CN112986135A - Method for testing anti-shedding performance of primer - Google Patents
Method for testing anti-shedding performance of primer Download PDFInfo
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- CN112986135A CN112986135A CN202110209609.XA CN202110209609A CN112986135A CN 112986135 A CN112986135 A CN 112986135A CN 202110209609 A CN202110209609 A CN 202110209609A CN 112986135 A CN112986135 A CN 112986135A
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Abstract
The invention provides a method for testing the anti-shedding performance of a primer, which comprises the following steps: (1) coating putty on the bottom plate, and drying to obtain a first substrate; (2) coating a primer on the putty coating of the first substrate, and drying to obtain a second substrate; (3) sticking the sticker on the surface of the second substrate, and pressurizing to obtain a third substrate; (4) coating the surface of the third substrate with the finish paint, drying and tearing off the sticker, and obtaining the anti-falling test result of the primer by tearing off the area of the primer on the sticker; the test method is convenient to operate, simple in equipment, short in time consumption and high in accuracy, provides a new method for comprehensively evaluating the performance of the primer, and has important research significance.
Description
Technical Field
The invention belongs to the technical field of paint testing, and particularly relates to a method for testing anti-shedding performance of a primer.
Background
In recent years, architectural coatings have been used in a large number of applications in the field of exterior wall decoration, wherein primers for supporting sand-like coatings have also been used in a large number of applications. Due to the strength of the putty of the base layer, the sand textured coating is easy to peel and fall off in the application process, and particularly has obvious peeling phenomenon in a coating system of a brick-imitating process. The special primer for the sand textured coating mainly has the effects of reinforcing a base layer and balancing the color of the base layer, and the use of the primer can relieve the problem of peeling of a coating caused by insufficient putty strength in a brick imitating process to a certain extent.
The adhesion performance test of the existing primer is tested according to a JG/T9286 method specified in GB/T210-2007 standard, the test needs to brush the primer on a cement flat plate, the adhesive force is tested by cutting grids after 7 days of maintenance, the measured adhesive force has large deviation with the actual, the primer is usually constructed on a putty layer in the actual application, and meanwhile, a construction base material can generate influence on the adhesive force of the primer due to certain alkalis, water in the environment and the like, so that the method conforming to the actual application is more accurate to be used for testing the adhesive force of the primer.
CN105486631A discloses a method for testing adhesion of primer, comprising the following steps: the method comprises the following steps: and (3) batch putty coating: scraping 2-3 putty layers on the wall surface or the test plate in batch; step two: coating a primer to be tested: coating a primer to be detected on the wall surface or the test board; step three: and (4) testing normal adhesion: marking a plurality of lattices on the surface of the primer to be tested, calculating the falling rate of the primer to be tested in the lattices at the moment, and evaluating the adhesive force rating of the primer to be tested in a normal adhesive force test; and (3) testing alkali-resistant adhesive force: using 1-3% calcium hydroxide solution to wash and spray the wall surface or the surface of the test board, calculating the falling rate of the primer to be tested in the grid, and evaluating the adhesive force rating of the primer to be tested in the alkali-resistant adhesive force test; step four: and (4) evaluating the results: and evaluating the adhesion performance of the primer to be tested by the evaluated adhesion rating. The invention can more accurately reflect the adhesion of the primer in practical application, so that the test result is more in line with the practical application. CN105334312A discloses a method for rapidly evaluating the performance of a primer, which comprises the following steps: respectively brushing test primer on the surfaces of the asbestos cement board and the fiber reinforced cement medium-density flat plate, carrying out water permeability test, adhesive force test, saltpetering resistance test and salting-out resistance test on the asbestos cement board and the fiber reinforced cement medium-density flat plate, and if the water permeability, the adhesive force, the saltpetering resistance of the inner wall primer or the saltpetering resistance and the salting-out resistance of the outer wall primer are qualified, judging that the evaluation is qualified; if the water permeability, the adhesive force, the alkali resistance of the inner wall primer or the alkali resistance and the salting-out resistance of the outer wall primer are unqualified, the evaluation is unqualified. CN105527217A discloses a test method for the performance of an external finish paint, in particular to a test method for the weather resistance of the external finish paint. The invention comprises the following steps: the method comprises the following steps: scraping a putty layer: scraping a putty layer on each test plate in batch; step two: coating a primer: coating a primer matched with the finish paint to be detected on the putty layer of each test board; step three: coating finish paint to be detected: coating finish paint to be detected on the primer of each test plate; step four: and (3) exposure testing: placing one test plate in an indoor shade place as a blank contrast, and placing the other test plates on an insolation field for a long time to carry out an insolation test; step five: recording data: testing color difference data, testing gloss data and evaluating chalking grade in the time period of the exposure test of each test plate; step six: and repeating the step five, and carrying out at least 7 times of observation and recording.
