Composite barrier films and method

A technology of barrier film and composite film, which is applied in the field of composite barrier film and can solve the problems of high cost and opacity

Inactive Publication Date: 2006-03-08
STREAMING SALES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, opaque, metallized plastic films have been used, and although these films are relatively inexpensive, they are opaque
As an alternative, transparent SiOx-coated plastic films can sometimes be applied, however, the cost of SiOx-coated plastic films is often prohibitive for many commercial applications

Method used

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Examples

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Embodiment Construction

[0007] The term "transparent", when referring to one or more layers of a coating layer of a composite film, means that any visible substance underlying the layers can be seen through the layers. The barrier films of the present invention have a visible light transmittance of at least 75%, as measured using a UV / Vis spectrophotometer (UV / VIS).

[0008] The term "clear", when referring to one or more layers, with respect to the composite films of the present invention, means that the clarity of the layers of the composite film is at least about 95%, and the haze of the layers of the composite film is less than about 10%. Clarity is measured according to TAPPI test T425os, and haze is measured according to ASTM Test Method D-1003.

[0009] In one embodiment, the present invention is directed to a method of making a composite barrier film comprising, in an atmosphere containing at least about 75% by volume nitrogen, by sputtering a silicon target, A silicon nitride-based coating...

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Abstract

In one embodiment, the invention relates to composite films having barrier properties, and more particularly, to composite films which comprise a silicon nitride based coating on a flexible plastic substrate wherein the silicon nitride based coating has a thickness of less than about 220 nm and is deposited on the plastic substrate by sputtering of a silicon target in an atmosphere comprising at least 75% by volume of nitrogen. The composite barrier film has a visible light transmittance of at least about 75%. In another embodiment, the invention relates to a barrier method of depositing a silicon nitride based coating on a plastic substrate to form a composite barrier film which comprises depositing a silicon nitride based coating on the substrate by sputtering of a silicon target in an atmosphere comprising at least about 75% by volume nitrogen.

Description

technical field [0001] The present invention relates generally to composite barrier films containing silicon nitride based coatings; more particularly, to such composite films having improved barrier and optical properties. Background technique [0002] Many different kinds of products and equipment are environmentally sensitive. More specifically, there are many different devices and products that are sensitive to gases and liquids that can cause the product or device to deteriorate and, ultimately, render the product or device useless. Such products include food, pharmaceuticals, health and beauty aids, electronic equipment, medical equipment, and display devices. Barrier coatings have been included in the packaging of such products to protect the product from gases and liquids in the environment, such as oxygen and water vapor in the atmosphere, or from the processing, handling, and storage of the product. and damage from chemicals in use. Many packaging uses, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02B32B9/00C04B35/00B32B1/00C08J7/043C08J7/046C08J7/048C23C14/00C23C14/06C23C14/32
CPCC23C14/0652C08J7/06C23C14/0036Y10T428/31547Y10T428/31786Y10T428/26C08J7/048C08J2367/02C08J2365/00C23C14/542C23C14/35C23C14/562
Inventor X-M·何R·埃达尔保尔A·R·梅尔阿比J·R·阿克哈韦
Owner STREAMING SALES
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