Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
The standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Leather of Standardization Administration of China (SAC/TC 252).
This standard is issued as first edition.
Case and Bag Leather
1 Scope
This standard specifies the requirements, grading, test methods, inspection rules, acceptance, packaging, marking, transportation and storage of case and bag leather.
This standard is applicable to various case and bag leathers (excluding transfer coating leather).
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 normative document (including any amendments) applies.
GB/T 19941 Leather and Fur - Chemical Tests - Determination of Formaldehyde Content
GB/T 19942 Leather and Fur - Chemical Tests - Determination of Banned Azo Colourants
GB/T 22886 Leather - Tests for Colour Fastness - Colour Fastness to Water Spotting
GB/T 22889 Leather - Physical and Mechanical Tests - Determination of Surface Coating Thickness
GB/T 30398 Leather and Fur - Chemical Tests - Determination of Allergenic Disperse Dyestuffs
GB/T 30399 Leather and Fur - Chemical Tests - Determination of Carcinogenic Dyestuffs
QB/T 2537 Leather - Tests for Colour Fastness - Colour Fastness to Cycles of To-and-fro Rubbing
QB/T 2710 Leather - Physical and Mechanical Tests - Determination of Tensile Strength and Percentage Extension
QB/T 2714 Leather - Physical and Mechanical Tests - Determination of Flex Resistance
QB/T 2724 Leather - Chemical Test - Determination of pH
QB/T 2725 Leather - Determination of Odour
QB/T 2727-2017 Leather - Tests for Color Fastness. Color Fastness to Artificial Light: Xenon Art Fading Lamp Test
QB/T 2801 Leather - The Rules of Examination for Acceptance Packing Marking Transportation and Conservation
QB/T 4198 Leather - Physical and Mechanical Tests - Determination of Tear Load: Single Edge Tear
3 Requirements
3.1 Physical and chemical properties
It shall meet the requirements specified in Table 1.
Table 1 Physical and Chemical Properties
Item Index
Tear load/N ≥ 15
Elongation under the specified load/% (specified load 10N/mm2) ≤ 60
Folding fastness of coating Free of crack after folding for 10000 times
Odor/grade ≤ 3
pH 3.5~6.0
Diluted difference of pH (when pH value is less than 4.0, inspect the diluted difference) ≤ 0.7
It shall meet the requirements specified in Table 2.
Table 2 Color Fastness
Item Category
No-finishing and light-finishing leather Heavy-finishing leather Suede leather
Coating thickness/μm ≤20 >20 -
Color fastness to rubbing /grade Dry rubbing ≥ 3 3/4 3
Wet rubbing ≥ 2/3 3 2
Color fastness to light /grade ≥ 3 4 3
Color fastness to water stain /grade ≥ 3 (except suede leather)
3.3 Sensory requirements
3.3.1 The whole piece of leather has basically uniform thickness, the leather is flat and free of greasy feeling; soft leather is soft, plump and elastic.
3.3.2 There are no broken grain and pipey and the primary parts shall be free from loose grain.
3.3.3 The finishing of finished leather is uniform, the coating is in firm adhesion and free of decoating and crazing. The fluff of suede leather is uniform and the color is basically consistent.
4 Grading
After the product passes the inspection, the grading is carried out according to the proportion of available area for whole piece of leather and shall meet the requirements specified in Table 3.
Table 3 Grading
Item Grade
Grade I Grade II Grade III Grade IV
Available area/% ≥ 90 80 70 60
Major positions of whole piece of leather (leather center, hip and back) Free of defect influencing the use function -
Minor defect/% ≤ 5
Note: minor defect: defect that have no influence on the inherent quality and use of the product, but may slightly influence the appearance such as slight dyeing defect, roughness on the leather surface and non-uniform color.
5 Test Methods
5.1 Tear load
Inspect according to QB/T 4198.
5.2 Elongation under the specified load
Inspect according to QB/T 2710.
5.3 Folding fastness of coating
Inspect according to QB/T 2714.
5.4 Odor
Inspect according to QB/T 2725.
5.5 pH value and diluted difference
Inspect according to QB/T 2724.
5.6 Decomposable harmful aromatic amine dyes
Inspect according to GB/T 19942.
5.7 Carcinogenic dyes
Inspect according to GB/T 30399.
5.8 Allergenous disperse dyes
Inspect according to GB/T 30398.
5.9 Free formaldehyde
Inspect according to GB/T 19941. In case dispute occurs and arbitration inspection is carried out, the chromatography shall prevail.
Foreword i 1 Scope 2 Normative References 3 Requirements 4 Grading 5 Test Methods 6 Inspection Rules 7 Acceptance, Marking, Packaging, Transportation and Storage
ICS 59.140.30 分类号:Y 46 备案号:57120—2017 中华人民共和国轻工行业标准 QB/T 5087—2017 箱包用皮革 Case and bag leather 2017—01—09发布 2017—07—01实施 中华人民共和国工业和信息化部 发布 前言 本标准按照GB/T 1.1—2009给出的规则起草。 本标准由中国轻工业联合会提出。 本标准由全国皮革工业标准化技术委员会(SAC/TC 252)归口。 本标准起草单位:泉州锦兴皮业有限公司、兴业皮革科技股份有限公司、峰安皮业股份有限公司、江源泰皮革有限公司、福建冠兴皮革有限公司、晋江市安海恒泰制革有限公司、中国皮革和制鞋工业研究院。 本标准主要起草人:许连来、蔡建设、陈荣辉、陈志明、曾江勇、许永乐、钱振中。 本标准为首次发布。 箱包用皮革 1 范围 本标准规定了箱包用皮革的要求、分级、试验方法、检验规则、验收、包装、标志、运输和贮存。 本标准适用于各种箱包用皮革(不包括移膜皮革)。 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,仅所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。 GB/T 19941 Leather and Fur-Chemical tests-Determination of formaldehyde content GB/T 19942 Leather and Fur-Chemical tests-Determination of banned azo colourants GB/T 22886 Leather - Tests for colour fastne - Colour fastne to water otting GB/T 22889 Leather - Physical and mechanical tests - Determination of surface coating thickness GB/T 30398 Leather and fur—Chemical tests—Determination of allergenic disperse dyestuffs GB/T 30399 Leather and fur―Chemical tests―Determination of carcinogenic dyestuffs QB/T 2537 Leather—Tests for colour fastness—Colour fastness to cycles of to-and-fro rubbing QB/T 2710 Leather - Physical and mechanical tests - Determination of tensile strength and percentage extension QB/T 2714 Leather -- Physical and mechanical tests -- Determination of flex resistance QB/T 2724 Leather -- chemical test -- Determination of ph QB/T 2725 Leather - Determination of Odour QB/T 2727-2017 Leather-- Tests for color fastness. Color fastness to artificial light: xenon art fading lamp test QB/T 2801 Leather-The rules of examination for acceptance packing marking transportation and conservation QB/T 4198 Leather—Physical and mechanical tests—Determination of tear load:Single edge tear 3要求 3.1 理化性能 应符合表1的规定。 表1理化性能 项 目 指 标 撕裂力/N ≥ 15 规定负荷伸长率/%(规定负荷10 N/mm2) ≤ 60 涂层耐折牢度 10 000次无裂纹 气味/级 ≤ 3 pH 3.5~6.0 pH稀释差(当pH<4.0时,检验稀释差) ≤ 0.7 可分解有害芳香胺染料/(mg/kg) ≤ 30 致癌染料/(mg/kg) ≤ 30 致敏性分散染料/(mg/kg) ≤ 30 游离甲醛/(mg/kg) ≤ 150