The existing sand textured coating system is sequentially applied with a base layer, a putty layer, a primer layer, a finish paint layer and a finishing paint layer from bottom to top. The surface paint layer can be a sand wall-shaped paint layer related to a brick-imitating process, in the existing brick-imitating process, transverse and longitudinal grains are pasted in a tape pasting mode to manufacture a brick-imitating lattice model, and if the tape tearing resistance of the primer is poor under the process construction, the coating is easy to peel and fall off, so that the brick-imitating effect and the firmness of the coating are seriously influenced. Therefore, the evaluation of the anti-peeling property of the primer is very important, and the evaluation method of the anti-peeling property between the primer and the putty layer in the above patent or standard is time-consuming and the accuracy of the result is uncertain.
Therefore, the primer anti-falling testing method which is convenient to operate, simple in equipment, short in time consumption and high in accuracy of testing results is developed, and has important use value.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for testing the anti-falling performance of a primer, which comprises the steps of sequentially coating putty and the primer on a bottom plate, drying, then pasting a sticker on the bottom plate coated with the primer, spraying finish paint after pressurization, tearing off the sticker, and finally obtaining a test result of the anti-falling performance of the primer through the area of the primer on the bottom plate; the test method has the advantages of convenience in operation, simple equipment, short time consumption and high accuracy, provides a new method for comprehensively evaluating the performance of the primer, and has important research significance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for testing the anti-shedding performance of a primer, which comprises the following steps:
(1) sequentially coating putty on the bottom plate, and drying to obtain a first substrate;
(2) coating a primer on the putty coating of the first substrate obtained in the step (1), and drying to obtain a second substrate;
(3) sticking a sticker on the surface of the second substrate with the primer coating obtained in the step (1), and pressurizing to obtain a third substrate;
(4) and (4) coating finish paint on the surface of the third substrate with the paster, which is obtained in the step (3), drying and tearing off the paster, and obtaining the anti-falling test result of the primer through tearing off the area of the primer on the paster.
The invention provides a method for testing the anti-falling performance of a primer, which comprises the steps of firstly coating putty and the primer on a base plate in sequence, pasting a sticker on the base plate with the primer coating after drying, then applying pressure, coating finish paint on the base plate with the sticker obtained after pressurization, and tearing off the sticker after drying; finally, the test result of the anti-falling performance of the primer is obtained by observing the area of the primer on the third substrate, and the test method has the advantages of simple and convenient steps, high test speed and suitability for operation in various environments; on the other hand, the test conditions of the test method simulate the actual application situation of the primer, the test result is accurate, and the application range is wide.
In the test method provided by the invention, the area D of the primer on the torn sticker is less than or equal to 1% of the area S when the sticker is adhered to a third substrate, which represents that the anti-shedding performance of the primer is qualified; the smaller the area of the primer on the torn-off sticker is, the stronger the anti-falling performance of the primer is.
The paster can select 3M crepe paper.
Preferably, step (1) further comprises the step of coating mortar on the bottom plate before the putty is coated.
According to the primer anti-falling test method provided by the invention, the mortar is coated on the floor before the putty is coated on the bottom plate, so that the actual condition can be simulated more favorably, and the accuracy of the test result is higher.
Preferably, the coating amount of the mortar on the bottom plate is 1-3 kg/m2For example 1.2kg/m2、1.4kg/m2、1.6kg/m2、1.8kg/m2、2kg/m2、2.2kg/m2、2.4kg/m2、2.6kg/m2Or 2.8kg/m2And the specific values between the foregoing, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
Preferably, the coating amount of the putty in the step (1) on the bottom plate is 1-3 kg/m2For example 1.2kg/m2、1.4kg/m2、1.6kg/m2、1.8kg/m2、2kg/m2、2.2kg/m2、2.4kg/m2、2.6kg/m2Or 2.8kg/m2And the specific values between the foregoing, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
Preferably, the coating amount of the primer in the step (1) on the first substrate is 0.1-0.2 kg/m2For example 0.11kg/m2、0.12kg/m2、0.13kg/m2、0.14kg/m2、0.15kg/m2、0.16kg/m2、0.17kg/m2、0.18kg/m2Or 0.19kg/m2And the specific values between the foregoing, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
Preferably, the drying time in step (1) and step (2) is 10-28 h, such as 12h, 14h, 16h, 18h, 20h, 22h, 24h or 26h, and the specific values therebetween are limited by space and for the sake of brevity, the invention is not exhaustive, and preferably the specific values included in the range are 24-28 h.
