KR0178583B1 - Composite material sandwich fabric having foam layers of differet density - Google Patents

Composite material sandwich fabric having foam layers of differet density Download PDF

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Publication number
KR0178583B1
KR0178583B1 KR1019950038812A KR19950038812A KR0178583B1 KR 0178583 B1 KR0178583 B1 KR 0178583B1 KR 1019950038812 A KR1019950038812 A KR 1019950038812A KR 19950038812 A KR19950038812 A KR 19950038812A KR 0178583 B1 KR0178583 B1 KR 0178583B1
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South Korea
Prior art keywords
foam layer
sandwich structure
foam
density
skin layers
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KR1019950038812A
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Korean (ko)
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KR970020414A (en
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손민영
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토니헬샴
볼보건설기계코리아주식회사
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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
    • B32B5/32—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 at least two layers being foamed and next to each other
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating

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  • Laminated Bodies (AREA)

Abstract

본 발명은 샌드위치구조물에 관한 것으로, 특히 흡음, 방진 및 단열성이 뛰어날 뿐만아니라 고강도, 고강성, 내충격성이 요구되는 곳에 사용하기에 적합한 샌드위치구조체에 관한 것이다. 종래의 허니콤형태의 발포체층은 제작이 어렵고, 무거우며 균열이 전체적으로 일어난다는 단점이 있었다. 본 발명에 따른 샌드위치구조체는 서로 밀도가 다른 발포체층을 갖는다. 본 발명에 따른 샌드위치구조체는 무게에 비해 강도, 내충격성이 뛰어나며, 균열이 발생되더라도 구조물 전체적으로 진행되지 않는다는 장점이 있다. 본 발명에 따른 샌드위치구조체는 고강도, 고강성, 내충격이 요구되는 곳, 특히 특장 차량의 외부 패널이나, 캐빈(cabin)에 사용하면 매우 유용하다.The present invention relates to a sandwich structure, and more particularly, to a sandwich structure suitable for use where high strength, high rigidity, impact resistance is required as well as excellent sound absorption, dustproof and heat insulation. The conventional honeycomb foam layer has a disadvantage in that it is difficult to manufacture, heavy, and cracking occurs as a whole. The sandwich structure according to the present invention has a foam layer having a different density from each other. Sandwich structure according to the present invention has an advantage of excellent strength, impact resistance compared to the weight, even if a crack is generated does not proceed as a whole structure. The sandwich structure according to the present invention is very useful when used in places where high strength, high rigidity and impact resistance are required, in particular in exterior panels of cabin vehicles or cabins.

Description

서로 다른 밀도의 발포체층을 갖는 복합재료 샌드위치구조체Composite sandwich structure with foam layers of different densities

제1도는 본 발명의 일실시예에 따른 샌드위치구조체의 단면도.1 is a cross-sectional view of a sandwich structure according to an embodiment of the present invention.

제2도는 본 발명의 다른 실시예에 따른 샌드위치구조체의 단면도.2 is a cross-sectional view of a sandwich structure according to another embodiment of the present invention.

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

10,12 : 표피층 20 : 제1발포체층10,12: epidermal layer 20: first foam layer

22 : 제2발포체층 24 : 제3발포체층22: second foam layer 24: third foam layer

30 : 접착층30: adhesive layer

본 발명은 샌드위치구조물에 관한 것으로, 특히 흡음, 방진 및 단열성이 뛰어날 뿐만아니라 고강도, 고강성, 내충격성이 요구되는 곳에 사용하기에 적합한 샌드위치구조체에 관한 것이다.The present invention relates to a sandwich structure, and more particularly, to a sandwich structure suitable for use where high strength, high rigidity, impact resistance is required as well as excellent sound absorption, dustproof and heat insulation.

