CN102207437A - Device for testing elastic coating and test method thereof - Google Patents
Device for testing elastic coating and test method thereof Download PDFInfo
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- CN102207437A CN102207437A CN2011100521166A CN201110052116A CN102207437A CN 102207437 A CN102207437 A CN 102207437A CN 2011100521166 A CN2011100521166 A CN 2011100521166A CN 201110052116 A CN201110052116 A CN 201110052116A CN 102207437 A CN102207437 A CN 102207437A
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Abstract
The invention provides a method for testing an elastic coating, which comprises the following steps of: preparing a coating film of the elastic coating; determining the theoretical elastic life of the coating film by means of cyclic tensile test; subjecting the coating film to artificial aging to obtain the artificially aged coating film; and determining the actual elastic life of the artificially aged coating film by means of cyclic tensile test so as to obtain the elastic properties of the elastic coating. The invention further provides a corresponding device. The method and the device provided by the invention can rapidly and effectually determine the elastic effect and life of the elastic coating after practical application.
Description
Technical field
The present invention relates to a kind of determinator and method thereof of coating, relate more specifically to a kind of determinator and method thereof of elastic coating, more specifically comprise elastic extension ability, tensile strength and the device and method in elasticity life-span of measuring anti-cracking elastic coating.
Background technology
Various on market at present to be used for anti-cracking elasticity ornament materials more and more, and especially the development of elastic coating is more and more faster, and the continuous release of a large amount of mid-to high-end products and functional product makes the function of coating products abundant day by day.The relevant criterion of elastic coating also is gradually improved.But the elasticity of elastic coating and the ability that covers the crack do not have good detection method to give correspondence, existing coherent detection standard, elastic effect and life-span after the actual application of reflection Resilient product that can not be authentic and valid all the time.
Therefore, this area presses for a kind of flexible and frequency (inferior) of effective simulation cracking basic crack, testing elastic extends ability, tensile strength and elasticity life-span, can judge the elastic effect of elastic coating after actual application and the device and related methods and the standard in life-span fast and effectively.
Summary of the invention
First purpose of the present invention is to provide a kind of flexible and frequency (inferior) of effective simulation cracking basic crack, testing elastic extends ability, tensile strength and elasticity life-span, can judge elastic effect and method of life or the standard of elastic coating after actual application fast and effectively.
Second purpose of the present invention is to provide a kind of flexible and frequency (inferior) of effective simulation cracking basic crack, testing elastic extends ability, tensile strength and elasticity life-span, can judge the elastic effect of elastic coating after actual application and the device in life-span fast and effectively.
First aspect present invention provides a kind of method of testing of elastic coating, and described method comprises the steps: to prepare filming of elastic coating;
Measure the described theoretical elasticity life-span of filming by the stretching cyclic test;
Described filming carried out artificial ageing and handled, obtain filming after the artificial ageing;
Measure actual elastic life-span of filming after the described artificial ageing by the stretching cyclic test, thereby record the elastic performance of described elastic coating.
In a preference, measure described theoretical elasticity of filming outside the life-span, also measure elastic extension ability or tensile strength by the stretching cyclic test.
In a specific embodiment of the present invention, described build of filming is 70-80 μ m.
In a specific embodiment of the present invention, in the described stretching cyclic test, stretching distance is 0.1mm～0.2mm.
In a specific embodiment of the present invention, described filming carried out the artificial ageing processing according to the method for regulation among the GB/T 1865.
In a specific embodiment of the present invention, described theoretical elasticity life-span S calculates according to following formula:
S＝C/E
Wherein,
S---the theoretical elasticity life-span (year);
C---the elastic coating cycle index (inferior) when being broken of filming
E---empirical constant (inferior/year).
In a specific embodiment of the present invention, described actual elastic life-span S ' calculates according to following formula:
S’＝C’/E；
Wherein,
S '---the elasticity life-span (year) after the artificial ageing
C '---the elastic coating cycle index (inferior) when being broken of filming after the artificial ageing
E---empirical constant (inferior/year).
