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CN-116297348-B - Haze testing method for anti-dazzle film

CN116297348BCN 116297348 BCN116297348 BCN 116297348BCN-116297348-B

Abstract

The invention discloses a haze test method of an anti-dazzle film, which relates to the technical field of film test and is used for detecting the internal haze and the external haze of the anti-dazzle film, wherein the method uses a film layer test structure, the film layer test structure comprises an anti-dazzle film layer and an auxiliary test layer which can be directly attached to the anti-dazzle film layer, and the anti-dazzle film layer is provided with an uneven anti-dazzle surface formed by anti-dazzle particles; the auxiliary test layer is provided with a flexible bonding surface which can be directly attached to the anti-dazzle surface and can transmit light rays. According to the testing method, the auxiliary testing layer which can be directly attached to the anti-dazzle film layer and is matched with the anti-dazzle film layer in refractive index is selected to attach to the anti-dazzle film layer to form the film layer testing structure for detection, so that the measuring steps are simplified, the measuring period is saved, meanwhile, the attaching quality can be effectively controlled by controlling parameters such as the attaching angle of the auxiliary testing layer and the anti-dazzle film layer, and the defect that air bubbles appear on the attaching surface is avoided.

Inventors

  • YU PEIQIANG
  • LIU SHIQIN
  • LV JINGBO

Assignees

  • 江苏日久光电股份有限公司

Dates

Publication Date
20260505
Application Date
20230406

Claims (10)

  1. 1. A haze test method for an antiglare film for detecting an inner haze and an outer haze of the antiglare film, characterized in that the method uses a film layer test structure comprising an antiglare film layer and an auxiliary test layer; The antiglare film layer has an rugged antiglare surface formed from antiglare particles; the auxiliary test layer is provided with a flexible bonding surface which can be directly attached to the anti-dazzle surface and can transmit light rays; the test method comprises the following steps: 1) The total Haze of the anti-dazzle film layer is measured, namely the anti-dazzle film layer is cut into the size which accords with the test, and then the anti-dazzle film layer is put into a Haze meter for measurement, so that the total Haze of the anti-dazzle film layer can be obtained and recorded as Haze Total (S) ; 2) Attaching an auxiliary test layer, namely enabling the whole auxiliary test layer to be inclined and the flexible bonding surface to face the anti-dazzle surface of the anti-dazzle film layer, then pressing the bottom of the inclined surface onto the anti-dazzle surface by using an attaching roller, keeping constant pressure to push the attaching roller forwards, and simultaneously pulling the non-attaching area of the auxiliary test layer backwards towards the opposite side of the advancing direction of the attaching roller until the auxiliary test layer is completely attached to the anti-dazzle surface, so as to obtain a film layer test structure for detection; 3) The internal Haze of the anti-dazzle film layer is measured, namely the film layer test structure is cut into a size which accords with the test, and then the film layer test structure is put into a Haze meter for measurement, so that the internal Haze of the anti-dazzle film layer can be obtained and is recorded as Haze Inner part ; 4) The external Haze of the anti-dazzle film layer is obtained by subtracting the internal Haze of the anti-dazzle film layer from the total Haze of the anti-dazzle film layer, namely Haze Outer part ＝Haze Total (S) -Haze Inner part ; Wherein, the included angle between the plane of the non-attached area of the auxiliary test layer in the step 2) and the plane of the non-attached area of the anti-dazzle film layer is 105-135 degrees.
  2. 2. The method for testing the haze of the antiglare film according to claim 1, wherein the refractive index of the antiglare particles in the antiglare film layer is denoted by N 1 , and the refractive index of the auxiliary test layer is denoted by N 2 ,|N 1 －N 2 |or less than 0.01.
  3. 3. The method according to claim 1, wherein the pressure of the bonding roller in the step 2) is 50 to 100n and the advancing speed is 0.02 to 0.03m/s.
  4. 4. The method for testing the haze of an antiglare film according to claim 1, wherein the thickness of the auxiliary test layer is 1.5 to 3.5 times the particle size of the antiglare particles in the antiglare film layer.
  5. 5. The method for testing the haze of the antiglare film according to claim 1, wherein the auxiliary test layer is an OCA adhesive film layer.
  6. 6. The method according to claim 5, wherein release films are provided on both sides of the OCA film layer when the OCA film layer is not attached, wherein: In the step 2), a release film on one side of the OCA adhesive film layer is removed to be used as a flexible adhesive surface before the OCA adhesive film layer is attached; and 3) when the internal haze of the anti-dazzle film layer is measured in the step 3), the release film on the other side of the OCA film layer is removed.
  7. 7. The method for testing the haze of the antiglare film according to claim 1, wherein the pull force of the non-bonded region of the auxiliary test layer in step 2) pulled back toward the opposite side of the advancing direction of the bonding roller is 40 to 90n.
  8. 8. The method for testing the haze of the antiglare film according to claim 1, wherein the antiglare surface of the antiglare film layer is cleaned with a cleaning solution, which is absolute ethanol, before the total haze of the antiglare film layer in step 1) is measured.
  9. 9. The method for testing the haze of the antiglare film according to claim 1, wherein the angle between the plane in which the laminating roller advances and the plane in which the laminated region of the antiglare film layer is present in step 2) is 40 ° to 50 °.
  10. 10. The method for testing the haze of the antiglare film according to claim 1, wherein the method uses a bonding device, and wherein a spraying mechanism, an auxiliary test layer mounting mechanism and a bonding mechanism are provided at an upper end of the bonding device, and wherein the bonding mechanism is located between the spraying mechanism and the auxiliary test layer mounting mechanism.

