CN113295622A - Method for comparing transparency of coating - Google Patents
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- CN113295622A CN113295622A CN202010111165.1A CN202010111165A CN113295622A CN 113295622 A CN113295622 A CN 113295622A CN 202010111165 A CN202010111165 A CN 202010111165A CN 113295622 A CN113295622 A CN 113295622A
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Abstract
The invention provides a method for comparing the transparency of a coating, and belongs to the technical field of evaluation of the transparency of the coating. The method provided by the invention comprises the following steps: providing at least two coatings to be compared, wherein one coating is used as a standard sample coating, and the other coatings are used as sample coatings; coating the standard sample paint on the black part and the white part of the black-white cardboard to form a standard sample wet film, and drying to form a standard sample paint film; detecting the color difference between a standard sample paint film of a black part and a standard sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a standard sample delta E; treating the sample coating by the same method to obtain a sample delta E; the clarity of the standard paint and the sample paint was compared according to the standard delta E and the sample delta E. The method can realize the comparison of the transparency of the coating by testing the color difference of the paint film, has simple and easy operation, high result accuracy and intuitive and clear analysis process, fills the blank of using data to compare the transparency of the coating, and can be used for evaluating the transparency of the coating.
Description
Technical Field
The invention relates to the technical field of paint transparency evaluation, in particular to a method for comparing paint transparency.
Background
With the continuous improvement of living standard, people have higher and higher requirements on the coating. Conventional high gloss coatings, although highly transparent, cause light pollution, cause visual fatigue, and are easily dusty, so people prefer to select coatings having different gloss. The high-grade matte coating is favored by consumers due to the characteristics of nature, nobility and elegance; in addition, the surface of the matte coating can conceal slight paint film defects, is easy to construct and is widely welcomed by paint manufacturers. However, the transparency of the coating film is inevitably affected by adding powder materials such as matting powder, wax, filler and the like or additives into the coating. At present, a clear data-based test method for paint transparency does not exist, and the judgment can be carried out by a visual method only through the experience of engineers in paint development or production. But the experience and observation angle of each engineer are different, and the obtained conclusions are not necessarily the same, so that the uniform consensus and standard between the paint manufacturer and the client are difficult to achieve. Therefore, how to reasonably and effectively evaluate the transparency of the coating is a problem which needs to be solved at present.
Disclosure of Invention
The invention aims to provide a method for comparing the transparency of a coating, the method can realize the comparison of the transparency of the coating by testing the color difference of a paint film, has simple and easy operation, high result accuracy and visual and clear analysis process, fills the blank of using data to compare the transparency of the coating, and can be used for evaluating the transparency of the coating.
In order to achieve the above object, the present invention provides the following technical solutions:
a method of comparing the clarity of a coating comprising the steps of:
providing at least two coatings to be compared, wherein one coating is used as a standard sample coating, and the other coatings are used as sample coatings;
coating the standard sample paint on the black part and the white part of the black-white cardboard to form a standard sample wet film, and drying to form a standard sample paint film; detecting the color difference between a standard sample paint film of a black part and a standard sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a standard sample delta E;
coating the sample paint on the black part and the white part of the black-white cardboard by the same method to form a sample wet film, and drying to form a sample paint film; detecting the color difference between a sample paint film of a black part and a sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a sample delta E;
and comparing the transparency of the standard sample paint and the sample paint according to the standard sample delta E and the sample delta E.
Preferably, the coating to be compared is a varnish.
Preferably, the varnish is wood varnish.
Preferably, the method of applying the standard paint is by drawing with a wire-wound rod.
Preferably, the diameter of the wire-wound rod is 100 μm.
Preferably, the thickness of the standard paint film is 100 μm.
Preferably, the method of drying the standard paint film comprises surface drying and deep drying which are carried out sequentially.
Preferably, the surface drying temperature is room temperature, and the time is 20-40 min; the deep drying temperature is 40-60 ℃, and the time is 1-2 h.
Preferably, the deep drying further comprises cooling for 20-40 min at room temperature.
Preferably, the transparency of the standard paint is better than the transparency of the sample paint if the standard delta E is greater than the sample delta E.
