GB/T 40905.2-2022_English: PDF (GB/T40905.2-2022)
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Textiles -- Quantitative analysis of cashmere, wool, other specialty animal fibres and their blends -- Part 2: Scanning electron microscopy method
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GB/T 40905.2-2022
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| Standard ID | GB/T 40905.2-2022 (GB/T40905.2-2022) | | Description (Translated English) | Textiles -- Quantitative analysis of cashmere, wool, other specialty animal fibres and their blends -- Part 2: Scanning electron microscopy method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | W04 | | Classification of International Standard | 59.080.01 | | Word Count Estimation | 54,593 | | Date of Issue | 2022-10-14 | | Date of Implementation | 2023-05-01 | | Drafting Organization | Inner Mongolia Erdos Resources Co., Ltd., China Textile Standard Inspection and Certification Co., Ltd., Anhui Hanlian Color Textile Co., Ltd., Zhejiang Yilei Wool Textile Co., Ltd., Xiamen Baosili Clean Technology Co., Ltd., Huzhou Fenghua Fashion Co., Ltd., Inner Mongolia Autonomous Region Fiber Quality Monitoring Center, Huizhou College, Jining Fiber Quality Monitoring Center, Zhejiang Yuntai Textile Co., Ltd., Foshan Aisinuo Furniture Co., Ltd., Xinxiang Chemical Fiber Co., Ltd., Dongguan Zhiguo New Material Technology Co., Ltd., Zhongguang Test (Zhongshan) Testing Technology Co., Ltd. | | Administrative Organization | National Textile Standardization Technical Committee (SAC/TC 209) | | Proposing organization | China Textile Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee |
GB/T 40905.2-2022
Textiles -- Quantitative analysis of cashmere, wool, other specialty animal fibres and their blends -- Part 2.Scanning electron microscopy method
ICS 59.080.01
CCS W04
National Standards of People's Republic of China
Textile Cashmere, sheep wool, other special animals
Quantitative analysis of fibers and their mixtures
Part 2.Scanning Electron Microscopy
(ISO 17751-2.2016, MOD)
Published on 2022-10-12
2023-05-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 2
5 Instruments, tools and reagents 2
5.1 Instrument 2
5.2 Tool 2
5.3 Reagent 3
6 Sample extraction 3
7 Specimen Preparation 3
7.1 Number of samples3
7.2 Specimen preparation method 3
7.3 Spray coating of samples 5
8 Test Step 5
8.1 Tests per specimen holder 5
8.2 Qualitative analysis (purity test) and determination of fiber content 5
9 Calculation and representation of test results 5
9.1 Calculation of sample test results 5
9.2 Presentation of test results 6
10 Test report 6
Appendix A (normative) method of extraction of laboratory samples 7
Appendix B (Informative) Surface Morphological Characteristics of Commonly Used Animal Fibers 8
Appendix C (normative) Commonly used animal fiber density values 49
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document is the second part of GB/T 40905 "Quantitative Analysis of Textile Cashmere, Sheep Wool, Other Special Animal Fibers and Their Mixtures"
part. GB/T 40905 has released the following parts.
--- Part 1.Optical microscopy;
--- Part 2.Scanning electron microscopy.
This document is modified using ISO 17751-2.2016 "Textile cashmere, sheep wool, other special animal fibers and their mixtures quantitative
Analysis Part 2.Scanning Electron Microscopy.
This document has the following structural adjustments compared to ISO 17751-2.2016.
--- Added Chapter 2;
---Chapter 3~Chapter 8 correspond to Chapter 2~Chapter 7 of ISO 17751-2.2016;
---9.1 corresponds to Chapter 8 of ISO 17751-2.2016, and 9.2 is added;
--- Added Chapter 10.
The technical differences between this document and ISO 17751-2.2016 and their reasons are as follows.
--- Added the content that woven fabric samples with different warp and weft yarns should be taken apart, weighed and recorded separately (see 7.2.4.1, ISO 17751-2.
6.2.4.1 of.2016) to meet the actual testing and calculation requirements;
--- Modified the description of the third situation after the first sample holder detection (see 8.2.1, 7.2.1 of ISO 17751-2.2016), so that the actual
More comprehensive coverage of the detection situation;
--- Increased the representation of test results (see 9.2) to make the standard content more comprehensive;
--- Added a chapter of test report (see Chapter 10) to make the standard content more comprehensive;
--- Change the nature of Appendix A from "informative" to "normative" (see Appendix A, Appendix A of ISO 17751-2.2016) to make it
It is used in conjunction with the actual test;
--- Changed and increased the density values of some fibers in Appendix C (see Appendix C, Appendix C of ISO 17751-2.2016) to meet the
Daily testing is required.
The following editorial changes have been made to this document.
--- Added note in 3.1;
--- Adjust the note in 8.1 of ISO 17751-2.2016 to the content of the text to amend the expression of the normative appendix in the text;
--- Removed references to ISO 17751-2.2016.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China National Textile and Apparel Council.