일반적으로 샌드위치구조체는 흡음, 방진 및 단열을 목적으로 섬유강화프라스틱(FRP)으로 된 양 표피층과 그 사이의 발포체로 된 중간층으로 이루어져 있다. 이러한 샌드위치구조체가 고강도, 고강성을 가질 수 있도록 성형하고자 할 때 밀도가 높은 경질 발포체를 사용하면 일반적으로 높은 강도를 얻을 수 있으나 무겁다. 반면에 밀도가 낮은 연질 발포체를 사용하면 무게는 가벼우나 강성이 떨어진다.In general, a sandwich structure is composed of both skin layers of fiber reinforced plastic (FRP) and an intermediate layer of foam therebetween for the purpose of sound absorption, dustproofing and insulation. When the sandwich structure is to be molded to have a high strength and high rigidity, when using a high-density rigid foam is generally obtained high strength, but heavy. On the other hand, low-density soft foams are lighter but less rigid.

종래에 개발된 것으로 고강도, 고강성의 특성을 갖는 샌드위치구조체를 만들기 위해 허니콤(honey-comb) 구조에 발포체를 접착시킨 것이 있다. 이렇게 만들어진 샌드위치구조체는 강도가 뛰어나지만 무겁고, 제조시 허니콤과 발포체를 별도로 제작하여야 된다는 단점이 있다. 그리고, 허니콤과 발포체간의 접착도 어려운 문제이며 경우에 따라 이 두 층간의 분리현상이 야기될 수 있다. 이 경우 역시 큰 충격이 작용되면 발포체의 균열이 전체적으로 진행된다는 단점을 가지고 있다.The conventionally developed one has a foam adhered to a honey-comb structure to make a sandwich structure having high strength and high rigidity. Sandwich structure made in this way is excellent in strength but heavy, and has a disadvantage in that the honeycomb and foam to be manufactured separately during manufacture. In addition, adhesion between the honeycomb and the foam is also a difficult problem, and in some cases, separation between the two layers may occur. In this case, too, when a large impact is applied, cracking of the foam proceeds as a whole.

본 발명의 목적은 큰 충격 등에 의한 발포체의 균열이 전체적으로 진행되는 것을 막을 수 있고, 가벼운 반면 강도는 뛰어나며 내충격성도 우수한 샌드위치구조체를 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a sandwich structure which can prevent cracking of the foam as a whole due to a large impact or the like, and which is light while having excellent strength and excellent impact resistance.

이와같은 본 발명의 목적은 복합재료 샌드위치구조체에 있어서, 소정간격 이격하여 배치되고 섬유강화프라스틱으로 성형된 양 표피층, 상기 양 표피층 사이에 배치되고, 소정의 밀도를 갖는 재료로 구성된 제1발포체층 및 상기 양 표피층 사이에 배치되고, 상기 제1발포체층과 다른 밀도를 갖는 재료로 구성된 제2발포체층을 포함하는 것을 특징으로 하는 샌드위치구조체에 의해 달성 가능하다.Thus, an object of the present invention is to provide a composite sandwich structure, comprising: a first skin layer composed of a material having a predetermined density, disposed between both skin layers formed by fiber-reinforced plastics and spaced apart from each other by a predetermined thickness, and having a predetermined density; It is achievable by a sandwich structure, which is disposed between the two skin layers and comprises a second foam layer made of a material having a different density from the first foam layer.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

제1도는 본 발명의 일실시예에 따른 샌드위치구조체의 단면도이다. 제1도 샌드위치구조체는 양 표피층(10,12)을 구비하고 있다. 이 양 표피층(10,12)은 섬유강화프라스틱으로 이루어져 있다. 이 표피층(10,12)의 성형에 사용되는 섬유로는 유리섬유, 아라미드섬유, 탄소섬유 등이 있으며, 수지로는 불포화 폴리에스터, 에폭시와 같은 열경화성 수지 또는 폴리카보네이트, 내충격성 폴리스티렌 등과 같은 열가소성 수지가 사용된다.1 is a cross-sectional view of a sandwich structure according to an embodiment of the present invention. The sandwich structure of FIG. 1 has both skin layers 10 and 12. Both skin layers 10 and 12 are made of fiber reinforced plastic. Fibers used for molding the skin layers 10 and 12 include glass fibers, aramid fibers, carbon fibers, and the like. Thermoplastic resins such as unsaturated polyester and epoxy or thermoplastic resins such as polycarbonate and impact polystyrene may be used. Is used.

