CN114486597B - Method for detecting wear resistance of printing ink of corrugated case for transportation - Google Patents
Method for detecting wear resistance of printing ink of corrugated case for transportation Download PDFInfo
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- CN114486597B CN114486597B CN202210090387.9A CN202210090387A CN114486597B CN 114486597 B CN114486597 B CN 114486597B CN 202210090387 A CN202210090387 A CN 202210090387A CN 114486597 B CN114486597 B CN 114486597B
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- 238000007639 printing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 125
- 238000005299 abrasion Methods 0.000 claims abstract description 28
- 239000003086 colorant Substances 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000004744 fabric Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000007645 offset printing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000010186 staining Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008313 sensitization 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- General Health & Medical Sciences (AREA)
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- Immunology (AREA)
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- Inks, Pencil-Leads, Or Crayons (AREA)
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Abstract
The invention relates to a method for detecting wear resistance of printing ink of a corrugated case for transportation, which comprises the following steps: step 1, improving a friction testing machine; step 2, cutting and processing a corrugated case sample; step 3, preparing instrument equipment; step 4, selecting a friction test mode of the corrugated case sample: according to the complex color and different colors of the surface of the sample, selecting any one or two of the abrasion-resistant grading test and the same-color density ratio test of the printing ink respectively; step 5, developing a friction test of the corrugated case sample; and step 6, carrying out analysis and judgment on friction test results of the corrugated case samples: the results of the ink abrasion resistance classification test are expressed in terms of a class standard, and the results of the same color density ratio test are expressed in terms of a ratio. The invention represents the detection result by improving the structure of the friction tester, optimizing the operation parameters of the equipment and adopting two different modes, and is more suitable for detecting the wear resistance of the corrugated case printing ink.
Description
Technical Field
The invention relates to the technical field of ink wear resistance measurement, in particular to a method for detecting wear resistance of ink for corrugated boxes for transportation.
Background
At present, no method standard for resisting the abrasion of the corrugated case ink exists, and the detection requirement for resisting the abrasion of the corrugated case ink is not specified in the corrugated case product standard GB/T6543-2008.
The unit frequently encounters the ink wear resistance of part of enterprises and requires to detect the corrugated case, and the detection of the ink wear resistance of the corrugated case is really required in terms of the needs of the existing enterprises and the needs of clients of the enterprises. However, since no corrugated paper product standard is specified and corresponding method standards are lacking, inspection can only be performed with reference to the decorative printed product standard.
For decorative printed matters, although the detection methods of the ink wear resistance are given in the standard GB/T7706-2008 and the standard GB/T7705-2008, the corrugated paper box has the particularity, and the corrugated paper box has the special wear resistance due to the difference of the flute shape, thickness, double flute, single flute, flute height and the like, so that the decorative printed matter ink wear resistance standard is not suitable for detecting the corrugated paper box ink wear resistance standard.
If the abrasion resistance of the corrugated case ink refers to the standard of decorative printed matter: firstly, due to the specificity of the ridges of the corrugated case, the places with serious friction fading are generally found at the ridges in the friction test sample, so that the phenomenon of inconsistent friction between the ridges and the non-ridges can occur in the ink wear-resisting result of the corrugated case, and if the judgment is still carried out from the density value ratio, the judgment is not satisfactory. Secondly, the existing friction testing machine is not designed for corrugated boxes, the design structure, the operation parameters and the inspection conditions of the existing friction testing machine are not suitable for detecting the carton samples, and the phenomenon that the carton samples collapse and are damaged exists. Furthermore, if the density value ratio is adopted to judge the differences of the facing samples for single-color corrugated boxes and color boxes with various colors, the ink wear resistance condition cannot be well reflected.
