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US 8,475,036 B2Granted
Timepiece face and timepiece
AssigneeSeiko Epson Corporation
InventorKoki Takasawa
Life of this patent
Estimating the term…
Abstract
To provide a timepiece face created by bonding a plurality of substrates configured primarily from polycarbonate, excellent bonding strength being achieved between substrates and air bubbles being effectively prevented from forming in the bond layer, and a timepiece including the timepiece face, a timepiece face according to the invention includes a first substrate configured primarily from polycarbonate; a second substrate configured primarily from polycarbonate; and a bond layer for bonding the first substrate and the second substrate.
Claims7
A timepiece face, comprising:
- a first substrate configured primarily from polycarbonate;
- a second substrate configured primarily from polycarbonate;
- and
- a bond layer for bonding the first substrate and the second substrate;
- wherein
- the bond layer is configured from an adhesive elastic body composition obtained by directing UV light on a UV-crosslinking acrylic resin material in an oxygen-blocked state so that crosslinking occurs, the UV-crosslinking acrylic resin material having as a main agent an acrylic acid monomer and/or oligomer;
- and the bond layer has a thickness of 50 μm to 200 μm, an elongation of 50% to 350%, and a light transmittance of 80% or higher in the thickness direction.
4 more elements
A timepiece face, comprising:
- a plurality of substrates configured primarily from polycarbonate;
- and
- bond layers for bonding the substrates that are adjacent;
- wherein
- the bond layers are configured from an adhesive elastic body composition obtained by directing UV light on a UV-crosslinking acrylic resin material in an oxygen-blocked state so that crosslinking occurs, the UV-crosslinking acrylic resin material having as a main agent an acrylic acid monomer and/or oligomer;
- and the bond layer have a thickness of 50 μm to 200 μm, an elongation of 50% to 350%, and a light transmittance of 80% or higher in the thickness direction.
3 more elements
Dependencies are inferred from the claim text.