GB/T 21992-2008 English PDF

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GB/T 21992-2008: Polyvinyl chloride resins for Paste -- Determination of number of impurities particles and foreign particles
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21992-2008	149	Add to Cart	2 days	Polyvinyl chloride resins for Paste -- Determination of number of impurities particles and foreign particles	Valid

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Basic data

Standard ID: GB/T 21992-2008 (GB/T21992-2008)
Description (Translated English): Polyvinyl chloride resins for Paste -- Determination of number of impurities particles and foreign particles
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G32
Classification of International Standard: 83.080.20
Word Count Estimation: 5,596
Date of Issue: 2008-06-04
Date of Implementation: 2008-12-01
Older Standard (superseded by this standard): GB/T 12004.1-1989
Adopted Standard: �������� 14039-1978 (1984), NEQ
Regulation (derived from): National Standard Approval Announcement 2008 No.9 (Total No.122)
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 measurement principle Paste PVC resin impurities and foreign particles number, the instruments and materials, operating procedures and the results of said content. This standard applies to the determination of paste PVC resin particles of impurities and foreign.

GB/T 21992-2008: Polyvinyl chloride resins for Paste -- Determination of number of impurities particles and foreign particles

---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.
Polyvinyl chloride resins for Paste. Determination of number of impurities particles and foreign particles ICS 83.080.20 G32 National Standards of People's Republic of China Replacing GB/T 12004.1-1989 Paste PVC resin Determination of number of impurities and foreign particles Posted 2008-06-04 2008-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard corresponds to ГOCT14039-1978 (RU) (1984 Confirmafion) "emulsion PVC resin" in 3.4, and ГOCT14039-1978 of non-equivalent. This standard replaces GB/T 12004.1-1989 "PVC paste resin measured in the number of particles of impurities." This standard and GB/T 12004.1-1989 The main differences are as follows. --- Modify the standard name; --- Removed dioctyl phthalate esters with silk filter requirements (1989 Version 4.1); --- Increased quality requirements octyl phthalate (edition 3.6). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of plastic PVC resin product Club (SAC/TC15/SC7) centralized. This standard was drafted. Jinxi Chemical Industry Research Institute. The main drafters of this standard. Lijuan, Hao Jing, Chenpei Yun, Tan Chen. This standard was first published in 1989. Please note that some of the content of this standard may involve patents, the issuing authority of this standard should not bear the responsibility to identify these patents. Paste PVC resin Determination of number of impurities and foreign particles

1 Scope

This standard specifies the measurement principle paste PVC resin impurities and foreign particles number, the equipment and materials, steps and knot If representation and so on. This standard applies to the determination of paste PVC resin impurities and foreign particles number. Principle 2 Paste PVC resin and phthalate Dioctyl to scale stirred into a homogeneous paste, salivation in a certain area of \u200b\u200bthe glass template On a film after heating, count 240mm × 240mm film visible impurities and foreign particles on the number of detected cases.

3 Instruments and Materials

3.1 glass template, the board 260mm × 260mm, the template center 240mm × 240mm × (0.4 ~ 0.5) mm in the cavity, no Color, transparency, no bubbles and defects like the color point 1). 1) If the defect is taken into account in the detection count. 3.2 Detection Kit, 260mm × 260mm × 260mm, no catchy cover, consistent with the glass template, template 200mm at the bottom of the glass from the device There is a 60W incandescent bulb. 3.3 oven can be controlled at (130 ± 2) ℃, with natural ventilation or low circulating fan. 3.4 mortar. 3.5 scraper. 3.6 Balance, accurate to 0.1g. 3.7 octyl phthalate, GB/T 11406-2001, first-class goods.

4 steps

4.1 Weigh-octyl phthalate (25 ± 2) g in a dry cleaner in a mortar, add (25 ± 0.1) g sample stirred into a homogeneous paste, quiet Means (10 ~ 15) min. 4.2 Weigh the paste (40 ± 1) g on the glass templates, or by tilting the blade so that it is uniformly distributed in the cavity, the level of standing After (10 ~ 15) min, the template is placed (130 ± 2) ℃ in the oven, heating 15min. 4.3 Remove the template cooling on the test box, in the box under light irradiation, visually count 240mm × 240mm film visible miscellaneous The quality and the number of foreign particles. Note. operator training is completed within a maximum count 2min operator to avoid eyestrain.

5 The results are shown

5.1 Each sample was measured twice, the number of impurities and foreign particles P arithmetic average of the two measured values \u200b\u200bof said case into a decimal integer Number, according to equation (1) calculations. ......

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