Detail of GB/T 39508-2020

Introduction of GB/T 39508-2020

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 Textile and Apparel Council. This standard is under the jurisdiction of National Technical Committee on Textiles of Standardization Administration of China (SAC/TC 209). Knitted garments for infants and children 1 Scope This standard specifies terms and definitions, sizing and specification, requirements, test methods, inspection rules, judgment rules, and instructions, packaging, transportation and storage of knitted garments for infants and children. This standard is applicable to knitted garments for infants and children made of knitted fabrics. 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 250 Textiles—Tests for color fastness—Grey scale for assessing change in color GB/T 1335.3 Standard sizing systems for garments—Children GB/T 2910 (All parts) Textiles—Quantitative chemical analysis GB/T 2912.1 Textiles—Determination of formaldehyde—Part 1: Free and hydrolyzed formaldehyde (water extraction method) GB/T 3920 Textiles—Tests for color fastness—Color fastness to rubbing GB/T 3921-2008 Textiles—Tests for color fastness—Color fastness to washing with soap or soap and soda GB/T 3922 Textiles—Tests for color fastness—Color fastness to perspiration GB/T 3923.1 Textiles—Tensile properties of fabrics—Part 1: Determination of maximum force and elongation at maximum force using the strip method GB/T 4802.1-2008 Textiles—Determination of fabric propensity to surface fuzzing and to pilling—Part 1: Circular locus method GB/T 4856 Package of cotton goods and knitwear GB/T 5296.4 Instructions for use of products of consumer interest—Part 4: Textiles and apparel GB/T 5711 Textiles—Tests for colour fastness—Colour fastness to dry cleaning using perchloroethylene solvent GB/T 5713 Textiles—Tests for color fastness - Color fastness to water GB/T 6411 A series of size of knitted underwear GB/T 7573 Textiles—Determination of pH of aqueous extract GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 8427-2008 Textiles—Tests for colour fastness—Colour fastness to artificial light: xenon arc fading lamp test GB/T 8629-2017 Textiles—Domestic washing and drying procedures for textile testing GB/T 12704.2-2009 Textiles—Test method for water-vapour transmission of fabrics —Part 2: Water method GB/T 14272 Down garments GB/T 14576 Textiles—Tests for color fastness—Color fastness to light of textiles wetted with artificial perspiration GB/T 14801 Test method for skewness and bow in woven and knitted fabrics GB/T 17592-2011 Textiles—Determination of the banned azo colourants GB/T 17593 (All parts) Textiles—Determination of heavy metals GB 18401 National general safety technical code for textile products GB/T 18886 Textiles—Tests for color fastness—Color fastness to saliva GB/T 19976-2005 Textiles—Determination of bursting strength—Steel ball method GB/T 23344-2009 Textiles—Determination of 4-aminoazobenzene GB/T 24121 Textile products—Determination of the remains of broken sewing needle GB/T 29862 Textiles—Identification of fiber content GB/T 31127-2014 Textiles—Tests for color fastness - Color fastness to transfer in joints GB 31701 Safety technical code for infants and children textile products FZ/T 01026 Textiles—Quantitative chemical analysis—Mulitinary fibre mixtures FZ/T 01057 (All parts) Test method for identification of textile fibers FZ/T 01095 Textile—Test method of elastane fibre content FZ/T 01101 Textile test method—Fiber content—Quantitative physical analysis FZ/T 73053-2015 Knitted down garments FZ/T 80007.3-2006 Dry wash resistance test method for garments used adhesive interlining GSB 16-1523 Knitted fabric fuzzing and pilling sample photograph 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 knitted garments for infants knitted garments for infants aged 36 months and below Note: The knitted garments suitable for infants with height of 100 cm or below can be used as knitted garments for infants. 3.2 knitted garments for children knitted garment for children aged 3 through 14 years old Note: The knitted garments for girls with height above 100 cm and below 155 cm or boys with height below 160 cm can be used as knitted garments for children. Among them, the knitted garments for children of 130 cm or lower can be used as knitted clothes for children under 7 years old. 4 Sizing and specification The size shall be marked in accordance with GB/T 6411 or GB/T 1335.3, and the sizing beyond the range may be increased or decreased in sequence according to the grading values and principles specified in the standard. 5 Requirements 5.1 Specific requirements The requirements involve two aspects, i.e. inherent quality and appearance quality. Inherent quality includes the indexes such as fiber content, formaldehyde content, pH value, peculiar smell, decomposable carcinogenic aromatic amine dyes, bursting strength, pilling, dimensional change rate in water washing, dimensional change rate by dry cleaning, distortion rate after water washing, color fastness to saliva, color fastness to water, color fastness to perspiration, color fastness to soaping, color fastness to rubbing, color fastness to dry cleaning, color fastness to light, color fastness to light of textiles wetted with artificial perspiration, color fastness to transfer in joints, water-vapour permeability rate, tensile strength of belt, extractable heavy metals content, phthalate content, burning behavior, attached components, filler, appearance quality after water washing or dry cleaning, residual metal needle and anti-pile properties of down garments. The appearance quality includes the indexes such as surface defect, specification and dimension deviation, dimensional difference at symmetric parts, sewing requirements and raw material. 5.2 Grading requirements 5.2.1 The products are classified into superior products, first-grade products and acceptable products in terms of the quality grade. 