GB/T 3903.43-2019 English PDFUS$264.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 3903.43-2019: Footwear - Test methods for uppers, lining and insocks - Seam strength Status: Valid GB/T 3903.43: Historical versions
Basic dataStandard ID: GB/T 3903.43-2019 (GB/T3903.43-2019)Description (Translated English): Footwear - Test methods for uppers, lining and insocks - Seam strength Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y78 Classification of International Standard: 61.060 Word Count Estimation: 14,136 Date of Issue: 2019-08-30 Date of Implementation: 2020-03-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 3903.43-2019: Footwear - Test methods for uppers, lining and insocks - Seam strength---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Footwear - Test methods for uppers, lining and insocks - Seam strength ICS 61.060 Y78 National Standards of People's Republic of China Replace GB/T 3903.43-2008 Footwear uppers, linings and insoles test methods seam strength 2019-08-30 released 2020-03-01 Implementation State Administration for Market Regulation Issued by China National Standardization Administration ForewordThis section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 3903.43-2008 "Test Methods for Suture Strength of Footwear Uppers, Linings, and Insoles", and is in line with GB/T 3903.43- Compared with.2008, the main technical changes are as follows. ---Modified normative reference documents (see Chapter 2, Chapter 2 of the.2008 edition); ---Added the requirements for the accuracy of the measured force value of the tensile testing machine (see 4.1.1 and 4.2.1); --- Modified the force range suitable for the sample (see 4.2.1, 4.2.1 of the.2008 edition). The translation method used in this section is equivalent to ISO 17697.2016 "Test Methods for Suture Strength of Footwear Uppers, Linings and Insoles". The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows. ---GB/T 16825.1-2008 Inspection of static uniaxial testing machine Part 1.Inspection and calibration of force measuring system of tensile and (or) compression testing machine (ISO 7500-1.2004, IDT) ---GB/T 22049-2019 Footwear and footwear components environmental regulation and test standard environment (ISO 18454.2018, IDT) ---GB/T 22050-2008 Footwear samples and sampling location, preparation and environmental adjustment time of samples (ISO 17709.2004, IDT) Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This part was proposed by the China National Light Industry Council. This part is under the jurisdiction of the National Footwear Standardization Technical Committee (SAC/TC305). This section was drafted by. Sanliuyidu (China) Co., Ltd., China Leather and Footwear Research Institute Co., Ltd. The main drafters of this section. Su Lihua, Zhang Weijuan, Ran Meiling. The previous versions of the standards replaced by this part are as follows. ---GB/T 3903.43-2008. Test methods for uppers, linings and insoles of footwear Stitch strength1 ScopeThis part of GB/T 3903 specifies two test methods for determining the suture strength of uppers, linings and inner pads. Suitability for end use. This section applies to the upper, lining and inner pad of various materials. The two test methods are. ---Method A. Pinhole. Measure the force required to pull a row of needles from the top material, and the direction of force applied is perpendicular to the needle row. ---Method B. Suture. Measure the tearing force of the suture of the upper and lining material. This method is suitable for suture parts cut from shoes or making simulated suture samples.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO 7500-1 Calibration and Inspection of Static Uniaxial Testing Machines for Metallic Materials Part 1.Tensile and/or Compression Testing Machines Calibration and inspection of force measurement system3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Stitch strength Under specified conditions, use a tensile testing machine to determine the breaking strength of the suture. 3.2 Help noodles The outer surface material of the footwear is combined with the sole components to cover the instep. Note. For boots, the upper also includes the outer part of the wrapped leg. Only visible materials are included, and invisible materials such as linings are not considered. 3.3 Forming surface Through appropriate methods, the upper is sewn, glued or laminated and assembled, including intermediate materials and all linings and components. For example, lining, adhesive, film, foam or reinforcing material, but not including toe cap and main heel. Note. The forming upper includes unstretched and stretched uppers.4 Equipment and materialsThe following test equipment and materials should be used. 4.1 Method A 4.1.1 For the tensile testing machine, the moving speed of the clamp clamp is (100±10) mm/min, and the test force value range suitable for the sample (for the upper surface) The material is usually less than 500N), in line with ISO 7500-1 level 2 requirements, and the force measurement accuracy is greater than 2%. 4.1.2 Needle row fixture, see Figure 1, including the following parts. 4.1.2.1 Two rectangular rigid boards, each with a width of at least 30mm and a maximum thickness of 6mm. There are 17 holes drilled on each board, Its diameter is (1.1±0.1) mm. The hole row is parallel to one side of the board and keeps a distance of about 5mm. The holes are arranged equidistantly, the two farthest The distance between the holes is (26.5±0.5)mm. 4.1.2.2 The width of the partition plate is approximately equal to that of the drilled plate, and the thickness is (3.5 ± 0.5) mm. 4.1.2.3 The partition is fixed to a drilling plate, and the linear distance between the end of the partition and the hole on the drilling plate can be adjusted to (3.0±0.1) mm and (6.0±0.2)mm. The partition plate and the drilling plate constitute the bottom plate. 