KR100475872B1 - Soundproofing material for automobile and process of preparing the same - Google Patents

Soundproofing material for automobile and process of preparing the same Download PDF

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KR100475872B1
KR100475872B1 KR10-2002-0046927A KR20020046927A KR100475872B1 KR 100475872 B1 KR100475872 B1 KR 100475872B1 KR 20020046927 A KR20020046927 A KR 20020046927A KR 100475872 B1 KR100475872 B1 KR 100475872B1
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layer
sound insulation
noise
fiber
pet fiber
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KR20040013840A (en
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윤형준
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현대자동차주식회사
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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
    • B32B5/26—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 also being fibrous or filamentary
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • 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
    • B32B2307/102—Insulating
    • 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
    • B32B2605/08—Cars

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)

Abstract

본 발명은 자동차용 방음재와 그 제조방법에 관한 것으로서, 흡음재인 페트 파이버 섬유층 사이에 합성수지 필름을 삽입하여 흡음층에서는 소음을 흡수하고, 합성수지 필름층에서는 소음을 차단함으로써, 최종적으로 통과된 소음이 현저하게 감소되고, 그로인해 NVH 성능을 개선시킬 수 있는 새로운 자동차용 방음재와 그 제조방법에 관한 것이다. The present invention relates to a sound insulation material for automobiles and a method of manufacturing the same, by inserting a synthetic film between the PET fiber layer of the sound absorbing material to absorb noise in the sound absorbing layer, blocking the noise in the synthetic film layer, the final passing noise is remarkable The present invention relates to a novel automotive sound insulation and a method for manufacturing the same, which can be reduced, thereby improving NVH performance.

Description

자동차용 방음재와 그 제조방법{Soundproofing material for automobile and process of preparing the same} Soundproofing material for automobile and its manufacturing method {Soundproofing material for automobile and process of preparing the same}

본 발명은 자동차용 방음재와 그 제조방법에 관한 것으로서, 더욱 상세하게는 흡음재인 페트 파이버 섬유층 사이에 합성수지 필름을 삽입하여 흡음층에서는 소음을 흡수하고, 합성수지 필름층에서는 소음을 차단함으로써, 최종적으로 통과된 소음이 현저하게 감소되고, 그로인해 NVH 성능을 개선시킬 수 있는 새로운 자동차용 방음재와 그 제조방법에 관한 것이다. The present invention relates to a soundproofing material for automobiles and a method of manufacturing the same, and more particularly, by inserting a synthetic film between layers of PET fiber fibers, which are sound absorbing materials, absorbing noise in the sound absorbing layer, and blocking the noise in the synthetic film layer, thereby finally passing the result. The present invention relates to a new vehicle sound insulation material and a method of manufacturing the same, which can significantly reduce noise, thereby improving NVH performance.

일반적으로, 자동차 실내로 유입되는 소음을 막기 위해 여러 가지 다양한 방음재를 사용하고 있는 바, 상기 방음재는 차량에서 발생되는 주요 주파수인 500 ~ 2500Hz 영역의 소음을 감소 시키는 역할을 한다. In general, a variety of sound insulation materials are used to prevent noise flowing into a vehicle interior, and the sound insulation materials reduce noise in a region of 500 to 2500 Hz, which is a main frequency generated in a vehicle.

특히, 자동차용 방음재가 사용되는 주요부분은 소음이 가장 많이 유입되는 대쉬 패널, 플로워, 루프, 트렁크 등이며, 여기에 사용되는 재료 또한 펠트(Felt)류, 유리 섬유(Glass Fiber)류, 폴리우레탄 폼 등이 다양하게 사용되고 있다.In particular, the main parts used for sound insulation materials for automobiles are dash panels, floors, roofs, trunks, etc., where noise is introduced most, and materials used here include felts, glass fibers, and polyurethanes. Foam is used in various ways.

