Device for detecting air permeability of polymeric membrane

Abstract

The utility model relates to the technical field of polymeric membrane air permeability detection, in particular to a polymeric membrane air permeability detection device which comprises a molecular membrane air permeability detector, a display screen and an operation panel, a display screen for data display and an operation panel for operation are mounted on the front side of the molecular film air permeability detector; a detection contact is further installed in the molecular film air permeability detector, a limiting frame fixedly connected with the molecular film air permeability detector is arranged at the bottom of the detection contact, and a clamp is arranged in the limiting frame; when the device is used, the groove is formed in the top of the inner frame, and the extrusion frame is matched with the groove of the inner frame to fix the molecular film, so that the friction with the molecular film can be increased, the movement of the molecular film can be effectively avoided, and the accuracy of subsequent detection data is ensured; meanwhile, the limiting frame and the extrusion frame are matched to ensure stable matching of the top cover and the bottom frame.

Description

Technical Field

[0001] This utility model relates to the field of polymer membrane permeability testing technology, specifically a polymer membrane permeability testing device. Background Technology

[0002] The air permeability of polymer membranes is generally tested using an air permeability tester, also known in the industry as an air permeability meter, differential pressure air permeability meter, air permeability measuring instrument, gas transmission rate tester, or gas transmission rate measuring instrument. Air permeability testing refers to the barrier effect of packaging materials on gases and other permeable substances. Air permeability testing is an important indicator for analyzing product shelf life from a packaging perspective. Air permeability testers are suitable for determining the gas transmission rate, solubility coefficient, diffusion coefficient, and permeability coefficient of plastic films, composite films, high-barrier materials, sheets, and metal foils at various temperatures.

[0003] Currently, when testing the air permeability of molecular membranes, the air permeability tester first clamps the molecular membrane with a fixture, then places it inside the instrument, and tests it by injecting air into the instrument. Existing fixtures generally consist of two covers, upper and lower, with an interlocking mechanism between them for fixation. When the test air pressure increases, the molecular membrane may be squeezed and moved, which may affect the test data. Therefore, to address the above problem, a new device for testing the air permeability of polymer membranes is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a polymer membrane permeability testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a polymer membrane permeability testing device, comprising a molecular membrane permeability tester, a display screen, and an operation panel;

[0006] The front of the molecular membrane permeability tester is equipped with a display screen for data display and an operation panel for operation.

[0007] The molecular membrane permeability tester is also equipped with a test contact inside, and a limiting frame that is fixedly connected to the molecular membrane permeability tester is provided at the bottom of the test contact. The limiting frame is equipped with a clamp inside.

[0008] The fixture includes a bottom frame, a top cover, and a limiting frame. The top cover is provided on the top of the bottom frame. The bottom of the top cover is fixedly connected to an extrusion frame and a limiting frame arranged in an inward and outward manner. An inner frame is also fixedly connected inside the bottom frame. A molecular membrane is provided between the extrusion frame and the inner frame.

[0009] Furthermore, both the limiting frame and the extrusion frame are arranged in a "U" shape.

[0010] Furthermore, the top of the inner frame is provided with a groove in the shape of an "U", and the lower part of the extrusion frame is located in the groove above the inner frame.

[0011] Furthermore, one side of the inner frame is connected to an exhaust pipe, and a valve is installed on the outside of the exhaust pipe.

[0012] Currently, when testing the permeability of molecular membranes, air permeability testers first clamp the membrane with a fixture, then place it inside the instrument, and test by injecting air into the instrument. Existing fixtures generally consist of two covers with an interlocking mechanism between them for fixation. When the test air pressure increases, the molecular membrane may be squeezed and moved, which may affect the test data. In contrast, this device, when powered on, has a groove on the top of the inner frame, and the squeezing frame engages with the groove of the inner frame to fix the molecular membrane. This design increases friction with the molecular membrane, effectively preventing the membrane from moving and ensuring the accuracy of subsequent test data. At the same time, the limiting frame and the squeezing frame work together to ensure a stable fit between the top cover and the bottom frame.

[0013] Furthermore, the limiting frame includes a protective frame, a rotating handle, and a threaded rod. The bottom of the protective frame is fixedly connected to the molecular membrane permeability tester. Threaded rods are spirally connected to both sides of the protective frame. A rotating handle is fixedly connected to one side of the threaded rod, and a limiting plate is rotatably connected to the other side of the threaded rod.