Disclosure of Invention
The invention provides a method for detecting the wear resistance of printing ink of a corrugated case for transportation, which aims to solve the problem that the conventional wear resistance standard of printing ink is not suitable for detecting the wear resistance of the printing ink of the corrugated case.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the method for detecting the wear resistance of the printing ink of the corrugated case for transportation comprises the following steps of:
Step 1, improvement of a friction testing machine: installing a gasket on the friction table, wherein the gasket increases the friction force with the sample; sample fixing devices are respectively arranged on two sides of the gasket; in order to prevent the corrugated case from compressing, damaging and collapsing, replacing a friction head and a load with the mass of 1.5+/-0.1 kg, and mounting a rubber sheet matched with the outline shape of the bottom of the friction head at the bottom of the friction head to ensure the parallelism of the bottom of the friction head;
Step 2, cutting and processing the corrugated case sample: cutting samples according to the specification of the standard GB/T450, and cutting at least two samples, wherein the specifications of the samples are consistent; meanwhile, carrying out temperature and humidity treatment on the prepared sample according to the specification of the standard GB/T10739;
Step 3, preparing instrument equipment: one friction testing machine meets the requirements of the step 1; the friction paper adopts offset printing paper or friction cloth, the gram weight is 80 g/square meter, the brightness is 75-85%, and the consistency of test results is ensured;
Step 4, selecting a friction test mode of the corrugated case sample: the method comprises any one or two of an ink wear-resisting grading test and a same color density ratio test;
and 5, developing a friction test of the corrugated case sample: the ink wear-resistant grading test comprises the steps of 5.1a, preparing three corrugated box samples, wherein one sample is used for comparison, and the remaining two samples are used for test;
Step 5.2a, respectively installing a sample and friction paper with a friction tester, starting the test, taking down the sample and the friction paper after the test is finished, observing at a place with a good fluorescent lamp or light, and respectively recording the ink change condition on the sample and the ink condition on the friction paper;
Step 5.3a, again performing a test of one sample according to step 5.2 a;
The homochromatic density ratio test comprises the steps of 5.1b, preparing two corrugated box samples, selecting three points for each sample, measuring the density value of each sample respectively, and calculating an initial homochromatic density average value D 0 of each sample;
Step 5.2b, respectively installing a sample and friction paper with a friction tester and starting the friction tester to test, taking down the sample after the test is finished, selecting three points again, respectively measuring the density values of the three points, and calculating a co-color density average value D 1 of the sample after the test;
step 5.3b, again performing a test of one sample according to step 5.2 b;
And 6, carrying out analysis of friction test results of the corrugated case samples: the results of the ink abrasion resistance grading test are expressed in grades, which include the following five grades:
i, the surface of the sample has no obvious friction ink mark, and the friction paper has no obvious ink mark;
II, the surface of the sample is provided with a slight friction ink mark, and the raised edge is provided with an obvious friction mark or a slight friction mark on friction paper;
III, the surface of the sample has obvious continuous friction marks, and the raised edge has color falling or obvious friction marks on friction paper;
IV, a large-area friction trace is formed on the surface of the sample, and the color of the raised edge is fallen off in a large area or the friction trace is formed on friction paper in a large area;
v, the pattern on the surface of the sample is blurred, the color of the raised edge is dropped or heavy friction marks are distributed on the friction paper;
The results of the homochromatic density ratio test are expressed as the ratio, and the abrasion resistance A= (D 1/ D0) x 100%.
In step 1, the liner is used for placing the corrugated case sample, and the liner is of a plate-shaped structure with the friction coefficient not smaller than 0.7, so that the placement stability of the sample is ensured; the sample fixing device is used for limiting corrugated board samples, and comprises a fixing seat and a pressing plate which is arranged on the fixing seat in an up-down adjustable mode, wherein the pressing plate is convenient to adjust up and down and is adapted to samples with different thicknesses.
In the step 1, the friction head and the load are both rectangular structures made of iron blocks, the load is clamped above the friction head, the friction head is convenient to butt and take down, and the installation stability of the friction head and the load is improved;
The bottom size of the friction head is 25mm multiplied by 50mm, and the problem that the conventional friction head is easy to cause collapse and dent of a corrugated case sample is solved by increasing the contact area of the friction head; the rubber sheet with the thickness of 2-3mm and the hardness of 50+/-2 Hs is adhered to the bottom of the friction head, wherein the thickness of the rubber sheet is 25mm multiplied by 50 mm.
