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Reinforced thin film, manufacturing method of device, and reinforced method

A manufacturing method and film technology, which is applied in the field of reinforced films, can solve problems such as difficult reprocessing, and achieve the effect of easy reprocessing and high adhesion

Active Publication Date: 2022-05-17
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, reinforced films that are premised on permanent adhesion are usually not supposed to be peeled off from the device, but are firmly bonded to the surface of the device, making reprocessing difficult

Method used

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  • Reinforced thin film, manufacturing method of device, and reinforced method
  • Reinforced thin film, manufacturing method of device, and reinforced method
  • Reinforced thin film, manufacturing method of device, and reinforced method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151]

[0152] 95 parts by weight of butyl acrylate (BA) as a monomer, 5 parts by weight of acrylic acid (AA), and azobisisocyanate as a thermal polymerization initiator were charged into a reaction vessel equipped with a thermometer, a stirrer, a reflux condenser, and a nitrogen gas introduction pipe. 0.2 parts by weight of butyronitrile (AIBN) and 233 parts by weight of ethyl acetate as a solvent were flowed into nitrogen gas, and nitrogen substitution was performed for about 1 hour while stirring. Then, it heated at 60 degreeC, it was made to react for 7 hours, and the solution of the acrylic polymer with a weight average molecular weight of 600,000 was obtained.

[0153]

[0154] Add 0.5 parts by weight of a tetrafunctional epoxy compound ("Tetrad C" manufactured by Mitsubishi Gas Chemical Company) as a crosslinking agent to a solution of an acrylic polymer, and a polyfunctional acrylic monomer manufactured by Shin-Nakamura Chemical Industry Co., Ltd. "NK ESTER A200" ...

Embodiment 2～6

[0158] In the preparation of the adhesive composition, in addition to the crosslinking agent, multifunctional acrylic monomer, and photopolymerization initiator, the types and amounts of organic compounds shown in Table 1 were added to the solution of the acrylic polymer. Metal crosslinking accelerator. Except adding an organometallic crosslinking accelerator, it carried out similarly to Example 1, and produced the reinforced film.

Embodiment 7

[0160] In Example 7, in the preparation of the adhesive composition, in addition to the crosslinking agent, the multifunctional acrylic monomer, and the photopolymerization initiator, a carboxyl group-containing acrylic low 1 part by weight of a polymer ("ARUFON UC-3000" manufactured by Toagosei Co., Ltd.; weight average molecular weight: 10,000, glass transition temperature: 65° C., acid value: 74 mgKOH / g). In Example 8, an organometallic crosslinking accelerator was further added. Except these changes, it carried out similarly to Example 1, and produced the reinforcement film.

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Abstract

Reinforced films, methods of manufacturing devices, and methods of reinforcement are provided. A reinforced film (10) includes a film base material and an adhesive layer (2) fixedly laminated on one main surface of the film base material. The adhesive layer contains a photocurable composition. The photocurable composition constituting the adhesive layer contains a base polymer, a photocuring agent, and a photopolymerization initiator. The base polymer is substantially free of nitrogen atoms. A crosslinked structure may be introduced into the base polymer.

Description

technical field [0001] The present invention relates to a reinforced film in which a film substrate and a photocurable adhesive layer are fixedly laminated. Furthermore, the present invention relates to a method for manufacturing a device having a reinforcing film stuck on its surface, and a reinforcing method for fixing and laminating a reinforcing film on the surface of an adherend. Background technique [0002] An adhesive film may be attached to the surface of an optical device such as a display or an electronic device for the purpose of protecting the surface, imparting impact resistance, or the like. Such an adhesive film usually has an adhesive layer fixedly laminated on the main surface of the film substrate, and is adhered to the surface of the device via the adhesive layer. [0003] Damage and breakage of the adherend can be suppressed by temporarily fixing the adhesive film on the surface of the device or device constituent members in a state before use such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/30C09J7/25C09J4/06C09J4/02
CPCC09J7/30C09J7/255C09J4/06C09J2467/006C09J2433/00C08J5/18C09J133/06C09J11/06C09J5/02C09J2301/416C09J2301/312C08K5/1515C08J7/0427
Inventor 片冈贤一仲野武史
Owner NITTO DENKO CORP