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US 10,294,394 B2Granted
Pressure sensitive adhesive tape with microstructured elastomeric core
Assignee3M Innovative Properties Company
InventorsCarlos A. Barrios, Michael Benton Free, Jason D. Clapper, Robert M. Jennings
Life of this patent
Estimating the term…
Abstract
Multilayer adhesive tapes including at least one microstructured elastomeric layer and at least one layer of a pressure sensitive adhesive disposed on the microstructured elastomeric layer, and articles that include such multilayer adhesive tapes.
Claims12
A multilayer adhesive tape comprising:
- a core layer comprising an elastomeric material, the core layer having first and second major surfaces that are opposed, and microstructured to define a plurality of recesses on the first and second major surfaces of the core layer, each recess comprising a bottom, wherein the microstructured first and second major surfaces have structures that are periodic in two dimensions with nearest neighbor features spaced equally in two different directions along each of the first and second major surfaces, the structures comprising cylindrical or curved lens-shaped features, diffractive optical structures, pyramids, trapezoids, round or square shaped posts, photonic crystal structures, spherical or curved lenses, curved sided cone structures, cube corners, or combinations thereof;
- and
- first and second layers of pressure sensitive adhesive coated onto the microstructured first and second major surfaces of the core layer and at least partially filling the plurality of recesses, such that the pressure sensitive adhesive of the first and second layers has, associated with least one recess, a first thickness extending from the bottom of the recess to a minimum pressure sensitive adhesive surface level and a second thickness extending from a maximal structure surface level to a maximal pressure sensitive adhesive surface level, the first thickness being greater than the second thickness;
- wherein the first and second layers of pressure sensitive adhesive are adhesively coupled to the core layer.
1 more element
A multilayer adhesive tape comprising:
- a microstructured layer comprising an elastomeric material, the microstructured layer having opposed first and second major surfaces, wherein the first major surface is microstructured to define a plurality of recesses on the first major surface, each recess comprising a bottom, wherein the microstructured first major surface has structures that are periodic in two dimensions with nearest neighbor features spaced equally in two different directions along the first major surface, the structures comprising cylindrical or curved lens-shaped features, diffractive optical structures, pyramids, trapezoids, round or square shaped posts, photonic crystal structures, spherical or curved lenses, curved sided cone structures, cube corners, or combinations thereof;
- and
- a layer of pressure sensitive adhesive coated onto the microstructured first major surface of the microstructured layer and at least partially filling the plurality of recesses, such that the pressure sensitive adhesive has, associated with least one recess, a first thickness from the bottom of the recess to a minimum pressure sensitive adhesive surface level and a second thickness extending from a maximal structure surface level to a maximal pressure sensitive adhesive surface level, the first thickness being greater than the second thickness;
- wherein the layer of pressure sensitive adhesive is adhesively coupled to the microstructured layer.
1 more element
A multilayer adhesive tape comprising:
- a microstructured layer comprising an elastomeric material and a microstructured first major surface to define a plurality of recesses on the first major surface, each recess extending from a bottom of the recess to a maximal structure surface level, wherein the microstructured first major surface has structures that are periodic in two dimensions with nearest neighbor features spaced equally in two different directions along the first major surface, the structures comprising cylindrical or curved lens-shaped features, diffractive optical structures, pyramids, trapezoids, round or square shaped posts, photonic crystal structures, spherical or curved lenses, curved sided cone structures, cube corners, or combinations thereof;
- and
- a layer of pressure sensitive adhesive coated onto the microstructured first major surface and at least partially filling the plurality of recesses, the layer of pressure sensitive adhesive having a surface defining a minimum pressure sensitive adhesive surface level and a maximal pressure sensitive adhesive surface level, and the layer of pressure sensitive adhesive having a first thickness extending from the bottom of at least one recess to the minimum pressure sensitive adhesive surface level and a second thickness extending from the maximal structure surface level to the maximal pressure sensitive adhesive surface level, the first thickness being greater than the second thickness;
- wherein the layer of pressure sensitive adhesive is adhesively coupled to the microstructured layer.
1 more element
Dependencies are inferred from the claim text.