In a specific embodiment of the present invention, described elastic performance characterizes by elasticity life-span rate T, and described elasticity life-span rate T is calculated as follows:
T＝S’/S×100％。
In a preference, the T value is high more, shows that the actual elastic life-span of sample is good more.
A second aspect of the present invention provides a kind of proving installation of elastic coating, and described device comprises:
The preparing instrument of filming of the test sample plate that the preparation elastic coating is filmed;
The artificial ageing instrument; And
Measure the elasticity tester in described theoretical elasticity life-span of filming and actual elastic life-span by the stretching cyclic test.
In a specific embodiment of the present invention, described artificial ageing instrument is the artificial weathering instrument that meets GB/T 1865 regulations.
In a specific embodiment of the present invention, described elasticity tester comprises:
The stationary installation of fixing described test sample plate;
The flexible stretching panel that described test sample plate is stretched and stretched;
Control panel; Described control panel comprises stretching distance controller, pulling force sensor and cycle counter.
Description of drawings
Fig. 1 is a proving installation of the present invention, and the number in the figure implication is as follows;
The 1-stretching panel that stretches; The 2-test sample plate; 3-test sample plate stationary installation;
The 4-tensilometer that stretches; The parallel moving direction of 5-;
6-control panel (comprising cycle counter, pulling force sensor, stretching distance controller, power control switch)
Fracture width delta data curve map when Fig. 2 shows the different regions difference temperature difference;
Cracking cycle index correlation data curve map when Fig. 3 shows different thickness;
Fig. 4 shows different arranging scheme cracking cycle index correlation data curve maps; The corresponding from left to right following sample of described data:
Fig. 5 shows aging front and back elasticity capacity correlation data curve map; The corresponding from left to right following sample of described data:
Embodiment
Technical matters to be solved by this invention is the flexible and frequency (inferior) of simulation cracking basic crack, and testing elastic extends ability, tensile strength and elasticity life-span.
Other aspects of the present invention are because the disclosure of this paper is conspicuous to those skilled in the art.
Method of testing
The invention provides a kind of method of testing of elastic coating, described method comprises the steps: to prepare filming of elastic coating;
Measure the described theoretical elasticity life-span of filming by the stretching cyclic test;
Described filming carried out artificial ageing and handled, obtain filming after the artificial ageing;
Measure actual elastic life-span of filming after the described artificial ageing by the stretching cyclic test, thereby record the elastic performance of described elastic coating.
In a specific embodiment of the present invention, described elastic performance characterizes by elasticity life-span rate T, and described elasticity life-span rate T is calculated as follows:
T＝S’/S×100％。
The absolute value of T is high more, shows that the actual elastic life-span of sample is good more.
Also the elasticity life-span rate of different product can be compared, thereby estimate its relative resilient performance.For example, a kind of elasticity life-span rate of product is set at standard value, it is qualified being higher than this standard value, and it is defective being lower than standard value.
In a preference, measure described theoretical elasticity of filming outside the life-span, also measure elastic extension ability or tensile strength by the stretching cyclic test.The mensuration of described elastic extension ability or tensile strength can be according to the mode of prior art; Concrete example as, can be by increasing the method for stretching distance, the elastic effect that fast detecting is filmed.Stretching distance is long more, shows that the elastic effect of filming is good more.
The determination data of described elastic extension ability or tensile strength can be used as the auxiliary data of the elastic performance of judging elastic coating.For example, when the elasticity life-span of two or more products rate near the time (for example difference is no more than 10%, not even above 5% o'clock) can adopt described elastic extension ability or tensile strength that the elastic performance of sample is just passed judgment on.
In a specific embodiment of the present invention, described build of filming is 70-80 μ m.And when actual application, the wet-film thickness that general latex paint construction is 2 times is about 150 μ m, and build is about 70-80 μ m.Therefore, the thickness when preparation must fully take into account actual application when filming is selected suitable thickness in conjunction with actual conditions.