In the step 2, in the area with more concentrated ink printing and more graphics, selecting the same position with uniform corrugated paper box thickness and no corrugated collapse, and cutting a sample, wherein the size of the sample is (50+/-2) mm x (230+/-2) mm x d, and d is the paper box thickness; the environmental temperature for cutting and placing the corrugated paper box sample is kept at 23+/-1 ℃ and the humidity is kept at 50+/-2%.
Further, in step3, in addition to the friction testing machine meeting the requirements of step 1, corresponding accessory parts including a friction head and a load meeting the requirements of step 1 are prepared; for the test with higher friction frequency requirement, the friction cloth can be selected, and the friction cloth needs to be white and has no pollution.
Further, in the step 4, aiming at corrugated boxes with complex colors, more colors and less monochromatic parts, an ink wear-resisting grading test is selected; selecting a same-color density ratio test aiming at corrugated boxes with single color, simple color and multiple monochromatic parts; aiming at the high wear-resisting requirement of the corrugated paper box, the ink wear-resisting grading test and the same color density ratio test can be selected at the same time, so that the ink wear-resisting grading test and the same color density ratio test are mutually referenced.
Further, in step 5.2a and step 5.2b, a test specimen and a friction paper are respectively mounted on a friction tester and started to test, specifically comprising: firstly, placing a sample on a liner, and operating a sample fixing device to press two ends of the sample to keep the two ends fixed; then fixing friction paper meeting the requirements at the bottom of a friction head, mounting the friction head and a friction testing machine, and abutting the friction head on the surface of a sample after mounting; then, a load is arranged above the friction head, and the load and the friction head exert pressure on the sample together; finally, starting the friction testing machine, setting the friction frequency to be 60+/-2 times/min, and setting the friction stroke to be 80+/-2 mm; the friction frequency is increased from 43 times/min to 60 times/min, the friction effect is ensured, the friction stroke is increased from 60mm to 80mm, and the situation that the surface pattern of the sample is large is met.
Further, in step 6, aiming at the result of the abrasion resistance grading test of the ink, the color change level of the sample and the color staining level of the friction head are judged at the same time, and the abrasion resistance level is taken as a judgment result; grade I indicates the best wear resistance of the carton ink and grade V indicates the worst wear resistance of the carton ink.
Further, as for the results of the test of the same color density ratio, the larger the abrasion resistance A value is, the better the abrasion resistance of the carton ink is, and the smaller the abrasion resistance A value is, the worse the abrasion resistance of the carton ink is.
Through the technical scheme, the invention has the beneficial effects that:
The principle of the invention is as follows: the friction paper or friction cloth is fixed on the friction head, a fixed load is arranged on the friction head, pressure is applied to the carton sample by the load and the self weight of the friction head, the carton sample ink to be tested is uniformly moved back and forth at the position where the carton sample ink is required to be tested, and the change of the ink on the surface of the test carton sample is observed. According to the situation, two test judging modes of an ink wear-resistant grading test or a same color density ratio test are made, the ink wear-resistant grading test is judged through the wear-resistant grade, and the same color density ratio test is judged through the front-back average density value ratio, so that the problem of wear resistance and specificity of the corrugated case ink is solved.
The invention expresses the detection result by improving the structure of the instrument and equipment, optimizing the operation parameters of the instrument and equipment and adopting two modes, and is more suitable for detecting the wear resistance of the corrugated case ink. The two ways are determined for different experiments or different situations, and for some special situations, two result representation ways can be given for reference at the same time.
Drawings
Fig. 1 is a schematic flow chart of a method for detecting wear resistance of ink for corrugated paper boxes for transportation.
Fig. 2 is a schematic diagram of a friction testing machine developed by the improved method for detecting the wear resistance of the printing ink of the corrugated case for transportation.
Fig. 3 is a schematic diagram showing the grade judgment of the result of the ink abrasion resistance grading test of the method for detecting the abrasion resistance of the ink for the corrugated case for transportation.
