Standard No.:	GB/T 40351-2021
English Name:	Ecological technical requirements for recycled Poly(ethylene terephthalate) fiber
Chinese Name:	循环再利用涤纶生态技术要求
Chinese Classification:	W50    Chemical fibre in general
Professional Classification:	GB    National Standard
ICS Classification:	59.060.20 59.060.20    Man-made fibres 59.060.20
Issued by:	SAMR; SAC
Issued on:	2021-08-20
Implemented on:	2022-3-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	10500 words
Price(USD):	315.0
Delivery:	via email in 1 business day

GB/T 40351-2021 Ecological technical requirements for recycled Poly(ethylene terephthalate) fiber 1 Scope This document specifies the terms and definitions, ecological technical requirements, test methods, sampling regulations and judgment rules of recycled Poly (ethylene terephthalate) fiber (hereinafter referred to as recycled Poly fiber). This document is applicable to natural and colored recycled Poly fiber, and it may be used as a reference for other functional recycled Poly fibers. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions 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 2912.1 Textiles—Determination of formaldehyde—Part 1: Free and hydrolyzed formaldehyde (Water extraction method) GB/T 4146 (all parts) Textiles—Man-made fibers GB/T 5750.10 Standard examination methods for drinking Water—Disinfection by-products parameters GB/T 6682 Water for analytical laboratory use—Specification and test methods GB/T 7573 Textiles—Determination of pH of aqueous extract GB/T 17592 Textiles—Determination of the banned azo colourants GB/T 17593.2 Textiles—Determination of heavy metals—Part 2: Inductively coupled plasma atomic emission spectrometry GB/T 17593.3 Textiles—Determination of heavy metals—Part 3: Chromium(VI)—Spectrophotometry GB/T 17593.4 Textiles—Determination of heavy metals—Part 4: Arsenic and mercury—Atomic fluorescence spectrophotometry GB/T 18204.2 Examination methods for public places—Part 2: Chemical pollutants GB 18401-2010 National general safety technical code for textile products GB/T 20382 Textiles―Determination of carcinogenic dyestuffs GB/T 20383 Textiles―Determination of allergenous disperse dyestuffs GB/T 20384 Textiles—Determination of the residual chlorobenzenes and chlorinated toluenes   GB/T 20386 Textiles—Determination of the content of ortho-phenylphenol GB/T 20388 Textiles—Determination of the phthalate content—Tetrahydrofuran method GB/T 23322 Textiles—Determination of surfactant—Alkylphenols and alkylphenol ethoxylates GB/T 23344 Textiles—Determination of 4-aminoazobenzene GB/T 23345 Textiles—Determination of dyestuffs of disperse yellow 23 and disperse orange 149 GB/T 24281 Textiles—Determination of volatile organic compounds—Gas chromatography/mass spectrography GB/T 28189 Textiles—Determination of polycyclic aromatic hydrocarbons FZ/T 52052 Low melting point polyester (LMPET) / recycled polyester (RPET) bicomponent staple fiber 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 4146 (all parts), GB/T 24281, FZ/T 52052 and the following apply. 3.1 recycled Poly (ethylene terephthalate) fiber fiber made by old polyethylene terephthalate (PET) materials after recycled 4 Ecological technical requirement See Table 1 for the performance index items of ecological technical requirements and limit requirements of recycled Poly fiber. Table 1

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Ecological technical requirement 5 Test methods 6 Sampling requirements 7 Judgment rules Annex A (Normative) Residual harmful chemicals Annex B (Normative) Polycyclic aromatic hydrocarbons Annex C (Normative) Phthalate Annex D (Normative) Chlorobenzenes and chlorinated toluenes Annex E (Normative) Harmful dyestuffs Annex F (Normative) Test method for benzene series volatile organic compounds—Headspace-gas chromatography Annex G (Normative) Test method for aldehyde series volatile organic compounds—Headspace-gas chromatography