GB/T 3781.9-2025 English PDFGB/T 3781.9: Historical versions
Basic dataStandard ID: GB/T 3781.9-2025 (GB/T3781.9-2025)Description (Translated English): Acetylene black - Part 9: Determination of resistivity Sector / Industry: National Standard (Recommended) Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 3781.9-2019 GB/T 3781.9-2019: Acetylene black -- Part 9: Determination of resistivity---This is a DRAFT version for illustration, not a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.Acetylene black - Part 9. Determination of resistivity ICS 83.040.20 G49 National Standards of People's Republic of China Replace GB/T 3781.9-2006 Acetylene black - Part 9. Determination of resistivity Published on.2019-08-30 2020-07-01 implementation State market supervision and administration China National Standardization Administration issued ForewordGB/T 3781 "acetylene black" is divided into the following parts. ---Part 5. Determination of coarse fractions; ---Part 6. Determination of apparent specific volume; ---Part 8. Determination of the amount of hydrochloric acid absorbed; --- Part 9. Determination of resistivity. This part is the ninth part of GB/T 3781. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 3781.9-2006 "acetylene black black part 9. determination of electrical resistivity", and GB/T 3781.9-2006 The main technical changes are as follows. ---Modified normative references (see Chapter 2); --- Removed the "Note" of 5.1; --- Change the drying temperature of the sample from (105 ± 2) °C to (125 ± 2) °C (see 5.2, 7.2); --- Modified "slowly add 50cm3 dibutyl phthalate" as "using a cylinder to measure 50cm3 dibutyl phthalate slowly Join" (see 7.4); --- Added "other speeds can be used if the parties agree," to apply to more needs (see 7.7); --- Added "End of test, wash the cell with ethanol, stand by" (see 7.9). This part was proposed by the China Petroleum and Chemical Industry Federation. This part is under the jurisdiction of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35). This section drafted by. Shandong Nster Carbon Black Co., Ltd., Zhonghao Heiyuan Chemical Research and Design Institute Co., Ltd., Qingdao Black Cat Charcoal Technology limited liability company. The main drafters of this section. Zhang Jianmin, Liu Jian, Wang Hong, Nie Suqing. The previous versions of the standards replaced by this section are. --- GB/T 3781.9-1983, GB/T 3781.9-1993, GB/T 3781.9-2006. Acetylene black - Part 9. Determination of resistivity Cautions - Personnel using this section should have hands-on experience in formal laboratory work. This section does not point out all possible security questions. question. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set by the relevant national regulations.1 ScopeThis part of GB/T 3781 specifies the method for determining the electrical resistivity of acetylene black. This section applies to acetylene black.2 Normative referencesThe 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. GB/T 3780.8 Carbon black - Part 8. Determination of heat loss GB/T 3782 acetylene black GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values GB/T 12804 laboratory glass instrument cylinder GB/T 12827 standard reference acetylene black and identification method3 PrincipleThe sample is placed in a basic insulating dibutyl phthalate, which is dispersed uniformly and formed into a stable shape by the action of a power agitator. The fixed suspension measures the resistivity of the suspension to characterize the strength of the conductivity.4 reagents and materials4.1 Dibutyl phthalate, analytically pure. 4.2 Ethanol, 95% by volume, chemically pure. 4.3 Standard reference acetylene black, SRAB1, GB/T 12827.5 instruments5.1 Resistivity meter, accurate to 0.01 Ω·m. The cell specifications are shown in Figure 1. 5.2 Oven, gravity convection type, temperature can be controlled at (125 ± 1) °C, temperature uniformity ≤ ± 5 °C. 5.3 Vacuum dryer with an effective desiccant. 5.4 Analytical balance with a resolution of 0.1 mg. 5.5 Measuring cylinder, capacity 50cm3, accuracy 1cm3, in line with GB/T 12804A. 5.6 beaker, 150cm3, inner diameter 55mm. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 3781.9-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 3781.9-2025_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 3781.9-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 3781.9-2025_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+ countriesQuestion 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.Question 5: Should I purchase the latest version GB/T 3781.9-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 3781.9-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
