KR20230001186A - Multiple layer noise absorbing material for vehicle - Google Patents

Multiple layer noise absorbing material for vehicle Download PDF

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Publication number
KR20230001186A
KR20230001186A KR1020210083806A KR20210083806A KR20230001186A KR 20230001186 A KR20230001186 A KR 20230001186A KR 1020210083806 A KR1020210083806 A KR 1020210083806A KR 20210083806 A KR20210083806 A KR 20210083806A KR 20230001186 A KR20230001186 A KR 20230001186A
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South Korea
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absorbing material
sound
polyurethane foam
thickness
sound absorbing
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KR1020210083806A
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Korean (ko)
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권충호
정종화
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(주)대한솔루션
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Priority to KR1020210083806A priority Critical patent/KR20230001186A/en
Publication of KR20230001186A publication Critical patent/KR20230001186A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/02Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/066Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/067Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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 structural features of a fibrous or filamentary layer
    • B32B5/022Non-woven fabric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/18Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/02Organic
    • B32B2266/0214Materials belonging to B32B27/00
    • B32B2266/0278Polyurethane
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102Insulating

Abstract

Provided is a multilayer sound-absorbing material for a vehicle, wherein polyurethane foam and glass fiber layers are stacked in the same thickness as that of the polyurethane foam constituting a conventional multilayer sound-absorbing material, so that the sound absorption performance is improved while the weight is reduced by about 10%, compared to only polyurethane foam. In particular, provided is a multilayer sound-absorbing material for a vehicle, which is produced with polyurethane foam and glass fiber layers with a thickness of 20 to 30 mm to minimize the overall thickness of the multilayer sound-absorbing material while improving formability and sound-absorbing performance and reducing weight. In addition, the thickness ratio of the polyurethane foam to the glass fiber layer is set to be 0.2:0.8 to 0.8:0.2, so that a thickness ratio that suits formability, functionality, and sound absorption performance can be selected for use.

Description

자동차용 다층 흡음재{MULTIPLE LAYER NOISE ABSORBING MATERIAL FOR VEHICLE}Multilayer sound absorbing material for automobile {MULTIPLE LAYER NOISE ABSORBING MATERIAL FOR VEHICLE}

본 발명은 자동차용 다층 흡음재에 관한 것으로, 더욱 상세하게는 다층 구조 중 종래 폴리우레탄의 두께만큼 폴리우레탄과 유리 섬유층을 일체로 구성하여 흡음재를 구성함으로써, 기존 다층 흡음재와 같은 두께로 이루어지면서도 흡음 성능을 높이고, 동시에 전체 중량을 10% 정도 줄일 수 있게 한 것이다.The present invention relates to a multi-layered sound-absorbing material for automobiles, and more particularly, by constituting a sound-absorbing material by integrally configuring a polyurethane and a glass fiber layer as thick as the thickness of the conventional polyurethane among multi-layered structures, sound absorbing while having the same thickness as the existing multi-layered sound absorbing material. It improves performance and at the same time reduces the overall weight by about 10%.

일반적으로 자동차에는 자동차 구성에서 발생하는 소음이나 외부에서 자동차 안이나 실내로 들어오는 소음, 그리고 자동차 하부의 노면에서 유입하는 소음을 줄이려고 다양한 흡음재가 사용된다. 상기 흡음재에는, [도 1]과 같이, 후드(B), 헤드라이너(H), 러기지 트레이(T), 그리고 트렁크 플로어(F) 등 자동차 곳곳에서 이용된다. 이러한 흡음재는 흡음 성능을 개선하려고, 아래의 (특허문헌 1) 내지 (특허문헌 3)과 같이, 다양한 층 구조로 이루어진 흡음재를 사용한다.BACKGROUND ART In general, various sound-absorbing materials are used in automobiles to reduce noise generated from components of the automobile, noise entering the interior or interior of the automobile from the outside, and noise introduced from a road surface under the automobile. As shown in FIG. 1, the sound absorbing material is used throughout the vehicle, such as the hood (B), the headliner (H), the luggage tray (T), and the trunk floor (F). In order to improve the sound absorbing performance of these sound absorbing materials, sound absorbing materials made of various layer structures are used, as shown in (Patent Document 1) to (Patent Document 3) below.

