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.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Leather Industry of Standardization Administration of China (SAC/TC 252).
This standard is issued as first edition.
Laptop Bag
1 Scope
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of laptop bag.
This standard is applicable to bags, pockets and sleeves mainly used for storing laptops, tablet PCs and fittings.
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.
GB/T 1740 Determination of Resistance to Heat and Humidity of Paint Films
GB/T 1771 Paints and Varnishes - Determination of Resistance to Neutral Salt Spray (Fog)
GB/T 2912.1-1998 Textiles - Determination of Formaldehyde - Part 1: Free and Hydrolyzed Formaldehyde (Water Extraction Method)
GB/T 3920 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing
GB/T 4744-1997 Textile Fabrics - Determination of Resistance to Water Penetration - Hydrostatic Pressure Test
GB/T 17592-2006 Textiles - Determination of the Banned Azo Colourants
GB 19340-2003 Adhesives for Footwear and Case and Bag
GB 20400-2006 Leather and Fur - Limit of Harmful Matter
GB 21550-2008 The Restriction of Hazardous Materials in Polyvinyl Chloride Artificial Leather
GB/T 22889 Leather - Physical and Mechanical Tests - Determination of Surface Coating Thickness
QB/T 1586.1 Hardware Fitting of Case and Bag-case-lock
QB/T 2002.1 Technical Specification for Electroplated Layer on Leather Hardware Accessory
QB/T 2002.2 Technical Specification for Spray Paint Layer on the Surface of Leather Hardware Accessory
QB/T 2537 Leather - Tests for Colour Fastness - Colour Fastness to Cycles of To-and-fro Rubbing
QB/T 2922 Case and Bag - Test Method for Shaking Impact
QB/T 3826 Corrosion-resistant Testing Method of the Metal Deposits and Conversion Coatings for the Light Industrial Products - Neutral Salt Spraying Test (NSS)
QB/T 5083-2017 Case and Bag - Determination of Capacity Rate
3 Product Classification
3.1 Classified according to surface material:
a) Leather laptop bag (sleeve);
b) Artificial leather/synthetic leather laptop bag (sleeve);
c) Reclaimed leather laptop bag (sleeve);
d) Textile fabric laptop bag (sleeve);
e) Laptop bags (sleeves) of various fabrics;
f) Laptop bags (sleeves) of other materials.
3.2 Classified according to product structure:
a) Laptop bags (sleeves) with various shoulder straps;
b) Laptop bags (sleeves) with various handles;
c) Laptop bags (sleeves) with various shoulder straps and handles;
d) Bags, sleeves and pockets of other structures.
4 Requirements
4.1 Materials and fittings
Selected according to relevant product standards.
4.1.1 Limit of harmful substance
Limit of harmful substance in leather, reclaimed leather and textile materials shall meet the requirements of Table 1, GB 20400-2006; the limit of harmful substance in polyvinyl chloride artificial leather shall meet the requirements of GB 21550-2008; the limit of harmful substances in adhesive used for cases and bags shall meet the requirements of Table 2.
Table 1 Limit of Harmful Substances in Leather, Reclaimed Leather and Textile Materials
mg/kg
Item Limit
Laptop bag and pocket Laptop sleeve
Free formaldehyde ≤ 300 75
Decomposable carcinogenic aromatic amine dyes ≤ 30
Note: see Annex A, GB 20400-2006 for the banned aromatic amines. If the content of 4-aminobiphenyl and (or) 2-naphthylamnine exceeds 30mg/kg, it cannot be judged that the banned azo colorants are used based on existing scientific knowledge without other evidences.
Table 2 Limit of Harmful Substances in Adhesives for Cases and Bags
Item Limit
Benzene/(g/kg) ≤ 5.0
Methyl benzene + dimethylbenzene/(g/kg) ≤ 200
Free toluene diisocyanate a/(g/kg) ≤ 10.0
N-hexane/(g/kg) ≤ 150
Dichloromethane Halohydrocarbon/(g/kg) ≤ 50.0
1, 2-dichloroethane
1, 1, 2-trichloroethane
Trichloroethylene
Total volatile organic compound/(g/L) ≤ 750
a The item is tested for polyurethane adhesive.
4.1.2 Locks
Locks shall meet the requirements of QB/T 1586.1 or relevant product standards.
4.1.3 Hardware fittings
Hardware fittings shall meet the requirements of QB/T 2002.1 and QB/T 2002.2.
4.2 Specification
Product specification shall meet the design requirements; the permissible deviation of bag products is ±10mm while that of tablet PC sleeve products is ±5mm.
Note: the longest distance of the contour length of the main product structure is the product specification.
4.3 Appearance quality
Appearance quality shall meet the requirements of Table 3.
