KR100648651B1 - Manufacturing Method of Polyurethane Foam Panel with Polystyrene Bead - Google Patents

Manufacturing Method of Polyurethane Foam Panel with Polystyrene Bead Download PDF

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KR100648651B1
KR100648651B1 KR1020040109899A KR20040109899A KR100648651B1 KR 100648651 B1 KR100648651 B1 KR 100648651B1 KR 1020040109899 A KR1020040109899 A KR 1020040109899A KR 20040109899 A KR20040109899 A KR 20040109899A KR 100648651 B1 KR100648651 B1 KR 100648651B1
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South Korea
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polyurethane foam
polystyrene beads
polyurethane
panel
polystyrene
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KR1020040109899A
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Korean (ko)
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KR20060071009A (en
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정보화
정연재
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주식회사 패널뱅크
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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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0084—Foaming
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • 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
    • 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
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant

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  • Laminated Bodies (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Building Environments (AREA)

Abstract

본 발명은 이액형 폴리우레탄 조성물과 폴리스티렌 비드를 고압 분사하여 혼합 발포시키고 발포시 폴리우레탄 반응열에 의해 용융된 폴리스티렌 기공을 갖는 폴리우레탄 폼을 일정한 두께로 자른 폴리우레탄 폼층과; 상기 폴리우레탄 폼층의 상층과 하층에 도포된 우레탄 접착제층과; 상기 접착제층의 상부와 하부에 각각 부착시킨 외장판재로 구성되는 것을 특징으로 하는 폴리스티렌 비드를 첨가시킨 폴리우레탄 적층 패널 및 그의 제조방법에 관한 것이다.The present invention relates to a polyurethane foam layer comprising a polyurethane foam layer and a polystyrene bead mixed with a high pressure spray and foamed, and a polyurethane foam layer having a predetermined thickness of polyurethane foam having polystyrene pores melted by a polyurethane reaction heat during foaming; A urethane adhesive layer applied to upper and lower layers of the polyurethane foam layer; The present invention relates to a polyurethane laminated panel to which polystyrene beads are added, and a manufacturing method thereof, comprising an exterior plate member attached to upper and lower portions of the adhesive layer, respectively.

폴리스티렌 비드, 폴리우레탄, 패널Polystyrene Beads, Polyurethane, Panel

Description

폴리스티렌 비드를 첨가시킨 폴리우레탄 폼 패널의 제조방법{Manufacturing Method of Polyurethane Foam Panel with Polystyrene Bead}Manufacturing Method of Polyurethane Foam Panel with Polystyrene Beads

도 1은 본 발명의 폴리스티렌 비드에 해당하는 기공을 갖는 폴리우레탄 폼 패널의 단면도.1 is a cross-sectional view of a polyurethane foam panel having pores corresponding to the polystyrene beads of the present invention.

도 2는 본 발명의 폴리스티렌 비드가 용융되는 과정을 도시한 일예.Figure 2 is an example showing the process of melting the polystyrene beads of the present invention.

-도면의 상세한 설명-Detailed description of the drawings

1 - 외장판재 4 - 기공 1-face plate 4-pore

2 - 접착재층 5 - 폴리스티렌 비드 2-Adhesive Layer 5-Polystyrene Beads

3 - 폴리우레탄 폼 6 - 용융된 폴리스티렌3-Polyurethane Foam 6-Molten Polystyrene

본 발명은 폴리스티렌 비드를 분산시킨 폴리우레탄 폼 패널에 관한 것으로 폴리우레탄 폼 발포 시 반응열에 의하여 폴리스티렌 비드가 용융되어 폴리스티렌 비드에 해당하는 기공을 형성시킨 폴리우레탄 폼 패널에 관한 것이다.The present invention relates to a polyurethane foam panel in which polystyrene beads are dispersed, and relates to a polyurethane foam panel in which polystyrene beads are melted by heat of reaction during polyurethane foam foaming to form pores corresponding to polystyrene beads.