In a specific embodiment of the present invention, in the described stretching cyclic test, stretching distance is 0.1mm～0.2mm.Above-mentioned scope is evaluated according to actual conditions, the time of the temperature difference above 40 ℃ has the time of 1 wheat harvesting period approximately in 1 year, width change is about about 0.1mm at this moment, and the situation of the most extreme temperature difference above 50 ℃ is also few, and the fracture width variation of this moment also is no more than 0.2mm.
Supposing to set stretching distance is 0.1mm, if sample can reach 30-40 circulation after tested, shows that this sample can keep about about 1 year time in the elasticity life-span of this area.Certainly, in different areas, temperature difference situation difference, the actual elasticity life-span is difference to some extent also, need judge according to the actual conditions of location.
The setting of the stretching distance in the method for testing preferably is no more than 0.2mm, otherwise is not inconsistent with actual conditions, and it is representative to cause test result to lack.
Described stretching distance also can be in the scope beyond 0.1mm～0.2mm, can be used for to the greatest extent judging and relative resilient performance between the different coating is not suitable for judging its absolute elastic performance but obtain data this moment.
In a specific embodiment of the present invention, described filming carried out the artificial ageing processing according to the method for regulation among the GB/T 1865.
In a specific embodiment of the present invention, described theoretical elasticity life-span S calculates according to following formula:
S＝C/E
Wherein,
S---the theoretical elasticity life-span (year);
C---the elastic coating cycle index (inferior) when being broken of filming
E---empirical constant (inferior/year).
In a specific embodiment of the present invention, described actual elastic life-span S ' calculates according to following formula:
S’＝C’/E；
Wherein,
S '---the elasticity life-span (year) after the artificial ageing
C '---the elastic coating cycle index (inferior) when being broken of filming after the artificial ageing
E---empirical constant (inferior/year).
Proving installation
The present invention also provides a kind of proving installation of elastic coating, and described device comprises:
The preparing instrument of filming of the test sample plate that the preparation elastic coating is filmed;
The artificial ageing instrument; And
Measure the elasticity tester in described theoretical elasticity life-span of filming and actual elastic life-span by the stretching cyclic test.
In a specific embodiment of the present invention, described artificial ageing instrument is the artificial weathering instrument that meets GB/T 1865 regulations.
In a specific embodiment of the present invention, described elasticity tester comprises:
The stationary installation of fixing described test sample plate;
The flexible stretching panel that described test sample plate is stretched and stretched;
Control panel; Described control panel comprises stretching distance controller, pulling force sensor and cycle counter.
The invention has the advantages that:
The ability that covers basic crack of elastic coating, relevant with the elastic performance and the brushing thickness of coating self.But climatic environment and influence of temperature variation, the expanding with heat and contract with cold of basic unit, the flexible and frequency (inferior) in crack can constantly change.Degraded of filming and the aging elasticity capacity and the life-span that also can have influence on coating.And the present invention has announced a kind of elastic extension ability, tensile strength and elasticity method of life of measuring elastic coating.The present invention is by the flexible and frequency (inferior) of simulation cracking basic crack, and test is used for the ability and the elasticity life-span of anti-cracking elastic coating, for the research and development and the improvement of elastic coating provides relevant technical parameter and foundation.
Below in conjunction with specific embodiment, further illustrate the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.Ratio and number percent are based on weight, unless stated otherwise.
Unless otherwise defined or explanation, same meanings of being familiar with of all specialties used herein and scientific words and those skilled in the art.Any in addition method similar or impartial to described content and material all can be applicable in the inventive method.
Embodiment
Testing apparatus comprises following instrument composition:
(1) preparing instrument of filming: the preparing instrument that comprises various thickness;
(2) artificial ageing instrument: the artificial weathering instrument that meets regulation among the GB/T 1865;
(3) elasticity tester: the supporting proving installation that designs for the present invention, referring to Fig. 1.
