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GB/T 16641-2019 English PDF (GBT16641-2019)

GB/T 16641-2019 English PDF (GBT16641-2019)

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GB/T 16641-2019: Footwear -- Test methods for whole shoe -- Dynamic waterproofness

This Standard specifies the test methods for dynamic waterproofness of whole shoe. This Standard is applicable to the detection of dynamic waterproofness of various types of whole shoes. This Standard does not apply to whole shoes of which the footwear size is less than 230.
GB/T 16641-2019
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 61.060
Y 78
Replacing GB/T 16641-1996
Footwear - Test methods for whole shoe -
Dynamic waterproofness
ISSUED ON: AUGUST 30, 2019
IMPLEMENTED ON: MARCH 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Principle ... 4
4 Test equipment and materials ... 4
5 Sample and conditioning ... 6
6 Test conditions ... 6
7 Test steps ... 6
8 Result expression ... 7
9 Test report ... 7
Footwear - Test methods for whole shoe -
Dynamic waterproofness
1 Scope
This Standard specifies the test methods for dynamic waterproofness of whole shoe.
This Standard is applicable to the detection of dynamic waterproofness of various types of whole shoes.
This Standard does not apply to whole shoes of which the footwear size is less than 230.
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 undated references, the latest edition (including all amendments) applies to this document.
GB/T 22049-2019, Footwear. Standard atmospheres for conditioning and
testing of footwear and components for footwear
QB/T 2885-2007, Footwear. Test methods for outsoles. Flex resistance
3 Principle
Install the whole shoe on the whole shoe dynamic waterproofness testing machine; place a certain depth of water in the water tank of the testing machine to contact with the shoe; the testing machine pushes the forefoot bending of the shoe to simulate the walking state at a certain angle and frequency, to test the number of bends or the time that is required to penetrate water from the outside to the inside of the shoe.
4 Test equipment and materials
4.1 Whole shoe dynamic waterproofness testing machine (see Figure 1)
4.1.1 Testing machine movable plate; it is used to push the forefoot bending of the shoe to simulate walking; the swing frequency is 60 times/min ~ 65
times/min; the maximum bending angle is adjustable.
5 Sample and conditioning
5.1 The sample shall be the whole shoe after 48 hours of processing.
5.2 The sample shall be free of obvious defects.
5.3 Each group of samples shall be not less than two pairs.
5.4 Before the test, the sample shall be placed for at least 4 hours under the temperature conditions of the reference standard atmosphere in accordance with the provisions of GB/T 22049-2019.
6 Test conditions
Perform the test at room temperature.
7 Test steps
7.1 Adjust the bending angle of the movable plate to 45????1??. In special cases, the angle of the movable plate can also be adjusted according to the test requirements.
7.2 Draw a flex line on the outsole of the shoe in accordance with 6.1 of QB/T 2885-2007.
7.3 Use adhesive tape to fix the probe of the permeable signal device on the joint between the sample flexure part insole and the upper; the probe shall be in good contact with the sample.
7.4 Put the simulated foot into the sample and install it on the platform of the testing machine.
7.5 Use water-repellent material to protect the shoe mouth, to prevent water entering the shoe from the shoe mouth during the test.
7.6 The water level of the water tank is set as follows:
a) When the shoe is placed horizontally and the forefoot is not bent, the water level in the water tank shall reach one-half of the distance BETWEEN the junction of the sole and the upper AND the seam between the upper and
the tongue;
b) When the shoe is placed horizontally and the forefoot is not bent, the water level in the water tank shall reach one-half of the distance between the outer bottom surface and the shoe mouth;

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