종래의 발포폴리스티렌(Expended Poly Styrene, EPS) 보온재를 이용한 샌드 위치 패널의 경우 가볍고 흡습성이 우수하고 양호한 단열성을 가지며, 작업성이 좋을 뿐만 아니라 가격이 저렴하여 일반가옥, 축사, 공장 등의 신, 증축에 폭넓게 사용되고 있다.Sandwich panel using conventional expanded polystyrene (EPS) heat insulating material is light, hygroscopic, good heat insulation, good workability and low price, so new houses, houses, factories, etc. Widely used in.

그러나 발포폴리스티렌 단열재를 이용한 샌드위치 패널의 경우 열에 약해 수축변형이 크고 작은 불씨에 의해 전체 형상이 순간적으로 변해버릴 뿐 아니라 연소시에 대량의 연기를 발생하게 되어 대형화재 참사로 이어져 많은 인명이 손상되는 문제점이 있었다.However, in case of sandwich panel using foamed polystyrene insulation, the shrinkage deformation is large and the overall shape is changed instantly by small embers, and a large amount of smoke is generated during combustion, leading to a large fire disaster, which causes many lives to be damaged. There was this.

또한 종래의 폴리우레탄 발포재를 이용한 샌드위치 패널의 경우 EPS에 비하여 외부충격에 대한 강도와 굽힘강도가 높고, 단열성이 우수하여 연료비를 절감할 수 있는 효과가 있으며, 적용 온도범위가 넓은 장점이 있으나, 무겁고, 가격이 고가이며, 화재시 독성가스가 발생하는 문제점이 있었다.In addition, in the case of the sandwich panel using a conventional polyurethane foam material has a high strength and bending strength against external impact, and excellent heat insulating properties to reduce the fuel cost compared to EPS, there is a wide range of application temperature range, Heavy and expensive, there was a problem that toxic gas occurs in the fire.

따라서, 본 발명은 상기의 문제점을 해결하기 위하여 안출된 것으로, 폴리우레탄 폼 발포시 폴리스티렌 비드를 첨가시켜 반응열에 의해 폴리스티렌 비드에 해당하는 기공을 함유한 폴리우레탄 폼을 제공함으로써, 경량화와 더불어 단열효과를 얻어 화재시 연소를 지연시킴으로써 내열성 및 난연성 패널로 사용하는 본 발명은 신규한 것으로 본 발명자가 처음으로 개발하여 본 발명을 완성하였다.Accordingly, the present invention has been made to solve the above problems, by adding a polystyrene bead during polyurethane foam foam to provide a polyurethane foam containing pores corresponding to the polystyrene beads by the heat of reaction, thereby reducing the weight and heat insulation effect The present invention, which is used as a heat resistant and flame retardant panel by delaying combustion in case of fire, is novel and the inventors first developed and completed the present invention.

본 발명의 목적은 폴리우레탄 폼의 사이에 폴리스티렌 비드를 분산시켜 패널의 무게를 감소시키고, 폴리우레탄 폼 발포 시 생성되는 발포열에 의하여 폴리스티 렌 비드가 용융되어 기공을 형성하므로 단열효과와 동시에 난연 효과를 갖는 패널을 제공하는 것이다.An object of the present invention is to reduce the weight of the panel by dispersing the polystyrene beads between the polyurethane foam, the polystyrene beads are melted to form pores by the foaming heat generated when the polyurethane foam is foamed, so that the heat insulation and flame retardant effect at the same time It is to provide a panel having.

본 발명의 또 다른 목적은 기존의 폴리우레탄 패널에 비하여 가격이 저렴한 폴리우레탄 폼 패널을 제공하는 것이다.
It is still another object of the present invention to provide a polyurethane foam panel which is inexpensive as compared to a conventional polyurethane panel.