[0014] Furthermore, each of the limiting plates is fixedly connected to a guide plate at its bottom, and the outer side of the guide plate is slidably connected to the molecular membrane permeability tester.

[0015] Furthermore, there are two sets of limiting plates, and one side of the opposite end face of the limiting plates is inclined.

[0016] When performing air permeability testing on molecular membranes, rotating the handle drives the threaded rod to rotate, which in turn moves the limiting plate. This ensures that the fixture is stably placed inside the limiting frame. At the same time, the front side of the limiting plate is inclined to guide the fixture and ensure its stable placement.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In use, this utility model has a groove on the top of the inner frame, and the extrusion frame can fix the molecular membrane by cooperating with the groove of the inner frame. This setting can increase the friction with the molecular membrane, effectively prevent the molecular membrane from moving, and ensure the accuracy of subsequent test data. At the same time, the combination of the limiting frame and the extrusion frame can ensure the stable cooperation between the top cover and the bottom frame.

[0019] When the probe is inserted into the fixture, the air pressure on both sides of the molecular membrane is made to be consistent by activating the molecular membrane permeability tester. After standing for a period of time, the sealing performance of the fixture can be understood. When the sealing performance is good, the air permeability of the molecular membrane can be tested by opening the valve.

[0020] When performing air permeability testing on molecular membranes, rotating the handle drives the threaded rod to rotate, which in turn moves the limiting plate. This ensures that the fixture is stably placed inside the limiting frame. At the same time, the front side of the limiting plate is inclined to guide the fixture and ensure its stable placement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the limiting frame of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the guide plate of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the fixture of this utility model.

[0025] In the diagram: 1. Molecular membrane permeability tester; 2. Display screen; 3. Operation panel; 4. Test contact; 5. Limiting frame; 501. Protective frame; 502. Rotating handle; 503. Threaded rod; 504. Limiting plate; 505. Guide plate; 6. Fixture; 601. Base frame; 602. Top cover; 603. Limiting frame; 604. Extrusion frame; 605. Molecular membrane; 606. Inner frame; 607. Exhaust pipe; 608. Valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figure 1 and Figure 4 This utility model provides a technical solution:

[0028] A polymer membrane permeability testing device includes a molecular membrane permeability tester 1, a display screen 2, and an operation panel 3;

[0029] The aforementioned molecular membrane permeability tester 1 is equipped with a display screen 2 for displaying data and an operation panel 3 for operation on its front side;

[0030] The aforementioned molecular membrane permeability tester 1 is also equipped with a test contact 4 inside, and a limiting frame 5 fixedly connected to the molecular membrane permeability tester 1 is provided at the bottom of the test contact 4. A clamp 6 is provided inside the limiting frame 5.

[0031] The aforementioned fixture 6 includes a bottom frame 601, a top cover 602, and a limiting frame 603. The top cover 602 is disposed above the bottom frame 601. The bottom of the top cover 602 is fixedly connected to an inner and outer extrusion frame 604 and a limiting frame 603. An inner frame 606 is also fixedly connected inside the bottom frame 601. A molecular membrane 605 is disposed between the extrusion frame 604 and the inner frame 606.

[0032] Both the limiting frame 603 and the extrusion frame 604 are arranged in an "U" shape.

[0033] The top of the inner frame 606 is provided with a groove in the shape of an "U", and the extrusion frame 604 is located in the groove above the inner frame 606.

[0034] One side of the aforementioned inner frame 606 is also connected to an exhaust pipe 607, and a valve 608 is installed on the outside of the exhaust pipe 607.

[0035] Currently, when testing the air permeability of molecular membranes, air permeability testers first clamp the molecular membrane with a fixture, then place it inside the instrument, and test by injecting air into the instrument. Existing fixtures generally consist of two covers with an interlocking mechanism between them for fixation. When the test air pressure increases, the molecular membrane may be squeezed and moved, which may affect the test data. In contrast, this device, when powered on, has a groove on the top of the inner frame 606, and the extrusion frame 604 engages with the groove of the inner frame 606 to fix the molecular membrane 605. This design increases the friction with the molecular membrane 605, effectively preventing the molecular membrane 605 from moving and ensuring the accuracy of subsequent test data. At the same time, the limiting frame 603 and the extrusion frame 604 work together to ensure a stable fit between the top cover 602 and the bottom frame 601.

