CN114720361A - Paper pattern aging test method suitable for white cardboard - Google Patents
Paper pattern aging test method suitable for white cardboard Download PDFInfo
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- CN114720361A CN114720361A CN202210320357.2A CN202210320357A CN114720361A CN 114720361 A CN114720361 A CN 114720361A CN 202210320357 A CN202210320357 A CN 202210320357A CN 114720361 A CN114720361 A CN 114720361A
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- 230000032683 aging Effects 0.000 title claims abstract description 39
- 239000000123 paper Substances 0.000 title claims abstract description 30
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000004383 yellowing Methods 0.000 claims abstract description 13
- 238000003878 thermal aging Methods 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 3
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 claims description 21
- 239000007844 bleaching agent Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims 6
- 230000002431 foraging effect Effects 0.000 claims 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000005286 illumination Methods 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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Abstract
The invention relates to a paper pattern aging test method suitable for white cardboard, which relates to the technical field of paper making, and is characterized in that a paper pattern to be tested is cut into a plurality of sample paper pieces, and the sample paper pieces are equally divided into a thermal aging sample and a light aging sample; putting the thermal aging sample into a 105 ℃ oven, putting the optical aging paper sample into an ultraviolet lamp irradiation box to be respectively treated for a plurality of time periods, and respectively testing and recording the indexes of the treated sample; utilizing a color difference calculation formula; returning a calculation formula by using the value of the yellowing factor; parallel tests were performed on white cardboard of different brighteners. The high-temperature or ultraviolet light irradiation is adopted to simulate the temperature and the illumination in a special environment, and more accurate detection data can be provided for the durability of the white cardboard.
Description
Technical Field
The invention relates to the technical field of paper making, in particular to a paper pattern aging test method suitable for white cardboard.
Background
The aging detection of the white cardboard is a key step for inspecting the quality of the white cardboard. The aging detection data of the white cardboard is one of important signs to be inferred to the durability of the white cardboard.
Disclosure of Invention
The invention aims to provide a paper pattern aging test method suitable for white cardboard aiming at the defects and shortcomings of the prior art, which adopts high temperature or ultraviolet light irradiation to simulate the temperature and illumination in a special environment and can provide more accurate detection data for the durability of the white cardboard.
In order to achieve the purpose, the invention adopts the following technical scheme: the operation steps are as follows:
1. preparing a paper pattern:
1.1, cutting a paper sample to be detected into a plurality of sample paper sheets, and equally dividing the sample paper sheets into a thermal aging sample and a light aging sample;
1.2, putting the thermal aging sample into a 105 ℃ oven, putting the optical aging paper sample into an ultraviolet lamp irradiation box to be respectively treated for a plurality of time periods, and respectively testing and recording the indexes of the treated sample;
2. data processing:
2.1, calculating the color difference between the light-emitting aging sample and the heat aging sample by using a color difference calculation formula, wherein the color difference calculation formula is as follows: Δ E [ (Δl)2+ (Δa)2+ (Δb)2]1/2Delta L token love
(ii) a Wherein, the difference value between the brightness test value and the standard value, and delta a represents the difference value between the red-green chroma test value and the standard value; delta b represents the difference value of the yellow-blue chromaticity test value and the standard value; the calculated delta E is slightly sensed visually at 0-0.5, the delta E is slightly sensed visually at 0.5-1.5, the delta E is obviously sensed visually at 1.5-3.0, the delta E is obvious visually at 3.0-6.0, the delta E is very large visually at 6.0-12.0, and the delta E is very strong visually at more than 12.0;
2.2, calculating the yellowing values of the light aging sample and the heat aging sample by using a yellowing value back calculation formula, wherein the yellowing value calculation formula is as follows: PC value 100 × [ (K/S)After aging-(K/S)Before aging](ii) a Wherein K/S ═ 1-R∞)2/2R∞，R∞Is the whiteness value measured on a whiteness meter;
3. and (3) carrying out parallel tests on the white cardboard with different whitening agents, recording data, calculating a yellowing value, and comparing the aging data of the white cardboard with the different whitening agents to obtain the white cardboard with the fastest aging.
