KR101293470B1 - Soundproofing material for vehicle - Google Patents

Soundproofing material for vehicle Download PDF

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KR101293470B1
KR101293470B1 KR1020060113862A KR20060113862A KR101293470B1 KR 101293470 B1 KR101293470 B1 KR 101293470B1 KR 1020060113862 A KR1020060113862 A KR 1020060113862A KR 20060113862 A KR20060113862 A KR 20060113862A KR 101293470 B1 KR101293470 B1 KR 101293470B1
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South Korea
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sound
film
absorbing layer
layer
thickness
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KR1020060113862A
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Korean (ko)
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KR20080044983A (en
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시노부 후시키
슈이치 미자타
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호와센이 고교 가부시키가이샤
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B5/14—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 a layer differing constitutionally or physically in different parts, e.g. denser near its faces
    • B32B5/142—Variation across the area of the 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
    • 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
    • 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
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • 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

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)

Abstract

경량이고, 얇고 우수한 방음성능을 가지며, 게다가 자유로운 입체 형상으로 용이하게 성형할 수 있고, 제조 코스트도 경감할 수 있는 차량용 방음재를 제공한다. Provided is a vehicle sound insulation material that is lightweight, thin, has excellent sound insulation performance, can be easily molded into a free three-dimensional shape, and can also reduce manufacturing costs.

흡음층(4a)과 중간층(3)과 흡음층(4b)으로 이루어지는 적층구조의 방음재로서, 중간층은 두께 7∼50μ의 열가소성 수지 필름으로 이루어지는 비통기성 필름(1)의 양면에 두께 7∼50μ이고 이 비통기성 필름보다도 저융점의 열가소성 수지 필름으로 이루어지는 열융착 필름(2a, 2b)을 다층 인플레이션 성형에 의해 접착·적층하여 이루어지고, 이 방음재를 가열·가압성형 함으로써 이 열융착 필름이 용융하여 상기 흡음층(4a, 4b)이 비통기성 필름(1)의 양면에 융착되도록 했다. A sound insulation material having a laminated structure composed of a sound absorbing layer 4a, an intermediate layer 3, and a sound absorbing layer 4b, wherein the intermediate layer is 7 to 50 µm thick on both sides of the non-breathable film 1 composed of a thermoplastic resin film having a thickness of 7 to 50 µm. Bonding and laminating the heat-sealed films 2a and 2b made of a thermoplastic resin film having a lower melting point than that of the non-breathable film is performed by multilayer inflation molding, and the heat-sealed film is melted by heating and pressing molding the soundproof material. Sound-absorbing layers 4a and 4b were made to be fused to both surfaces of non-breathable film 1.

흡음층, 중간층, 적층구조, 열가소성 수지 필름, 비통기성 필름, 열융착 필름, 다층 인플레이션 성형, 냉간성형 금형, 오븐 Sound Absorption Layer, Interlayer, Laminated Structure, Thermoplastic Film, Non-Breathable Film, Heat Fusion Film, Multi-layer Inflation Molding, Cold Forming Mold, Oven

Description

차량용 방음재{SOUNDPROOFING MATERIAL FOR VEHICLE}Soundproofing materials for vehicles {SOUNDPROOFING MATERIAL FOR VEHICLE}

도 1은 본 발명에 따른 차량용 방음재의 중간층의 종단면도; 1 is a longitudinal sectional view of an intermediate layer of a vehicle sound insulation material according to the present invention;

도 2는 본 발명에 따른 차량용 방음재의 분해사시도; 2 is an exploded perspective view of a vehicle sound insulation material according to the present invention;

도 3은 본 발명에 따른 차량용 방음재를 제조하는 오븐의 사시도; 3 is a perspective view of an oven for manufacturing a vehicle sound insulation material according to the present invention;

도 4는 본 발명에 따른 차량용 방음재를 제조하는 냉간성형 금형의 종단면도; Figure 4 is a longitudinal cross-sectional view of a cold forming mold for manufacturing a vehicle sound insulation material according to the present invention.

