This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces QB/T 2934-2008 Grass-plaited products.
In addition to editorial changes, the following technical changes have been made with respect to QB/T 2934-2008:
——the clause - “Scope” is modified (see Clause 1; Clause 1 of 2008 Edition);
——the clause - “Normative references” is modified (see Clause 2; Clause 2 of 2008 Edition).
——the clause - “Terms and definitions” is added (see Clause 3).
——the requirements for materials, edges, embroidery and printing in the appearance are modified (see Sublclauses 5.1.1, 5.1.3, 5.1.4; Subclauses 4.1.1, 4.1.3, 4.1.4 of 2008 Edition);
——the requirements for specification and dimension are modified (see Subclause 5.2; Subclause 4.2 of 2008 Edition);
——the requirements for filler are modified (see Subclause 5.3; Subclause 4.3 of 2008 Edition);
——the requirements and test methods of moisture content are modified (see Subclauses 5.4 and 6.4; Subclauses 4.5 and 5.4 of 2008 Edition);
——the requirements and test methods of formaldehyde content are modified (see Table 1 of Subclause 5.5, and Subclause 6.5.1; Subclauses 4.4.1 and 5.4.1 of 2008 Edition);
——the requirements and test methods of pH are added (see Table 1 of Subclause 5.5; Subclause 6.5.2);
——the requirements and test methods of color fastness are modified (see Table 1 of Subclause 5.5, and Subclause 6.5.3; Subclauses 4.4.3 and 5.4.3 of 2008 Edition);
——the requirements and test methods of decomposable carcinogenic aromatic amine dyes are modified (see Table 1 of Subclause 5.5, and Subclause 6.5.4; Subclauses 4.4.2 and 5.4.2 of Edition 2008);
——the type inspection rules are modified (see Subclause 7.3; Subclause 6.2 of 2008 Edition);
——the requirements for mark are modified (see Subclause 8.1; Subclause 7.1 of 2008 Edition);
——Annex A and Bibliography are added.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Center for Standardization of Sundry Articles.
The previous edition of this standard is as follows:
——QB/T 2934-2008.
Grass-plaited product
1 Scope
This standard specifies the terms and definitions, classification, requirements, test methods and inspection rules, marking, packaging, transportation and storage of grass-plaited products.
This standard is applicable to grass-plaited products made of natural grass and imitation grass alone or mainly made of natural grass and imitation grass, and woven with fabric material.
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 reference, the latest edition (including all the amendments) applies.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes--Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process
GB/T 2912.1 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 3922 Textiles--Testing method for colour fastness to perspiration
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 17592 Textiles - Determination of the banned azo colourants
GB/T 18886 Textiles - Tests for fastness - Colour fastness to saliva
GB/T 23344 Textiles - Determination of 4-aminoazobenzene
GB 31701-2015 Safety technical code for infants and children textile products
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
grass-plaited product
this standard is applicable to grass-plaited products made of natural grass, imitation grass alone or mainly made of natural grass and imitation grass and woven with fabric material
3.2
natural grass-plaited product
grass-plaited product made of artificially or natural plant (grass)
3.3
imitation of the grass-plaited product
grass-plaited product made of or containing cellulosic material
3.4
grass-plaited product for infant
grass-plaited product for infants of 36 months or below
4 Product classification
Grass-plaited product can be classified into natural grass-plaited product and imitation of the grass-plaited product.
5 Requirements
5.1 Appearance
5.1.1 Materials
5.1.1.1 The textile materials of natural grass-plaited product shall be uniform in color, and free from disease grass and weed.
5.1.1.2 The materials of imitation of the grass-plaited product shall be uniform in color, and basically consistent in thickness, and free from obvious broken skin.
5.1.2 Surface
5.1.2.1 The product surface shall be smooth and even, basically consistent in color and luster, and free from mold, damage by worms and other stains.
5.1.2.2 The surface shall be woven tightly and uniformly without any obvious defect.
5.1.2.3 The product surface pattern design shall be clear in layer, correct in process plate, and free from color trace and overlap.
5.1.3 Edge
5.1.3.1 The turned edge shall be tidy, flat, smooth and free from serration.
5.1.3.2 The covered edge shall be flat, smooth and free from wrinkle or roughness. The wrapped angle shall be firm and the rounded angle shall be round and smooth.
5.1.3.3 Except the decorative sewing stitches, the stitches shall be uniform and free from skipped stitch, and the number of stitches shall not be less than 6 per 30 mm.