The invention provides a method for comparing the transparency of a coating, which comprises the following steps: providing at least two coatings to be compared, wherein one coating is used as a standard sample coating, and the other coatings are used as sample coatings; coating the standard sample paint on the black part and the white part of the black-white cardboard to form a standard sample wet film, and drying to form a standard sample paint film; detecting the color difference between a standard sample paint film of a black part and a standard sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a standard sample delta E; coating the sample paint on the black part and the white part of the black-white cardboard by the same method to form a sample wet film, and drying to form a sample paint film; detecting the color difference between a sample paint film of a black part and a sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a sample delta E; and comparing the transparency of the standard sample paint and the sample paint according to the standard sample delta E and the sample delta E. The method can realize the comparison of the transparency of the coating by testing the color difference of the paint film, has simple and easy operation, high result accuracy and intuitive and clear analysis process, fills the blank of using data to compare the transparency of the coating, and can be used for evaluating the transparency of the coating.
Drawings
FIG. 1 is a drawing showing the application of sample paint and standard paint on black-and-white cardboard in the present invention; in the figure, 1-black-and-white cardboard, 2-sample paint and 3-standard paint.
Detailed Description
The invention provides a method for comparing the transparency of a coating, which comprises the following steps:
providing at least two coatings to be compared, wherein one coating is used as a standard sample coating, and the other coatings are used as sample coatings;
coating the standard sample paint on the black part and the white part of the black-white cardboard to form a standard sample wet film, and drying to form a standard sample paint film; detecting the color difference between a standard sample paint film of a black part and a standard sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a standard sample delta E;
coating the sample paint on the black part and the white part of the black-white cardboard by the same method to form a sample wet film, and drying to form a sample paint film; detecting the color difference between a sample paint film of a black part and a sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a sample delta E;
and comparing the transparency of the standard sample paint and the sample paint according to the standard sample delta E and the sample delta E.
The invention provides at least two coatings to be compared, wherein one coating is used as a standard sample coating, and the other coatings are used as sample coatings. In the present invention, the coating to be compared is preferably a varnish, more preferably a woodware varnish. In the examples of the present invention, specifically, the aqueous high gloss varnish is used as the paint to be compared, and the paint is prepared by mixing the following components in parts by mass, the water-based high-gloss varnish (called BASE paint for short) comprises 80 parts of acrylic emulsion (preferably XK14 acrylic emulsion of DSM company), 6 parts of film-forming auxiliary agent (preferably prepared by mixing dipropylene glycol methyl ether and dipropylene glycol ethyl ether in a volume ratio of 1: 5), 0.7 parts of Wetting agent (preferably Wetting agent of Ucat chemical (Shanghai) Co., Ltd. under the trade name of UNIQCHEM Wetting 487U), 0.5 parts of Defoaming agent (preferably Defoaming agent of Ucat chemical (Shanghai) Co., Ltd. under the trade name of UNIQCHEM Defoaming 280W), 0.3 parts of leveling agent (preferably leveling agent of Ucat chemical (Shanghai) Co., Ltd. under the trade name of UNIQCHEM levelling 493U), 0.1 part of pH value regulator (preferably Dow AMP 95 regulator), 0.4 parts of thickening agent (preferably Hemmin thickening agent FX1010) and 12 parts of water; the components of the water-based high-gloss varnish are uniformly mixed to obtain the water-based high-gloss varnish.
The invention does not make special requirements on the specific quantity of the coatings to be compared, and can simultaneously realize the comparison of the transparencies of two or more coatings. One of the coatings is designated as a standard sample coating, and the other coatings are designated as sample coatings, only for the convenience of distinguishing the coatings to be compared, and no other special limitation is provided, and a person skilled in the art can designate according to the actual situation, for example, in the embodiment of the present invention, specifically, the BASE paint is used as the coating to be compared, and an equal amount of water-based high gloss varnish is taken and respectively numbered as 1# BASE paint, 2# BASE paint, 3# BASE paint, 4# BASE paint and 5# BASE paint; adding a matting agent (preferably Grace matting agent TS-100) into the No. 2 BASE paint, the No. 3 BASE paint, the No. 4 BASE paint and the No. 5 BASE paint to ensure that the mass content of the matting agent in each sample is respectively 0.8%, 1%, 1.2% and 1.4%, the matting agent is uniformly dispersed, and the fineness of the matting agent is below 30 mu m to be used as a sample BASE paint (namely a sample coating); no. 1 BASE paint was used as a standard BASE paint (i.e., a standard paint) without a matting agent.
