Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

Felix P Lau

Dennis L Krueger

Patrick Darby Hyde

Pamela S Tucker

Roy Wong

Eumi Pyun

Gerald Steven Deeb

Robert H Menzies

Herbert W Morris

David James Yarusso

John A Martens

John G Chernega

Leslie M Milner

Eumi Pyum

Spencer F Silver

Richard J Kuo

Timothy D Bredahl

Donald M Yenni, Jr

Ronald W Seemann

Sankar B Narayan

Robert W Shipman

Takehiko Saito

George E Cox

Robert W G Shipman

A pressure-sensitive adhesive comprising a blend of at least two components, wherein the first component is at least one pressure-sensitive adhesive and second component is at least one thermoplastic material, wherein the components form a blended composition having more than one domain and, wherein one domain is substantially continuous (generally, the pressure-sensitive adhesive) and the other domain is substantially fibrillous to schistose (generally, the thermoplastic material). The second component can be (a) at least one thermoplastic elastomer, (b) at least one elastomer with a tackifying resin or (c) at least one elastomer.

Blended pressure-sensitive adhesives

A pressure-sensitive adhesive comprising a blend of at least two components, wherein the first component is at least one pressure-sensitive adhesive and the second component is at least one thermoplastic material, wherein the components form a blended composition having more than one domain and, wherein one domain is substantially continuous (generally, the pressure-sensitive adhesive) and the other domain is substantially fibrillous to schistose (generally, the thermoplastic material). The second component can be (a) at least one thermoplastic elastomer, (b) at least one elastomer with a tackifying resin or (c) at least one elastomer.

An adhesive tape is provided which comprises a woven cloth, a polymer embedded into the cloth so as to cause the warp and weft fibers of the cloth to bond together at their overlapping points but not to completely encase the fibers, and a pressure sensitive adhesive coated onto at least a portion of the polymer, wherein the adhesive tape is hand tearable in the down-web and in the cross-web direction. A method of manufacturing such a tape is also provided.

Adhesive tape and method of making

The invention provides a pressure-sensitive adhesive composition for medical applications comprising a blend of at least two components comprised of about 5 to about 95% by weight of a first component comprised of at least one acrylic pressure-sensitive adhesive and about 5 to about 95% by weight of a second component comprised of either (a) at least one elastomer with a tackifying resin, or (b) at least one thermoplastic elastomer, wherein the resulting pressure-sensitive adhesive demonstrates a T.sub.0 of at least 1 N/dm and a T.sub.48 of less than 12 N/dm when adhered to skin. The pressure-sensitive adhesive composition is prepared either in the presence of a solvent or is alternatively prepared by melt blending. A method of preparing such an adhesive is also disclosed.

Pressure-sensitive adhesive suitable for skin and method of preparing

The invention provides an adhesive composition suitable for use in an insulating tape having improved plasticizer resistance, comprising from about 13 to about 42 of a polyisoprene homopolymer, from about 13 to about 42 of a styrene-isoprene-styrene copolymer, from about 25 to about 55 of an aliphatic tackifying agent containing from about 4 to about 6 carbon atoms, and from about 2 to about 20 of an end block reinforcing resin.

Adhesive compositions with improved plasticizer resistance

A conformable electromagnetic radiation suppression cover comprising one or more absorbing material(s) and a sealant. The cover conforms to the shape of a reflecting structure due to forces internal to the absorbing material(s) when the cover is subjected to an agent external to the cover. The absorber comprises dissipative particles bound in a conformable polymeric binder. The sealant is positioned to seal the conformable cover to the reflecting structure, and provides environmental protection to the structure and preferably better adhesion between the cover and the structure. In a preferred embodiment, the volume of the cover is varied before shrinkage to produce a cover thickness in the direction of incident radiation, as measured after shrinkage, which produces a preselected resonant frequency for the cover. The cover may include a conductive surface, such as a metallic foil. Impedance matching materials are preferred but not required.

Electromagnetic radiation suppression cover

Stretched surface recording disk (SSR) 10 comprising an annular support 12 having raised annular ridges 28 and 42 at its inside and outside diameters 22 and 30 with a base portion 24 in between the two ridges, and an annular recording medium film 14 held in radial tension and stretched across the base portion by adhering the film to attachment surfaces 48 and 36 near the inside and outside diameters respectively. The bond between the recording medium film and the support at the inner and outer attachment surfaces is formed by an electron beam cured adhesive such as a mixture of hydantoin hexacrylate and dimethylacrylamide. By manufacturing the stretched surface recording disks with the e-beam process, significantly less time is required to adhere each stretched recording medium to its support, and the quality of the bond between the support and recording medium film is improved. SSR are capable of higher bit density than floppy disks of equivalent surface area and are not as sensitive to contact between the media and a flying magnetic head ('head crashes') as rigid disks.

Method for making stretched surface recording disk

A drive for a recording disk includes a drive motor and a head transport mounted on a chassis which has a coefficient of expansion equal to that of the disk to reduce tracking errors caused by differential expansion of the chassis and the disk due to environmental changes.

Recording and/or reproducing apparatus for controlling thermal expansion

Stretched surface recording disk (SSR) 10 comprising an annular support 12 having raised annular ridges 28 and 42 at its inside and outside diameters 22 and 30 with a base portion 24 in between the two ridges, and an annular recording medium film 14 held in radial tension and stretched across the base portion by adhering the film to attachment surfaces 48 and 36 near the inside and outside diameters respectively. The bond between the recording medium film and the support at the inner and outer attachment surfaces is formed by an electron beam cured adhesive such as a mixture of hydantoin hexacrylate and dimethylacrylamide. By manufacturing the stretched surface recording disks with the e-beam process, significantly less time is required to adhere each stretched recording medium to its suppport, and the quality of the bond between the support and recording medium film is improved. SSR are capable of higher bit density than floppy disks of equivalent surface area and are not as sensitive to contact between the media and a flying magnetic head ('head crashes') as rigid disks.

Stretched surface recording medium

Adhesive compositions comprising tackified star block copolymer having at least 12 block copolymer arms are provided. Sheet materials coated with the adhesive composition are also provided.

Growing community of inventors

Austin, TX, United States of America

Felix P Lau