5.1.4 Embroidery and printing
5.1.4.1 The stitches shall be even, and free from thread end; the pattern shall have natural change and appropriate density; the embroidered surface shall clean and smooth. It shall be free from stain. The flat embroidery shall be even without obvious missing embroidery.
5.1.4.2 The printing shall be clear, and free from stain and missing printing.
5.2 Specification and dimension
5.2.1 The product shall be indicated with length, width and dimension (except special shaped products).
5.2.2 The allowable deviation of length, width and dimension of natural grass-plaited product is about ±20 mm.
5.2.3 The allowable deviation of specification and dimension of imitation of the grass-plaited product is ±3.5%.
5.3 Filler
The filler shall be clean, tidy, and not leaking and shall not contain other impurities other than raw materials and filler materials.
5.4 Moisture content
The moisture content shall not be greater than 12%.
5.5 Hygiene safety
Hygiene safety of the products is specified in Table 1
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Table 1
Item Unit Grass-plaited product for
infants Bed-mat, pillow cover, pillowcase,
pillow Cushion, back cushion, and other grass-plaited products without direct contact with the skin
Formaldehyde content mg/kg ≤20 ≤75 ≤300
pH / 4.0~7.5 4.0~8.5 4.0~9.0
Color fastness a Fastness to alkali perspiration Discoloration, staining Grade ≥3-4 ≥3 ≥3
Fastness to alkali perspiration Discoloration, staining ≥3-4 ≥3 ≥3
Fastness to rubbing Dry rubbing ≥4 ≥3 ≥3
Wet rubbing ≥3-4 ≥3 ≥3
Fastness to saliva b Discoloration, staining ≥4 / /
Decomposable carcinogenic aromatic amine dye c mg/kg ≤20
Needle and metal foreign body / None
a Color fastness is not assessed on undyed mat surface of natural grass-plaited product.
b Color fastness to saliva is assessed on grass-plaited product for infant.
c Decomposable carcinogenic aromatic amine dye is not assessed on undyed natural grass-plaited product.
6 Test method
6.1 Appearance
Spread in horizontal direction under natural light or under daylight lamp of 40W for visual inspection.
6.2 Specification and dimension
Carry out visual inspection and measure with a steel tape with a graduation of 1 mm.
6.3 Filler
Carry out visual inspection after the product is taken apart.
6.4 Moisture content
Test with the method specified in Annex A.
6.5 Hygiene safety
6.5.1 Formaldehyde content
Test with the method specified in GB/T 2912.1.
6.5.2 pH
Test with the method specified in GB/T 7573.
6.5.3 Color fastness
6.5.3.1 Color fastness to acid and alkali perspiration is tested with the method specified in GB/T 3922.
6.5.3.2 Color fastness to rubbing is tested with the method specified in GB/T 3920. When the sample size is insufficient, rub the product hard back and forth 10 times within 100 mm of the colored portion with an absorbent gauze (dry rubbing) and a sufficiently permeated with pure water (wet rubbing).
6.5.3.3 The color fastness to saliva shall be tested with the method specified in GB/T 18886.
6.5.4 Decomposable carcinogenic aromatic amine dye
Test with the method specified in GB/T 17592. When aniline and/or 1,4-phenylenediamine are detected, test according to GB/T 23344.
6.5.5 Needle and metal foreign body
Test with a needle detector.
7 Inspection rules
7.1 Inspection classification
It's classified into end-of-manufacturing inspection and type inspection.
7.2 End-of-manufacturing inspection
7.2.1 The products to be delivered must be subjected to end-of-manufacturing inspection; only after passing the inspection by the product quality inspection department, can they be delivered. Meanwhile, they shall be accompanied with quality qualification certificate.
7.2.2 The end-of-manufacturing inspection must be as specified in GB/T 2828.1-2012. Single sampling plan for normal inspection with the inspection level I for general use is adopted, with the inspection items, requirements terms, test method terms and acceptance quality limit (AQL) shown in Table 2.
Table 2
S.N. Inspection item Requirement Test method AQL
1 Appearance 5.1 6.1 6.5
2 Specification and dimension 5.2 6.2
3 Needle and metal foreign body 5.5 6.5.5
7.2.3 With an unqualified item, the piece of product is judged as unqualified in the end-of-manufacturing inspection.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Requirements
6 Test method
7 Inspection rules
8 Marking, packaging, transportation and storage
Annex A (Normative) Test method for moisture content
Bibliography
