GB/T 37362.1-2019 English PDF (GB/T37362.1-2019)

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GB/T 37362.1-2019: Paints and varnishes -- Drying tests -- Part 1: Determination of through-dry state and through-dry time
GB/T 37362.1-2019
ICS87.040
G50
National Standards of People's Republic of China
GB/T 37362.1-2019
Paints and varnishes - Drying test - Part 1.
Determination of complete dryness and complete drying time
Paintsandvarnishes-Dryingtests-Part 1.Determinationof
(ISO 9117-1.2009, MOD)
Published on.2019-03-25
2020-02-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 37362 "Color paint and varnish drying test" is divided into six parts.
--- Part 1. Determination of complete dry state and complete drying time;
--- Part 2. Resistance to sputum test;
--- Part 3. Coating surface drying test small glass ball method;
--- Part 4. Using the recorder method;
--- Part 5. Improved Bando-Wolf test method;
--- Part 6. No print test.
This part is the first part of GB/T 37362.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This section uses the redrafting method to modify the use of ISO 9117-1.2009 "Painting and varnish drying test Part 1. Completely dry
Determination of state and complete drying time.
There are technical differences in this section compared to ISO 9117-1.2009, and the terms involved in these differences have been passed on the outside margins.
The vertical single line (│) of the position is marked, and a list of the corresponding technical differences and their causes is given in Appendix A.
This section has made the following editorial changes.
--- Increase the informative Appendix A.
This part was proposed by the China Petroleum and Chemical Industry Federation.
This part is under the jurisdiction of the National Coatings and Pigments Standardization Technical Committee (SAC/TC5).
This section was drafted. Jiangsu Lanling Polymer Materials Co., Ltd., Changzhou Guanghui New Materials Research Institute Co., Ltd., Anhui Linghu Paint Co., Ltd.
Co., Ltd., CNOOC Changzhou Coating Chemical Research Institute Co., Ltd., AVIC Baimu New Material Technology Engineering Co., Ltd., Dongguan
Feng Building Materials Technology Co., Ltd., Zhongche Tangshan Locomotive and Rolling Stock Co., Ltd., Standard Geda Precision Instrument (Guangzhou) Co., Ltd., Yellow River Delta Jingbo
Chemical Research Institute Co., Ltd., Shenzhen Guangtian Environmental Protection Coating Co., Ltd., Hebei Chenyang Industry and Trade Group Co., Ltd., Zhonghua Paint (Xinfeng)
Company, Foshan Shunde Badfu Industrial Co., Ltd., Chongqing Sanxia Paint Co., Ltd., Zhejiang Fei Whale New Materials Technology Co., Ltd.
Company, Zhuzhou Jiuhua New Material Coating Industry Co., Ltd., Heilongjiang Quality Supervision and Inspection Institute, Zhejiang Tiannv Group Paint Co., Ltd.
Company, Ningbo Xin'an Coating Co., Ltd., Dongguan Guzhuo Precision Components Co., Ltd., Fujian Gongda Construction Engineering Testing Co., Ltd.
The main drafters of this section. Cao Bihui, Wang Chongwu, Xing Yu, Gao Jun, Sun Lide, Chen Jiangang, Zhao Shaohong, Long Maoming, Liu Wei, Long Fengjia,
Dong Shuangjian, Fu Chao, Wang Ruihong, Wang Zhi, Liu Fengjuan, Xu Zhongcheng, Yan Chaoming, Zou Qiqiang, Yao Fei, Xu Jinbao, Deng Jianhua, Tian Jianping.
Paints and varnishes - Drying test - Part 1.
Determination of complete dryness and complete drying time
1 Scope
This part of GB/T 37362 specifies the measurement of paint, varnish or single-coating of related products under standard conditions. The composite coating system is
Test method for the time required to reach a completely dry state and reach a completely dry state after the specified drying time.
This section applies to paints, varnishes or single coats of related products, complete dryness of the composite coating system and complete drying time
Determination.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document.
For the undated references, the latest version (including all amendments) applies to this document.
