Silicone optical film with release layers
An optical thin film and silicone technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems of poor durability, reworkability, cost increase, difficult operation, etc., and achieve improved durability and improved processability performance and improved reworkability
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Embodiment 1
[0038] Example 1. Methods and materials
[0039] In this example, the present inventors describe how to prepare the optical film of the present invention.
[0040] Supports and liners are available from commercial suppliers for optical films and are known to those skilled in the art. Representative material is clear polyester film, for example, 3M TM 5993 Second liner (3M TM 5993SecondaryLiner).
[0041] Silicone gels are available from commercial suppliers well known to those skilled in the art in thicknesses ranging from 0.05 mm to 2.0 mm. The first breakaway tension (between the support surface of the silicone gel and the support) was 0.635 N / cm. The second detachment tension (between the backing surface of the silicone gel and the backing) was 0.203 N / cm (JIS Z0237 method).
[0042] The silicone gel of the present invention has a refractive index greater than 1.4 (at 25° C., at 589 nm) when measured according to the methods of JIS K7412 and ASTMD542. The transmittanc...
Embodiment 2
[0044] Example 2. Reworkability
[0045] In this example, the inventors describe how to evaluate the reworkability of the optical films of the present invention.
[0046] The optical film sample was cut into 42mm long × 32mm wide pieces, and a 0.7mm thick glass piece (1737, Corning Incorporated) was attached to both sides by a laminating machine under high vacuum to form a glass-film-glass sandwich structure . In order to simulate the reprocessing process, a metal fixture is used to create a small gap between the film and the glass from the edge, and then, inject a few drops of low polarity organic solvent (such as isopropanol) into the gap, and the solvent runs along the gap between the film and the glass. Soak the interface to release adhesion. The glass is the last to separate from the monolithic structure. The optical film can then be peeled from another sheet of glass or the LCD, and its reworkability can be evaluated according to the criteria described below.
[0047...
Embodiment 3
[0048] Example 3. Durability
[0049] In this example, the inventors describe how to evaluate the durability of the optical film of the present invention.
[0050] The optical film sample was cut into pieces of 420mm×240mm, and 0.7mm-thick alkali-free glass pieces (1737, manufactured by Corning Incorporated) were attached on both sides in a crossed Nicol layout by means of a laminator. The laminate of the samples was autoclaved at 50° C. and 0.5 megapascal (Mpa) for 15 minutes so that the samples were completely attached to the non-alkali glass sheet. After this process, samples were stored at 80°C, 90°C, 95°C, 100°C, or 60°C / 90% relative humidity (RH) for 500 hours and then visually evaluated for blistering, peeling, or separation.
[0051] Samples that did not exhibit blistering, peeling or separation were considered to exhibit good durability. Samples exhibiting blistering, peeling, or separation require further evaluation to see if the blistering, peeling, or separation ...
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Abstract
Description
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Application Information
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