Double-sided adhesive tape
AssigneeDexerials Corporation
InventorNoboru Araki
Life of this patent
Estimating the term…
Abstract
Disclosed is a double-sided adhesive tape that has a difference in adhesion between the front and rear sides thereof and can be produced to have a reduced thickness by a simple method. The double-sided adhesive tape is a sheet-shaped cured product of an adhesive composition containing a resin composition and an inorganic filler. The resin composition contains (A) an acrylate-based monomer, (B) a monomer copolymerizable with (A), (C) a photopolymerization initiator, and (D) a photo-crosslinking agent. The inorganic filler has an average particle diameter of 30 μm or less and is localized on one side of the tape. The surface roughness (center line average roughness Ra) of the tape surface on the side on which the inorganic filler is localized is 0.01 to 0.50 μm.
Claims13
A method of producing a double-sided adhesive tape, the method comprising:
- applying an adhesive composition containing:
- an inorganic filler having an average particle diameter of 5 to 30 μm;
- and
- a resin composition containing the following components (A) to (D):
- (A) an acrylate-based monomer,
- (B) a monomer copolymerizable with (A),
- (C) a photopolymerization initiator, and
- (D) a photo-crosslinking agent,
- to a release sheet having a surface roughness of 0.01 to 0.50 μm in terms of a center line average roughness Ra;
- and
- photo-curing the adhesive composition to form an adhesive layer having a surface in contact with the release sheet and an opposite surface, wherein
- no inorganic filler is present on the opposite surface of the adhesive layer,
- the opposite surface of the adhesive layer is formed flat, and
- the inorganic filler is localized on one side of the adhesive layer.
Dependencies are inferred from the claim text.