도 5는 본 발명에 따른 차량용 방음재의 종단면도; 5 is a longitudinal sectional view of a vehicle sound insulation material according to the present invention;

도 6은 본 발명에 따른 차량용 방음재의 차음성능을 도시하는 그래프; 그리고6 is a graph showing the sound insulation performance of the vehicle sound insulation material according to the present invention; And

도 7은 본 발명에 따른 차량용 방음재의 흡음성능을 도시하는 그래프이다.7 is a graph showing the sound absorption performance of the vehicle sound insulation material according to the present invention.

(부호의 설명)(Explanation of Symbols)

1 비통기성 필름 2a, 2b 열융착 필름1 non-breathable film 2a, 2b heat-sealed film

3 중간층 4a, 4b 흡음층3 middle layer 4a, 4b sound absorption layer

5 오븐 7 냉간성형 금형
7a 상형 7b 하형5 oven 7 cold forming mold
7a Upper type 7b Lower type

본 발명은 자동차의 차 실내 바닥면 등에 사용되고, 경량이고, 얇으며 차음 성능 및 흡음 성능이 우수한 차량용 방음재에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle soundproofing material which is used in a vehicle interior floor surface and the like, and is lightweight, thin, and excellent in sound insulation and sound absorption performance.

최근의 차량용 방음재는 경량화가 요구되므로, 종래의 EPDM, 올레핀과 같은 헤비 시트로부터 바뀌어 펠트계의 경량 방음재가 주류가 되고 있다. 그런데 펠트는 흡음성이 우수한 반면, 차음성이 뒤떨어지므로, 그 점을 개선하기 위해서 종래에는 펠트를 압궤하여 통기성을 적게 하는 수법이 채용되고 있었다. In recent years, since the vehicle sound insulation is required to be light in weight, the lightweight sound insulation material of the felt type is becoming mainstream by changing from the conventional heavy sheet like EPDM and olefin. By the way, since felt is excellent in sound absorption, sound insulation is inferior, In order to improve the point, the method of crushing a felt and making air permeability conventionally has been employ | adopted.

한편, 하기 특허문헌 1에는, 펠트 등의 흡음층과 필름 등의 공진층을 소정의 접착 강도로 접착제를 통하여 접착하여 이루어지는 초경량의 방음재가 개시되어 있는데, 이 방음재는 2층 구조이므로, 차 실내의 소음이 흡수되기 어려운 것과, 예를 들면 대시 사일런서(dash silencer)로서 사용하기 위해서는 강성이 부족하여 필요한 형상 안정성이 얻어지지 않는다고 하는 문제가 있다. On the other hand, Patent Document 1 discloses an ultra-light soundproof material formed by bonding a sound-absorbing layer such as felt and a resonant layer such as a film through an adhesive with a predetermined adhesive strength. Since the soundproof material has a two-layer structure, There is a problem that noise is hard to be absorbed, and that, for example, it is insufficient in rigidity and the required shape stability is not obtained for use as a dash silencer.

또, 하기의 특허문헌 2 및 특허문헌 3은 비통기성 필름의 양측에 펠트 등의 흡음층을 설치한 3층 구조의 방음재를 개시하는 것이지만, 종래의 이 종류의 다층 방음재는 필름과 흡음층을 그 중 어느 하나에 접착제를 함침 또는 도포하여 접착하는 것이었으므로, 제조공정이 증가하여 코스트를 상승시킴과 동시에, 차체 형상 등을 본뜬 자유로운 입체형상으로 성형하기 어렵다고 하는 문제가 있었다. Moreover, although following patent document 2 and patent document 3 disclose the sound insulation material of the three-layered structure which provided sound absorption layers, such as a felt, on both sides of a non-breathable film, this conventional multilayer soundproofing material of this kind uses a film and a sound absorption layer. Since the adhesive was impregnated or applied to any one of the adhesives, the manufacturing process was increased, the cost was increased, and there was a problem that it was difficult to form a free three-dimensional shape imitating the shape of the vehicle body.

