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Ultraviolet curable resin composition and peeling method of cured product thereof

A curing resin, ultraviolet technology, applied in non-polymer organic compound adhesives, nonlinear optics, instruments, etc., can solve the problems of scratches on the surface of the substrate, cost costs, and difficulty in recovering the substrate, and achieve good productivity. , the effect of less damage

Inactive Publication Date: 2016-10-19
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the process of removing the cured layer from the substrate with a brush tends to scratch the surface of the substrate, and it is very difficult to restore the substrate to the same state as before bonding.
[0006] In addition, in order to remove the cured product layer from the base material with a brush, a solvent is usually used, so not only does it require cost and environmental load, but it also becomes a process that cannot be automated by assembling it into a device with a conventional method. , there is a problem that requires a lot of time and personnel

Method used

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  • Ultraviolet curable resin composition and peeling method of cured product thereof
  • Ultraviolet curable resin composition and peeling method of cured product thereof
  • Ultraviolet curable resin composition and peeling method of cured product thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0044] figure 1 It is a figure showing the optical member to which the peeling method of the present invention can be applied, figure 2 It is a process diagram showing the first embodiment of the process of peeling the layer obtained by curing the ultraviolet curable resin composition of the present invention from the surface of the optical substrate.

[0045] First, the optical member to which the process of this invention can be suitably applied is demonstrated.

[0046] Such as figure 1As shown, the optical member has a configuration in which the same or different optical substrates are bonded to both surfaces of a cured resin layer made of an ultraviolet curable resin composition.

[0047] Various materials can be used as the optical substrate, and specifically, PET, PC, PMMA, a composite of PC and PMMA, glass, COC, COP, plastic (acrylic resin, etc.), polarizing plate, lens sheet, Prism sheet, ITO glass, etc.

[0048] In addition, as the optical substrate, in addition...

no. 2 approach

[0095] Figure 4 It is a process diagram showing the second embodiment of the process of peeling the layer 3 obtained by curing the ultraviolet curable resin composition of the present invention from the surface of the optical substrate.

[0096] It should be noted that the same reference numerals are assigned to the same constituent members as those in Embodiment 1 described above, and description thereof will not be repeated here.

[0097] (preparation)

[0098] First, if Figure 4 As shown in (a), the cured resin layer 3 is cut without contacting the surface of the optical substrate using a cutting member such as a wire 4 whose thickness is smaller than that of the cured resin layer 3 .

[0099] (Process 1)

[0100] Such as Figure 4 As shown in (b), the peeling substrate is brought into contact with the layer 3 obtained by curing the ultraviolet curable resin composition. Specifically, the resin film 7 is used as a peeling base material, and is in contact with the sur...

no. 3 approach

[0107] Figure 5 It is a process diagram of the third embodiment showing the process of peeling the layer 3 obtained by curing the ultraviolet curable resin composition of the present invention from the surface of the optical substrate.

[0108] It should be noted that the same reference numerals are assigned to the same constituent members as those in Embodiment 1 described above, and description thereof will not be repeated here.

[0109] (preparation)

[0110] First, if Figure 5 As shown in (a), a force is applied to the bonded optical base material in a direction opposite to the direction in which the cured material layer 3 is formed, and the resin obtained by semi-curing so as to have a cured portion and an uncured portion is cured. Layer 3 was peeled off and cut off.

[0111] (Process 1)

[0112] Such as Figure 5 As shown in (b), the peeling substrate is brought into contact with the layer 3 obtained by semi-curing the ultraviolet curable resin composition. Speci...

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Abstract

An object of the present invention is to provide an ultraviolet curable resin composition and a method for peeling a cured product thereof, which causes little damage to an optical base material from an optical member bonded using an ultraviolet curable resin, has good productivity, and can restore the optical base material to its original state. . An ultraviolet curable resin composition used in a method including the following (step 1) to (step 3) in which a layer obtained by curing the ultraviolet curable resin composition present on the surface of an optical substrate is peeled off, The ultraviolet curable resin composition contains a (meth)acrylate (A) and a photopolymerization initiator (B), and (step 1) a substrate for peeling is brought into contact with a layer obtained by curing the ultraviolet curable resin composition The step of (step 2) the step of attaching the layer obtained by curing the ultraviolet curable resin composition to the substrate for release, (step 3) the step of attaching the layer obtained by curing the ultraviolet curable resin composition A step of detaching the optical substrate from the layer obtained by curing the ultraviolet curable resin composition on the surface of the release substrate, collecting on the release substrate, and peeling from the optical substrate.

Description

technical field [0001] The present invention relates to a peeling method of an ultraviolet curable resin composition and its cured product, which is useful for peeling off a layer obtained by curing an ultraviolet curable resin composition present on the surface of an optical substrate. Background technique [0002] In recent years, a touch panel obtained by combining a display device such as a liquid crystal display, a plasma display, or an organic EL display with a position input device such as a touch panel has been widely used. This touch panel has a structure obtained by bonding a display device, a glass plate or a resin film on which a transparent electrode was formed, and a transparent protective plate made of glass or resin. [0003] There is a technology of using a double-sided adhesive sheet for lamination of a touch panel with a display device, a glass plate or film on which a transparent electrode is formed, and a transparent protective plate made of glass or res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F299/06C09J4/02C09J175/14G02F1/1333G09F9/00C08F290/06
CPCC08G18/755C08F290/067C08F299/065C08G18/4825C08G18/672C09J4/00
Inventor 小林大祐本桥隼松尾雄一朗
Owner NIPPON KAYAKU CO LTD
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