Teflon breathable film moisture permeability testing equipment and testing method thereof

Abstract

The invention discloses equipment for testing the moisture permeability of a polytetrafluoroethylene breathable film, and the equipment comprises a box body which is provided with a cover plate which can be movably opened; the detection partition plate is arranged in the middle section of the box body, a detection through opening is formed in the center of the detection partition plate and used for installing a polytetrafluoroethylene breathable film to be detected, and the detection partition plate divides the box body into a lower heating cavity and an upper detection cavity; the heating device, the temperature sensor and the water circulation system are mounted in the lower heating cavity; and the humidity sensor is arranged on the upper detection cavity. The detection partition plate is arranged in the middle of the box body, meanwhile, the hole is formed for mounting the polytetrafluoroethylene breathable film to be detected, the whole box body is divided into the lower heating cavity and the upper detection cavity, the lower heating cavity heats detection liquid to generate water vapor, the upper detection cavity performs detection through the humidity sensor, the function of detecting the water vapor permeation amount of the breathable film is achieved, cost is low, and detection efficiency is high. Detection is convenient and efficient.

Description

Technical Field

[0001] The invention belongs to the technical field of breathable membrane water vapor testing, and in particular relates to a polytetrafluoroethylene breathable membrane water vapor permeability testing device and a testing method thereof. Background Art

[0002] At present, breathable waterproof caps have been widely used in automotive lamps. The waterproof and breathable performance of breathable waterproof caps directly affects the performance of automotive lamps. The waterproof and breathable membranes of waterproof breathable caps are all polytetrafluoroethylene membranes. With the increasing requirements for the performance and service life of automotive lamps, the testing of polytetrafluoroethylene membranes has also had relevant strict requirements at this stage. However, the general water vapor testing equipment has a complex structure, high requirements for workers to operate, and low operating test efficiency, which is not suitable for current workshop production testing.

[0003] Therefore, a polytetrafluoroethylene breathable membrane water vapor permeability testing device and a testing method thereof with low cost, convenient operation, accurate detection and high efficiency are in urgent need of research. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a polytetrafluoroethylene breathable membrane water vapor permeability testing device and a testing method thereof, so as to avoid the difficulties in conventional breathable membrane water vapor testing, high equipment costs, and cumbersome testing.

[0005] In order to solve the above technical problems, the present invention discloses a polytetrafluoroethylene breathable membrane water vapor permeability testing device, comprising: A box body, wherein the box body has a cover plate that can be opened movably; A detection partition is arranged in the middle section of the box body, and the center of the detection partition has a detection opening, the detection opening is used to install the polytetrafluoroethylene breathable membrane to be detected, and the detection partition divides the box body into a lower heating chamber and an upper detection chamber; A heating device, a temperature sensor, and a water circulation system installed in the lower heating chamber; A humidity sensor is arranged in the upper detection cavity.

[0006] According to one embodiment of the present invention, the heating device is configured as an electric heating tube, and a controller is provided on the outer wall of the box body, and the controller is used to control the power on or off of the electric heating tube.

[0007] According to one embodiment of the present invention, the water circulation system is configured as a fan driven by a motor.

[0008] According to an embodiment of the present invention, the lower edge of the cover plate abuts against the box body through a sealing ring, and locking buckles are provided on two opposite sides for locking the box body.

[0009] The present invention also discloses a method for testing a polytetrafluoroethylene breathable membrane water vapor permeability testing device, comprising: Step a. The test liquid is stored in the lower heating chamber, and then the polytetrafluoroethylene breathable membrane product to be tested is attached to the test port, and the cover plate is covered and sealed by a lock; Step b. Use the heating device to power on the test liquid, the water circulation system works to ensure that the temperature of the test liquid is uniform, the temperature sensor monitors the liquid temperature, and transmits the signal to the controller through the signal line. The controller controls the power on or off linkage of the heating device to ensure that the temperature of the test liquid is within the required range; Step c. When the lower layer heats the detection liquid to generate water vapor, the water vapor passes through the polytetrafluoroethylene breathable membrane to reach the upper detection cavity. The humidity sensor in the upper detection cavity monitors the humidity change in real time to detect the water vapor permeability of the breathable membrane.

