A kind of hue control method of tn/stn polarizing film
A polarizing film and optical film technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as increased production costs, waste, and environmental pollution, and achieve the effects of reducing emissions, reducing consumption, and reducing operational difficulty
Active Publication Date: 2021-12-24
南京汉旗新材料股份有限公司
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- Description
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- Application Information
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Problems solved by technology
However, this method increases the production cost of raw materials, time and labor, causes unnecessary waste and a certain degree of environmental pollution
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] Japanese PVA
[0036] Washing setting: 28°C,
[0037] Swelling setting: 30°C
[0038] Specific process:
[0039] PVA unwinds into the washing tank→swelling tank→dyeing tank→cleaning tank→stretching tank→color replenishing tank→squeezes the remaining visible water on the film surface→enters the PVA oven→composites→drying→winding→inspection.
Embodiment 2
[0047] Domestic PVA
[0048] Washing setting: 30°C,
[0049] Swelling setting: 32°C
[0050] Specific process:
[0051] PVA unwinds into the washing tank→swelling tank→dyeing tank→cleaning tank→stretching tank→color replenishing tank→squeezes the remaining visible water on the film surface→enters the PVA oven→composites→drying→winding→inspection.
[0052] Performance Testing
[0053] The test result of table 1 embodiment 1,2 and comparative example 1
[0054]
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Abstract
The invention relates to a method for regulating the hue of a TN / STN polarizing film, which belongs to the technical field of liquid crystal display. The hue control method provided by the invention mainly includes the following steps: PVA is sequentially washed with water, swollen at 25° C. to 35° C., dyed, washed, stretched, and color-supplemented to obtain an optical film with polarizing effect. By adopting the hue control method of the invention, the consumption of chemical raw materials is reduced, the cost of materials is reduced, the discharge of excess solution is reduced, and the environment is effectively protected. At the same time, it has the advantages of simple operation, stable control, and stable color tone of the product, which meets the needs of customers and has excellent stability.
Description
technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a method for regulating the hue of a TN / STN polarizing film. During the production of PVA (polyvinyl alcohol film), the main material of the polarizer film, the dyeing effect is controlled by controlling its swelling degree, and then the hue of the product is adjusted. Background technique [0002] The main raw material for the production of polarizers is a layer of polyvinyl alcohol film (PVA) and two layers of triacetate cellulose (TAC). An optical film with polarizing effect is produced. This optical film can be tested by a spectrometer to check whether its optical index is qualified, mainly through the optical transmittance (T s , T p , T c , T uv ), optical polarization (P) and chromaticity (Hue) (color coordinates L*S, a*s, b*s) to judge. TN / STN has only two kinds of light and dark in the liquid crystal display (LCD), which can be called bla...
Claims
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IPC IPC(8): G02F1/1335G02F1/139
Inventor 田巧云朱虹李建红
Owner 南京汉旗新材料股份有限公司