Patent · US Expired

Method for producing smooth surfaces on plastics

US5073231A · kind A · utility

10Cited by

5References

16Claims

0Family size

Assignee

MG Industries · US

Inventors

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

Key dates

Filing date	Sep 7, 1990
Grant date	Dec 17, 1991
Priority date	—
Expiry date	Sep 7, 2010

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2025/00
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.