GB/T 38035-2019 English PDF

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GB/T 38035-2019: Footwear - Test method for slide fasteners - Attachment strength of end stops
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38035-2019	184	Add to Cart	3 days	Footwear - Test method for slide fasteners - Attachment strength of end stops	Valid

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Basic data

Standard ID: GB/T 38035-2019 (GB/T38035-2019)
Description (Translated English): Footwear - Test method for slide fasteners - Attachment strength of end stops
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y78
Classification of International Standard: 61.060
Word Count Estimation: 10,194
Date of Issue: 2019-10-18
Date of Implementation: 2020-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38035-2019: Footwear - Test method for slide fasteners - Attachment strength of end stops

---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 method for slide fasteners - Attachment strength of end stops ICS 61.060 Y78 National Standards of People's Republic of China Test method for footwear zippers 2019-10-18 released 2020-05-01 Implementation State Administration for Market Regulation Issued by China National Standardization Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this standard is equivalent to ISO 10750.2015 "Test Method for Footwear Zipper End Bond Strength". The Chinese documents that have consistent correspondence with the normatively cited international documents in this standard are as follows. ---GB/T 2703-2017 Footwear Terminology (ISO.19952.2005, NEQ) ---GB/T 16825.1-2008 Inspection of static uniaxial testing machine Part 1.Tensile and (or) pressure testing machine force measuring system Inspection and calibration (ISO 7500-1.2004, IDT) ---GB/T 22049-2019 Footwear and footwear components environmental regulation and test standard environment (ISO 18454.2018, IDT) This standard has made the following editorial changes. ---The ISO.19952 cited in Chapter 3 is added to the normative references. 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 standard was proposed by the China National Light Industry Council. This standard is under the jurisdiction of the National Footwear Standardization Technical Committee (SAC/TC305). Drafting organizations of this standard. China Leather and Footwear Research Institute Co., Ltd., Dalian Product Quality Inspection and Testing Research Institute Co., Ltd., Jihua San 515 Leather Shoes Co., Ltd. The main drafters of this standard. Yan Hongwei, Guo Li, Zhou Sujing, Wang Peng, Niu Jinhui. Test method for footwear zippers

1 Scope

This standard specifies the test method for the combined strength of the top stop and bottom stop of a zipper. This standard applies to all kinds of zippers for shoes.

2 Normative references

The 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 system ISO 18454 Footwear, footwear and footwear components, environmental regulation and test standard environment ISO.19952 Footwear Terminology

3 Terms and definitions

The following terms and definitions defined in ISO.19952 apply to this document. 3.1 zipper The connecting piece that fixes two pieces of flexible material is composed of interlockable elements attached to the opposite edges of the two cloth belts and movable across the elements. Composed of a movable slider, when the slider moves in one direction, the chain teeth on the two cloth belts can be meshed with each other. When the slider moves in the opposite direction, the chain teeth can be separated. 3.2 Cloth tape Textile belt used to carry fastener elements and other zipper components. 3.3 Pull head When sliding on the chain, the chain teeth are meshed or pulled apart. 3.4 Pull tab Plastic or metal sheet attached to the slider for easy pulling. 3.5 Chain teeth They can be engaged with each other and are unique parts of zippers or plastic continuous spiral chains. 3.6 The start or end component of the tooth chain prevents the slider from being detached from the tooth chain belt. 3.7 Tooth chain belt The textile cloth belt fixed with chain teeth can be connected with another cloth belt through the chain teeth.

4 Principle

4.1 General This standard describes the following test methods. 4.2 Method 1-Top-stop binding force The slider of the closed zipper is clamped in one clamp of the tensile testing machine, and the bottom stop of the zipper is clamped in the other clamp. Then move the points From the clamp, measure the force required for the top stop to detach from the zipper. 4.3 Method 2-Bottom stop binding strength (pull head-tooth chain method) The slider of the open zipper is clamped in one clamp of the tensile testing machine, and the two free ends of the tooth chain are clamped in the other clamp. Then move the separating clamp to measure the force required for the bottom stop to break away from the zipper. 4.4 Method 3-Bottom stop binding strength (tooth chain belt-tooth chain belt method) Fix the free end of the tooth chain of the open zipper on the two clamps of the tensile testing machine. Then move the separation clamp to measure the bottom stop The force required to separate the zipper.

