GB/T 3903.6-2024Footwear - Test methods for whole shoe - Slip resistance (English PDF)

5.2 Test medium

5.2.1 Glycerol aqueous solution Glycerol aqueous solution, which has a mass fraction of 85.3% ~ 92.6% and a viscosity of (0.2 ± 0.1) Pa·s [(200 ± 100) cP]. Since glycerol aqueous solution is hygroscopic in air with a relative humidity greater than 32%, the glycerol aqueous solution on the test interface shall be replaced when the test time exceeds 30 min.

5.2.2 Detergent solution Sodium dodecyl sulfate aqueous solution, which has a mass fraction of (0.5 ± 0.05)%.

5.2.3 Grade-3 water It shall meet the requirements of grade-3 water in GB/T 6682-2008.

5.2.4 Cleaning fluid or antifreeze mixture Ethanol aqueous solution which has a mass fraction of (50 ± 5)%.

5.3 Test interface

5.3.1 Glass interface Glass plate with a smooth surface.

5.3.2 Ceramic tile interface Dry-pressed ceramic tiles, which have a water absorption rate of less than or equal to 0.5%, shall be 10 mm thick. The dry friction coefficient of the ceramic tiles, which is measured by the method specified in Appendix A, is within 0.57 ~ 0.63; the wet friction coefficient is within 0.44 ~ 0.50.

Note 1: See GB/T 3810.3 for the test method of water absorption of ceramic tiles.

Note 2: See GSB 16-4167 for national standard specimens of ceramic tiles.

5.3.3 Wood floor interface The solid wood composite floor with maple surface layer shall be 24 mm thick. The dry friction coefficient of the wood floor measured by the method specified in Appendix A is within 0.47 ~ 0.53. The physical and chemical properties of wooden flooring shall comply with the provisions of solid wood composite flooring in Table 6 of GB/T 20239- 2023; the functional requirements shall comply with the provisions of suspended paving and fixed paving for competition, training, teaching in Table 8 of GB/T 20239-2023.

6.1 Specimens

6.1.1 Number of specimens Whole shoes or soles: Not less than 1 pair.

6.1.2 Specimen preparation

6.1.2.1 Cleaning Before each test, the test part of the specimen shall be cleaned with cleaning fluid (5.2.4) and dried.

6.1.2.2 Lasting For whole shoe specimens, select the corresponding last for lasting; use appropriate methods to ensure that the test last and the insole or insole do not slide relative to each other; for sole specimens, use adhesive to stick the sole to the bottom of the corresponding last.

6.2 Environmental conditioning Place the prepared specimen in the reference standard environmental conditions specified in GB/T 22049 for at least 4 hours.

7.1 Test conditions

7.1.1 The test speed is (0.30 ± 0.03) m/s. Special requirements can be selected within

0.1 m/s ~

0.5 m/s.

7.1.2 The vertical load is selected according to the shoe size. For shoes with a shoe size of 250 (inclusive) or above, the vertical load is (400 ± 20) N; for shoes with a shoe size of less than 250 and more than 205 (inclusive), the vertical load is (350 ± 20) N; for shoes with a shoe size of less than 205, the vertical load is (160 ± 20) N. Special requirements can be selected within 100 N ~ 600 N.

7.1.3 The test shall be carried out under the reference standard environmental conditions specified in GB/T 22049. wedge block; in the forefoot mode, place the bottom of the specimen flat on the wedge block; align the edge of the specimen forefoot plane with the 4 mm marking line of the wedge block.

7.3 Test steps...

7.3.1.4 Apply the required vertical load to the specimen within

0.2 s before sliding (see 7.1.2); test at the speed specified in 7.1.1. The test curve is shown in Figure 1. Record the first peak friction force of the specimen after the start of sliding, which is the static friction force of the specimen. At the same time, record all the friction forces of the specimen within

0.3 s ~

0.6 s after the start of sliding; calculate the average friction force within

0.3 s ~

0.6 s, which is the dynamic friction force of the specimen.

7.3.1.5 The same specimen is tested three times in total according to the steps of 7.3.1.1 ~ 7.3.1.4.

7.3.2 Slip resistance performance test of wet interface (except frost interface)

7.3.2.1 Operate according to the steps of 7.3.1.1 ~ 7.3.1.3.

7.3.2.2 Select the corresponding test medium according to the test purpose or the product standard (see 5.2); measure 20 mL of the test medium; pour it on the test interface surface below the test part of the specimen. Before each test, if the previous test leaves traces of specimen movement, the test interface shall be wiped clean and the test medium shall be weighed and poured again. Each time other test media are changed, the test interface shall be cleaned with a rag and cleaning fluid (5.2.4) before testing.

7.3.2.3 Test and record in accordance with the provisions of 7.3.1.4.

7.3.2.4 The same specimen shall be tested three times in total according to the steps of 7.3.2.1 ~ 7.3.2.3.

7.3.3 Anti-skid performance test of frost interface

7.3.3.1 The ice interface (dry type) is prepared and tested as follows:

a) Measure at least 500 mL of antifreeze mixture (5.2.4); inject it into the ice water tray of the frost interface preparation instrument (5.7); set the temperature to (-7 ± 2) °C. Immerse the outer bottom of the specimen in the ice water tray for at least 1 hour.

b) Measure an appropriate amount of grade-3 water (see 5.2.3); inject it into the ice surface plate of the frost interface preparation instrument (5.7). The water depth is at least 4 mm; the temperature is set to (-7 ± 2) °C, so that the water in the ice surface plate forms a solid ice surface.

c) Use the heated flattening device to flatten the ice surface and quickly wipe off the excess water. After forming a solid and flat ice surface, quickly cover the ice tray with a lid, to ensure that water vapor in the air does not enter the ice tray and form a frost surface.

d) Select the corresponding test mode according to the test purpose or product standard (see 7.2).

e) After the ice surface is formed, quickly remove the specimen from the ice water tray; wipe the outer bottom of the specimen dry; install it on the test instrument fixture. Place a hard interface with the same thickness as the ice tray on the table for pre-compression; after the pre-compression is completed, replace the ice interface.

f) Test and record according to the provisions of 7.3.1.4.

g) Test the same specimen 3 times in total. After each test, immerse the outer bottom of the specimen in the ice water tray again, ensuring that it is immersed for at least 1 hour before the next test. Repeat the test according to the steps of

7.3.3.1

b) Use the heating flattening device to flatten the ice surface and quickly wipe off the excess water to form a solid and flat ice surface.

c) Place the above ice tray in the environment of

7.1.3 for frosting; ensure that the ice surface can form a soft, snow-white, icy frost surface with a thickness of (2 ± 0.5) mm within

1.5 hours. During the frosting process, use a steel ruler (see 5.8) to measure the thickness of the frost surface.

d) Select the corresponding test mode according to the test purpose or the product standard (see 7.2).

7.3.3.2

7.3.3.3 Frost interface, prepare and test as follows:

a) Follow the steps of