[0010] The present invention also discloses a method for testing a polytetrafluoroethylene breathable membrane water vapor permeability testing device, comprising: Step a. Store the test liquid in the lower heating chamber, and then attach the polytetrafluoroethylene breathable membrane product to be tested to the test port, without covering the cover plate; Step b. weigh and record the test device filled with the test liquid and affixed with a polytetrafluoroethylene breathable membrane; Step c. Use the heating device to power on the test liquid, the water circulation system works to ensure that the temperature of the test liquid is uniform, the temperature sensor monitors the liquid temperature, and transmits the signal to the controller through the signal line. The controller controls the power on or off linkage of the heating device to ensure that the temperature of the test liquid is within the required range; Step d. When the lower layer is heated to generate water vapor, the water vapor passes through the polytetrafluoroethylene breathable membrane to reach the upper detection chamber and is emitted into the air; Step e. After the test is completed, the test device is weighed and recorded, and the values ​​recorded before and after the test are calculated to obtain the water vapor permeability of the breathable membrane.

[0011] Compared with the prior art, the present invention can achieve the following technical effects: By setting a detection partition in the middle of the box and opening a hole to install the polytetrafluoroethylene breathable membrane to be tested, the entire box is divided into a lower heating chamber and an upper detection chamber. The lower heating chamber heats the detection liquid to generate water vapor, and the upper detection chamber detects through a humidity sensor to achieve the function of detecting the water vapor permeability of the breathable membrane. The cost is low and the detection is convenient and efficient.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of a water vapor permeability testing device for a polytetrafluoroethylene breathable membrane according to an embodiment of the present invention. Figure ID

[0014] Box body 10, lower heating chamber 11, upper detection chamber 12, cover plate 20, sealing ring 21, detection partition 30, polytetrafluoroethylene breathable membrane 40, heating device 50, temperature sensor 60, water circulation system 70, humidity sensor 80, controller 90. DETAILED DESCRIPTION

[0015] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0016] Please refer to Figure 1 , Figure 1 It is a schematic diagram of a water vapor permeability testing device for a polytetrafluoroethylene breathable membrane according to an embodiment of the present invention.

[0017] As shown in the figure, a polytetrafluoroethylene breathable membrane water vapor permeability testing device includes: a box body 10, the box body 10 has a cover plate 20 that can be movably opened; a detection partition 30 arranged in the middle section of the box body 10, the detection partition 30 has a detection opening in the center, the detection opening is used to install the polytetrafluoroethylene breathable membrane 40 to be tested, and the detection partition 30 divides the box body 10 into a lower heating chamber 11 and an upper detection chamber 12; a heating device 50, a temperature sensor 60, and a water circulation system 70 installed in the lower heating chamber 12; a humidity sensor 60 arranged in the upper detection chamber 12.

[0018] In one embodiment of the present invention, the middle section of the box 10 is partitioned by a detection partition 30, and its inner cavity is divided into a lower heating chamber 11 and an upper detection chamber 12, and a cover plate 20 is installed at the upper end. The detection partition 30 has a central opening for installing a polytetrafluoroethylene breathable membrane 40 with detection. A heating device 50 is installed at the bottom of the lower heating chamber 12 to store the detection liquid, and water is preferably used in the present invention. The temperature sensor 60 detects the real-time temperature, and the water circulation system 70 ensures that the water temperature is uniform, and finally generates steam to pass through the polytetrafluoroethylene breathable membrane 40 for testing.

[0019] The upper detection chamber 12 is provided with a humidity sensor 60 to detect the real-time humidity.

[0020] In a preferred embodiment, the heating device 50 is configured as an electric heating tube, and a controller 90 is disposed on the outer wall of the box body 10. The controller 90 is used to control the power on or off of the electric heating tube to ensure that the temperature of the detected liquid is within the required range.

[0021] The water circulation system 70 is configured as a motor-driven fan, which stirs the water to make the water temperature more uniform and the detection more accurate.

[0022] The lower edge of the cover plate 20 of the present invention contacts the box body 10 through the sealing ring 21 to ensure the sealing performance, and locking buckles are arranged on two opposite sides for locking the box body 10, which makes the installation more convenient. Example 1.

[0023] A testing method for a polytetrafluoroethylene breathable membrane water vapor permeability testing device, comprising: Step a. The test liquid is stored in the lower heating chamber, and then the polytetrafluoroethylene breathable membrane product to be tested is attached to the test port, and the cover plate is covered and sealed by a lock; Step b. Use the heating device to power on the test liquid, the water circulation system works to ensure that the temperature of the test liquid is uniform, the temperature sensor monitors the liquid temperature, and transmits the signal to the controller through the signal line. The controller controls the power on or off linkage of the heating device to ensure that the temperature of the test liquid is within the required range; Step c. When the lower layer heats the detection liquid to generate water vapor, the water vapor passes through the polytetrafluoroethylene breathable membrane to reach the upper detection cavity. The humidity sensor in the upper detection cavity monitors the humidity change in real time to detect the water vapor permeability of the breathable membrane. Example 2.

