GB/T 41943-2022 English PDF

US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 41943-2022: Natural rubber in bales - Determination of the amount of bale coating
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41943-2022	199	Add to Cart	3 days	Natural rubber in bales - Determination of the amount of bale coating	Valid

Similar standards

GB/T 24797.2   GB/T 37498   GB/T 18011   GB/T 17821   GB/T 41942   

Basic data

Standard ID: GB/T 41943-2022 (GB/T41943-2022)
Description (Translated English): Natural rubber in bales - Determination of the amount of bale coating
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B72
Classification of International Standard: 83.060
Word Count Estimation: 10,126
Date of Issue: 2022-12-30
Date of Implementation: 2023-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41943-2022: Natural rubber in bales - Determination of the amount of bale coating

---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 83.060 CCSB72 National Standards of People's Republic of China Determination of coating quantity of natural rubber rubber coating in bales Determination, MOD) Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 samples 1 4.1 General 1 4.2 Sample preparation 1 5 Ashing method 2 5.1 Principle 2 5.2 Instruments and equipment 2 5.3 Test step 2 6 Brush or scrape method 2 6.1 Brush or scrape method A 2 6.2 Brushing or scraping method B 2 7 results show 2 7.1 Ashing method and brushing or scraping method A 2 7.2 Brushing or scraping method B 3 8 Test report 3 Appendix A (informative) Coating amount of rubber bag 4 Appendix B (Informative) Sample punching die 5 Reference 6

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 for Standardization Documents" drafting. This document is modified to adopt ISO 1434.2016 "Determination of Coating Quantity of Natural Rubber Coating in Packages". Compared with ISO 1434.2016, this document has made the following structural adjustments. --- Added two chapters "Normative References" and "Terms and Definitions" (see Chapter 2, Chapter 3), and the subsequent chapters are numbered sequentially Adjustment; ---Chapter 5 corresponds to Chapter 3 in ISO 1434.2016, where 5.2.5 corresponds to 3.2.6 and 5.2.6 in ISO 1434.2016 3.2.7 of ISO 1434.2016; --- 6.1 corresponds to Chapter 4 of ISO 1434.2016, adding 6.2; ---7.1 corresponds to Chapter 5 of ISO 1434.2016, adding 7.2; ---Appendix A corresponds to Appendix B of ISO 1434.2016, and Appendix B corresponds to Appendix A of ISO 1434.2016. Compared with ISO 1434.2016, this document has many technical differences, and the vertical single Lines (|) are marked. The technical differences and their reasons are as follows. ---Changed the scope expression and deleted the "ashing method is the preferred method" (see Chapter 1, Chapter 1 of ISO 1434.2016), because the gray The precision of the chemical method is not much different from that of the brush or scrape method; --- Changed the sample preparation regulations (see 4.2, 2.2 of ISO 1434.2016) to simplify the requirements; --- Changed the principle of the ashing method (see 5.1, 3.1 of ISO 1434.2016) to make the expression more reasonable; ---Changed the volume of the crucible (see 5.2.2, 3.2.2 of ISO 1434.2016) to comply with commercially available specifications; --- Changed the accuracy of the analytical balance (see 5.2.3, 3.2.3 of ISO 1434.2016) to meet the requirements of the test procedure; --- Deleted "Bunsen burner" (see 3.2.4 of ISO 1434.2016) and "dryer" (see ISO 1434.2016) in "instrument" 3.2.5), adding a balance with an accuracy of 0.1g (see 5.2.4) to adapt to the change of the test procedure; ---Changed the test procedure (see 5.3, 3.3 of ISO 1434.2016) to enhance operability and facilitate the application of this document; --- The normative reference document GB/T 4498.1-2013 (see 5.3) has been added to refer to the ready-made method in the test procedure; --- Added a test procedure (see 6.2) and result presentation (see 7.2) of a brushing or scraping method for selection; --- Increase the rounding off requirements of test results (see Chapter 7) to improve the operability of judgment; --- Delete the allowable difference (see Chapter 5 of ISO 1434.2016) to conform to the actual situation in our country. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Petroleum and Chemical Industry Federation. This document is sponsored by the National Rubber and Rubber Products Standardization Technical Committee Natural Rubber Sub-Technical Committee (SAC/TC35/SC8) Focus on. This document was drafted by. Institute of Agricultural Products Processing, Chinese Academy of Tropical Agricultural Sciences, Shanghai Customs Industrial Products and Raw Materials Testing Technology Center Center, Hainan Natural Rubber Quality Inspection Station. The main drafters of this document. Li Yimin, Yang Juan, Zhou Shixiong, Lu Guang, Chen Min, Yang Chunliang, Yang Li. Determination of coating quantity of natural rubber rubber coating in bales Caution --- Personnel using this document need to have practical experience in formal laboratory work. This document does not address all possible security issues question. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations.

1 Scope

This document describes two methods for the determination of the coating weight of bales on films used for overwrapping natural rubber bales. --- Ashing method; ---Brush or scrape method. The ashing method is suitable for the determination of the amount of rubber coating that is not affected by ashing. The brushing or scraping method is suitable for the determination of the amount of rubber coating on the rubber surface without holes. Note 1.For coatings containing carbonates or organic substances that will be affected by ashing, the measurement results of the ashing method will be low. Note 2.Although the brushing or scraping method is faster, for rubber with holes on the surface, since the coating material will penetrate into the holes, using this method will make the coating difficult take out.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 4498.1-2013 Determination of Rubber Ash Content Part 1.Muffle Furnace Method (ISO 247.2006, MOD)

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 samples

4.1 General The larger the number of samples taken, the more representative of the batch of goods. In most cases, reasonable limits should be set according to the actual situation. The number of plastic bales randomly selected shall be agreed upon by the supplier and the purchaser. NOTE. When applicable, statistical sampling plans selected from ISO 3951-2 can be used. 4.2 Sample preparation Randomly select the film for wrapping from any three adjacent sides of the plastic bag, one film for each side, and then use the sample punching die (5.2.1) Punch out three test pieces of 50mm×50mm respectively. If the ashing method is used, the thickness of the sample should not exceed 4mm. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 41943-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 41943-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 41943-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 41943-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.