The reference numerals in the drawings are: 1 is a tester body, 2 is a friction table, 3 is a pressing strip, 4 is a gasket, 5 is a sample fixing device, 6 is a friction head, 7 is a load, 8 is a rubber sheet, and 9 is friction paper.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings:
As shown in fig. 1 to 3, the method for detecting the wear resistance of the printing ink of the corrugated case for transportation comprises the following steps:
Step 1, improvement of a friction testing machine: based on the existing friction testing machine, the ink is optimized and improved in advance, so that the ink is suitable for detecting the wear resistance of the corrugated case ink.
The friction testing machine is specifically improved as follows: 1. the liner 4 is arranged on the friction table 2, the liner 4 is used for placing a corrugated case sample, the liner 4 is of a plate-shaped structure with a friction coefficient not smaller than 0.7 so as to increase the friction force with the sample, and the liner 4 has certain compressibility and is better attached to the sample.
2. Sample fixing devices 5 are respectively installed on two sides of the gasket 4, the sample fixing devices 5 are used for limiting corrugated board samples, each sample fixing device 5 comprises a fixing seat and a pressing plate which is arranged on the fixing seat in an up-down adjustable mode, bolts are installed on the fixing seat, the bolts are rotated to enable the bolts to move up and down, the pressing plates are driven to drive the pressing plates, the fixing seat can limit two ends of each sample, and the pressing plates are adjustable up and down and can press samples with different thicknesses.
3. The friction head 6 and the load 7 with the replacement mass of 1.5+/-0.1 kg are of rectangular structures made of iron blocks, the load 7 is clamped above the friction head 6, the friction head is tightly matched without shaking during operation, and the rubber sheet 8 matched with the bottom profile shape of the friction head 6 is arranged at the bottom of the friction head.
Specifically, the bottom dimension of the friction head 6 is 25mm multiplied by 50mm, the rubber sheet 8 with the thickness of 25mm multiplied by 50mm is adhered to the bottom of the friction head 6, the rubber sheet 8 is ensured not to fall off during operation, the thickness of the rubber sheet 8 is 2-3mm, and the hardness of the rubber sheet is 50+/-2 Hs. Once the rubber sheet 8 is deformed and hardened, the rubber sheet needs to be replaced in time.
The improved friction tester of the step 1 is shown in fig. 2, and comprises a tester body 1, a friction table 2, pressing strips 3 arranged on two sides of the friction table 2, a gasket 4 arranged between the pressing strips 3 on two sides, sample fixing devices 5 arranged on two sides of the gasket 4, a friction head 6 connected with the tester body 1 and a load 7 arranged on the friction head 6. The friction table 2 is a platform for performing wear resistance test and is also a basis of a friction test device, the pressing strip 3 is fixed on the friction table 2 through bolts, and the liner 4 is fixed on the friction table 2 through the pressing strip 3.
The friction testing machine after the step 1 improvement is the same as a transport corrugated paper box printing ink wear resistance testing device with the application number 2021232816220 applied by the unit of me in structure and principle, and is not described in detail here.
Step 2, cutting and processing the corrugated case sample: and 2.1, cutting samples according to the specification of a standard GB/T450, and selecting the same position where the corrugated paper box is uniform in thickness and has no corrugated collapse in the region which is concentrated in printing ink and contains more graphic characters, and cutting at least two samples, wherein the size of the samples is (50+/-2) mm multiplied by (230+/-2) mm multiplied by d, and d is the thickness of the paper box samples.
And 2.2, carrying out temperature and humidity treatment on the prepared samples according to the specification of the standard GB/T10739, and keeping the ambient temperature of cutting and placing the corrugated case samples at 23+/-1 ℃ and the humidity at 50+/-2%.
The corrugated box sample obtained by cutting cannot have indentation, dirty marks, printing marks and breakage.
Step 3, preparing instrument equipment: the friction testing machine which meets the requirements of the step 1 is provided with corresponding accessory parts except the friction testing machine which meets the requirements of the step 1, and comprises a friction head 6 and a load 7 which meet the requirements of the step 1.