[0036] In this embodiment, when the detection contact 4 is inserted into the fixture 6, the molecular membrane permeability tester 1 is activated to make the air pressure on both sides of the molecular membrane 605 consistent. After standing for a period of time, the sealing performance of the fixture 6 can be understood. When the sealing performance is good, the air pressure remains unchanged. Then, the permeability of the molecular membrane 605 can be tested by opening the valve 608. The outer side of the limiting frame 603 is in close contact with the inner side of the bottom frame 601, which is used for limiting purposes.

[0037] Example 2: This example is an improvement upon Example 1. Please refer to [link / reference]. Figure 2 and Figure 3 Specifically, the aforementioned limiting frame 5 includes a protective frame 501, a rotating handle 502, and a threaded rod 503. The bottom of the protective frame 501 is fixedly connected to the molecular membrane permeability tester 1. The threaded rod 503 is spirally connected to both sides of the protective frame 501. The rotating handle 502 is fixedly connected to one side of the threaded rod 503, and the limiting plate 504 is rotatably connected to the other side of the threaded rod 503.

[0038] The bottom of each of the aforementioned limiting plates 504 is fixedly connected to a guide plate 505, and the outer side of the guide plate 505 is slidably connected to the molecular membrane permeability tester 1.

[0039] There are two sets of the aforementioned limiting plates 504, and one side of the opposite end face of the aforementioned limiting plates 504 is inclined.

[0040] When performing air permeability testing on the molecular membrane, rotating the handle 502 drives the threaded rod 503 to rotate, and the threaded rod 503 drives the limiting plate 504 to move. This ensures that the fixture 6 is stably placed inside the limiting frame 5. At the same time, the front side of the limiting plate 504 is set with an inclined surface, which serves to guide the fixture 6 and ensure its stable placement.

[0041] In this embodiment, a guide plate 505 is installed at the bottom of the limiting plate 504, which can ensure that the limiting plate 504 moves stably and can be used to limit the clamps 5 of different sizes, thus expanding the scope of use.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the air permeability of a polymer membrane, characterized in that: It includes a molecular membrane permeability tester (1), a display screen (2), and an operation panel (3); The front side of the molecular membrane permeability tester (1) is equipped with a display screen (2) for displaying data and an operation panel (3) for operation. The molecular membrane permeability tester (1) is also equipped with a test contact (4), and the bottom of the test contact (4) is provided with a limiting frame (5) that is fixedly connected to the molecular membrane permeability tester (1). The limiting frame (5) is provided with a clamp (6). The fixture (6) includes a bottom frame (601), a top cover (602), and a limiting frame (603). The top cover (602) is provided above the bottom frame (601). The bottom of the top cover (602) is fixedly connected to an extrusion frame (604) and a limiting frame (603) arranged in an inward and outward manner. An inner frame (606) is also fixedly connected inside the bottom frame (601). A molecular membrane (605) is provided between the extrusion frame (604) and the inner frame (606).

2. The polymer membrane permeability testing device according to claim 1, characterized in that: Both the limiting frame (603) and the squeezing frame (604) are arranged in an "U" shape.

3. The polymer membrane permeability testing device according to claim 1, characterized in that: The top of the inner frame (606) is provided with a groove in the shape of an "U", and the lower part of the extrusion frame (604) is located in the groove above the inner frame (606).

4. The polymer membrane permeability testing device according to claim 1, characterized in that: The inner frame (606) is also connected to an exhaust pipe (607) on one side, and a valve (608) is installed on the outside of the exhaust pipe (607).

5. The polymer membrane permeability testing device according to claim 1, characterized in that: The limiting frame (5) includes a protective frame (501), a rotating handle (502) and a threaded rod (503). The bottom of the protective frame (501) is fixedly connected to the molecular membrane permeability tester (1). The two sides of the protective frame (501) are spirally connected to the threaded rod (503). The rotating handle (502) is fixedly connected to one side of the threaded rod (503), and the limiting plate (504) is rotatably connected to the other side of the threaded rod (503).

6. The polymer membrane permeability testing device according to claim 5, characterized in that: The bottom of each limiting plate (504) is fixedly connected to a guide plate (505), and the outer side of the guide plate (505) is slidably connected to the molecular membrane permeability tester (1).

7. The polymer membrane permeability testing device according to claim 5, characterized in that: The number of the limiting plates (504) is two sets, and one side of the opposite end face of the limiting plates (504) is set with an inclined surface.

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