(특허문헌 1) 한국등록특허 제10-2140941호(Patent Document 1) Korea Patent Registration No. 10-2140941

폴리우레탄 흡음재를 발포 성형할 때 에어로겔 파우더를 첨가함으로써, 단열성과 경량화 소재로 잘 알려진 에어로겔을 통해 중량 증가를 최소화하면서도 단열 효과를 높일 수 있게 한 자동차용 폴리우레탄 흡음재 제조방법 및 그 폴리우레탄 흡음재를 제공하는 데 그 목적이 있다. 특히, 에어로겔을 미리 폴리올에 혼합하여 마스터 배치 원액을 제조하고, 여기에 폴리올을 추가하여 농도를 조절한 다음 MDI(Methylene Diphenyl Diisocyanate)를 혼합하여 발포할 수 있게 구성하므로, 에어로겔의 농도 조절을 쉽게 하면서도 분산 효과를 높여 균질한 흡차음 성능을 얻을 수 있게 한 자동차용 폴리우레탄 흡음재 제조방법 및 그 폴리우레탄 흡음재를 제공하는 데 다른 목적이 있다.Provision of a method for manufacturing a polyurethane sound-absorbing material for automobiles, in which airgel powder, which is well known as a heat-insulating and lightweight material, can be minimized while increasing the insulation effect by adding airgel powder when foaming and molding polyurethane sound-absorbing material, and providing the polyurethane sound-absorbing material Its purpose is to In particular, airgel is mixed with polyol in advance to prepare a master batch stock solution, and polyol is added to adjust the concentration, and then MDI (Methylene Diphenyl Diisocyanate) is mixed to foam. Another object is to provide a method for manufacturing a polyurethane sound absorbing material for automobiles capable of obtaining homogeneous sound absorbing and insulating performance by increasing the dispersion effect, and to provide the polyurethane sound absorbing material.

(특허문헌 2) 한국등록특허 제10-1549060호(Patent Document 2) Korean Patent Registration No. 10-1549060

본 극세사를 이용한 자동차용 흡음재의 제조방법에 관한 것으로, 극세사 흡음층을 제조하는 극세사 흡음층 제조단계, 상기 극세사 흡음층의 상부 면에 융점이 140℃ 이하인 저융점 고분자 수지로 이루어진 접착층을 형성하는 접착층 형성 단계, 면밀도가 100 내지 2400g/㎡인 펠트흡음층을 제조하는 펠트흡음층 제조단계, 상기 극세사 흡음층의 상부 면에 형성된 접착층에 상기 펠트흡음층 제조단계를 통해 제조된 펠트흡음층을 적층하는 적층단계, 상기 적층단계를 통해 적층된 적층체에 형성된 펠트흡음층의 상부 면에 차음층을 형성하는 차음층 형성단계, 상기 차음층 형성단계를 통해 제조된 적층체를 금형에 투입하고 성형하는 성형단계 및 상기 성형단계를 통해 성형된 성형물의 상부 면에 합성수지를 발포하여 소프트층을 형성하는 발포소프트층 형성단계로 이루어진다. 상기의 방법을 통해 제조되는 극세사 흡음층이 형성된 자동차용 흡음재는 중량을 증가시키지 않고도 자동차의 실내로 유입되는 소음과 자동차의 실내에서 발생하는 소음을 흡수하여 저감시키는 효과를 나타낸다.It relates to a method for manufacturing a sound-absorbing material for automobiles using the present microfiber, a microfiber sound-absorbing layer manufacturing step of manufacturing a microfiber sound-absorbing layer, and an adhesive layer forming an adhesive layer made of a low-melting polymer resin having a melting point of 140 ° C or less on the upper surface of the microfiber sound-absorbing layer. A forming step, a felt sound-absorbing layer manufacturing step of manufacturing a felt sound-absorbing layer having an areal density of 100 to 2400 g / m 2, and an adhesive layer formed on the upper surface of the microfiber sound-absorbing layer. Laminating the felt sound-absorbing layer prepared through the felt sound-absorbing layer manufacturing step Lamination step, sound insulation layer forming step of forming a sound insulation layer on the upper surface of the felt sound-absorbing layer formed on the laminated body through the layering step, molding of putting the laminate manufactured through the sound insulation layer forming step into a mold and molding it and a foamed soft layer forming step of forming a soft layer by foaming a synthetic resin on the upper surface of the molding formed through the molding step. The sound-absorbing material for automobiles having a microfiber sound-absorbing layer manufactured through the above method exhibits an effect of absorbing and reducing noise introduced into the interior of the car and noise generated from the interior of the car without increasing the weight.

(특허문헌 3) 한국등록특허 제10-1601658호(Patent Document 3) Korea Patent Registration No. 10-1601658