The prepared friction paper 9 adopts offset printing paper or friction cloth, the gram weight of the friction paper is 80 g/square meter, and the brightness is 75-85%; for the test with higher friction frequency requirement, the friction cloth can be selected, and the friction cloth needs to be white and has no pollution.
Step 4, selecting a friction test mode of the corrugated case sample: the method comprises any one or two of an ink wear-resisting grading test and a same color density ratio test.
Specifically, an ink wear-resistant grading test is selected for corrugated boxes with complex colors, more colors and less monochromatic parts. And selecting the same-color density ratio test for the corrugated boxes with single color, simple color and multiple monochromatic positions. Aiming at the high wear-resisting requirement of the corrugated paper box, the ink wear-resisting grading test and the same color density ratio test can be selected at the same time, so that the ink wear-resisting grading test and the same color density ratio test are mutually referenced.
And 5, developing a friction test of the corrugated case sample: and respectively selecting an ink wear-resisting grading test or a same color density ratio test according to different corrugated box samples.
Wherein the ink is subjected to abrasion resistance classification test: the method comprises the steps of 5.1a, preparing three corrugated box samples meeting the requirements of step 2, wherein one sample is used for comparison, and the remaining two samples are used for testing.
And 5.2a, respectively installing a sample and friction paper 9 meeting the requirements of the step 3 with a friction tester, starting the friction tester to test, taking down the sample and the friction paper 9 after the test is finished, observing at a place with a fluorescent lamp or better light, and respectively recording the ink change condition of the sample and the ink condition of the friction paper 9.
Step 5.3a the test of one sample is again carried out according to step 5.2 a.
Co-colour density ratio test: the method comprises the steps of 5.1b, preparing two corrugated paper box samples meeting the requirements of step 2, selecting three points for each sample, measuring the density values of the three points respectively, and calculating an initial homochromatic density average value D 0 of each sample.
And 5.2b, respectively installing a sample and friction paper 9 meeting the requirements of the step 3 with a friction tester, starting the friction tester to test, taking down the sample after the test is finished, selecting three points again, respectively measuring the density values of the three points, and calculating the average value D 1 of the same color density of the sample after the test.
Step 5.3b the test of one sample is performed again according to step 5.2 b.
In step 5.2a and step 5.2b, a test sample and a friction paper 9 are mounted on a friction tester and started to test, and specifically include: firstly, placing a sample on a liner 4, and operating a sample fixing device 5 to keep the sample fixed; then fixing the friction paper 9 meeting the requirements at the bottom of the friction head 6, installing the friction head 6 and a friction testing machine, and pressing the friction paper 9 on the surface of a sample by the friction head 6 after installation; then, a load 7 is arranged above the friction head 6, and the load 7 and the friction head 6 exert pressure on the sample together; finally, starting the friction testing machine, wherein the friction head 6 drives the friction paper 9 to reciprocate linearly along the surface of the sample, the friction times are selected from 20 times, 30 times, 40 times, 50 times, 60 times, 100 times and 200 times per minute according to actual requirements, and the friction frequency is generally set to be 60+/-2 times/min, and the friction stroke is 80+/-2 mm.
And 6, carrying out analysis of friction test results of the corrugated case samples: the results of the ink abrasion resistance grading test are shown in grades, which include the following five grades, as shown in fig. 3:
i, the surface of the sample has no obvious friction ink mark, and the friction paper 9 has no obvious ink mark;
II, the surface of the sample is provided with a slight friction ink mark, and the raised edge is provided with an obvious friction mark or a slight friction mark on friction paper 9;
III, the surface of the sample has obvious continuous friction marks, and the raised edge has color falling or obvious friction marks on friction paper 9;
IV, a large-area friction trace is formed on the surface of the sample, and the color of the raised edge is fallen off in a large area or the friction trace is formed on the friction paper 9 in a large area;
V. The figure on the surface of the sample is blurred, the color of the raised edge drops off or heavy friction marks are distributed on the friction paper 9.
