CN113155676A - Method for testing paper surface sizing effect - Google Patents
Method for testing paper surface sizing effect Download PDFInfo
- Publication number
- CN113155676A CN113155676A CN202110303524.8A CN202110303524A CN113155676A CN 113155676 A CN113155676 A CN 113155676A CN 202110303524 A CN202110303524 A CN 202110303524A CN 113155676 A CN113155676 A CN 113155676A
- Authority
- CN
- China
- Prior art keywords
- paper
- paper sample
- sample
- dyeing
- dyed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
Abstract
The application discloses a method for testing paper surface sizing effect, which comprises the following steps: acquiring a cut paper sample, wherein the paper sample comprises a first surface and a second surface which are oppositely arranged, and a plurality of sections surrounding the first surface and the second surface; dyeing one section of the paper sample by using a dyeing solvent to form a first dyeing area and a second dyeing area on the section; fixing the dyed paper sample by using two glass slides to form a clamp test sample; fixing the clamp test sample on a glass carrying table of a microscope, observing the clamp test sample by using the microscope, and acquiring the penetration depth of the first dyeing area and/or the second dyeing area along the arrangement direction of the first surface and the second surface so as to evaluate the surface sizing effect of the paper sample according to the penetration depth. Through the mode, the application can intuitively know the sizing effect of the surface of the paper sample, and the visual analysis of the paper surface sizing is realized.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to a method for testing the surface sizing effect of paper.
Background
In the paper industry, surface chemical modification of paper is a common method of improving the print quality of paper. The surface performance, hydrophilicity and attractiveness to different inks of paper can be controlled by surface sizing, and then the aim of improving the printing quality is fulfilled by optimizing the balance between absorption and diffusion of the inks on the surface of the paper, so that the surface sizing technology is an important process flow in the production process of papermaking. In many paper mills, surface sizing has become a standard procedure. At present, a paper making production line mostly uses membrane transfer type sizing, and because the strength and the water resistance of a paper machine banner are different, the sizing mode often has the phenomenon of uneven sizing in the production process.
The sizing effect of the paper is tested by the existing method for testing the sizing effect of the paper, for example, the sizing degree of the paper is tested by the method for testing the COBB (water absorption capacity of the paper and the paperboard surface) value and the IGT foaming speed (printing surface strength), but besides the influence of the surface sizing on the COBB value and the IGT foaming speed, the influence of the internal sizing (ASA change), the internal strength change and the coating strength change on the COBB value and the IGT foaming speed is also great, so the sizing effect of the paperboard in the thickness direction (z direction) cannot be visually evaluated only by testing the COBB value and the IGT foaming speed.
Disclosure of Invention
The technical problem that this application mainly solved provides a method of test paper surface sizing effect, through the penetration depth of glueing starch in the test paper sample cross-section, can solve the problem that can't directly perceived evaluation cardboard thickness direction (z is to) glueing effect.
In order to solve the technical problem, one technical scheme adopted by the application is to provide a method for testing the surface sizing effect of paper, which comprises the following steps: acquiring a cut paper sample, wherein the paper sample comprises a first surface and a second surface which are oppositely arranged, and a plurality of sections surrounding the first surface and the second surface; wherein, the paper sample is paper which is sized by adopting surface sizing liquid; dyeing one section of the paper sample by using a dyeing solvent to form a first dyeing area and a second dyeing area on the section; wherein the first dyed area is adjacent to the first surface and the second dyed area is adjacent to the second surface; fixing the dyed paper sample by using two glass slides to form a clamp test sample; fixing the clamp test sample on a glass carrying table of a microscope, observing the clamp test sample by using the microscope, and acquiring the penetration depth of the first dyeing area and/or the second dyeing area along the arrangement direction of the first surface and the second surface so as to evaluate the surface sizing effect of the paper sample according to the penetration depth.
Wherein, the step of obtaining a cut paper sample comprising a first surface, a second surface and a plurality of cross sections surrounding the first surface and the second surface arranged oppositely comprises: an uncut paper sample is prepared and cut using a cutting device to obtain a cut paper sample.
Wherein, the cutting device comprises a Leica cutter.
Wherein the surface sizing solution comprises starch, and the dyeing solvent comprises a solution containing iodine elementary substance.
The method comprises the following steps of cutting a paper sample, wherein one section of the cut paper sample is dyed by using a dyeing solvent, so that a first dyeing area and a second dyeing area are formed on the section, and the method specifically comprises the following steps: preparing an open container, wherein the open container is filled with a dyeing solvent, and the opening size of the open container is larger than the size of one section of the paper sample; and clamping the paper sample, and enabling one section of the paper sample to vertically contact the surface of the dyeing solvent so as to dye the section.