This document is under the jurisdiction of the National Textile Standardization Technical Committee (SAC/TC209).
This document is drafted by. Inner Mongolia Erdos Resources Co., Ltd., China Textile Standard Inspection and Certification Co., Ltd., Anhui Hanlian Color
Textile Co., Ltd., Zhejiang Yilei Wool Textile Co., Ltd., Xiamen Baosili Dust-free Technology Co., Ltd., Huzhou Fenghua Fashion Co., Ltd.,
Mongolia Autonomous Region Fiber Quality Monitoring Center, Huizhou University, Jining Fiber Quality Monitoring Center, Zhejiang Yuntai Textile Co., Ltd., Foshan City
Aisino Furniture Co., Ltd., Xinxiang Chemical Fiber Co., Ltd., Dongguan Zhiguo New Material Technology Co., Ltd., Zhongguang Testing (Zhongshan) Testing Technology
Ltd.
The main drafters of this document. Meng Linghong, Zhu Hong, Han Yuru, Hongxia, Ma Haiyan, Gao Lizhong, Yao Miaomiao, Li Xiaomei, Zhang Yi, Tang Xiaomeng,
Ma Chuanshun, Wu Yan, Feng Qianqian, Yang Xiaoling, Xie Yueting, Zeng Xiangsong, He Xiangcheng, Li Zuyong, Mai Yiqiang, Zhang Heng, Xing Shanjing.
introduction
Cashmere fiber is of good quality and expensive, but cashmere and other animal hair fibers such as sheep wool, yak wool, camel hair, etc. have similar properties.
physical and chemical properties, therefore, their mixtures could not be accurately quantified by mechanical or chemical methods in the early days. Moreover, these fibers have the appearance of
The state is also relatively close, and the current detection methods are not easy to accurately quantify.
Research work on the accurate identification of cashmere fibers is ongoing. At present, the widely used and mature technology is the microscope identification
methods, including light microscopy (LM) and scanning electron microscopy (SEM).
--- The advantage of the LM method is that the medulla layer and pigment distribution of the fibers can be observed. The disadvantage of the LM method is that it cannot clearly present a
Some fine surface structures; black samples need to be decolorized; improper decolorization will affect the identification of fibers.
---SEM method and LM method have complementary advantages, so some types of fibers need to be identified by SEM method.
For some difficult-to-determine samples, it is necessary to combine optical microscopy and scanning electron microscopy to take advantage of their respective advantages.
identify.
Practice has proved that the accuracy of quantitative analysis using this method is combined with the rich testing experience of the inspectors (that is, the appearance of various animal fibers).
morphological understanding and familiarity) have a great relationship. Therefore, in addition to the text description, this document also gives a detailed description of the different categories in Appendix B.
The appearance and surface morphology pictures and characteristic descriptions of type animal fibers are provided for the reference of inspectors.
GB/T 40905 is a standard for quantitative analysis of cashmere, sheep wool, other special animal fibers and their mixtures. It consists of two parts.
--- Part 1.Optical microscopy;
--- Part 2.Scanning electron microscopy.
Textile Cashmere, sheep wool, other special animals
Quantitative analysis of fibers and their mixtures
Part 2.Scanning Electron Microscopy
1 Scope
This document specifies the qualitative and quantitative analysis of cashmere, sheep wool, other special animal fibers and their mixtures by scanning electron microscopy
Methods.
This document applies to cashmere, sheep wool, other special animal fibers and their blends, including loose fibers, semi-finished products and finished products.
2 Normative references
There are no normative references in this document.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
special animal fiber specialtyanimalfibre
A general term for hair keratin fibers obtained from other animals other than sheep wool fibers obtained from sheep.
Note. Special animal fibers include cashmere, camel hair, yak hair, mohair, angora rabbit hair, alpaca hair, etc.
3.2
Scanning Electron Microscope
An intermediate microscopic morphological observation instrument between transmission electron microscopes and optical microscopes, using a focused high-energy electron beam
A variety of physical information signals are generated.
Note 1.The principle is to scan the primary focused electron beam over the whole area involved in the solid sample surface, and then receive, amplify and display the signal from this area to
Complete observation of the surface morphological characteristics of the sample.
Note 2.The signals obtained by scanning electron microscopy are secondary electrons (3.3), Auger electrons, characteristic X-rays, etc.
3.3
secondary electron
The low-energy extra-nuclear electrons are released from the metal atoms in the 5nm~10nm scanning region, and the thickness of this region is less than
10nm, the outermost metal coating surface closest to the sample, is an electron beam with an energy of tens of keV under the impact of the initial focusing.
NOTE. Since the mean free path of electrons escaping deep from the sample is small and the surface is sensitive, it is possible to generate clear coated surface fibers with the highest image resolution.
dimensional appearance morphological image.
3.4
scale
The cuticle covering the surface of animal hair fibers.
3.5
Scale density scalefrequency
The number of scales (3.4) per unit length along the axis of the fiber.
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