Absorbent material for use in disposable articles and articles prepared therefrom

• US 6,376,034 B1
• Filed: 06/12/1998
• Issued: 04/23/2002
• Est. Priority Date: 01/23/1996
• Status: Expired due to Term

• Current Assignee: Maxwell Chase Technologies, LLC (AptarGroup Incorporated)
• Original Assignee: William M. Brander
• Inventors: Brander, William M.
• Primary Examiner(s): DYE, RENA
• Application Number:
  US09/096,788
• Time in Patent Office: 1,411 Days
• Field of Search: 426/124, 524/35, 524/47, 524/48, 252/194, 428/35.2, 428/35.3, 428/35.7, 428/36.92, 428/326, 428/327, 428/532
• US Class Current: 428/35.2
• CPC Class Codes: B65D 81/264 for absorbing liquids
• CPC Class Codes: Y10T 428/1334 Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/31971 Of carbohydrate

Abstract

An absorbent composition of matter includes a non-crosslinked gel forming polymer and at least one clay and preferably including a trivalent cation. The absorbency of the composition exceeds the sum of absorbencies of the components of the blend. The gel formed as a result of absorbency of fluid is non-slimy and has a high gel strength. The composition can be used with food products when made with all food safe ingredients. An absorbent article incorporating the absorbent material can be used for storage of food products.

Claims

1. A food safe absorbent composition of matter suitable for use with food products, said absorbent composition of matter having an absorbency, the absorbency being defined by weight of liquid absorbed/weight of said absorbent composition of matter, said absorbent composition of matter consisting essentially of:

a) at least one non-crosslinked gel-forming water soluble polymer having a first absorbency, said first absorbency being defined by weight of liquid absorbed/weight of said at least one non-crosslinked gel forming polymer, said at least one non-crosslinked gel forming polymer being food safe;

b) at least one mineral composition having a second absorbency, said second absorbency being defined by weight of liquid absorbed/weight of said at least one mineral composition, said at least one mineral composition being food safe; and

c) at least one soluble salt having at least one trivalent cation, said at least one soluble salt having at least one trivalent cation being food safe, the absorbency of said absorbent composition of matter exceeding a sum of said first absorbency and said second absorbency said absorbent composition of matter being compatible with food products such that said absorbent composition of matter is food safe when in direct contact with the food products.

2. The composition of claim 1, wherein said non-crosslinked gel-forming polymer is selected from the group consisting of carboxymethylcellulose and salts thereof, hydroxyethylcellulose, methylcellulose, hydroxypropylmethylcellulose, gelatinized starches, gelatin, and dextrose.

3. The composition of claim 1, wherein said non-crosslinked gel-forming polymer is the sodium salt of carboxymethylcellulose and is present at an amount of about 50 to 80% by weight.

4. The composition of claim 1, wherein said non-crosslinked gel-forming polymer is the sodium salt of carboxymethylcellulose and is present at an amount of about 70 to 75% by weight.

5. The composition of claim 1, wherein said at least one mineral composition is a clay selected from the group consisting of attapulgite, montmorillonite, bentonite, hectorite, sericite, and kaolin.

6. The composition of claim 1, wherein said at least one mineral composition is bentonite and is present at an amount of about 20 to 30% by weight.

7. The composition of claim 1, wherein said at least one soluble salt having at least one trivalent cation is potassium aluminum sulfate present at an amount of about 1 to 8% by weight.

8. The composition of claim 1, wherein said composition is formed into granules.

9. The composition of claim 8, wherein said granules have a size of about 250 to 600 μ

m.

10. An absorbent article comprising said absorbent composition of matter of claim 1.

11. A food safe absorbent composition of matter suitable for use with food products, said absorbent composition of matter having an absorbency, the absorbency being defined by weight of liquid absorbed/weight of said absorbent composition of matter, said absorbent composition of matter consisting essentially of:

a) at least one non-crosslinked gel-forming polymer having a first absorbency, said first absorbency being defined by weight of liquid absorbed/weight of said at least one non-crosslinked gel forming polymer, said at least one non-crosslinked gel forming polymer being food safe;

b) at least one mineral and diatomaceous earth composition having a second absorbency, said second absorbency being defined by weight of liquid absorbed/weight of said at least one mineral and diatomaceous earth composition, said at least one mineral and diatomaceous earth composition being food safe; and

c) at least one soluble salt having at least one trivalent cation, said at least one soluble salt having at least one trivalent cation being food safe, the absorbency of said absorbent composition of matter exceeding a sum of said first absorbency and said second absorbency, said absorbent composition of matter being compatible with food products such that said absorbent composition of matter is food safe when in direct contact with the food products.

12. The composition of claim 11, wherein said at least one mineral composition and said diatomaceous earth are present at an amount of about 20 to 30% by weight.

13. A food safe absorbent composition of matter suitable for use with food products, said absorbent composition of matter having an absorbency, the absorbency being defined by weight of liquid absorbed/weight of said absorbent composition of matter, said absorbent composition of matter consisting essentially of:

a) at least one non-crosslinked gel-forming polymer having a first absorbency, said first absorbency being defined by weight of liquid absorbed/weight of said at least one non-crosslinked gel forming polymer, said at least one non-crosslinked gel forming polymer being food safe;

b) at least one mineral composition having a second absorbency, said second absorbency being defined by weight of liquid absorbed/weight of said at least one mineral composition, said at least one mineral composition being food safe; and

c) at least one soluble salt having at least one trivalent cation, said at least one soluble salt having at least one trivalent cation being food safe;

d) at least one inorganic buffer, said inorganic buffer being food safe, the absorbency of said absorbent composition of matter exceeding a sum of said first absorbency and said second absorbency, said absorbent composition of matter being compatible with food products such that said absorbent composition of matter is food safe when in direct contact with the food products.

14. A food safe absorbent composition of matter suitable for use with food products, said absorbent composition of matter having an absorbency, the absorbency being defined by weight of liquid absorbed/weight of said absorbent composition of matter, said absorbent composition of matter consisting essentially of:

a) at least one non-crosslinked gel-forming polymer having a first absorbency, said first absorbency being defined by weight of liquid absorbed/weight of said at least one non-crosslinked gel forming polymer, said at least one non-crosslinked gel forming polymer being food safe;

b) at least one mineral and diatomaceous earth composition having a second absorbency, said second absorbency being defined by weight of liquid absorbed/weight of said at least one mineral and diatomaceous earth composition, said at least one mineral and diatomaceous earth composition being food safe;

c) at least one soluble salt having at least one trivalent cation, said at least one soluble salt having at least one trivalent cation being food safe; and

d) at least one inorganic buffer, said inorganic buffer being food safe, the absorbency of said absorbent composition of matter exceeding a sum of said first absorbency and said second absorbency, said absorbent composition of matter being compatible with food products such that said absorbent composition of matter is food safe when in direct contact with the food products.