Wherein, after the completion of the staining, the staining solvent flowing on the cross section is sucked up using a quantitative filter paper.
Wherein, the step of fixing the stained paper sample by using two glass slides to form the clamp test sample specifically comprises the following steps: vertically placing a paper sample in the middle of a complete glass slide, wetting two glass slides by pure water, respectively placing the two glass slides on the complete glass slide in parallel, and enabling the two glass slides to be positioned at the left side and the right side of the paper sample so as to fix the paper sample and form a clamp test sample; wherein, the two glass slides are made by equally dividing a complete glass slide.
The method comprises the following steps of fixing a clamp test sample on a microscope glass carrying table, observing the clamp test sample by using the microscope, obtaining the penetration depth of a first dyeing area and/or a second dyeing area along the arrangement direction of a first surface and a second surface, and evaluating the surface sizing effect of a paper sample according to the penetration depth, wherein the steps specifically comprise: fixing a clamp test sample on a glass carrying table of a microscope, and observing a dyeing section of a paper sample in the clamp test sample by using side light of the microscope; and measuring the distance of the first dyed area and/or the second dyed area along the arrangement direction of the first surface and the second surface by using a ruler on an ocular lens to obtain the penetration depth of the first dyed area and/or the second dyed area along the arrangement direction of the first surface and the second surface, so as to evaluate the surface sizing effect of the paper sample according to the penetration depth.
Wherein the microscope has a magnification of 100 times.
After the step of measuring the distances of the first dyed region and/or the second dyed region along the arrangement direction of the first surface and the second surface by using a ruler on an eyepiece to obtain the penetration depths of the first dyed region and/or the second dyed region along the arrangement direction of the first surface and the second surface, and evaluating the surface sizing effect of the paper sample according to the penetration depths, the method further comprises the following steps: and repeating the measurement steps to obtain the penetration depths of the multiple groups of the first dyeing areas and/or the second dyeing areas along the arrangement direction of the first surface and the second surface so as to evaluate the surface sizing effect of the paper sample according to the multiple groups of the penetration depths.
The beneficial effect of this application is: being different from the prior art, the application provides a method for testing paper surface sizing effect, through the penetration depth of sizing starch in the test paper sample cross-section, can know the sizing effect on paper sample surface directly perceivedly, has realized the visual analysis to paper surface sizing, has remedied the shortcoming that can't directly perceivedly reflect paper surface microcosmic sizing effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of one embodiment of a method of testing the surface sizing effect of paper according to the present application;
FIG. 2 is a schematic view of one embodiment of a cut sheet sample according to the present application;
FIG. 3 is a schematic view under a microscope of the paper sample of FIG. 2 after cross-section staining;
fig. 4 is a flowchart illustrating an embodiment of step S14 in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plural" includes at least two in general, but does not exclude the presence of at least one.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The surface sizing technique is an important technological process in the paper-making production process. In many paper mills, surface sizing has become a standard procedure. At present, a paper making production line mostly uses membrane transfer type sizing, and because the strength and the water resistance of a paper machine banner are different, the sizing mode often has the phenomenon of uneven sizing in the production process.
The sizing effect of the paper is tested by the existing method for testing the sizing effect of the paper, for example, the sizing degree of the paper is tested by the method for testing the COBB (water absorption capacity of the paper and the paperboard surface) value and the IGT foaming speed (printing surface strength), but besides the influence of the surface sizing on the COBB value and the IGT foaming speed, the influence of the internal sizing (ASA change), the internal strength change and the coating strength change on the COBB value and the IGT foaming speed is also great, so the sizing effect of the paperboard in the thickness direction (z direction) cannot be visually evaluated only by testing the COBB value and the IGT foaming speed.
Based on the situation, the application provides a method for testing the paper surface sizing effect, and the problem that the sizing effect in the thickness direction (z direction) of the paperboard cannot be visually evaluated can be solved by testing the penetration depth of sizing starch in the cross section of a paper sample.
The present application will be described in detail below with reference to the drawings and embodiments.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for testing the surface sizing effect of paper according to the present application. As shown in fig. 1, in the present embodiment, the method includes:
s11: acquiring a cut paper sample, wherein the paper sample comprises a first surface and a second surface which are oppositely arranged, and a plurality of sections surrounding the first surface and the second surface; wherein, the paper sample is paper which is sized by adopting surface sizing liquid.
