GB/T 3903.39-2019 PDF in English
GB/T 3903.39-2019 (GB/T3903.39-2019, GBT 3903.39-2019, GBT3903.39-2019)
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Footwear -- Test methods for uppers -- Delamination resistance
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Footwear -- Test methods for uppers -- Delamination resistance
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Standards related to (historical): GB/T 3903.39-2019
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GB/T 3903.39-2019: PDF in English (GBT 3903.39-2019) GB/T 3903.39-2019
Footwear - Test methods for uppers - Delamination resistance
ICS 61.060
Y78
National Standards of People's Republic of China
Replace GB/T 3903.39-2008
Footwear test method
(ISO 17698.2016, 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 3903.39-2008 "Sheet upper test method for interlayer peel strength", and GB/T 3903.39-
Compared to.2008, the main technical changes are as follows.
--- Revised scope (see Chapter 1, Chapter 1 of the.2008 edition);
--- Revised the canonical reference document (see Chapter 2, Chapter 2 of the.2008 edition).
This section uses the translation method equivalent to ISO 17698.2016 "Shoes upper test method interlayer peel strength".
The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.
---GB/T 3903.7-2019 footwear footwear test method aging treatment (ISO 20870..2017, IDT)
---GB/T 6682-2008 Analytical laboratory water specifications and test methods (ISO 3696.1987, MOD)
--- GB/T 16825.1-2008 Inspection of static single-axis testing machines - Part 1. Tensile and/or
Inspection and calibration (ISO 7500-1.2004, IDT)
---GB/T 22049-2019 Standard environment for environmental conditioning and testing of footwear footwear and footwear components (ISO 18454.2018,
IDT)
---GB/T 22050-2008 Sampling position, preparation and environmental adjustment time of footwear samples and samples (ISO 17709.2004,
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 drafted by. China Leather and Footwear Industry Research Institute Wenzhou Institute, China Leather Shoes Research Institute Co., Ltd., Zhejiang Olympics
Kang Shoes Industry Co., Ltd.
The main drafters of this section. Chen Qixian, Yu Shuxian, Wang Zhenduo, Feng Xugen.
The previous versions of the standards replaced by this section are.
---GB/T 3903.39-2008.
Footwear test method
1 Scope
This part of GB/T 3903 specifies the test method for the peel strength between the layers, in order to assess the suitability of the end use.
This section applies to the upper surface of coated materials.
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 3696 Analytical Laboratory Water Specifications and Test Methods (Waterforanalyticallaboratoryuse-Specification)
Andtestmethods)
ISO 7500-1 - Calibration and testing of static single-axial testing machines - Part 1 . Tension and/or pressure testing machines
Calibration and verification of force measurement systems (Metalicmaterials-Calibrationandverificationofstaticuniaxialtestingma-
chines-Part 1.Tension/compressiontestingmachines-Calibrationandverificationoftheforce-meas-
Ouringsystem)
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)
ISO 20870 Footwear-Ageingification
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Interlaminar peel strength delaminationresistance
The bond strength between the coating and the base material.
4 Test equipment and materials
The following equipment and materials should be used.
4.1 Tensile testing machine, the moving speed of the clamp is (100±10)mm/min, and the applicable force range of the sample (for polyurethane coating)
Fabric sample) is usually 0N~200N, the accuracy of measuring force should meet the requirements of level 2 in ISO 7500-1, and the force measurement accuracy is large.
At 2%.
4.2 Automatic recorder, or similar equipment, can continuously record force values.
4.3 Rapid plate press, capable of applying (550 ± 50) kPa pressure in an area of 50 mm × 70 mm.
4.4 Rubber sheet with a thickness of at least 10 mm and a hardness of (40 ± 10) IRHD.
4.5 Radiant heater, power 3kW, heating area is about 0.06m2, can heat the dry film on the resin rubber to 80 °C within 15s~
90 ° C. The film is usually placed approximately 100mm~150mm from the heater. It is advisable to use the outsole used in the production of shoes and
Activating device for the face.
4.6 Thermal pen or temperature gun, check the temperature of the film at 80 ° C ~ 90 ° C equipment. It is advisable to use a thermal pen or red with a melting temperature of 83 °C.
External temperature gun.
4.7 Resin rubber, thickness (3.5 ± 0.2) mm, hardness (95 ± 2) IRHD, surface peel strength is greater than the sample to be tested.
Note. IRHD is the international rubber hardness, hardness (95 ± 2) IRHD equivalent to (95 ± 2) Shore A.
4.8 Solvent-based polyurethane adhesive with good adhesion to resin rubber and sample coating.
4.9 Adhesive treatments, such as halogenating agents, can effectively increase the adhesion of rubber in the production of footwear.
