3m Innovative Properties Company

Gregory L Bluem

Michael F Weber

Carl A Stover

Timothy J Hebrink

Kristopher J Derks

Jeffery N Jackson

Robert D Taylor

Kevin M Hamer

Martin E Denker

Joan M Strobel

William B Black

Richard J Thompson

John P Purcell

Barry S Rosell

Shandon Dee Hart

Robert L Brott

Patrick R Fleming

William J Kopecky

Joan M Frankel

Anna A Kobilansky

Andrew John Ouderkirk

James M Jonza

Christopher A Haak

Bruce Brandon Wilson

Jingjing Ma

Margaret M Vogel-Martin

Zhong Chen

Huiwen Tai

Christopher J Rother

Daniel J Zillig

David C Kramlich

Lynn E Lorimor

Stanley F Tead

You Hoon Kim

Anna A Wetzels

Sarang V Deodhar

You-Hoon Kim

Peter J Klopp

Fred B McCormick, Jr

Karl A Stover

Provided are double-coated tapes that include, in the following order: a first pressure-sensitive adhesive layer; a first plastic skin layer; an elastic base layer; a second plastic skin layer; and a second pressure-sensitive adhesive layer. The provided double-coated adhesive tapes can provide a combination of high bond strength, reworkability, and high impact and shock resistance, and can be easily converted using a die cutting process.

Double coated tape

Optical bodies are disclosed that include a first optical film, a second optical film and at least one rough strippable boundary layer disposed between the first and second optical films. Also disclosed are optical bodies including a strippable boundary layer disposed between the first and second optical films and including a first polymer and a second polymer that is substantially immiscible in the first polymer. The present disclosure also provides methods of processing optical bodies that include stretching the optical bodies.

Optical bodies including rough strippable boundary layers

Optical bodies are disclosed that include an optical film and at least one rough strippable skin layer. The at least one rough strippable skin layer can include a continuous phase and a disperse phase. In some embodiments, the at least one rough strippable skin layer can include a first polymer, a second polymer different from the first polymer and an additional material that is substantially immiscible in at least one of the first and second polymers. In some exemplary embodiments, a surface of the at least one rough strippable skin layer adjacent to the optical film comprises a plurality of protrusions and the adjacent surface of the optical film comprises a plurality of asymmetric depressions substantially corresponding to said plurality of protrusions. Methods of making such exemplary optical bodies are also disclosed.

Optical bodies including rough strippable boundary layers and asymmetric surface structures

Polymer fibers are formed with concentric alternating layers of different polymer materials. The layers pairs have cross-sectional thicknesses selected for reflecting light at a selected visible wavelength. A cross-sectional dimension of the core is at least ten times an average of the selected thicknesses of the alternating layers. Some articles formed by the fibers are formed by attaching one fiber to another: the color of the fibers at the point of attachment is different from the colors of the fibers elsewhere. The fibers may be deformed to change its color properties by elongating the cross-section of the polymer fiber along a first cross-sectional axis. In some embodiments, the fibers are polarization sensitive.

Color shifting multilayer polymer fibers and security articles containing color shifting multilayer polymer fibers

A polarizing film is made of multilayer polarizing fibers embedded within a matrix. The fibers are formed with layers of at least a first and a second polymer material. Layers of the first polymer material are disposed between layers of the second polymer material. At least one of the first and second polymer materials is birefringent. In some embodiments the thickness of the layers of at least one of the materials varies across the fiber, and may include layers are selected as quarter-wavelength thickness for light having a wavelength of more than 700 nm.

Multilayer polarizing fibers and polarizers using same

A screen-printable adhesive composition capable of being applied to a substrate at room temperature comprising at least one alkyl acrylate; at least one reinforcing comonomer, a polyepoxide resin, and a polyepoxide resin curing agent; wherein said composition is substantially solvent free and said composition has a yield point of greater than 3 Pascals and a viscosity of less than 6000 centipoise. In another aspect, the invention provides heat-curable electrically and/or thermally conductive adhesive films that are substantially solvent-free acrylic polymers further containing a polyepoxide resin, a polyepoxide resin curing agent, and an electrically conductive material and/or a thermally conductive material.

Adhesive compositions and methods of use

Growing community of inventors

Saint Paul, MN, United States of America

Gregory L Bluem