양 표피층(10,12) 사이에는 밀도가 서로 다른 제1발포체층(20)과 제2발포체층(22)이 배치되어 있다. 제1발포체층(20)과 제2발포체층(22)은 접착제로 접착되어 그 사이에 접착층(30)이 형성되어 있고, 위쪽 표피층(10)과 제1발포체층(20), 아래쪽 표피층(12)과 제2발포체층(22)도 접착제로 접착되어 있다. 여기에서의 접착에는 불포화 폴리에스터, 에폭시 등의 열경화성 접착제가 사용된다.The first foam layer 20 and the second foam layer 22 having different densities are disposed between the skin layers 10 and 12. The first foam layer 20 and the second foam layer 22 are bonded with an adhesive to form an adhesive layer 30 therebetween, the upper skin layer 10, the first foam layer 20, and the lower skin layer 12. ) And the second foam layer 22 are also bonded with an adhesive. Thermosetting adhesives, such as unsaturated polyester and an epoxy, are used for adhesion | attachment here.

제1,제2발포체층(20,22)을 구성하는 발포체로는 폴리우레탄, 폴리비닐크로라이드 페놀, 에폭시 등의 고분자 수지를 발포한 것이 사용된다. 여기서 제1발포체층(20)에는 발포배율이 2 내지 5배, 밀도는 0.1 내지 0.5의 것을 사용하고, 제2발포체층(22)에는 발포배율이 10 내지 30배, 밀도는 0.05 이하인 것을 사용하면 된다. 물론, 제1발포체층(20)과 제2발포체층(22)의 상·하위치는 바뀌어도 되며, 제1, 제2발포체층(20,22)의 발포배율 및 밀도는 필요에 따라 변경할 수 있다. 단지 두 발포체층(20,22)의 밀도가 서로 다르도록 구성하면 된다.As the foams constituting the first and second foam layers 20 and 22, foamed polymer resins such as polyurethane, polyvinyl chloride phenol and epoxy are used. In this case, the foaming ratio of 2 to 5 times and the density of 0.1 to 0.5 are used for the first foam layer 20, and the foaming ratio of 10 to 30 times and the density of 0.05 or less is used for the second foam layer 22. do. Of course, the upper and lower positions of the first foam layer 20 and the second foam layer 22 may be changed, and the expansion ratio and density of the first and second foam layers 20 and 22 may be changed as necessary. Only the two foam layers 20, 22 may be configured to have different densities.

제2도는 본 발명의 다른 실시예에 따른 샌드위치구조체의 단면도이다. 제1도 샌드위치구조체는 양 표피층(10,12)을 구비하고 있다. 이 양 표피층(10,12)은 섬유강화프라스틱으로 이루어져 있다. 이 표피층(10,12)의 성형에 사용되는 섬유로는 유리섬유, 아라미드섬유, 탄소섬유 등이 있으며, 수지로는 불포화 폴리에스터, 에폭시와 같은 열경화성수지 또는 폴리카보네이트, 내충격성 폴리스티렌 등과 같은 열가소성 수지가 사용된다.2 is a cross-sectional view of a sandwich structure according to another embodiment of the present invention. The sandwich structure of FIG. 1 has both skin layers 10 and 12. Both skin layers 10 and 12 are made of fiber reinforced plastic. Fibers used for molding the skin layers 10 and 12 include glass fibers, aramid fibers, carbon fibers, and the like. Thermoplastic resins such as unsaturated polyester and epoxy or thermoplastic resins such as polycarbonate and impact polystyrene may be used. Is used.

