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US 12,686,795 B2Granted
Multilayer adhesive sheet, optical member comprising the same and display apparatus comprising the same
AssigneeSamsung SDI Co., Ltd.
InventorsDong Myeong Shin, Gwang Hwan Lee, Sung Hyun Mun, Il Jin Kim, Do Young Kim
Life of this patent
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Abstract
A multilayer adhesive sheet, an optical member including the same, and a display apparatus including the same are provided. A multilayer adhesive sheet includes: a base layer; a first adhesive layer stacked on a surface of the base layer; and a second adhesive layer stacked on another surface of the base layer, and the base layer includes a polyurethane-based film manufactured by solution casting and has a storage modulus of 700 MPa to 1,500 MPa at −20° C. and a storage modulus of 10 MPa to 100 MPa at 85° C.
Claims11
A multilayer adhesive sheet comprising:
- a base layer;
- a first adhesive layer stacked on a surface of the base layer;
- and a second adhesive layer stacked on another surface of the base layer,
- wherein the base layer comprises a polyurethane-based film manufactured by solution casting and has a storage modulus of 700 MPa to 1,500 MPa at −20° C. and a storage modulus of 10 MPa to 100 MPa at 85° C.,
- wherein the base layer has a thickness of 10 μm to 20 μm,
- wherein a laminate of the first adhesive layer, the base layer, and the second adhesive layer has a tensile modulus of 0.12 GPa to 0.2 GPa at 25° C.,
- wherein the first adhesive layer is formed of an adhesive composition comprising a monomer mixture for a hydroxyl group-containing (meth)acrylic copolymer;
- particles or a particle mixture comprising at least one selected from among organic particles and inorganic particles;
- and an initiator, and
- the second adhesive layer is formed of an adhesive composition comprising a monomer mixture for a hydroxyl group-containing (meth)acrylic copolymer;
- particles or a particle mixture comprising at least one selected from among organic particles and inorganic particles;
- and an initiator, and
- the first adhesive layer has a storage modulus of 10 kPa to 500 kPa at −20° C. and a storage modulus of 10 kPa to 100 kPa at 60° C., and the second adhesive layer has a storage modulus of 10 kPa to 500 kPa at −20° C. and a storage modulus of 10 kPa to 100 kPa at 60° C.
10 more elements
A multilayer adhesive sheet comprising:
- a base layer;
- a first adhesive layer stacked on a surface of the base layer;
- and a second adhesive layer stacked on another surface of the base layer,
- wherein the base layer comprises a polyurethane-based film manufactured by solution casting and has a storage modulus of 700 MPa to 1,500 MPa at −20° C. and a storage modulus of 10 MPa to 100 MPa at 85° C.,
- wherein the base layer has a thickness of 10 μm to 20 μm,
- wherein the base layer has a Young's modulus of 100 MPa to 500 MPa at 25° C.,
- wherein a laminate of the first adhesive layer, the base layer, and the second adhesive layer has a tensile modulus of 0.12 GPa to 0.2 GPa at 25° C.,
- wherein the first adhesive layer is formed of an adhesive composition comprising a monomer mixture for a hydroxyl group-containing (meth)acrylic copolymer;
- particles or a particle mixture comprising at least one selected from among organic particles and inorganic particles;
- and an initiator, and
- the second adhesive layer is formed of an adhesive composition comprising a monomer mixture for a hydroxyl group-containing (meth)acrylic copolymer;
- particles or a particle mixture comprising at least one selected from among organic particles and inorganic particles;
- and an initiator, and
- the first adhesive layer has a storage modulus of 10 kPa to 500 kPa at −20° C. and a storage modulus of 10 kPa to 100 kPa at 60° C., and the second adhesive layer has a storage modulus of 10 kPa to 500 kPa at −20° C. and a storage modulus of 10 kPa to 100 kPa at 60° C.
11 more elements
Dependencies are inferred from the claim text.