Some standard content:
Light Industry Standard of the People's Republic of China
Leather belt
Subject content and scope of application
QB/T1618—1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of leather belts. This standard applies to leather belts made of natural leather such as cow and pig harness leather. 2 Terminology
2.1 Belt head: the part where the buckle is installed.
2.2 Belt tail: the part close to the belt hole.
2.3 Shake head: the folded part of the belt head leather.
2.4 Riveted parts: four-button, rivet, etc.
2.5 Leather ring; small circle made of leather.
3 Product classification
3.1 According to the raw materials, it can be divided into yellow cow leather, buffalo leather, pig leather belt, etc. 3.2 According to the leather surface, it can be divided into smooth belt, embossed belt, etc. 3.3 According to the structure, it can be divided into single-layer belt, multi-layer belt, etc. 3.4
Leather belt schematic diagram is as follows:
西由由由
Leather belt schematic diagram
1-Belt head; 2-Belt tail; 3-Ghost head; 4-Parts, 5-Leather circle; 6-Belt length, 7-Belt width; 8-Belt hole 4 Technical requirements
4.1 Width, thickness and length should comply with the requirements of Table 1. Approved by the Ministry of Light Industry of the People's Republic of China on November 10, 1992, 366
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Width allowable error
QB/T1618-—1992
2Leather rings, belt holes, and the number of belt holes shall comply with the provisions of Table 2. 4.2
Rings, mm
Appearance quality shall comply with the provisions of Table 3.
Riveted parts
Solid, plump, without loose shells or cracks, uniform thickness, no obvious spots or knife wounds on the leather surface, obvious patterns, and uniform concave and convex. For the series with width less than or equal to 20mm, the thickness shall not be less than 2mm; for the series with width greater than 20mm, the thickness shall not be less than 2.5mm. Length
7001050
900～1300
Hole, mm
Distance from tail end
75~105
Qualified products
Allowable length error
Number of holes, only
Firm and plump, without loose shell or cracked surface, uniform thickness, no serious knife wounds, 4 scattered broken piths are allowed, and the rough area of each broken part shall not exceed 3mm.
For widths less than or equal to 20mm, the thickness shall not be less than 1.8mm; for widths greater than 20mm, the thickness shall not be less than 2mm. Smooth, bright, and non-fading.
Thickness is uniform and shall not be less than 1.5mm, and the leather shall not crack at the buttoning.
Thickness is uniform and shall not be less than 1.5mm, and slight cracks are allowed at the buttoning.
The leather is firm and round.
Vertically centered, the hole spacing is equal, and the error shall not be greater than 1.5mm. The distance is equal. , firmly installed, no knocking cancer, no paint peeling, the error from the belt edge shall not be greater than 1.5mm
Vertically centered, equal hole distance, the error shall not be greater than 2mmEqual distance, firmly installed, no serious knocking cancer, paint peeling, the error from the belt edge shall not be greater than 2mm
Basically flat and uniform
The color is basically the same as the leather belt, and the size of the belt is consistent. Neat and clean, the accessories are smooth, and there are no burrsSewing requirements
Needle length: 6~10 needles/25mm.
Seam margin: 1.5~3.0mm,
The stitches are clear, straight, consistent in tightness, evenly sparse and dense, and shall not be seriously skewed. There are no missing stitches, floating threads, or double needle eyes on the exposed parts, and the skipped stitches shall not exceed 4.4.3
More than 1 stitch.
5 Inspection method
5.1 Based on the visual perception, combined with measuring tools. 5.2 Thickness: Measure with a leather thickness gauge with a graduation value of 0.1mm. 5.3 Width: Measure with a steel ruler with a graduation value of 0.5mm. 5.4 Length: Measure with a tape measure with a graduation value of 1mm. 367
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5.5 Crack surface test: When the leather surface is bent 180° outward around a cylinder with a diameter of 30mm, check whether cracks appear on the leather surface. 5.6 Discoloration test: Rub any part of the leather surface in the same direction five times with a dry fine white cloth to see whether it discolors. 6 Inspection rules
6.1 Factory inspection
6.1.1 Randomly sample 5% of the leather belts produced in batches and inspect 4.1, 4.2, 4.4.1, and 4.4.2. Articles 4.3 and 4.4.3 are inspected piece by piece and the grades are determined.
6.2 Type inspection
6.2.1 Type inspection is carried out on qualified batches of factory inspection, and all technical requirements are inspected. 6.2.2 Type inspection shall be carried out in any of the following situations. a.
Main process parameters change;
The purchaser proposes type inspection requirements;
The national quality supervision agency proposes type inspection requirements. c
6.2.3 Random sampling is adopted, and the sampling quantity is: 20 pieces for every 1,000 pieces, 10 pieces are added for more than 1,000 pieces, and less than 1,000 pieces are counted as 1,000 pieces. 6.3 Determination rules
6.3.1 Determination of single product
Determination of single product shall be in accordance with 4.3 and 4.4.3. If there are more than 3 defects or two of the other technical requirements are unqualified, the product shall be judged as unqualified.
6.3.2 Batch evaluation
If the qualified rate of the sampling volume is above 90%, the batch is judged to be qualified. If the qualified rate does not reach 90%, double sampling and re-inspection shall be carried out. If the qualified rate still does not reach 90%, the batch is judged to be unqualified.
7 Marking, packaging, transportation and storagebzxZ.net
7.1 Marking
7.1.1 The length of the product shall be indicated and a certificate of conformity shall be attached. 7.1.2 The outer packaging shall indicate the factory name, address, trademark, product name, product number, quantity and date of manufacture. 7.2 Packaging
7.2.1 The inner packaging shall be a paper box.
7.2.2 Use corrugated cartons for outer packaging.
7.3 Transportation
It is strictly forbidden to expose to the sun and rain, and it must not be shipped in the same vehicle with chemicals such as acids and alkalis. 7.4 Storage
7.4.1 The warehouse should be ventilated and dry, and the products should be stacked on shelves that are more than 200mm above the ground and walls. 7.4.2 During the storage period, regular unpacking inspections should be carried out, and the products should be rearranged if moisture or mold is found. Additional instructions:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Fur Leather Standardization Center. This standard was drafted by Shanghai Yadong Leather Factory. The main drafters of this standard are Cui Ruogui and Li Hengde. 368
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