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Water vapor barrier film and method for producing same

一种水蒸气阻隔、制造方法的技术，应用在化学仪器和方法、电气元件、硅化合物等方向，能够解决达不到实用化等问题

Active Publication Date: 2013-02-20
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of electronic devices such as displays such as solar cells and fuel cells, the modified clay film requires further gas barrier properties and water vapor barrier properties, flexibility and mechanical strength, high heat resistance, water resistance, Weather resistance, the actual situation is not practical

Method used

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  • Water vapor barrier film and method for producing same
  • Water vapor barrier film and method for producing same
  • Water vapor barrier film and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] (1) Preparation of lithium-exchanged clay

[0088] Natural purified bentonite (manufactured by Kunipia F Kunimine Industry Co., Ltd.) was fully dried in an oven at a temperature of 110° C. or higher. 300 g of this bentonite was put into a ball mill barrel together with alumina balls. Next, 6 g of a silanizing agent (Syraace S330 manufactured by Chicso Corporation) was added thereto, and the inside of the cylinder was replaced with nitrogen gas, and ball milling was performed for 1 hour to obtain a silanized clay. As a silylating agent, what has an amino group at the terminal is used.

[0089] 24 g of silanized clay was added to 400 mL of a 0.5 N lithium nitrate aqueous solution, and mixed and dispersed by shaking. Vibration dispersion was performed for 2 hours to exchange the interlayer ions of the clay to lithium ions. Next, solid-liquid separation was performed on the dispersion liquid by centrifugation, and the obtained solid was washed with a mixed solution of 28...

Embodiment 2

[0104] In this example, the water vapor permeability of the water vapor barrier film was measured using a humidity sensor (manufactured by Lyssy Co., Ltd., trade name: L80-5000 type) for the PET / clay film prepared in Example 1 above. Will use 50cm 2 The atmosphere on the lower side of the space partitioned by the sample film was adjusted to a relative humidity of 100%, and the atmosphere on the upper side was adjusted to a relative humidity of 9.9% or less. Then, by the water vapor permeating the clay film, the time for the relative humidity of the atmosphere on the upper side of the sample film to change from 9.9% to 10.1% is calculated for the water vapor transmission rate (g / m 2 day). The results are shown in Table 2.

[0105] [Table 2]

[0106] Water vapor permeability of products heated at 140°C (g / m 2 day) (humidity sensor)

[0107]

[0108] In the water vapor barrier film that was heat-treated at 140°C for 40 hrs, the method of placing the film was switched from...

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Abstract

Disclosed are: a film for a solar cell back sheet, which has excellent water vapor barrier properties, water resistance and gas barrier properties, while having adequate flexibility, adequate mechanical strength and excellent thermal stability; and a method for producing the film for a solar cell back sheet. Specifically disclosed is a water vapor barrier film which is obtained by coating a PET base with a clay film. The water vapor barrier film is characterized in that: the clay film is configured of clay and an additive; the weight ratio of the clay relative to the total solid is 60-90% by weight in the clay film; the production procedure thereof comprises a water resistance-imparting heat treatment that is carried out at 100-200 DEG C after coating and drying steps; the water vapor barrier film has a water vapor transmission rate of less than 3 g / m2 / day; the additive of the modified clay is a polyimide; and 90% by mole or more of the exchangeable ions are lithium ions. Also specifically disclosed is a method for producing the water vapor barrier film. The film has water vapor barrier properties and is useful as a back sheet for a solar cell or the like.

Description

technical field [0001] The present invention relates to a back sheet used for disposing on the back side of a solar cell module. More specifically, it relates to a PET (polyethylene terephthalate) base material coated with clay, which has water vapor barrier properties, A film for a solar battery back sheet excellent in gas barrier properties, mechanical strength, and heat resistance, and excellent in productivity and quality, and a method for producing the same. [0002] The present invention provides new technologies and products related to a new water vapor barrier film which is excellent in weather resistance and satisfies all of water vapor barrier properties, gas barrier properties, flexibility, heat resistance, electrical Insulation and water resistance are required. Compared with the conventional clay film, it has the advantage of being easy to handle and can be continuously produced by the roll-to-roll method. It can be used preferably as a substrate film for LCD, for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00C01B33/40H01L31/042
CPCH01L31/0487C09D179/08H01L31/18C08J7/04Y02E10/50C08J2367/02C08J2479/08H01L31/049B05D3/0254C08K3/346B05D3/0209C08K2201/008B05D2201/02
Inventor 蛯名武雄岩田伸一手岛畅彦
Owner NAT INST OF ADVANCED IND SCI & TECH
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