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This part is developed in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 3903.43-2008 Footwear - Test methods for uppers, lining and insocks - Seam strength, and the following main technical changes have been made with respect to GB/T 3903.43-2008:
——The normative references are modified (see Clause 2, Clause 2 of Edition 2008);
——Requirements on the accuracy of the force value measured by the tensile testing machine are added (see 4.1.1 and 4.2.1);
——The force range adapted to the test specimen is modified (see 4.2.1; 4.2.1 of Edition 2008).
This part, by means of translation, is identical to ISO 17697: 2016 Footwear - Test methods for uppers, lining and insocks - Seam strength.
The Chinese documents identical to the normative international documents given in this part are as follows:
——GB/T 16825.1-2008 Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification and calibration of the force-measuring system (ISO 7500-1: 2004, IDT)
——GB/T 22049-2019 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear (ISO 18454: 2018, IDT)
——GB/T 22050-2008 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces (ISO 17709: 2004, IDT)
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This part was proposed by China National Light Industry Council.
This part is under the jurisdiction of SAC/TC 305 National Technical Committee on Footwear of Standardization Administration of China.
The previous edition of the standard replaced by this part is as follow:
——GB/T 3903.43-2008.
Footwear - Test methods for uppers, lining and insocks - Seam strength
1 Scope
This part of GB/T 3903 specifies two test methods for determining the seam strength of uppers, lining or insocks, in order to assess the suitability for the end use.
This part is applicable to uppers, lining or insocks of various materials.
These methods are as follows:
——Method A: Needle perforations. For determining the force required to pull a row of needles through an upper material, in a direction perpendicular to the row.
——Method B: Stitched seams. For determining the breaking strength of stitched seams in shoe upper and lining materials. This method is applicable to seams cut from shoes or made up to simulate footwear constructions.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 7500-1 Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system
ISO 17709 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces
ISO 18454 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
seam strength
breaking strength of a stitched seam as determined under specified conditions using a tensile testing machine
3.2
upper
materials forming the outer face of the footwear which is attached to the sole assembly and covers the upper dorsal surface of the foot
Note: In the case of boots, this also includes the outer face of the material covering the leg. Only the materials that are visible are included, no account should be made of underlying materials.
3.3
complete upper assembly
finished upper, fully seamed, joined or laminated as appropriate, comprising the center material and any lining(s) together with all components such as interlinings, adhesives, membranes, foams or reinforcements, but excluding toe puffs and stiffeners
Note: The complete upper assembly can be flat, 2-dimensional or comprise lasted upper in the final footwear.
4 Apparatus and material
The following apparatus and material shall be used.
4.1 Method A
4.1.1 Tensile testing machine, with a jaw separation rate of (100 ± 10) mm/min, a force range appropriate to the specimen under test (this will usually be less than 500 N for footwear upper materials), capable of measuring forces to an accuracy greater than 2 % as specified by Class 2 in ISO 7500-1.
4.1.2 Needle holding jig, see Figure 1, including the following:
4.1.2.1 Two rectangular rigid plates, each of minimum width 30 mm and maximum thickness 6 mm. Each of the two plates is drilled with 17 holes of diameter (1.1 ± 0.1) mm. The holes shall be in a straight line parallel to and approximately 5 mm from one end of the plate. The holes should be evenly spaced so that the centers of the two extreme holes are (26.5 ± 0.5) mm apart.
4.1.2.2 One spacing plate, of width similar to the drilled plates and of thickness (3.5 ± 0.5) mm.
4.1.2.3 Means of securing the spacing plate, to the surface of one of the drilled plates such that the distance between the end of the spacing plate and the center line of the row of holes in the other plate can be adjusted and set at (3.0 ± 0.1) mm and (6.0 ± 0.2) mm. The combination will be referred to as the lower plate.
4.1.2.4 Means of securing the other drilled plate, which will be referred to as the upper plate, to the exposed surface of the spacing plate so that the holes in both of the drilled plates are aligned.
The end of one of the plates furthest from the row of holes should have means of attachment to one of the jaws of the tensile testing machine so that the rows of holes are perpendicular to the axis of the machine.
