KR-102964139-B1 - Gas barrier laminate

Abstract

A gas barrier laminate having high elongation at break and excellent gas barrier properties, comprising a process film, a base layer, and a gas barrier layer in this order, wherein the base layer is a layer formed of a curable resin composition containing a polymer component (A) and a curable component (B), and the gas barrier laminate satisfies the following requirements [1] and [2]. [1] The absolute value of the thermal shrinkage rate of the gas barrier laminate is 0.5% or less. [2] The elongation at break of the gas barrier laminate is 1.9% or more.

Inventors

• 기노시타 히로키
• 나가나와 사토시

Assignees

• 린텍 가부시키가이샤

Dates

Publication Date

20260512

Application Date

20191225

Priority Date

20181227

Claims (6)

1. A gas barrier laminate comprising a process film, a base layer, and a gas barrier layer in this order, The above-mentioned underlayer is a layer composed of a cured product of a curable resin composition containing a polymer component (A) and a curable component (B), and The above gas barrier layer is a coating, and The above gas barrier laminate satisfies the following requirements [1] and [2]. [1] The absolute value of the thermal shrinkage rate of the gas barrier laminate after peeling off the above process film is 0.5% or less. [2] The fracture elongation of the gas barrier laminate after peeling off the above process film is 1.9% or more.
2. In Article 1, A gas barrier laminate having a thickness of 0.1 to 10 μm of the lower layer.
3. In Article 1 or Article 2, The above-mentioned curable component (B) is a gas barrier laminate containing a cyclizable polymerizable monomer.
4. In Paragraph 3, The above-mentioned curable component (B) further contains a polyfunctional (meth)acrylate compound, and the mass ratio of the cyclizable polymerizable monomer to the polyfunctional (meth)acrylate compound is 95:5 to 30:70, a gas barrier laminate.
5. In Article 1 or Article 2, A gas barrier laminate having a glass transition temperature of the above polymer component (A) of 250°C or higher.
6. delete

Description

Gas barrier laminate The present invention relates to a gas barrier laminate that is preferably used as a component for electronic devices such as liquid crystal displays or electroluminescence (EL) displays. For displays such as liquid crystal displays and electroluminescence (EL) displays, the use of transparent plastic films instead of glass plates is being considered to achieve thinness, lightness, and flexibility. However, since plastic films generally allow water vapor and oxygen to pass through more easily than glass plates, there was a problem where using a transparent plastic film as a display substrate caused water vapor or oxygen to pass through the substrate and affect the components inside the display device, thereby degrading the device's performance or shortening its lifespan. To solve this problem, it has been proposed to use a film having properties that inhibit the permeation of water vapor or oxygen as a substrate for a display. Hereinafter, the property of inhibiting the permeation of water vapor or oxygen is referred to as "gas barrier properties," a film having gas barrier properties is referred to as a "gas barrier film," and a laminate having gas barrier properties is referred to as a "gas barrier laminate." Recently, as there is a demand for higher performance displays, gas barrier films used as components for electronic devices are also required to have excellent properties such as heat resistance, solvent resistance, excellent interlayer adhesion, low birefringence, and excellent optical isotropy, in addition to excellent gas barrier properties. For example, Patent Document 1 proposes a gas barrier film having a gas barrier layer on one side of a cured resin layer, wherein the cured resin layer is a layer composed of a cured product of a curable resin composition containing a thermoplastic resin having a glass transition temperature of 140°C or higher and a curable monomer. FIG. 1 is a schematic cross-sectional view showing the configuration of a gas barrier laminate related to an embodiment of the present invention. Figure 2 is a process diagram showing an example of a method for manufacturing a gas barrier laminate. In this specification, the provisions deemed desirable may be selected at will, and combinations of the provisions deemed desirable may be said to be more desirable. In this specification, the description “XX ~ YY” means “XX or more and YY or less.” In the present specification, regarding a preferred numerical range (e.g., a range of content, etc.), the lower limit and the upper limit described stepwise can each be combined independently. For example, from the description “preferably 10 to 90, more preferably 30 to 60,” the “preferably lower limit (10)” and the “more preferably upper limit (60)” may be combined to form “10 to 60.” In this specification, for example, “(meth)acrylic acid” refers to both “acrylic acid” and “methacrylic acid,” and other similar terms are used. Hereinafter, a gas barrier laminate related to an embodiment of the present invention will be described. 1. Gas barrier laminate A gas barrier laminate related to an embodiment of the present invention comprises a process film, a base layer, and a gas barrier layer in this order. The base layer is a layer formed from a cured product of a curable resin composition containing a polymer component (A) and a curable component (B), and the gas barrier laminate satisfies the following requirements [1] and [2]. [1] The absolute value of the thermal shrinkage rate of the gas barrier laminate is 0.5% or less. [2] The elongation at break of the gas barrier laminate is 1.9% or more. In the gas barrier laminate related to the embodiment of the present invention, the underlayer is made of a curable resin composition, so that the underlayer has excellent solvent resistance. For this reason, for example, when the gas barrier layer is formed as a coating film, the underlayer becomes difficult to erode by the solvent during coating. As a result, it is difficult to reduce the gas barrier properties of the gas barrier laminate. Furthermore, a coating film is a film obtained by applying a coating material onto a substrate or object and, if necessary, performing a treatment such as curing by drying or heating. When the gas barrier layer is formed as a coating film, it is a film obtained by applying a coating material containing the component forming the gas barrier layer described later onto the underlayer and performing a treatment such as curing by drying or heating. Also, when the underlayer is formed as a coating film, it is a film obtained by applying a curable resin composition to a substrate such as a process film and performing only or both of the curing treatments such as drying, heating, or irradiation with active energy rays. In addition, by satisfying the above requirements [1], shrinkage of the gas barrier laminate during heating is suppressed. For this reason, when a gas barrier layer is formed on a base l