2개의 흡음 층 사이에 흡음재의 강성을 보완할 수 있는 강성보강 층을 구성하되, 이 강성보강 층에 구멍이나 격자를 형성함으로써, 기본적으로 흡음재의 강성 보완을 통해 흡음재에 반복적인 하중이 가해지더라도 흡음재가 꺼지거나 눌리는 것을 방지하여 흡음재의 품질을 높이고, 특히 구멍이나 격자를 형성한 만큼 강성보강 층의 중량을 줄여 자동차 연비를 높이며, 또한 구멍이나 격자를 통과한 소음이 이웃한 흡음 층을 통해 2번에 걸쳐 흡음이 이루어지게 하여 흡음 성능을 높일 수 있게 한 자동차의 플로어 카펫용 흡음재를 제공하는 데 그 목적이 있다. 특히, 강성보강 층으로 얇은 두께로도 높은 강성과 유연성 그리고 내충격성과 차음성까지 갖춘 친환경 소재인 발포 폴리프로필렌(EPP)를 이용함으로써, 이처럼 운전자와 탑승자의 발부분을 통해 전달된 반복 하중에도 충분히 견딜 수 있을 뿐만 아니라 구멍이나 격자를 통해 2개의 흡음 층을 통해 2번에 걸친 흡음 효과를 얻을 수 있을 뿐만 아니라 중량 감소를 통해 연비를 높일 수 있게 한 자동차의 플로어 카펫용 흡음재를 제공하는 데 다른 목적이 있다.A rigidity reinforcing layer capable of supplementing the rigidity of the sound absorbing material is formed between the two sound absorbing layers, but by forming holes or lattices in the rigidity reinforcing layer, the sound absorbing material is basically supplemented with the rigidity of the sound absorbing material, even if repeated loads are applied to the sound absorbing material. is prevented from being turned off or pressed to improve the quality of the sound-absorbing material, especially by reducing the weight of the rigid reinforcing layer as much as the holes or grids are formed to increase automobile fuel efficiency, and noise passing through the holes or grids is doubled through the adjacent sound-absorbing layer. An object of the present invention is to provide a sound absorbing material for a floor carpet of a vehicle capable of improving sound absorbing performance by absorbing sound over the surface. In particular, by using expanded polypropylene (EPP), an eco-friendly material with high stiffness and flexibility even with a thin thickness as a rigidity reinforcing layer, as well as impact resistance and sound insulation, it can sufficiently withstand repeated loads transmitted through the feet of the driver and passengers. Another object is to provide a sound absorbing material for a floor carpet of a car that not only can obtain a sound absorption effect twice through two sound absorbing layers through holes or grids, but also can increase fuel efficiency through weight reduction. there is.

이러한 기존의 다층 흡음재 중에서, [도 2]와 같이, 두 장의 부직포(2) 사이에 폴리우레탄 폼(1)이 삽입되어 일체로 이루어진 다층 흡음재는 다음과 같은 문제가 발생한다.Among these existing multi-layer sound absorbing materials, as shown in [Fig. 2], the polyurethane foam 1 is inserted between two sheets of nonwoven fabric 2 to form a multi-layer sound absorbing material integrally formed with the following problems.

(1) 주로 폴리우레탄 폼을 이용하여 흡음 성능을 얻음에 따라 흡음 성능을 높이려면 폴리우레탄 폼의 두께가 두꺼워져야 한다.(1) As sound absorption performance is obtained mainly by using polyurethane foam, the thickness of polyurethane foam should be increased to increase sound absorption performance.

(2) 이는, 폴리우레탄 폼의 두께가 두꺼울수록 흡음 성능을 높일 수 있으나, 그만큼 다층 흡음재의 중량도 늘어나게 된다.(2) This is, as the thickness of the polyurethane foam increases, the sound absorption performance can be increased, but the weight of the multi-layered sound absorption material also increases accordingly.

(3) 다층 흡음재의 중량은 자동차 전체의 중량에도 영향을 주게 되는바, 자동차의 연비를 떨어뜨리는 한 가지 요인으로 작용한다.(3) The weight of the multi-layered sound-absorbing material also affects the weight of the vehicle as a whole, and acts as a factor in reducing the fuel efficiency of the vehicle.

(4) 한편, 자동차는 공간 활용에 한계가 있음으로, 다층 흡음재의 두께가 두꺼워질수록 다른 부품을 장착할 수 있는 공간을 확보할 수 없다. 이에, 다층 흡음재의 두께를 두껍게 제작하는데도 한계가 있다.(4) On the other hand, since there is a limitation in space utilization in automobiles, as the thickness of the multi-layer sound absorbing material increases, it is impossible to secure a space for mounting other parts. Thus, there is a limit to manufacturing the thickness of the multi-layer sound absorbing material thick.

(5) 따라서, 다층 흡음재가 자동차 실내나 엔진룸 그리고 트렁크 안으로 튀어나옴에 따라 그만큼 공간을 사용할 수 없게 된다.(5) Therefore, as the multi-layer sound absorbing material protrudes into the interior of the vehicle, the engine room, and the trunk, the space becomes unusable.

