KR100202743B1 - Structural body for absorbing and insulating noise - Google Patents

Structural body for absorbing and insulating noise Download PDF

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Publication number
KR100202743B1
KR100202743B1 KR1019970017705A KR19970017705A KR100202743B1 KR 100202743 B1 KR100202743 B1 KR 100202743B1 KR 1019970017705 A KR1019970017705 A KR 1019970017705A KR 19970017705 A KR19970017705 A KR 19970017705A KR 100202743 B1 KR100202743 B1 KR 100202743B1
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South Korea
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sound absorbing
insulating material
layer
foamed resin
resin layer
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KR1019970017705A
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Korean (ko)
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KR970058897A (en
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권회현
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권회현
대한화학공업주식회사
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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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2419/00—Buildings or parts thereof
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings

Abstract

본 발명은 자동차나 기타 운송수단 또는 방음벽이나 건물 등에 적용되어 효과적으로 소음을 흡수차단하도록 된 흡차음재에 관한 것이다.The present invention relates to a sound absorbing and insulating material that is applied to automobiles or other vehicles or soundproof walls or buildings to effectively absorb noise.

본 발명에 따르면, 발포수지층(11)과 펠트층(12)이 적층된 적층재를 포함하는 흡차음재(10)에 있어서, 상기 발포수지층(11)의 적어도 일면에는 엠보싱돌기(14)가 형성된 것을 특징으로 하는 흡창음재(10)가 제공된다.According to the present invention, in the sound absorbing and insulating material 10 including a laminate in which the foamed resin layer 11 and the felt layer 12 are laminated, an embossing protrusion 14 is formed on at least one surface of the foamed resin layer 11. Provided is a sound absorbing material 10, characterized in that formed.

Description

흡차음재Sound absorbing and insulating material

본 발명은 흡차음재에 관한 것으로서, 좀 더 상세히는 자동차나 기타, 운송수단 또는 방음벽이나 건물 등에 적용되어 효과적으로 소음을 흡수차단하도록 된 흡차음재에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sound absorbing and insulating materials, and more particularly, to sound absorbing and insulating materials, which are applied to automobiles, other vehicles, vehicles, soundproof walls, buildings, etc. to effectively absorb noise.

자동차의 차체의 각 부위에는 각종 흡차음재가 부착된다. 이러한 흡차음재는 엔진룸이나 동력전달계통에서 발생되는 소음의 전달을 차단반사시키는 차음기능과 소음을 감쇄하여 흡수하는 흡음기능을 통해 소음이 차 실내로 침투하는 것을 방지하게 된다. 중장비나 기타 운송수단에 있어서도 엔진이나 작동부에서 발생하는 소음이 운전실 또는 외부로 전달되는 것을 방지하기 위해 흡차음재가 사용될 수 있다. 또한, 도로변에 설치되는 방음벽의 내부에도 흡차음재를 삽입하여 소음의 전달을 방지하게 된다.Various sound absorbing and insulating materials are attached to each part of the vehicle body of the vehicle. The sound absorbing and insulating material prevents noise from penetrating into the vehicle interior through a sound insulation function that cuts off the transmission of noise generated in an engine room or a power transmission system and a sound absorption function that attenuates and absorbs the noise. In heavy equipment or other means of transport, sound absorbing and insulating materials can also be used to prevent noise from the engine or operating parts from being transmitted to the cab or outside. In addition, the sound absorbing and insulating material is inserted into the soundproof wall installed on the roadside to prevent the transmission of noise.

이러한 흡차음재 중에는 발포우레탄과 같은 저밀도의 발포수지층과, 레진펠트를 다층으로 적층하고, 외부면에는 부직포나 수지필름으로 마감한 구조를 가진 적층시트가 많이 사용되고 있다. 제1도는 종래에 자동차용 흡차음재로 사용되는 것을 예시적으로 보여주는데, 도시된 바와 같이, 흡차음재(10)는 중앙의 발포폴리우레탄수지로 된 발포수지층(11)과, 그 외측에 적층된 펠트등(12) 및 부직포로 된 마감층(13) 등으로 구성된다. 흡차음재의 설치부위에 따라 발포수지층(11) 상하측의 펠트층(12)중 어느 하나가 생략되기도 하고, 마감재(13)가 필요없는 설치부위에서는 마감층(13)이 생략되기도 한다.Among such sound absorbing and insulating materials, a laminated sheet having a structure in which a low-density foamed resin layer such as urethane and a resin felt are laminated in multiple layers and the outer surface is finished with a nonwoven fabric or a resin film is used. Figure 1 shows that conventionally used as a sound absorbing and insulating material for automobiles, as shown, the sound absorbing and insulating material 10 is a foamed resin layer 11 made of a foamed polyurethane resin in the center, and laminated on the outside It consists of a felt lamp 12 and a finishing layer 13 made of a nonwoven fabric. Depending on the location of the sound absorbing and insulating material, any one of the felt layers 12 above and below the foamed resin layer 11 may be omitted, and the finishing layer 13 may be omitted at the installation site where the finishing material 13 is not required.