[특허문헌 1] 일본 특허 제3498085호 공보[Patent Document 1] Japanese Patent No. 3498085

[특허문헌 2] 일본 특개2001-347900호 공보[Patent Document 2] Japanese Patent Application Laid-Open No. 2001-347900

[특허문헌 3] 일본 특허 제3264230호 공보[Patent Document 3] Japanese Patent No. 3264230

그래서 본 발명은 경량이고, 얇고 우수한 방음 성능을 갖고, 게다가 자유로운 입체형상으로 용이하게 성형할 수 있고, 제조 코스트도 경감할 수 있는 차량용 방음재를 제공하고자 하는 것이다. Therefore, an object of the present invention is to provide a sound insulation material for a vehicle that is lightweight, thin and has excellent sound insulation performance, and can be easily molded into a free three-dimensional shape and can also reduce manufacturing cost.

상기 과제를 해결하기 위해서 청구항 1에 기재된 차량용 방음재의 발명은 흡음층과 중간층과 흡음층으로 이루어지는 적층구조의 방음재로서, 중간층은 두께 7∼50μ이고 융점이 160∼250℃인 열가소성 수지 필름으로 이루어지는 비통기성 필름의 양면에 두께 7∼50μ이고 융점이 100∼130℃인 열가소성 수지 필름으로 이루어지는 열융착 필름을 다층 인플레이션 성형에 의해 접착·적층하여 이루어지고, 실내측이 되도록 차체에 붙여진 흡음층은 두께가 0.5∼15mm, 단위면적당 중량이 100∼2000g/m2인 섬유집합체이고, 실외측이 되도록 차체에 붙여진 흡음층은 두께가 5∼40mm, 단위면적당 중량이 500∼3000g/m2인 섬유집합체이고, 이 방음재를 오븐 내에 장입하고 열풍을 그 양면에 불어 대어 가열함으로써, 상기 열융착 필름을 용융시키고, 그 용융의 직후에 이 방음재를, 냉각수 파이프가 내장된 상형과, 성형면에 다수의 흡기구멍이 형성된 하형으로 이루어지는 냉간성형 금형에 이동시키고, 실내측이 되는 흡음층이 이 하형과 마주보도록 하여 이 방음재를 이 냉간성형 금형에 의해 가압함과 함께 이 흡기구멍에 의해 상기 비통기성 필름을 진공 흡인시키는 것에 의해, 상기 비통기성 필름의 양면에 양 흡음층을 용융시켜 이 방음재를 필요한 입체형상으로 성형하여 이루어지는 것을 특징으로 한다. In order to solve the above problems, the invention of the vehicle soundproofing material according to claim 1 is a soundproofing material having a laminated structure consisting of a sound absorbing layer, an intermediate layer and a sound absorbing layer, wherein the intermediate layer is formed of a thermoplastic resin film having a thickness of 7 to 50 µ and a melting point of 160 to 250 ° C. A heat-sealing film made of a thermoplastic resin film having a melting point of 100 to 130 ° C. and a melting point of 100 to 130 ° C. is adhered and laminated by multilayer inflation molding on both sides of the breathable film, and the sound absorbing layer attached to the vehicle body to have an interior side has a thickness. 0.5 to 15 mm, the aggregate weight of 100 to 2000 g / m 2 per unit area, the sound-absorbing layer attached to the vehicle body to the outdoor side is a fiber aggregate of 5 to 40 mm thickness, 500 to 3000 g / m 2 per unit area, The heat-sealing film is melted by charging this soundproofing material in an oven and blowing hot air on both sides thereof to heat the soundproofing immediately after the melting. The cold mold is formed of an upper mold having a cooling water pipe and a lower mold having a plurality of intake holes in the molding surface, and the sound absorbing layer facing the lower mold is placed on the cold mold. It pressurizes by pressurizing and vacuum-absorbs the said non-breathable film by this intake hole, It fuse | melts both sound-absorbing layers on both surfaces of the said non-breathable film, and shape | molds this soundproofing material to the required three-dimensional shape, It is characterized by the above-mentioned.