본 발명은 1) 이액형 폴리우레탄 조성물인 폴리올 혼합물(A액) 10 내지 40 중량%, 이소시아네이트(B액) 10 내지 40중량%와 폴리스티렌 비드 5 내지 30 중량%를 각각의 노즐을 이용하여 몰드에 고압 분사하고, 폴리우레탄 폼을 형성하면서 반응열에 의하여 폴리스티렌 비드가 용융되어 기공을 형성하는 단계; 2) 상기 폴리스티렌 비드가 용융되어 기공을 갖는 폴리우레탄 폼을 경화시킨 후 일정한 두께로 자르는 단계; 3) 상기 일정한 두께로 자른 폴리우레탄 폼의 상층과 하층에 우레탄 접착제를 도포하여 외장판재를 부착시키는 단계; 로 제조되는 폴리스티렌 비드에 해당하는 기공을 가지는 폴리우레탄 폼 패널의 제조방법에 관한 것이다.1) 10 to 40% by weight of a polyol mixture (solution A), 10 to 40% by weight of isocyanate (B solution) and 5 to 30% by weight of polystyrene beads, which are two-component polyurethane compositions, Spraying at high pressure and melting the polystyrene beads by heat of reaction while forming polyurethane foam to form pores; 2) cutting the polystyrene beads to a predetermined thickness after curing the polyurethane foam having pores by melting; 3) attaching the exterior plate material by applying a urethane adhesive to the upper layer and the lower layer of the polyurethane foam cut to a predetermined thickness; It relates to a method for producing a polyurethane foam panel having pores corresponding to the polystyrene beads produced by.

본 발명의 패널을 보다 상세하게 도면을 참조하여 설명하면, 도 1에서 보는 바와 같이 일정한 두께로 자른 폴리우레탄 폼(3)의 상층과 하층에 도포시킨 우레탄 접착제층(2)과, 상기 접착제층(2)의 상부와 하부에 각각 부착시킨 외장판재(1)로 구성되는 폴리스티렌 비드를 첨가시킨 폴리우레탄 폼 패널의 제조방법에 관한 것이다. 본 발명에서는 50 내지 300mm의 일정한 두께로 자르는 것이 바람직하나, 여기에 한정되는 것은 아니다. 상기 두께는 통상적으로 패널에서 사용하는 두께이므로 필요에 따라 달라질 수 있음은 당업자에게는 자명한 것이다.Referring to the drawings of the present invention in more detail with reference to the drawings, as shown in Figure 1, the urethane adhesive layer (2) applied to the upper and lower layers of the polyurethane foam (3) cut to a constant thickness, and the adhesive layer ( It relates to a method for producing a polyurethane foam panel to which a polystyrene bead consisting of an exterior plate member (1) attached to the upper and lower portions of 2), respectively. In the present invention, it is preferable to cut to a constant thickness of 50 to 300mm, but is not limited thereto. It is apparent to those skilled in the art that the thickness may vary depending on necessity because the thickness is typically used in panels.

이 때 사용되는 접착제와 접착방법은 통상의 패널의 제조에 사용되는 접착제와 접착방법을 사용하며, 외장판재는 통상의 패널 제조에 사용되는 것으로 종류는 특별히 한정되지 않는다.At this time, the adhesive and the bonding method used are used for the adhesive and the adhesive method used in the manufacture of a conventional panel, the exterior plate material is used in the manufacture of a conventional panel, the type is not particularly limited.

본 발명에서 상기 폴리우레탄 폼(3)은 폴리스티렌 비드와 이액형 폴리우레탄 조성물을 함께 각각의 노즐을 통하여 몰드에 고압 분사시켜 상기 폴리스티렌 비드와 상기 이액형 폴리우레탄 조성물이 혼합이 되도록 하며, 이액형 폴리우레탄 조성물인 폴리올 혼합물(A액)과 이소시아네이트(B액)가 우레탄 반응을 하여 겔화되면서 상기 폴리스티렌 비드가 분산되며, 우레탄 반응이 진행되면서 생성되는 반응열에 의하여 분산되어 있는 폴리스티렌 비드가 용융되어 폴리스티렌 비드에 해당하는 기공(4)을 형성하게 된다. 상기 기공(4)은 화재시 연소를 지연시킴으로써 내열성 및 난연성을 증가시키는 역할을 한다.In the present invention, the polyurethane foam (3) is a high-pressure injection of the polystyrene beads and the two-component polyurethane composition to the mold through each nozzle together so that the polystyrene beads and the two-component polyurethane composition is mixed, two-component poly As the polyol mixture (Liquid A) and the isocyanate (Liquid B), which is a urethane composition, are gelatinized by urethane reaction, the polystyrene beads are dispersed, and the polystyrene beads dispersed by the heat of reaction generated during the urethane reaction are melted to the polystyrene beads. The corresponding pores 4 will be formed. The pores 4 serve to increase heat resistance and flame retardancy by delaying combustion in a fire.