Specifically, please refer to fig. 2, fig. 2 is a schematic diagram of an embodiment of a cut paper sample according to the present application. As shown in fig. 2, the cut paper sample 10 includes a first surface 1 and a second surface 2 disposed opposite to each other, and a section 31, a section 32, a section 33, and a section 34 surrounding the first surface 1 and the second surface 2.
In the present embodiment, an uncut paper sample is prepared, and the uncut paper sample is cut using a cutting device to obtain a cut paper sample 10.
Wherein, the cutting device comprises a Leica cutter.
Wherein the sizes of the cut paper sample 10 are as follows: the length is 8mm, the height is 5-6mm, the width is determined by the thickness of the paper sample 10 itself, and the secondary treatment is not carried out.
The length of the paper sample 10 is determined according to the width of the pattern fixing chuck of the lycra cutter. The height of the paper sample 10 is determined by the height of the objective lens and the microscope stage at a microscope magnification of 100.
In particular, the blade of the lycra cutter is a very sharp diamond cutter, and is generally used in the sample preparation process of ultrathin sections observed by using an electron microscope. The instrument of configuration cutter can set up cutting speed, can enough ensure the planarization of paper cross section at the surely appearance in-process, can also guarantee that paper section structure is not destroyed. If a common scissors is used for cutting the section of the paper pattern, because the cutting speed of the scissors is low and the edges of the common scissors are not sharp enough, pressure is generated on the section of the paper by the two edges of the scissors during cutting, so that the section of the cut paper is distorted or the bottom layers of the paper are gathered together, the shape of the section of the paper is damaged, and the shape of the section of the paper cannot be accurately observed.
In the prior art, the COBB value or the IGT foaming speed of the first surface and/or the second surface of the paper sample is only tested, the section of the paper sample is not observed, the shape of the section of the paper sample is not required, and therefore, the sample preparation is generally carried out by using scissors or a common cutter.
Different from the prior art, the method and the device have the advantages that the Lycra cutter is adopted to cut the paper sample, the structure of the section 31-34 can be guaranteed not to be damaged, the smoothness of the section 31-34 is guaranteed, the paper sample 10 with the complete cross section structure is obtained, and basic guarantee is provided for follow-up accurate observation of the paper section shape.
S12: dyeing one section of the paper sample by using a dyeing solvent to form a first dyeing area and a second dyeing area on the section; wherein the first dyed area is adjacent to the first surface and the second dyed area is adjacent to the second surface.
In this embodiment, the surface size includes starch and a small amount of synthetic copolymer, and the dyeing solvent includes a solution containing iodine as a simple substance.
Wherein, the starch is white powder composed of 10% -30% amylose and 70% -90% amylopectin, the amylose dissolved in water in the starch is curled into a spiral shape by virtue of intramolecular hydrogen bonds, if an iodine simple substance is met, the iodine simple substance is embedded into the gap of the spiral structure and is connected with the amylose by virtue of van der Waals force to form a complex which is apparently blue-black, and therefore, the starch has the characteristic of changing into blue when meeting the iodine simple substance.
Specifically, referring to fig. 3, fig. 3 is a schematic view under a microscope of the cross section of the paper sample in fig. 2 after being stained. As shown in fig. 3, because starch has the characteristic of turning blue when meeting with elemental iodine, after the first surface 1 and the second surface 2 of the paper sample 10 are sized with the surface sizing solution containing starch, and then one of the sections 31 of the paper sample 10 is dyed with the solution containing elemental iodine, a first dyeing region 11 close to the first surface 1 and a second dyeing region 22 close to the second surface 2 are formed on the section 31.
Since the paper machine only applies glue on the surface of the paper sample 10, and the composition material of the paper sample 10 does not contain starch, the area of the interior of the paper sample 10 not penetrated by the surface sizing solution will not change color when encountering iodine simple substance, and only the areas of the first surface 1 and the second surface 2 penetrated by the surface sizing solution will change color when encountering iodine simple substance, and a first dyeing area 11 close to the first surface 1 and a second dyeing area 22 close to the second surface 2 are formed. Therefore, the surface sizing effect of the paper sample 10 can be visually evaluated by observing the penetration depth of the first dyed region 11 and/or the second dyed region 22 in the arrangement direction (z direction) of the first surface 1 and the second surface 2, respectively.
Here, the arrangement direction (z direction) of the first surface 1 and the second surface 2 is generally understood as the thickness direction of the paper sample 10 itself, that is, the width direction of the paper sample 10 mentioned in the present embodiment.
