of identical films, wherein the length of the films is the same as that of the papers to be detected, and the width of the films is smaller than that of the papers to be detected;
fixing the same number of films on the multiple papers to be detected in parallel at the same intervals along the width direction of the papers to be detected;
respectively carrying out inking printing treatment on the whole paper to be detected;
respectively removing the thin films on the paper to be detected, and respectively glazing the whole paper to be detected;
and respectively measuring the warping heights of the plurality of paper sheets to be detected, and evaluating the reason for the curling of the wavy stripes of the paper sheets according to the warping heights of the plurality of paper sheets to be detected.
2. The method of claim 1, wherein the providing a plurality of sheets to be tested that differ comprises:
providing first paper and second paper with the same size, wherein the first paper is the same as the second paper except that the type, formula, flatness and stack position of the first paper are different from those of the second paper.
3. The test method according to claim 2,
the first type of paper is calendered paper, the second type of paper is coated paper,
the evaluation of the causes of the wavy curling of the paper comprises the following steps:
the influence of the type of paper on the generation of wavy curling of the paper was evaluated.
4. The test method according to claim 2,
the formulation of the first type of paper includes an anti-curl material, the formulation of the second type of paper does not include an anti-curl material,
the evaluation of the causes of the wavy curling of the paper comprises the following steps:
the effect of the paper formulation on the development of wavy curling of the paper was evaluated.
5. The test method according to claim 2,
the first type of paper is paper at the middle stack position, the second type of paper is paper at the side stack position,
the evaluation of the causes of the wavy curling of the paper comprises the following steps:
evaluating the influence of the stack position of the paper on the wavy curling of the paper.
6. The test method according to claim 2,
the first type of paper is pre-calendered, the second type of paper is not pre-calendered,
the evaluation of the causes of the wavy curling of the paper comprises the following steps:
the effect of the flatness of the paper on the occurrence of wavy curling of the paper was evaluated.
7. The test method according to claim 6,
the number of the first type of paper is multiple, and the pressure applied to the multiple first type of paper during calendering is different.
8. The test method according to claim 1,
the process of inking and printing the whole paper to be detected respectively comprises the following steps:
respectively carrying out inking printing treatment on the whole paper to be detected along the width direction of the paper to be detected;
the polishing treatment is respectively carried out on the whole paper to be detected, and the polishing treatment comprises the following steps:
and respectively glazing the whole paper to be detected along the width direction of the paper to be detected.
9. The method according to claim 1, further comprising, before fixing the same number of films on the plurality of sheets to be tested in parallel at the same intervals in the width direction of the sheets, respectively:
providing a plurality of sample pasting base papers with the same size, wherein the number of the sample pasting base papers is the same as that of the paper to be detected;
and fixing different paper to be detected on different sample sticking base paper respectively.
10. The testing method according to claim 1, wherein the measuring the warpage heights of the plurality of paper sheets to be tested respectively comprises:
respectively placing the plurality of paper sheets to be detected on a desktop;
and respectively measuring the farthest distances of the plurality of paper sheets to be detected from the desktop, and taking the farthest distances as the warping heights of the paper sheets to be detected.
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| CN201810808628.2A CN109211176B (en) | 2018-07-16 | 2018-07-16 | Paper wavy-grain curling test method |
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| CN201810808628.2A CN109211176B (en) | 2018-07-16 | 2018-07-16 | Paper wavy-grain curling test method |
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| CN109211176B true CN109211176B (en) | 2020-07-03 |
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Denomination of invention: Test method for wavy curl of paper Effective date of registration: 20231101 Granted publication date: 20200703 Pledgee: Bank of China Limited by Share Ltd. Zhenjiang Dagang sub branch Pledgor: Goldeast Paper (Jiangsu) Co.,Ltd. Registration number: Y2023980063170 |
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