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Manufacturing method of one-sided protective polarizing film with adhesive layer

A technology of an adhesive layer and a manufacturing method, which can be applied to film/sheet-like adhesives, adhesives, polarizers, etc., and can solve problems such as insufficient thermal shock durability

Active Publication Date: 2021-02-09
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, the durability of the one-side protective polarizing film against the above-mentioned thermal shock is insufficient, so polarizing films provided with a protective layer (transparent resin layer) on the polarizer side have been proposed (Patent Documents 2 and 3)

Method used

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  • Manufacturing method of one-sided protective polarizing film with adhesive layer
  • Manufacturing method of one-sided protective polarizing film with adhesive layer
  • Manufacturing method of one-sided protective polarizing film with adhesive layer

Examples

Experimental program
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Effect test

Embodiment 1

[0231]

[0232] Using a coating device (specifically, a gravure coater), on the surface of the polarizer of the above-mentioned one-side protective polarizing film (the surface of the polarizer without a protective film) conveyed at 20 m / min, the thickness after drying is 1 μm. The material for forming the transparent resin layer (coating liquid) was applied in the same way, and then dried with hot air at 85° C. for 30 seconds to prepare a one-side protective polarizing film with a transparent resin layer.

[0233]

[0234] Next, without winding the above-obtained one-side protective polarizing film with a transparent resin layer into a roll, the above-mentioned transparent resin layer was continuously bonded (specifically, after 18 seconds) and formed on the above-mentioned release sheet (separator). The pressure-sensitive adhesive layer on the peeling-treated surface was prepared to produce a pressure-sensitive adhesive layer-attached polarizing film. Then, the polarizin...

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PUM

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Abstract

The present invention relates to a method for producing a single-sided protective polarizing film with an adhesive layer, the thickness of the single-sided protective polarizing film with an adhesive layer is 10 μm or less, and the polarizing film with specific optical characteristics is obtained only A polarizer having a protective film on one side of the mirror and protecting the polarizing film on one side has a transparent resin layer and an adhesive layer sequentially from the side thereof. After layering, step (3) is carried out. In the above step (1), a curing agent containing a resin component or capable of constituting a resin layer is applied to the polarizer side of the above-mentioned single-side protective polarizing film while conveying the above-mentioned one-sided protective polarizing film. The coating solution of active ingredients, the above-mentioned step (2) is carried out after the above-mentioned coating step (1), in the above-mentioned step (2), the above-mentioned coating solution is solidified or hardened, and the above-mentioned step (3) does not make the obtained tape transparent The protective polarizing film on one side of the resin layer is wound into a roll, and an adhesive layer is formed on the above-mentioned transparent resin layer. Even when a thin one-sided protective film is used, a transparent resin layer can be stably formed, followed by an adhesive layer.

Description

technical field [0001] The present invention relates to a method for producing a one-side protective polarizing film with an adhesive layer. The single-sided protective polarizing film with the pressure-sensitive adhesive layer obtained by the above production method can be used alone to form image display devices such as liquid crystal display devices (LCD) and organic EL display devices, or as a single-sided protective film with the pressure-sensitive adhesive layer laminated. The form of the optical film of the polarizing film forms an image display device such as a liquid crystal display device (LCD) and an organic EL display device. Background technique [0002] The market demand for liquid crystal display devices is rapidly expanding in clocks, cell phones, PDAs, notebook computers, computer monitors, DVD players, TVs, and the like. The liquid crystal display device visualizes the polarization state caused by the switching of liquid crystal, and according to the displ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B32B7/02B32B27/30C09J7/20
CPCB32B27/30G02B5/30C09J7/20G02B5/305B32B7/12B32B27/306C09J7/245B32B2307/42B32B2551/00B32B2307/412B32B7/023
Inventor 上野友德三田聪司岸敦史池岛健太郎茂手木佑辅
Owner NITTO DENKO CORP
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