GB/T 21990-2008Polyvinyl chloride (PVC) pastes - Determination of fineness of grind (English PDF)
聚氯乙烯（PVC）糊 刮板细度的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 4, 2008
Implementation date
December 1, 2008
Scope
GB/T 21990-2008 is the English-translated version of 聚氯乙烯（PVC）糊 刮板细度的测定.
GB/T 21990-2008 is the Chinese standard "Polyvinyl chloride (PVC) pastes - Determination of fineness of grind". Its scope clause reads: This standard specifies the method for the determination of particle size of PVC paste coarse grind with a scraper.
This standard applies to the determination of PVC paste coarse particle size. Principle 2 PVC paste is placed on the measuring device, scratches appear by moving the blade, testing PVC paste coarse particle size.
Its clauses include terms and definitions; instrument; fineness gauge schematic diagram.
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Document preview — GB/T 21990-2008
National Standard of the People's Republic of China
- ICS
- 83.080.20
- Classification
- G 32
- Replacing
- GB/T 12004.5-1992
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 3 Terms and Definitions
- 4 Instrument
- 1 Fineness gauge schematic diagram
1 Scope
This standard specifies the method for the determination of particle size of PVC paste coarse grind with a scraper.
This standard applies to the determination of PVC paste coarse particle size.
Principle 2
PVC paste is placed on the measuring device, scratches appear by moving the blade, testing PVC paste coarse particle size.
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Resin in an organic liquid of a uniform dispersion.
4 Instrument
4.1
Fineness gauge by the measuring device and the blade (see Figure 1). Should be selected according to the measured resin particle size and scope.
Millimeters a) measuring b) scraper
1 Fineness gauge schematic diagram
5 measuring step 5.1 The measuring device with a clean silk, placed on a horizontal surface.
5.2
sufficient amount of PVC paste slowly poured measuring chute deep end so a little overflow chute.
5.3
hands clenched scraper, placed vertically at the edge of the sample measuring the deep end of the chute, scraper blade and the width measuring device parallel to ensure that the blade and the […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 21990
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 21990-2008 | Polyvinyl chloride (PVC) pastes - Determination of fineness of grind | current edition | Current |
| GB/T 12004.5-1992 | Polyvinyl chloride (PVC) pastes - Determination of fineness of grind | previous edition | Superseded |
This page sells the current edition, GB/T 21990-2008. Earlier editions are listed for reference only.
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