5 Test equipment and materials

5.1 Tensile testing machine. 5.1.1 Clamp, separation speed (100 ± 10) mm/min. 5.1.2 The measuring force range is up to 1kN, and the accuracy is greater than 2%, which meets the secondary requirements in ISO 7500-1. 5.1.3 A device that records the maximum tensile force during the test or the tensile force during the entire test. 5.2 For methods 1 and 2, the small hook is suitable for the upper clamp of the tensile testing machine (5.1). The thickness of the hook should be small enough to pass through the zipper under test Hole in the film. The hook can be made of steel wire with a diameter of (1.6±0.2) mm.

6 Test sample

Each test requires 3 zippers. Before the test, adjust the sample for 24h according to ISO 18454, and conduct the test in the same environment.

7 steps

There are 3 test methods available. 7.1 Method 1-Top-stop binding force 7.1.1 Fix the hook (5.2) on the upper clamp of the tensile testing machine (5.1), and clear the force measurement system (5.1.2). 7.1.2 Close the zipper so that the slider is in contact with the top stop. 7.1.3 Pass the small hole on the zipper pull tab through the hook (5.2). 7.1.4 Clamp the zipper in the lower clamp of the tensile testing machine. If possible, the zipper should be clamped about 75mm below the slider. if needed, You can cut off the excess chain straps. 7.1.5 Turn on the recording system (5.1.3) of the tensile testing machine. 7.1.6 Start the tensile testing machine and separate the clamps at a separation speed of (100 ± 10) mm/min until the zipper is damaged. 7.1.7 Record the maximum force value, the unit is Newton, and record the type of zipper damage, such as. end pull out, pull tab separation, pull tab damage. 7.1.8 Repeat the steps from 7.1.2 to 7.1.7 for the remaining two zippers. 7.1.9 Record the three maximum force values according to step 7.1.7 and calculate their arithmetic average. 7.2 Method 2-Bottom stop binding strength (chain strap-pull method) 7.2.1 Fix the hook (5.2) on the upper clamp of the tensile testing machine (5.1), and clear the force measuring system (5.1.2). 7.2.2 Open the zipper so that the slider is in contact with the bottom stop. If the slider has a locking device, adjust it to the closed position so that the slider can slide freely. 7.2.3 Pass the small hole on the open zipper pull tab through the hook (5.2). 7.2.4 Clamp the two free ends of the tooth chain strap to the lower clamp of the tensile testing machine. If possible, the fastener tape should be clamped about 75mm from the slider Place. If necessary, you can cut off the excess chain strap. 7.2.5 Follow the steps from 7.1.5 to 7.1.7. 7.2.6 Repeat the steps from 7.2.2 to 7.2.5 for the remaining two zippers. 7.2.7 Record the three maximum force values according to step 7.1.7 and calculate the arithmetic average. 7.3 Method 3-Bottom stop binding strength (tooth chain belt-tooth chain belt method) 7.3.1 Open the zipper so that the slider is in contact with the bottom stop. If the slider has a locking device, adjust it to the closed position so that the slider can slide freely. 7.3.2 Clamp the two free ends of the fastener chain in each clamp of the tensile testing machine. If possible, the chain strap between the clamp and the 100mm. If necessary, you can cut off the excess chain strap. 7.3.3 Follow the steps from 7.1.5 to 7.1.7. 7.3.4 Repeat the steps from 7.3.1 to 7.3.3 for the remaining two zippers. 7.3.5 Record the three maximum force values according to step 7.1.7 and calculate their arithmetic average.

8 Test report

The test report should contain the following information. a) Number of this standard; b) A detailed description of the test sample; d) The test method used. Method 1, Method 2 or Method 3; e) The arithmetic average of the maximum force and the type of damage; f) Any deviation from this test method. ......

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