Speaker member and method for manufacturing the same

1. A speaker member comprising:

a base material; and

a resin film layer laminated on the base material through an adhesive layer, wherein:

the adhesive layer has a heat shrinkage ratio of 0.5 to 1.0%;

the resin film layer has a heat shrinkage ratio of 0.8 to 1.3%; and

the heat shrinkage ratio of the adhesive layer is smaller than the heat shrinkage ratio of the resin film layer.

2. A speaker member according to claim 1 , wherein the resin film layer is formed of polycarbonate-based polyurethane.

3. A speaker member according to claim 2 , wherein the polycarbonate-based polyurethane has a molecular weight of 10,000 or more.

4. A speaker member according to claim 1 , wherein the resin film layer has a thickness of 1 to 40 μm.

5. A speaker member according to claim 1 , wherein the adhesive layer is formed of a polycarbonate-based polyurethane adhesive.

6. A speaker member according to claim 1 , wherein the adhesive layer has a thickness of 10 to 50 μm.

7. A speaker member according to claim 1 , wherein:

the adhesive layer comprises a first adhesive layer and a second adhesive layer in the order given from a side of the base material; the first adhesive layer has a heat shrinkage ratio of 0.5 to 0.9%;

the second adhesive layer has a heat shrinkage ratio of 0.6 to 1.0%;

the heat shrinkage ratio of the first adhesive layer is smaller than the heat shrinkage ratio of the second adhesive layer; and

the heat shrinkage ratio of the second adhesive layer is smaller than the heat shrinkage ratio of the resin film layer.

8. A speaker member according to claim 7 , wherein:

the first adhesive layer is formed of a polycarbonate-based polyurethane adhesive for dry lamination; and

the second adhesive layer is formed of a polycarbonate-based polyurethane adhesive for wet lamination.

9. A speaker member according to claim 8 , wherein the polycarbonate-based polyurethane adhesive for dry lamination contains polycarbonate-based polyurethane having a molecular weight of about 20,000 to 50,000.

10. A speaker member according to claim 8 , wherein the polycarbonate-based polyurethane adhesive for wet lamination contains polycarbonate-based polyurethane having a molecular weight of about 50,000 to 100,000.

11. A speaker member according to claim 7 , wherein the first adhesive layer has a thickness of 10 to 50 μm.

12. A speaker member according to claim 7 , wherein the second adhesive layer has a thickness of 10 to 50 μm.

13. A speaker member according to claim 11 , wherein the second adhesive layer has a thickness of 10 to 50 μm.

14. A speaker member according to claim 1 , wherein the base material is formed of one of a woven fabric and anon-woven fabric of one fiber selected from the group consisting of a natural fiber, a regenerated fiber, and a synthetic fiber.

15. A method of manufacturing a speaker member comprising:

applying a predetermined resin composition on a release material;

drying the resin composition, so as to form a resin film layer on the release material;

applying a predetermined adhesive on the resin film layer, so as to form an adhesive layer;

attaching together the resin film layer formed on the release material and a base material through the adhesive layer, so as to form a laminate;

subjecting the laminate to aging; and

molding the laminate subjected to aging by using a metal mold having a predetermined shape; wherein

the adhesive layer has a heat shrinkage ratio of 0.5 to 1.0%;

the resin film layer has a heat shrinkage ratio of 0.8 to 1.3%; and

the heat shrinkage ratio of the adhesive layer is smaller than the heat shrinkage ratio of the resin film layer.

16. A method of manufacturing a speaker member according to claim 15 , wherein the laminate is subjected to aging in a form of a roll.

17. A speaker comprising the speaker member according to claim 1 .