In this embodiment, the solution containing elemental iodine is a potassium iodide solution in which elemental iodine is dissolved.
Specifically, when the paper sample 10 is dyed by using the dyeing solvent, the iodine simple substance in the dyeing solvent needs to have a relatively large concentration, while the solid iodine is a nonpolar molecular crystal and is difficult to dissolve in water with relatively strong polarity, but the iodine simple substance can form I with iodide ions3-Ion, and I3-The ions are easy to dissolve in water, a small amount of potassium iodide crystals are added into the water, and then the iodine simple substance is added, so that the dissolution balance of the iodine can be moved to the direction of dissolving in the water, and the iodine water with higher concentration is obtained.
In this embodiment, in order to dye the section 31 of the paper sample 10, an open container filled with a dyeing solvent and having an opening size larger than the section 31 of the paper sample 10 is prepared, and then the paper sample 10 is gripped with tweezers and the section 31 is vertically contacted with the surface of the dyeing solvent to dye the section 31.
Further, in order to improve the observation effect of the electron microscope on the pattern sample 10, the present embodiment uses a quantitative filter paper to suck the staining solvent flowing on the cross section 31 after the staining is completed.
Specifically, since the bottom light of the electron microscope cannot penetrate through the paper sample 10, the observation is performed by using the side light of the microscope when the section 31 is observed, if the flowing dyeing solvent adheres to the section 31 after dyeing, the dyeing solvent is an excessive solution, and if the excessive solution is not removed, the phenomenon of light return occurs when the observation is performed by using the side light of the microscope, which affects the observation effect.
S13: the stained paper sample was fixed using two slides to form a fixture test sample.
In the embodiment, the paper sample 10 is vertically placed in the middle of a complete glass slide, two glass slides are respectively placed on the complete glass slide in parallel after being wetted by pure water, and the two glass slides are positioned at the left side and the right side of the paper sample 10 so as to fix the paper sample 10 and form a clamp test sample; wherein, the two glass slides are made by equally dividing a complete glass slide.
Specifically, the thickness of the complete glass slide is about 2mm, the height of the paper sample 10 is controlled to be 5-6mm, the overall height of the clamp test sample can reach 7-8 mm, and when the magnification of a microscope is 100 times, the height can meet the requirement of 100 times focal length adjustment of the microscope, so that when the sidelight irradiates the section 31 of the paper sample 10, a good observation effect can be achieved.
S14: fixing the clamp test sample on a glass carrying table of a microscope, observing the clamp test sample by using the microscope, and acquiring the penetration depth of the first dyeing area and/or the second dyeing area along the arrangement direction of the first surface and the second surface so as to evaluate the surface sizing effect of the paper sample according to the penetration depth.
Specifically, referring to fig. 4, fig. 4 is a flowchart illustrating an embodiment of step S14 in fig. 1. As shown in fig. 4, in the present embodiment, the step of fixing the clamp test sample on the glass stage of the microscope, observing the clamp test sample using the microscope, and obtaining the penetration depth of the first dyed region and/or the second dyed region in the arrangement direction of the first surface and the second surface to evaluate the surface sizing effect of the paper sample according to the penetration depth specifically includes:
s41: the fixture test sample was fixed on the glass slide of a microscope, and the dyed cross section of the paper sample in the fixture test sample was observed using the side light of the microscope.
S42: and measuring the distance of the first dyed area and/or the second dyed area along the arrangement direction of the first surface and the second surface by using a ruler on an ocular lens to obtain the penetration depth of the first dyed area and/or the second dyed area along the arrangement direction of the first surface and the second surface, so as to evaluate the surface sizing effect of the paper sample according to the penetration depth.
In the present embodiment, the scale specifications of the microscope used are shown in table 1:
TABLE 1
When the height of a clamp test sample is 7-8 mm, the focus adjustment of 100 times of the microscope can be met, so that the magnification of the microscope in the embodiment is 100 times, and each cell on the eyepiece ruler represents 5.0 mu m.
In this embodiment, when the ruler on the eyepiece is used to measure the distance between the first dyed region 11 and/or the second dyed region 22 along the arrangement direction of the first surface 1 and the second surface 2, the total number of the cells on the eyepiece ruler occupied by the distance between the first dyed region 11 and/or the second dyed region 22 along the arrangement direction of the first surface 1 and the second surface 2 is read, and then the total number of the cells is multiplied by 5.0 μm, so that the penetration depth of the first dyed region 11 and/or the second dyed region 22 along the arrangement direction of the first surface 1 and the second surface 2 can be obtained, and the surface sizing effect of the paper sample 10 is evaluated according to the penetration depth.