이러한 적층체로 된 흡차음재는 발포수지층(11)이나 펠트층(12)의 소재 내부에 형성된 에어셀 속에 음파가 침투하면 소리에너지가 열에너지로 변화되어 소음이 감쇄되어 흡음효과를 발하게 된다. 그런데, 자동차의 소음은 그 주파수의 범위가 대체로 20Hz에서 2000Hz에 이르는 광범위한 주파수범위에 이르고 있는데, 종래의 발포수지나 펠트층의 소재자체에 형성된 에어셀은 그 크기가 작어서 고주파소음의 감쇄에는 효과가 있으나, 대략 400Hz이하의 저주파소음에 대하여는 별다른 감쇄효과를 얻을 수 없다. 따라서, 종래의 자동차의 흡차음재는 저주파소음에 대하여는 별다른 대비책이 되지 못하였다. 이러한 문제점은 기타의 운송수단이나 건물 또는 방음벽의 흡차음재에 있어서도 마찬가지로 지적될 수 있다.In the sound absorbing and insulating material of the laminate, when sound waves penetrate into the air cell formed inside the material of the foamed resin layer 11 or the felt layer 12, the sound energy is changed to thermal energy, and the noise is attenuated to give a sound absorbing effect. By the way, the noise of the automobile reaches a wide range of frequencies ranging from 20Hz to 2000Hz. The air cells formed in the foamed resin or felt layer itself are small in size, which is effective for attenuation of high frequency noise. However, no attenuation effect can be obtained for low frequency noise below about 400Hz. Therefore, the sound absorbing and insulating material of a conventional vehicle was not prepared for low frequency noise. This problem can be pointed out similarly in other vehicles, sound absorbing materials for buildings or soundproof walls.

또한, 흡차음재는 소음에 노출되는 표면적이 넓을수록 단위면적당 흡차음효과가 좋은데, 종래의 흡차음재는 대체로 표면이 평탄하게 성형되어 표면적이 증대로 인한 흡차음효과의 증대를 기대할 수 없었다.In addition, the sound absorbing and insulating material has a good sound absorbing and insulating effect per unit area as the surface area exposed to noise increases. However, in the conventional sound absorbing and insulating material, the surface of the sound absorbing and insulating material is generally formed flat, so that the sound absorbing and insulating effect due to the increase of the surface area cannot be expected.

본 발명은 전술한 바와같은 종래의 흡차음재의 문제점에 착안하여 제안된 것으로서, 고주파소음은 물론 저주파소음에 대한 감쇄효과가 높으며, 표면적이 넓어서 단위면적당 흡차음효과가 우수한 새로운 구조의 흡차음재를 제공하고자 하는 것이다.The present invention has been proposed in view of the problems of the conventional sound absorbing and insulating material as described above, and has a high attenuation effect for high frequency noise as well as low frequency noise, and provides a sound absorbing and insulating material having a new structure excellent in sound absorbing and insulating effect per unit area due to its wide surface area. I would like to.

제1도는 종래의 흡차음재의 예시도.1 is an illustration of a conventional sound absorbing and insulating material.

제2도는 본 발명의 일실시예에 따른 흡차음재의 단면구성도.2 is a cross-sectional view of a sound absorbing and insulating material according to an embodiment of the present invention.