GB/T 3186 paint, varnish and paint and varnish raw materials sampling (GB/T 3186-2006, ISO 15528.2000, IDT)
GB/T 6031 Determination of hardness of vulcanized rubber or thermoplastic rubber (10IRHD~100IRHD) (GB/T 6031-2017,
ISO 48.2010, IDT)
GB/T 9271 Standard paint and varnish test panels (GB/T 9271-2008, ISO 1514.2004, MOD)
GB/T 9278 Temperature and humidity of paint sample condition adjustment and test (GB/T 9278-2008, ISO 3270.1984, IDT)
GB/T 13452.2 Determination of film thickness of paints and varnishes (GB/T 13452.2-2008, ISO 2808.2007, IDT)
Inspection and preparation of GB/T 20777 paint and varnish samples (GB/T 20777-2006, ISO 1513.1992, IDT)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
IRHD rating IRHDscale
International rubber hardness grade.
3.2
Completely dry state through-drystate
The entire coating is completely dry.
Note 1. The completely dry state is different from the surface where the coating surface is dry but the inside is still flowing.
Note 2. For the purposes of this section, if the coating is tested using the specified procedure using the specified procedure, the coating is considered to have not been damaged after a specified period of time.
A single coating of paint, varnish or related product, the composite coating system is completely dry.
3.3
Complete drying time through-drytime
Under the specified test conditions, the specified test procedure is used to determine the coating from application to the test panel until the coating is completely dry.
The time used by the state.
4 Principle
Apply a certain thickness of paint or varnish to the substrate and dry it under specified conditions. Apply a certain amount to the test area on the surface of the coating.
The load is then rotated 90° on the surface of the coating to determine the degree of dryness of the entire coating by examining the damage on the surface of the coating.
5 instruments and materials
5.1 Unit with base and column (see Figure 1, Figure 2). Contains a base and a freely slidable column. The diameter of the column head is at least
25mm, the lower surface should be able to fit tightly with the upper surface of the test sample. The rubber disc (see 5.2) is glued to the bottom of the press head with double-sided tape.
Center, then fix the wire mesh (see 5.3) to the bottom of the rubber plate, the pressure head can be rotated 90°.
Note 1. If the mass of the press column does not exceed 250g, the equipment described in GB/T 9280 can also be used for testing.
Note 2. It is recommended to use the ball joint to connect the pressure column and the pressure column head. The pressure column specified in GB/T 9280 can also be used.
Description.
1---load;
2---pressing column;
3---ball joint;
4---pressed column head;
5---base.
Figure 1 Schematic diagram of the device with base and press column
Description.
1---pressing column;
2---clip;
3---the lever used to rotate the column head;
4---wire mesh;
5---double-sided tape;
6---Rubber disk.
Figure 2 Schematic diagram of the assembly of the column head assembly
5.2 Rubber disc. diameter (22 ± 1) mm, thickness (5 ± 0.5) mm and hardness (50 ± 5) IRHD grade (see GB/T 6031).
Note. It is recommended to use the rubber disc specified in GB/T 9273.
5.3 Wire mesh. woven from monofilament polyamide, the minimum size is 100mm × 100mm. The diameter of the monofilament is (0.12 ± 0.01) mm, the pore size is about
0.2mm.
5.4 Load. The total mass is (1500±10)g.
5.5 stopwatch. accuracy is 0.1s.
6 sampling
According to the provisions of GB/T 3186, take a representative sample of the test product (or each product in the multi-coat system).
Test and prepare test samples according to GB/T 20777.
7 test board
7.1 Substrate
Select 3 test plates of the type specified in GB/T 9271 as the substrate (if both the dry state and the complete drying time are measured simultaneously)
6) and ensure that the selected substrate is as consistent as possible for the actual use.
7.2 Handling and painting
Dispose of the substrate according to the provisions of GB/T 9271 (see 7.1), apply the sample or system to be tested in the prescribed manner to obtain the specified dry film
thickness.
The method of painting and the thickness of the dry film shall be specified by the manufacturer of the product or agreed upon by the relevant party and noted in the test report [see Chapter 10]
c) 2) and c) 3)].
8 test steps
8.1 Instrument preparation
Clamp the screen (see 5.3) on the rubber disc under the column head (see 5.2) (see Figure 2), taking care to ensure that the surface of the screen is not wrinkled.
The test was replaced with a new screen.
8.2 Drying of test panels
Unless otherwise specified, the condition adjustment of the test panel and the temperature and humidity of the test shall comply with the provisions of GB/T 9278.
Under the specified conditions, dry or bake the test panels and place them for a specified period of time. If applicable, place each test panel horizontally as much as possible.