Specifically, the greater the penetration depth of the first dyed region 11 and/or the second dyed region 22 in the arrangement direction of the first surface 1 and the second surface 2, the greater the surface sizing amount of the paper sample 10, the better the sizing effect.
When the first surface 1 and the second surface 2 of the paper sample 10 are made of the same material, only the penetration depth of the first dyed area 11 or the second dyed area 22 along the arrangement direction of the first surface 1 and the second surface 2 can be measured; when the first surface 1 and the second surface 2 of the paper sample 10 are made of different materials, it is necessary to measure the penetration depth of the first dyed region 11 and the second dyed region 22 along the arrangement direction of the first surface 1 and the second surface 2.
In the present embodiment, in order to preserve the cross-sectional staining effect map of the paper sample 10, the observed image may be photographed by a photographing device before the measurement is performed with a ruler.
In this embodiment, the shooting device includes an intelligent terminal such as a mobile phone.
In other embodiments, the photographing apparatus may further include an imaging apparatus provided with the microscope, which is not limited in the present application.
Further, in order to make the testing method more accurate, the above measurement steps may be repeated to obtain the penetration depths of the plurality of sets of the first and/or second dyed regions 11 and 22 in the arrangement direction of the first and second surfaces 1 and 2, so as to evaluate the surface sizing effect of the paper sample 10 according to the plurality of sets of the penetration depths.
Specifically, an average value of a plurality of sets of penetration depths may be calculated, and the calculated average value may be used as the penetration depth of the surface sizing liquid.
Wherein, the maximum value and the minimum value in the multiple groups of penetration depths can be obtained.
In the present embodiment, the test data may be 20 to 30 sets.
In other embodiments, the test data may be 40, 50 or more sets, which is not limited in this application.
The method for testing the paper surface sizing effect can complement the method for testing the paper sizing degree in the prior art, for example, the penetration depth of sizing starch in the cross section of a paper sample and the IGT foaming speed of the surface of the paper sample at the same position are tested at the same time, generally speaking, the better the sizing effect is, the larger the IGT foaming speed is, the larger the penetration depth of the sizing starch is, and the positive correlation relationship between the penetration depth of the sizing starch and the IGT foaming speed is presented. In this case, if the IGT foaming of the paper in the cross-web direction fluctuates in the paper machine, the depth of penetration of the sizing starch in the cross-web direction can be observed by this method. If the penetration depth of the sizing starch and the foaming speed of the IGT are in a positive correlation, the paper machine is indicated to have uneven surface sizing solution coating, and the reason of uneven sizing needs to be solved firstly. If the penetration depth of the sizing starch is comparable in the paper machine banner paper pattern, indicating that the surface sizing of the banner is uniform, additional reasons for fluctuations in the air velocity of the IGT of the banner need to be found.
Be different from prior art, this application is through dyeing the cross-section to the paper sample to through the microscope observation and measure the penetration depth of glueing starch in the paper sample cross-section, can understand the glueing effect on paper sample surface directly perceivedly, realized the visual analysis to paper surface glueing, remedied the shortcoming that can't directly perceivedly reflect paper surface microcosmic glueing effect.
The following non-limiting examples are provided to facilitate an understanding of the embodiments of the present application and are set forth in the detailed description to provide further explanation of the embodiments of the present application.
Example 1
Obtaining a cut paper sample A, wherein the paper sample A comprises a first surface and a second surface which are oppositely arranged, and a plurality of sections surrounding the first surface and the second surface; wherein, the paper sample A is paper which is sized by adopting surface sizing solution; dyeing one section of the paper sample A by using a potassium iodide solution dissolved with iodine simple substances to form a first dyeing area and a second dyeing area on the section; wherein the first dyed area is adjacent to the first surface and the second dyed area is adjacent to the second surface; fixing the dyed paper sample A by using two glass slides to form a clamp test sample A; fixing the clamp test sample A on a glass carrying table of a microscope, observing the clamp test sample A by using the microscope, and acquiring the penetration depth of the first dyeing area and the second dyeing area along the arrangement direction of the first surface and the second surface; and repeating the measurement steps to obtain 20-30 groups of penetration depths of the first dyeing area and the second dyeing area along the arrangement direction of the first surface and the second surface.