Preferably, the size of the sample paper sheet in step 1.1 is 10cm x 10 cm.
Preferably, the plurality of time periods in step 1.2 are 0.5h, 1h, 1.5h, 2h, 4h, 8 h.
Preferably, the indexes in step 1.2 comprise whiteness, brightness, red-green chroma and yellow-blue chroma.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a paper pattern aging test method suitable for white cardboard, which adopts high temperature or ultraviolet irradiation to simulate temperature and illumination in a special environment and can provide more accurate detection data for the durability of the white cardboard.
Drawings
Fig. 1 is a line graph showing the data statistics of the aging test of the white cardboard of different whitening agents according to the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the preferred embodiments in the description are only examples, and all other embodiments obtained by those skilled in the art without any inventive work belong to the protection scope of the present invention.
The specific implementation mode adopts the following technical scheme: the operation steps are as follows:
1. preparation of a paper pattern:
1.1, cutting a paper pattern to be detected into a plurality of sample paper sheets with the size of 10cm multiplied by 10cm, and equally dividing the sample paper sheets into a thermal aging sample and a light aging sample;
1.2, putting the heat-aged sample into a 105 ℃ oven, putting the light-aged sample into an ultraviolet lamp irradiation box to be respectively treated for 0.5h, 1h, 1.5h, 2h, 4h and 8h (aging time accumulation calculation), and respectively testing and recording indexes (including whiteness, brightness, red-green chroma and yellow-blue chroma) of the treated sample;
2. data processing:
2.1, calculating the color difference between the light-emitting aging sample and the heat aging sample by using a color difference calculation formula, wherein the color difference calculation formula is as follows: Δ E [ (Δl)2+ (Δa)2+ (Δb)2]1/2Delta L token love
(ii) a Wherein, the difference value between the brightness test value and the standard value, and delta a represents the difference value between the red-green chroma test value and the standard value; delta b represents the difference value of the yellow-blue chromaticity test value and the standard value; the calculated delta E is slightly sensed visually at 0-0.5, the delta E is slightly sensed visually at 0.5-1.5, the delta E is obvious visually at 1.5-3.0, the delta E is obvious visually at 3.0-6.0, the delta E is very large visually at 6.0-12.0, and the delta E is very strong visually at more than 12.0;
2.2, calculating the yellowing values of the light aging sample and the heat aging sample by using a yellowing value back calculation formula, wherein the yellowing value calculation formula is as follows: PC value 100 × [ (K/S)After aging-(K/S)Before aging](ii) a Wherein K/S ═ 1-R∞)2/2R∞，R∞Is the whiteness value measured on a whiteness meter;
3. the white cardboard of different whitening agents is subjected to parallel tests, data is recorded, the value of the yellow reversion is calculated, and the aging data of the white cardboard of different whitening agents are compared, and the data are detailed in the following table:
| whitening agent A | Whitening agent B | Brightener C | Brightener D | |
| 0.5h | -54.49 | -33.49 | -44.49 | -23.00 |
| 1h | -66.49 | -41.49 | -57.49 | -39.99 |
| 1.5h | -76.99 | -52.49 | -71.99 | -43.49 |
| 2h | -86.48 | -54.49 | -81.98 | -43.99 |
| 4h | -115.48 | -90.98 | -116.98 | -77.48 |
| 8h | -152.97 | -138.47 | -148.47 | -106.98 |
Based on the data in the above table, a line graph is drawn, and as shown in fig. 1, it can be seen from fig. 1 that the white cardboard of brightener a has the most severe yellowing (brightener a is Ishikadisulfonic acid, brightener B is APA-U, brightener C is Ishikatetrasulfonic acid, and brightener D is APF-T).
Compared with the prior art, the beneficial effects of the embodiment are as follows: the embodiment provides a paper pattern aging test method suitable for white cardboard, which adopts high temperature or ultraviolet light irradiation to simulate temperature and illumination in a special environment, and can provide relatively accurate detection data for the durability of the white cardboard.
It will be appreciated by those skilled in the art that modifications and equivalents may be made to the embodiments described above, and that various modifications, equivalents, improvements and the like may be made without departing from the spirit and scope of the invention.