The standard sample paint is coated on the black part and the white part of the black-white cardboard to form a standard sample wet film, and a standard sample paint film is formed after the standard sample wet film is dried; and detecting the color difference between the standard sample paint film of the black part and the standard sample paint film of the white part on the black-white cardboard by using a color difference meter, and recording as a standard sample delta E. The black-and-white cardboard of the present invention is not particularly limited, and may be one known to those skilled in the art. In the present invention, the method of applying the standard dope is preferably knife coating using a wire-wound rod, the diameter of which is preferably 100 μm. In the present invention, the thickness of the paint film of the standard is preferably 100 μm. In the present invention, the method of drying the standard paint film preferably comprises surface drying and deep drying which are carried out sequentially. The temperature of the surface drying is preferably room temperature, namely, the room temperature does not need additional heating or cooling, and in the embodiment of the invention, the surface drying is carried out under the condition of 23 ℃; the surface drying time is preferably 20-40 min, and more preferably 30 min. The deep drying temperature is preferably 40-60 ℃, more preferably 50 ℃, the time is preferably 1-2 h, more preferably 1h, and the deep drying is preferably carried out in an oven. In the invention, after the deep drying, the deep drying preferably further comprises cooling for 20-40 min, and more preferably for 30min at room temperature. The method for detecting the color difference between the standard sample paint film of the black part and the standard sample paint film of the white part on the black-and-white cardboard by using the color difference meter is not particularly limited, and the color difference between the black part and the white part (B/W) of the standard sample paint film on the black-and-white cardboard can be measured by using the use method of the color difference meter well known by the technical personnel in the field.
The sample paint is coated on the black part and the white part of the black-white cardboard by adopting the same method to form a sample wet film, and a sample paint film is formed after the sample wet film is dried; and detecting the color difference between the sample paint film of the black part and the sample paint film of the white part on the black-white cardboard by using a color difference meter, and recording as a sample delta E. The method adopts the same method, namely the sample paint is completely processed according to the processing mode of the standard sample paint, and the sample delta E is finally obtained, so that the error can be reduced as much as possible, and the accuracy of the comparison result of the transparency of the paint can be ensured.
In the invention, after the standard sample paint and the sample paint are prepared, the subsequent treatment is preferably carried out on the standard sample paint and the sample paint at the same time, and the standard sample paint and the sample paint are coated on the same black and white cardboard, so as to further reduce errors; taking a sample paint as an example, the application of the sample paint and the standard paint on the black-and-white cardboard is specifically shown in fig. 1.
After a standard sample delta E and a sample delta E are obtained, the transparency of the standard sample paint and the transparency of the sample paint are compared according to the standard sample delta E and the sample delta E, specifically, if the standard sample delta E is larger than the sample delta E, the transparency of the standard sample paint is better than that of the sample paint, namely, the smaller the delta E is, the poorer the transparency of the paint is, and the larger the delta E is, the better the transparency of the paint is.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
Example 1
Mixing 80 parts of acrylic emulsion (concretely XK14 acrylic emulsion of DSM company), 6 parts of film-forming assistant (concretely obtained by mixing dipropylene glycol methyl ether and dipropylene glycol ethyl ether in a volume ratio of 1: 5), 0.7 part of Wetting agent (concretely Wetting agent of Ucat chemistry (Shanghai) Co., Ltd. brand of UNIQCHEM bathing 487U), 0.5 part of Defoaming agent (concretely Defoaming agent of Ucat chemistry (Shanghai) Co., Ltd. brand of UNIQCHEM bathing 280W), 0.3 part of leveling agent (concretely leveling agent of Ucat chemistry (Shanghai) Co., Ltd. brand of UNIQCHEM bathing 493U), 0.1 part of pH value regulator (concretely Dow AMP 95 regulator), 0.4 part of thickener (concretely Haimins thickener FX1010) and 12 parts of water by mass parts to obtain aqueous highlight varnish (called BASE paint for short);
taking equal amounts of the BASE paint, respectively numbering 1# BASE paint, 2# BASE paint, 3# BASE paint, 4# BASE paint and 5# BASE paint; adding flatting powder TS-100 (specifically Grace flatting powder TS-100) into the No. 2 BASE paint, the No. 3 BASE paint, the No. 4 BASE paint and the No. 5 BASE paint, so that the flatting powder TS-100 in each sample respectively accounts for 0.8%, 1%, 1.2% and 1.4% in mass content, is uniformly dispersed, has the fineness of below 30 mu m and is used as a sample BASE paint; no matting powder TS-100 is added into No. 1 BASE paint as standard BASE paint;
scraping and coating the BASE paint of the standard sample on the black part and the white part of the black-white cardboard by using a winding rod with the diameter of 100 mu m to form a wet film of the standard sample with the thickness of 100 mu m; according to the coating method of the standard sample BASE paint, the sample BASE paint is coated on the black part and the white part of the black-white cardboard to obtain a sample wet film with the thickness of 100 mu m; drying each wet film for 30min at room temperature (23 ℃) to realize surface drying, then putting the wet films together with black-white cardboard into a 50 ℃ drying oven for deep drying for 1h, taking out the wet films, and then putting the wet films for 0.5h at room temperature for cooling to respectively obtain a 1# paint film, a 2# paint film, a 3# paint film, a 4# paint film and a 5# paint film;
the 60 DEG specular gloss of each paint film sample of the black part on the black-and-white cardboard was measured according to the method of measuring 20 DEG, 60 DEG and 85 DEG specular gloss of paint films of GB/T9754-2007 color paint and varnish metallic pigment-free paint, and the data was recorded, the results are shown in Table 1;
respectively testing the color difference (delta E, B/W) of each paint film sample on the black-white cardboard between a black part and a white part by using a color difference meter, and recording data, wherein the result is shown in table 1;
comparing the color difference data of each paint film sample, and judging, wherein the larger the Delta E value is, the better the transparency of the paint film sample is; the smaller the Δ E value, the poorer the transparency of the paint film sample.
