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GB/T 3903.33-2019 English PDF (GBT3903.33-2019)

GB/T 3903.33-2019 English PDF (GBT3903.33-2019)

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GB/T 3903.33-2019: Footwear -- Test methods for insoles and insocks -- Water absorption and desorption

GB/T 3903.33-2019
Footwear - Test methods for insoles and insocks - Water absorption and desorption ICS 61.060
Y78
National Standards of People's Republic of China
Replace GB/T 3903.33-2008
Insole and inner pad test method
Water absorption rate and desorption rate
(ISO 22649.2016, IDT)
Published on.2019-08-30
2020-03-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 3903.33-2008 "Shoes insole and inner pad test method water absorption and desorption rate", and Compared with GB/T 3903.33-2008, the main technical changes are as follows. --- Revised scope (see Chapter 1, Chapter 1 of the.2008 edition);
--- Revised the normative reference document (see Chapter 2, Chapter 2 of the.2008 edition); --- Added surface terms and definitions (see 3.3);
--- Add an explanation in Figure 1 (see 4.2.1);
--- Revised the test report (see Chapter 8, Chapter 8 of the.2008 edition). This section uses the translation method equivalent to ISO 22649.2016 "shoes insole and inner pad test method water absorption and desorption rate". The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows. ---GB/T 22050-2008 Sampling position, preparation and environmental adjustment time of footwear samples and samples (ISO 17709.2004, IDT);
---GB/T 22049-2019 Standard environment for environmental conditioning and testing of footwear footwear and footwear components (ISO 18454.2018, IDT).
Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This part was proposed by the China Light Industry Federation.
This part is under the jurisdiction of the National Technical Committee for the Standardization of Footwear (SAC/TC305). This section was drafted. Jiaxing City Fur and Footwear Industry Research Institute, China Leather Shoes Research Institute Co., Ltd., Foshan Linzhi Polymer Materials Technology Co., Ltd.
The main drafters of this section. Jiang Sujie, Meng Hongwei, Wang Xiaogang, Chen Yu. The previous versions of the standards replaced by this section are.
---GB/T 3903.33-2008.
Insole and inner pad test method
Water absorption rate and desorption rate
1 Scope
This part of GB/T 3903 specifies two test methods for determining the water absorption and desorption rate of the insole and inner pad, excluding materials. The two methods are as follows.
--- Method A. Determine the static water absorption and desorption rate of the insole and inner pad; --- Method B. Determine the dynamic water absorption and desorption rate of the insole and inner pad. 2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. ISO 17709 Sampling position, preparation and environmental conditioning time for footwear samples and specimens (Footwear-Samplinglocation, Preparationanddurationofconditioningofsamplesandtestpieces)
ISO 18454 Standard environment for environmental conditioning and testing of footwear footwear and footwear components (Footwear-Standardatmospheres Forconditioningandtestingoffootwearandcomponentsforfootwear)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Water absorption rate
The mass per unit area increases after the sample absorbs moisture within the specified time. 3.2
Desorption rate waterdesorption
Percentage of mass loss of the sample relative to the water absorption mass of the sample. 3.3
Surface surface
The visible portion of the shoe material when the shoe is worn.
4 Test equipment and materials
4.1 Method A
4.1.1 Balance, accurate to 0.001g.
4.1.2 Square knife, cut sample is (50 ± 1) mm × (50 ± 1) mm. The blade edge of the die has an outward angle of about 5°, so when sampling The knife will not damage the edges of the specimen.
4.1.3 Filter paper.
4.1.4 Distilled water.
4.1.5 Beaker or container, flat bottom, appropriate volume.
4.1.6 Vernier caliper, accurate to 0.2mm.
4.2 Method B
4.2.1 The equipment (see Figure 1) includes the following sections.
4.2.1.1 The copper drum (A) has a diameter of (120 ± 1) mm and a width of (50 ± 1) mm and is placed on the sample (B). 4.2.1.2 Platform (C), the upper surface is rough and there are enough holes to allow water to flow through the platform to keep the surface of the platform moist. Platform (C) The upper surface is covered with cotton gauze.
4.2.1.3 Fixture (D), clamp the short side of the specimen (B) so that it is level on the platform (C). 4.2.1.4 Fixture (E), the other short side of the specimen is fixed to the drum, and the short side clamped is parallel to the axis of the drum. The clamp passes through the weak spring The lines are fixed to maintain a slight tension on the sample.
4.2.1.5 Water supply equipment (F), through the platform (C), can drain excess water. 4.2.1.6 Move the shaft of the roller and reciprocate along the XX axis with a displacement of (50±2) mm. The midpoint of the sample is the center point and the frequency is (20± 1) times/min. The movement of the shaft drives the drum to reciprocate on the sample, and the degree of bending of the sample is consistent with the shape of the drum. 4.2.1.7 Apply (80 ± 5) N of pressure to the platform, sample and drum.
Description.
A---copper drum;
B---sample;
C---platform;
D---fixture;
E---fixture;
F---water supply equipment;
G---spring.
Figure 1 Equipment for determining water absorption and desorption rate 4.2.2 Mold knife, cut the sample size (110 ± 1) mm × (40 ± 1) mm.
4.2.3 Balance, accurate to 0.001g.
4.2.4 stopwatch, accurate to 1s.