한국등록특허 제10-2140941호 (등록일: 2020.07.29)Korean Patent Registration No. 10-2140941 (registration date: 2020.07.29) 한국등록특허 제10-1549060호 (등록일: 2015.08.26)Korean Patent Registration No. 10-1549060 (registration date: 2015.08.26) 한국등록특허 제10-1601658호 (등록일: 2016.03.03)Korean Patent Registration No. 10-1601658 (registration date: 2016.03.03)

본 발명은 이러한 점을 고려한 것으로, 폴리우레탄 폼과 유리 섬유층을 적층하되, 기존 다층 흡음재를 구성하는 폴리우레탄 폼과 같은 두께로 적층함으로써, 폴리우레탄 폼으로만 이루어진 것과 비교하여 10% 정도의 중량 감소를 보이면서도 흡음 성능을 개선할 수 있게 한 자동차용 다층 흡음재를 제공하는데 그 목적이 있다.The present invention takes this into account, and the polyurethane foam and the glass fiber layer are laminated to the same thickness as the polyurethane foam constituting the existing multi-layer sound absorbing material, thereby reducing the weight by about 10% compared to the polyurethane foam only. Its purpose is to provide a multilayer sound absorbing material for automobiles capable of improving sound absorbing performance while showing.

특히, 본 발명은 폴리우레탄 폼과 유리 섬유층으로 이루어진 두께가 20~30㎜로 제작함으로써, 다층 흡음재의 전체 두께가 두꺼워지는 것을 최소화하면서도 성형성과 흡음 성능 개선과 중량 감소 효과를 함께 얻을 수 있게 한 자동차용 다층 흡음재를 제공하는데 다른 목적이 있다.In particular, the present invention is made of polyurethane foam and a glass fiber layer with a thickness of 20 to 30 mm, thereby minimizing the overall thickness of the multi-layer sound absorbing material, while improving formability and sound absorption performance and reducing weight. Another object is to provide a multi-layer sound absorbing material for use.

또한, 본 발명은 폴리우레탄 폼: 유리 섬유층의 두께 비율이 (0.2~0.8) : (0.2~0.8)로 이루어지게 함으로써, 성형성과 기능성 그리고 흡음 성능에 맞는 두께 비를 선택해서 이용할 수 있게 한 자동차용 다층 흡음재를 제공하는데 또 다른 목적이 있다.In addition, the present invention is made of polyurethane foam: glass fiber layer thickness ratio (0.2 ~ 0.8): (0.2 ~ 0.8), so that the thickness ratio suitable for formability, functionality and sound absorption performance can be selected and used for automobiles Another object is to provide a multi-layer sound absorbing material.

이러한 목적을 달성하기 위한 본 발명에 따른 자동차용 다층 흡음재는, 서로 마주하는 두 개의 부직포(12) 사이에 소정의 두께(T)를 가진 폴리우레탄 폼(1)이 일체로 이루어진 자동차용 다층 흡음재에서, 부직포(12) 사이에는, 폴리우레탄 폼(10)과 유리 섬유층(11)이 두께(T)만큼 겹쳐져서 이루어진 것을 특징으로 한다.The multilayer sound absorbing material for automobiles according to the present invention for achieving this object is a multilayer sound absorbing material for automobiles in which polyurethane foam 1 having a predetermined thickness T is integrally formed between two nonwoven fabrics 12 facing each other. , Between the non-woven fabric 12, it is characterized in that the polyurethane foam 10 and the glass fiber layer 11 are overlapped by a thickness (T).

특히, 상기 두께(T)는, 20~30㎜인 것을 특징으로 한다.In particular, the thickness (T) is characterized in that 20 ~ 30 mm.

또한, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)은, 두께 비율이 (0.2~0.8) : (0.2~0.8)인 것을 특징으로 한다.In addition, the polyurethane foam 10 and the glass fiber layer 11 are characterized in that the thickness ratio is (0.2 to 0.8) : (0.2 to 0.8).

마지막으로, 본 발명에 따른 자동차용 다층 흡음재는 두 개의 부직포(12) 사이에 소정의 두께(T)를 가진 폴리우레탄 폼(1)이 일체로 이루어진 자동차용 흡음재보다 8~12% 중량이 적은 것을 특징으로 한다.Finally, the multilayer sound absorbing material for automobiles according to the present invention is 8 to 12% less in weight than the sound absorbing material for automobiles in which the polyurethane foam (1) having a predetermined thickness (T) between two nonwoven fabrics (12) is integrally formed. to be characterized

본 발명에 따른 자동차용 다층 흡음재는 다음과 같은 효과가 있다.The multilayer sound absorbing material for automobiles according to the present invention has the following effects.

(1) 폴리우레탄 폼과 유리 섬유층을 적층하여 기존 다층 흡음재의 폴리우레탄 두께로 형성함에 따라 기존 다층 흡음재보다 우수한 흡음 성능이 우수한 다층 흡음재를 얻을 수 있다.(1) By laminating polyurethane foam and a glass fiber layer to form a polyurethane thickness of an existing multi-layer sound absorbing material, it is possible to obtain a multi-layer sound absorbing material having excellent sound absorbing performance compared to the existing multi-layer sound absorbing material.

(2) 또한, 유리 섬유층은 폴리우레탄 폼보다 가벼워서 이처럼 같은 두께로 제작했을 때, 기존 다층 흡음재와 비교하여 10% 정도 중량 감소 효과를 기대할 수 있다.(2) In addition, since the glass fiber layer is lighter than polyurethane foam, a weight reduction effect of about 10% can be expected compared to conventional multi-layered sound absorbing materials when manufactured with the same thickness.

