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GB/T 14797.3-2008 English PDF

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Q: Should I purchase the latest version GB/T 14797.3-2008?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 14797.3-2008 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.

US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 14797.3-2008: Natural rubber latex concentrate -- Prevulcanized rubber latex -- Determination of swelling capacity
Status: Valid

GB/T 14797.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14797.3-2008	139	Add to Cart	3 days	Natural rubber latex concentrate -- Prevulcanized rubber latex -- Determination of swelling capacity	Valid
GB/T 14797.3-1993	199	Add to Cart	2 days	Natural rubber latex concentrate. Prevulcanized rubber latex. Determination of swelling capacity	Obsolete

Similar standards

GB/T 24797.2 GB/T 8140 GB/T 18011 GB/T 14795 GB/T 14796 GB/T 14797.1

Basic data

Standard ID: GB/T 14797.3-2008 (GB/T14797.3-2008)
Description (Translated English): Natural rubber latex concentrate -- Prevulcanized rubber latex -- Determination of swelling capacity
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B72
Classification of International Standard: 83.060
Word Count Estimation: 6,618
Date of Issue: 6/19/2008
Date of Implementation: 12/1/2008
Older Standard (superseded by this standard): GB/T 14797.3-1993
Quoted Standard: GB/T 8290
Regulation (derived from): Announcement of Newly Approved National Standards No. 10, 2008 (No. 123 overall)
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 Determination of the degree of swelling of vulcanized latex. This Standard is applicable to the Brazilian rubber tree produced, high ammonia concentrated latex vulcanized latex prepared saved. This standard does not apply with synthetic latex, and other specialty latex.

GB/T 14797.3-2008: Natural rubber latex concentrate -- Prevulcanized rubber latex -- Determination of swelling capacity

---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.
Natural rubber latex concentrate. Prevulcanized rubber latex. Determination of swelling capacity ICS 83.060 B72 National Standards of People's Republic of China Replacing GB/T 14797.3-1993 Determination of the degree of swelling of natural rubber latex vulcanized latex concentrate Posted 2008-06-19 2008-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This section GB/T Part of 314,797. This Part replaces GB/T 14797.3-1993 "vulcanized latex Natural rubber latex concentrate - Determination of the degree of swelling." This section compared with the GB/T 14797.3-1993, the main differences are as follows. --- 5.6 "blade" on renamed "Squeegee" on; --- Added "1 Squeegee device"; --- Increased Chapter 9. Test report. This section proposed by the People's Republic of China Ministry of Agriculture. This part of the National Rubber and rubber products natural rubber Standardization Technical Committee Technical Committee (SAC/TC35/SC8) Centralized. This section is responsible for drafting units. China Tropical Agricultural Sciences Institute of Agro. The main drafters of this section. Huang Maofang Zhangbei Long, Chen Chenghai. This part of the standard replaces the previous editions are. --- GB/T 14797.3-1993. Determination of the degree of swelling of natural rubber latex vulcanized latex concentrate

1 Scope

GB/T 14797 provisions of this part of the determination of the degree of swelling of the vulcanized latex. This section applies to Hevea brasiliensis produced, vulcanized latex concentrate after high-ammonia latex prepared saved. This section does not apply with synthetic latex, and other specialty latex.

2 Normative references

The following documents contain provisions which, through reference GB/T 14797 in this section, constitute provisions of this part. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 8290 Natural rubber latex concentrate sampling (GB/T 8290-1987, neq ISO 123. 1985) Principle 3 Circular film specimen in toluene than the diameter difference between the original diameter before and after the swelling is calculated as a percentage of the degree of swelling of the film. Film Vulcanization deeper level, the smaller the degree of swelling. Inferred vulcanized latex vulcanization degree of depth according to the degree of swelling.

4 Reagents

4.1 Toluene. chemically pure. 4.2 CMC (carboxymethylcellulose salt). chemically pure. It made 0.15% (mass fraction) CMC aqueous spare. 4.3 Zinc oxide. chemically pure. Made pastes use. Weigh zinc oxide 20g, placed in a mortar, add 0.15% (mass fraction) CMC (4.2) aqueous solution 26mL, Research uniform, now with the current.

5 Apparatus and materials

5.1 qualitative filter paper. Size 600mm × 600mm, 120mm × 600mm cut paper use. 5.2 Belt punch knife. to punch the hole 25mm. 5.3 dish. 90mm. 5.4 standard coordinate paper. Size 10mm × 10mm. 5.5 Oven. Electric Blast, can control the temperature of 40 ℃ ± 1 ℃. 5.6 Squeegee device. with four 3mm thick plexiglass plate made of a rectangular frame size is 100mm × 25mm × 40mm of (Figure 1), with chloroform cement. After opening a box of milling, in a pair of long sides milled long 80mm deep 0.125mm gap; After the opening of another block of milling, in a pair of long sides milled long 90mm deep 0.3mm gap (two in each side of the gap should A large box on the side). 5.7 Preparation of special paper. the 120mm × 600mm strip (5.1) on the glass tile, scraping gum device (5.6) on one end of the strip (120mm edge), after the squeegee side is located below the notch 0.3mm deep, into the box zinc oxide pastes (4.3), slow until evenly distributed Slow moving forward, the paper thus leaving a layer of 0.3mm thick zinc oxide pastes, placed in the oven at 80 deg.] C (5.5) after drying 30min Flatten, cut 120mm × 80mm piece of paper backup. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 14797.3-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 14797.3-2008_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 14797.3-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 14797.3-2008_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.

Question 5: Should I purchase the latest version GB/T 14797.3-2008?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 14797.3-2008 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.