The 1-stretching panel that stretches; The 2-test sample plate; 3-test sample plate stationary installation;
The 4-tensilometer that stretches; The parallel moving direction of 5-;
6-control panel (comprising cycle counter, pulling force sensor, stretching distance controller, power control switch)
Method of testing:
1, the processing of model ground: 2 block sizes, thickness, base plate that material is identical are fixed with unit clamp, it is parallel to each other is connected in one;
2, be coated with film preparation: use the preparing instrument brushing of filming of certain thickness in the model front elastic coating;
The coating thickness preparation is according to illustrating: it is 1.0 ± 0.2mm that the build that regulation test is filmed in " JG/T 172-2005 elastic building paint " requires, and when actual application, the wet-film thickness that general latex paint construction is 2 times is about 150 μ m, build is about 70-80 μ m, even construct 10 times, build does not reach the thickness of stipulating in the standard yet.Therefore, the thickness when preparation must fully take into account actual application when filming is selected suitable thickness in conjunction with actual conditions.
3, model maintenance: the environment of the model for preparing being put into appointment carries out maintenance;
4, artificial ageing:, according to the method for regulation among the GB/T 1865 sample is carried out artificial ageing and handle according to the test needs;
5, elastomeric check:
5.1 the model that maintenance is finished is installed to elastic coating proving installation surface, removes the mold clamp tool, notes guaranteeing paint film excellent (if accidentally paint film is done to split, reinstalling test behind the model that need more renew);
5.2 set each stretching distance;
The foundation explanation of stretching distance:
The extensibility of elasticity interiro wall latex paint will reach 150% under " JG/T 172-2005 elastic building paint " middle required standard state, and the elastic outer wall latex paint requires to reach 200% especially.In test process, filming is to break away from ground, carries out extension test separately.And in actual conditions, the stretching of filming is to carry out synchronously in conjunction with expanding with heat and contract with cold of ground crack, and it is unscientific therefore assessing both separately, must combine and assess.In addition, expanding with heat and contract with cold of any ground crack also can not reach 150%, in order to work out the stretching distance of a science, is necessary the situation of change to the ground crack, carries out trace analysis.
Therefore, we are in different cities, choose fracture width respectively and be the crack between the 0.3-0.5mm, have carried out reaching the track record of time for many years, and the result is as follows:
Measured data are seen Fig. 2.
By above chart, we can be clearly seen that, expanding with heat and contract with cold of fracture width is little with residing ground cell relation, but with the temperature difference substantial connection are arranged, and the temperature difference is big more, and fracture width changes also more greatly.
For this reason, we have further observed the temperature difference situation of different regions, and we find, when the thermal extremes sky, the minimum temperature of outdoor surface of bottom material and can reach about 75 ℃ when the highest about 25 ℃, and the temperature difference is up to more than 50 ℃.Through track record for many years, the result is as follows:
By above chart, we can see that the time of the temperature difference above 40 ℃ has the time of 1 wheat harvesting period approximately in 1 year, and this moment, width change was about about 0.1mm, the situation of the most extreme temperature difference above 50 ℃ is also few, and the fracture width variation of this moment also is no more than 0.2mm.
Supposing to set stretching distance is 0.1mm, if sample can reach 30-40 circulation after tested, shows that this sample can keep about about 1 year time in the elasticity life-span of this area.Certainly, in different areas, temperature difference situation difference, the actual elasticity life-span is difference to some extent also, need judge according to the actual conditions of location.
To sum up: the setting of the stretching distance in the method for testing, should not surpass 0.2mm, otherwise not be inconsistent with actual conditions, it is representative to cause test result to lack.