또, 청구항 2에 기재된 발명은 상기 차량용 방음재에 있어서, 섬유집합체는 펠트인 것을 특징으로 한다. The invention according to claim 2 is characterized in that in the above-described vehicle soundproofing material, the fiber assembly is felt.

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(발명을 실시하기 위한 최량의 형태)Best Mode for Carrying Out the Invention [

인플레이션 성형은, 이미 알고 있는 바와 같이, 압출기에 설치된 인플레이션 금형으로부터 용융수지를 수직 상방으로 밀어냄과 동시에, 이 금형 중앙부로부터 공기를 불기 냄으로써 이 용융수지를 얇은 통 형상으로 팽창시켜 연속 필름을 만드는 방법이며, 이 실시형태에서는 도 1에 도시한 바와 같이, 두께 7∼50μ이고 융점이 160∼250℃인 나일론, 폴리에스테르 등의 열가소성 수지 필름으로 이루어지는 비통기성 필름(1)의 양면에, 두께 7∼50μ이고 융점이 100∼130℃인 폴리에틸렌, 폴리프로필렌 등의 열가소성 수지제 필름으로 이루어지는 열융착 필름(2a, 2b)을 접착·적층 시킨다. 그리고 이것을 중간층(3)으로 한다. Inflation molding, as is known, pushes the molten resin vertically upward from the inflation mold installed in the extruder, and blows air from the center of the mold to expand the molten resin into a thin cylindrical shape to form a continuous film. In this embodiment, as shown in FIG. 1, thickness 7-7 is formed on both surfaces of the non-breathable film 1 which consists of thermoplastic resin films, such as nylon and polyester, whose thickness is 7-50 micrometers and melting | fusing point is 160-250 degreeC. The thermal fusion films 2a and 2b made of a thermoplastic resin film such as polyethylene and polypropylene having a melting point of 100 to 130 ° C. are bonded and laminated. This is referred to as the intermediate layer 3.

한편, 도 2에 도시한 바와 같이, 펠트, 글라스울 등의 섬유집합체 또는 우레탄폼 등의 다공질 합성수지층으로 이루어지는 두께 0.5∼15mm, 단위면적당 중량 100∼2000g/m2의 흡음층(4a)과, 두께 5∼40mm이고, 단위면적당 중량 500∼3000g/m2의 흡음층(4b)을 상기 중간층(3)의 양면에 배치하고, 이것을 도 3에 도시한 바와 같이 오븐(5)의 장입용 트레이(6) 위에 배치하여 이 오븐(5) 내에 장입하고, 약 200℃의 열풍을 그 양면에 불어 대어 30∼60초간 가열함으로써, 상기 열융착 필름(2a, 2b)을 용융시킨다. 그리고 그 직후에 이 방음재를 도 4에 도시한 바와 같은 냉간성형 금형(7)에 이동시키고 가압하여 필요한 입체형상으로 성형한다. 이 때 흡음층(4a, 4b)이 비통기성 필름(1)의 양면에 융착된다. 또한, 냉간성형 금형(7)은 냉각수 파이프가 내장된 상형(7a)과, 성형면에 다수의 흡기구멍이 형성되어 방음재를 진공 흡인할 수 있는 하형(7b)으로 이루어진다. On the other hand, as shown in Fig. 2, a sound absorption layer 4a having a thickness of 0.5 to 15 mm and a weight of 100 to 2000 g / m 2 per unit area made of a fiber aggregate such as felt and glass wool or a porous synthetic resin layer such as urethane foam, A sound absorbing layer 4b having a thickness of 5 to 40 mm and a weight of 500 to 3000 g / m 2 per unit area is disposed on both sides of the intermediate layer 3, and this is shown in FIG. 3. 6) They are placed on top of each other, charged in the oven 5, and heated at about 200 ° C. on both sides thereof and heated for 30 to 60 seconds to melt the heat-sealed films 2a and 2b. Immediately thereafter, the soundproof material is moved to a cold forming die 7 as shown in FIG. 4 and pressurized to form a required three-dimensional shape. At this time, the sound absorbing layers 4a and 4b are fused to both surfaces of the non-breathable film 1. In addition, the cold forming die 7 includes an upper mold 7a in which a cooling water pipe is embedded, and a lower mold 7b in which a plurality of intake holes are formed in the molding surface to vacuum the soundproof material.