제3도 내지 제4도는 본 발명의 다른 실시예의 단면구성도.3 to 4 are cross-sectional view of another embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 흡차음재 11 : 발포수지층10: sound absorbing and insulating material 11: foamed resin layer

12 : 펠트층 13 : 마감층12: felt layer 13: finishing layer

14 : 엠보싱돌기 15 : 공기층14: embossing projection 15: air layer

16 : 고밀도부 17 : 저밀도부16: high density 17: low density

20 : 차체 또는 내장재20: body or interior material

본 발명에 따르며, 발포수지층(11)과 펠트층(12)이 적층된 적층재를 포함하는 흡차음재(10)에 있어서, 상기 발포수지층(11)의 적어도 일면에는 엠보싱돌기(14)가 형성된 것을 특징으로 하는 흡차음재(10)가 제공된다.According to the present invention, in the sound absorbing and insulating material 10 including a laminate in which the foamed resin layer 11 and the felt layer 12 are laminated, an embossing protrusion 14 is formed on at least one surface of the foamed resin layer 11. Sound absorbing and insulating material 10 is provided, characterized in that formed.

이하에서 도면을 참조하여 본 발명의 바람직한 실시예를 설명한다. 제2도는 본 발명의 일실시에의 흡차음재로서, 도시된 바와같이, 발포수지층(11)과 펠트(12)이 적층되고, 펠트층(12)의 외측에는 마감층(13)이 피복된 흡차음재(10)가 제공된다. 바람직한 발포수지층(11)은 저밀도로 발포처리된 폴리우레탄수지로 제작하고, 펠트층(12)은 잡직물에 레진을 침투시킨 레진펠트로 제작하며, 마감층(13)은 부직포 또는 적절한 수지필름으로 제작한다. 이러한 적층시트에서, 펠트층(12)에 면하는 발포수지층(11)의 외부면에는 엠보싱성형에 의한 엠보싱돌기(14)가 형성된다. 이 엠보싱돌기(14)는 발포수층(11)의 성형시에 성형한다. 이 엠보싱돌기(14)로 인해 발포수지층(11)과 펠트층(12)의 사이에는 다수의 공기층(15)이 형성된다. 흡차음재의 설치부위에 따라 마감층(13)은 생략될 수 있다. 또한, 이러한 적층시트로 된 흡차음재(10)를 자동차에 적용하는 경우에는, 차체패널의 윤곽형상이나 구성품의 형상에 부합되도록 시트의 둘레부를 포함하여 부분적으로 고밀도로 압착한 고밀도부(16)와 상대적으로 저밀도로 압착한 저밀도부(17)로 구획하여, 고밀도부(16)가 흡차음재(10)의 형태를 유지하는 지지부로 기능하게 한다.Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. 2 is a sound absorbing and insulating material according to an embodiment of the present invention, as shown, the foamed resin layer 11 and the felt 12 is laminated, the outer layer of the felt layer 12 is coated with a finishing layer 13 A sound absorbing and insulating material 10 is provided. The preferred foamed resin layer 11 is made of low-density foamed polyurethane resin, the felt layer 12 is made of resin felt infiltrating the resin into the woven fabric, and the finishing layer 13 is made of a nonwoven fabric or a suitable resin film. To make. In such a laminated sheet, embossing protrusions 14 by embossing are formed on the outer surface of the foamed resin layer 11 facing the felt layer 12. This embossing protrusion 14 is molded at the time of molding the foamed water layer 11. Due to the embossing protrusion 14, a plurality of air layers 15 are formed between the foamed resin layer 11 and the felt layer 12. The finishing layer 13 may be omitted according to the installation portion of the sound absorbing and insulating material. In addition, when the sound absorbing and insulating material 10 made of such a laminated sheet is applied to an automobile, the high density portion 16 partially squeezed at high density including the periphery of the seat so as to conform to the contour shape of the vehicle body panel and the shape of the component and The low-density portion 17, which is compressed at a relatively low density, is partitioned so that the high-density portion 16 functions as a supporting portion for maintaining the shape of the sound absorbing and insulating material 10. FIG.

이러한 구성에 따라, 발포수지층(11)과 펠트층(12)의 재료 내부에 존재하는 작은 에어셀에 더하여, 엠보싱돌기(14)에 의해 형성된 상대적으로 큰 공기층(15)이 형성되어 저주파소음이 이 공기층(15)에서 포획 감쇄되어 더욱 광범위한 주파수범위에서 흡음성능을 발휘할 수 있다. 또한, 엠보싱돌기(14)로 인해 발포수지층(11)의 표면적이 증대도는 만큼 단위면적당 흡음효과도 높아지게 된다.According to this configuration, in addition to the small air cells existing inside the material of the foamed resin layer 11 and the felt layer 12, a relatively large air layer 15 formed by the embossing protrusions 14 is formed so that low frequency noise The trapped attenuation in the air layer 15 can exhibit sound absorption performance in a wider frequency range. In addition, as the surface area of the foamed resin layer 11 increases due to the embossing protrusion 14, the sound absorbing effect per unit area also increases.