양 표피층(10,12) 사이에는 밀도가 서로 다른 제1발포체층(20)과 제2발포체층(22) 및 제3발포체층(24)이 배치되어 있다. 제1발포체층(20)과 제3발포체층(24), 제2발포체층(22)과 제3발포체층(24)은 접착제로 접착되어 그 사이에는 접착층(30)이 형성되어 있고, 위쪽 표피층(10)과 제1발포체층(20), 아래쪽 표피층(12)과 제2발포체층(22)도 접착제로 접착되어 있다. 여기에서의 접착에는 불포화 폴리에스터, 에폭시 등의 열경화성 접착제가 사용된다.The first foam layer 20, the second foam layer 22, and the third foam layer 24 having different densities are disposed between the skin layers 10 and 12. The first foam layer 20 and the third foam layer 24, the second foam layer 22 and the third foam layer 24 is bonded with an adhesive, the adhesive layer 30 is formed therebetween, the upper skin layer 10, the first foam layer 20, the lower skin layer 12, and the second foam layer 22 are also bonded with an adhesive. Thermosetting adhesives, such as unsaturated polyester and an epoxy, are used for adhesion | attachment here.

제1,제2,제3발포체층(20,22,24)을 구성하는 발포체로는 폴리우레탄, 폴리비닐크로라이드 페놀, 에폭시 등의 고분자 수지를 발포한 것이 사용된다. 여기서, 제1발포체층(20)에는 발포배율이 2 내지 5배, 밀도는 0.1 내지 0.5의 것을 사용하면 된다. 그리고, 제2발포체층(22)에는 발포배율이 10 내지 30배, 밀도는 0.05 이하인 것을 사용하면 되고, 제3발포체층(24)은 제1발포체층(20)과 제2발포체층(22)의 중간정도의 발포배율과 밀도를 갖는 발포체를 사용하면 된다. 물론, 경우에 따라서는 제1발포체층(20), 제2발포체층(22) 및 제3발포체층(24)의 상·하 위치는 변경될 수 있으며, 제1,제2,제3발포체층(20,22,24)의 발포배율 및 밀도는 필요에 따라 조금씩 변경할 수 있다. 단지 세 발포체층(20,22,24)의 밀도가 서로 다르도록 구성하면 된다.As the foam constituting the first, second and third foam layers 20, 22 and 24, foamed polymer resin such as polyurethane, polyvinyl chloride phenol and epoxy is used. Here, for the first foam layer 20, a foaming ratio of 2 to 5 times and a density of 0.1 to 0.5 may be used. The second foam layer 22 may have a foam ratio of 10 to 30 times and a density of 0.05 or less, and the third foam layer 24 may include the first foam layer 20 and the second foam layer 22. A foam having a medium foaming ratio and density can be used. Of course, in some cases, the upper and lower positions of the first foam layer 20, the second foam layer 22 and the third foam layer 24 may be changed, the first, second, third foam layer The expansion ratio and density of (20, 22, 24) can be changed little by little if necessary. Only the three foam layers 20, 22 and 24 need to be configured so as to have different densities.

또한, 필요한 경우 양 표피층(10,12) 사이에 서로 밀도가 다른 더 많은 발포체층을 삽입하여 사용할 수 있다.In addition, if necessary, more foam layers having different densities from each other may be inserted between the two skin layers 10 and 12.

이상, 제1도와 제2도를 통하여 설명한 바와같은 본 발명에 따른 샌드위치구조체를 사용하면 무게에 비해 강도가 뛰어나며, 내충격성이 우수한 구조물을 얻을 수 있다. 뿐만 아니라, 충격에 의해 균열이 발생되더라도 균열이 전체적으로 진행되지 않고 서로 밀도가 다른 각 발포체층의 경계면에서 중단되게 된다.As described above, when the sandwich structure according to the present invention as described with reference to FIGS. 1 and 2 is used, a structure having excellent strength and excellent impact resistance can be obtained. In addition, even if a crack is generated by the impact, the crack does not proceed as a whole and is stopped at the interface of each foam layer having a different density from each other.

이러한 본 발명에 따른 샌드위치구조체는 고강도, 고강성, 내충격이 요구되는 곳, 특히 특장 차량의 외부 패널(panel)이나, 캐빈(cabin)에 사용하면 매우 유용하다.The sandwich structure according to the present invention is very useful when used in places where high strength, high rigidity and impact resistance are required, particularly for exterior panels of cabin vehicles or cabins.