이렇게 하여 제조된 차량용 방음재는, 도 5에 도시한 바와 같이, 흡음층(4a)측이 실내측이 되고 흡음층(4b)측이 엔진 룸 또는 차 외측이 되도록 차체에 붙임으로써, 엔진 룸 또는 차 밖 소음을 방음하고, 실내측으로 새어나온 소음은 흡음되어, 차 실내를 정숙하게 한다. As shown in FIG. 5, the vehicle soundproofing material thus manufactured is attached to the vehicle body such that the sound absorbing layer 4a side becomes the indoor side and the sound absorbing layer 4b side becomes the engine room or the outside of the car. The outside noise is soundproofed, and the noise leaking out to the interior side is absorbed, thereby quieting the interior of the car.

그리고 본 발명에 의하면, 가열·가압하여 차량용 방음재를 필요한 입체형상으로 성형함과 동시에 열융착 필름이 용융하여 흡음층이 비통기성 필름에 융착되기 때문에, 종래와 같은 접착제를 도포하는 등의 공정이 삭감되어, 제조 코스트를 대폭 경감할 수 있다. 게다가 이 차량용 방음재는, 비통기성 필름의 열융착과 동시에 성형할 수 있으므로, 강성, 형상 유지성이 높아져, 복잡한 형상의 성형도 가능하게 하는 이점이 있다. In addition, according to the present invention, since the soundproofing material for a vehicle is molded into a required three-dimensional shape by heating and pressing, the heat-sealed film is melted and the sound-absorbing layer is fused to a non-breathable film. This can significantly reduce the manufacturing cost. In addition, since the vehicle soundproofing material can be molded simultaneously with the heat-sealing of the non-breathable film, there is an advantage that the rigidity and shape retention can be increased, and molding of a complicated shape is also possible.

(실시예 1)(Example 1)

이 실시예에서는, 상기 비통기성 필름(1)으로서 두께 15μ의 나일론 필름을 사용하고, 다층 인플레이션 성형에 의해 그 양면에 접착·적층되는 열융착 필 름(2a, 2b)으로서 두께 20μ의 폴리에틸렌 필름을 사용한다. 또, 일방의 흡음층(4a)으로서는 PET 펠트를 두께 3mm, 단위면적당 중량 500g/m2로 적층하고, 타방의 흡음층(4b)으로서는 PET 펠트를 두께 20mm, 단위면적당 중량 1000g/m2로 적층한다. 그리고 이것을 상기한 바와 같이 오븐(5)에 의해 50초간 가열한 후, 냉간성형 금형(7)에 의해 가압성형 한다. In this embodiment, a nylon film having a thickness of 15 µ is used as the non-breathable film 1, and a polyethylene film having a thickness of 20 µ is used as the heat-sealed films 2a and 2b bonded and laminated on both sides by multilayer inflation molding. use. As one sound absorbing layer 4a, PET felt was laminated at a thickness of 3 mm and a weight of 500 g / m 2 per unit area. As the other sound absorbing layer 4b, PET felt was laminated at a thickness of 20 mm and a weight of 1000 g / m 2 per unit area. do. Then, this is heated by the oven 5 for 50 seconds as described above, and then press-molded by the cold forming die 7.

