KR890016306A - 진동 감쇠 재료와 상기 감쇠 재료를 이용한 방음구조 - Google Patents

진동 감쇠 재료와 상기 감쇠 재료를 이용한 방음구조 Download PDF

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Publication number
KR890016306A
KR890016306A KR1019890004166A KR890004166A KR890016306A KR 890016306 A KR890016306 A KR 890016306A KR 1019890004166 A KR1019890004166 A KR 1019890004166A KR 890004166 A KR890004166 A KR 890004166A KR 890016306 A KR890016306 A KR 890016306A
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South Korea
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rubber
vibration damping
damping material
synthetic resin
materials
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KR1019890004166A
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KR910008868B1 (ko
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다까히로 니와
야스오 시미즈
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오또마 다까시
니찌아스 가부시끼가이샤
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/16—Layered products comprising a layer of metal next to a particulate layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
    • E04B9/045—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like being laminated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
    • F16F9/306—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium of the constrained layer type, i.e. comprising one or more constrained viscoelastic layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/239—Complete cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
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    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31696—Including polyene monomers [e.g., butadiene, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31699—Ester, halide or nitrile of addition polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31826—Of natural rubber

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Vibration Prevention Devices (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

내용 없음

Description

진동 감쇠 재료와 상기 감쇠 재료를 이용한 방음구조
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도 내지 제 8 도는 본 발명의 각 실시예를 도시한 측면도.

Claims (16)