기존에는 레진 펠트(Resin Felt)가 값이 저렴하여 많이 사용되었으나, 점차 성능면에서 유리한 퍼폼(pur foam)이 많이 사용되는 추세이다. Conventional resin felt (Resin Felt) has been used a lot because of the low cost, but gradually a lot of performance is advantageous in terms of performance (pur foam).

그러나, 퍼폼(pur foam)이 성능과 디자인 자유도 면에서 유리하기는 하나, 재활용성이 불가능하며, 냄새 문제로 인하여 요즈음에는 페트 파이버(pet fiber) 재료를 사용하는 경향이 늘어나고 있다.However, although foam is advantageous in terms of performance and design freedom, it is not recyclable, and due to odor problems, there is an increasing tendency to use pet fiber materials these days.

한편, 상기 방음재는 차량의 적용 위치에 따라 다양한 방법을 갖게 되는데, 일반적으로 소음을 감소시키기 위한 효과적인 방법으로는 흡음재와 차음재를 조합하는 이중 구조를 이용하는 방법이 있다. On the other hand, the sound insulation material has a variety of methods according to the application location of the vehicle, generally, as an effective method for reducing the noise there is a method using a dual structure combining the sound absorbing material and sound insulation material.

여기서, 이중 구조란 밀도가 다른 흡음재와 차음재를 조합하여 사용하는 방법으로서, 소음 유입이 많은 대쉬 패널, 플로워, 루프, 트렁크 부위는 NVH 성능을 높이기 위해 적용하고 있는 추세이다. Here, the dual structure is a method of using a sound absorbing material and a sound insulating material having different densities, and a dash panel, a floor, a loop, and a trunk portion having a lot of noise inflows are being applied to improve NVH performance.

하지만, 적용 위치에 따라 흡음재만 단독으로 사용되는 경우도 있다. (엔진룸 쪽 대쉬 패널, 루프 등)However, depending on the application position, only the sound absorbing material may be used alone. (Dash panel on engine room side, roof, etc.)

현재 가장 많이 사용되고 있는 흡음재와 차음재의 조합은, 상기 흡음재로써, 퍼폼 또는 페트 파이버를 이용하고, 차음재로는 에바 시트(EVA SHEET)가 사용되고 있으나, 환경 문제와 경량화 측면에서 유리한 재료 사용이 증가하면서 흡음재도 재활용성이 가능하고 성능이 우수한 페트 파이버를 사용하고 있는 추세이다. The most widely used sound absorbing material and sound insulating material is the sound absorbing material, using a foam or PET fiber, EVA sheet (EVA SHEET) is used as the sound absorbing material, but in terms of environmental problems and lightweight, the sound absorbing material is increasing The trend is to use PET fibers that are recyclable and have good performance.

하지만, 차음재는 기존의 헤비 레이어(heavy layer)가 일반적으로 사용되고 있다. However, the sound insulation material is a conventional heavy layer (heavy layer) is generally used.

요즈음에는 자동차에 사용되는 방음재는 경량화 측면에서 2중 구조인 흡음재와 차음재의 조합형에서 흡음재 단독으로 사용되는 경향이 증가되고 있다. In recent years, in terms of weight reduction, the sound insulation material used in automobiles has been increasing as a sound absorbing material alone in a combination of a sound absorbing material and a sound insulating material having a double structure.

