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Title:
TREATMENT OF PLASTICS CONTAINERS
Document Type and Number:
WIPO Patent Application WO2001089722
Kind Code:
A3
Abstract:
A treatment method for the internal surface of a moulded polyethylene plastics material container such as a drum, comprising the steps of: introducing an isonisable gas, such as argon, into the container; generating a plasma of the introduced gas by applying electric field of sufficient strength to the container and introduced gas, so as to cause an interaction with the internal surface of the container; coating the internal surface of the container with a curable epoxy-based first polymeric composition; and then curing the polymeric composition to form a coating on the internal surfaces of the container. A second coating, preferably with electrical conductive properties, may be applied and cured over the first coating. Conductive properties may be provided by including conductive particles such as antimony doped tin dioxide, graphite or metal powders, in the second composition.

Inventors:
CHRISTY MICHAEL DAVID
WALLIS PHILLIP ANDREW
AHMED QAMAR UDDIN
Application Number:
PCT/GB2001/002173
Publication Date:
March 21, 2002
Filing Date:
May 18, 2001
Export Citation:
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Assignee:
HARCOSTAR DRUMS LTD (GB)
International Classes:
B05D3/14; B05D7/00; B05D7/02; B05D7/22; B05D3/02; B05D3/06; (IPC1-7): B05D7/22; B05D3/06; B05D3/14; B05D7/00; B05D7/02
Domestic Patent References:
WO1995022413A11995-08-24
Foreign References:
EP0575798A11993-12-29
GB2219270A1989-12-06
GB2207368A1989-02-01
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