Example 2
Obtaining a cut paper sample B, wherein the paper sample B comprises a first surface and a second surface which are oppositely arranged, and a plurality of sections surrounding the first surface and the second surface; wherein, the paper sample B is paper which is sized by adopting surface sizing solution; dyeing one section of the paper sample B by using a potassium iodide solution dissolved with iodine simple substances to form a first dyeing area and a second dyeing area on the section; wherein the first dyed area is adjacent to the first surface and the second dyed area is adjacent to the second surface; fixing the dyed paper sample B by using two glass slides to form a clamp test sample B; fixing the clamp test sample B on a glass carrying table of a microscope, observing the clamp test sample B by using the microscope, and acquiring the penetration depth of the first dyeing area and the second dyeing area along the arrangement direction of the first surface and the second surface; and repeating the measurement steps to obtain 20-30 groups of penetration depths of the first dyeing area and the second dyeing area along the arrangement direction of the first surface and the second surface.
For the multiple groups of penetration depths obtained in the above embodiments 1 to 2, the average value, the maximum value, and the minimum value of the penetration depths are respectively obtained, and the test results are shown in table 2:
TABLE 2
As can be seen from the above table, the penetration depth of the first dyeing region in the paper sample a and the paper sample B in the arrangement direction along the first surface and the second surface is greater than the penetration depth of the second dyeing region in the arrangement direction along the first surface and the second surface, which indicates that the sizing amount of the first surface in the paper sample a and the paper sample B is greater than the sizing amount of the second surface, that is, the sizing effect of the first surface in the paper sample a and the paper sample B is better than the sizing effect of the second surface, and the cause of the difference may be related to the material of the first surface and the second surface.
Example 3
Taking the cross-web direction as the direction of the paper sample C, longitudinally cutting two samples at 0.5m, 1.5m, 2.5m, 3.5m, 4.5m, 5.5m, 6.5m and 7.5m of the paper sample C respectively, using one sample group comprising 8 different samples for testing the IGT foaming speed, and measuring and obtaining the penetration depth of the first dyeing area in the 8 samples according to the testing method in the embodiment 1.
For the multiple sets of penetration depths obtained in example 3, the average value, the maximum value, and the minimum value of the penetration depths were obtained, and the average value, the maximum value, and the minimum value of the multiple sets of penetration depths were compared with the IGT bubbling rate, and the comparison results are shown in table 3:
TABLE 3
As can be seen from the above table, the penetration depth of the first dyeing region in the arrangement direction of the first surface and the second surface and the IGT bubbling speed show a positive correlation, which indicates that the surface sizing solution is uniformly coated, and the larger the penetration depth is, the larger the surface sizing amount is, and the higher the printing surface strength of the paper is. Further, the penetration depth and the IGT foaming speed both have a tendency of gradually decreasing and increasing in the cross-web direction, which indicates that uneven sizing occurs during the sizing process of the surface sizing solution, resulting in fluctuation of the IGT foaming speed of the paper machine cross-web paper sample.
According to the method for testing the paper surface sizing effect, the paper surface sizing effect can be visually known through testing the penetration depth of sizing starch in the cross section of the paper sample, the visual analysis of the paper surface sizing is realized, and the defect that the microscopic sizing effect on the paper surface cannot be visually reflected is overcome.
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 of testing the surface sizing effect of paper comprising:
acquiring a cut paper sample, wherein the paper sample comprises a first surface and a second surface which are oppositely arranged, and a plurality of sections surrounding the first surface and the second surface; wherein the paper sample is paper which is sized by adopting a surface sizing solution;
dyeing one of the sections of the paper sample by using a dyeing solvent to form a first dyeing area and a second dyeing area on the section; wherein the first dyed region is proximate to the first surface and the second dyed region is proximate to the second surface;
fixing the dyed paper sample by using two glass slides to form a clamp test sample;
and fixing the clamp test sample on a glass carrying table of a microscope, observing the clamp test sample by using the microscope, and acquiring the penetration depth of the first dyeing area and/or the second dyeing area along the arrangement direction of the first surface and the second surface so as to evaluate the surface sizing effect of the paper sample according to the penetration depth.
2. The method of claim 1, wherein prior to said obtaining a cut paper sample comprising a first surface, a second surface, and a plurality of cross-sections around the first surface and the second surface in opposing relation, comprising:
an uncut paper sample is prepared and cut using a cutting device to obtain the cut paper sample.
3. The method according to claim 2, wherein the cutting device comprises a lycra cutter.
4. The method of claim 1, wherein the surface size comprises starch and the dye solvent comprises a solution comprising elemental iodine.