The number of color change steps of the sample and the number of color change steps of the friction head 6 should be determined simultaneously with respect to the results of the abrasion resistance grading test of the ink, and the result of the determination should be the one having the higher abrasion resistance level.
Taking a carton sample with red and single color as an example, the rubbing head 6 is provided with white offset printing paper as the rubbing paper 9, after the rubbing is finished, if only the sample is seen to change, the sample is still red, and almost no color change exists, but the carton sample is not represented, the color is not lost, the wear resistance level is high, meanwhile, the rubbing paper 9 is seen to be stained, and the color loss is also indicated by the red color on the rubbing paper 9. The change of the sample is color change, and the change of the friction paper is color change, namely the color change and the color change are used for judging the result together.
The results of the homochromatic density ratio test are expressed as a ratio, a= (D 1/ D0) ×100%. Wherein A is wear resistance, and the unit is; d 1 is the average value of the same color density after a single sample test; d 0 is the initial average co-colour density of individual samples D 0.
For the results of the same color density ratio test, the larger the abrasion resistance A value is, the better the abrasion resistance of the carton ink is, and the smaller the abrasion resistance A value is, the worse the abrasion resistance of the carton ink is.
The invention is suitable for single corrugated paper boxes and double corrugated paper boxes for transportation, various corrugated paper boxes printed by printing ink, corrugated paper boxes for transportation with PS edition sensitization, corrugated paper boxes for watermark and flexible printing, corrugated paper boxes for transportation with surface coating and other ink wear resistance detection operations.
The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present invention.
Claims (5)
1. The method for detecting the wear resistance of the printing ink of the corrugated case for transportation is characterized by comprising the following steps of:
Step 1, improvement of a friction testing machine: a gasket (4) is arranged on the friction table (2), the gasket (4) is of a plate-shaped structure with the friction coefficient not smaller than 0.7, and the gasket (4) is used for placing a corrugated box sample; sample fixing devices (5) are respectively arranged on two sides of the liner (4), the sample fixing devices (5) are used for limiting corrugated board samples, and the sample fixing devices (5) comprise a fixing seat and a pressing plate which is arranged on the fixing seat in an up-down adjustable manner; a friction head (6) and a load (7) with the mass of 1.5+/-0.1 kg are replaced, and a rubber sheet (8) which is matched with the outline shape of the bottom of the friction head (6) is arranged at the bottom of the friction head;
Step 2, cutting and processing the corrugated case sample: cutting samples according to the specification of the standard GB/T450, and cutting at least two samples; meanwhile, carrying out temperature and humidity treatment on the prepared sample according to the specification of the standard GB/T10739;
step 3, preparing instrument equipment: one friction testing machine meets the requirements of the step 1; the friction paper (9) adopts offset printing paper or friction cloth, the gram weight of the friction paper is 80 g/square meter, and the brightness is 75-85%;
step 4, selecting a friction test mode of the corrugated case sample: the method comprises any one or two of an ink wear-resisting grading test and a same color density ratio test; selecting an ink wear-resisting grading test aiming at corrugated boxes with complex colors, more colors and less monochromatic parts;
selecting a same-color density ratio test aiming at corrugated boxes with single color, simple color and multiple monochromatic parts;
Aiming at the high wear-resisting requirement of the corrugated paper box, an ink wear-resisting grading test and a same color density ratio test can be selected at the same time, so that the ink wear-resisting grading test and the same color density ratio test are mutually referenced;
and 5, developing a friction test of the corrugated case sample: the ink wear-resistant grading test comprises the steps of 5.1a, preparing three corrugated box samples, wherein one sample is used for comparison, and the remaining two samples are used for test;
Step 5.2a, respectively installing and starting a sample and friction paper (9) with a friction tester, taking down the sample and the friction paper (9) after the test is finished, observing at a place with a good fluorescent lamp or light, and respectively recording the ink change condition of the sample and the ink condition of the friction paper (9);
Step 5.3a, again performing a test of one sample according to step 5.2 a;
