1. Introduction of TQD-01 Air Permeance Tester
Testeur de perméance à l'air TQD-01 is used to determine the air permeance of paper and board in the medium air permeance range using the Schopper method.
The method is applicable to papers and boards having air permeances between1×10-2~1×10²um/（Pa.S）. The method is unsuitable for rough surfaced papers and boards, such as creped and corrugated papers, which cannot be securely clamped to avoid leakage.
Testeur de perméance à l'air TQD-01 can also be used for other materials such as Cement bag paper, paper bag paper, cable paper, copy paper, industrial filter paper, etc.
Air permeance:
Air permeance is the mean flow of air through unit area under unit pressure difference in unit time, under specified conditions.
Air permeance is expressed in micrometres per pascal second [1 μm/(Pa·s)=1mL/(m²·Pa·s)].
2. Advantages of the TQD-01:
High resolution
Uses a classic spectrometer principle
Can test flammable, toxic, and explosive substances
Has a large temperature range
3. Principle
Clamping a test piece between two airtight circular gaskets of known dimensions, with the absolute air pressure on one side of the test area of the test piece equivalent to atmospheric pressure and the difference in pressure between the two sides of the test piece maintained at a small but substantially constant value during the test. Determination of the flow of air through the test area in a specified time.
4. Spécifications techniques
| Plage de test | 1～1000）ml/min or 0~17um/(Pa.s) |
| Zone d'essai | 10±0.2cm² |
| Test Area Pressure Difference | 1±0.01kpa |
| Précision | <100ml volume error 1ml |
| >100ml volume error 5ml | |
| Clamp Ring Inner Diameter | 35.68±0.05mm |
| Clamp Rings Center Coaxiality | <0.05mm |
| Dimensions | 400*300*1200mm |
5. Les normes
ISO 5636-2, ISO 5636-3, ISO 5636-5, GB/T 458, QB/ 1667
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