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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 Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 37362.1-2019: Paints and varnishes -- Drying tests -- Part 1: Determination of through-dry state and through-dry time---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT37362.1-2019 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 87.040 G 50 Paints and varnishes - Drying tests - Part 1: Determination of through-dry state and through-dry time (ISO 9117-1:2009, MOD) ISSUED ON: MARCH 25, 2019 IMPLEMENTED ON: FEBRUARY 01, 2020 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Principle ... 6 5 Instruments and materials ... 6 6 Sampling ... 8 7 Test panel ... 8 8 Test steps ... 9 9 Precision ... 10 10 Test report ... 10 Annex A (informative) Technical differences and reasons between this Part and ISO 9117-1:2009 ... 12 Bibliography ... 14ForewordGB/T 37362 “Paints and varnishes - Drying tests” consists of 6 parts: - Part 1: Determination of through-dry state and through-dry time; - Part 2: Resistance to chip test; - Part 3: Paint surface drying test - Small glass ball method; - Part 4: Determination method using recorder; - Part 5: Improved Bando-Wolf test method; - Part 6: No print test. This Part is Part 1 of GB/T 37362. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part uses redrafting method to modify and adopt ISO 9117-1:2009 “Paints and varnishes -- Drying tests -- Part 1: Determination of through-dry state and through-dry time”. Compared with ISO 9117-1:2009, there are technical differences in this Part. The terms involved in these differences have been marked by a vertical single line (│) at the margin of the outer margin. A list of the corresponding technical differences and their causes is given in Annex A. This Part made the following editorial modifications: - added informative Annex A. This Part was proposed by China Petroleum and Chemical Industry Federation. This Part shall be under the jurisdiction of National Technical Committee on Paints and Pigments of Standardization Administration of China (SAC/TC 5). The drafting organizations of this Part: Jiangsu Lanling Polymer Material Co., Ltd., Changzhou Guanghui New Materials Research Institute Co., Ltd., Anhui Linghu Paint Co., Ltd., CNOOC Changzhou Coating Chemical Research Institute Co., Ltd., AVIC Baimu New Material Technology Engineering Co., Ltd., Dongguan Enfeng Building Materials Technology Co., Ltd., Zhongche Tangshan Locomotive & Rolling 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) Co., Ltd., Foshan Shunde Badfu Industrial Co., Ltd., Chongqing Three Gorges Paints and varnishes - Drying tests - Part 1: Determination of through-dry state and through-dry time1 ScopeThis Part of GB/T 37362 specifies the test methods for determining whether single coating, composite coating system of paints, varnishes or related products reach the through-dry state and through-dry time required after the specified drying time under standard conditions. This Part is applicable to the determinations of through-dry state and through- dry time required for single coating, composite coating system of paints, varnishes or related products.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 3186, Paints varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528:2000, IDT) GB/T 6031, Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD) (GB/T 6031-2017, ISO 48:2010, IDT) GB/T 9271, Paints and varnishes standard panels for testing (GB/T 9271- 2008, ISO 1514:2004, MOD) GB/T 9278, Temperatures and humidities for conditioning and testing of paint specimens (GB/T 9278-2008, ISO 3270:1984, IDT) GB/T 13452.2, Paints and varnishes - Determination of film thickness (GB/T 13452.2-2008, ISO 2808:2007, IDT) GB/T 20777, Paints and varnishes - Examination and preparation of samples for testing (GB/T 20777-2006, ISO 1513:1992, IDT) 1 - press column; 2 - clamp; 3 - tie rod for rotating the column head; 4 - wire mesh; 5 - double-sided tape; 6 - rubber disc. Figure 2 -- Detailed diagram of the assembly of the column head 5.2 Rubber disc: diameter is (22 ± 1) mm, thickness is (5 ± 0.5) mm and hardness is (50 ± 5) IRHD scale (see GB/T 6031). NOTE: It is recommended to use the rubber disc specified in GB/T 9273. 5.3 Wire mesh: it is woven from monofilament polyamide; the smallest size is 100mm × 100mm. the diameter of the monofilament is (0.12±0.01) mm and the pore diameter is about 0.2 mm. 5.4 Load: the total mass is (1500±10) g. 5.5 Stopwatch: the accuracy is 0.1 s.6 SamplingAccording to the provisions of GB/T 3186, take a representative sample of the test product (or each product in a multi-coat system). According to the provisions of GB/T 20777, check and prepare the test sample.7 Test panel7.1 Substrate Select 3 test panels of the type specified in GB/T 9271 as the substrate (6 pieces are required if the through-dry state and the through-dry time are simultaneously measured). And make sure that the selected substrate is as consistent as possible with the actual application. 7.2 Processing and painting Process the substrate according to the provisions of GB/T 9271. Apply the sample or system to be tested in the prescribed manner to obtain the specified dry film thickness. The coating method and dry film thickness shall be specified by the product manufacturer or agreed by the relevant parties and noted in the test report [see Some coatings, even if they have reached a functionally acceptable dry or cured state, are not completely unaffected by the test (e.g., the wire mesh is imprinted on the surface of the coating). In this case, it shall take the required drying time that the test operation does not cause the coating to be damaged so that the coating does not perform its final functional state. For some coatings, such as those used to protect the substrate, not for aesthetic reasons, the impression of the surface does not cause the functional failure of the coating. For dark coatings, the rotation of the wire mesh shall cause the surface to be polished, leaving traces that may not compromise the final function of the coating. In this case, all observed phenomena shall be recorded in the test report. Avoid confusing two forms of destruction. Cohesive failure in the coating is a form of damage in this test. The adhesion damage between the coating and the substrate is not the damage form of this test. 8.4 Determination of through-dry time 8.4.1 Place the test panel on the base after the specified drying time (see 8.2). 8.4.2 Test according to 8.3.2 and 8.3.3 at appropriate intervals. Check the coating damage in the test area. Stop the test when no damage occurs (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 longest time it takes for the coating to reach the through-dry state in 3 trials. The result is expressed in hours (h) or minutes (min). 8.5 Coating thickness In the untested area of the test panel, determine the thickness of the coating in its through-dry state, in micrometer (μm), according to the procedure specified in GB/T 13452.2.9 PrecisionThere is currently no effective precision data.10 Test reportThe test report shall at least contain the following information: a) all the information necessary to identify the product under test; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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