(3) 이처럼 다층 흡음재의 중량 감소는 자동차의 전체 중량을 줄일 수 있어 자동차 연비를 개선할 수 있다.(3) The reduction in the weight of the multi-layer sound absorbing material can reduce the overall weight of the vehicle, thereby improving the fuel efficiency of the vehicle.

(4) 폴리우레탄 폼과 유리 섬유층의 두께가 기존 폴리우레탄 폼과 같은 두께로 제작됨으로, 본 발명에 따른 다층 흡음재를 장착할 때 다른 구성과 간섭이 생기지 않을 뿐만 아니라 장착을 위해 다시 설계를 하지 않아도 되어 제작과 조립에도 편리하다.(4) Since the thickness of the polyurethane foam and the glass fiber layer is the same as that of the existing polyurethane foam, when the multi-layered sound absorbing material according to the present invention is mounted, interference with other configurations does not occur, and there is no need to redesign for mounting. It is easy to manufacture and assemble.

(5) 한편, 폴리우레탄 폼과 유리 섬유층은 그 두께 비율을 (0.2~0.8) : (0.2~0.8)로 제작함으로써, 성형성과 기능성 그리고 전체 중량 등을 고려하여 흡음 성능에 맞춰 폴리우레탄 폼과 유리 섬유층의 두께 비율을 다양하게 조절해서 제작할 수 있다.(5) On the other hand, polyurethane foam and glass fiber layer are manufactured with a thickness ratio of (0.2~0.8) : (0.2~0.8), considering moldability, functionality, and overall weight, polyurethane foam and glass according to sound absorption performance. It can be manufactured by adjusting the thickness ratio of the fiber layer in various ways.

(6) 이때, 상기 폴리우레탄 폼과 유리 섬유층의 두께를 20~30㎜로 제작함으로써, 두께와 더불어 이 두께를 바탕으로 폴리우레탄 폼과 유리 섬유층의 두께 비율을 고려하여 더욱 다양한 주파수 대역에 알맞은 다양한 흡음 성능을 가진 다층 흡음재를 제작할 수 있다.(6) At this time, by manufacturing the thickness of the polyurethane foam and the glass fiber layer to 20 ~ 30 mm, considering the thickness and the thickness ratio of the polyurethane foam and the glass fiber layer based on this thickness, various It is possible to manufacture a multi-layered sound absorbing material having sound absorbing performance.

[도 1]은 자동차에서 다층 흡음재가 사용되는 위치를 보여주는 자동차의 측면도이다.
[도 2]는 종래 폴리우레탄 폼의 양쪽 면에 부직포가 일체로 이루어진 종래 다층 흡음재를 보여주는 도면으로, (a)는 사시도이고, (b)는 단면도이다.
[도 3]은 본 발명에 따라 종래 폴리우레탄 폼과 같은 두께가 되게 폴리우레탄 폼과 유리 섬유층을 일체로 구성한 다층 흡음재를 보여주는 도면으로, (a)는 사시도이고, (b)는 단면도이다.
[도 4]는 주파수 변화에 따른 흡음 성능을 비교하기 위한 비교예와 실시예의 사진으로, (a)는 폴리우레탄 폼이 27㎜로 제작된 비교예를, (b)는 폴리우레탄 폼과 유리 섬유층이 27㎜로 제작된 실시예를 각각 보여준다.
[도 5]는 [도 4]의 비교예와 실시예에 대해 주파수(㎐) 변화에 따른 흡음 성능(Absorption Coefficient)을 보여주는 그래프이다.
[Figure 1] is a side view of a car showing a position where a multi-layered sound absorbing material is used in the car.
[Figure 2] is a view showing a conventional multi-layered sound absorbing material in which nonwoven fabric is integrally formed on both sides of a conventional polyurethane foam, (a) is a perspective view, and (b) is a cross-sectional view.
[Figure 3] is a view showing a multi-layered sound absorbing material integrally configured with a polyurethane foam and a glass fiber layer to have the same thickness as a conventional polyurethane foam according to the present invention, (a) is a perspective view, and (b) is a cross-sectional view.
[Figure 4] is a photograph of a comparative example and an example for comparing sound absorption performance according to frequency change, (a) is a comparative example in which polyurethane foam is made of 27 mm, (b) is polyurethane foam and a glass fiber layer Each of the examples fabricated with this 27 mm is shown.
[FIG. 5] is a graph showing the absorption coefficient according to the frequency (Hz) change for the comparative example and the embodiment of [FIG. 4].

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 더욱 상세히 설명하기로 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 안 되며, 발명자는 그 자신의 발명을 최고의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 따라 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors should properly define the concept of terms in order to best explain their invention. According to the principle that it can be interpreted as meaning and concept consistent with the technical spirit of the present invention.