Preferably, the drying temperature in step (1) and step (2) is 20-30 ℃, such as 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃ or 29 ℃, and the specific values therebetween are not exhaustive, but for brevity and conciseness.
Preferably, the width of the sticker of step (3) is 10-20 mm, such as 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm or 19mm, and the specific point values between the above point values, which are limited by space and for the sake of brevity, are not exhaustive.
Preferably, the length of the sticker of step (3) is not less than 20cm, such as 19cm, 18cm, 17cm, 16cm, 15cm, 14cm, 13cm, 12cm, 11cm, 10cm, 9cm, 8cm, 7cm, 6cm, 5cm, 4cm, 3cm or 2cm, and the specific point values between the above point values, are not exhaustive and for the sake of brevity.
Preferably, the pressurizing of step (3) is performed by a foam roller.
Preferably, the pressurization pressure is 500 to 1000Pa, such as 550Pa, 600Pa, 650Pa, 700Pa, 750Pa, 800Pa, 850Pa or 900Pa, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not intended to be exhaustive of the specific values included in the ranges.
Preferably, the coating amount of the finish paint in the step (4) on the third substrate is 1.5-2 kg/m2For example 1.55kg/m2、1.6kg/m2、1.65kg/m2、1.7kg/m2、1.75kg/m2、1.8kg/m2、1.85kg/m2、1.9kg/m2Or 1.95kg/m2And the specific values between the foregoing, are not intended to be exhaustive or to limit the invention to the precise values encompassed within the scope, for reasons of brevity and clarity.
Preferably, the drying time in step (4) is 0.5-12 h, such as 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h or 11h, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive list of the specific values included in the range.
Preferably, the drying temperature in step (4) is 20-30 ℃, for example, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃ or 29 ℃, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive of the specific values included in the range.
Preferably, the angle between the sticker and the second substrate during the removal of the sticker in step (4) is 120-150 °, such as 123 °, 126 °, 129 °, 132 °, 135 °, 138 °, 142 °, 145 ° or 148 °, and specific point values therebetween, which are limited by space and for brevity, are not exhaustive.
As a preferred technical scheme, in the primer anti-falling test method provided by the invention, when the sticker is torn off, the angle of the sticker and the angle of the base plate are 120-150 degrees, so that the test result is more accurate, and the graduation of different primer time zones is larger when the primer is tested.
Preferably, the tearing speed of the tear-off sticker of the step (4) is 300-350 mm/min, such as 305mm/min, 310mm/min, 315mm/min, 320mm/min, 325mm/min, 330mm/min, 335mm/min, 340mm/min or 345mm/min, and the specific point values between the above point values are limited by space and for the sake of brevity, the invention is not exhaustive of the specific point values included in the range.
As a preferred technical scheme, the testing method comprises the following steps:
(1) coating putty on a bottom plate according to the coating amount of 1-3 kg/square meter, and drying at the temperature of 20-30 ℃ for 10-28 hours to obtain a first substrate;
(2) 0.1-0.2 kg/m of putty coating of the first substrate obtained in the step (1)2Coating the primer on the coating amount of the first substrate, and drying to obtain a second substrate;
(3) sticking a sticker with the length of not less than 20cm and the width of 10-20 mm on the surface of the second substrate with the primer coating obtained in the step (2), and applying pressure of 500-1000 Pa to obtain a third substrate;
(4) 1.5-2 kg/m of finish paint2The coating amount is coated on the surface of the third substrate with the paster, which is obtained in the step (3), the paster is torn off at the angle of 120-150 degrees according to the tearing speed of 300-350 mm/min and the angle between the paster and the third substrate for 0.5-12 h after drying at 20-30 ℃, and the anti-falling test result of the primer is obtained through the area of the primer on the torn paster.