4.1.2.4 Another drilling plate is fixed to the other side of the partition as a panel, and the holes on the two drilling plates are aligned. The end of the plate farther from the hole is fixed to the clamp clamp of the tensile testing machine, and the straight line formed by the hole is perpendicular to the axis of the tensile testing machine. 4.1.3 17 needles, round needles, metric 90 (number 14). 4.1.4 Die knives or other knives that can take T-shaped specimens. The specifications and dimensions of T-type specimens are shown in Figure 2. 4.2 Method B 4.2.1 For the tensile testing machine, the moving speed of the clamp clamp is (100±10) mm/min, and the force value range suitable for the sample (usually greater than 2kN), in line with ISO 7500-1 level 2 requirements, force measurement accuracy is greater than 2%. 4.2.2 Small sharp knife or scissors for sampling. 4.2.3 If the stitching sample is taken from the forming surface for the test, a die cutter with a size of (50 ± 2) mm × (50 ± 2) mm sample is selected. 4.2.4 If you use a simulated suture sample to test, use a sewing machine and other auxiliary tools.5 Sampling and environmental adjustment5.1 Method A 5.1.1 Place the shoe, sheet or upper in a standard environment that meets the requirements of ISO 18454 for environmental adjustment for at least 24 hours. The test is also carried out in this environment. 5.1.2 Take 6 samples with dimensions shown in Figure 2.The T-shaped bottom edge of three samples is parallel to the direction of the material (leather is the direction of the ridge line, Non-leather samples are selvedge (warp) or machine direction]. The other three samples are perpendicular to it. When the lining material and the upper material are permanently bonded together, samples are taken from the formed upper material. When sampling from raw materials, take samples from the available length and width of the sheet. For samples containing woven structural materials, avoid two samples having the same warp or weft. When sampling from the upper surface, it should not include any perforated area, and the T-shaped bottom edges of the three samples are parallel to the X-axis direction of the upper surface (according to ISO 17709), the other three samples are perpendicular to the X axis. When sampling from certain types of shoes, the size of the shoes may not meet the specifications of the sample (especially children's shoes). At this time, the The size cannot be reduced. If a sample of the appropriate size cannot be obtained from the upper, the raw material is tested. 5.1.3 Mark the direction on each sample. 5.2 Method B 5.2.1 Place the shoes, sheets or uppers in a standard environment that meets the requirements of ISO 18454 for environmental adjustment for at least 24 hours. The test is also carried out in this environment. 5.2.2 Sampling from the finished shoe or upper. 5.2.2.1 If possible, use a knife (4.2.2) to take two rectangular specimens from the upper surface, the size of which is (90±10)mm×(50±2)mm, Including the lining material used, the suture should be in the middle of the sample (see Figure 3). 5.2.2.2 If the upper surface is too small for sampling, the size of the sample can be reduced, but the width of the middle part should not be less than 10mm, see 5.2.2.3 and Figure 3. 5.2.2.3 Make an incision at a distance of 3 mm from the suture line. The incision is parallel to the long side of the sample and reaches the end of the short side of the material. The middle width of the sample is (25±0.5)mm, and the width of the two sides is (12.5±0.5)mm (see Figure 3). 5.2.3 Prepare a simulated suture sample. 5.2.3.1 Use a small sharp knife, scissors (4.2.2) or die knife (4.2.3) to sample. The size of each material used in the suture sample is (50±2)mm×(50±2)mm. The amount of material is related to the stitch structure. May be stitched together by two pieces of the same or different upper materials It may also contain one or more lining materials and may also include reinforcing tapes. Take a sufficient number of samples to ensure the completion of each direction The three stitches needed. If necessary, the sample should be chipped and polished before sewing. The test direction is horizontal or vertical, and should be perpendicular to the direction of the suture. The number of test directions depends on the structure of the upper. Press in the test Horizontal and vertical separation is enough, but in some cases, the sample can be sampled from the horizontal, vertical and diagonal directions. When sampling on non-leather materials, samples should be taken from within the available range of the length and width of the sheet. For materials containing woven structures, two Both samples have the same warp or weft. 5.2.3.2 Use a sewing machine (4.2.4) to sew the square material in each test direction, sewing three lines in each test direction. Sutures The selection of the type, needle size and type, and needle size density should be based on the finished shoe. If the above information is not available, please refer to the data in Table 1.adjust The tightness of the sewing machine thread makes the suture in the right position. 5.2.3.3 From the seam trace on each sample to a point 3mm away from the edge of the material, make a cutting line perpendicular to the seam. Make the width of the middle part of the sample (25 ± 0.5) mm, and the width of its two sides is (12.5 ± 0.5) mm (see Figure 4).6 Test method6.1 Method A 6.1.1 Principle Insert a row of needles straight through the T-shaped sample, the needle row is parallel to the bottom of the sample and the distance is fixed. By acting vertically on the outer Force, tensile specimen. Record the maximum tensile force and divide by the width of the sample to obtain the suture strength perpendicular to the pinhole. 