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TAPPI T 460 OM
Air resistance of paper (Gurley method)
Organization:
TAPPI - TAPPI
Year: 2011
Abstract: This method is used to measure the air resistance of approximately 6.45 sq. cm. (l sq. in.) circular area of paper using a pressure differential of 1.22 kPa. The recommended range of the liquid column instrument is from 5 to 1800 seconds per 100 mL cylinder displacement. For more impermeable papers the time requirements become so excessive that other techniques are preferable.
This method measures the volume of air that passes through the test specimen, along with any possible leakage of air across the surface; therefore it is unsuitable for paper or paperboards which cannot be securely clamped so as to avoid significant surface and/or edge leakage.
For a similar method of measuring air resistance that tests paper at a higher pressure (approx. 3 kPa), and has higher resolution in measuring smaller air volumes, refer to TAPPI T 536. For a method of measuring air permeance at pressures up to 9.85 kPa, using both smaller and larger test areas, refer to TAPPI T 547.
This method measures the volume of air that passes through the test specimen, along with any possible leakage of air across the surface; therefore it is unsuitable for paper or paperboards which cannot be securely clamped so as to avoid significant surface and/or edge leakage.
For a similar method of measuring air resistance that tests paper at a higher pressure (approx. 3 kPa), and has higher resolution in measuring smaller air volumes, refer to TAPPI T 536. For a method of measuring air permeance at pressures up to 9.85 kPa, using both smaller and larger test areas, refer to TAPPI T 547.
Subject: Air permeability
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| contributor author | TAPPI - TAPPI | |
| date accessioned | 2017-09-04T15:37:59Z | |
| date available | 2017-09-04T15:37:59Z | |
| date copyright | 2011.01.01 | |
| date issued | 2011 | |
| identifier other | OWSSKEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=auth=177/handle/yse/39987 | |
| description abstract | This method is used to measure the air resistance of approximately 6.45 sq. cm. (l sq. in.) circular area of paper using a pressure differential of 1.22 kPa. The recommended range of the liquid column instrument is from 5 to 1800 seconds per 100 mL cylinder displacement. For more impermeable papers the time requirements become so excessive that other techniques are preferable. This method measures the volume of air that passes through the test specimen, along with any possible leakage of air across the surface; therefore it is unsuitable for paper or paperboards which cannot be securely clamped so as to avoid significant surface and/or edge leakage. For a similar method of measuring air resistance that tests paper at a higher pressure (approx. 3 kPa), and has higher resolution in measuring smaller air volumes, refer to TAPPI T 536. For a method of measuring air permeance at pressures up to 9.85 kPa, using both smaller and larger test areas, refer to TAPPI T 547. | |
| language | English | |
| title | TAPPI T 460 OM | num |
| title | Air resistance of paper (Gurley method) | en |
| type | standard | |
| page | 7 | |
| status | Active | |
| tree | TAPPI - TAPPI:;2011 | |
| contenttype | fulltext | |
| subject keywords | Air permeability | |
| subject keywords | Air permeance | |
| subject keywords | Air resistance | |
| subject keywords | Densitometer | |
| subject keywords | Density | |
| subject keywords | Porosity |