Table 3 Appearance Quality Requirements
S.N. Item Requirements
High-grade product Acceptable product
1 Overall appearance Provided with plump form, natural arc, flat and smooth sticking, symmetrical angle; upright, tidy and clean Provided with plump form, natural arc, flat and smooth sticking, symmetrical angle; upright, tidy and clean
2 Fabric Leather, reclaimed leather and artificial leather/synthetic leather Uniform in thickness; free of broken surface, crazing and decoloration. The surface is flat and smooth; the front and rear large faces are free of damage, obvious mark and scratch; free of mark, unevenness and blotch Uniform in thickness; free of broken surface, crazing and decoloration. The surface is flat and smooth; the front and rear large faces are free of damage; the rear large face and bottom may allow for two mat patches with area not greater than 9mm2. Two invisible mark and scratches are allowable; free of obvious mark, unevenness and blotch
Textile Free of broken warp, broken weft, skipped yarn, skipped thread, mark, stain and flaw Main parts are free of broken warp, broken weft, skipped yarn, skipped thread, mark, stain and flaw while secondary parts may allow for two minor defects
3 Lining Flat, smooth and upright; neat and clean; free of defects like broken face, broken thread, broken weft, skipped yarn, broken roll and puffed selvedge
4 Stitches The upper and lower threads fit and the stitches are straight and flat. The stitch length is consistent. The surface shall be free of empty, dropped or skipped stitches. Free of crooked stitch and the backstitching shall be smooth and uniform The upper and lower threads fit and the stitches are straight and flat. The stitch length is consistent. The surface shall be free of dropped or skipped stitches. Free of serious crooked stitch. For single product, at most one position is allowed to have empty stitch, drop stitch and skipping stitch, and each shall not exceed two stitches; the backstitching shall be smooth and uniform
5 Zippers Stitching shall be straight and flat with consistent edge distance; the pull-off shall be smooth and free from mismatch, teeth falling and decoloration.
6 Fittings Bright; free of residual rust, skipped coating, burr, pinhole, bubbling, peeling, shedding and obvious scratch Bright; free of residual rust, skipped coating, burr, pinhole, bubbling, peeling and shedding
7 Assembly of fittings Flat, smooth and firm
8 Standard sample a The standard sample attached to the product shall be made of the same material with the main material of laptop bag
a Standard sample refers to the sample attached to the product to indicate the main material; this item is not inspected for the product without standard sample.
4.4 Identification
——according to the classification requirements of 3.1, certain surface material of single product shall be indicated when its area exceeds 20% of the total area;
——"splitting" font style shall be indicated for split leather material;
——for composite material made of various components, where the substrate thickness of leather is not greater than 2/3 of the total thickness, "leather" shall not be indicated.
4.5 Physical and chemical performance
Physical and chemical performance shall meet the requirements of Table 4.
Foreword i
1 Scope
2 Normative References
3 Product Classification
4 Requirements
5 Test Methods
6 Inspection Rules
7 Marking, Packaging, Transportation and Storage
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.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Leather Industry of Standardization Administration of China (SAC/TC 252).
This standard is issued as first edition.
Laptop Bag
1 Scope
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of laptop bag.
This standard is applicable to bags, pockets and sleeves mainly used for storing laptops, tablet PCs and fittings.
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.
GB/T 1740 Determination of Resistance to Heat and Humidity of Paint Films
GB/T 1771 Paints and Varnishes - Determination of Resistance to Neutral Salt Spray (Fog)
GB/T 2912.1-1998 Textiles - Determination of Formaldehyde - Part 1: Free and Hydrolyzed Formaldehyde (Water Extraction Method)
GB/T 3920 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing
GB/T 4744-1997 Textile Fabrics - Determination of Resistance to Water Penetration - Hydrostatic Pressure Test
GB/T 17592-2006 Textiles - Determination of the Banned Azo Colourants
GB 19340-2003 Adhesives for Footwear and Case and Bag
GB 20400-2006 Leather and Fur - Limit of Harmful Matter
GB 21550-2008 The Restriction of Hazardous Materials in Polyvinyl Chloride Artificial Leather
GB/T 22889 Leather - Physical and Mechanical Tests - Determination of Surface Coating Thickness
QB/T 1586.1 Hardware Fitting of Case and Bag-case-lock
QB/T 2002.1 Technical Specification for Electroplated Layer on Leather Hardware Accessory
QB/T 2002.2 Technical Specification for Spray Paint Layer on the Surface of Leather Hardware Accessory
QB/T 2537 Leather - Tests for Colour Fastness - Colour Fastness to Cycles of To-and-fro Rubbing
QB/T 2922 Case and Bag - Test Method for Shaking Impact
QB/T 3826 Corrosion-resistant Testing Method of the Metal Deposits and Conversion Coatings for the Light Industrial Products - Neutral Salt Spraying Test (NSS)
QB/T 5083-2017 Case and Bag - Determination of Capacity Rate
3 Product Classification
3.1 Classified according to surface material:
a) Leather laptop bag (sleeve);
b) Artificial leather/synthetic leather laptop bag (sleeve);
c) Reclaimed leather laptop bag (sleeve);
d) Textile fabric laptop bag (sleeve);
e) Laptop bags (sleeves) of various fabrics;
f) Laptop bags (sleeves) of other materials.
3.2 Classified according to product structure:
a) Laptop bags (sleeves) with various shoulder straps;
b) Laptop bags (sleeves) with various handles;
c) Laptop bags (sleeves) with various shoulder straps and handles;
d) Bags, sleeves and pockets of other structures.