6.1.2 Test procedure 6.1.2.1 Adjust the position of the needle row fixture (4.1.2) so that the distance between the edge of the partition and the centerline of the hole row on the other two boards is. --- Elastic and loose fabric. (6.0±0.2) mm; ---All other materials. (3.0±0.1)mm. 6.1.2.2 Insert the 17 pins (4.1.3) into the 17 holes (4.1.2.1) of the panel respectively. When inserting, the needle tip does not exceed the inner layer of the panel, and each needle The pin slot hole faces the partition. 6.1.2.3 Place a sample in the needle row fixture, the bottom of the T-shape is connected to the partition, and the center hole (4.1.2.1) of the plate is on the center line of the sample width. 6.1.2.4 Insert 17 suture needles through the sample and the holes on the other board until the needle handle cannot be inserted. Note that when the needle is inserted into the sample, Ensure that the position of the specimen and the relative position of the needle holder remain unchanged. 6.1.2.5 Clamp the needle row clamp symmetrically in the clamp clamp of the tensile testing machine, and the needle row is perpendicular to the axis of the tensile machine. Another of the rally machines The clamp clamp clamps the sample symmetrically, and the clamping length is at least 20mm. 6.1.2.6 Reset the force measuring system of the tensile testing machine to zero, start the tensile testing machine, and the moving speed of the clamp clamp is (100 ± 10) mm/min. 6.1.2.7 During the test, record the type of fracture of the specimen and the maximum tensile force applied to the clamp clamp, in Newtons, accurate to 1N. a) Tearing along the direction of the needle row; b) Take off the yarn parallel to the needle row direction; c) Tearing from each pinhole; d) Break outside the pinhole. Sometimes the sample may have multiple fracture types, record all fracture types and their corresponding numbers. 6.1.2.8 Repeat the steps from 6.1.2.3 to 6.1.2.7 for the other five samples. 6.2 Method B 6.2.1 Test principle The tensile testing machine gradually stretches the sample containing the suture, and the direction of the tensile force is perpendicular to the direction of the suture until it breaks. Find the fracture strength and fracture type. 6.2.2 Test procedure 6.2.2.1 Measure the width of the middle part of the sample to the nearest 0.5mm, and record this value as W. 6.2.2.2 Adjust the tensile testing machine (4.2.1), the clamp clamp is about 30mm apart. a) When sampling from the upper, if the lining is not glued to the back of the upper, remove the lining from the upper, and then clamp the upper on the On the clamp of the tensile testing machine. Do not expose the lining to the stitches. b) When sampling from the upper surface of the adhesive lining, clamp both the upper surface and the lining in the clamp clamp. 6.2.2.3 Clamp the middle part of the sample in the clamp pliers, the distance between the suture and each clamp pliers is 15mm, and The edges are parallel. Do not clamp the 12.5mm wide side strip to make it hang freely, see Figure 4. 6.2.2.4 Start the tensile testing machine, the moving speed of the clamp clamp is (100 ± 10) mm/min. 6.2.2.5 Record the force (breaking force) at this time when the sample breaks, in Newtons, accurate to 1N. 6.2.2.6 Mark the type of fracture. a) Material fracture at the suture; b) The suture is pulled out; c) The suture is broken; d) The material away from the suture is broken. 6.2.2.7 Repeat the steps from 6.2.2.3 to 6.2.2.5 for other samples.7 Test results7.1 Method A 7.1.1 Calculation Record the arithmetic average of the maximum values of three transverse specimens and three longitudinal specimens in 6.1.2.7. 7.1.2 For each test direction. the arithmetic mean (7.1.1) of the maximum force value is divided by the width of the sample (25mm) to obtain the value perpendicular to the pinhole Suture strength value, the unit is cattle per millimeter (N/mm). 7.2 Method B 7.2.1 Calculate the suture strength of each sample. the breaking force (6.2.2.5) divided by the width of the sample W (6.2.2.1), the unit is cattle per millimeter (N/ mm), accurate to 1N/mm. 7.2.2 For the prepared suture samples, calculate the arithmetic mean of the suture strength in each test direction (5.2.3.1).8 Test report8.1 Method A The test report should include the following. a) The stitching strength of the material in each direction shall be executed according to 7.1.2; b) The type of fracture that occurred shall be executed in accordance with 6.1.2.7; c) If the sample is a finished shoe or a molded upper, describe the style of the test shoe, including the commercial article number; d) A description of the material, including commercial information if possible; e) Description of all lining or reinforcement materials; h) Any deviation from this test method. 8.2 Method B The test report should include the following. a) Obtain the suture strength of the suture from the finished shoe, and execute it according to 7.2.1; b) For simulated suture samples, the average value of the suture strength in each test direction shall be executed according to 7.2.2; c) One or more types of fractures that have occurred shall be executed in accordance with 6.2.2.6; d) For the sewing sample cut from the shoe, generally describe the stitching structure and commercial article number of the shoe; e) For the finished sewing sample, describe the suture structure in detail, including the type of suture, material type (including commercial information), suture type and Specifications, any thin or reinforced details; g) test date; h) Any deviation from this test method. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 3903.43-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 3903.43-2019_English as soon as possible, and keep you informed of the progress. 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