DE310058C - - Google Patents
Info
- Publication number
- DE310058C DE310058C DENDAT310058D DE310058DA DE310058C DE 310058 C DE310058 C DE 310058C DE NDAT310058 D DENDAT310058 D DE NDAT310058D DE 310058D A DE310058D A DE 310058DA DE 310058 C DE310058 C DE 310058C
- Authority
- DE
- Germany
- Prior art keywords
- container
- air
- barometer
- pressure
- air permeability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 210000003739 neck Anatomy 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Fiber Materials (AREA)
Description
Es ist bekannt, die Luftdurchlässigkeit von Stoffen, insbesondere von Geweben, durch Saugluft zu bestimmen, und zwar mit Hilfe hinter dem Stoff eingeschalteter, luftleerer Behälter, wobei die Druckdifferenz durch Barometer festgestellt und aus dieser bestimmte Vergleichszahlen festgelegt werden.It is known that the air permeability of fabrics, in particular fabrics, by To determine suction air, with the help of vacuum switched on behind the fabric Container, the pressure difference determined by barometer and determined from this Comparative figures are set.
Die Erfindung betrifft ein Verfahren zur Bestimmung der Luftdurchlässigkeit,. beiThe invention relates to a method for determining air permeability. at
ίο welchem ebenfalls Saugluft verwendet wird, welches sich für Stoffe aller Art, wie Baumaterialien usw. gleich vorteilhaft eignet.ίο which suction air is also used, which is equally suitable for substances of all kinds, such as building materials, etc.
Das Neue besteht bei diesem Verfahren darin, daß die Luftdurchlässigkeit aus der Rückkehrzeit des Druckes in einem mit dem zu messenden Material in Verbindung gebrachten, luftleeren Behälter zum Barometerdruck festgestellt wird.The novelty in this process is that the air permeability from the Return time of the pressure in a material associated with the material to be measured, evacuated container is determined to the barometric pressure.
Die Zeichnung zeigt eine beispielsweise, im wesentlichen bekannte Ausführungsform des zur Ausführung vorstehenden Verfahrens dienenden Apparates im Längsschnitt.The drawing shows an example, essentially known embodiment of the for the execution of the above process serving apparatus in longitudinal section.
α ist dabei das zu untersuchende Material, das z. B. durch Gummibänderung b auf einem Trichter c festgehalten wird. Dieser Trichter c sitzt im Halse einer Klärfläche d, die mit dem. Behälter, z. B. einer Flasche, e durch ein Glasrohr f verbunden ist. : Diese Verbindüng kann durch den Hahn g unter brochen werden. Der Behälter e besitzt zwei Hälse, von denen der eine h mit einer nicht dargestellten Luftpumpe, der andere i mit einem Heberbarometer k in Verbindung steht. α is the material to be examined, the z. B. is held in place by elastic band b on a funnel c . This funnel c sits in the neck of a clarifying surface d, which with the. Container, e.g. B. a bottle, e is connected by a glass tube f . : This connection can be interrupted by tap g . The container e has two necks, one of which h is connected to an air pump (not shown) and the other i to a siphon barometer k .
Die Bestimmung der Porosität irgendeines Materials geschieht nun wie folgt: 3^The determination of the porosity of any material is now done as follows: 3 ^
Die \rerbindung / der Klärflasche d mit dem Behälter e wird durch Schließen des Hahnes g unterbrochen und der Behälter e durch die Pumpe evakuiert, und zwar so weit, bis das Barometer k nur mehr die Hälfte des Luftdruckes der Umgebung zeigt.The \ r Getting Connected / Klärflasche of d e to the container is evacuated interrupted and the container E through the pump, namely so far that the barometer k only half of the air pressure around shows g by closing the cock.
Hierauf wird der Hahn g geöffnet und die Zeit gemessen, in der durch die Kommunikation der Außenluft durch die Poren der Ton- · zelle das Barometer wieder auf den Ursprung- 4^ liehen. Stand zeigt. Ist t diese Zeit, N die Anzahl der Poren pro Quadratzentimeter und b der Barometerstand, so gilt annähernd:Then the tap is open g and the time in which the communication by the outside air through the pores of the clay · the barometer cell back to the Ursprung- 4 ^ borrowed. Booth shows. If t is this time, N is the number of pores per square centimeter and b is the barometer reading, the following applies approximately:
N= cN = c
t t ''
d. h. die Porenflächen prd Quadratzentimeter verhalten sich -jeweils umgekehrt wie die Rückkehrzeiten t, that is, the pore areas per square centimeter behave - in each case inversely to the return times t,
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE310058C true DE310058C (en) |
Family
ID=563169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT310058D Active DE310058C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE310058C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080083365A1 (en) * | 2006-10-05 | 2008-04-10 | Survival Systems International, Inc. | Lifeboat disengagement system |
-
0
- DE DENDAT310058D patent/DE310058C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080083365A1 (en) * | 2006-10-05 | 2008-04-10 | Survival Systems International, Inc. | Lifeboat disengagement system |
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