Compared with the prior art, the invention has the following beneficial effects:
according to the method for testing the anti-falling performance of the primer, the putty and the primer are sequentially coated on the bottom plate, the actual application condition of the primer is simulated, the sticker is pasted on the surface of the primer after drying, the surface of the iron is coated with the finish after pressurization, the sticker is torn off after drying, and finally the anti-falling performance test result of the primer is obtained through the area of the primer on the torn sticker; the test method is simple, rapid and convenient to operate, simulates the actual application condition of the primer, so that the obtained test result is accurate, the graduation of the anti-falling areas of different primers is high, and compared with the test method for testing the anti-falling performance of the primer in the prior art, the test method greatly shortens the test time of the anti-whiskering performance of the primer, has the advantages of convenience in operation, simple equipment and high accuracy, and is suitable for being applied in various scenes.
Drawings
FIG. 1 is a photograph of a third substrate after removal of the decal using the test method provided in example 1, wherein 1-the location of the tape removal;
FIG. 2 is a photograph of a third substrate after removal of the decal using the test method provided in example 2, wherein 1-the location of the tape removal;
FIG. 3 is a photograph of a third substrate after removal of the decal using the test method provided in example 3, wherein 1-the location of the tape removal;
FIG. 4 is a photograph of a third substrate after removal of the decal using the test method provided in example 4, wherein 1-the location of the tape removal.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A test method for anti-shedding performance of a primer specifically comprises the following steps:
(1) on a base plate (calcium silicate plate) according to 2kg/m2Coating putty (Fuste GS980 putty) at the coating amount of (1), and drying at 25 ℃ for 24 hours to obtain a first substrate;
(2) 0.15kg/m of putty coating of the first substrate obtained in the step (1)2Coating primer (Fuste sand-containing primer T500-3) in the coating amount, and drying for 24 hours at 25 ℃ to obtain a second substrate;
(3) pasting a sticker (3M adhesive tape) with the length of 20cm and the width of 1.5cm on the surface of the second substrate with the primer coating obtained in the step (2), and applying a pressure of 750Pa to obtain a third substrate;
(4) 1.8kg/m of finish paint (Fustet T217 sand wall texture paint)2The coating amount of (3) is applied on the surface of the third substrate with the paster, the paster is dried for 4 hours at 25 ℃, the paster is torn according to the tearing speed of 300mm/min and the angle between the paster and the third substrate of 150 degrees, and the anti-falling test result of the primer is obtained through the area of the primer on the torn paster.
A picture of the third substrate after the sticker is removed by the test method provided in this embodiment is shown in fig. 1, where 1 represents the position where the adhesive tape is removed, and it can be seen from fig. 1 that the sticker is adhered to the base plate in an area S of 1.5cm × 20cm to 30cm2The base used in this example will be described because the area D of the primer on the peeled seal paper is 0 (the mark where the tape was peeled at the position 1 was not peeled as seen in fig. 1) and D/S is 0The paint has strong shedding resistance.
As can be seen from fig. 1, the torn position of the adhesive tape obtained by the testing method provided by this embodiment has a clear outline, and the ratio of the area of the primer on the torn sticker to the viscosity area of the sticker and the base plate can be clearly calculated, so that the anti-efflorescence strength of the primer can be effectively judged, which indicates that the testing result of the anti-shedding performance of the primer provided by this embodiment is accurate.
Example 2
A test method for anti-shedding performance of a primer specifically comprises the following steps:
(1) coating putty (Fuste GS980 putty) on a bottom plate (calcium silicate plate) according to the coating amount of 2 kg/square meter, and drying for 28h at the temperature of 20 ℃ to obtain a first substrate;
(2) 0.1kg/m of putty coating of the first substrate obtained in the step (1)2Coating the primer (Fuste primer T200) at the coating amount of (2), and drying at 20 ℃ for 28h to obtain a second substrate;
(3) pasting a sticker (3M adhesive tape) with the length of 30cm and the width of 1cm on the surface of the second substrate with the primer coating obtained in the step (2), and applying pressure of 500Pa to obtain a third substrate;
(4) 1.5kg/m of finish paint (Fustet T217 sand wall texture paint)2The coating amount of the primer is coated on the surface of the third substrate with the paster, which is obtained in the step (3), the paster is dried for 10 hours at the temperature of 20 ℃, the paster is torn according to the tearing speed of 350mm/min and the angle between the paster and the third substrate of 120 degrees, and the anti-falling test result of the primer is obtained through the area of the primer on the torn paster.
A picture of the third substrate after the sticker is removed by the test method provided in this embodiment is shown in fig. 2, where 1 represents the position where the adhesive tape is removed, and it can be seen from fig. 2 that the area S where the sticker is adhered to the base plate is 1cm × 30cm or 30cm2The area D of the primer on the peeled sticker, 1.4 (obtained from the light colored area on position 1 where the tape was observed to be peeled off in FIG. 2), and D/S0.046 > 1%, thus illustrating that the primer used in this example is not very good in peel resistance.
