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Method for manufacturing adhesive film

一种压敏粘合、压敏粘合剂的技术，应用在压敏薄膜/薄片、粘合剂类型、化学仪器和方法等方向，能够解决偏光板留下缺陷等问题

Active Publication Date: 2019-06-21
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In particular, when there are pits on the surface of the pressure-sensitive adhesive layer of the film, there is a risk that the pits of the film attached to the polarizing plate during the process are considered to be defects of the polarizing plate itself, so that processes such as interruption of the process occur. case, and there may be a risk that pits will leave defects in the polarizer when the film is removed

Method used

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  • Method for manufacturing adhesive film
  • Method for manufacturing adhesive film

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0048] Experimental Example 1: Evaluation of Pit Appearance

[0049] For the pressure-sensitive adhesive films prepared in Examples 1 to 6 and Comparative Examples 1 to 4 below, the number of occurrences of pits was measured by using a foreign matter tester. As a result of the measurement, X indicates a case where a pit having a diameter of 500 μm or more and a depth of 7 μm or more is produced; and A indicates a case where a pit having a diameter of 500 μm or less and a depth of 7 μm or less is not produced; B C denotes the case where 1 to 5 pits having a diameter of 500 μm or less and a depth of 7 μm or less are produced; C denotes a case where 6 to 10 pits having a diameter of 500 μm or less and a depth of 7 μm or less are produced; and D indicates a case where more than 10 pits having a diameter of 500 μm or less and a depth of 7 μm or less were generated. The results are shown in Table 2.

experiment example 2

[0050] Experimental Example 2: Evaluation of Color Index

[0051] For the pressure-sensitive adhesive films prepared in Examples 1 to 6 and Comparative Examples 1 to 4 below, the colorimetric index was measured using a colorimeter (COH-400). The results are shown in Table 2, the higher the median value, the higher the yellowness and the lower the transparency.

Embodiment 1

[0053] (1) Preparation of pressure-sensitive adhesive composition

[0054] 2-Ethylhexyl acrylate and 2-hydroxyethyl acrylate were copolymerized in a weight ratio of 95:5 to prepare an acrylic polymer solution having a solids concentration of about 40%. Ethyl acetate was used as solvent.

[0055] Then, with respect to 100 parts by weight of the solid content of the acrylic polymer solution, 5 parts by weight of an isocyanate compound (HDI trimer, product name: DR750HD), 7.5 parts by weight of a curing retarder (acetylacetone) and 0.05 parts by weight of An iron compound (iron(III) acetylacetonate) with ketone as a ligand was uniformly mixed to prepare a pressure-sensitive adhesive composition.

[0056] (2) Manufacture of pressure-sensitive adhesive film

[0057] The pressure-sensitive adhesive composition prepared above was bar-coated on one side of PET (poly(ethylene terephthalate), and dried at 120° C. for 1 minute. Following drying, a release film was laminated And cured ...

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PUM

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Abstract

The present application relates to a method for manufacturing an adhesive film. According to one embodiment of the present application, provided is a method for manufacturing an adhesive film, comprising the steps of: coating, on at least one surface of a substrate layer, an adhesive composition containing an isocyanate-based compound, a metal compound, and an acrylic polymer; and forming an adhesive layer by performing drying at a temperature of 100 DEG C or higher.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2016-0146413 filed on November 4, 2016 and Korean Patent Application No. 10-2017-0142311 filed on October 30, 2017, which The disclosure is incorporated herein by reference in its entirety. technical field [0003] The present application relates to a method for producing a pressure-sensitive adhesive film. Background technique [0004] A liquid crystal display (LCD) is a device for displaying images using liquid crystals, which has various advantages such as it consumes less power, and can be made with low power consumption, and can be made thinner in a plane, and is in each A display device that has attracted much attention in the field. [0005] A polarizing plate as an optical member applied to a liquid crystal display device or the like generally has a structure in which films such as triacetyl cellulose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J175/14C09J11/02C09J133/00
CPCC09J2203/318C08K5/0091C08K5/098C09J7/385C09J2301/408C08F220/1808C09J133/066C09J175/04C08G18/792C08G18/6229C08G2170/40C08F220/20C09J7/20C09J7/22C09J7/30C09J11/02C09J133/00C09J175/14C09J7/255C09J11/06C09J2433/00C09J2467/006B32B37/12B32B2037/1253
Inventor 李熙济朴柄洙权润京
Owner LG CHEM LTD