Adhesive film and method for producing the same
Assignee3M Innovative Properties Company
InventorHidetoshi Abe Date
Life of this patent
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Abstract
An adhesive film is disclosed which can achieve, at the same time, bubble escapability during adhering, permanent and high peel resistance, and good appearance of the film surface after being adhered. The adhesive film comprises a substrate film, a primer layer formed on said substrate film, and an upper layer which is formed on said primer layer and contains elastic microspheres and a first adhesive polymer, wherein said primer layer comprises a second adhesive polymer and has a compressive modulus of 1×106 to 1×107 dyn/cm2, and said elastic microspheres comprises a third adhesive polymer and has a volume average diameter of 10 to 300 μm.
Claims14
An adhesive film comprising:
- a substrate film;
- a primer layer formed on said substrate film wherein said primer layer has a thickness of 10-50 μm and said primer layer comprises a second adhesive polymer and said primer layer has a compressive modulus of 1×106 to 1×107 dyne/cm2;
- and
- an upper layer which is formed on said primer layer and contains tacky elastic microspheres and a first adhesive polymer,
- wherein said tacky elastic microspheres comprise a third adhesive polymer and have a volume average diameter of 10 to 300 μm,
- said tacky elastic microspheres forming convex shapes on said primer layer that allow air to escape between the adhesive film and an adherent.
Dependencies are inferred from the claim text.