Waterproof sound-transmitting sheet and method for manufacturing waterproof sound-transmitting sheet
AssigneeAmogreentech Co., Ltd.
InventorJunkeun CHO
Life of this patent
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Abstract
A waterproof sound-transmitting sheet is disclosed. The waterproof sound-transmitting sheet comprises: a waterproof sound-transmitting layer having a waterproofing function and configured to transmit a sound; a first adhesive layer attached to a first surface of the waterproof sound-transmitting layer; and a second adhesive layer attached to a second surface of the waterproof sound-transmitting layer, opposite to the first surface, wherein the waterproof sound-transmitting layer comprises: a pore-free layer having no pores; and a porous layer laminated on the pore-free layer and containing pores.
Claims6
A method of manufacturing a waterproof sound-transmitting sheet, comprising:
- preparing a collecting support;
- preparing a spinning solution containing a polymer material and a solvent, wherein the polymer material includes thermoplastic polyurethane (TPU) and polyvinylidene fluoride (PVDF), and the polyvinylidene fluoride (PVDF) is present in an amount of up to 20 wt % based on a total weight of the polymer material;
- forming a porous layer having a web structure in which a plurality of fibers are laminated by intersecting each other by electrospinning the spinning solution on one surface of the collecting support;
- and
- forming a pore-free layer by dissolving a portion of the porous layer adjacent to the one surface of the collecting support with the solvent contained in the spun spinning solution, such that the plurality of fibers having the web structure are entangled with each other and pores of the porous layer are blocked.
Dependencies are inferred from the claim text.