The location of air circulation should avoid interference from external airflow and direct sunlight.
Self-drying or drying, the time and conditions of placement are specified by the product manufacturer, or agreed by the relevant parties, and noted in the test report [see section
Chapter 10 c) 4) and c) 5)]. Unless otherwise specified, after the baking varnish is baked, it is tested immediately after curing to ambient temperature.
Unless otherwise specified, the complete drying state of the composite coating system and the complete drying time are tested for the outermost coating.
8.3 Determination of complete dry state
8.3.1 Place the test panel on the base after the specified drying time (see 8.2).
8.3.2 Place the load (see 5.4) on top of the column and gently lower the column to bring the screen into contact with the plate. Start the stopwatch (see 5.5) and keep it
(10±1)s.
8.3.3 After the specified time has elapsed, rotate the column head 90° within 2 s, and immediately raise the column, remove the test plate and visually inspect the test area.
8.3.4 Repeat 8.3.1~8.3.3 on the other 2 test panels.
8.3.5 If no damage is observed on any of the three test panels, the result is “to achieve complete dryness”. If there are 3 test panels
Damage was observed on one or more of the surfaces, and the result was “not fully dry”.
Some coatings are not completely unaffected by testing, even if they have reached a functionally acceptable dry or cured state (eg wire mesh)
There is a mark on the surface of the coating.) In this case, the test operation should be taken without causing damage to the coating so that the coating cannot perform its final work.
The drying time required for the state of energy.
For some coatings, such as those used to protect the substrate, not for aesthetic reasons, the impression of the surface does not result in a loss of functionality of the coating.
For dark coatings, the rotation of the screen causes the surface to be polished, leaving traces that may not compromise the final function of the coating.
In all cases, all observed phenomena should be recorded in the test report.
Care should be taken to avoid confusing the two forms of damage. The cohesive failure in the coating is a form of damage in this test, between the coating and the substrate.
Attachment damage is not a form of damage in this test.
8.4 Determination of complete drying time
8.4.1 Place the test panel on the base after the specified drying time (see 8.2).
8.4.2 After appropriate intervals, test according to 8.3.2 and 8.3.3. Check the damage of the coating in the test area. When no damage occurs
Stop the test (see 8.3.5).
8.4.3 Repeat 8.4.1~8.4.2 on the other 2 test panels.
8.4.4 Report the maximum time taken for the coating to reach a completely dry state in 3 trials. The results are expressed in hours (h) or minutes (min).
8.5 Thickness of the coating
In the untested area of the test panel, determine the thickness of the coating in its completely dry state, in micrometers, in accordance with the procedure specified in GB/T 13452.2.
(μm) indicates.
9 precision
There is currently no effective precision data.
10 test report
The test report shall include at least the following.
a) indicate all the information necessary to identify the product under test;
b) indicate the part number;
c) Indicate the details of the preparation of the test panel, including.
1) Material and surface treatment of the substrate (see 7.1 and 7.2);
2) The method of applying the test coating to the substrate (see 7.2);
3) The thickness of the dry coating [in micrometer (μm)] and the test method (GB/T 13452.2) (see 8.5), and indicate that it is a single coating
Still a composite coating;
4) If applicable, the complete dry state of the coating, the time and conditions of drying, and the conditions of placement (see 8.3) shall be assessed prior to testing;
5) When determining the complete drying time, the self-drying or baking conditions of the coating, placement conditions and test intervals should be considered (see 8.4).
d) The test results specified in Chapter 8 include.
1) Whether the coating has reached a completely dry state;
2) complete drying time;
3) All observed phenomena (see 8.3.5, paragraph 3).
e) any difference from the specified test method;
f) any anomalies observed during the test;
g) Test date.
Appendix A
(informative appendix)
Technical differences between this part and ISO 9117-1.2009 and their causes
Table A.1 gives a list of the technical differences between this part and ISO 9117-1.2009 and their causes.
Table A.1 Technical differences between this part and ISO 9117-1.2009 and their causes
The reason for the technical difference in the chapter number of this part
1 Put the complete drying time in the note into the scope text in accordance with the national standard expression
ISO 48 is replaced by the corresponding Chinese document GB/T 6031;
ISO 1513 is replaced by the corresponding Chinese document GB/T 20777;
ISO 1514 is replaced by the corresponding Chinese document GB/T 9271;
ISO 2808 is replaced by the corresponding Chi...