A solvent resistant test device

Abstract

The utility model relates to a kind of solvent-resistant testing devices, belong to coating layer solvent-resistant detection technical field.A kind of solvent-resistant testing device, including the solvent for containing test and the material to be detected and the stirrer of the solvent being stirred;Still including the fixed body of the guarantee that the material to be detected only contacts the solvent is set at the rim of the containing body, avoids the mechanical collision interference caused by stirrer drive, accurately excludes the coating layer peeling caused by non-solvent factor, significantly improves the accuracy and reliability of detection result.

Description

Technical Field

[0001] This utility model relates to a solvent resistance testing device, belonging to the technical field of solvent resistance testing for coatings. Background Technology

[0002] When preparing materials with coatings (such as films and sheets), the solvent resistance of the coating needs to be tested to prevent material failure due to contact with solvents. Currently, conventional testing methods are divided into two categories: wiping and immersion methods, but both have certain limitations.

[0003] The wiping method involves manually or automatically wiping the surface of the coating layer several times with a cotton ball soaked in chemical solvent, applying a certain pressure, and observing whether the substrate layer is exposed to assess solvent resistance. The operation of this method can be referenced in the solvent resistance testing device for coatings disclosed in announcement number CN216208902U and the GB / T 23989-2009 standard. However, for materials where wiping is not involved in subsequent use (such as release films used for ceramic slurry casting or adhesive coating, where the ceramic slurry and adhesive are in static contact on the film), if the coating layer peels off during the wiping method test, it is difficult to determine whether it is due to solvent action or wiping action; therefore, it has no substantial reference value for such materials.

[0004] The immersion method involves soaking the material in a chemical solvent, using a stirrer to ensure full contact between the solvent and the material, and assessing solvent resistance by testing the differences in the content of characteristic elements in the coating layer. For example, it can be used to evaluate changes in the silicon content of silicone oil release films. Relevant standards can be found in ISO 2812-1:2017. However, during the stirring process, the material may collide with the stirrer, the inner wall of the solvent container, or with each other, making it impossible to rule out coating peeling due to these collisions. This leads to significant differences in test results between different batches of material, resulting in low accuracy, stability, and reliability of solvent resistance test results. Utility Model Content

[0005] This invention aims to solve the above-mentioned problems by providing a solvent resistance testing device.

[0006] The technical solution of this utility model to solve the above problems is as follows:

[0007] A solvent resistance testing apparatus includes an immersion section for immersing a material to be tested in a test solvent, and a detection section for detecting the material to be tested; the immersion section includes a container for containing the solvent and the material to be tested, a stirrer for stirring the solvent, and a fixture disposed at the edge of the container to ensure that the material to be tested only comes into contact with the solvent.

[0008] This invention, by setting a fixing body, ensures that the material to be tested only comes into contact with the solvent, eliminating the coating peeling caused by non-solvent factors when the material to be tested is in full contact with the test solvent. It effectively solves the problems of multiple interference factors, poor adaptability to the scene, and low reliability of results in existing detection methods, and significantly improves the accuracy, adaptability and automation level of solvent resistance testing, and has important engineering application value.

[0009] As a preferred embodiment of the above technical solution, the fixing body includes a fixing bracket and a clamp set based on the fixing bracket.

[0010] As a preferred embodiment of the above technical solution, the clamp is suspended from the fixed bracket by a rope, cable tie, or metal wire.

[0011] As a preferred embodiment of the above technical solution, the fixed bracket is mounted at the edge.

[0012] As a preferred embodiment of the above technical solution, the fixed bracket is formed by fixing a number of staggered horizontal and vertical rods.

[0013] As a preferred embodiment of the above technical solution, multiple clamps are fixed at intervals on any of the transverse or longitudinal bars to avoid collisions between materials when multiple materials to be tested are immersed simultaneously.

[0014] As a preferred embodiment of the above technical solution, the stirrer is a magnetic stirrer, with the stirring magnet positioned at the bottom of the container to avoid direct contact and collision between the stirring magnet and the material to be tested.

[0015] As a preferred embodiment of the above technical solution, the stirrer is a paddle stirrer, which is positioned close to the bottom of the container with the blades facing the edge of the container to avoid direct contact and collision between the blades and the material to be tested.

[0016] As a preferred embodiment of the above technical solution, the accommodating body is a transparent and corrosion-resistant container.

[0017] The container can be any transparent and corrosion-resistant container, such as transparent glass or plastic containers, which facilitates direct observation of the coating condition, enables visual monitoring of the testing process, and prevents solvent corrosion of the container.

[0018] As a preferred embodiment of the above technical solution, the accommodating body is provided with multiple accommodating spaces.