[0024] A testing method for a polytetrafluoroethylene breathable membrane water vapor permeability testing device, comprising: Step a. Store the test liquid in the lower heating chamber, and then attach the polytetrafluoroethylene breathable membrane product to be tested to the test port, without covering the cover plate; Step b. weigh and record the test device filled with the test liquid and affixed with a polytetrafluoroethylene breathable membrane; Step c. Use the heating device to power on the test liquid, the water circulation system works to ensure that the temperature of the test liquid is uniform, the temperature sensor monitors the liquid temperature, and transmits the signal to the controller through the signal line. The controller controls the power on or off linkage of the heating device to ensure that the temperature of the test liquid is within the required range; Step d. When the lower layer is heated to generate water vapor, the water vapor passes through the polytetrafluoroethylene breathable membrane to reach the upper detection chamber and is emitted into the air; Step e. After the test is completed, the test device is weighed and recorded, and the values ​​recorded before and after the test are calculated to obtain the water vapor permeability of the breathable membrane.

[0025] In summary, the present invention arranges a detection partition in the middle of the box body and opens a hole to install the polytetrafluoroethylene breathable membrane to be detected, so as to divide the entire box body into a lower heating chamber and an upper detection chamber. The lower heating chamber heats the detection liquid to generate water vapor, and the upper detection chamber detects through a humidity sensor to achieve the function of detecting the water vapor permeability of the breathable membrane. The cost is low and the detection is convenient and efficient.

[0026] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A polytetrafluoroethylene breathable membrane water vapor permeability test device, characterized in that: include: A box body, wherein the box body has a cover plate that can be opened movably; A detection partition is arranged in the middle section of the box body, the center of the detection partition has a detection opening, the detection opening is used to install the polytetrafluoroethylene breathable membrane to be detected, and the detection partition divides the box body into a lower heating chamber and an upper detection chamber; A heating device, a temperature sensor, and a water circulation system installed in the lower heating chamber; A humidity sensor is arranged in the upper detection cavity.

2. The polytetrafluoroethylene breathable membrane water vapor permeability testing device according to claim 1, characterized in that: The heating device is configured as an electric heating tube, and a controller is disposed on the outer wall of the box body, and the controller is used to control the power on or off of the electric heating tube.

3. The polytetrafluoroethylene breathable membrane water vapor permeability testing device according to claim 1, characterized in that: The water circulation system is configured as a fan driven by a motor.

4. The polytetrafluoroethylene breathable membrane water vapor permeability testing device according to claim 1, characterized in that: The lower edge of the cover plate contacts the box body through a sealing ring, and locking buckles are arranged on two opposite sides for locking the box body.

5. A testing method for the water vapor permeability testing device of polytetrafluoroethylene breathable membrane as claimed in claim 1, characterized in that: include: Step a. The test liquid is stored in the lower heating chamber, and then the polytetrafluoroethylene breathable membrane product to be tested is attached to the test port, and the cover plate is covered and sealed by a lock; Step b. Use the heating device to power on the test liquid, the water circulation system works to ensure that the temperature of the test liquid is uniform, the temperature sensor monitors the liquid temperature, and transmits the signal to the controller through the signal line. The controller controls the power on or off linkage of the heating device to ensure that the temperature of the test liquid is within the required range; Step c. When the lower layer heats the detection liquid to generate water vapor, the water vapor passes through the polytetrafluoroethylene breathable membrane to reach the upper detection cavity. The humidity sensor in the upper detection cavity monitors the humidity change in real time to detect the water vapor permeability of the breathable membrane.

6. A testing method for the water vapor permeability testing device of polytetrafluoroethylene breathable membrane as claimed in claim 1, characterized in that: include: Step a. Store the test liquid in the lower heating chamber, and then attach the polytetrafluoroethylene breathable membrane product to be tested to the test port, without covering the cover plate; Step b. weigh and record the test device filled with the test liquid and affixed with a polytetrafluoroethylene breathable membrane; Step c. Use the heating device to power on the test liquid, the water circulation system works to ensure that the temperature of the test liquid is uniform, the temperature sensor monitors the liquid temperature, and transmits the signal to the controller through the signal line. The controller controls the power on or off linkage of the heating device to ensure that the temperature of the test liquid is within the required range; Step d. When the lower layer is heated to generate water vapor, the water vapor passes through the polytetrafluoroethylene breathable membrane to reach the upper detection chamber and is emitted into the air; Step e. After the test is completed, the test device is weighed and recorded, and the values ​​recorded before and after the test are calculated to obtain the water vapor permeability of the breathable membrane.

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