Browse Prior Art Database

Corona Discharge Treatment Process and Apparatus

IP.com Disclosure Number: IPCOM000086651D
Original Publication Date: 1976-Oct-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Saxemeyer, GJ: AUTHOR

Abstract

In certain applications, it is desirable to alter the surface of sheets of fluorocarbon resin by exposing them to corona discharge. The treated surface can then be wetted by liquids, such as adhesives and printing inks.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Corona Discharge Treatment Process and Apparatus

In certain applications, it is desirable to alter the surface of sheets of fluorocarbon resin by exposing them to corona discharge. The treated surface can then be wetted by liquids, such as adhesives and printing inks.

If one exposes a wide sheet of material to a corona discharge, the edge effects are not particularly important since the incompletely treated edges can be trimmed away. However, if the sheet being treated is narrow, edge effects are important.

Shown above is a corona discharge unit which minimizes the edge effects so that no edge trimming of the treated material is necessary. The device includes a toothed electrode 10, a ground electrode 12, and a ceramic insulator 14. The fluorocarbon sheet 16, which one desires to treat, is positioned between electrode 10 and insulator 14. A high-voltage square-wave generator 18 applies alternating current between electrodes 10 and 12.

All exposed corners and edges of electrode 10 are chamfered and vapor blasted. Notches are then cut in the bottom edges of each finger. Each notch is about 0.15 centimeters wide and 0.25 centimeters deep.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]