6, opening device, circulation experiment stretches;
7, record covers the cycle index that the elastic coating on model surface is broken, simultaneously the each acting force situation that stretches of record;
Applicating example one: the flexible test of latex paint
1, prepare ground, clean out, standby;
2, the preparing instrument with different thickness prepares the elastic coating sample respectively, at least 10 of every kind of each making sheet of thickness;
3, maintenance 7 days under 23 ℃ ± 2 ℃, 50% ± 5% condition
4, the model that maintenance is finished is installed to elastic coating proving installation surface, notes guaranteeing paint film excellent (if accidentally paint film is done to split, reinstalling test behind the model that need more renew);
5, setting stretching distance is 0.1 ± 0.01mm;
6, opening device, circulation experiment stretches;
7, record covers the cycle index that the elastic coating of model fracture faces is broken, simultaneously the each acting force situation that stretches of record;
Test result is as follows:
Resulting data are shown in Fig. 3.By above chart, we can see that sample D does not have elasticity fully, no matter how many thickness is, as long as ground has slight stretching, films and will ftracture; Sample C neither be qualified Resilient product, only have slight pliability, run into the ground telescopic variation, also be easy to the cracking; Sample B possesses certain elasticity, has the flexible ability of certain opposing ground, even but be brushed to about 3 times (the about 200 μ m of dry film) of normal thickness, cracking also can appear in the short time; And sample A possesses better elastic, under the situation that still normal brushing is 2 times, also can occur cracking in the short time, and necessary increase thickness just can be resisted the trickle cracking that expands with heat and contract with cold and cause because of ground to more than 3 times of normal thickness.
According to above conclusion, we can find, even the best coating of elasticity also can't well be resisted the cracking of ground, therefore, it is unpractical depending the cracking problem that coating solves ground alone, must handle the crack in conjunction with multiple material.
Applicating example two: the test after the multiple resilient material stack
On identical model, use different resilient material arranging schemes to handle respectively after, brushing elastic coating sample A again, according to testing after the identical method making sheet maintenance, the result is as follows:
Described data are shown in Fig. 4 by above chart, and we can see, as long as according to actual conditions, select rational arranging scheme for use, and the elasticity life-span can effectively be kept 3-5 or even longer time.
Applicating example three: the test after the artificial ageing
After for example method prepares model and maintenance in two, all model unifications were carried out artificial ageing after 600 hours, carry out flexibility test again, the result is as follows:
Described data are shown in as 5.By above chart, we can see that sample A possesses excellent weather resisteant energy, and through after the artificial ageing, the elasticity life-span of product does not significantly decrease, and is more satisfactory Resilient product.
Show by above test, utilize this method elastic extension ability, tensile strength and the elasticity life-span of judgement sample fast and effectively, for the research and development and the improvement of Resilient product provides more scientific basis.
The above only is preferred embodiment of the present invention, be not in order to limit essence technology contents scope of the present invention, essence technology contents of the present invention is broadly to be defined in the claim scope of application, any technology entity or method that other people finish, if it is defined identical with the claim scope of application, also or a kind of change of equivalence, all will be regarded as being covered by among this claim scope.
All quote in this application as a reference at all documents that the present invention mentions, just quoted as a reference separately as each piece document.Should be understood that in addition after having read foregoing of the present invention, those skilled in the art can make various changes or modifications the present invention, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (10)
1. the method for testing of an elastic coating is characterized in that, described method comprises the steps: to prepare filming of elastic coating;
Measure the described theoretical elasticity life-span of filming by the stretching cyclic test;
Described filming carried out artificial ageing and handled, obtain filming after the artificial ageing;
Measure actual elastic life-span of filming after the described artificial ageing by the stretching cyclic test, thereby record the elastic performance of described elastic coating.
2. the method for claim 1 is characterized in that, described build of filming is 70-80 μ m.
3. the method for claim 1 is characterized in that, in the described stretching cyclic test, stretching distance is 0.1mm～0.2mm.
4. the method for claim 1 is characterized in that, according to the method for regulation among the GB/T 1865 described filming is carried out the artificial ageing processing.
5. the method for claim 1 is characterized in that, described theoretical elasticity life-span S calculates according to following formula:
S＝C/E
Wherein,
S---the theoretical elasticity life-span (year);
C---the elastic coating cycle index (inferior) when being broken of filming
E---empirical constant (inferior/year).
6. method as claimed in claim 5 is characterized in that, described actual elastic life-span S ' calculates according to following formula:
S’＝C’/E；
Wherein,
S '---the elasticity life-span (year) after the artificial ageing
C '---the elastic coating cycle index (inferior) when being broken of filming after the artificial ageing
E---empirical constant (inferior/year).