제3도는 본 발명의 또다른 실시예로서, 발포수지층(11)과 펠트층(12) 및 마감층(13)이 순차로 적층된 흡차음재(10)에서 외부에 면한 발포수지층(11)의 표면에 엠보싱돌기(14)를 형성한 것이다. 이 경우에는 자동차의 차체패널이나 내장재(20)와 발포수지층(11) 사이에서 엠보싱돌기(14)에 의해 형성되는 공기층(15)에 의한 저주파 소음감소 및 표면적 증대로 인한 단위면적당 흡음율 증가의 효과를 얻을 수 있다.3 is a further embodiment of the present invention, the foamed resin layer 11 facing the outside in the sound absorbing and insulating material 10 in which the foamed resin layer 11, the felt layer 12 and the finishing layer 13 are sequentially stacked. The embossed protrusion 14 is formed in the surface of the embossed protrusion 14. In this case, the effect of increasing the sound absorption rate per unit area due to the low frequency noise reduction and surface area increase by the air layer 15 formed by the embossing protrusion 14 between the vehicle body panel or interior material 20 and the foamed resin layer 11 of the automobile. Can be obtained.

제4도는 본 발명의 또다른 실시예로서, 발포수지층(11)의 양면에 엠보싱돌기(14)를 형성하고, 발포수지층(11)의 외측에 펠트층(12)과 마감층(13)을 적층한 것이다. 따라서, 공기층(15)이 양쪽에 형성되고 표면적의 증대효과도 배가될 수 있다. 이와같이, 발포수지층(11)과 펠트층(12)의 적층수나 배열형태 또는 엠보싱돌기(14)의 배치는 본 발명의 범위 내에서 적절히 선택될 수 있음은 물론이다.4 is an embodiment of the present invention, the embossed projections 14 are formed on both sides of the foamed resin layer 11, the felt layer 12 and the finishing layer 13 on the outer side of the foamed resin layer (11) It is laminated. Therefore, the air layer 15 is formed on both sides, and the effect of increasing the surface area can also be doubled. As such, the number of laminated resins or the arrangement of the foamed resin layer 11 and the felt layer 12 or the arrangement of the embossing protrusions 14 may be appropriately selected within the scope of the present invention.

본 발명은 주로 자동차용 흡차음재를 대상으로 설명하였으나, 본 발명의 흡차음재는 각종 운반기계나 건물 또는 방음벽용 흡차음재로 사용될 수도 있을 것이다.Although the present invention has been mainly described as a sound absorbing and insulating material for automobiles, the sound absorbing and insulating material of the present invention may be used as a sound absorbing and insulating material for various transport machines or buildings or soundproof walls.

이상에서 설명한 본 발명에 따르면, 발포수지층(11)과 펠트층(12)의 적층재를 포함하는 흡차음재에서, 발포수지층(11)의 일면 또는 양면에 엠보싱돌기(14)를 형성함으로써 저주파소음에 대한 감쇄특성을 강화시키고 단위면적당 표면적을 증대하여 전체로서 흡차음성능이 우수한 새로운 구조의 흡차음재를 제공할 수 있다.According to the present invention described above, in the sound absorbing and insulating material comprising the laminated material of the foamed resin layer 11 and the felt layer 12, by forming the embossed projection 14 on one side or both sides of the foamed resin layer 11 low frequency It is possible to provide a sound absorbing and insulating material having a new structure excellent in sound absorbing and insulating performance as a whole by reinforcing attenuation characteristics against noise and increasing the surface area per unit area.

Claims (1)

발포수지층(11)과 펠트층(12)이 적층된 적층재를 포함하는 흡차음재(10)에 있어서, 상기 발포수지층(11)의 적어도 일면에는 엠보싱돌기(14)가 형성된 것을 특징으로 하는 흡차음재(10).In the sound absorbing and insulating material 10 including a laminate in which the foamed resin layer 11 and the felt layer 12 are laminated, an embossing protrusion 14 is formed on at least one surface of the foamed resin layer 11. Sound absorbing and insulating material 10.
KR1019970017705A 1997-05-08 1997-05-08 Structural body for absorbing and insulating noise KR100202743B1 (en)

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