SOLUBLE COATED PAPER

• US 3,859,125 A
• Filed: 10/10/1972
• Issued: 01/07/1975
• Est. Priority Date: 10/10/1972
• Status: Expired due to Term

• Current Assignee: Albert R. Miller, Jacob Spiegel
• Original Assignee: Albert R. Miller, Jacob Spiegel
• Inventors: Spiegel, Jacob, Miller, Albert R.
• Primary Examiner(s): Lusignan, Michael R.
• Application Number:
  US05/296,435
• Time in Patent Office: 819 Days
• Field of Search: 117/111F,111H,155UA,161UE 128/287,29R 162/135,146,184 4/112 229/3.5
• US Class Current: 428/511
• CPC Class Codes: B65D 65/42 Applications of coated or impregnated materials
• CPC Class Codes: D21H 19/12 applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/1307 Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
• CPC Class Codes: Y10T 428/24149 Honeycomb-like
• CPC Class Codes: Y10T 428/31895 Paper or wood

Abstract

A soluble paper having a coating of polyvinyl alcohol. The soluble paper comprises carboxy methyl cellulose, and the sodium or potassium salts of carboxy methyl cellulose. The coated paper is soluble in either high or low temperature water.

Claims

1. A WATER SOLUBLE SHEET MATERIAL COMPRISING A WATER SOLUBLE PAPER HAVING A FILM OF POLYVINYL ALCOHOL COATED THEREON, SAID FILM BEING IMPREGNATED INTO THE INTERSTICES OF SAID PAPER, SAID FILM BEING INSOLUBLE IN WATER WHICH IS AT A TEMPERATURE BELOW APPROXIMATELY 138*F, BUT BEING SOLUBLE IN WATER ABOVE APPROXIMATELY 138*F, AND SAID WATER SOLUBLE PAPER COMPRISING

2. The sheet material of claim 1 wherein said polyvinyl alcohol is plasticized with a plasticizer selected from the group consisting of glycerine, ethylene glycol and sorbitol.

3. The sheet material of claim 2 wherein said plasticizer is present in the range of 2 to 7 per cent, by weight, of polyvinyl alcohol.

4. The sheet material of claim 2 wherein said plasticizer is present in the range of 3 to 5 per cent, by weight, of polyvinyl alcohol.