As can be seen from fig. 2, the torn position of the adhesive tape obtained by the testing method provided by the embodiment has a clear outline, and the ratio of the area of the primer on the torn sticker to the viscosity area of the sticker and the base plate can be clearly calculated, so that the anti-efflorescence strength of the primer can be effectively judged, which indicates that the testing result of the anti-shedding performance of the primer provided by the embodiment is accurate.
Example 3
A test method for anti-shedding performance of a primer specifically comprises the following steps:
(1) coating putty (Fuste GS980 putty) on a bottom plate (a commercially available calcium silicate plate) according to the coating quantity of 2 kg/square meter, and drying at 30 ℃ for 10 hours to obtain a first substrate;
(2) 0.1kg/m of putty coating of the first substrate obtained in the step (1)2Coating primer (Fuste primer E200) at the coating amount of (1), and drying at 30 ℃ for 10 hours to obtain a second substrate;
(3) pasting a sticker (3M adhesive tape) with the length of 25cm and the width of 2cm on the surface of the second substrate with the primer coating obtained in the step (2), and applying 1000Pa pressure to obtain a third substrate;
(4) the finish paint (Fustet T217 sand wall texture paint) is 2kg/m2The coating amount of (3) is applied on the surface of the third substrate with the sticker obtained in the step (3), the sticker is torn off at the tearing speed of 325mm/min for 5 hours at the tearing speed of 130 degrees from the third substrate, and the anti-falling test result of the primer is obtained through the area of the primer on the torn sticker.
A picture of the third substrate after the sticker is removed by the test method provided in this embodiment is shown in fig. 3, where 1 represents the position where the adhesive tape is removed, and it can be seen from fig. 3 that the area S where the sticker is adhered to the base plate is 2cm × 25cm or 50cm2The area D of the primer on the torn sticker is approximately equal to 3cm2(from the light colored area on position 1 where the tape was observed to be torn off in FIG. 3), D/S ≈ 0.06 > 1%, thus illustrating that the primer used in this example is inferior in peel resistance.
As can be seen from fig. 3, the torn position of the adhesive tape obtained by the testing method provided by the embodiment has a clear outline, is brightly distinguished, can clearly calculate the ratio of the area of the primer on the torn sticker to the viscosity area of the sticker and the base plate, and can effectively judge the anti-efflorescence strength of the primer, which indicates that the testing result of the anti-shedding performance of the primer provided by the embodiment is accurate.
Example 4
A test method for the anti-peeling property of a primer was conducted, which was different from example 3 only in that the top coat in the step (4) was applied in an amount of 3kg/m2The other components, amounts and procedures were the same as in example 1.
A picture of the third substrate after the sticker was removed by the test method provided in this example is shown in fig. 4, where 1 represents the position where the adhesive tape was removed, and since the coating amount of the topcoat was too high, it can be seen from fig. 4 that the sticker was adhered to the base plate in an area S of 2cm × 25cm to 50cm2The area D of the primer on the torn off sticker is 35cm2(the trace of the removal of the primer was observed at the position 1 where the tape was removed in FIG. 4), D/S was 0.7 > 1%, thus showing that the primer used in this example had poor peel resistance.
As can be seen from fig. 4, the test method provided in this example results in a less sharp outline of the location where the tape is torn off, because the amount of finish coating is too great, which results in increased film strength and cohesion, and therefore greater destructive power, resulting in less accurate calculation of the ratio of the area of primer on the torn-off sticker to the area of viscosity of the sticker to the base sheet.
Comparative example 1
A method for testing the anti-shedding performance of a primer is tested according to a method JG/T9286 specified in GB/T210-2007 standard.
On one hand, the testing method provided by the comparative example has the advantages that the testing period is too long, the deviation between the testing result and the actual result is large, the primer is usually constructed on the putty layer in the actual application, and meanwhile, certain alkaline matters, water in the environment and the like can affect the adhesive force of the primer on the construction base material.
Therefore, the test methods provided by the comparative examples 1 to 4 and the comparative example 1 can find that the test method provided by the invention is convenient to operate and short in time; on the other hand, the actual situation of the primer in application is simulated, and the test result is more accurate, so that the test method provided by the invention is more suitable for being used in the industrial production process.
