Determination of flexibility of coating and putty films
1 Scope
This standard specifies the determination of flexibility of coating and putty films by using a flexibility tester, and the flexibility of coating and putty films is expressed by the minimum shaft diameter at which the coating and putty films will not be damaged.
This standard is applicable to the determination of flexibility of coating and putty films.
2 Normative references
The 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 9271 Paints and varnishes - Standard panels for testing
GB/T 9278 Temperatures and humidities for conditioning and testing of paint specimens
GB/T 13452.2 Paints and varnishes - Determination of film thickness
GB/T 20777 Paints and varnishes - Examination and preparation of samples for testing
GB/T 37356 Paints and varnishes - Lighting and procedure for visual assessments of coatings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
flexibility
capability of coating or putty films to deform along with its substrate without damage
4 Determination of flexibility of coating
4.1 Apparatus
4.1.1 Coating flexibility tester
The coating flexibility tester consists of seven shafts with different diameters or curvature radii, which are fixed on the base. The schematic diagram is shown in Figure 1, and the sectional views of shafts 5, 6 and 7 of the coating flexibility tester are shown in Figure 2. The dimensions of each shaft are as follows:
——Shaft 1: about 35mm in length and mm in diameter φ;
——Shaft 2: about 35mm in length and mm in diameter φ;
——Shaft 3: about 35mm in length and mm in diameter φ;
——Shaft 4: about 35mm in length and mm in diameter φ;
——Shaft 5: about 35mm in length, about 10mm in height, 3mm in thickness and (1.5±0.1)mm in curvature radius R (3mm in diameter φ);
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Determination of flexibility of coating
5 Determination of flexibility of putty films
6 Test report
Determination of flexibility of coating and putty films
1 Scope
This standard specifies the determination of flexibility of coating and putty films by using a flexibility tester, and the flexibility of coating and putty films is expressed by the minimum shaft diameter at which the coating and putty films will not be damaged.
This standard is applicable to the determination of flexibility of coating and putty films.
2 Normative references
The 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 9271 Paints and varnishes - Standard panels for testing
GB/T 9278 Temperatures and humidities for conditioning and testing of paint specimens
GB/T 13452.2 Paints and varnishes - Determination of film thickness
GB/T 20777 Paints and varnishes - Examination and preparation of samples for testing
GB/T 37356 Paints and varnishes - Lighting and procedure for visual assessments of coatings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
flexibility
capability of coating or putty films to deform along with its substrate without damage
4 Determination of flexibility of coating
4.1 Apparatus
4.1.1 Coating flexibility tester
The coating flexibility tester consists of seven shafts with different diameters or curvature radii, which are fixed on the base. The schematic diagram is shown in Figure 1, and the sectional views of shafts 5, 6 and 7 of the coating flexibility tester are shown in Figure 2. The dimensions of each shaft are as follows:
——Shaft 1: about 35mm in length and mm in diameter φ;
——Shaft 2: about 35mm in length and mm in diameter φ;
——Shaft 3: about 35mm in length and mm in diameter φ;
——Shaft 4: about 35mm in length and mm in diameter φ;
——Shaft 5: about 35mm in length, about 10mm in height, 3mm in thickness and (1.5±0.1)mm in curvature radius R (3mm in diameter φ);
Contents of GB/T 1731-2020
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Determination of flexibility of coating
5 Determination of flexibility of putty films
6 Test report