4.2.5 Silicone grease.
5 Sampling and environmental conditioning
5.1 Method A
Using a square knife (4.1.2), cut the specimen from the insole or inner pad, the molded insole or the parts provided, the size is (50 ± 1) mm × (50 ± 1) mm. Sampling from shoes or cut parts shall be in accordance with ISO 17709. Perform at least 24h environmental conditioning as specified in ISO 18454. There must be no less than two samples per group.
5.2 Method B
5.2.1 If sampling from the shoe, it is advisable to take a sample from the front of the insole in the longitudinal direction. If sampling from the sheet, it should be perpendicular to each other The two main directions are sampled. There must be no less than two samples per group. 5.2.2 The sample is a strip specimen of (110 ± 1) mm × (40 ± 1) mm and shall be subjected to at least 24 h according to ISO 18454 before the test. Environmental regulation.
5.2.3 Apply a small amount of silicone grease to the side of the specimen to prevent water from penetrating into the specimen from the edge of the specimen. 6 Test methods
6.1 Method A
6.1.1 Determination of water absorption
The length and width of the specimen were measured using a vernier caliper (4.1.6) in millimeters to the nearest 0.2 mm. Calculate its area, denoted as A, to Said in square meters.
Weigh the sample with a balance (4.1.1) to the nearest 0.01g, denoted M0. The sample was placed in distilled water and subjected to environmental conditioning for 6 h as specified in ISO 18454. Take out the sample and use a filter paper to remove excess Moisture, so that the sample no longer drip, weighed, recorded as MF.
The test temperature should be (20 ± 2) °C.
6.1.2 Determination of desorption rate
After the completion of the step 6.1.1, the sample is subjected to an environmental adjustment for 16 h according to ISO 18454, and then weighed with a balance (4.1.1). Recorded as MR.
6.2 Method B
6.2.1 Principle
The sample is placed on a wet platform and repeatedly bent under a certain pressure (similar to the bending motion of the insole during wear of the footwear). 6.2.2 Determination of water absorption
6.2.2.1 Weigh the sample to the nearest 0.001 g (M0).
6.2.2.2 Place the cotton gauze on the platform (C).
6.2.2.3 Place the specimen on the test equipment and place the surface in contact with the foot down on the platform (C) covering the cotton gauze. Put two short sides They are fixed on the platform and the drum, respectively, and a force of (80 ± 5) N is applied. 6.2.2.4 Open the inlet valve and adjust the water flow rate on the platform to 7.5 mL/min. 6.2.2.5 Start the instrument and record the start time of the test.
6.2.2.6 After the appropriate time (15 min), the water supply is stopped 1 min before the instrument is stopped. 6.2.2.7 Remove the sample and weigh it to the nearest 0.001 g.
6.2.2.8 Re-place the sample on the test equipment, open the inlet valve and continue the test. The test time was 8 h. 6.2.2.9 If the sample is taken out due to saturation of the sample before the 8h test time is over, remove it and place it in a plastic bag until Enough time. Drying was completed for 16 h as specified in 6.2.3.
6.2.3 Determination of desorption rate
The sample was subjected to an environmental adjustment for 16 h as specified in ISO 18454, and the sample was reweighed to the nearest 0.001 g, denoted as MR. 7 test results
7.1 Method A
7.1.1 Water absorption rate
Calculate the water absorption rate WA according to formula (1) in g/m2. WA=
MF-M0
(1)
In the formula.
M0---the original mass of the sample in the dry state, the unit is gram (g); MF---the final mass of the sample in wet state, in grams (g);
A --- The area of the sample in square meters (m2).
The result is accurate to 1 g/m2.
The result is the average of the results of the two tests.
7.1.2 Desorption rate
Calculate the desorption rate WD according to equation (2), expressed in %. WD=
MF-MR
MF-M0×
100 (2)
In the formula.
M0---the original mass of the sample, in grams (g);
MF---the final mass of the sample, in grams (g);
MR---The mass of the sample after environmental adjustment, in grams (g). The result is accurate to 1%.
7.2 Method B
7.2.1 Water absorption rate
Calculate the water absorption rate WA in equation (3) in g/m2.
WA=
MF-M0
(3)
In the formula.
M0---the original mass of the sample, in grams (g);
MF---the final mass of the sample, in grams (g);
A---The area of the sample, in square meters (m2).
The result is accurate to 1 g/m2.
7.2.2 Desorption rate
Calculate the desorption rate WD according to equation (4), expressed in %. WD=
MF-MR
MF-M0×
100 (4)
In the formula.
M0---the original mass of the sample, in grams (g);
MF---the final mass of the sample, in grams (g);
MR---The mass of the sample after environmental adjustment, in grams (g). The result is accurate to 1%.
8 test report
8.1 Method A
The test report should contain the following.
a) the number of this part;
b) the results of water absorption and desorption rate, performed in accordance with 7.1.1 and 7.1.2; c) the material and detailed description of the sample;
d) a description of the relevant sampling process;
e) test method;
f) any deviation of the test method;
g) Test date.
8.2 Method B
The test report should contain the following.
a) the number of this part;
b) the results of water absorption and desorption rate, performed in accordance with 7.2.1 and 7.2.2; c) the material and detailed description of the sample;
d) a description of the relevant sampling process;
e) test method;
f) any deviation of the test method;
g) Test date.

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