그렇지만, 차량으로 유입되는 소음을 차단하기 위하여 흡음재가 단독으로 사용되는 경우는 NVH 성능 향상에 미흡한 수준이며, 구조적인 문제도 있다. However, when the sound absorbing material is used alone to block the noise flowing into the vehicle is insufficient to improve the NVH performance, there is also a structural problem.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위해 안출한 것으로서, 페트 파이버 섬유층인 흡음층에서는 소음을 흡수하고, 중간의 합성수지 필름층에서는 소음을 차단하는 2중의 방음수단을 구비하여 최종적으로 방음재를 통과한 소음을 현저하게 감소시키고, 30 ~ 50%의 NVH 성능을 향상시키며, 각종 복잡한 공정을 추가하는 대신에 필름을 삽입하는 단순한 공정만을 추가하여 공정의 축소를 이룰 수 있을 뿐만 아니라, 방음재의 경량화가 가능하고, 페트 파이버 재료와 합성수지 필름이 사용되어 동일 계열의 재료사용으로 폐차 처리 시, 분리 과정없이 재활용이 가능한 새로운 자동차용 방음재와 그 제조방법을 제공하는데 그 목적이 있다. Therefore, the present invention has been made in order to solve the above problems, the sound absorbing material is finally provided with a double sound insulation means for absorbing noise in the sound absorbing layer of the PET fiber fibers layer, and blocks the noise in the intermediate synthetic resin film layer. Significantly reduces noise passing through, improves NVH performance by 30-50%, reduces the process by adding a simple process of inserting a film instead of adding complex processes, and reduces the weight of soundproof materials. The purpose is to provide a new vehicle sound insulation material and a method for manufacturing the same, which can be recycled without the separation process when using the same series of materials using a PET fiber material and a synthetic film.

이하, 상기와 같은 목적을 달성하기 위한 본 발명의 특징에 대해 설명하면 다음과 같다. Hereinafter, the features of the present invention for achieving the above object are as follows.

본 발명에 따른 자동차용 방음재(10)는 20mm의 두께를 가진 흡음재인 페트 파이버(pet fiber) 섬유층(11)의 중간 위치에 길이방향으로 40 ~ 100㎛ 두께를 가진 합성수지 필름층(12)이 삽입된 것을 특징으로 한다. Automotive sound insulation material 10 according to the present invention is inserted into the synthetic resin film layer 12 having a thickness of 40 ~ 100㎛ in the longitudinal direction in the middle position of the PET fiber (pet fiber) fiber layer 11 is a sound absorbing material having a thickness of 20mm It is characterized by.

특히, 상기 페트 파이버 섬유층(11)은 레귤러 섬유(regular fiber), 50 ~ 80 중량부 및 저융점 섬유(low melting fiber : LMF) ,20 ~ 50 중량부에 각종 첨가제, 2 ~ 7 중량부가 함유된 것을 특징으로 한다. In particular, the PET fiber fiber layer 11 is a regular fiber, 50 to 80 parts by weight and low melting fiber (LMF), 20 to 50 parts by weight of various additives, 2 to 7 parts by weight It is characterized by.

이와 같은 본 발명에 따른 새로운 자동차용 방음재를 제조하기 위한 방법을 살펴보면, 녹는점이 100 ~ 125℃인 합성수지 필름층(12)을 두께가 400mm인 페트 파이버(pet fiber) 섬유층(10) 사이에 위치되는 단계와;Looking at the method for manufacturing a new automotive sound insulation according to the present invention, the synthetic resin film layer 12 having a melting point of 100 ~ 125 ℃ is located between the pet fiber (pet fiber) fiber layer 10 having a thickness of 400mm Steps;

상기 합성수지 필름층(12)이 삽입된 페트 파이버 섬유층(11)을 200℃에서 30초 동안 예열실을 통해 통과시키는 단계와;Passing the PET fiber fiber layer 11 into which the synthetic resin film layer 12 is inserted through a preheating chamber at 200 ° C. for 30 seconds;

상기 합성수지 필름층(12)이 삽입된 페트 파이버 섬유층(11)의 두께를 20mm로 압축 성형하는 단계로 이루어진 것을 특징으로 한다. Compression molding the thickness of the PET fiber fiber layer 11 is inserted into the synthetic resin film layer 12 is characterized in that consisting of a step.