따라서 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원 시점에서 이들을 대체할 수 있는 다양한 균등물과 변형례가 있을 수 있음을 이해하여야 한다.Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, various equivalents that can replace them at the time of this application It should be understood that there may be variations.

[자동차용 다층 흡음재][Multi-layer sound absorbing material for automobiles]

본 발명에 따른 자동차용 다층 흡음재는, [도 2] 내지 [도 5]와 같이, 두 개의 부직포(12), 그리고 상기 부직포(12) 사이에 일체로 구성되는 폴리우레탄 폼(10)과 유리 섬유층(11)이 포함된다.As shown in [Figs. 2] to [5], the multilayer sound absorbing material for automobiles according to the present invention includes two nonwoven fabrics 12, and a polyurethane foam 10 and a glass fiber layer integrally formed between the nonwoven fabrics 12. (11) is included.

특히, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)의 두께(T)는 기존 자동차용 다층 흡음재에서 흡음재로 사용하는 폴리우레탄 폼(1)과 같은 두께(T)로 형성됨으로써, 폴리우레탄 폼(1)으로만 이용할 때보다 흡음 성능을 높일 수 있게 한 것이다.In particular, the thickness (T) of the polyurethane foam 10 and the glass fiber layer 11 is formed to the same thickness (T) as the polyurethane foam (1) used as a sound absorbing material in a conventional multilayer sound absorbing material for automobiles, It is possible to increase the sound absorption performance compared to the case of using only (1).

이때, 폴리우레탄 폼(10)보다 유리 섬유층(11)이 가벼우므로, 흡음 성능 개선과 더불어 다층 흡음재의 전체 중량을 약 10% 정도 줄일 수 있어 자동차 연비를 개선할 수 있게 한 것이다.At this time, since the glass fiber layer 11 is lighter than the polyurethane foam 10, it is possible to reduce the total weight of the multi-layer sound absorbing material by about 10% along with improving the sound absorbing performance, thereby improving automobile fuel efficiency.

또한, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)의 두께(T)는 20~30㎜ 범위에서 적절한 성형성과 기능성 그리고 흡음 성능을 고려해서 적절한 두께로 선택해서 사용할 수 있게 한 것이다. 이를 위해, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)의 두께 비율은 (0.2~0.8) : (0.2~0.8)로 설정하는 것이 바람직하다.In addition, the thickness (T) of the polyurethane foam 10 and the glass fiber layer 11 is in the range of 20 to 30 mm so that it can be selected and used in an appropriate thickness in consideration of appropriate moldability, functionality, and sound absorption performance. To this end, the thickness ratio of the polyurethane foam 10 and the glass fiber layer 11 is preferably set to (0.2 to 0.8) : (0.2 to 0.8).

이하, 이러한 구성에 관해 첨부도면을 참조하여 더욱 상세하게 설명하면 다음과 같다. 여기서, 도면부호 'T'는 종래 다층 흡음재에서 사용되는 폴리우레탄 폼(1)의 두께로, 본 발명에 따른 폴리우레탄 폼과 유리 섬유층을 합친 두께와 같다.Hereinafter, this configuration will be described in more detail with reference to the accompanying drawings. Here, the reference number 'T' is the thickness of the polyurethane foam 1 used in the conventional multi-layer sound absorbing material, which is equal to the combined thickness of the polyurethane foam and the glass fiber layer according to the present invention.

가. 부직포go. Non-woven

부직포(12)는, [도 3]과 같이, 두 장이 서로 마주하게 배치된다. 상기 부직포(12)는 섬유가 얽혀 방향성이 없어 자른 가장자리가 풀리지 않고 쉽게 찢어지거나 파손되지 않아 본 발명에 따른 다층 흡음재의 구조적 강성을 보강한다. 이러한 부직포(12)는 본 발명이 속한 기술분야에서 구조적 강성을 보강하는데 이용하는 통상의 기술로 제작된 것을 이용할 수 있다.As shown in [Fig. 3], two sheets of the nonwoven fabric 12 are disposed facing each other. The non-woven fabric 12 has no direction due to entangled fibers, so the cut edge is not unraveled and is not easily torn or damaged, reinforcing the structural rigidity of the multi-layered sound absorbing material according to the present invention. Such non-woven fabric 12 may be manufactured by a conventional technique used to reinforce structural rigidity in the technical field to which the present invention belongs.

