Test method for detecting exhaust property of protective film

Abstract

The invention discloses a test method for detecting exhaust performance of a protective film, and relates to the technical field of rubber product detection. The test method comprises the following steps: S1, sample sheet processing; s2, treating a pasted object; s3, exhaust performance testing: stripping the bottom paper of the protective film, enabling the adhesive surface of the protective film to face the pasted object, pasting the bottom of the protective film on the pasted object after the adhesive surface of the protective film and the pasted object form a 45-degree angle, and discharging bubbles of the protective film; s4, measuring exhaust property data: attaching the rest part of the protective film to the attached object, timing by using a stopwatch, stopping timing until all bubbles are discharged, and recording the time to obtain test data; and S5, recording a measurement result. The test method for detecting the exhaust property of the protective film provided by the invention has the advantages of simplicity and convenience in test, quantifiable data, low cost and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber product detection, and particularly relates to a test method for detecting the air exhaust performance of a protective film. Background Art

[0002] In modern industrial production and daily life, protective films are widely used for protecting various items such as electronic screens, hardware furniture, and building paint surfaces. The functions of the protective film not only include preventing the surface of the item from being scratched and worn, but also resisting the erosion of dust, stains, etc. However, if the air exhaust performance of the protective film is poor after being adhered to the adherend, air bubbles will be left between the film and the adherend, seriously affecting the appearance and use effect. For an electronic screen, the air bubbles will interfere with the visual experience and reduce the visual clarity; for hardware furniture, poor air exhaust will cause air and water vapor to enter the metal surface, accelerating the rusting and aging of the metal. In the field of detection of pressure-sensitive adhesive products such as protective films and tapes, there are many deficiencies in the existing air exhaust performance test methods. Some methods are highly subjective and lack quantitative standards, making it difficult to accurately evaluate the air exhaust performance of the protective film and unable to meet the increasing requirements for the quality control of protective films. Therefore, it is of great practical significance to develop a scientific and accurate test method for the air exhaust performance of the protective film. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a test method for detecting the air exhaust performance of a protective film.

[0004] Specifically, the following technical solutions are included:

[0005] A test method for detecting the air exhaust performance of a protective film is provided, including the following steps:

[0006] S1. Sample sheet processing: After the sample sheet to be tested is aged, the sample sheet to be tested is placed in the bonding environment for more than 4 hours, and the sample sheet to be tested is cut to obtain a protective film;

[0007] S2. Adherend processing: The adherend is cleaned with a solvent to ensure that the surface of the adherend has no dust, color streaks, and residual glue. The cleaned adherend is placed in the bonding environment for 2 - 4 minutes, and after the solvent volatilizes, the processing of the adherend is completed;

[0008] S3. Air exhaust performance test: Peel off the base paper of the protective film, face the adhesive surface of the protective film towards the adherend, and after forming a 45° angle with the adherend, paste the bottom of the protective film on the adherend to remove the air bubbles in the protective film;

[0009] S4. Measurement of air exhaust performance data: Let the remaining part of the protective film adhere to the adherend, and at the same time, time with a stopwatch. Stop timing until all the air bubbles are removed, and record the time to obtain the test data;

[0010] S5. Measurement result recording: Repeat steps S1 - S4 three times, and take the average of the test data as the test result of the air exhaust property of the protective film.

[0011] Further, in steps S1 and S2, the temperature of the laminating environment is 24 ± 4°C, and the relative humidity is 50 - 75%.

[0012] Further, in step S1, the cut size is 100 - 150mm * 100 - 150mm.

[0013] Preferably, in step S1, the aging method and time of the sample to be tested are in accordance with the QC card (QC: Quality Control) standard regulations corresponding to the part number.

[0014] Further, in step S2, the solvent is one of ethyl acetate, anhydrous alcohol, and isopropyl alcohol.

[0015] Preferably, in step S2, if the object to be pasted is not used within 2 hours after cleaning, it needs to be cleaned again.

[0016] Further, in step S2, the object to be pasted is one of a glass plate, a metal plate, and a mobile phone touch screen.

[0017] Further, in step S2, cleaning with the solvent means using a lint-free cloth or lint-free paper to dip the corresponding solvent for cleaning.

[0018] Preferably, the protective film includes a base plate and an adhesive surface arranged in sequence.

