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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard is a revision of QB/T 1618-2006 Leather Belt.
In addition to a number of editorial changes, the following technical changes have been made with respect to QB/T 1618-2006:
——The name of the standard is changed to "Belt";
——The “Scope” is adjusted, with the application scope of this standard extended;
——The non-dedicated items in the original "Terms and Definitions" are deleted and the entry "decorative belt" is added;
——The “Product Classification” is adjusted and the “Classification by Use Function” is added;
——Requirements for “specifications” and “superior product” are deleted;
——“Raw material and fittings” and “belt key” are added;
——“Appearance quality” and "sewing requirements” are merged;
——“Physical and mechanical properties” is adjusted and detailed;
——“Fracture properties” is changed to “rubbing resistance of belt";
——The requirements for “Marking” are adjusted.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of National Technical Committee on Leather of Standardization Administration of China (SAC/TC 252).
This standard replaces the former light industry standard QB/T 1618-2006 Leather Belt, which is abolished from the implementation date of this standard.
The previous editions of this standard are as follows:
——QB/T 1618-2006;
——QB/T 1618-1992.
Belt
1 Scope
This standard specifies the terms and definitions, product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of belt.
This standard is applicable to belts of everyday use made of materials such as leather, fur, artificial leather/synthetic leather, reclaimed leather and textiles.
This standard is not applicable to belts for special purposes.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 2912.1 Textiles - Determination of Formaldehyde - Part 1: Free and Hydrolized Formaldehyde (Water Extraction Method);
GB/T 3920 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing
GB/T 17592 Textiles - Determination of Banned Azo Colourants
GB 20400 Leather and Fur - Limit of Harmful Matter
GB 21550 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 2002.1 Leather Hardware Fittings - Technical Specifications for Galvanized Coating
QB/T 2002.2 Leather Hardware Fittings - Technical Conditions of Surface Spray Painting
QB/T 2537 Leather - Colour Fastness Test - Colour Fastness to Reciprocating Rubbing
QB/T 2790 Dyeing Fur - Testing Method for Colour Fastness to Rubbing
QB/T 4117 Belt Key
QB/T 5246 Leather Goods - Leather Goods - Dynamic Folding Test Method for Belt Products
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
belt head
the end of belt fitted with belt key
3.2
belt bottom
the end of belt opposite to belt head
3.3
swing head
folded position of material at belt head
3.4
belt body
the loop that guides and restrains the belt
3.5
decorative belt
belt used as a decoration, such as super-slender belt and decorative belt used for performance
4 Product Classification
4.1 Classification by materials used:
——belts made of leather and fur;
——belts made of artificial/synthetic leather;
——belts made of reclaimed leather;
——fabric belts;
——plastic belts;
——belts made of other materials.
4.2 Classification by belt structure:
——single-layer belts;
——multi-layer belts;
——woven abdominal belts.
4.3 Classification by use functions:
——conventional belts (see Figure 1 for the schematic diagram for positions of common designs);
——decorative belts.
1—belt key; 2—belt bottom; 3—swing head; 4—fixed parts; 5—belt body; 6—belt hole; 7—belt teeth
Figure 1 Schematic Diagram for Positions of Belt
5 Requirements
5.1 Raw material and fittings
They shall be selected in accordance with relevant product standard.
5.1.1 Limit of harmful matters
The limit of harmful matters in leather, fur, reclaimed leather and textile materials shall meet the requirements of Table 1; that in polyvinyl chloride artificial leather shall meet the requirements of GB 21550.
Table 1 Limit of Harmful Matters in Leather, Fur, Reclaimed Leather and Textile Materials
In: mg/kg
Item Limit
Free formaldehyde ≤ 300
Dissoluble harmful aromatic amine dyes ≤ 30
Note: see Annex A of GB 20400 for the names of banned aromatic amines. If the content of 4-aminobiphenyl and (or) 2-naphthylamine exceeds 30mg/kg, and there is no other evidence, it cannot be judged that the banned azo colourants are used based on existing scientific knowledge.
5.1.2 Metal fittings
They shall meet the requirements of QB/T 2002.1 and QB/T 2002.2.
5.2 Appearance quality and sewing (adhesion) requirements
Requirements of Table 2 shall be met.
Table 2 Appearance Quality and Sewing (Adhesion) Requirements
No. Item Requirement
1 Surface and inner material Leather and reclaimed leather The leather surface is flat, uniform in thickness, and is free from peeling, fracture or cracking. No serious creases or cuts in leather surface which allows three spots of unobvious minor disfigurements or mat patches to exist, no larger than 9mm2 for each spot.
Fur basically smooth, glossy, loose and clean fur; no crochet; no obvious hair loss, oily hair or knot hair; strong dyeing with no floating color
Artificial/synthetic leather Without obvious mark, unevenness and lump
Textile No obvious defects such as broken warp, broken weft, skipped yarn, skipped thread, visible mark, stain or spot; three minor defects may exist in secondary positions
Other materials No defect affecting normal use and no defects that seriously affect the appearance
2 Belt hole and belt teeth Consistent with belt key, and no burr; firmly fixed with uniform spacing between teeth
3 Belt edge Smooth, no decoloration and no defects such as bubbles and cracks on surface.
4 Belt bottom Strong and rounded off
5 Belt bottom Basically flat
6 Belt body Neat, with smooth fittings and no burrs
7 Swing head With uniform thickness no less than 1.5mm
8 Metal pieces Rustless, burr-free and uniformly-coated; shadow scratch is allowable on the rear surface; firmly and regularly fixed
9 Belt loop Sleeved on the belt body with matchable size and suitable connecting piece.
10 Sewing and adhesion requirements Stitch length 6~12 stitches/30mm (except ornamental thread)
Stitch margin 1.5mm~3.0mm (except ornamental thread)
Stitches Straight, uniform, consistent-in-elasticity and free of visible skewness; free of dropped stitches, missing stitches, skipped stitches, floating thread and double needle holes
Adhesion Firmly adhered without degumming
5.3 Physical and mechanical properties
They shall meet the requirements of Table 3 and in case of woven belt, only bonding force between belt key and belt body is subject to inspection.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Product Classification
5 Requirements
6 Test Methods
7 Inspection Rules
8 Marking, Packaging, Transportation and Storage