나. 폴리우레탄 폼과 유리 me. polyurethane foam and glass 섬유층fiber layer

폴리우레탄 폼(10)과 유리 섬유층(11)은, [도 3] 및 [도 4]와 같이, 서로 적층된 상태에서 상술한 두 장의 부직포(12) 사이에 삽입되어 일체로 형성된다. 이때, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)은 접착제를 이용해서 일체로 부착할 수도 있고, 140℃ 이하의 저융점 고분자를 필름이나 면 형태로 형성하여 일체로 부착할 수도 있으나, 가장 바람직하게는 핫멜트를 필름 형태로 제작하여 삽입하거나 핫멜트를 접착 면에 분무하는 방식을 이용하는 것이 더욱 바람직하다.The polyurethane foam 10 and the glass fiber layer 11, as shown in [FIG. 3] and [FIG. 4], are integrally formed by being inserted between the above-mentioned two sheets of nonwoven fabric 12 in a laminated state. At this time, the polyurethane foam 10 and the glass fiber layer 11 may be integrally attached using an adhesive, or may be integrally attached by forming a low melting point polymer of 140 ° C. or less in the form of a film or surface, but the most Preferably, it is more preferable to use a method of manufacturing and inserting a hot melt in the form of a film or spraying the hot melt on an adhesive surface.

특히, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)의 두께를 합한 전체 두께(T)는, [도 2] 및 [도 3]과 같이, 종래 다층 흡음재에서 사용하던 폴리우레탄 폼(1)의 두께(T)와 같은 두께로 형성하는 것이 바람직하다.In particular, the total thickness (T) of the combined thickness of the polyurethane foam 10 and the glass fiber layer 11 is, as shown in [Figs. It is preferable to form the same thickness as the thickness (T) of.

이는, 본 발명에 따른 다층 흡음재가 기존 흡음재와 같은 두께로 이루어지면서도 가벼운 재질인 유리 섬유층(11)을 이용하여 본 발명에 따른 다층 흡음재의 전체 중량을 줄이면서도 후술하는 바와 같이 흡음 성능을 높일 수 있게 하기 위함이다.This is because the multi-layered sound-absorbing material according to the present invention is made of the same thickness as the conventional sound-absorbing material, and the overall weight of the multi-layered sound-absorbing material according to the present invention is reduced by using the glass fiber layer 11, which is a light material, while improving the sound-absorbing performance as described later. in order to have

또한, 본 발명의 바람직한 실시예에서, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)으로 이루어진 전체 두께(T)는, [도 3]과 같이, 20~30㎜로 제작하는 것이 바람직하다. 이는, 한정된 자동차 공간 안에 설치되는 다층 흡음재의 전체 두께가 두꺼워지지 않게 하면서도 폴리우레탄 폼(10)과 유리 섬유층(11)을 통해 다층 흡음재가 설치되는 곳에서 요구되는 두께와 함께 충분한 흡음 성능을 얻을 수 있게 하기 위함이다.In addition, in a preferred embodiment of the present invention, the total thickness (T) made of the polyurethane foam 10 and the glass fiber layer 11 is preferably manufactured to 20 to 30 mm, as shown in [Fig. 3]. This makes it possible to obtain sufficient sound absorbing performance with the thickness required where the multi-layer sound absorbing material is installed through the polyurethane foam 10 and the glass fiber layer 11 without increasing the overall thickness of the multi-layer sound absorbing material installed in the limited vehicle space. in order to have

이때, 상기 폴리우레탄 폼(10)과 유리 섬유층(11)의 두께 비율은 (0.2~0.8) : (0.2~0.8)로 제작함으로써, 본 발명에 따른 다층 흡음재가 설치되는 위치에서 요구되는 성형성과 흡음성 그리고 전체 두께에 맞춰 적절한 비율로 제작할 수 있게 구성하는 것이 바람직하다.At this time, the thickness ratio of the polyurethane foam 10 and the glass fiber layer 11 is (0.2 to 0.8): (0.2 to 0.8), so that the moldability and sound absorption properties required at the location where the multilayer sound absorbing material according to the present invention is installed And it is desirable to configure it so that it can be manufactured in an appropriate ratio according to the overall thickness.

마지막으로, 이러한 폴리우레탄 폼(10)과 유리 섬유층(11)의 전체 두께(T)와 그 두께 비율을 통해 기존 다층 흡음재에서 이용되는 폴리우레탄(1)의 중량과 비교하여 8~12% 중량이 덜 나가게 제작함으로써, 흡음 성능과 함께 중량 감소로 자동차 연비를 개선할 수 있게 된다.Finally, the total thickness (T) of the polyurethane foam 10 and the glass fiber layer 11 and the thickness ratio thereof are 8 to 12% in weight compared to the weight of the polyurethane 1 used in the existing multi-layer sound absorbing material. By making it less expensive, it is possible to improve automobile fuel efficiency by reducing weight along with sound absorption performance.