Claims (4)

복합재료 샌드위치구조체에 있어서, 소정간격 이격하여 배치되고 섬유강화프라스틱으로 성형된 양 표피층; 상기 양 표피층 사이에 배치되고, 소정의 밀도를 갖는 재료로 구성된 제1발포체층; 상기 양 표피층 사이에 배치되고, 상기 제1발포체층과 다른 밀도를 갖는 재료로 구성된 제2발포체층; 및 상기 양 표피층, 제1발포체층, 제2발표체층을 상호 접합하는 불포화 폴리에스터, 에폭시 등의 열경화성 접착제를 포함하는 것을 특징으로 하는 샌드위치구조체.A composite sandwich structure, comprising: both skin layers disposed at predetermined intervals and molded into fiber reinforced plastics; A first foam layer disposed between the two skin layers and composed of a material having a predetermined density; A second foam layer disposed between the two skin layers and composed of a material having a different density from the first foam layer; And a thermosetting adhesive such as unsaturated polyester, epoxy, etc., which bond the skin layers, the first foam layer, and the second precursor layer to each other. 제1항에 있어서, 제1발포체층과 상기 제2발포체층 사이에 배치되고 상기 제1발포체층 및 제2발포체층과 다른 밀도를 갖는 재료로 구성된 제3발포체층을 더 포함하는 것을 특징으로 하는 샌드위치구조체.The method of claim 1, further comprising a third foam layer disposed between the first foam layer and the second foam layer and made of a material having a different density from the first foam layer and the second foam layer. Sandwich structure. 제1항에 있어서, 상기 양 표피층의 성형에는 유리섬유, 아라미드섬유, 탄소섬유를 중 적어도 하나의 섬유와, 불포화 폴리에스터, 에폭시 등이 열경화성수지 또는 내충격성 폴리스티렌 등의 열가소성수지가 사용된 것을 특징으로 하는 샌드위치구조체.The method of claim 1, wherein the two skin layers are formed of at least one of glass fibers, aramid fibers, carbon fibers, unsaturated polyester, epoxy, etc., characterized in that thermoplastic resin such as thermosetting resin or impact resistant polystyrene is used. Sandwich structure. 제1항 또는 제2항에 있어서, 상기 제1,제2,제3발포체로는 폴리우레탄, 폴리스티렌, 폴리비닐크로라이드, 페놀, 에폭시 등의 고분자 수지를 발포하여 사용한 것을 특징으로 하는 샌드위치구조체.The sandwich structure according to claim 1 or 2, wherein the first, second, and third foams are foamed with a polymer resin such as polyurethane, polystyrene, polyvinyl chloride, phenol, and epoxy.
KR1019950038812A 1995-10-31 1995-10-31 Composite material sandwich fabric having foam layers of differet density KR0178583B1 (en)

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KR100760484B1 (en) * 2006-06-29 2007-09-20 한국과학기술원 Hybrid panel for scaffold and scaffold using the same
US11510804B2 (en) * 2016-12-02 2022-11-29 3M Innovative Properties Company Muscle or joint support article with a strap

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KR100446002B1 (en) * 2002-02-01 2004-08-25 영보화학 주식회사 Composite foamed material for soundproofing of building
KR100479929B1 (en) * 2002-04-04 2005-04-06 (주) 유성건축사사무소 Soundproofing board for construction and the method thereof
KR100537839B1 (en) * 2002-05-29 2005-12-20 유니슨 주식회사 A soundproof of having a height acoustic-absorptivity
KR100729871B1 (en) * 2005-04-20 2007-07-02 (주)재현 Board for noise reduction used in building it manufacture method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100760484B1 (en) * 2006-06-29 2007-09-20 한국과학기술원 Hybrid panel for scaffold and scaffold using the same
US11510804B2 (en) * 2016-12-02 2022-11-29 3M Innovative Properties Company Muscle or joint support article with a strap

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