7. method as claimed in claim 6 is characterized in that, described elastic performance characterizes by elasticity life-span rate T, and described elasticity life-span rate T is calculated as follows:
T＝S’/S×100％。
8. the proving installation of an elastic coating is characterized in that, described device comprises:
The preparing instrument of filming of the test sample plate that the preparation elastic coating is filmed;
The artificial ageing instrument; And
Measure the elasticity tester in described theoretical elasticity life-span of filming and actual elastic life-span by the stretching cyclic test.
9. device as claimed in claim 8 is characterized in that, described artificial ageing instrument is the artificial weathering instrument that meets GB/T 1865 regulations.
10. device as claimed in claim 8 is characterized in that, described elasticity tester comprises:
The stationary installation of fixing described test sample plate;
The flexible stretching panel that described test sample plate is stretched and stretched;
Control panel; Described control panel comprises stretching distance controller, pulling force sensor and cycle counter.
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| CN102607968A (en) * | 2012-03-08 | 2012-07-25 | 上海天补建筑科技有限公司 | Method for measuring crack resistance of composite coating coated on outer wall |
| CN103969180A (en) * | 2013-02-05 | 2014-08-06 | 中国建筑科学研究院 | Method for testing adhesive property of silicone structure sealant for existing curtain wall |
| CN105203404A (en) * | 2015-09-18 | 2015-12-30 | 宁夏共享集团股份有限公司 | Method for measuring strength of evaporative pattern casting paint for casting |
| CN107328676A (en) * | 2017-06-30 | 2017-11-07 | 立邦涂料（中国）有限公司 | It is anti-soft to hinder performance test methods |
| CN111272514A (en) * | 2020-03-25 | 2020-06-12 | 龙泉市亿龙竹木开发有限公司 | Production process and processing equipment of fireproof bamboo board |
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| CN101960284A (en) * | 2008-02-25 | 2011-01-26 | 斯奈克玛 | Device for testing the coating of a vane base |
| CN202041427U (en) * | 2011-03-04 | 2011-11-16 | 立邦涂料（中国）有限公司 | Elastic paint testing device |
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| WO2007064335A1 (en) * | 2005-12-02 | 2007-06-07 | United Technologies Corporation | Systems and methods for modeling surface properties of a mechanical component |
| CN101960284A (en) * | 2008-02-25 | 2011-01-26 | 斯奈克玛 | Device for testing the coating of a vane base |
| CN202041427U (en) * | 2011-03-04 | 2011-11-16 | 立邦涂料（中国）有限公司 | Elastic paint testing device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607968A (en) * | 2012-03-08 | 2012-07-25 | 上海天补建筑科技有限公司 | Method for measuring crack resistance of composite coating coated on outer wall |
| CN103969180A (en) * | 2013-02-05 | 2014-08-06 | 中国建筑科学研究院 | Method for testing adhesive property of silicone structure sealant for existing curtain wall |
| CN103969180B (en) * | 2013-02-05 | 2016-08-03 | 中国建筑科学研究院 | Method for testing adhesive property of silicone structure sealant for existing curtain wall |
| CN105203404A (en) * | 2015-09-18 | 2015-12-30 | 宁夏共享集团股份有限公司 | Method for measuring strength of evaporative pattern casting paint for casting |
| CN107328676A (en) * | 2017-06-30 | 2017-11-07 | 立邦涂料（中国）有限公司 | It is anti-soft to hinder performance test methods |
| CN107328676B (en) * | 2017-06-30 | 2020-06-02 | 立邦涂料（中国）有限公司 | Soft damage resistance testing method |
| CN111272514A (en) * | 2020-03-25 | 2020-06-12 | 龙泉市亿龙竹木开发有限公司 | Production process and processing equipment of fireproof bamboo board |
| CN111272514B (en) * | 2020-03-25 | 2022-11-22 | 龙泉市亿龙竹木开发有限公司 | Production method and processing equipment of fireproof bamboo board |
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