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GB/T 21885-2008 English PDF

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US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21885-2008: Textile auxiliaries -- Defoaming agents -- Determination of the defoaming efficiency
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21885-2008	139	Add to Cart	3 days	Textile auxiliaries -- Defoaming agents -- Determination of the defoaming efficiency	Valid

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Basic data

Standard ID: GB/T 21885-2008 (GB/T21885-2008)
Description (Translated English): Textile auxiliaries -- Defoaming agents -- Determination of the defoaming efficiency
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G70
Classification of International Standard: 71.100.40
Word Count Estimation: 6,631
Date of Issue: 2008-05-15
Date of Implementation: 2008-11-01
Quoted Standard: GB/T 6682
Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the determination of defoaming effect in textile auxiliaries. This standard applies silicone textile printing and dyeing auxiliaries in, determination of polyether (ester) class and other water-based defoaming effect.

GB/T 21885-2008: Textile auxiliaries -- Defoaming agents -- Determination of the defoaming efficiency

---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.
Textile auxiliaries. Defoaming agents. Determination of the defoaming efficiency ICS 71.100.40 G70 National Standards of People's Republic of China Textile auxiliaries defoamer Determination of anti-foaming effect Posted 2008-05-15 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Appendix A of this standard is a normative appendix. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Dye (SAC/TC134) centralized. This standard was drafted. Zhejiang Chuan Co., Ltd., Shenyang Chemical Research Institute. The main drafters of this standard. Wang Shengpeng, Hongmei to awakening, Kiran piano. Textile auxiliaries defoamer Determination of anti-foaming effect

1 Scope

This standard specifies the method for determination of defoamers defoaming textile printing and dyeing auxiliaries. This standard applies to silicone, textile auxiliaries measured polyether (ester) class and other water-based defoamers defoaming in.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) Principle 3 A flow rate of the gas through a certain amount of the test solution, the formation of foam in the container. When the gas flow rate is fixed, and use the same instrument Foam height when in dynamic equilibrium, so this amount includes antifoaming and defoaming two properties. Test Method 4 4.1 Determination of anti-foaming effect (instrument method) dynamic defoaming method 4.1.1 Reagents and solutions Unless otherwise specified, use only confirm three qualified chemical water and GB/T 6682 specified in analytical grade and commercially available reagents. a) bubbling liquid The mass fraction of 0.5% sodium dodecyl benzene sulfonate and the mass fraction of 0.5% TX-10 with 1.1 (by volume) ratio Example uniformly mixed dubbed foaming liquid. Note. The preparation of the bubbling liquid may vary according to the actual application prior selection and preparation. b) a certain concentration of anti-foaming liquid Press defoamers active content meter, according to the needs of different concentrations dubbed as defoamers defoaming aqueous solution. 4.1.2 instruments and equipment a) Electronic balance (accuracy 0.1mg); b) beaker, 150mL; c) constant temperature water bath, 0 ℃ ~ 100 ℃; d) foam tester (schematic see Appendix A); e) glass rotor flow meter, 0 ~ 0.600m3/h; f) clean air source, the output pressure 0 ~ 1.0MPa; g) stopwatch. 4.1.3 Analysis of step In accordance with Appendix A schematic diagram of the respective devices connected to the foam tester, turn the thermostat is set to a predetermined temperature water bath, turn on the foam test Tester circulating jacketed reflux, then began to make the determination when the jacket temperature reaches a predetermined temperature. Open source of clean air, check all instruments ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21885-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21885-2008_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 21885-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21885-2008_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.