SOUND ABSORPTION SHEET

• Main Authors: IISHI HIROYUKI, MATSUO KAZUMI
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2017
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SOUND-PRODUCING DEVICES; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To manufacture a sound absorption sheet that can stably obtain high-sound absorption performance without causing complication of manufacturing process.SOLUTION: The sound absorption sheet 10 having a foam layer 13 and skin layers 11, 12 is formed by extrusion molding with which integral molding is readily conducted. The foam layer 13 is formed from a front-side skin layer 11 to a back-side skin layer 12 and a hole 10a is formed in at least one of the skin layers to improve sound absorption performance.SELECTED DRAWING: Figure 5 【課題】高い吸音性能が安定して得られる吸音シートを、製造工程の複雑化を招くことなく製造できるようにする。【解決手段】発泡層１３とスキン層１１、１２を有する吸音シート１０を一体成形が容易な押出成形品とし、発泡層１３を表側スキン層１１から裏側スキン層１２まで形成し、少なくとも一方のスキン層に孔１０ａを形成して吸音性能を向上させた。【選択図】図５