Claims (4)
1. A paper pattern aging test method suitable for white cardboard is characterized by comprising the following steps: the operation steps are as follows:
(1) preparing a paper pattern:
(1.1) cutting a paper sample to be detected into a plurality of sample paper sheets, and equally dividing the sample paper sheets into a thermal aging sample and a light aging sample;
(1.2) putting the thermal aging sample into a 105 ℃ oven, putting the optical aging paper sample into an ultraviolet lamp irradiation box, respectively treating for a plurality of time periods, and respectively testing and recording the indexes of the treated sample;
(2) and data processing:
(2.1) calculating the color difference between the light aging sample and the heat aging sample by using a color difference calculation formula, wherein the color difference calculation formula is as follows: Δ E [ (. DELTA.L)2+(△a)2+(△b)2]1/2(ii) a The calculated delta E is slightly sensed visually at 0-0.5, the delta E is slightly sensed visually at 0.5-1.5, the delta E is obvious visually at 1.5-3.0, the delta E is obvious visually at 3.0-6.0, the delta E is very large visually at 6.0-12.0, and the delta E is very strong visually at more than 12.0;
(2.2) calculating the yellowing values of the light aging sample and the heat aging sample by using a yellowing value back calculation formula, wherein the yellowing value calculation formula is as follows: PC value 100 × [ (K/S)After aging-(K/S)Before aging](ii) a Wherein K/S ═ 1-R∞)2/2R∞，R∞Is the whiteness value measured on a whiteness meter;
(3) and carrying out parallel tests on the white cardboard with different whitening agents, recording data, calculating a yellowing value, and comparing aging data of the white cardboard with different whitening agents to obtain the white cardboard with the fastest aging.
2. The method for aging testing of patterns on ivory board according to claim 1, wherein the method comprises the following steps: the size of the sample paper sheet in said step (1.1) is 10cm x 10 cm.
3. The method for aging testing of patterns on ivory board according to claim 1, wherein the method comprises the following steps: the time periods in the step (1.2) are 0.5h, 1h, 1.5h, 2h, 4h and 8 h.
4. The method for aging testing of patterns on ivory board according to claim 1, wherein the method comprises the following steps: the indexes in the step (1.2) comprise whiteness, brightness, red-green chroma and yellow-blue chroma.
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| CN202210320357.2A CN114720361A (en) | 2022-03-29 | 2022-03-29 | Paper pattern aging test method suitable for white cardboard |
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| CN202210320357.2A CN114720361A (en) | 2022-03-29 | 2022-03-29 | Paper pattern aging test method suitable for white cardboard |
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|---|---|---|---|---|
| JP2000336590A (en) * | 1999-05-27 | 2000-12-05 | Oji Paper Co Ltd | Kraft paper compounded with waste paper pulp |
| CN104198368A (en) * | 2014-09-26 | 2014-12-10 | 攀钢集团钛业有限责任公司 | Quantitative analysis method for melamine decorative paper |
| CN106939525A (en) * | 2017-04-28 | 2017-07-11 | 山东冠军纸业有限公司 | A kind of method that reduction APMP starches YI yellow index |
| CN107266652A (en) * | 2017-07-26 | 2017-10-20 | 上海乘鹰新材料有限公司 | Uvioresistant polyurethane emulsion compositions and preparation method thereof |
| CN111021131A (en) * | 2019-12-27 | 2020-04-17 | 广西大学 | Method for reducing yellowing value of sulfonated chemi-mechanical pulp paper by adopting protease pretreatment |
| CN111270561A (en) * | 2020-02-24 | 2020-06-12 | 亚太森博（山东）浆纸有限公司 | High-whiteness yellowing-resistant coated white cardboard and preparation method thereof |
| CN111705540A (en) * | 2020-06-09 | 2020-09-25 | 陕西师范大学 | Method for delaying aging and yellowing of paper and aging and discoloration of dye and pigment on paper |
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- 2022-03-29 CN CN202210320357.2A patent/CN114720361A/en active Pending
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Application publication date: 20220708 |