이하, 첨부도면을 참조하여 본 발명의 구성에 대해 상세하게 설명하면 다음과 같다. Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

도 1은 본 발명에 따른 자동차용 방음재의 구조를 나타내는 개략도이고, 도 2는 본 발명에 따른 자동차용 방음재의 제조공정을 나타내는 공정도이다. 1 is a schematic diagram showing the structure of a vehicle sound insulation material according to the present invention, Figure 2 is a process chart showing a manufacturing process of the vehicle sound insulation material according to the present invention.

본 발명에 따른 자동차용 방음재(10)의 구조는 도 1에 도시된 바와 같이, 20mm의 두께를 가진 흡음재인 페트 파이버(pet fiber) 섬유층(11)의 중간 위치에 길이방향으로 40 ~ 100㎛ 두께를 가진 합성수지 필름층(12)이 삽입되어 있는데, 이때 일반적으로 많이 사용되는 상기 페트 파이버 섬유층(11)은 레귤러 섬유(regular fiber), 50 ~ 80 중량부 및 저융점 섬유(low melting fiber : LMF) , 20 ~ 50 중량부에 각종 첨가제, 2 ~ 7 중량부가 함유된 것으로서, 상기 레귤러 섬유와 저융점 섬유가 혼합 방사되어 사용되고 있다. As shown in FIG. 1, the sound insulation material 10 for automobiles according to the present invention has a thickness of 40 to 100 μm in a longitudinal direction at an intermediate position of a pet fiber fiber layer 11, which is a sound absorbing material having a thickness of 20 mm. The synthetic resin film layer 12 is inserted, wherein the PET fiber fiber layer 11 which is generally used is regular fiber, 50 to 80 parts by weight and low melting fiber (LMF) , 20 to 50 parts by weight of various additives and 2 to 7 parts by weight, the regular fibers and low melting point fibers are mixed and used.

이러한 구조로 이루어진 본 발명에 따른 자동차용 방음재(10)의 제조공정은 도 2에 도시된 바와 같이, 녹는점이 100 ~ 125℃인 합성수지 필름층(12)을 두께가 400mm인 페트 파이버(pet fiber) 섬유층(11) 사이에 위치시킨 후, 200℃에서 30초 동안 예열실을 통과시켜 그 열에 의해 저융점 섬유가 녹아서 레귤러 섬유에 결속되도록 한다. In the manufacturing process of the sound insulation material 10 for automobiles according to the present invention having such a structure, as shown in Figure 2, the synthetic resin film layer 12 having a melting point of 100 ~ 125 ℃ PET fiber (pet fiber) having a thickness of 400mm After being placed between the fibrous layers 11, the preheating chamber is passed through the preheating chamber at 200 ° C. for 30 seconds so that the low melting fibers are melted by the heat and bound to the regular fibers.

또한, 상기 페트파이버 섬유층(11)의 중간에 삽입된 합성수지 필름층(12)이 예열 중(200도, 30초) 녹아서 그 페트 파이버 섬유층(11)에 하나의 막을 형성되도록 하는 바, 상기 막은 두 페트 파이버 섬유층(11)을 접착시킬 뿐만 아니라, 차음 역할을 한다. In addition, the synthetic resin film layer 12 inserted in the middle of the PET fiber fiber layer 11 is melted during preheating (200 degrees, 30 seconds) to form a film on the PET fiber layer 11, the film is two In addition to adhering the PET fiber layer 11, it serves as sound insulation.

이후, 금형에서 상기 방음재(10)의 두께를 20mm로 압축 성형하여 일체형의 흡음재가 되도록 한다. Then, the compression-molding of the thickness of the soundproof material 10 to 20mm in a mold to be an integrated sound absorbing material.

이때, 합성수지 필름층(12)은 일반적으로 LDPE 필름을 사용하는 것이 바람직하다. At this time, it is preferable that the synthetic resin film layer 12 generally use an LDPE film.

