This standard specifies the terms and definitions, product identification, technical requirements, test methods, inspection rules and markings, packaging, transportation, and storage requirements of polyethylene terephthalate/polyethylene terephthalate (PTT/PET) composite drafting wire.

This standard is applicable to linear density of 20 dtex~700 dtex, single filament linear density of 1.2 dtex~5.5 dtex, glossy, semi dull, natural color polyethylene terephthalate/polyethylene terephthalate (PTT/PET) parallel composite drafting wire

Normative references

The following documents are essential for the application of this document.

. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document

GB/T 250 Textiles - Color Fastness Testing - Grey Sample Card for Evaluating Discoloration

GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes: Part 1: Acceptance Quality Limit (AQL) Retrieved Batch by Batch Inspection Sampling Plan

GB/T 3291.1 Textile Materials - Performance and Testing Terminology - Part 1: Fibers and Yarns

GB/T 3291.3 Textile Materials - Performance and Testing Terminology - Part 3: General

GB/T 4146.1 Textile Chemical Fibers - Part 1: Generic Names

GB/T 4146.3 Textile Chemical Fibers - Part 3: Inspection Terminology

GB/T 6502 Chemical Fiber Filament Sampling Method

GB /T 6504 Test Method for Oil Content of Chemical Fibers

GB/T 6505 Test Method for Thermal Shrinkage of Chemical Fiber Filaments

GB/T 6506 Test Method for Shrinkage Performance of Synthetic Fiber Textured Filaments

GB/T 6508 Test Method for Dyeing Uniformity of Polyester Filaments

GB/T 8170 Rules for Rounding off Values and Representation and Determination of Limit Values

GB/T 14343 Test Method for Linear Density of Chemical Fiber Filaments

GB/T 14344 Chemical Fiber Test Method for Tensile Properties of Fibers

FZ/T 50001 Test Method for Network Degree of Synthetic Fibers

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China