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Device for treating a container with microwave plasma

A low-pressure plasma and container technology, which is applied to liquid spray devices, devices for coating liquid on surfaces, spray devices, etc., can solve problems such as poor uniformity of the deposited layer.

Inactive Publication Date: 2002-05-15
SIDEL ACTIS SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Of course, poor uniformity of the deposited layer is naturally unsatisfactory

Method used

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  • Device for treating a container with microwave plasma
  • Device for treating a container with microwave plasma

Examples

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Embodiment Construction

[0025] The only device shown schematically in the drawing is the processing device 10 designed according to the invention. It is used in particular to carry out a method for depositing a covering layer on the inner surface of a container of thermoplastic material with a low-pressure plasma.

[0026] For example, the container may be a bottle of polyethylene terephthalate (PET) material and the covering layer to be formed may consist of a carbon-based material. Advantageously, however, the invention is applicable to other containers and other types of coverings, such as silica or alumina based coverings. In fact, all these covering layers are particularly beneficial because they greatly reduce the permeability of PET bottles to gases such as oxygen or carbon dioxide.

[0027] The treatment device 10 is used to process one bottle at a time. However, the unit is preferably integrated with a rotary machine having a series of identical units to be able to process a large number o...

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Abstract

The invention concerns a device for treating with the surface of a container, characterised in that the container is placed in a chamber (12) made of a conductive material and is rotationally symmetrical, and the device comprises a wave guide tunnel (15) substantially perpendicular to the axis (A1) of the chamber and which emerges therein in the form of a rectangular window whereof the smaller dimension corresponds to its dimension along the chamber axis, and the internal diameter of the chamber (12) is such that the microwaves are propagated in the chamber mainly according to a mode whereby the electric field resulting from the propagation of the microwaves exhibit an axial rotational symmetry.

Description

technical field [0001] The present invention relates to the field of methods for the surface treatment of containers, such as containers of thermoplastic material. [0002] The invention can be applied, for example, in the field of depositing thin barrier layers on bottles or cans of thermoplastic material such as polyethylene terephthalate. Background technique [0003] In fact, efforts are currently being made to improve the barrier properties of these containers, in particular to reduce their air permeability or to increase their opacity to certain rays, especially ultraviolet rays, in order to prolong the shelf life of the products packed in these containers. [0004] To this end, various methods have been proposed, which either directly change the material of the container, at least superficially, or further coat the container with a layer of organic or inorganic material in order to improve the performance of the container. A particularly advantageous method of carryi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/511B05B7/14B05C7/02C08J7/04C23C16/04C23C16/50H01J37/32
CPCC08J2367/02C08J7/123C23C16/04
Inventor 帕特里克·肖莱
Owner SIDEL ACTIS SERVICES
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