Desiccant deposit

• US 6,103,141 A
• Filed: 07/31/1998
• Issued: 08/15/2000
• Est. Priority Date: 01/23/1997
• Status: Expired due to Term

• Current Assignee: Bridgestone Corporation, Multisorb Technologies Incorporated (FGI Equity LLC)
• Original Assignee: Multisorb Technologies Incorporated (FGI Equity LLC)
• Inventors: McKedy, George E., Incorvia, Samuel A.
• Primary Examiner(s): ALEXANDER, LYLE
• Application Number:
  US09/127,305
• Time in Patent Office: 746 Days
• Field of Search: 428/355, 428/343, 428/351, 252/194, 156/331.7, 156/331.4, 524/35
• US Class Current: 252/194
• CPC Class Codes: B01D 53/261 by adsorption
• CPC Class Codes: B01D 53/28 Selection of materials for use as drying agents
• CPC Class Codes: B01L 2300/105 using desiccants
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: Y10T 428/2835 including moisture or waterproof component

Abstract

An adhesive desiccant deposit comprising a hot melt adhesive and a desiccant dispersed within the hot melt adhesive. The hot melt adhesive has sufficient porosity to allow water molecules to pass into the hot melt adhesive and contact the desiccant. The hot melt adhesive may optionally contain an additive to increase the porosity of the hot melt adhesive. One particular application of the deposit involves an adhesive desiccant tape comprising a substrate, a first adhesive layer disposed on the bottom of the substrate, a removable liner disposed on the first adhesive layer on the side of the first adhesive layer away from the substrate, and an adhesive desiccant deposit disposed on the top of the substrate.

Claims

1. An adhesive desiccant deposit comprising:

a hot melt adhesive;

a desiccant dispersed within said hot melt adhesive, said desiccant selected from the group consisting of silica, calcium oxides, activated carbon, molecular sieves, and combinations thereof; and

a cellulose additive to increase the porosity of said hot melt adhesive;

said hot melt adhesive having sufficient porosity to allow water molecules to pass into said hot melt adhesive and contact said desiccant.

2. The desiccant deposit of claim 1 wherein said hot melt adhesive is selected from the group consisting of vinyl acetate, ethyl vinyl acetate, polyurethane, and combinations thereof.

3. The desiccant deposit of claim 1 wherein said desiccant is selected from the group consisting of silica gel, calcium oxide, molecular sieves, activated carbon, and combinations thereof.

4. The desiccant deposit of claim 1 wherein said desiccant is an indicating desiccant.

5. The desiccant deposit of claim 1 wherein said desiccant is a non-indicating desiccant.

6. The desiccant deposit of claim 1 wherein said desiccant is a reversible desiccant.

7. The desiccant deposit of claim 1 wherein said desiccant is an irreversible desiccant.

8. The desiccant deposit of claim 1 wherein said desiccant is a silica gel.

9. An adhesive desiccant tape comprising:

a substrate with a top and a bottom;

a first adhesive layer disposed on said bottom of said substrate;

a removable liner disposed on said first adhesive layer on the side of said first adhesive layer away from said substrate; and

an adhesive desiccant deposit disposed on said top of said substrate, said adhesive desiccant deposit comprising a hot melt adhesive which has both a desiccant and a cellulose additive to increase the porosity of said hot melt adhesive dispersed within said hot melt adhesive, said desiccant selected from the group consisting of silica, calcium oxides, activated carbon, molecular sieves, and combinations thereof; and

said hot melt adhesive having sufficient porosity to allow water molecules to pass into said hot melt adhesive and contact said desiccant.

10. The desiccant tape of claim 9 wherein said hot melt adhesive is selected from the group consisting of vinyl acetate, ethyl vinyl acetate, polyurethane, and combinations thereof.

11. The desiccant tape of claim 9 wherein said desiccant is selected from the group consisting of silica gel, calcium oxide, molecular sieves, activated carbon, and combinations thereof.

12. The desiccant tape of claim 9 wherein said desiccant is an indicating desiccant.

13. The desiccant tape of claim 9 wherein said desiccant is a non-indicating desiccant.

14. The desiccant tape of claim 9 wherein said desiccant is a reversible desiccant.

15. The desiccant tape of claim 9 wherein said desiccant is an irreversible desiccant.

16. The desiccant tape of claim 9 wherein said desiccant is a silica gel.