SU1300339A1 - Device for determining permeability of deformable films - Google Patents

Abstract

The invention relates to the field of devices for determining the permeability of film materials by gases, vapors, liquids and can be used to study the diffusion properties of various films under conditions of biaxial stretch strain. The aim of the invention is to improve accuracy by eliminating dead volume, by preventing fluid from leaking and by bringing operating conditions to natural ones. A film material is placed between the upper and lower flanges. A substance is introduced into the upper chamber of the flange through a fitting. The rod with a loading head, which is sealed by annular gaskets, deforms the film material. The magnitude of the deformation is determined by the scale of divisions. The substance penetrating through the material enters the working chamber of the lower flange and is transported by means of a carrier gas through the nozzles for analysis. 1 il. to (L with OO with

Description

f5

The invention relates to devices for determining the permeability of film materials for gases, vapors and liquids and can be used to study the diffusion properties of various films under conditions of biaxial stretch strain.

The purpose of the invention is to improve the measurement accuracy by eliminating dead volume, protecting the fluid from leakage and approaching the operating conditions to natural ones.

The drawing shows a diagram of the device.

The device consists of an upper 1 and lower 2 flanges with working chambers, a movable rod 3 with a loading head 4 and sealing o-rings 5, a cylindrical nut 6 for moving the rod 3. To the upper flange 1 two fittings 7 and 8 are attached, respectively substances and pressure gauge measurements. Two fittings 9 and O are diametrically opposed to the bottom flange 2 at an angle of 15-80 to the working section of the film material for the input and output of the carrier gas and removal of the substance penetrated through the film for analysis. A scale of I divisions is applied on the side surface of the lower flange, which allows the amount of material deformation to be determined by the movement of the rod and the cylindrical nut 6. Along with the translational provided and rotational; the movement of the rolling stock, which, in addition to determining the permeability of the films during deformation, allows permeability to be measured during deformation and shear.

The device works as follows

20

25

thirty

35

40

The cap 4, which is sealed by the annular gaskets 5 and moved by the nut 6, deforms the film to the material. The magnitude of the deformation is determined on a scale of 11 divisions. The substance that passes through the material and enters the working chamber of the lower flange 2 and the carrier gas through nozzles 9 and 1 O is transported for analysis.

Formula of the invention

Claims (3)

1.Device for determining the penetrability of deformable films, containing two flange elements mounted towards each other and equipped with fittings for supplying and discharging liquid and gas media, and in one of the flange elements a movable rod is installed, provided with a loading head made with holes, characterized in that, in order to improve the measurement accuracy by eliminating the dead volume, . and the gas outlet are installed at an angle of 5-80 with respect to the contact area of the flange el- ements, with the outlet of the inlet fitting and the inlet of the outlet fitting located above the base of the loading head and diametrically opposite. 2. The device according to claim 1, which is: in order to increase the measurement accuracy by preventing the fluid from leaking, annular gaskets are installed at a certain distance t from each other on the movable stem, which satisfies Condition 0, ), 5 D, where D is the diameter of the working area of the film. 3. The device according to p. 1, O T L and Between the upper 1 and lower 2 flanged by the fact that A film material is placed. A substance is supplied to the upper chamber of the flange 1 through the fitting 7, the pressure of which is controlled by a pressure gauge through the fitting 8. A rod 3 with a load The cap 4, which is sealed by the annular gaskets 5 and moved by the nut 6, deforms the film material. The magnitude of the deformation is determined on a scale of 11 divisions. The substance that has penetrated through the material enters the working chamber of the lower flange 2 and is transported by gas carrier through nozzles 9 and 1 O for analysis. Formula of the invention 1. A device for determining the permeability of deformable films, containing two flange elements mounted opposite to each other and equipped with fittings for supplying and discharging liquid and gas media, and in one of the flange elements there is a movable rod equipped with a loading head made with holes, characterized in that, in order to improve the measurement accuracy by eliminating the dead volume, the input fitting . and the gas outlet are installed at an angle of 5-80 with respect to the contact area of the flange elements, with the outlet of the inlet fitting and the inlet of the outlet fitting located above the base of the loading head and diametrically opposite. 2. The device according to claim 1, which is: in order to increase the measurement accuracy by preventing the fluid from leaking, annular gaskets are installed at a certain distance t from each other on the movable stem, which satisfies Condition 0, ), 5 D, where D is the diameter of the working area of the film. 3. The device according to claim 1, of which is, with the aim of 50 To increase accuracy by approximating operating conditions to full-scale ones, the vertical section of the loading head has the shape of a rectangle, or a triangle, or a semi-ellipse.