GB/T 458-2008 Translated English of Chinese Standard. (GBT 458-2008, GB/T458-2008, GBT458-2008): Paper and board - Measurement of air permeancehttps://www.chinesestandard.net, 7 dec. 2016 - 20 sidor This standard specifies three methods for the measurement of air permeance of paper and board: Gurley method, Schopper method, and Bendtsen method. |
Vanliga ord och fraser
50 mL interval accordance with GB/T accurate air passing air permeance tester appearance defects arithmetic mean ARRANGE one operator back side chloroprene CLAMP coefficient of variation conduct measurement conducted in accordance Connection plate constant pressure difference CUT one specimen Figure A.2 five samples flowmeter front side gasket hole humidity treatment inner cylinder inner diameter kilopascal kinematic viscosity liner mean value measurement probe Measurement procedures measurement results measurement surface metal strip mL/min Needle valve operator to conduct outer cylinder paper and board paperboard Pascal seconds positioning channel Precision TAKE Preparation of test provisions of GB/T report such difference required to report respectively CUT respectively report Result calculation samples and back SANDWICH sealing liquid side respectively significant difference significant digits soap bubble meter splint Standard atmosphere TAKE two specimens taken in accordance temperature and humidity test area Test duration test specimens test zone three-way switch treatment for sample vacuum tube volume meter zero scale