[0019] Further, the thickness of the protective film is 59 - 109μm.

[0020] Further, the component of the adhesive surface of the protective film is one of silica gel, PU glue (PU: polyurethane), and acrylic glue.

[0021] Further, the component of the base paper of the protective film is one of PET (polyethylene terephthalate), PI (polyimide), and CPP (chlorinated polypropylene resin).

[0022] Further, in step S3, the bottom length of the protective film pasted on the object to be pasted is 10 - 15mm.

[0023] Preferably, in step S4, the unit of the test data is s / 100cm 2 。

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention provides a test method for detecting the air exhaust property of a protective film, which has the advantages of simple testing, quantifiable data, low cost, and high efficiency. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a flowchart of the test method for detecting the air exhaust property of the protective film in Embodiment 1 of the present invention;

[0028] Figure 2 It is a schematic diagram of the fitting of the protective film and the object to be pasted in the test method for detecting the air exhaust property of the protective film in Embodiment 1 of the present invention;

[0029] Explanation of the labels in the figure:

[0030] 1 - Protective film; 2 - Object to be pasted. Detailed Embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0033] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0034] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0035] In order to more fully understand the technical content of the present invention, the following further introduces and illustrates the technical solutions of the present invention in combination with specific embodiments.

[0036] Embodiment 1

[0037] A test method for detecting the air exhaust property of a protective film, comprising the following steps:

[0038] S1. Sample sheet treatment: After the sample sheet to be tested is fully cured, place the sample sheet to be tested in a laminating environment with a temperature of 24°C and a relative humidity of 65% for 5 hours, cut the sample sheet to be tested, and the cutting specification is 100mm * 100mm to obtain the protective film;

[0039] S2. Object to be pasted treatment: Use a lint-free cloth to dip the corresponding solvent to clean the object to be pasted 2, ensure that the surface of the object to be pasted 2 is free of dust, color streaks and residual glue, place the cleaned object to be pasted 2 in a laminating environment with a temperature of 24°C and a relative humidity of 60% for 2 minutes, and complete the treatment of the object to be pasted 2 after the solvent volatilizes; the solvent is ethyl acetate, and the object to be pasted 2 is a steel plate;

[0040] S3. Air exhaust property test: Peel off the backing paper of the protective film 1, face the adhesive surface of the protective film 1 towards the object to be pasted 2, after forming a 45° angle with the object to be pasted 2, paste the bottom of the protective film 1 on the object to be pasted 2, and the length of the bottom of the protective film 1 pasted on the object to be pasted 2 is 10mm, and remove the bubbles in the protective film 1; the protective film 1 includes a bottom plate and an adhesive surface arranged in sequence, the thickness of the protective film 1 is 60μm, the component of the adhesive surface of the protective film 1 is silica gel, and the component of the backing paper of the protective film 1 is PET;

[0041] S4. Measurement of air exhaust property data: Let the remaining part of the protective film 1 adhere to the object to be pasted 2, and at the same time time with a stopwatch, stop timing until all the bubbles are removed, and record the time to obtain the test data;

[0042] S5. Recording of measurement results: Repeat steps S1 - S4 three times, and take the average value of the test data as the air exhaust property test result of the protective film 1.

[0043] Example 2

[0044] The difference between Example 2 and Example 1 is that the component of the adhesive surface of the protective film 1 in Example 2 is PU glue, and the other conditions are the same.

[0045] Example 3

[0046] The difference between Example 3 and Example 1 is that the component of the adhesive surface of the protective film 1 in Example 3 is acrylic glue, and the other conditions are the same.

[0047] Example 4

[0048] The difference between Example 4 and Example 1 is that the thickness of the protective film 1 in Example 4 is 59μm, and the other conditions are the same.

[0049] Example 5

[0050] Example 5 is different from Example 1 in that the thickness of the protective film 1 in Example 5 is 84 μm, and the other conditions are the same.

[0051] Example 6

[0052] Example 6 is different from Example 1 in that the thickness of the protective film 1 in Example 6 is 109 μm, and the other conditions are the same.

[0053] Performance test

[0054] Using the test method for detecting the air exhaust performance of the protective film of the present invention as the experimental group and the traditional detection method (visual method) as the control group, the test data of the air exhaust performance of the protective film are respectively tested.

[0055] Performance tests were carried out on the test method for detecting the air exhaust performance of the protective film in Examples 1-3 and the traditional detection methods in Comparative Examples 1-3. The test results are shown in Table 1 below:

[0056] Table 1 Performance test results of Examples 1-3 and Comparative Examples 1-3

[0057]

[0058] Performance tests were carried out on the test method for detecting the air exhaust performance of the protective film in Examples 4-6 and the traditional detection methods in Comparative Examples 4-6. The test results are shown in Table 2 below:

[0059] Table 2 Performance test results of Examples 4-6 and Comparative Examples 4-6

[0060]

[0061]

[0062] It can be seen from the test results in Tables 1-2 that the test methods for detecting the air exhaust performance of the protective film in the examples of the present invention are all faster than the traditional detection methods in terms of detection speed. Thus, the present invention provides a test method for detecting the air exhaust performance of the protective film, which can quantify data while being simple and efficient in testing.

[0063] In summary, the present invention provides a test method for detecting the air exhaust performance of the protective film, which has the following beneficial effects:

[0064] (1) Higher accuracy: It can more accurately quantify the air exhaust performance of the protective film, reduce the influence of human error and subjective judgment, and provide more accurate data support for the quality control of the protective film.

[0065] (2) Higher efficiency: The tools used are simple, the method is easy, and rapid detection can be achieved, greatly improving the detection efficiency, saving time and cost, and being able to meet the rapid detection requirements on large-scale production lines.

[0066] (3) Wider scope of application: It is universal for different types of protective films, which helps to promote the technological development and quality improvement of the entire protective film industry. As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A test method for detecting the exhaust performance of a protective film, characterized in that: The following steps are involved: S1. Sample processing: After the sample to be tested is matured, place the sample to be tested in a bonding environment for more than 4 hours, cut the sample to be tested, and obtain a protective film; S2. Treatment of the object to be pasted: Use solvent to clean the object to be pasted, ensure that there is no dust, color lines and residual glue on the surface of the object to be pasted, place the cleaned object to be pasted in the bonding environment for 2-4 minutes, and complete the treatment of the object to be pasted after the solvent evaporates; S3. Exhaust test: Peel off the backing paper of the protective film, place the adhesive surface of the protective film toward the object to be adhered, at a 45° angle to the object to be adhered, and stick the bottom of the protective film on the object to be adhered to remove the bubbles in the protective film; S4. Exhaust data measurement: let the rest of the protective film fit on the object to be adhered, and use a stopwatch to time until all the bubbles are exhausted, stop timing, and record the time to obtain the test data; S5. Recording of measurement results: Repeat steps S1-S4 three times, and take the average value of the test data as the test result of the exhaust performance of the protective film.

2. The test method for detecting the exhaust performance of the protective film according to claim 1, characterized in that: In step S1 and step S2, the temperature of the bonding environment is 24±4° C. and the relative humidity is 50-75%.

3. The test method for detecting the exhaust performance of the protective film according to claim 2, characterized in that: In step S1, the cutting specification is 100-150mm*100-150mm.

4. The test method for detecting the exhaust performance of a protective film according to claim 3, characterized in that: In step S2, the solvent is one of ethyl acetate, anhydrous alcohol and isopropanol.

5. The test method for detecting the gas discharge property of a protective film according to claim 4, characterized in that: In step S2, the object to be attached is one of a glass plate, a metal plate, and a touch screen of a mobile phone.

6. The test method for detecting the gas discharge property of a protective film according to claim 5, characterized in that: In step S2, cleaning with a solvent is cleaning with a dust-free cloth or dust-free paper dipped in a corresponding solvent.

7. The testing method for detecting the gas discharge property of a protective film according to claim 6, characterized in that: The thickness of the protective film is 59-109 μm.

8. The testing method for detecting the gas discharge property of a protective film according to claim 7, characterized in that: The component of the adhesive surface of the protective film is one of silica gel, PU adhesive and acrylic adhesive.

9. The test method for detecting the gas discharge performance of a protective film according to claim 8, characterized in that: The base paper of the protective film is made of one of PET, PI and CPP.

10. The testing method for detecting the gas discharge property of a protective film according to claim 9, characterized in that: In step S3, the bottom length of the protective film pasted on the object is 10-15 mm.

Images