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Apparatus and material 5 Sampling and conditioning 6 Test methods 7 Test results 8 Test report Bibliography
ICS 61.060 Y 78 中华人民共和国国家标准 GB/T 3903.43—2019/ISO 17697:2016 代替GB/T 3903.43—2008 鞋类 帮面、衬里和内垫试验方法 缝合强度 Footwear—Test methods for uppers,lining and insocks— Seam strength (ISO 17697:2016,IDT) 2019—08—30发布 2020—03—01实施 国家市场监督管理总局 中国国家标准化管理委员会 发布 前言 本部分按照GB/T 1.1—2009给出的规则起草。 本部分代替GB/T 3903.43—2008《鞋类 帮面、衬里和内垫试验方法 缝合强度》,与GB/T 3903.43—2008相比,主要技术变化如下: ——修改了规范性引用文件(见第2章,2008年版的第2章); ——增加了对拉力试验机测量力值精度的要求(见4.1.1和4.2.1); ——修改了与试样相适应的力值范围(见4.2.1,2008年版的4.2.1)。 本部分使用翻译法等同采用ISO 17697:2016《鞋类 帮面、衬里和内垫试验方法 缝合强度》。 与本部分中规范性引用的国际文件有一致性对应关系的我国文件如下: ——GB/T 16825.1—2008静力单轴试验机的检验 第1部分:拉力和(或)压力试验机测力系统的检验与校准(ISO 7500-1:2004,IDT) ——GB/T 22049—2019 鞋类 鞋类和鞋类部件环境调节及试验用标准环境(ISO 18454:2018,IDT) ——GB/T 22050—2008鞋类 样品和试样的取样位置、准备及环境调节时间(ISO 17709:2004,IDT) 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别这些专利的责任。 本部分由中国轻工业联合会提出。 本部分由全国制鞋标准化技术委员会(SAC/TC 305)归口。 本部分所代替标准的历次版本发布情况为: ——GB/T 3903.43—2008。 鞋类 帮面、衬里和内垫试验方法 缝合强度 1 范围 GB/T 3903的本部分规定了测定帮面、衬里和内垫的缝合强度的两种试验方法,目的是评估其最终用途的适宜性。 本部分适用于各种材料的帮面、衬里和内垫。 两种试验方法为: ——方法A:针孔。测定将一排针从帮面材料上拉出所需要的力,施加力的方向与针列垂直。 ——方法B:缝线。测定帮而和衬里材料缝线的撕裂力。本方法适用于从鞋上剪切下来的缝线部位或制成模拟缝合试样。 2规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。 ISO 7500-1金属材料 静态单轴向试验机的校准和检验 第1部分:拉力和(或)压力试验机 测力系统的校准和检验(Metallic materials—Calibration and verification of static uniaxial testing ma-chines—Part 1:Tension/compression testing machines—Calibration and verification of the force-meas-uring system) ISO 17709鞋类 样品和试样的取样位置、准备及环境调节时间(Footwear—Sampling location,preparation and duration of conditioning of samples and test pieces) ISO 18454 鞋类 鞋类和鞋类部件环境调节及试验用标准环境(Footwear—Standard atmospheres for conditioning and testing of footwear and components for footwear) 3术语和定义 下列术语和定义适用于本文件。 3.1 缝合强度seam strength 在规定条件下,使用拉力试验机测定缝线缝合的断裂强度。 3.2 帮面upper 鞋类外表面材料,与鞋底部件结合,覆盖脚背。 注:对于靴类产品,帮面还包括包裹腿的外面部分。只包括可见的材料,不考虑衬里等不可见材料。 3.3 成型帮面complete upper assembly 通过适当的方法,对帮面进行缝制、粘合或层压组合装配而成,包括中间材料和所有衬里连同部件,例如夹衬、胶粘剂、覆膜、泡沫或补强材料,但不包括包头和主跟。 注:成型帮面包括未绷帮和已绷帮的帮面。 4仪器设备和材料 应使用以下试验设备和材料: 4.1 方法A 4.1.1 拉力试验机,夹具钳的移动速度为(100±10)mm/min,与试样相适应的试验力值范围(对鞋帮面材料通常小于500 N),符合ISO 7500-1的2级要求,力值测量精度大于2%。 4.1.2针列夹具,见图1,包括以下部分: 4.1.2.1 两块矩形硬质板,每块板的宽度至少为30 mm,厚度最大为6 mm。每块板上均钻有17个孔,其直径为(1.1±0.1)mm。孔列与板的一边平行并保持大约5 mm的距离。孔等距排列,距离最远的两个孔心相距为(26.5±0.5)mm。 4.1.2.2隔板,宽度与钻孔板的宽度大致相等,厚度为(3.5±0.5)mm。 4.1.2.3 隔板固定到一个钻孔板上,隔板端头与钻孔板上的孔的直线距离可以调节到(3.0±0.1)mm和(6.0±0.2)mm。隔板和钻孔板组成底板。 4.1.2.4另外一块钻孔板固定到隔板另一面上,作为面板,两块钻孔板上的孔对齐。 板离孔较远的一端固定到拉力试验机的夹具钳上,孔形成的直线与拉力机轴线垂直。