GB/T 22756-2017 (GB/T 22756-2008) PDF English
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GB/T22756‐2008
Wayne Zheng et al.
GB
ICS 61.060
Y 7.8
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Leather Sandals
皮凉鞋
Issued on: DECEMBER 30, 2008
Implemented on: SEPTEMBER 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Product Classification... 5
4 Technical Requirements... 5
5 Inspection Methods... 10
6 Inspecting Rules... 12
7 Packaging, Transportation and Storage... 14
Appendix B (Informative) After-Sale Quality Judgment of Leather Sandals... 18
Foreword
This standard is formulated based on the previous industry standard QB/T 2307-199 "Leather
Sandals". Compared with QB/T 2307- 1997, the main changes are as follows.
- The application scope was specified;
- The recommended thickness value of main position was deleted;
- The appearance quality was changed into sensory quality. And some inspection items
were added, deleted and modified;
- The index of physical and mechanical properties was adjusted;
- The color fastness to rubbing of lining and insole was added;
- Quantity limitation of limited substance was added;
- Prohibitive provisions about defects which might affect wearing were added into the
technical requirements.
Appendix A of this standard is normative, and Appendix B is informative.
This standard was proposed by China National Light Industry Council.
This standard shall be under the jurisdiction of National Technical Committee on Shoes of
Standardization Administration Leather Shoes Technical Committee (SAC/TC 305/SC 1).
Drafting organizations of this standard. China Leather and Footwear Industry Research
Institute, New Belle Footwear (Shenzhen) Co., Ltd., Fulin Shoes Industrial Co., Ltd., Foshan
Saturday Shoes Co., Ltd, and QingDao Hengda Co., Ltd.
Chief drafting staffs of this standard. Qi Xiaoxia, Zhang Weijuan, Song Xiaowu, Lin Heshi,
Li, Shan Cunli, and Gao Shanfang.
Since the implementation date of this standard, the previous light industry standard QB/T
2307-1997 "Leather Sandals" shall be abolished.
Leather Sandals
1 Scope
This standard specifies the technical requirements, test methods, inspection rules, packing,
transportation and storage of leather sandals which are made of natural leather, artificial
leather, synthetic leather, textiles or multiple materials upper; and which are manufactured by
processes of gluing, sewing, mould pressing, vulcanizing, injection molding and grouting etc.
This standard is applicable to the leather sandals for general wearing.
For sandals with uppers made of textiles or other materials and sandals manufactured by
equivalent process, it may also take this standard as reference.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute
provisions of this standard. For dated reference, subsequent amendments to (excluding
content of correction), or revisions of, any of these publications do not apply. However, all
parties coming to an agreement according to this standard are encouraged to study whether
the latest edition of these documents is applicable. For undated references, the latest edition of
the normative document is applicable to this standard.
GB/T 230.1 Metallic Rockwell Hardness Test-Part 1.Test method (A, B, C, D, E, F, G, H,
K, N, T) (GB/T 230.1-2004, ISO 6508-1.1999, MOD)
GB/T 532 Rubber, Vulcanized or Thermoplastic-determination of Adhesion to Textile
Fabric (GB/T 532-2008, ISO 36.2005, IDT)
GB/T 2912.1 Textiles--Determination of Formaldehyde--Part 1.Free and Hydrolyzed
Formaldehyde (Water Extraction Method)
GB/T 3293 Chinese Shoe Sizing and Last Systems
GB/T 3293.1 Shoe Sizes (GB/T 3293.1-1998, idt ISO 9407.1991)
GB/T 3903.1 General Test Method for Footwear-Test Method of Flexing Resistance
GB/T 3903.1 General Test Method for Footwear-Test Method of Abrasion Resistance
GB/T 3903.3 General Test Method for Footwear-Test Method of Peeling Strength
GB/T 3903.4 General Test Method for Footwear-Test Method of Hardness
GB/T 3903.5 General Test Method for Footwear-Test Method of Appearance
GB/T 11413 Test Method for Bond Strength of Leather Shoe Heels
GB/T 17592 Textiles-Determination of the Banned Azo Colourants
GB/T 19941 Leather and Fur-Chemical Tests-Determination of Formaldehyde Content
(GB/T 19941-2005, ISO/TS 17226.2003, MOD)
GB/T 19942 Leather and Fur-Chemical Tests-Determination of Banned Azo Colourants
(GB/T 19942-2005, ISO/TS 17234.2003, MOD)
QB/T 1472 Flexing Index of Shoes Fibreboard
QB/T 1813 Test Methods for Longitudinal Rigidity of Leather Shoes Shanks (QB/T
1813-2000, eqv BS 5131/4.18.1995)
QB/T 1917 Shanks for Leather Footwear
QB/T 2673 Leather Shoes -- Rules for Determination of the Suitability
QB/T 2882-2007 Footwear-Test Methods for Uppers Linings and Insocks-colour
Fastness to Rubbing
3 Product Classification
According to wearing objects, it can be classified into male and female sandals.
