Cutting monofilament

• US 4,172,440 A
• Filed: 05/23/1978
• Issued: 10/30/1979
• Est. Priority Date: 03/27/1976
• Status: Expired due to Term

• Current Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Original Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Inventors: Schneider, Fritz, Bayersdorfer, Lothar
• Primary Examiner(s): Whitehead, Harold D.
• Application Number:
  US05/908,859
• Time in Patent Office: 525 Days
• Field of Search: 51/400, 51/295, 51/298, 125/18, 125/21
• US Class Current: 125/18
• CPC Class Codes: B23D 61/185 Saw wires; Saw cables; Twisted saw strips
• CPC Class Codes: B24D 5/12 Cut-off wheels

Abstract

Cutting filaments having a long service life consist of a monofilament of a synthetic polymer into which from 0.3 to 10 percent by weight of an abrasive are incorporated. In the cutting process the abrasive is not ripped off, as it does happen with steel wires bearing the abrasive on their surface, but it is pressed into the monofilament and can be easily recovered therefrom.

Claims

1. An elongated cutting filament for sawing hard materials consisting of a monofilament of a synthetic high molecular weight linear polyester and 0.3 to 10% by weight of incorporated abrasive, and the linear polyester having a specific viscosity above 0.7.

2. Cutting filament as claimed in claim 1, wherein the monofilament is made of pure or slightly modified polyethylene terephthalate.

3. Cutting filament as claimed in claim 1, wherein the abrasive is a carbide.

4. Cutting filament as claimed in claim 3, wherein the abrasive is boron carbide.

5. Cutting filament as claimed in claim 1, wherein the abrasive particles have a diameter corresponding to less than one half of the diameter of the monofilament.

6. Cutting filament as claimed in claim 5, wherein the diameter of the abrasive particles is from 0.1 to 0.4 times the diameter of the monofilament.

7. Cutting filament as claimed in claim 1, having a diameter of from 0.1 to 3 mm.