4.10 Cutting equipment, such as punching or scissors, can cut rectangular specimens of size (50 ± 1) mm × (70 ± 1) mm. In addition, if yes
Hydrolyzed samples were tested and another shear tool was required to cut a square specimen with a side length of (70 ± 1) mm.
4.11 Shearing tools, such as sharp knives or disc knives, can be sampled from bonded specimens. This device should not be excessively compressed or will be sampled
The edge of the sample is layered, so it is not advisable to use a punching knife.
4.12 Distilled or deionized water. If wet bond strength is measured, use tertiary or deionized water in accordance with ISO 3696.
4.13 Timer, range 30s, accurate to 0.5s.
5 sampling
5.1 For dry tests, mark six rectangles (70 ± 1) mm × (50 ± 1) mm on the back of the sheet or upper. two long sides and sheets
Parallel to the direction (machine direction or ridge line direction) or in the X-axis direction of the sill (as defined in ISO 17709), the other four long sides and the above
The direction is vertical.
5.2 For the wet test, mark two rectangles (70 ± 1) mm × (50 ± 1) mm on the back of the material or upper, and place the 50 mm edge.
Consistent with the direction of the lowest peel strength (if known) in the dry test, or prepare six more rectangles as shown in 5.1.
5.3 Further marking on the material, divide the rectangular material marked in 5.1 and 5.2 into two pieces, (35 ± 0.5) mm × (50 ± 1) mm.
Mark the machine direction or X-axis direction on each small rectangular specimen. Use the arrows to mark the direction and make sure the arrows point in the same direction. Correct
For the upper face, the arrow should point to the toe.
5.4 For the damp heat aging test, two squares are required to be marked with a side length of (70 ± 1) mm and sides parallel to the X axis. Marking machine by 5.3
Arrow in the direction of the device or in the direction of the X axis.
Note. It is recommended to use the chamfer method for marking because the wet or damp heat aging treatment can make the mark imprint fade.
5.5 Take the rectangle marked in 5.1 and 5.2 and the square marked in 5.4 from the sheet or the upper surface, and then cut each material into two
(30 ± 0.5) mm × (50 ± 1) mm sample, see Figure 1. After bonding with the resin rubber, each piece of material is subsequently cut into two layers
From the sample. Some types of shoes may not be cut to the specified size, in which case a sample should be taken from the sample and the size can be
Reduce to (40 ± 1) mm × (50 ± 1) mm, and no further cutting according to the requirements of 5.3.
5.6 Cut (50 ± 1) mm × (70 ± 1) mm rectangular resin rubber on each piece of resin on the resin rubber according to the relevant dimensions in 5.5.
(4.7). If the radiant heater (4.5) needs to be calibrated before use, an additional one or two pieces of resin rubber should be cut.
The unit is mm
Description.
1---cut direction;
2---about 5mm;
3---stitch;
4---cut line;
5---bar paper.
Note. Samples can be taken from the upper material, the forming surface or the finished shoe.
Figure 1 sample assembly drawing
6 Test methods
6.1 Test principle
The coating of the sample is bonded to the resin rubber block with a strong adhesive. In the state where the finishing layer is still bonded to the rubber, the tensile test is used.
The force required to peel the sample from the resin rubber was measured. Wet samples and hydrolyzed samples can also be tested.
6.2 Test procedure
6.2.1 Place a strip of paper (75 ± 5) mm × (15 ± 3) mm on the finish of each side of the material cut in 5.5. will
The strips are stapled (or similar) to secure the two ends. The position of the staples is shown in Figure 1. From the four specimens of the dry test (marked arrow
Take two specimens to its long side. The direction of the paper is placed in the same direction as the arrow. On the other two specimens, the paper is placed along the opposite side.
6.2.2 If a treatment agent (4.9) can be used, it should be applied to the resin rubber cut from 5.6 according to the supplier's instructions.
The entire back.
6.2.3 Allow the resin rubber to dry completely according to the requirements of use.
6.2.4 Apply a polyurethane adhesive (4.8) to the entire back of each resin rubber according to the supplier's instructions.
6.2.5 Similarly, apply a bond to the coated side of each piece of material to be tested so that it overlaps the strip of paper.
6.2.6 The adhesive is dried for at least 1 h.
6.2.7 If the time required to heat the adhesive layer to 80 ° C ~ 90 ° C using a radiant heater is unknown, use the two additional cuts in 5.6
The time required for the rubber measurement and the temperature of the adhesive layer (4.6) were detected. If the time is greater than 15s, increase the temperature of the radiant heater or reduce it.
The distance between the heater and the resin rubber until the time is less than 15 s. Recording the time required to heat the adhesive layer to the specified temperature Ta,
Accurate to 1s.
