Waterproof sound-transmitting sheet
A waterproof sound-transmitting sheet, which forms a reinforcement member on a waterproof sound-transmitting layer, thus maintaining waterproof performance and sound-transmitting performance by minimizing the displacement amount while maintaining stretch-shrinkage performance at a water pressure of about 1 atm or more. The waterproof sound-transmitting sheet may be configured to include a waterproof sound-transmitting layer formed in a film shape having elasticity, a first adhesive layer adhered to one surface of the waterproof sound-transmitting layer, a second adhesive layer adhered to the other surface of the waterproof sound-transmitting layer, and a reinforcement member formed of a hardening material to be formed on the waterproof sound-transmitting layer, thus maintaining waterproof and sound-transmitting performance by minimizing the displacement amount while maintaining stretch-shrinkage performance of the waterproof sound-transmitting layer even when a pressure of about 1 atm or more is applied thereto.
1. A waterproof sound-transmitting sheet, comprising:
a waterproof sound-transmitting layer formed of a non-porous film having elasticity;
a first adhesive layer having a hole therein and adhered to one surface of the waterproof sound-transmitting layer; and
a reinforcement member having stiffness higher than that of the waterproof sound-transmitting layer,
wherein the reinforcement member is disposed inside the hole of the first adhesive layer, formed on the one surface of the waterproof sound-transmitting layer, and spaced apart from the first adhesive layer inside the hole to suppress the stretchiness of the waterproof sound-transmitting layer when a water pressure is applied,
wherein the reinforcement member is a ring shape having a hole therein, and
wherein an outer circumference of the reinforcement member is disposed on the one surface of the waterproof sound-transmitting layer and spaced apart from the first adhesive layer.
2. The waterproof sound-transmitting sheet of claim 1 ,
wherein the reinforcement member is formed on at least one of one surface and the other surface of the waterproof sound-transmitting layer to improve the water pressure resistance characteristic of the waterproof sound-transmitting layer.
3. The waterproof sound-transmitting sheet of claim 1 ,
wherein the thickness of the reinforcement member is formed to be thinner than the thickness of the first adhesive layer.
4. The waterproof sound-transmitting sheet of claim 1 ,
wherein the reinforcement member is not deformed when a pressure of 1 atm is applied thereto.
5. The waterproof sound-transmitting sheet of claim 1 ,
wherein the reinforcement member is configured to contain at least one among polyethylene terephthalate, polypropylene, polyethylene, and Nylon.
6. The waterproof sound-transmitting sheet of claim 1 ,
wherein the reinforcement member is formed by hardening some areas of the waterproof sound-transmitting layer.
7. The waterproof sound-transmitting sheet of claim 1 ,
wherein the waterproof sound-transmitting layer comprises
a first area for acoustic transmission; and
a second area for reinforcing the strength of the waterproof sound-transmitting layer, and
wherein the first area is disposed on the outer circumference of the second area.
8. The waterproof sound-transmitting sheet of claim 7 ,
wherein the waterproof sound-transmitting layer further comprises a third area for acoustic transmission, and
wherein the third area is disposed on the inner circumference of the second area having a ring shape.
9. The waterproof sound-transmitting sheet of claim 7 ,
wherein the waterproof sound-transmitting layer further comprises a fourth area disposed on the outer circumference of the first area to be adhered to the first adhesive layer.
10. The waterproof sound-transmitting sheet of claim 1 ,
wherein the first adhesive layer is formed in a ring shape.
11. The waterproof sound-transmitting sheet of claim 1 , further comprising a second adhesive layer formed in a ring shape having a hole formed therein to be adhered to the other surface of the waterproof sound-transmitting layer.