이처럼 이루어진 본 발명에 따른 다층 흡음재에 대해 기존 폴리우레탄 폼으로 이루어진 기존 다층 흡음재에 대해 주파수에 대한 흡음성능시험 결과는 다음의 [도 4] 및 [도 5]와 같다. [도 4]에서, (a)는 폴리우레탄 폼이 27㎜로 제작된 비교예를, (b)는 폴리우레탄 폼과 유리 섬유층이 27㎜로 제작된 실시예를 각각 보여준다. [도 5]에서, 가로축은 주파수(㎐)를, 세로축은 흡음 성능(Absorption Coefficient)를, 검은 선은 비교예의 흡음 성능을 보여주고, 붉은 선은 실시예의 흡음 성능을 각각 보여준다.For the multi-layered sound-absorbing material according to the present invention made as described above, the results of the sound-absorbing performance test for the frequency of the existing multi-layered sound-absorbing material made of polyurethane foam are as follows [Fig. 4] and [Fig. 5]. In [Figure 4], (a) shows a comparative example in which the polyurethane foam is made of 27 mm, and (b) shows an example in which the polyurethane foam and the glass fiber layer are made of 27 mm. In [Fig. 5], the horizontal axis shows the frequency (Hz), the vertical axis shows the sound absorption performance (Absorption Coefficient), the black line shows the sound absorption performance of the comparative example, and the red line shows the sound absorption performance of the example, respectively.

그 결과, 본 발명에 따라 제작된 실시예가 주파수 대역 전반에 걸쳐 흡음 성능이 우수한 것을 알 수 있고, 특히 낮은 음역 대역(500~2,000㎐)에서 흡음 성능이 비교예와 비교하여 실시예가 한층 더 좋아진 것을 알 수 있다.As a result, it can be seen that the embodiment manufactured according to the present invention has excellent sound absorption performance over the entire frequency band, and in particular, the sound absorption performance in the low sound band (500 ~ 2,000 Hz) is much better than that of the comparative example. Able to know.

10: 폴리우레탄 폼
11: 유리 섬유층
12: 부직포
T: 두께
10: polyurethane foam
11: glass fiber layer
12: non-woven fabric
T: thickness

Claims (4)

서로 마주하는 두 개의 부직포(12) 사이에 소정의 두께(T)를 가진 폴리우레탄 폼(1)이 일체로 이루어진 자동차용 다층 흡음재에서,
부직포(12) 사이에는,
폴리우레탄 폼(10)과 유리 섬유층(11)이 두께(T)만큼 겹쳐져서 이루어진 것을 특징으로 하는 자동차용 다층 흡음재.
In a multilayer sound absorbing material for automobiles in which a polyurethane foam 1 having a predetermined thickness T is integrally formed between two nonwoven fabrics 12 facing each other,
Between the nonwoven fabrics 12,
Polyurethane foam 10 and the glass fiber layer 11 are overlapped by a thickness (T) multi-layer sound absorbing material for automobiles, characterized in that.
제1항에서,
상기 두께(T)는,
20~30㎜인 것을 특징으로 하는 자동차용 다층 흡음재.
In paragraph 1,
The thickness (T) is,
Multilayer sound absorbing material for automobiles, characterized in that 20 ~ 30 mm.
제1항에서,
상기 폴리우레탄 폼(10)과 유리 섬유층(11)은,
두께 비율이 (0.2~0.8) : (0.2~0.8)인 것을 특징으로 하는 자동차용 다층 흡음재.
In paragraph 1,
The polyurethane foam 10 and the glass fiber layer 11,
Thickness ratio (0.2 ~ 0.8): (0.2 ~ 0.8) Multilayer sound absorbing material for automobiles, characterized in that.
제1항 내지 제3항 중 어느 한 항에서,
두 개의 부직포(12) 사이에 소정의 두께(T)를 가진 폴리우레탄 폼(1)이 일체로 이루어진 자동차용 흡음재보다 8~12% 중량이 적은 것을 특징으로 하는 자동차용 다층 흡음재.
In any one of claims 1 to 3,
Polyurethane foam (1) having a predetermined thickness (T) between two non-woven fabrics (12) is a multilayer sound absorbing material for automobiles, characterized in that the weight is 8 to 12% less than the sound absorbing material for automobiles integrally formed.
KR1020210083806A 2021-06-28 2021-06-28 Multiple layer noise absorbing material for vehicle KR20230001186A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101549060B1 (en) 2014-04-18 2015-09-02 엔브이에이치코리아(주) Manufacturing method of sound-absorbing material for vehicle using micro-fiber
KR101601658B1 (en) 2014-10-23 2016-03-10 (주)대한솔루션 Insulation for floor carpet of vehicle
KR102140941B1 (en) 2019-04-30 2020-08-05 (주)대한솔루션 Method for forming polyurethane absorptive material of vehicle and the polyurethane absorptive material thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101549060B1 (en) 2014-04-18 2015-09-02 엔브이에이치코리아(주) Manufacturing method of sound-absorbing material for vehicle using micro-fiber
KR101601658B1 (en) 2014-10-23 2016-03-10 (주)대한솔루션 Insulation for floor carpet of vehicle
KR102140941B1 (en) 2019-04-30 2020-08-05 (주)대한솔루션 Method for forming polyurethane absorptive material of vehicle and the polyurethane absorptive material thereof

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