이 차량용 방음재는, 도 6에 도시한 투과음 손실시험으로부터 차음성능, 도 7에 도시한 잔향실법 흡음율 시험으로부터 흡음성능을 각각 알 수 있는 바와 같이, 차음성능 및 흡음성능 모두 우수한 결과가 얻어졌다. 또한 동 도면 중, 흰 동그라미는 본 발명품의 차량용 방음재, 검은 동그라미는 본 발명품과의 비교를 위해 본 발명과 같은 중간층을 갖지 않고, 두께 3mm, 단위면적당 중량 1000g/m2의 PET 펠트층과 두께 20mm, 단위면적당 중량 1000g/m2의 PET 펠트층을 단지 적층하여 이루어지는 비교품의 데이터를 나타낸 것으로, 본 발명에 의하면, 이 비교품과 같은 방음재로 경량화 할 수 있음과 동시에, 음향성능도 동등 또는 그 이상의 방음 효과를 얻을 수 있는 것이 이 시험에 의해 확인되었다. 따라서, 본 발명에 따른 차량용 방음재를 대시 사일렌서로서 엔진 룸과의 경계에 사용할 수 있는 이외에, 차 실내 바닥면, 천장면 등에 부설함으로써, 소음을 흡수하여 차 실내를 보다 정숙하게 할 수 있다. As the sound insulation material for the vehicle has the sound insulation performance from the transmission sound loss test shown in Fig. 6 and the sound absorption performance from the reverberation chamber method sound absorption rate test shown in Fig. 7, respectively, excellent results were obtained for both the sound insulation performance and the sound absorption performance. In addition, in the figure, the white circle is a vehicle sound insulation material of the present invention, the black circle does not have an intermediate layer like the present invention for comparison with the present invention, a thickness of 3mm, a PET felt layer with a weight of 1000g / m 2 per unit area and a thickness of 20mm The data of the comparative product obtained by simply stacking a PET felt layer having a weight of 1000 g / m 2 per unit area are shown. According to the present invention, the soundproofing material can be reduced in the same soundproofing material as that of the comparative product, and the acoustic performance is equal or higher. The sound insulation effect was confirmed by this test. Therefore, in addition to being able to use the vehicle sound insulation material according to the present invention as a dash silencer at the boundary with the engine room, by installing the vehicle interior floor surface, ceiling surface, etc., it is possible to absorb noise and make the interior of the vehicle more quiet.

본 발명은 다층 인플레이션 성형에 의해 열융착 필름이 양면에 미리 접착·적층된 비통기성 필름을 중간층으로서 사용함으로써, 이것을 가열·가압하여 필욧한 입체 형상으로 성형함과 동시에 이 열융착 필름이 용융하여 흡음층이 이 비통기성 필름에 융착된다. 이 때문에 제조에 필요한 공정이 삭감되어, 제조 코스트가 경감된다. 또, 이렇게 하여 제조된 차량용 방음재는 경량이고, 얇은 동시에, 우수한 흡음성능, 차음성능이 얻어져 차 실내를 정숙하게 유지할 수 있다. The present invention uses a non-breathable film in which a heat-sealed film is previously bonded and laminated on both sides by multilayer inflation molding as an intermediate layer, thereby heating and pressing it to form a required three-dimensional shape, and at the same time, the heat-fused film melts and absorbs sound. The layer is fused to this non-breathable film. For this reason, the process required for manufacture is reduced and manufacturing cost is reduced. Moreover, the sound insulation material for vehicles manufactured in this way is lightweight, thin, and excellent sound absorption performance and sound insulation performance can be obtained, and it can maintain the interior of a car quietly.