또한, MVH 요구 성능 및 특성에 따라 합성수지 필름층(12)의 두께는 다양하게 변경할 수 있다. In addition, the thickness of the synthetic resin film layer 12 may be variously changed according to MVH required performance and characteristics.

따라서, 본 발명에 따른 자동차용 방음재는 자동차의 실내로 유입되는 소음을 이중의 페트 파이버 섬유층(11)에서 2중으로 반사하거나 흡수하고, 합성수지 필름층(12)에서 소음을 차단하여 NVH 성능을 향상시킬 수 있는 발명인 것이다. Therefore, the sound insulation material for automobiles according to the present invention reflects or absorbs the noise introduced into the interior of the vehicle in double in the double fiber optic fiber layer 11 and blocks the noise in the synthetic resin film layer 12 to improve NVH performance. It is an invention that can be.

상술한 바와 같이, 본 발명에 따르면, 페트 파이버 섬유층인 흡음층에서는 소음을 흡수하고, 중간의 합성수지 필름층에서는 소음을 차단하는 2중의 방음수단을 구비하여 최종적으로 방음재를 통과한 소음을 현저하게 감소시키고, 30 ~ 50%의 NVH 성능을 향상시키며, 각종 복잡한 공정을 추가하는 대신에 필름을 삽입하는 단순한 공정만을 추가하므로 공정의 축소를 이룰 수 있을 뿐만 아니라, 방음재의 경량화가 가능하고, 페트 파이버 재료와 합성수지 필름이 사용되어 동일계열의 재료사용으로 폐차 처리 시, 분리 과정없이 재활용이 가능한 효과가 있다. As described above, according to the present invention, the sound absorbing layer, which is a PET fiber fiber layer, absorbs noise, and the intermediate synthetic resin film layer has double sound insulation means for blocking the noise. To improve the NVH performance of 30 to 50%, and to add a simple process of inserting a film instead of adding various complicated processes, not only can the process be reduced, but also the weight of the soundproof material can be reduced, and the PET fiber material And synthetic resin film is used, the same series of materials used in the disposal of waste cars, there is an effect that can be recycled without separation process.

도 1은 본 발명에 따른 자동차용 방음재의 구조를 나타내는 개략도이고, 1 is a schematic view showing the structure of a sound insulation material for automobiles according to the present invention,

도 2는 본 발명에 따른 자동차용 방음재의 제조공정을 나타내는 공정도이다. 2 is a process chart showing a manufacturing process of the sound insulation material for automobiles according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 방음재 11 : 페트 파이버(pet fiber) 섬유층10: sound insulation material 11: pet fiber fiber layer

12 : 합성수지 필름층12: synthetic resin film layer

Claims (3)

삭제delete 삭제delete 녹는점이 100 ~ 125℃인 합성수지 필름층(12)을 두께가 400mm인 페트 파이버(pet fiber) 섬유층(10) 사이에 위치되는 단계와;Placing the synthetic resin film layer 12 having a melting point of 100 to 125 ° C. between the pet fiber layer 10 having a thickness of 400 mm; 상기 합성수지 필름층(12)이 삽입된 페트 파이버 섬유층(11)을 200℃에서 30초 동안 예열실을 통해 통과시키는 단계와;Passing the PET fiber fiber layer 11 into which the synthetic resin film layer 12 is inserted through a preheating chamber at 200 ° C. for 30 seconds; 상기 합성수지 필름층(12)이 삽입된 페트 파이버 섬유층(11)의 두께를 20mm로 압축 성형하는 단계로 이루어진 것을 특징으로 하는 자동차용 방음재의 제조방법.Method of manufacturing a sound insulation material for a vehicle, characterized in that the synthetic resin film layer 12 is a step of compression molding the thickness of the PET fiber fiber layer 11 is inserted into 20mm.
KR10-2002-0046927A 2002-08-08 2002-08-08 Soundproofing material for automobile and process of preparing the same Expired - Fee Related KR100475872B1 (en)

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