4 Requirements
4.1 Materials and fittings
Selected according to relevant product standards.
4.1.1 Limit of harmful substance
Limit of harmful substance in leather, reclaimed leather and textile materials shall meet the requirements of Table 1, GB 20400-2006; the limit of harmful substance in polyvinyl chloride artificial leather shall meet the requirements of GB 21550-2008; the limit of harmful substances in adhesive used for cases and bags shall meet the requirements of Table 2.
Table 1 Limit of Harmful Substances in Leather, Reclaimed Leather and Textile Materials
mg/kg
Item Limit
Laptop bag and pocket Laptop sleeve
Free formaldehyde ≤ 300 75
Decomposable carcinogenic aromatic amine dyes ≤ 30
Note: see Annex A, GB 20400-2006 for the banned aromatic amines. If the content of 4-aminobiphenyl and (or) 2-naphthylamnine exceeds 30mg/kg, it cannot be judged that the banned azo colorants are used based on existing scientific knowledge without other evidences.
Table 2 Limit of Harmful Substances in Adhesives for Cases and Bags
Item Limit
Benzene/(g/kg) ≤ 5.0
Methyl benzene + dimethylbenzene/(g/kg) ≤ 200
Free toluene diisocyanate a/(g/kg) ≤ 10.0
N-hexane/(g/kg) ≤ 150
Dichloromethane Halohydrocarbon/(g/kg) ≤ 50.0
1, 2-dichloroethane
1, 1, 2-trichloroethane
Trichloroethylene
Total volatile organic compound/(g/L) ≤ 750
a The item is tested for polyurethane adhesive.
4.1.2 Locks
Locks shall meet the requirements of QB/T 1586.1 or relevant product standards.
4.1.3 Hardware fittings
Hardware fittings shall meet the requirements of QB/T 2002.1 and QB/T 2002.2.
4.2 Specification
Product specification shall meet the design requirements; the permissible deviation of bag products is ±10mm while that of tablet PC sleeve products is ±5mm.
Note: the longest distance of the contour length of the main product structure is the product specification.
4.3 Appearance quality
Appearance quality shall meet the requirements of Table 3.
Table 3 Appearance Quality Requirements
S.N. Item Requirements
High-grade product Acceptable product
1 Overall appearance Provided with plump form, natural arc, flat and smooth sticking, symmetrical angle; upright, tidy and clean Provided with plump form, natural arc, flat and smooth sticking, symmetrical angle; upright, tidy and clean
2 Fabric Leather, reclaimed leather and artificial leather/synthetic leather Uniform in thickness; free of broken surface, crazing and decoloration. The surface is flat and smooth; the front and rear large faces are free of damage, obvious mark and scratch; free of mark, unevenness and blotch Uniform in thickness; free of broken surface, crazing and decoloration. The surface is flat and smooth; the front and rear large faces are free of damage; the rear large face and bottom may allow for two mat patches with area not greater than 9mm2. Two invisible mark and scratches are allowable; free of obvious mark, unevenness and blotch
Textile Free of broken warp, broken weft, skipped yarn, skipped thread, mark, stain and flaw Main parts are free of broken warp, broken weft, skipped yarn, skipped thread, mark, stain and flaw while secondary parts may allow for two minor defects
3 Lining Flat, smooth and upright; neat and clean; free of defects like broken face, broken thread, broken weft, skipped yarn, broken roll and puffed selvedge
4 Stitches The upper and lower threads fit and the stitches are straight and flat. The stitch length is consistent. The surface shall be free of empty, dropped or skipped stitches. Free of crooked stitch and the backstitching shall be smooth and uniform The upper and lower threads fit and the stitches are straight and flat. The stitch length is consistent. The surface shall be free of dropped or skipped stitches. Free of serious crooked stitch. For single product, at most one position is allowed to have empty stitch, drop stitch and skipping stitch, and each shall not exceed two stitches; the backstitching shall be smooth and uniform
5 Zippers Stitching shall be straight and flat with consistent edge distance; the pull-off shall be smooth and free from mismatch, teeth falling and decoloration.
6 Fittings Bright; free of residual rust, skipped coating, burr, pinhole, bubbling, peeling, shedding and obvious scratch Bright; free of residual rust, skipped coating, burr, pinhole, bubbling, peeling and shedding
7 Assembly of fittings Flat, smooth and firm
8 Standard sample a The standard sample attached to the product shall be made of the same material with the main material of laptop bag
a Standard sample refers to the sample attached to the product to indicate the main material; this item is not inspected for the product without standard sample.
4.4 Identification
——according to the classification requirements of 3.1, certain surface material of single product shall be indicated when its area exceeds 20% of the total area;
——"splitting" font style shall be indicated for split leather material;
——for composite material made of various components, where the substrate thickness of leather is not greater than 2/3 of the total thickness, "leather" shall not be indicated.
4.5 Physical and chemical performance
Physical and chemical performance shall meet the requirements of Table 4.
Contents of QB/T 5082-2017
Foreword i
1 Scope
2 Normative References
3 Product Classification
4 Requirements
5 Test Methods
6 Inspection Rules
7 Marking, Packaging, Transportation and Storage