[0019] The device contains multiple independent compartments, which support simultaneous testing of the tolerance of different materials or the same material in different solvents, improving testing efficiency and reducing batch variability.

[0020] As a preferred embodiment of the above technical solution, the fixed bracket is fixed to the edge of the accommodating body by a lifting frame.

[0021] As a preferred embodiment of the above technical solution, the lifting frame is a stroke cylinder.

[0022] The fixed bracket is fixed to the edge of the container by a stroke cylinder, which can dynamically adjust the relative position of the material and the solvent to simulate the dynamic process of the material gradually immersing into the solvent, and adapt to the testing needs of different materials.

[0023] As a preferred embodiment of the above technical solution, the detection unit is a silicon coating measuring instrument, which evaluates solvent resistance by measuring the change in silicon content of the coating layer before and after the material comes into full contact with a chemical solvent.

[0024] The testing department integrates quantitative tools such as silicon coating measuring instruments to directly assess solvent resistance by measuring changes in the content of characteristic elements in the coating layer. This avoids subjective errors caused by visual observation and improves the objectivity and accuracy of the test data.

[0025] The overall design of the device takes into account both static contact and dynamic simulation requirements, and the test conditions can be precisely controlled, providing a more realistic solvent resistance assessment for materials such as release films that are in static contact with solvents.

[0026] In summary, this utility model has the following beneficial effects:

[0027] This invention features a fixed body that ensures the material to be tested only comes into contact with the solvent, avoiding mechanical collision interference caused by the stirrer drive, accurately eliminating coating peeling caused by non-solvent factors, and significantly improving the accuracy and reliability of the test results. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0029] Figure 2 This is a top view of the fixed bracket in Embodiment 1;

[0030] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0031] In the diagram, the component names represented by each label are as follows:

[0032] 1-Container, 2-Agitator, 3-Fixed body, 31-Fixed bracket, 32-Clamp, 4-Lifting frame. Detailed Implementation

[0033] The present invention will be further explained below with reference to the accompanying drawings.

[0034] This specific embodiment is merely an explanation of the present invention and is not intended to limit it. Any changes made by those skilled in the art after reading this specification, as long as they fall within the scope of the claims, will be protected by patent law. Example 1

[0035] A solvent resistance testing apparatus includes an immersion section for immersing a material to be tested in a test solvent, and a detection section for detecting the material to be tested.

[0036] The testing department is used to quantitatively evaluate the peeling of coatings under the action of solvents. It directly assesses solvent resistance by measuring changes in the content of characteristic elements in the coating (such as changes in silicon content), avoiding subjective errors caused by visual observation and improving the objectivity and accuracy of the test results.

[0037] The immersion section includes a container for holding the solvent and the material to be tested, a stirrer for stirring the solvent, and a fixture disposed at the edge of the container to ensure that the material to be tested only comes into contact with the solvent.

[0038] like Figures 1-2 As shown, the soaking section mainly consists of three core components:

[0039] Container 1: Used to hold the chemical solvents used for testing and the coating material to be tested (such as release film, seals, films, etc.).

[0040] Stirrer 2: Used to stir the solvent in the container to ensure that the solvent and the material to be tested are in full contact, simulating the dynamic interaction environment between the material and the solvent in actual use;

[0041] Fixing body 3: Based on the container setting, it is used to fix the material to be tested, ensuring that it remains stable during the test and only comes into contact with the solvent.

[0042] The specific structure and connection relationship of each component are as follows:

[0043] The container 1 is the core container for testing. In this embodiment, it is made of transparent glass so that the coating state of the material to be tested can be directly observed (such as whether discoloration, bubbling, peeling, etc. occur), thus realizing the visual monitoring of the testing process.

[0044] The container can be cylindrical, cuboid, or other conventional container shapes. Its interior can be divided into multiple independent storage spaces as needed. Each space can hold a single material to be tested, thereby supporting batch testing, reducing batch variations, and improving testing efficiency.

[0045] Stirrer 2 is used to drive the solvent flow and ensure sufficient contact between the solvent and the material to be tested. In this embodiment, a magnetic stirrer is preferred; a stirring magnet (typically a small magnetic rotor) is placed at the bottom of the container 1, and an external magnetic stirring base drives the magnet to rotate, thereby driving the solvent flow. This method avoids direct contact between the stirrer and the material to be tested, eliminating the risk of coating peeling due to stirring collisions, and is particularly suitable for testing materials sensitive to mechanical interference.