5. The method according to claim 1, wherein the step of dyeing one of the cross sections of the cut paper sample with a dyeing solvent to form a first dyed area and a second dyed area on the cross section comprises:
preparing an open container containing the staining solvent, the open container having an opening size larger than a size of one of the sections of the paper sample;
and clamping the paper sample, and enabling one section of the paper sample to vertically contact the surface of the dyeing solvent so as to dye the section.
6. The method of claim 1, further comprising:
after the staining was completed, the staining solvent flowed on the cross section was sucked up using a quantitative filter paper.
7. The method of claim 1, wherein the step of fixing the stained paper sample with two slides to form a fixture test sample comprises:
vertically placing the paper sample in the middle of a complete glass slide, wetting the two glass slides by pure water, and respectively placing the two glass slides on the complete glass slide in parallel, wherein the two glass slides are positioned at the left side and the right side of the paper sample so as to fix the paper sample and form the clamp test sample; wherein the two glass slides are made by equally dividing one complete glass slide.
8. The method according to claim 1, wherein the step of fixing the fixture test specimen on a glass stage of a microscope, observing the fixture test specimen using the microscope, and obtaining a penetration depth of the first dyed region and/or the second dyed region in the arrangement direction of the first surface and the second surface to evaluate the surface sizing effect of the paper specimen according to the penetration depth specifically comprises:
fixing the clamp test sample on the glass carrying table of the microscope, and observing the dyed section of the paper sample in the clamp test sample by using the side light of the microscope;
and measuring the distance of the first dyeing region and/or the second dyeing region along the arrangement direction of the first surface and the second surface by using a ruler on an ocular lens to obtain the penetration depth of the first dyeing region and/or the second dyeing region along the arrangement direction of the first surface and the second surface, so as to evaluate the surface sizing effect of the paper sample according to the penetration depth.
9. The method of claim 8, wherein the microscope is at a magnification of 100.
10. The method according to claim 9, wherein after the step of measuring the distance of the first dyed region and/or the second dyed region along the arrangement direction of the first surface and the second surface using a ruler on an eyepiece to obtain the penetration depth of the first dyed region and/or the second dyed region along the arrangement direction of the first surface and the second surface to evaluate the surface sizing effect of the paper sample according to the penetration depth, the method further comprises:
repeating the above measuring steps to obtain the penetration depths of the multiple groups of the first dyed regions and/or the second dyed regions along the arrangement direction of the first surface and the second surface, so as to evaluate the surface sizing effect of the paper sample according to the multiple groups of the penetration depths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110303524.8A CN113155676A (en) | 2021-03-22 | 2021-03-22 | Method for testing paper surface sizing effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110303524.8A CN113155676A (en) | 2021-03-22 | 2021-03-22 | Method for testing paper surface sizing effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113155676A true CN113155676A (en) | 2021-07-23 |
Family
ID=76887895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110303524.8A Pending CN113155676A (en) | 2021-03-22 | 2021-03-22 | Method for testing paper surface sizing effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113155676A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036863A1 (en) * | 2022-08-19 | 2024-02-22 | 中建材创新科技研究院有限公司 | Method for measuring penetration depth of liquid in gypsum board |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188499A (en) * | 1995-06-23 | 1998-07-22 | Cpc国际有限公司 | Swollen starches as papermaking additives |
| CN101449002A (en) * | 2006-01-17 | 2009-06-03 | 国际纸业公司 | Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability |
| CN101963491A (en) * | 2010-09-10 | 2011-02-02 | 珠海华伦造纸科技有限公司 | Papermaking fiber image measuring method |
| CN101983267A (en) * | 2008-03-31 | 2011-03-02 | 国际纸业公司 | Recording sheet with enhanced print quality at low additive levels |
| CN102692424A (en) * | 2012-06-11 | 2012-09-26 | 西安工程大学 | Test method for testing soaking effect of sizing in yarns based on scanning electron microscope |
| US20120301641A1 (en) * | 2010-03-10 | 2012-11-29 | Hewlete-Packard Development Company, L.P. | Surface treatment of print media |
