Patent · US Expired

Method for producing smooth surfaces on plastics

US5147724A · kind A · utility

6Cited by

5References

6Claims

0Family size

Assignee

MG Industries · US

Inventors

ManfredNeumann Eschwey · Düsseldorf, DE
Rolf van Bonn · Duisburg, DE
Horst Neumann · Ludwigshafen, DE

Key dates

Filing date	Oct 8, 1991
Grant date	Sep 15, 1992
Priority date	—
Expiry date	Oct 8, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31855
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Plastic objects are exposed to a gas mixture containing fluorine and a gaseous oxidizing agent, to produce an extremely smooth surface on the objects. The oxidizing agent can be oxygen, and the object is preferably exposed to the gaseous mixture for about 10-30 seconds. The surface of the object treated according to the present invention is found to be considerably more smooth and glossy than objects treated with fluorine alone, without the oxidizing agent. The surface formed according to the present invention therefore minimizes the contact area between the treated object and the surrounding media.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.