Some standard content:
National Standard of the People's Republic of China
Hand-knotted woollen carpet
Subject content and scope of application
GB/T 15050—94
This standard specifies the product classification, technical requirements, inspection methods, inspection rules and marking, packaging, transportation and storage requirements of hand-knotted woollen carpets.
This standard is applicable to hand-knotted carpets with wool yarn as tufts, and hand-knotted carpets with other fiber materials as tufts can also be used as a reference.
Reference standards
GB2910 Quantitative chemical analysis method for two-component fiber blended productsGB3920 Test method for color fastness to friction of textilesGB11049 Floor coverings Combustion performance Tablet test at room temperatureZBW55002 Inspection procedures for imported textiles
ZBW56008 Sampling inspection rules for hand-knotted carpets3 Product classification
Product variety
Hand-knotted wool carpets are divided into 8-shaped knots, horseshoe knots, and double knots according to the type of pile knots; they are divided into twisted carpets and drawn carpets according to the different carpet tissue structures.
3.2 Product specifications
Different specifications are distinguished by carpet shape, number of pile piles (number of piles/m), pile length (mm), width (m) × length (m). Note: Carpet shapes are divided into square (including rectangular), round (including oval and semicircular), and special shapes. 3.3 Product marking bzxZ.net
One standard number
Width (m) × length (m)
Pile length (mm)
Number of pile cutting paths (paths/m)
Variety and carpet shape
Marking example:
Hand-knotted wool (twisted) carpet, carpet shape Hand-knotted wool (twisted) carpet, carpet shape State Technical Supervision Bureau 1994-05-07 Approved 90
Reduced to Luo
1994-12-01 Implementation
GB/T 15050—94
Rectangular hand-knotted wool twisted carpet with 390 piles/m, pile length of 12.5mm and 1.83m×2.74m is marked as:
Hand-knotted wool (twisted) rectangular carpet 390-12.5-1.83×2.74GB/T150504 Technical requirements
4.1 Intrinsic quality technical indicators
shall comply with the requirements of Table 1.
Tolerance of number of pile passes
Tolerance of warp density
Tolerance of pile length
Tolerance of width and length of width 1.80m and below
Tolerance of width and length of width above 1.80m
Color fastness to light (xenon arc)
Color fastness to dry friction1)
Wool content of pile yarn
Flammability (horizontal method, tablets)
Note: 1) Only limited to chemically washed carpets, except for carpets dyed with plant dyes. 4.2 Appearance quality
4.2.1 The pattern should meet the design requirements, and the main edge and main ground color should basically meet the standard sample. The carpet surface should be basically smooth and clean, and the pattern should be clear and beautiful. 4.2.2
≥4 level
≥3-4 level
≥95%
Technical index
Damage length ≤75mm (at least seven out of eight pieces are qualified)
Square carpet edges are straight, and the width and length deviations of the carpet shape are not more than 1.5%. Round carpet roundness deviation is not more than 1.5%. The carpet back is basically flat.
The technical indexes of the base and the bottom fringe shall comply with the provisions of Table 2. 4.2.5
Width, m
1.80 and below
Above 1.80
Base height, cm
4.2.6Special technical requirements shall be agreed upon according to user needs. See Appendix A (Supplement) for details of appearance quality. 5 Inspection method
5.1Put the carpet on a plane with suitable light and inspect it under forward and reverse light. 5.2 Inspection of number of pile passes and warp density
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Bottom ear length, cm
GB/T 15050-94
Choose two places on the blanket back where the warp or weft direction is obviously uneven, measure the integer of pile knots close to 300mm along the warp and weft directions with a steel ruler, and then record the measured length corresponding to the number of knots, accurate to millimeters. The number of pile passes or warp density is calculated according to formula (1) (calculated separately for two places): S = 1 000 X
Where: S——number of pile passes, number of passes/m; or warp density, number of warps/m (accurate to one decimal place); N——integer of pile knots close to 300mm;
-N corresponding to the measured length, mm.
The number of pile paths or the percentage deviation of the warp density is calculated according to formula (2) (calculated separately at two locations): Ss.
2×100
Wherein: D—-the number of pile paths or the percentage deviation of the warp density, % (accurate to one decimal place); S. —the nominal number of pile paths, number of paths/m; or the nominal warp density, number of warps/m. The result is expressed as the maximum absolute value of the deviation percentage at two locations. 5.3 Pile length test
(2)
Insert a forked metal gauge marked with a known scale between two vertical pile paths, with the gauge in vertical contact with the carpet base, and measure the pile length to an accuracy of 0.5mm.
