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GB/T 38138-2019 English PDF

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GB/T 38138-2019: Test methods of fiber grade polycaprolactam (PA6) chip
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PDF similar to GB/T 38138-2019


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Basic data

Standard ID GB/T 38138-2019 (GB/T38138-2019)
Description (Translated English) Test methods of fiber grade polycaprolactam (PA6) chip
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard W50
Classification of International Standard 59.060.20
Word Count Estimation 30,327
Date of Issue 2019-10-18
Date of Implementation 2020-05-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 38138-2019: Test methods of fiber grade polycaprolactam (PA6) chip

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Test methods of fiber grade polycaprolactam(PA6)chip ICS 59.060.20 W50 National Standards of People's Republic of China Fiber-grade polycaprolactam (PA6) section test method Published on.2019-10-18 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General Rules of Test 2 5 Test method 2 5.1 Moisture content 2 5.1.1 Method A (Karl Fischer Volume Method) 2 5.1.2 Method B (Karl Fischer Coulomb method) 3 5.1.3 Method C (pressure difference method) 4 5.2 Relative viscosity 4 5.3 Hot water extractables content 7 5.3.1 Method A (gravimetric method) 7 5.3.2 Method B (Soxhlet extraction refractometry) 8 5.4 Titanium dioxide content 10 5.5 Amino content 12 5.5.1 Method A (potentiometric titration---trifluoroethanol system) 12 5.5.2 Method B (potentiometric titration---m-cresol-isopropanol system) 14 5.6 Carboxyl content 15 5.6.1 Method A (potentiometric titration) 15 5.6.2 Method B (Capacity Method) 16 5.7 Melting point 18 5.7.1 Method A (Differential Scanning Calorimetry) 18 5.7.2 Method B (polarized microscopy) 19 5.8 Appearance 19 5.9 Ash 19 6 Test report 19 Appendix A (Normative) Test Method for Testing Moisture Content by Differential Pressure Method 21 Appendix B (Normative) Test Method for Testing Melting Point by Polarized Microscopy 23 Appendix C (normative appendix) Test method for ash 24

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the China National Textile and Apparel Council. This standard was drafted. Shanghai Textile Group Testing Standard Co., Ltd., Shanghai Textile Industry Technology Supervision Institute, Zhejiang Hengyi Nylon Company, Guangdong Xinhui Meida Nylon Co., Ltd., Fujian Jinjiang Technology Co., Ltd., Zhejiang Huajian Nylon Co., Ltd., Changle Hengshen Fiber Technology Co., Ltd., Jiangsu Jiangshan Honghua Fiber Co., Ltd., Jiangsu Haiyang Chemical Fiber Co., Ltd., Hangzhou Polymer Shun New Materials Co., Ltd. Company, Jiangsu Hongsheng New Materials Co., Ltd., Yiwu Huading Nylon Co., Ltd., Hengtian Zhongfangfanghuan Wuxi Co., Ltd., Weihaide Rui Synthetic Fiber Co., Ltd., China Chemical Fiber Industry Association. The main drafters of this standard. Zhuang Yingxiao, Li Hongjie, Hu Nian, Wang Gan, He Shaofeng, Liu Bingling, Yu Jianpeng, Wang Juan, Cao Jianpeng, Ji Zengming, Li Xiaoguang, Liu Guo, Zhang Xuehua, Zhao Ling, Zhang Zhiwen, Zhang Zikai, Yang Naiqian, Jin Zhixue. Fiber-grade polycaprolactam (PA6) section test method Warning - solvents such as m-cresol, isopropanol, methanol, trifluoroethanol, etc. used in the test method are toxic, and should avoid contact with skin and suction. Into the vapor; reagents such as sulfuric acid, hydrochloric acid, hydrogen peroxide and the like are highly corrosive and should be avoided from contact with the skin. The operator should take appropriate safety and health Protective measures.

1 Scope

This standard specifies the test method for fiber grade polycaprolactam (PA6) sections. This standard applies to fiber-grade polycaprolactam (PA6) chips produced from caprolactam as raw materials, other differential, functional fiber grades. Polycaprolactam (PA6) sections can be used as reference.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Preparation of GB/T 601 chemical reagent standard titration solution Preparation of preparations and products used in GB/T 603 chemical reagent test method GB/T 625 chemical reagent sulfuric acid GB/T 4146 (all parts) textile chemical fiber General rules for sampling GB/T 6678 chemical products GB/T 6682 Analytical laboratory water specifications and test methods GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values GB/T 28212 laboratory glass instrument condenser ISO 3105 Glass Capillary Viscometer Specifications and Operating Instructions (Glasscapilarykinematicviscometers- Specificationsandoperatinginstructions)

3 Terms and definitions

The following terms and definitions defined in GB/T 4146 (all parts) apply to this document. 3.1 Light polycaprolactam slice brightpolycaprolactamchip A polycaprolactam slice having a titanium dioxide content (mass fraction) of less than or equal to 0.05%. 3.2 Semi-dull polycaprolactam slice semi-dulpolycaprolactamchip A polycaprolactam slice having a titanium dioxide content (mass fraction) greater than 0.10% and less than or equal to 0.60%. 3.3 Full-dull polycaprolactam slice ful-dulpolycaprolactamchip A polycaprolactam slice having a titanium dioxide content (mass fraction) greater than or equal to 1.20%.

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