Claims
- 1. A process for producing a resilient, non-porous, significantly non-absorbent pressure-sensitive adhesive tape that consists essentially of impregnating a substrate of open-celled, high density, flexible, resilient polyurethane foam with a polychloroprene latex, compressing said latex-impregnated substrate to cause said latex to penetrate through said polyurethane foam and permitting said substrate to return to its pre-compressed state; depositing a layer of a pressure-sensitive adhesive upon said impregnated substrate, and curing each of said polychloroprene and pressure-sensitive adhesive simultaneously or in separate steps.
- 2. A method as claimed in claim 1, wherein said pressure-sensitive adhesive is an acrylic resin and is deposited upon a release tape and brought into contact with said impregnated substrate whereupon said adhesive is cured thereon.
- 3. A process as claimed in claim 2, wherein said impregnated substrate is compressed to within a range between one-third to two-thirds of its thickness immediately prior to compression.
- 4. A process as claimed in claim 3, wherein said compression is effected to about one-half of the thickness of said impregnated substrate in its pre-compressed state immediately prior to compression.
- 5. A process for producing a resilient, pressure-sensitive adhesive tape that consists essentially of impregnating an open-cell, flexible, polyurethane foam substrate, said foam, prior to impregnation, having a density of 20 pounds per cubic inch to 60 pounds per cubic inch and wherein the open-cell structure thereof as represented by absence of cell membranes is within the range of about 17 percent to about 100 percent, with a polychloroprene latex having a Brookfield viscosity of from 23 centipoises to 250 centipoises, compressing the polychloropreneimpregnated substrate so formed, and permitting said substrate to return to its immediately pre-compressed state; coating the resulting impregnated substrate with an acrylic resin adhesive; and curing said polychloroprene and adhesive thereon simultaneously or in separate steps.
- 6. A process as claimed in claim 5, wherein said foam, prior to impregnation, has a density of 40 pounds per cubic inch.
- 7. A process as claimed in claim 5, wherein said latex has a specific gravity of from 1.10 to 1.12 and a solids content by weight of 50 percent to 60 percent.
- 8. A process as claimed in claim 5, wherein said impregnated polychloroprene is initially cured; said coating of acrylic resin adhesive is deposited upon said impregnated substrate and said adhesive is thereupon cured.
- 9. A process as claimed in claim 5, wherein said pressuresensitive adhesive is an acrylic resin.
Parent Case Info
This application is a divisional of copending application Ser. No. 860,156 filed Dec. 14, 1977, U.S. Pat. No. 4,169,184; this latter application is a continuation-in-part of copending application Ser. No. 357,626 filed May 7, 1973, now abandoned, by the applicant herein.
US Referenced Citations (3)
Divisions (1)
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Number |
Date |
Country |
Parent |
860156 |
Dec 1977 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
357626 |
May 1973 |
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