5.4 Dimension test
Use a steel tape measure or a measuring tape to measure the width and length dimensions at the center line of the carpet to an accuracy of 0.5cm. The width or length deviation percentage is calculated according to formula (3): x × 100
Wherein: X1—width or length deviation percentage, % (accurate to one decimal place); L1—measured value of width or length, m (accurate to three decimal places); L. —nominal value of width or length, m (accurate to two decimal places). 5.5 Carpet shape inspection
Square carpets are measured with a steel tape measure or a measuring tape at a distance of 10 cm from each edge of the carpet, accurate to 0.5 cm. The carpet width or length deviation percentage is calculated according to formula (4): Li- L×100
-carpet width or length deviation percentage, % (accurate to one decimal place); Wherein: X,
LL2—
measured values of width or length at two locations, m (accurate to three decimal places); L.一一Nominal value of width or length, m (accurate to two decimal places). (3)
Fold the circular blanket into a semicircle with the center line as the reference, measure the maximum difference in the outer edges of the two semicircles, and calculate the deviation percentage with reference to formula (4). 5.6 Inspection of base and base fringe
Measure with a steel ruler, accurate to millimeters.
5.7Inspect the pattern, color, blanket surface, blanket back and blanket edge by visual inspection and touch. The floating hair can also be inspected by instrument. 5.8 Color fastness inspection
5.8.1 Color fastness to light (xenon arc)
The test method shall be carried out in accordance with ZBW55002.
5.8.2 Color fastness to rubbing
The test method shall be in accordance with GB3920, where the diameter of the end face of the friction head of the carpet rubbing color fastness tester is 25mm, the downward pressure is 22N, and the size of the friction test cloth is 80mm×80mm. 5.9 Pile yarn wool content test
The test method shall be in accordance with GB2910.
5.10 Flammability resistance (horizontal method, tablet) test The test method shall be in accordance with GB11049.
6 Inspection rules
6.1 Factory inspection
GB/T15050—94
The factory inspection shall be fully inspected according to Items 1, 2, 3 and 4.2 in Table 1 of the technical requirements of this standard. 6.2 Type inspection
Type inspection shall be conducted by sampling in accordance with ZBW56008, and shall be inspected in accordance with Items 1, 2, 3 and 4.2 of Table 1 of the technical requirements of this standard. 6.3 New product quality appraisal (or certification) inspection shall be conducted by sampling in accordance with ZBW56008, and shall be inspected in accordance with Table 1 and 4.2 of the technical requirements of this standard. 6.4 Arbitration inspection
Inspect the items in dispute between the two parties in accordance with the technical requirements of this standard. 6.5 Judgment rules
6.5.1 Unit (piece) product judgment
If the inspection results meet the technical requirements, the piece of carpet shall be judged as a qualified product; if one or more items do not meet the technical requirements, the piece of carpet shall be judged as a non-conforming product.
6.5.2 Product batch judgment
If at least four of the five pieces of the sample are qualified, the batch of products shall be judged as qualified products; if two or more pieces are unqualified, the batch of products shall be judged as non-conforming products.
Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Product marking
Basic contents include manufacturer name, trademark, product mark, contract number, ground color number, pattern number, etc. 7.1.2 Packaging mark
Basic contents include manufacturer name, trademark, product mark, contract number, and reminders such as "no hooks allowed", "moisture-proof", "no heavy pressure", etc. 7.2 Packaging
Carpet packaging should ensure that the product is not damaged, can prevent dirt and moisture, and is easy to transport and store. 7.3 Transportation and storage
Carpets should not be heavily pressed during transportation and storage, and should be protected from sun and rain and moisture. Anti-moth agents should be added once a year during storage. 93
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GB/T15050—94
Appendix A
Appearance quality details
(supplement)
The color basically conforms to the standard sample: there is no obvious color cutting, wrong color, washing, printing, or color mixing. The color head is correct, and the color fading (color difference) after washing does not exceed half a color A1
level. The carpet surface is basically smooth and clean; the carpet surface is uniform, the pile is loose, plump and shiny. There is no obvious floating hair, fuzz 2), grooves, long hair, knife flowers, A2
obvious lines, half heads, stains.
Note: The pile length measurement card is supervised and provided by the National Carpet Quality Supervision and Inspection Center. 1) Floating hair (hair removal) refers to the appearance of short fibers that are not fixed in the carpet manufacturing process and float on the carpet surface in the early stage of use. It can be removed by brushing the carpet or vacuuming.
2) Fuzz is the fiber that exceeds the carpet surface and cannot be removed by brushing the carpet or vacuuming. The pattern is clear and beautiful: the pattern has no obvious shape, the cut is clear, the depth and width are consistent, and the slope of the piece is appropriate. A3
The carpet edge is straight: the cut edge is even, there is no slipping edge, and there is no lotus leaf edge. The edge is basically consistent in tightness and thickness, and the edge warp is not exposed and the edge is not adjacent. A4
A5 The back of the carpet is basically flat: no obvious twist, no convex warp, no skipped weft, no obvious grooves, convex bubbles and repair marks. No stains, no damage, additional notes:
This standard is proposed by the China Light Industry General Association.
This standard is under the jurisdiction of the National Carpet Standardization Technical Committee. This standard was drafted by Tianjin Carpet Research Institute, Tianjin Carpet Company, Shanghai Carpet General Factory, Qingdao Carpet Company, and Weihai Carpet Factory No. 1. The main drafters of this standard are Cheng Peijuan, Zhang, Meng Qiaogen, Wang Qingfeng, and Sun Xueming. 94
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