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GB/T 43184-2023 English PDF

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GB/T 43184-2023: Determination of moisture content of cork
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Basic data

Standard ID GB/T 43184-2023 (GB/T43184-2023)
Description (Translated English) Determination of moisture content of cork
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B69
Classification of International Standard 79.100
Word Count Estimation 10,190
Date of Issue 2023-09-07
Date of Implementation 2024-04-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 43184-2023: Determination of moisture content of cork

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 79.100 CCSB69 National Standards of People's Republic of China Method for determination of moisture content of cork raw materials (ISO 2386.2019,Packedcork-Virgincork,rawreproductioncork, Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is modified to adopt ISO 2386.2019 "Specifications of cork. primary cork, regenerated cork, burnt cork, steamed regenerated cork and non-flushed cork". Determination of moisture content of cork used for pressing. Compared with ISO 2386.2019, this document has many structural adjustments. Comparison list of structure number changes between the two files See Appendix A. The technical differences between this document and ISO 2386.2019 and their reasons are as follows. ---Added terms and definitions such as "burn cork", "steamed cork" and "non-stamping cork" (see Chapter 3) to apply to our country's technology condition; ---Changed the drying time, changing "at least 1h" to "at least 3h" to improve test efficiency (see 6.2, ISO 2386.2019 6.2); ---Added the requirement that the moisture content and the quality of cork raw materials must be kept to 2 decimal places to adapt to my country's technical conditions and facilitate operation and calculation. Calculate (see Chapter 7). The following editorial changes have been made to this document. ---In order to coordinate with my country's technical standard system, the name of the standard was changed to "Method for Determination of Moisture Content of Softwood Raw Materials"; ---Added "References". Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the State Forestry and Grassland Administration. This document is under the jurisdiction of the National Forestry Biomass Materials Standardization Technical Committee (SAC/TC416). This document was drafted by. Northwest Agriculture and Forestry University, Wood Industry Research Institute of the Chinese Academy of Forestry Sciences, Dehua Rabbit Baby Decorative New Materials Co., Ltd., Shaanxi Wanlin Co., Ltd., Baoji Qinbashan Cork Co., Ltd., Shaanxi Provincial Product Quality Supervision and Inspection Institute, Guangdong Product Quality Supervision and Inspection Institute, Deqing Dingsen Quality Technology Inspection Center. The main drafters of this document. Qiu Zengchu, Duan Xinfang, Zhang Li, Ji Xiaodi, Lei Yafang, Sheng Shixiong, Zheng Linyi, Wang Xiaofeng, Zhao Jingfeng, Song Xiaozhou, Li Jingjing, Zhang Ran, Guan Shejun, He Xiaocui, Kang Meng, Wen Fuquan, Chen Ming. Method for determination of moisture content of cork raw materials

1 Scope

This document describes a method for the determination of moisture content of softwood raw materials. This document is applicable to the moisture content of cork raw materials such as primary cork, regenerated cork, burned cork, cooking cork and non-stamping cork. Determination.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 42110-2022 Cork terminology (ISO 633.2019, MOD) Note. There is no technical difference between the quoted content of GB/T 42110-2022 and the quoted content of ISO 633.2019.

3 Terms and definitions

The terms and definitions defined in GB/T 42110-2022 and the following apply to this document. 3.1 burn cork burntcork Cork that has been burned or charred by fire and is not suitable for molding or granulation in the cork industry. [Source. GB/T 42110-2022, 3.1.3.3, with modifications] 3.2 boiled cork boiledcork Cork that has been boiled in clean, additive-free boiling water. 3.3 Non-stamping cork rawcorkwaste Uncooked inferior regenerated cork not suitable for stamping. 3.4 moisture contentmoisturecontent The water mass in the cork accounts for the proportion of the initial mass of the cork raw material (cork) before drying.

4 Principles

The drying and weighing method is used to measure the moisture quality in the cork raw materials, and the initial mass of the cork raw materials before drying is used as the basis to calculate the moisture content of the cork raw materials. of moisture content.

5 Test equipment

5.1 Balance, graduation value shall not be greater than 0.5g.

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