[0046] Fixative 3, the core function of which is to stably fix the material to be tested in the solvent within the container, while preventing it from colliding with the stirrer or other components. Its structure includes:

[0047] Fixed bracket 31: It is erected at the edge of the accommodating body 1 and is fixed by several interlaced horizontal and vertical rods to form a grid-like or frame-like structure, providing an installation base for the clamp;

[0048] Fixture 32: Based on a fixed support, it is used to clamp or fix the material to be tested (such as the edge of a release film, the interlayer of a film, etc.); the fixture is suspended from the fixed support by a rope, cable tie, or wire, and cable ties are used in this embodiment; so that the material to be tested is suspended in the solvent;

[0049] To improve the objectivity of test results, this device is equipped with a testing section for quantitatively evaluating the peeling of coatings. A preferred option is a silicon coating measuring instrument (for silicon-containing coating materials such as silicone oil release films), which measures the change in silicon content before and after the material comes into full contact with the solvent to determine the solvent resistance of the coating.

[0050] Taking silicone oil release film as an example, the working process of this device is as follows:

[0051] Pre-test determination: Cut the release film into samples with a diameter of 20 mm, and use a silicon coating measuring instrument to measure the initial silicon content of the coating layer of the release film sample;

[0052] Sample preparation: Add solvent (such as ethanol) to the container, fix the release film sample to the fixed bracket with the clamp, and immerse the unclamped part of the release film in the solvent;

[0053] Stirring contact: Start the magnetic stirrer, the magnetic stir bar rotates and causes the solvent to flow gently;

[0054] Process monitoring: Observe whether the coating layer peels off or changes color through a transparent container;

[0055] Results evaluation: The release film sample was removed, and the silicon content of the release film sample after immersion was measured using a silicon coating measuring instrument. The solvent resistance was evaluated by the difference between the initial silicon content and the silicon content after immersion.

[0056] The advantages of this device are reflected in the following aspects:

[0057] Precisely eliminate non-solvent interference: The combination design of fixed bracket and suspension clamp allows the material to come into contact with the solvent, avoiding mechanical pressure interference in the wiping method and collision detachment problems in the immersion method, and accurately determining whether the coating detachment is caused by the solvent.

[0058] Visualization and multi-scenario adaptation: The transparent container supports real-time observation, and multiple independent container spaces support batch testing of different material or solvent combinations;

[0059] The test results are objective and accurate: The integrated silicon coating measuring instrument and other quantitative tools directly assess solvent resistance through changes in element content, avoiding subjective errors from visual observation.

[0060] Engineering applications: Particularly suitable for testing materials such as release films, providing a more realistic evaluation scheme for their solvent resistance. Example 2

[0061] A solvent resistance testing device, such as Figure 3 As shown, the only difference from Example 1 is:

[0062] The fixed bracket 31 can be fixed to the edge of the receiving body via the lifting frame 4. The lifting frame is preferably a stroke cylinder, and the height of the fixed bracket can be dynamically adjusted by adjusting the stroke of the cylinder, thereby controlling the depth of the material to be tested immersed in the solvent (such as simulating the process of the material gradually immersing in the solvent), and adapting to the testing needs of different materials.

Claims

1. A solvent resistance testing apparatus, comprising an immersion section for immersing a material to be tested in a test solvent, and a detection section for detecting the material to be tested, characterized in that: The immersion section includes a container (1) for containing the solvent and the material to be tested, a stirrer (2) for stirring the solvent, and a fixture (3) disposed at the edge of the container (1) to ensure that the material to be tested only contacts the solvent.

2. The solvent resistance testing device according to claim 1, characterized in that: The fixing body (3) includes a fixing bracket (31) and a clamp (32) based on the fixing bracket.

3. The solvent resistance testing device according to claim 2, characterized in that: The clamp (32) is suspended from the fixed bracket (31) by a rope, cable tie or wire.

4. The solvent resistance testing device according to claim 2, characterized in that: The fixed bracket (31) is installed at the edge.

5. The solvent resistance testing device according to claim 2, characterized in that: The fixed bracket (31) is fixed by a number of staggered horizontal and vertical bars.

6. The solvent resistance testing device according to claim 5, characterized in that: Multiple clamps (32) are fixed at intervals on any of the transverse or longitudinal bars.

7. The solvent resistance testing device according to claim 1, characterized in that: The stirrer is a magnetic stirrer, and the stirring magnet is located at the bottom of the container (1).

8. The solvent resistance testing device according to claim 1, characterized in that: The agitator is a paddle agitator, which is positioned close to the bottom of the container with the blades facing the edge of the container.

9. The solvent resistance testing device according to claim 1, characterized in that: The container (1) is a transparent and corrosion-resistant container.

10. A solvent resistance testing device according to claim 1 or 9, characterized in that: The accommodating body (1) has multiple accommodating spaces.

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