# US 8,739,927 B2 · Gypsum panel having outstanding sound-absorbing properties and a production method therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,927 B2 - Document ID: US8739927B2 - Status: Granted - Kind: B2 - Application number: 13/877,965 - Filed: 2011-10-06 - Published: 2013-08-08 - Granted: 2014-06-03 - Earliest claimed: 2010-10-07 - Assignees: LG Hausys, Ltd. - Applicants: Gil-Ho Kang; Heon-Sung Kang; Seong-Moon Jung - Inventors: Gil-Ho Kang; Heon-Sung Kang; Seong-Moon Jung - Web page: https://patentgrep.com/patent/US8739927B2 ## CPC - E04B 1/8409: {sheet-shaped} - B32B 37/16: with all layers existing as coherent layers before laminating - B32B 38/145: {Printing} - E04B 1/86: slab-shaped - E04C 2/043: {of plaster (E04C2/049 takes precedence)} - E04B 2001/8461: {layered} - E04B 2001/8485: {the opening being restricted, e.g. forming Helmoltz resonators} - E04B 2001/8495: {the openings going through from one face to the other face of the element} - Y10T 156/10: Methods of surface bonding and/or assembly therefor - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Disclosed is a gypsum panel having outstanding sound-absorbing properties whereby it is possible to impart various aesthetic effects while also having outstanding sound-absorbing effects. The gypsum panel having outstanding sound-absorbing properties according to the present invention comprises: a perforated gypsum body having a plurality of holes, and a sound-absorbing cover layer which is attached to one side of the gypsum body and which has through-holes of a smaller size than the holes, wherein the mean diameter of the through-holes is between 10 and 40 μm. ## Claims ### Claim 1 A gypsum panel having sound-absorbing properties, the gypsum panel comprising: a perforated gypsum body having a plurality of holes; and a sound-absorbing cover layer attached to one side of the gypsum body and having through-holes of a smaller size than the holes, the through-holes having an average diameter of 10 μm to 40 μm, wherein at least one of the holes of the perforated gypsum body is overlapped with at least one of the through-holes of the sound-absorbing cover layer, and the overlapped holes are extended through an entire thickness of the gypsum panel. ### Claim 2 (depends on 1) The gypsum panel according to claim 1, wherein the sound-absorbing cover layer is a non-woven fabric formed of at least one of glass fiber, polyester fiber, and pulp. ### Claim 3 (depends on 1) The gypsum panel according to claim 1, wherein the gypsum body includes a gypsum board and a finishing material attached to one or both sides of the gypsum board. ### Claim 4 (depends on 1) The gypsum panel according to claim 1, wherein the gypsum body is a finished tile. ### Claim 5 (depends on 1) The gypsum panel according to claim 1, wherein the holes have an average diameter of 0.5 mm to 20 mm. ### Claim 6 (depends on 1) The gypsum panel according to claim 1, wherein the sound-absorbing cover layer comprises a finishing layer having a pattern printed on an outer surface thereof. ### Claim 7 (depends on 1) The gypsum panel according to claim 1, wherein the gypsum panel has an air permeability of 100 L/m2/s to 2,000 L/m2/s at 200 Pa. ### Claim 8 (depends on 1) The gypsum panel according to claim 1, wherein one side of the sound-absorbing cover layer is attached to the one side of the gypsum body, and the other side of the sound-absorbing cover layer is disposed to face a ceiling or a wall of a building. ### Claim 9 A method of manufacturing a gypsum panel having sound-absorbing properties, the method comprising: preparing a perforated gypsum body having a plurality of holes; and attaching a sound-absorbing cover layer to one side of the gypsum body, the sound-absorbing cover having through-holes of a smaller size than the holes, wherein the through-holes have an average diameter of 10 μm to 40 μm and the holes have an average diameter of 0.5 mm to 20 mm, and wherein at least one of the holes of the perforated gypsum body is overlapped with at least one of the through-holes of the sound-absorbing cover layer, and the overlapped holes are extended through an entire thickness of the gypsum panel. ### Claim 10 (depends on 9) The method according to claim 9, wherein the sound-absorbing cover layer is a non-woven fabric formed of at least one of glass fiber, polyester fiber, and pulp. ### Claim 11 (depends on 9) The method according to claim 9, further comprising: printing a pattern on an outer surface of the sound-absorbing layer to form a finishing layer after said attaching the sound-absorbing layer to the one side of the gypsum body. ### Claim 12 (depends on 9) The method according to claim 9, further comprising: directly printing a pattern on the sound-absorbing cover layer by partially coating a non-woven fabric with a polyvinyl chloride (PVC) sol. ### Claim 13 (depends on 1) The gypsum panel according to claim 1, wherein the sound-absorbing cover layer comprises: a non-woven fabric; and a pattern of polyvinyl chloride (PVC) directly and partially coated on the non-woven fabric.