The applicant states that the present invention is illustrated by the above examples as a method for testing the peel resistance of a primer, but the present invention is not limited to the above process steps, i.e., it is not meant that the present invention must rely on the above process steps to be practiced. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. A method for testing the anti-shedding performance of a primer is characterized by comprising the following steps:
(1) coating putty on the bottom plate, and drying to obtain a first substrate;
(2) coating a primer on the putty coating of the first substrate obtained in the step (1), and drying to obtain a second substrate;
(3) sticking a sticker on the surface of the second substrate with the primer coating obtained in the step (2), and pressurizing to obtain a third substrate;
(4) and (4) coating finish paint on the surface of the third substrate with the paster, which is obtained in the step (3), drying and tearing off the paster, and obtaining the anti-falling test result of the primer through tearing off the area of the primer on the paster.
2. The test method of claim 1, wherein step (1) further comprises the step of applying mortar to the base plate before applying the mastic;
preferably, the coating amount of the mortar on the bottom plate is 1-3 kg/m2。
3. The test method as claimed in claim 1 or 2, wherein the putty of the step (1) is applied to the base plate in an amount of 1 to 3kg/m2；
Preferably, the coating amount of the primer in the step (2) on the first substrate is 0.1-0.2 kg/m2。
4. The test method according to any one of claims 1 to 3, wherein the drying time in step (1) and step (2) is 10 to 28 hours, preferably 24 to 28 hours;
preferably, the drying temperature of the step (1) and the drying temperature of the step (2) are respectively and independently 20-30 ℃.
5. The test method according to any one of claims 1 to 4, wherein the width of the sticker of step (3) is 10 to 20 mm;
preferably, the length of the paster in the step (3) is not less than 20 cm.
6. The test method according to any one of claims 1 to 5, wherein the pressurization of step (3) is performed by a foam roller;
preferably, the pressure for pressurization is 500 to 1000 Pa.
7. The test method according to any one of claims 1 to 6, wherein the coating amount of the topcoat on the third substrate in the step (4) is 1.5 to 2kg/m2。
8. The test method according to any one of claims 1 to 7, wherein the drying time in the step (4) is 0.5 to 12 hours;
preferably, the drying temperature in the step (4) is 20-30 ℃.
9. The test method according to any one of claims 1 to 8, wherein the angle between the sticker and the second substrate in the process of peeling off the sticker in the step (4) is 120 to 150 °;
preferably, the tearing speed of the tearing sticker in the step (4) is 300-350 mm/min.
10. The test method according to any one of claims 1 to 9, characterized in that it comprises the steps of:
(1) 1-3 kg/m on the bottom plate2Coating putty on the coating amount, and drying at the temperature of 20-30 ℃ for 10-28 h to obtain a first substrate;
(2) 0.1-0.2 kg/m of putty coating of the first substrate obtained in the step (1)2Coating the primer on the coating amount of the first substrate, and drying to obtain a second substrate;
(3) sticking a sticker with the length of not less than 20cm and the width of 10-20 mm on the surface of the second substrate with the primer coating obtained in the step (2), and applying pressure of 500-1000 Pa to obtain a third substrate;
(4) 1.5-2 kg/m of finish paint2The coating amount is coated on the surface of the third substrate with the paster, which is obtained in the step (3), the paster is torn off at the angle of 120-150 degrees according to the tearing speed of 300-350 mm/min and the angle between the paster and the third substrate for 0.5-12 h after drying at 20-30 ℃, and the anti-falling test result of the primer is obtained by tearing off the area of the primer on the paster.
Priority Applications (1)
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| CN110272674A (en) * | 2019-05-16 | 2019-09-24 | Ppg涂料(天津)有限公司 | One-component paint base composition |
| CN110724456A (en) * | 2019-10-31 | 2020-01-24 | 阳泉市澳丽丝科技涂料有限公司 | High-strength alkali-resistant true stone paint with same-color primer and preparation method thereof |
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| US5496647A (en) * | 1992-05-15 | 1996-03-05 | Hoechst Celanese Corporation | Primer coating, polyester film having a primer coating, and a process for coating film |
| EP1666554A1 (en) * | 2004-12-04 | 2006-06-07 | Tesa AG | Security tape to reveal unauthorized opening of packaging |
| CN103889717A (en) * | 2011-10-21 | 2014-06-25 | Lg化学株式会社 | Multi-layered film and method for preparing the same |
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| CN105334312A (en) * | 2015-10-16 | 2016-02-17 | 三棵树涂料股份有限公司 | Method used for rapid evaluation of priming paint performance |
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