TABLE 1 color difference test data for each paint film sample in example 1
It is well known that matting agents affect transparency, and the higher the matting agent content, the lower the gloss, and the poorer the transparency. As can be seen from Table 1, the conclusion obtained by the method provided by the invention is consistent with the fact that the color difference of a paint film is tested by using a color difference meter, and the smaller the Delta E value is, the poorer the transparency of the paint is; the larger the Δ E value, the better the coating transparency.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for comparing the clarity of a coating, comprising the steps of:
providing at least two coatings to be compared, wherein one coating is used as a standard sample coating, and the other coatings are used as sample coatings;
coating the standard sample paint on the black part and the white part of the black-white cardboard to form a standard sample wet film, and drying to form a standard sample paint film; detecting the color difference between a standard sample paint film of a black part and a standard sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a standard sample delta E;
coating the sample paint on the black part and the white part of the black-white cardboard by the same method to form a sample wet film, and drying to form a sample paint film; detecting the color difference between a sample paint film of a black part and a sample paint film of a white part on the black-white cardboard by using a color difference meter, and recording as a sample delta E;
and comparing the transparency of the standard sample paint and the sample paint according to the standard sample delta E and the sample delta E.
2. The comparison method according to claim 1, characterized in that the coating to be compared is a varnish.
3. The method of claim 2, wherein the varnish is wood varnish.
4. The comparative method of claim 1 wherein the standard coating is applied by draw down with a wire-wound rod.
5. A method of comparison according to claim 4, wherein the diameter of the wire-wound rod is 100 μm.
6. The comparison method according to claim 1, wherein the thickness of the standard paint film is 100 μm.
7. The comparative method according to claim 1, wherein the method of drying the standard paint film comprises a surface drying and a deep drying which are carried out sequentially.
8. The comparison method according to claim 7, wherein the temperature of the surface drying is room temperature, and the time is 20-40 min; the deep drying temperature is 40-60 ℃, and the time is 1-2 h.
9. The comparison method according to claim 8, wherein the deep drying further comprises cooling at room temperature for 20-40 min.
10. Comparative method according to any of claims 1 to 9, wherein the transparency of the standard paint is better than the transparency of the sample paint if the standard Δ E is larger than the sample Δ E.
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| CN202010111165.1A CN113295622A (en) | 2020-02-24 | 2020-02-24 | Method for comparing transparency of coating |
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| CN202010111165.1A CN113295622A (en) | 2020-02-24 | 2020-02-24 | Method for comparing transparency of coating |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501188A (en) * | 2016-11-15 | 2017-03-15 | 攀钢集团钛业有限责任公司 | Coating covering power detection method and control methods |
| CN109444137A (en) * | 2018-11-11 | 2019-03-08 | 廊坊立邦涂料有限公司 | A kind of detection method of coating black and white lattice covering power |
-
2020
- 2020-02-24 CN CN202010111165.1A patent/CN113295622A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501188A (en) * | 2016-11-15 | 2017-03-15 | 攀钢集团钛业有限责任公司 | Coating covering power detection method and control methods |
| CN109444137A (en) * | 2018-11-11 | 2019-03-08 | 廊坊立邦涂料有限公司 | A kind of detection method of coating black and white lattice covering power |
Non-Patent Citations (1)
| Title |
|---|
| 严美芳: "《印刷包装材料》", 31 October 2017, 文化发展出版社 * |
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Application publication date: 20210824 |