DEGRADABLE POLYETHYLENE FILM

• US 3,833,401 A
• Filed: 11/16/1972
• Issued: 09/03/1974
• Est. Priority Date: 11/16/1972
• Status: Expired due to Term

• Current Assignee: Atlantic Richfield Company (BP PLC)
• Original Assignee: Alvin R. Ingram
• Inventors: Ingram, Alvin R.
• Primary Examiner(s): Guynn, Herbert B.
• Assistant Examiner(s): Hess, Bruce H.
• Application Number:
  US05/307,030
• Time in Patent Office: 656 Days
• Field of Search: 117/38,138.8E,12,14 47/9,DIG.7
• US Class Current: 427/256
• CPC Class Codes: A01G 13/0275 Films
• CPC Class Codes: B41M 1/30 on organic plastics, horn or similar materials recording sheets having a coating to improve ink, dye or pigment receptivity B41M5/50; marking or recording on plastic by irradiation with electromagnetic beams, e.g. laser, B41M5/267
• CPC Class Codes: C08K 5/0033 Additives activating the degradation of the macromolecular compound
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: G03F 7/039 Macromolecular compounds which are photodegradable, e.g. positive electron resists G03F7/075 takes precedence; macromolecular quinonediazides G03F7/023
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture

Abstract

Polyethylene film is caused to degrade in a predetermined pattern by the printing of the pattern on the surface of the film using printing ink containing a degradation promoter such as ultraviolet sensitizers, oxidation promoters, or embrittling agents.

Claims

2. The process of claim 1 wherein the degradation promoter is printed in a continuous coating whereby the entire film is degraded uniformly.

3. The process of claim 1 wherein the degradation promoter is printed in a discontinuous pattern whereby the printed portions of the film are degraded more rapidly than the unprinted portions.