| KR20130039065A (en) * | 2011-10-11 | 2013-04-19 | 중앙대학교 산학협력단 | Sensor for iodine ion, method for detecting iodine ion and method for analyzing a activity of catalyst for forming a chemical bond using the same |
| CN103076323A (en) * | 2012-12-28 | 2013-05-01 | 金红叶纸业集团有限公司 | Method for assessing distribution uniformity of starch in paper |
| CN105527289A (en) * | 2014-09-29 | 2016-04-27 | 芬欧汇川(中国)有限公司 | System used for observing cross section of paper product and observation method thereof |
| CN110749596A (en) * | 2019-09-05 | 2020-02-04 | 北京北汽模塑科技有限公司 | Method for testing thickness of paint film of automobile multi-coating paint part |
-
2021
- 2021-03-22 CN CN202110303524.8A patent/CN113155676A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188499A (en) * | 1995-06-23 | 1998-07-22 | Cpc国际有限公司 | Swollen starches as papermaking additives |
| CN101449002A (en) * | 2006-01-17 | 2009-06-03 | 国际纸业公司 | Paper substrates containing high surface sizing and low internal sizing and having high dimensional stability |
| CN101983267A (en) * | 2008-03-31 | 2011-03-02 | 国际纸业公司 | Recording sheet with enhanced print quality at low additive levels |
| US20120301641A1 (en) * | 2010-03-10 | 2012-11-29 | Hewlete-Packard Development Company, L.P. | Surface treatment of print media |
| CN101963491A (en) * | 2010-09-10 | 2011-02-02 | 珠海华伦造纸科技有限公司 | Papermaking fiber image measuring method |
| KR20130039065A (en) * | 2011-10-11 | 2013-04-19 | 중앙대학교 산학협력단 | Sensor for iodine ion, method for detecting iodine ion and method for analyzing a activity of catalyst for forming a chemical bond using the same |
| CN102692424A (en) * | 2012-06-11 | 2012-09-26 | 西安工程大学 | Test method for testing soaking effect of sizing in yarns based on scanning electron microscope |
| CN103076323A (en) * | 2012-12-28 | 2013-05-01 | 金红叶纸业集团有限公司 | Method for assessing distribution uniformity of starch in paper |
| CN105527289A (en) * | 2014-09-29 | 2016-04-27 | 芬欧汇川(中国)有限公司 | System used for observing cross section of paper product and observation method thereof |
| CN110749596A (en) * | 2019-09-05 | 2020-02-04 | 北京北汽模塑科技有限公司 | Method for testing thickness of paint film of automobile multi-coating paint part |
Non-Patent Citations (1)
| Title |
|---|
| 刘瑞芳等: "《生命科学与工程实验》", 31 May 2016, 中国矿业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024036863A1 (en) * | 2022-08-19 | 2024-02-22 | 中建材创新科技研究院有限公司 | Method for measuring penetration depth of liquid in gypsum board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bratbak | Microscope methods for measuring bacterial biovolume: epifluorescence microscopy, scanning electron microscopy, and transmission electron microscopy | |
| GB2522231B (en) | Method of forming a stain assessment target | |
| EP0946855B1 (en) | Method and devices for measuring distances between object structures | |
| DE202014011332U1 (en) | Microscope, focusing unit, liquid holding unit and optical unit | |
| DE2741068A1 (en) | METHOD AND DEVICE FOR DIAGNOSIS ON TISSUE SAMPLES | |
| JPH03105235A (en) | Cell analysis method and apparatus | |
| CN113155676A (en) | Method for testing paper surface sizing effect | |
| CN109952269A (en) | Microfluidic device | |
| EP2326596A1 (en) | Multi-layer slides for analysis of urine sediments | |
| EP3368935B1 (en) | Specimen delimiting element made of nano-porous material for immersion microscopy | |
| DE3215983C2 (en) | ||
| Cole et al. | International test results for objective lens quality, resolution, spectral accuracy and spectral separation for confocal laser scanning microscopes | |
| EP1347284B1 (en) | Sample holder with integrated optics | |
| EP3435027A1 (en) | Confocal microscope for measuring coating thickness and microscopy method for measuring coating thickness | |
| EP2872254A1 (en) | Method and analysis device for microscopic examination of a tissue section or cell smear | |
| US9091620B2 (en) | Preparing blood smears on a fiber surface | |
| CN103424539A (en) | Quantitative analysis method of cotton/silk cotton blended product | |
| Purington et al. | Visualization of latex and starch in paper coatings by tagging with fluorescent dyes | |
| CN114651201A (en) | System and method for cell count measurement | |
| Tekola et al. | Three‐dimensional confocal laser scanning DNA ploidy cytometry in thick histological sections | |
| JP4946047B2 (en) | Particle standard reagent for formed component classifier | |
| KR20210055091A (en) | Polyolefin microporous membrane, filter, chromatography carrier, and immunochromatographic strip | |
| Kappel et al. | Measurement of printing ink penetration in uncoated papers and its influence on print quality | |
| Ozaki | Application of confocal laser scanning microscopy (CLSM) for observing adhesives in paper | |
| Duggal et al. | Visualization of individual DNA molecules in a small-scale coating flow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |