Method and system for detecting waterproofness of optical protective film

Abstract

The invention relates to the technical field of optical protective films, and particularly discloses a waterproofness detection method and system for an optical protective film, and the method comprises the steps: carrying out a water drop contact angle test on the optical protective film, constructing a sealed test cavity, carrying out a differential pressure and humidity penetration test, and calculating to obtain a water permeability value of the optical protective film. The optical protective film subjected to the differential pressure and humidity penetration test is subjected to a light-transmitting refractive index test, the light-transmitting refractive loss rate of the optical protective film is obtained through calculation, finally, the optical protective film is subjected to a moisture penetration conductivity test, the resistivity state expression value of the optical protective film is obtained through calculation, and a qualified signal of the optical protective film is obtained. The waterproof insulation performance of the optical protection film is judged, the conductivity of the optical protection film is further evaluated, and the situation that the use is affected due to the fact that the resistivity of the optical protection film is reduced in application is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of optical protective films, and in particular to a method and system for detecting the waterproofness of an optical protective film. Background Art

[0002] A protective film is a film used to protect vulnerable surfaces. Its purpose is to prevent the surface of the protected substrate from being damaged or contaminated during transportation, assembly or processing. The protective film will always be attached to the surface of the protected substrate. As an important functional film, optical protective film has a wide range of applications in photography, display, optical instruments and other fields. With the continuous development of science and technology, the performance requirements for optical protective films are getting higher and higher.

[0003] In order to protect the surface of optical films from damage during use, special optical protective films are usually required for surface protection. Optical protective films need to meet certain performance requirements during use, such as waterproofing and electrical resistance. In the existing production and testing process of optical protective films, the optical protective films cannot be tested simultaneously from multiple aspects, and the testing effect and results are single. Summary of the invention

[0004] The object of the present invention is to provide a method and system for detecting the water resistance of an optical protective film to solve the above-mentioned problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A method for detecting the water resistance of an optical protective film, comprising: Step 1: Perform a water drop contact angle test on the optical protective film, calculate and obtain the water drop contact angle SJA on the surface of the optical protective film, compare the water drop contact angle SJA with the qualified value SJhg of the water drop contact angle, and obtain a hydrophobic qualified signal; Step 2: Based on the hydrophobic qualified signal, a sealed test chamber is constructed to perform a differential pressure humidity penetration test, the water permeability value STA of the optical protective film is calculated, and compared with the water permeability threshold SThg to obtain a water permeability qualified signal; Step 3: Based on the qualified water permeability signal, take the optical protective film after the different pressure and humidity permeability test, perform a transmittance refractive index test, calculate the transmittance refractive index loss rate TGS of the optical protective film, and compare it with the transmittance refractive index loss rate threshold TGhg to obtain a permeability refractive index qualified signal; Step 4: Based on the qualified penetration refraction signal, perform a moisture penetration conductivity test on the optical protective film, calculate the resistivity state performance value DZb of the optical protective film, and compare the resistivity state performance value DZb with the qualified resistivity value DZhg to obtain a qualified signal for the optical protective film.

[0006] As a further solution of the present invention: the process of testing and calculating the water drop contact angle on the surface of the optical protective film includes: A01: Place the optical protective film flat on a horizontal test bench, divide the surface of the optical protective film into grids with unit length e, take any unit grid as the coordinate origin, then establish a grid coordinate system, and mark the coordinates of each grid area as (x, y); A02: Select several qualified test grid areas and mark them as r, where r is 1, 2, 3, etc., drop water on each qualified test grid area on the optical protective film, measure and determine the contact angle between the water drop on each qualified test grid area and the optical protective film, and record it as the contact angle value CTA r ; A03: All the contact angle values ​​of the qualified test grid area CTA r The mean value is calculated to obtain the water drop contact angle SJA.

[0007] As a further solution of the present invention: the qualified test grid area is selected in the following manner: Get the surface height value of the optical protective film at the center point of the grid area (x, y), recorded as H （x，y） , and simultaneously obtain the surface height values ​​of the center points of the eight adjacent grid areas of the grid area (x, y); Calculate the height difference between the center point of the grid area (x, y) and the center points of the eight adjacent grid areas respectively, and obtain the maximum height difference, which is recorded as HCax （x，y） ; If the maximum height difference HCax （x，y） If the height difference is less than or equal to the height difference threshold, the grid area (x, y) is a qualified test grid area.

[0008] As a further solution of the present invention: the contact angle value between the water droplet and the optical protective film in the grid area is determined as follows: A water drop is dropped on the qualified test grid area r on the optical protective film, and a line is drawn from the center point of the qualified test grid area r where the water drop is located to the center points of the eight adjacent grid areas to determine the contact angle measurement point of the water drop, and eight contact angle values ​​of the water drop in the qualified test grid area r are measured; The eight contact angle values ​​are averaged to obtain the average contact angle of the qualified test grid area r. The contact angle value closest to the average contact angle among the eight contact angle values ​​is taken as the contact angle value CTA of the qualified test grid area r. r .

[0009] As a further solution of the present invention: the test calculation steps of the water permeability value STA include: B01: Construct a sealed test chamber, obtain the air pressure values ​​in the high humidity test chamber and the dry test chamber at each detection time node, and record them as the high humidity air pressure value HYC i And dry air pressure value LYC i ; B02: The detection period T is set to the unit time t as the detection time interval, and each detection time node is marked as i, where i is 1, 2, 3, etc.; Get the total water permeability value at each detection time node and mark it as QW i ; B03: Obtain the basic test data of the optical protective film test, including the protective film thickness value DH and the protective film area value SM; pass Calculate the water permeability value SP at each detection time node i Obtain a water permeability value set within a detection period T; The maximum water permeability value in the water permeability value set is obtained and recorded as the water permeability value STA.

[0010] As a further solution of the present invention: the sealed test chamber is constructed as follows: an optical protective film is fixedly placed in the middle of the sealed test chamber to divide the sealed test chamber into two test chambers, humidity is injected into any test chamber, and the test chamber is marked as a high-humidity test chamber, and the other test chamber is marked as a dry test chamber.

[0011] As a further solution of the present invention: the air pressure value in the high humidity test chamber is higher than the air pressure value in the dry test chamber, and the temperatures in the high humidity test chamber and the dry test chamber are the same.

[0012] As a further solution of the present invention: the light transmission refraction loss rate of the optical protective film is calculated as follows: C01: Take the optical protective film after the differential pressure humidity penetration test, use the test light source with light intensity QR to illuminate the center points of several qualified test grid areas on the protective film, and then obtain the transmitted light intensity of the center point of each qualified test grid area, recorded as TG r ; pass Calculate the transmittance value TL of the center point of each qualified test grid area r ; C02: Obtain the initial transmittance value TS of the optical protective film by Calculate the point transmittance refraction loss value TDS of the optical protective film r ; C03: Point transmittance refraction loss value TDS r The average value is calculated to obtain the light transmission refraction loss rate TGS of the optical protective film.

[0013] As a further solution of the present invention: the calculation method of the resistivity state performance value DZb of the optical protective film includes the following steps: W1: Cut the optical protective film with qualified penetration refraction signal with length a and width b to obtain several protective film strips, and mark the protective film strips as j, where j is 1, 2, 3, etc.; test the conductivity of each protective film strip, test the resistance value of each protective film strip, and mark it as R j ; W2: Pass Calculate the resistivity value DL of each protective film strip j , DH is the thickness of the protective film; W3: Calculate the average value of the resistivity value to obtain the single strip resistivity mean value DLZ, and then calculate the standard deviation of the resistivity value to obtain the resistivity standard deviation value DLC of a single strip of the protective film; Then pass The resistivity state performance value DZb is obtained by calculation.

[0014] As a further solution of the present invention: a water resistance detection system for an optical protective film, comprising: Hydrophobic detection module: Perform water drop contact angle test on the optical protective film, calculate and obtain the water drop contact angle SJA on the surface of the optical protective film, compare the water drop contact angle SJA with the qualified value SJhg of the water drop contact angle, and obtain a hydrophobic qualified signal; Permeation detection module: Based on the hydrophobic qualified signal, a sealed test chamber is constructed to perform a differential pressure humidity penetration test, the water permeability value STA of the optical protective film is calculated, and compared with the water permeability threshold SThg to obtain a water permeability qualified signal; Light transmission detection module: Based on the qualified water permeability signal, take the optical protective film after the different pressure and humidity permeability test, perform the light transmission and refractive index test, calculate the light transmission and refractive index loss rate TGS of the optical protective film, and compare it with the light transmission and refractive index loss rate threshold TGhg to obtain the permeability and refractive index qualified signal; Conductive detection module: Based on the qualified penetration refraction signal, the optical protective film is tested for moisture penetration conductivity, the resistivity state performance value DZb of the optical protective film is calculated, and the resistivity state performance value DZb is compared with the resistivity qualified value DZhg to obtain the qualified signal of the optical protective film.

[0015] Beneficial effects of the present invention: In the present invention, the optical protective films in the batch are randomly sampled, and then the hydrophobicity of the surface of the optical protective film is first detected, and the contact angle of the water drop on the flat and stable surface of the optical protective film is measured and calculated to determine whether the hydrophobicity of the surface of the optical protective film meets the requirements, so as to effectively evaluate the waterproofness of the surface of the optical protective film, and then a penetration test is performed by constructing a sealed test chamber, and the water permeability is calculated to achieve a quantitative measurement of the penetration performance of the optical protective film, and accurately evaluate the internal waterproof performance of the optical protective film. In addition, after the penetration test, the loss of the optical protective film in the process of light transmission is directly evaluated and calculated, and the influence of the optical protective film on light in the process of penetrating water is further measured and determined. Finally, when water penetrates the optical protective film, the resistivity test is performed to determine the waterproof insulation performance of the optical protective film, and the conductive performance of the optical protective film is further evaluated to avoid the situation where the resistivity of the optical protective film decreases during application and affects the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic flow chart of the method of the present invention; Figure 2 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1 As shown, the present invention is a method for detecting the water resistance of an optical protective film, comprising: Step 1: Take the optical protective film from the same batch, perform a water drop contact angle test on the optical protective film, calculate and obtain the water drop contact angle SJA on the surface of the optical protective film, compare the water drop contact angle SJA with the qualified value SJhg of the water drop contact angle, and obtain a hydrophobic qualified signal; The process of testing and calculating the water drop contact angle on the surface of the optical protective film includes: A01: Place the optical protective film flat on a horizontal test bench, divide the surface of the optical protective film into grids with unit length e, take any unit grid as the coordinate origin, then establish a grid coordinate system, and mark the coordinates of each grid area as (x, y); A02: Select several qualified test grid areas and mark them as r, where r is 1, 2, 3, etc. Add water drops on each qualified test grid area on the optical protective film, measure and determine the contact angle between the water drop on each qualified test grid area and the optical protective film, and record it as CTA r ; The selection method for the qualified test grid area is as follows: Get the surface height value of the optical protective film at the center point of the grid area (x, y), recorded as H （x，y） , and at the same time obtain the surface height values ​​of the center points of the eight adjacent grid areas of the grid area (x, y), which are recorded as H （x-1，y+1） , H （x，y+1） , H （x+1，y+1） , H （x-1，y） , H （x+1，y） , H （x-1，y-1） , H （x，y-1） and H （x+1，y-1） ; Calculate the height difference between the center point of the grid area (x, y) and the center points of the eight adjacent grid areas respectively, and obtain the maximum height difference, which is recorded as HCax （x，y） ; If the maximum height difference HCax （x，y） If the height difference is less than or equal to the height difference threshold, the grid area (x, y) is a qualified test grid area and can be used as a contact angle test area; During the test, determine the qualified test grid area to avoid the situation where the surface of the optical protective film is not on the same horizontal plane due to the shape characteristics of the optical protective film, thereby affecting the test results, and ensure the accuracy of the contact angle measurement process; The method for determining the contact angle between a water droplet and the optical protective film in the grid area is: A021: Add a water droplet to the qualified test grid area r on the optical protective film, connect the center point of the qualified test grid area r where the water droplet is located to the center points of the 8 adjacent grid areas, determine the contact angle measurement point of the water droplet, and measure and obtain the 8 contact angle values ​​of the water droplet in the qualified test grid area r; A022: Calculate the average of the eight contact angle values ​​to obtain the average contact angle of the qualified test grid area r. Take the contact angle value closest to the average contact angle among the eight contact angle values ​​and record it as the contact angle value CTA of the qualified test grid area r r ; A03: All the contact angle values ​​of the qualified test grid area CTA r Perform mean calculation to obtain the water drop contact angle SJA; By measuring the contact angle of the water drop at multiple angles, the water drop contact angle is calculated to further improve the accuracy of the water drop contact angle measurement; In addition, the water drop contact angle SJA is compared with the qualified value of the water drop contact angle SJhg: If the water drop contact angle SJA is greater than or equal to the qualified value of the water drop contact angle SJhg, a hydrophobic qualified signal is generated; at this time, it means that the hydrophobicity of the water drop on the surface of the optical protective film can meet the requirements; If the water drop contact angle SJA is less than the qualified value SJhg of the water drop contact angle, a hydrophobic unqualified signal is generated; Step 2: Based on the hydrophobic qualified signal, a sealed test chamber is constructed to perform a differential pressure humidity penetration test, the water permeability value STA of the optical protective film is calculated, and compared with the water permeability threshold SThg to obtain a water permeability qualified signal; The test calculation steps of the water permeability value STA include: B01: Construct a sealed test chamber, fix the optical protective film in the middle of the sealed chamber, divide the sealed test chamber into two test chambers, inject humidity into one test chamber, and mark the test chamber as a high-humidity test chamber, and mark the other test chamber as a dry test chamber; obtain the air pressure values ​​in the high-humidity test chamber and the dry test chamber at each detection time node, and record them as high-humidity air pressure values ​​HYC i and dry air pressure value LYC i In this step, since the water permeability of the optical protective film is measured, the air pressure value in the high humidity test chamber should be higher than the air pressure value in the dry test chamber. At this time, the water permeability at each detection time node can be accurately measured. At the same time, in order to avoid liquefaction in the air and affect the accuracy of the detection, it is necessary to ensure that the temperature in the two test chambers is the same; B02: The detection period T is set to the unit time t as the detection time interval, and each detection time node is marked as i, where i is 1, 2, 3, etc.; Get the total water permeability value at each detection time node and mark it as QW i It should be noted that the total water permeability at each detection time node is the total water permeability from the initial moment to the current detection time node; B03: Obtain the basic test data of the optical protective film test, including the protective film thickness value DH and the protective film area value SM; pass Calculate the water permeability value SP at each detection time node i Obtain a water permeability value set within a detection period T; The maximum water permeability value in the water permeability value set is obtained and recorded as the water permeability value STA; Among them, the water permeability value STA is compared with the water permeability threshold value SThg: If the water permeability value STA is less than or equal to the water permeability threshold value SThg, a water permeability qualified signal is generated; If the water permeability value STA is greater than the water permeability threshold value SThg, a water permeability failure signal is generated; By constructing a sealed test chamber and adjusting the humidity difference on both sides of the optical protective film, the permeability of the optical protective film is tested, and the water permeability is calculated based on the test results to achieve quantitative calculation of the water permeability, which has a certain reference significance in evaluating the permeability of the optical protective film. Compared with the hydrophobicity test, it not only realizes the external waterproof test of the optical protective film, but also further realizes the precise measurement of the internal waterproofness of the optical protective film; Step 3: Based on the qualified water permeability signal, take the optical protective film after the different pressure and humidity permeability test, perform a transmittance refractive index test, calculate the transmittance refractive index loss rate TGS of the optical protective film, and compare it with the transmittance refractive index loss rate threshold TGhg to obtain a permeability refractive index qualified signal; Specifically, the calculation method for the light transmission and refraction loss rate of the optical protective film is: C01: Take the optical protective film after the differential pressure humidity penetration test, use the test light source with light intensity QR to illuminate the center points of several qualified test grid areas on the protective film, and then obtain the transmitted light intensity of the center point of each qualified test grid area, recorded as TG r ; pass Calculate the transmittance value TL of the center point of each qualified test grid area r ; C02: Obtain the initial transmittance value TS of the optical protective film by Calculate the point transmittance refraction loss value TDS of the optical protective film r ; C03: Point transmittance refraction loss value TDS r The average value is calculated to obtain the light transmission refraction loss rate TGS of the optical protective film; Then, the transmission refractive loss rate TGS is compared with the transmission refractive loss rate threshold TGhg: If the transmission refraction loss rate TGS is greater than or equal to the transmission refraction loss rate threshold TGhg, a transmission refraction failure signal is generated; If the transmission refraction loss rate TGS is less than the transmission refraction loss rate threshold TGhg, a transmission refraction qualified signal is generated; After testing the waterproofness of the optical protective film inside and outside, if water penetrates the optical protective film, measure whether the light transmission and refraction performance is abnormal, so as to avoid the change of light transmission and refraction performance caused by water penetration during the use of the optical protective film; Step 4: Based on the qualified permeation refraction signal, the optical protective film is tested for water permeation conductivity, the resistivity state performance value DZb of the optical protective film is calculated, and the resistivity state performance value DZb is compared with the qualified resistivity value DZhg to obtain a qualified signal of the optical protective film; The calculation method of the resistivity state performance value DZb of the optical protective film includes the following steps: W1: Cut the optical protective film with qualified penetration refraction signal with length a and width b to obtain several protective film strips, and mark the protective film strips as j, where j is 1, 2, 3, etc.; test the conductivity of each protective film strip, test the resistance value of each protective film strip, and mark it as R j ; W2: Pass Calculate the resistivity value DL of each protective film strip j ; W3: Calculate the average value of the resistivity value to obtain the single strip resistivity mean value DLZ, and then calculate the standard deviation of the resistivity value to obtain the resistivity standard deviation value DLC of a single strip of the protective film; Then pass Calculate and obtain the resistivity state performance value DZb; Compare the resistivity state performance value DZb with the resistivity qualified value DZhg: If the resistivity state performance value DZb is greater than the resistivity qualified value DZhg, a qualified signal of the optical protective film is generated; If the resistivity state performance value DZb is less than or equal to the resistivity qualified value DZhg, an optical protective film unqualified signal is generated; By randomly sampling the optical protective films in the batch, the hydrophobicity of the surface of the optical protective film is first tested, and the contact angle of the water droplets on the flat and stable surface of the optical protective film is measured and calculated to determine whether the hydrophobicity of the surface of the optical protective film meets the requirements. The waterproofness of the surface of the optical protective film can be effectively evaluated. Then, a penetration test is performed by constructing a sealed test chamber, and the water permeability is calculated to achieve a quantitative measurement of the penetration performance of the optical protective film and accurately evaluate the internal waterproof performance of the optical protective film. In addition, after the penetration test, the loss of the optical protective film in the process of light transmission is directly evaluated and calculated, and the effect of the optical protective film on light in the process of penetrating water is further measured and determined. Finally, when water penetrates the optical protective film, the resistivity is tested to determine the waterproof insulation performance of the optical protective film, and the conductive performance of the optical protective film is further evaluated to avoid the situation where the resistivity of the optical protective film decreases during application and affects its use.

[0020] Example 2: Reference Figure 2As shown, this embodiment provides a water resistance detection system for an optical protective film, comprising: Hydrophobic detection module: Perform water drop contact angle test on the optical protective film, calculate and obtain the water drop contact angle SJA on the surface of the optical protective film, compare the water drop contact angle SJA with the qualified value SJhg of the water drop contact angle, and obtain a hydrophobic qualified signal; Permeation detection module: Based on the hydrophobic qualified signal, a sealed test chamber is constructed to perform a differential pressure humidity penetration test, the water permeability value STA of the optical protective film is calculated, and compared with the water permeability threshold SThg to obtain a water permeability qualified signal; Light transmission detection module: Based on the qualified water permeability signal, take the optical protective film after the different pressure and humidity permeability test, perform the light transmission and refractive index test, calculate the light transmission and refractive index loss rate TGS of the optical protective film, and compare it with the light transmission and refractive index loss rate threshold TGhg to obtain the permeability and refractive index qualified signal; Conductive detection module: Based on the qualified penetration refraction signal, the optical protective film is tested for moisture penetration conductivity, the resistivity state performance value DZb of the optical protective film is calculated, and the resistivity state performance value DZb is compared with the resistivity qualified value DZhg to obtain the qualified signal of the optical protective film.

[0021] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for detecting the water resistance of an optical protective film, characterized in that: include: Step 1: Perform a water drop contact angle test on the optical protective film, calculate and obtain the water drop contact angle SJA on the surface of the optical protective film, compare the water drop contact angle SJA with the qualified value SJhg of the water drop contact angle, and obtain a hydrophobic qualified signal; Step 2: Based on the hydrophobic qualified signal, a sealed test chamber is constructed to perform a differential pressure humidity penetration test, the water permeability value STA of the optical protective film is calculated, and compared with the water permeability threshold SThg to obtain a water permeability qualified signal; Step 3: Based on the qualified water permeability signal, take the optical protective film after the different pressure and humidity permeability test, perform a transmittance refractive index test, calculate the transmittance refractive index loss rate TGS of the optical protective film, and compare it with the transmittance refractive index loss rate threshold TGhg to obtain a permeability refractive index qualified signal; Step 4: Based on the qualified penetration refraction signal, perform a moisture penetration conductivity test on the optical protective film, calculate the resistivity state performance value DZb of the optical protective film, and compare the resistivity state performance value DZb with the qualified resistivity value DZhg to obtain a qualified signal for the optical protective film.

2. The method for detecting the water resistance of an optical protective film according to claim 1, characterized in that: The process of testing and calculating the water drop contact angle on the surface of the optical protective film includes: A01: Place the optical protective film flat on a horizontal test bench, divide the surface of the optical protective film into grids with unit length e, take any unit grid as the coordinate origin, then establish a grid coordinate system, and mark the coordinates of each grid area as (x, y); A02: Select several qualified test grid areas and mark them as r, where r is 1, 2, 3, etc., drop water on each qualified test grid area on the optical protective film, measure and determine the contact angle between the water drop on each qualified test grid area and the optical protective film, and record it as the contact angle value CTA r ; A03: All the contact angle values ​​of the qualified test grid area CTA r The mean value is calculated to obtain the water drop contact angle SJA.

3. The method for detecting the water resistance of an optical protective film according to claim 2, characterized in that: The qualified test grid area is selected in the following manner: Get the surface height value of the optical protective film at the center point of the grid area (x, y), recorded as H （x，y） , and simultaneously obtain the surface height values ​​of the center points of the eight adjacent grid areas of the grid area (x, y); Calculate the height difference between the center point of the grid area (x, y) and the center points of the eight adjacent grid areas respectively, and obtain the maximum height difference, which is recorded as HCax （x，y） ; If the maximum height difference HCax （x，y） If the height difference is less than or equal to the height difference threshold, the grid area (x, y) is a qualified test grid area.

4. The method for detecting the water resistance of an optical protective film according to claim 3, characterized in that: The contact angle between the water droplet and the optical protective film in the grid area is determined as follows: A water drop is dropped on the qualified test grid area r on the optical protective film, and a line is drawn from the center point of the qualified test grid area r where the water drop is located to the center points of the eight adjacent grid areas to determine the contact angle measurement point of the water drop, and eight contact angle values ​​of the water drop in the qualified test grid area r are measured; The eight contact angle values ​​are averaged to obtain the average contact angle of the qualified test grid area r. The contact angle value closest to the average contact angle among the eight contact angle values ​​is taken as the contact angle value CTA of the qualified test grid area r. r .

5. The method for detecting the water resistance of an optical protective film according to claim 1, characterized in that: The test calculation steps of the water permeability value STA include: B01: Construct a sealed test chamber, obtain the air pressure values ​​in the high humidity test chamber and the dry test chamber at each detection time node, and record them as the high humidity air pressure value HYC i and dry air pressure value LYC i ; B02: The detection period T is set to the unit time t as the detection time interval, and each detection time node is marked as i, where i is 1, 2, 3, etc.; Get the total water permeability value at each detection time node and mark it as QW i ; B03: Obtain the basic test data of the optical protective film test, including the protective film thickness value DH and the protective film area value SM; pass Calculate the water permeability value SP at each detection time node i Obtain a water permeability value set within a detection period T; The maximum water permeability value in the water permeability value set is obtained and recorded as the water permeability value STA.

6. The method for detecting the water resistance of an optical protective film according to claim 5, characterized in that: The sealed test chamber is constructed by fixing an optical protective film in the middle of the sealed chamber to divide the sealed test chamber into two test chambers, injecting humidity into any one of the test chambers, and marking the test chamber as a high-humidity test chamber, and marking the other test chamber as a dry test chamber.

7. The method for detecting the water resistance of an optical protective film according to claim 6, characterized in that: The air pressure value in the high humidity test chamber is higher than the air pressure value in the dry test chamber, and the temperatures in the high humidity test chamber and the dry test chamber are the same.

8. The method for detecting water resistance of an optical protective film according to claim 1, characterized in that: The calculation method of the light transmission refraction loss rate of the optical protective film is: C01: Take the optical protective film after the differential pressure humidity penetration test, use the test light source with light intensity QR to illuminate the center points of several qualified test grid areas on the protective film, and then obtain the transmitted light intensity of the center point of each qualified test grid area, recorded as TG r ; pass Calculate the transmittance value TL of the center point of each qualified test grid area r ; C02: Obtain the initial transmittance value TS of the optical protective film by Calculate the point transmittance refraction loss value TDS of the optical protective film r ; C03: Point transmittance refraction loss value TDS r The average value is calculated to obtain the light transmission refraction loss rate TGS of the optical protective film.

9. The method for detecting water resistance of an optical protective film according to claim 1, characterized in that: The calculation method of the resistivity state performance value DZb of the optical protective film includes the following steps: W1: Cut the optical protective film with qualified penetration refraction signal with length a and width b to obtain several protective film strips, and mark the protective film strips as j, where j is 1, 2, 3, etc.; test the conductivity of each protective film strip, test the resistance value of each protective film strip, and mark it as R j ; W2: Pass Calculate the resistivity value DL of each protective film strip j , DH is the thickness of the protective film; W3: Calculate the average value of the resistivity value to obtain the single strip resistivity mean value DLZ, and then calculate the standard deviation of the resistivity value to obtain the resistivity standard deviation value DLC of a single strip of the protective film; Then pass The resistivity state performance value DZb is obtained by calculation.

10. A waterproofness detection system for an optical protective film, characterized in that: The system is used to perform the waterproof detection method as described in any one of claims 1 to 9, comprising: Hydrophobic detection module: Perform water drop contact angle test on the optical protective film, calculate and obtain the water drop contact angle SJA on the surface of the optical protective film, compare the water drop contact angle SJA with the qualified value SJhg of the water drop contact angle, and obtain a hydrophobic qualified signal; Permeation detection module: Based on the hydrophobic qualified signal, a sealed test chamber is constructed to perform a differential pressure humidity penetration test, the water permeability value STA of the optical protective film is calculated, and compared with the water permeability threshold SThg to obtain a water permeability qualified signal; Light transmission detection module: Based on the qualified water permeability signal, take the optical protective film after the different pressure and humidity permeability test, perform the light transmission and refractive index test, calculate the light transmission and refractive index loss rate TGS of the optical protective film, and compare it with the light transmission and refractive index loss rate threshold TGhg to obtain the permeability and refractive index qualified signal; Conductive detection module: Based on the qualified penetration refraction signal, the optical protective film is tested for moisture penetration conductivity, the resistivity state performance value DZb of the optical protective film is calculated, and the resistivity state performance value DZb is compared with the resistivity qualified value DZhg to obtain the qualified signal of the optical protective film.

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