5.2.2 Grading of quality: The products are graded by batches in terms of inherent quality and by pieces in terms of appearance quality, and the lower grade shall prevail in case of a combination of both. 5.2.3 For all inherent quality indexes, the worst inspection result is regarded as the grading basis for this batch of products. 5.2.4 For the appearance quality with different grades presented by one product, the lowest grade is conducted; no more than two limit surface defects with the same grade are allowed to present on one product, otherwise, this product shall be degraded by one grade. 5.3 Inherent quality requirements 5.3.1 The specific indexes are as detailed in Table 1. Table 1 Inherent quality requirements Item Infants Children Superior product First-grade product Acceptable product Superior product First-grade product Acceptable product Fiber content/% See GB 29862 Formaldehyde content/(mg/kg) See GB 31701 pH value Peculiar smell Decomposable carcinogenic aromatic amine dyes/(mg/kg) Bursting strength/N ≥ — 250 Pilling/grade ≥ 3-4 3 3 3-4 3 3 Dimensional change rate in water washing/% Longitudinal and horizontal -4.0~+2.0 -5.0~+3.0 -4.0~+1.0 -5.0~+2.0 -6.0~+3.0 Dimensional change rate by dry cleaning/% Longitudinal and horizontal — -2.0~+1.5 -3.0~+2.5 Distortion rate after washing/% ≤ Coat and skirt — 4.0 5.0 6.0 Trousers 2.0 3.0 4.0 Color fastness of shell fabric/grade ≥ Fastness to saliva (discoloration, staining) 4 4 4 — Fastness to water (discoloration, staining) 4 3-4 3-4 4 3-4 3 Fastness to perspiration (discoloration, staining) 4 3-4 3-4 4 3-4 3 Fastness to washing with soap or soap and soda (discoloration, staining) 4 3-4 3 4 3-4 3 Fastness to dry rubbing 4 4 4 4 3-4 3 Fastness to wet rubbing 3-4 (3 for deep color) 3 3 (2-3 for deep color) 3-4 (3 for deep color) 3 (2-3 for deep color) 2-3 Fastness to dry cleaning (discoloration, staining) — 4 4 3-4 Fastness to light — 4 4 (3 for light color) 3 Fastness to light of textiles wetted with artificial perspiration (alkaline) — 4 3-4 (3 for light color) 3 Color fastness of lining (grade) ≥ Fastness to saliva (discoloration, staining) 4 4 4 — Fastness to water (discoloration, staining) 4 3-4 3-4 3-4 3-4 3 Fastness to perspiration (discoloration, staining) 4 3-4 3-4 4 3-4 3 Fastness to washing with soap or soap and soda (discoloration, staining) 4 3-4 3 3-4 3-4 3 Fastness to dry rubbing 4 4 4 4 3-4 3 Fastness to wet rubbing 3-4 (3 for deep color) 3 3 (2-3 for deep color) 3-4 (3 for deep color) 3 (2-3 for deep color) 2-3 Color fastness to transfer in joints/grade ≥ 4 4 Water-vapour permeability rate/[g/(m2·24 h)] ≥ 2200 2200 Tensile strength of the garment belt/N ≥ 40 — Extractable heavy metals content/(mg/kg) ≤ Antimony (Sb) 30.0 — Arsenic (As) 0.2 Lead (Pb) 0.2 Cadmium (Cd) 0.1 Chromium (Cr) 1.0 Chromium Cr (VI) 0.5 Cobalt (Co) 1.0 Copper (Cu) 25.0 Nickel (Ni) 1.0 Mercury (Hg) 0.02 Heavy metal content/(mg/kg) Lead (Pb) See GB 31701 Cadmium (Cd) Phthalic acid esters content/% Burning behavior Attached components Filler See GB 31701. Among them, the express value of down filling content, deviation between finished product filling content and express value, down content, down seed content, fluffiness, oxygen consumption, residual fat rate, cleanliness, smell and microbiological indexes shall comply with the quality requirements of fillers given in GB/T 14272. Appearance quality after water washing (dry cleaning) The stitch is not disengaged; the printed (scalded) embroidery parts are free from blistering, peeling and cracking; embroidery cannot be undone without obvious unevenness and the applique is not be disengaged obviously. Buttons, ornaments, zippers and accessories have no obvious distortion, discoloration and rust after being washed. The lining shall be free from eversion and exposure and the lining cloth is free from obvious distortion. There are no defects which affect the appearance quality Residual metal needle No Anti-pile properties of down garments/pcs ≤ 30 For the grading of color, dark color is greater than 1/12 of the standard depth and light color is less than or equal to 1/12 of the standard depth according to GSB 16-2159. 5.3.2 Products with hollow-out (including grenadine or mesh, etc.), rib and burnt-out structures and lace and elastic fabrics are not assessed for bursting strength. Note: Elastic fabric refers to fabric containing elastic fiber, or leno fabric. 5.3.3 Pilling in Table 1 is only assessed for the front of the product, excluding fuzzing, gigging and flocking fabrics as well as lace fabrics. 5.3.4 The horizontal direction of elastic fabrics and the folding direction of folded products is not assessed for dimensional change rate in water washing in Table 1. The dimensional change rate in water washing is not assessed for underpants. 5.3.5 The dimensional change rate by dry cleaning, fastness to dry cleaning and appearance quality after dry cleaning in Table 1 are only assessed for the products noted as "dry cleanable" in the instructions. 5.3.6 The elastic cuff, coats and skirts with non-straight hems, underpants and products designed with special styles are not assessed for distortion rate after water washing. 5.3.7 The outer clothing of children is only assessed for color fastness to light in Table 1. 5.3.8 The single-layer outer garments in direct contact with the skin of children are only assessed for color fastness to light of textiles wetted with artificial perspiration in Table 1. 5.3.9 The spliced products of dark ones with light ones are only assessed for colour fastness to transfer in joints in Table 1. 5.3.10 Natural colour and bleached fabrics are only assessed for fastness to saliva and colour fastness to transfer in joints.

Contents of GB/T 39508-2020

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Sizing and specification 5 Requirements 6 Test methods 7 Sampling rules 8 Judgment rules 9 Instructions, packaging, transportation and storage Bibliography