Description

Haze testing method for anti-dazzle film Technical Field The invention relates to the technical field of film testing, in particular to a haze testing method of an anti-dazzle film. Background Along with the rapid progress and development of science, an Anti-dazzle film (Anti-GLAREFILMS, abbreviated as 'AG film') is widely applied to various electronic equipment and automobile fields and is used for solving the problem that the glare effect is caused by the fact that light cannot be diffusely reflected, the glare not only affects the visual effect of people, but also has potential safety hazards seriously. And the antiglare film comprises three main components, light scattering particles, a binder resin, and a substrate. The antiglare film is produced by coating a solution of light scattering particles and a binder resin on a substrate, and after the solvent evaporates, the surface of the coating becomes rough due to the light scattering particles, thereby achieving an antiglare effect. For an antiglare film, the haze caused by its surface roughness is referred to as external haze. In contrast, the internal haze is caused by the difference in refractive index between the particles and the resin, and the internal haze and the external haze constitute the total haze of the antiglare film. When the internal haze or the external haze is increased, the effect of light scattering is enhanced and the glare effect is suppressed. The internal haze then helps to reduce "glare" from the interior, but the image display effect becomes whitish, and the perceived black density decreases with increasing internal haze. Therefore, according to different scenes and use requirements, the design of the internal and external haze of the antiglare film is important for the display technology, and further, the detection of the internal and external haze is also important. Chinese patent publication No. CN111045119B discloses a surface treatment film and a polaroid thereof, and the surface treatment film has excellent anti-dazzle function and anti-flash point function by controlling the proportion of internal haze to total haze, and is particularly suitable for the surface of a high-definition liquid crystal panel. A transparent coating layer is coated on the surface of an AG film by using a coating instrument such as a silk rod. The method comprises the steps of preparing a new coating liquid by mixing an organic solvent with an acrylic monomer or an acrylic oligomer, selecting a proper silk rod to control the thickness of the coating, drying in an oven and curing by UV light to fill up convex-concave particles on the surface of an AG film, and performing an internal haze test in the mode. The haze in the test is complex in operation, consumes long time and is not suitable for mass production. Disclosure of Invention In order to solve the problems, the invention aims to provide a haze testing method of an anti-dazzle film, which can simplify the measurement steps, save the measurement time and ensure the measurement precision. In order to achieve the above object, the present invention provides a haze test method of an antiglare film for detecting an inner haze and an outer haze of the antiglare film, using a film layer test structure including an antiglare film layer and an auxiliary test layer; The antiglare film layer has an rugged antiglare surface formed from antiglare particles; the auxiliary test layer is provided with a flexible bonding surface which can be directly attached to the anti-dazzle surface and can transmit light rays; the test method comprises the following steps: 1) The total Haze of the anti-dazzle film layer is measured, namely the anti-dazzle film layer is cut into the size which accords with the test, and then the anti-dazzle film layer is put into a Haze meter for measurement, so that the total Haze of the anti-dazzle film layer can be obtained and recorded as Haze Total (S) ; 2) Attaching an auxiliary test layer, namely enabling the whole auxiliary test layer to be inclined and the flexible bonding surface to face the anti-dazzle surface of the anti-dazzle film layer, then pressing the bottom of the inclined surface onto the anti-dazzle surface by using an attaching roller, keeping constant pressure to push the attaching roller forwards, and simultaneously pulling the non-attaching area of the auxiliary test layer backwards towards the opposite side of the advancing direction of the attaching roller until the auxiliary test layer is completely attached to the anti-dazzle surface, so as to obtain a film layer test structure for detection; 3) The internal Haze of the anti-dazzle film layer is measured, namely the film layer test structure is cut into a size which accords with the test, and then the film layer test structure is put into a Haze meter for measurement, so that the internal Haze of the anti-dazzle film layer can be obtained and is recorded as Haze Inner part ; 4) The external Haze of the anti