Claims (5)

흡음층과 중간층과 흡음층으로 이루어지는 적층구조의 방음재로서, 중간층은 두께 7∼50μ이고 융점이 160∼250℃인 열가소성 수지 필름으로 이루어지는 비통기성 필름의 양면에 두께 7∼50μ이고 융점이 100∼130℃인 열가소성 수지 필름으로 이루어지는 열융착 필름을 다층 인플레이션 성형에 의해 접착·적층하여 이루어지고, 실내측이 되도록 차체에 붙여진 흡음층은 두께가 0.5∼15mm, 단위면적당 중량이 100∼2000g/m2인 섬유집합체이고, 실외측이 되도록 차체에 붙여진 흡음층은 두께가 5∼40mm, 단위면적당 중량이 500∼3000g/m2인 섬유집합체이고, 이 방음재를 오븐 내에 장입하고 열풍을 그 양면에 불어 대어 가열함으로써, 상기 열융착 필름을 용융시키고, 그 용융의 직후에 이 방음재를, 냉각수 파이프가 내장된 상형과, 성형면에 다수의 흡기구멍이 형성된 하형으로 이루어지는 냉간성형 금형에 이동시키고, 실내측이 되는 흡음층이 이 하형과 마주보도록 하여 이 방음재를 이 냉간성형 금형에 의해 가압함과 함께 이 흡기구멍에 의해 상기 비통기성 필름을 진공 흡인시키는 것에 의해, 상기 비통기성 필름의 양면에 양 흡음층을 용융시켜 이 방음재를 필요한 입체형상으로 성형하여 이루어지는 것을 특징으로 하는 차량용 방음재. A sound absorbing material having a laminated structure composed of a sound absorbing layer, an intermediate layer and a sound absorbing layer, wherein the intermediate layer has a thickness of 7 to 50 µ and a melting point of 100 to 130 on both sides of a non-breathable film made of a thermoplastic resin film having a thickness of 7 to 50 µ and a melting point of 160 to 250 ° C. The heat-sealing film made of a thermoplastic resin film of ° C is bonded and laminated by multilayer inflation molding, and the sound-absorbing layer attached to the vehicle body to be the indoor side has a thickness of 0.5 to 15 mm and a weight per unit area of 100 to 2000 g / m 2 . The sound absorbing layer, which is a fiber assembly and is attached to the vehicle body to be the outdoor side, is a fiber assembly having a thickness of 5 to 40 mm and a weight of 500 to 3000 g / m 2 per unit area. The sound insulation is charged into an oven and heated by blowing hot air on both sides thereof. By melt | dissolving the said heat-sealing film, the soundproofing material is formed in the upper mold | type which a cooling water pipe is built in, and many intake holes are formed in a shaping | molding surface immediately after the melting | fusing. It moves to the cold forming mold which consists of a lower mold | type, the sound-absorbing layer which becomes an indoor side faces this lower mold | type, pressurizes this soundproof material with this cold forming mold, and vacuum-absorbs the said non-breathable film by this suction hole. By melting both sound-absorbing layers on both sides of the non-breathable film, the soundproofing material is formed into a required three-dimensional shape. 제 1 항에 있어서, 섬유집합체는 펠트인 것을 특징으로 하는 차량용 방음재. The sound insulation material for a vehicle according to claim 1, wherein the fiber assembly is felt. 삭제delete 삭제delete 삭제delete
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JPH0985901A (en) * 1995-09-26 1997-03-31 Kurabo Ind Ltd Multilayered hot-melt film and laminate
JP2001347900A (en) * 2000-06-05 2001-12-18 Toyoda Spinning & Weaving Co Ltd Soundproofing material

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0985901A (en) * 1995-09-26 1997-03-31 Kurabo Ind Ltd Multilayered hot-melt film and laminate
JP2001347900A (en) * 2000-06-05 2001-12-18 Toyoda Spinning & Weaving Co Ltd Soundproofing material

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