Tectorial membrane forming device for forming tectorial membrane on internal surface of container, production method for internal surface tectorial membrane container

Abstract

A device for forming a coating film on the inner surface of a container comprising a plurality of film-forming chambers (21) communicating with a rotary vacuum sealing mechanism (1) through an exhaust pipe (11) to form a coating film on the inner surface of a plastic bottle B. The exhaust pipe is made of a conductive material and arranged, at a desired position in the pipe, with a honeycomb conductor (39), i.e. a breathing and conductive electric field shielding member. The film-forming chamber comprises an external electrode (27) having a cavity large enough to surround a container when it is inserted, a conductive chamber header member (32) fixed to the end face of the external electrode on the side where the mouth of the container is located through an insulating member (31) and being connected with the exhaust pipe and earthed, a member (34) being inserted into the container in the external electrode (27) from the chamber header member side and blowing coating film forming gas, and a high frequency power supply (35) as an electric field imparting means for imparting an electric field between the external electrode and the earthed chamber header member and exhaust pipe.

Description

Film forming apparatus for forming film on inner surface of container, and method of manufacturing inner surface film-coated container technical field The present invention relates to a coating forming device for coating the inner surface of a container and a method for manufacturing an inner surface coating container. Background technique Plastic containers, such as PET bottles, try to form a barrier film on the inner surface, such as DLC (Diamond Like Carbon, diamond-like carbon) and other carbons, in order to prevent oxygen from the outside and / or prevent carbon dioxide from the inside (such as carbonated drinks). film (Patent Document 1). As such a method of forming a carbon film on the inner wall surface of a plastic container, it is described in Patent Document 2 which the present applicant has applied for and published. In FIG. 7 of this patent document 2, a carbon film forming apparatus for forming a carbon film on the inner surface of a plastic container is disc...

AI Technical Summary

Problems solved by technology

However, in the carbon film forming apparatus having the above-mentioned structure, a plurality of film forming chambers having external electrodes and exhaust pipes are prepared, and the exhaust pipes (branch exhaust pipes) for these film forming chambers are respectively connected with the rotating exhaust pipes as exhaust means. When connected to the rotary vacuum sealing mechanism, there is a problem that the above-mentioned discharge area reaches the rotary vacuum sealing mechanism through the exhaust pipe

Furthermore, it may interfere with the discharge (plasma) of the above-mentioned rotary vacuum sealing mechanism that has reached other adjacent film forming chambers, resulting in unstable discharge and abnormal power supply.

In addition, when the discharge area extends to the exhaust pipe, the power injected into the PET bottle decreases, resulting in a decrease in power efficiency

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