According to style, it can be classified into belt loop style, close toe & close back style,
hollow, front-hollow, and back-hollow style, etc.
According to the upper materials, it can be classified into natural leather (top layer leather and
split leather), artificial leather, synthetic leather, textiles, and multiple materials sandals.
4 Technical Requirements
4.1 General Requirements
4.1.1 The shoe size shall meet the requirements of GB/T 3293.1.
4.1.2 The shoe last size shall meet the requirements of GB/T 3293.
4.1.3 The product marking shall meet the requirements of QB/T 2673.
4.2 Sensory quality requirements
Sensory quality requirements are shown in Table 1, No. 1~5 of the table are main items while
No. Item Superior products Qualified product
1.5mm and width tolerance is 1.0mm.
8 Upper size
The front upper (upper band) length
tolerance of the same pair of shoes is
1.5mm while the back upper height (upper
band length) tolerance is 2.0mm.
The front upper (upper band) length tolerance of the
same pair of shoes is 1.5mm while the back upper
height (upper band length) tolerance is 2.5mm.
9 Folding edge along the mouth Basically regular, uniform and smooth, without exposed notch and gape
10 Outsole thickness
The thickness of forefoot action position shall not be less than 3.0mm when the figure has been
deducted while the heel action position shall not be less than 5.0mm
11 Accessory
Assembled firmly and basically symmetric. Uniform in color and lustre and without obvious sensory
defects. The surfaces of metal pieces shall be smooth and without sharp edge and sharp tip. Zippers
shall be smooth and both ends of the zipper shall free from rags
Note 1.if the outsole length tolerance of shoes of same pair exceeds 4.0mm and width tolerance exceeds 3.0mm, the shoes
belong to serious defects.
Note 2.if the toe upper (upper band) length tolerance of shoes of same pair exceeds 4mm while the back counter height (upper
band length) tolerance exceeds 4mm, it belongs to serious defects.
4.3 Requirements of physical and mechanical properties index
4.3.1 Flexing resistance
4.3.1.1 Test conditions. Pre-cut of 5mm and continuously folding for 40000 times.
4.3.1.2 Technical index. The crack length of superior products folded-cuts shall be less than
or equal to 10.0mm. New cracks shall not be available after folded. After folded, crazing of
leather, broken grain or upper sole chip shall not appear on the upper. Crack length of the
qualified products folded cuts shall be less than or equal to 20.0mm. Length of new cracks
after folded shall be less than or equal to 5.0mm and shall not be more than 3 places. The
folded upper shall free from crazing of leather, broken grain or upper sole chip.
4.3.1.3 40000 times of flexing tests without cuts shall be carried out on the natural leather
outsole. Single crack shall not be greater than 5mm and the number shall not be more than 3.
4.3.1.4 Flexing resistance can be omitted under the conditions of shoe size less than 230mm
or the thickness of folding position greater than 25mm.
4.3.2 Abrasion resistance
4.3.2.1 Test conditions. Impose a pressure of 4.9N and keep a continuous abrasion for
20min.
4.3.2.2 Technical index. Superior products shall be less than or equal to 10.0mm while the
qualified products shall be less than or equal to 14.0mm.
4.3.2.3 The abrasion resistance is not applicable to natural leather outsole.
Note. As for footwear products, materials of the insole, inner-pad and lining which directly contact with foot are Category B; and
the materials of upper and outsole and so on are Category C. However, under the conditions that shoes have no lining, outsole
has no insole, the upper or outsole has a direct contact with foot, then the materials of...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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