  1. 진동 감쇠 재료에 있어서, 한면상에 형성된 점탄성 중합체층상에 고무 또는 합성수지를 구비한 금속판형태의 제1 및 제2 재료와 상기 점탄성 중합층을 통하여 서로 반대로 배치됨과 동시에 상기 제1재료와 제2재료를 서로 결합시키는 고용융점을 갖는 고용융 점착성 합성수지막으로 결합된 것을 특징으로 하는 진동 감쇠 재료.
  2. 진도 감쇠 재료에 있어서, 양면에 형성된 점탄성 중합층들 상에 공무 또는 합성수지를 구비한 금속판 형태의 제1 및 제2 재료와, 상기 점탄성 중합층들을 통하여 서로 반대로 배치됨과 동시에 상기 제1 재료와 재2 재료를 서로 결합시키고 고용융점을 갖는 고용융 점착성 합성수지막으로 결합된 것을 특징으로 하는 진동 감쇠 재료.
  3. 진동 감쇠 재료에 있어서, 한면상에 형성된 점탄성 중합층상에 고무 또는 합성수지를 구비한 금속판 형태의 제1재료와, 양면상에 형성된 점탄성 중합층들 상에 고무 또는 합성수지를 구비한 금속판 형태의 제2재료와, 상기 점탄성 중합층을 통하여 서로 반대로 배치됨과 동시에 상기 제1재료와 제2재료들을 각각 결합시키는 고용융점을 갖는 고온 용융접착성 합성수지막으로 결합된 것을 특징으로 하는 진동 감쇠 재료.
  4. 진동 감쇠 재료에 있어서, 한면상에 형성된 점탄성 중합층상에 고무 또는 합성수지를 구비한 금속한 형태의 제1재료와, 금속판 형태의 제2재료와, 상기 점탄성 중합층으로 인해 각각 반대로 배치됨과 동시에 상기 제1, 제2재료들을 서로 결합시키고 고용융점을 갖는 고온 용융점착성 합성 수지막으로 결합된 것을 특징으로 하는 진동 감쇠 재료.
  5. 진동 감쇠 재료에 있어서, 양면상에 형성된 점탄성 중합층들상에 고무 또는 합성수지를 구비한 금속판 형태의 제1재료와, 금속판 형태의 제2재료와, 상기 점탄성 중합층으로 인해 각각 반대로 배치됨과 동시에 상기 제1재료와 제2재료들을 서로 결합시키는 고용융점을 갖는 고온 용융점착성 합성수지막으로 결합된 것을 특징으로 하는 진동 감쇠재료.
  6. 양면상에 형성된 점탄성 중합층들상에 고무 또는 합성수지를 구비한 금속판 형태의 제1재료와 금속판 형태의 제2 및 제3재료와, 상기 점탄성 중합체들로 인해 서로 반대로 배치됨과 동시에 상기 제1,제2 및 제3재료들을 결합시키는 고용융점을 갖는 고온 용융점착성 합성 수지막들로 결합된 것을 특징으로 하는 진동 감쇠재료.
  7. 진동 감쇠 재료에 있어서, 한면상에 형성된 점탄성 중합층상에 고무 또는 합성수지를 구비한 금속판 형태의 제1 및 제2재료와, 금속판 형태의 제3재료와, 상기 점탄성 중합층들로 인해 서로 반대로 배치됨과 동시에 상기 제1 및 제2재료를 상기 제3재료에 결합시키는 고용융점을 갖는 제1 및 제2고온 용융 점착 합성수지막들로 결합된 것을 특징으로 하는 진동 감쇠 재료.
  8. 진동 감쇠 때문에 있어서, 양면상에 형성된 점탄성 중합층들상에 고무 또는 합성수지를 구비한 금속판 형태의 제1 및 제2재료와, 금속판 형태의 제3재료 및 상기 점탄성 중합층들로 인해 서로 반대로 배치됨과 동시에 상기 제1 및 제2재료를 제3재료에 결합시키는 고용융점을 갖는 제1 및 제2고온 용융 합성수지막들로 결합된 것을 특징으로 하는 진동 감쇠재료.
  9. 방음 구조에 있어서, 소음 발생부를 두러싸는 음향흡수 재료와, 상기 음향 흡수 재료의 피복 판낼을 형성하는 제1항 내지 제8항중 어는 한 항에 의한 진동 감쇠 재료로 결합된 것을 특징으로 하는 방음 구조.
  10. 방음 구조에 있어서, 지지구를 통하여 소음 발생부에 연결하는 제1항 내제 제8항중 어는 한 항에 의한 진동 감쇠재료와, 상기 지지주를 통하여 상기 소음 발생부에서 부터 상기 진동 감쇠 재료까지 발생되는 진동의 직접 전달을 차단하기 위한 방음 수단들로 결합된 것을 특징으로 하는 방음 구조.
  11. 방음 구조에 있어서, 소음 발생 덕트를 둘러산 펠트 음향 흡수 재료와 음향 절연층 재료를 포함하는 부재와, 상기 부재의 외부에 설치된 진동 감쇠 재료와, 한면상에 형성된 점탄성 중합층상에 아크로로-니트릴부타디엔 고무(NBT)를 구비한 철판과 상기 점탄성 중합층에 의해 서로 반대로 배치됨과 동시에 고온 용융 점착 합성수지층을 사용하여 상기 철판에 결합되는 착색 철판을 포함하는 상기 진동 감쇠 재료로 결합된 것을 특징으로 하는 진동 감쇠 구조.
  12. 제 1 항 내지 제 5 항중 어느 한 항에 있어서, 상기 금속판으로 철판, 아연판, 알루미늄판, 스테일레스스틸판, 황동판, 구리판, 니켈판, 주석판 중의 하나로 이루어진 것을 특징으로 하는 진동 감쇠 재료.
  13. 제 1 항 내지 제 8 항중 어느 한항에 있어서, 상기 점탄성 중합층은 아크릴로니트릴-부타디엔고무, 스티렌-부타디엔고무, 천연고무, 부틸고무, 에틸렌-프로필렌 중합체 부타디엔 고무 아이스프린 고무, 클로로프린 고무, 에틸렌 프로필렌고무, 아크릴 고무, 실리콘 고무, 불소고무, 이피클로하이드린고무, 우레탄 고무, 폴리노브린 고무 및 에틸렌 아크릴 고무중의 하나로 이루어진 것을 특징으로 하는 진동 감쇠 재료.
  14. 제 1 항 내지 제 8 항중 어는 한 항에 있어서, 상기 고용융점을 갖는 고온 용융점착 합성수지로서 나일론, 폴리에스터, 폴리프로필렌, 폴리에틸렌, 불소수지 중의 하나로 이루어진 것을 특징으로 하는 진동 감쇠 재료.
  15. 제 6 항 내지 제 8 항중 어는 한 항에 있어서, 상기 제2, 제3재료를 형성하는 금속층들은 포면처리된 진동 감쇠재료.
  16. 제 15 항에 있어서, 상기 금속층은 아연도금 철판, 착색 아연도금 철판, 비닐 클로라이드 코팅 철판, 불소수지 코팅철판, 알루미늄 철판, 착색 알루미늄 철판, 알루미늄 박(foil)크라프트 종이 적층 알루미늄판, 스테일레스 스틸판, 착색 스테인레스 스틸판, 납판중의 하나로 이루어진 것을 특징으로 하는 감쇠 재료.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890004166A 1988-04-01 1989-03-31 진동 감쇠 재료와 상기 감쇠 재료를 이용한 방음구조 KR910008868B1 (ko)

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WO2023043820A1 (en) * 2021-09-14 2023-03-23 Intellectual Property Holdings, Llc Damped sheet metal components, methods of forming and vehicles including the same
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EP0642920B1 (en) 2002-10-30
DE68929432D1 (de) 2002-12-05
EP0335642A2 (en) 1989-10-04
JPH0673935B2 (ja) 1994-09-21
US5063098A (en) 1991-11-05
JPH02117825A (ja) 1990-05-02
EP0642920A2 (en) 1995-03-15
DE68929432T2 (de) 2003-06-26
EP0335642B1 (en) 1995-12-13
EP0642920A3 (en) 1996-04-24
KR910008868B1 (ko) 1991-10-24
DE68925053D1 (de) 1996-01-25
EP0335642A3 (en) 1990-08-16
DE68925053T2 (de) 1996-05-09

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