The homochromatic density ratio test comprises the steps of 5.1b, preparing two corrugated box samples, selecting three points for each sample, measuring the density value of each sample respectively, and calculating an initial homochromatic density average value D 0 of each sample;
Step 5.2b, respectively installing and starting a sample and friction paper (9) with a friction tester to test, taking down the sample after the test is finished, respectively measuring the density values of the three points again, and calculating a co-color density average value D 1 of the sample after the test;
step 5.3b, again performing a test of one sample according to step 5.2 b;
And 6, carrying out analysis of friction test results of the corrugated case samples: the results of the ink abrasion resistance grading test are expressed in grades, which include the following five grades:
i, the surface of the sample has no obvious friction ink mark, and the friction paper (9) has no obvious ink mark;
II, the surface of the sample is provided with a slight friction ink mark, and the raised edge is provided with an obvious friction mark or a slight friction mark on friction paper (9);
III, the surface of the sample has obvious continuous friction marks, and the raised edge has color falling or obvious friction marks on friction paper (9);
IV, a large-area friction trace is formed on the surface of the sample, and the color of the raised edge is fallen off in a large area or the friction trace is formed on friction paper (9);
v, the pattern on the surface of the sample is blurred, the color of the raised edge is fallen off or heavy friction marks are distributed on the friction paper (9);
aiming at the result of the wear-resistant grading test of the printing ink, the color change level of the sample and the staining level of the friction head (6) are judged at the same time, and the result with high wear resistance level is taken as a judging result; grade I indicates that the wear resistance of the carton ink is best, and grade V indicates that the wear resistance of the carton ink is worst;
the result of the same color density ratio test is expressed as a ratio, and the abrasion resistance A= (D 1/ D0) multiplied by 100 percent, and the larger the abrasion resistance A value is, the better the abrasion resistance of the carton ink is, and the smaller the value is, the worse the abrasion resistance of the carton ink is.
2. The method for detecting the wear resistance of the printing ink of the corrugated case for transportation according to claim 1, wherein in the step 1, the friction head (6) and the load (7) are both rectangular structures made of iron blocks, and the load (7) is clamped above the friction head (6);
The bottom of the friction head (6) is 25mm multiplied by 50mm, the rubber sheet (8) with the thickness of 2-3mm and the hardness of 50+/-2 Hs is adhered to the bottom of the friction head (6).
3. The method for detecting the wear resistance of the printing ink of the corrugated case for transportation according to claim 1, wherein in the step 2, in the area which is concentrated in printing ink and contains more pattern words, a sample is selected from the same position of the corrugated case which has uniform and consistent thickness and no corrugated collapse, and the size of the sample is (50+/-2) mm x (230+/-2) mm x d, wherein d is the thickness of the corrugated case;
the environmental temperature for cutting and placing the corrugated paper box sample is kept at 23+/-1 ℃ and the humidity is kept at 50+/-2%.
4. The method for detecting the wear resistance of the printing ink of the corrugated case for transportation according to claim 1, wherein in the step 3, corresponding accessory parts are prepared besides the friction testing machine meeting the requirements of the step 1, and the accessory parts comprise a friction head (6) and a load (7) meeting the requirements of the step 1;
For the test with higher friction frequency requirement, the friction paper (9) can be replaced by friction cloth, and the friction cloth needs to be white and pollution-free.
5. The method for detecting the wear resistance of the printing ink of the corrugated case for transportation according to claim 1, wherein in the step 5.2a and the step 5.2b, a sample and the friction paper (9) are respectively installed and started with a friction tester for testing, and specifically comprises the following steps: firstly, placing a sample on a liner (4), and operating a sample fixing device (5) to press two ends of the sample to keep the two ends fixed; then fixing friction paper (9) meeting the requirements at the bottom of a friction head (6), installing the friction head (6) and a friction testing machine, and abutting the friction head (6) on the surface of a sample after installation; then a load (7) is arranged above the friction head (6), and the load (7) and the friction head (6) exert pressure on the sample together; finally, starting the friction testing machine, setting the friction frequency to be 60+/-2 times/min, and setting the friction stroke to be 80+/-2 mm.
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