6.2.8 Preparation of bonded assembly specimens.
6.2.8.1 Place an adhesive-coated resin rubber in a radiant heater with the bonding surface facing the heating source and heating to Ta (in seconds).
6.2.8.2 Carefully and quickly contact the bonding surface of the bonding material with the bonding surface of the resin rubber to align the edges of the two surfaces. Following
It is called an assembly sample).
6.2.8.3 Immediately place the assembled specimen onto the fast plate press (4.3) with the resin rubber side facing the rubber sheet (4.4). Assembly
The sample was applied with a pressure of (550 ± 50) kPa for a time of (15 ± 1) s.
The key point of operation is to remove the resin rubber from the heater of 6.2.8.1 to place the sample between the plate presses in 6.2.8.3.
The time should not exceed 7s.
6.2.9 Assembly specimens are placed in a standard environment as specified in ISO 18454 for a period of at least 24 h.
6.2.10 Use the shearing tool (4.11) to make 3 cuts in parallel with the 50mm side on the assembled specimen to form the middle part of the specimen.
Two strips of width (30.0 ± 0.5) mm, length (50 ± 1) mm, and two strips of outer width of about 5 mm, see Figure 1.
6.2.11 Open the unbonded area of each sample, taking care not to break the bond line and clamp it symmetrically to the tensile tester (4.1)
The unbonded resin rubber and the facing material are respectively clamped in the two clamps of the tensile machine (see Fig. 2).
Description.
1---stripe peel strength in Newtons (N);
2---average force value;
3---displacement.
Figure 2 Force-displacement diagram
6.2.12 Start the tensile testing machine, the separation speed of the clamp is (100 ± 10) mm/min, record separation type, such as.
a) adhesion failure of the base fabric layer;
b) damage to the base fabric layer;
c) deep damage of the base fabric;
d) adhesion failure between the microporous solidified layer and the outer surface coating;
e) damage between micropores or solidified layers;
f) Separation between the microporous or solidified layer and the base fabric.
If the separation occurs between the surface coating and the resin rubber, stop the test immediately (but do not need to remove the sample from the tensile machine), with the front
The sharp knife is carefully cut along the point of separation close to the coating surface so that separation occurs between the coating and the substrate material.
6.2.13 Determine the force and displacement curves on the tensile test machine.
6.2.13.1 Initial maximum force value of coating damage in Newtons.
6.2.13.2 The average force value required to separate the coating from the substrate (the average of all force values after the initial maximum force value) (see Figure 2),
The unit is Newton.
6.2.14 Repeat the test procedure of 6.21.1~6.2.13 for other dry samples.
6.2.15 For wet samples.
6.2.15.1 Select the sample with the minimum peel strength in the dry test calculated according to 7.1.1 and immerse it in water with a water temperature of (23 ± 2) °C (see
In 4.12), the time is (6.0 ± 0.5) h.
6.2.15.2 Remove each sample from the water, gently wipe off the excess water on the surface, and immediately perform the test procedures of 6.21.1 to 6.2.33.
6.2.16 If the wet heat aging sample is tested.
6.2.16.1 Two specimens were prepared according to ISO 20870 wet heat aged materials.
6.2.16.2 Cut 1 rectangular specimen (70±1) mm×(50±1)mm from each wet heat aging material, and the length and length of 50mm
The direction of the lowest peel strength in the dry test calculated in 7.1.2 is consistent.
6.2.16.3 Repeat the test procedure of 6.2.1~6.2.13 for the other two damp heat aging samples.
7 test results
7.1 For each sample, calculate.
7.1.1 The initial maximum peel force value measured in 6.2.13.1 is divided by the width of the sample to obtain the initial maximum peel strength in
The cow is accurate to 0.1 N/mm per millimeter (N/mm).
7.1.2 The average force value measured in 6.2.13.2 is divided by the width of the sample to obtain the average peel strength in units of cattle per millimeter (N/mm), accurate
To 0.1 N/mm.
7.2 For each stripping direction, calculate.
7.2.1 The arithmetic mean of the initial maximum peel strength calculated in 7.1.1.
7.2.2 The arithmetic mean of the average peel strength calculated in 7.1.2.
8 test report
The test report should include the following.
a) Type of sample.
---Pretreatment, wetting or damp heat aging;
--- peeling direction;
--- The arithmetic mean of the initial maximum peel strength is performed in accordance with 7.2.1;
--- The arithmetic mean of the average peel strength is performed in accordance with 7.2.2;
b) if the shoe or upper is tested, describe the style of the shoe, including the item number;
c) description of the material, including known business information, if possible;
d) the number of this part;
e) the date of the test;
f) Any deviation from this test method.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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