이때 상기 기공(4)은 도 2에서 보는 바와 같이 폴리스티렌 비드(5)가 용융된 자리에 폴리스티렌 비드에 해당하는 크기의 기공이 형성되면서 용융된 폴리스티렌덩어리(6)가 기공 안에 존재하게 된다. 통상적으로 폴리우레탄 반응시 발생되는 반응열의 온도는 95 내지 100℃로 폴리스티렌이 용융되기에 적합하다.At this time, the pores 4 are formed in the pores of the size corresponding to the polystyrene beads in the place where the polystyrene beads 5 are melted, as shown in Figure 2, the molten polystyrene mass 6 is present in the pores. Typically, the temperature of the reaction heat generated during the polyurethane reaction is suitable for melting the polystyrene at 95 to 100 ℃.

본 발명에서 사용하는 폴리스티렌 비드는 별도로 제작된 구형의 스티로폼 입자를 사용하거나 폐 스티로폴 덩어리를 분쇄하여 알갱이로 재사용하는 것도 가능하며, 1 내지 5 ㎜의 크기를 갖는 것이 바람직하다. 폴리스티렌 비드의 크기가 너무 큰 경우 제조된 폴리우레탄 폼의 기공이 커져 강도가 약해지는 단점이 있을 수 있 으며, 폴리스티렌 비드의 크기가 너무 작은 경우는 효과가 적다. 따라서 적당한 폴리스티렌 비드의 크기는 1 내지 5 ㎜인 것이 바람직하다. The polystyrene beads used in the present invention may be spherical styrofoam particles separately prepared or may be pulverized and reused as pulverized waste styrofoam, preferably having a size of 1 to 5 mm. If the size of the polystyrene beads is too large, there may be a disadvantage that the pores of the polyurethane foam produced to increase the strength, the polystyrene beads are less effective when the size of the polystyrene beads is too small. Therefore, the size of suitable polystyrene beads is preferably 1 to 5 mm.

폴리스티렌 비드의 사용량은 5 내지 30 중량%를 사용하는 것이 바람직하다. 상기 폴리스티렌 비드를 30중량% 보다 많이 사용하는 경우 제조되는 폴리우레탄 패널의 강도가 약해질 수 있으며, 5중량% 미만으로 사용하는 경우 효과가 적다.The amount of polystyrene beads used is preferably 5 to 30% by weight. If the polystyrene beads are used more than 30% by weight, the strength of the polyurethane panel produced may be weakened, and less than 5% by weight is less effective.

본 발명에서 이액형 폴리우레탄 조성물은 폴리우레탄 폼을 발포하기 위한 액체의 원료로 폴리우레탄 폼 패널에서 통상적으로 사용하는 원료를 사용하며, 폴리올, 촉매, 정포제, 기타 첨가제들이 혼합되어 있는 폴리올 혼합물(A액)과 디페닐 메탄 디이소시아네이트 등의 이소시아네이트(B액)를 혼합하여 사용하며, 이들을 각각 10 내지 40 중량% 사용한다.In the present invention, the two-component polyurethane composition uses a raw material commonly used in a polyurethane foam panel as a raw material of a liquid for foaming a polyurethane foam, and a polyol mixture in which a polyol, a catalyst, a foam stabilizer, and other additives are mixed ( A) and isocyanate (B solution), such as diphenyl methane diisocyanate, are mixed and used, and 10 to 40 weight% of these is used, respectively.

이하는 본 발명의 패널을 제조하는 방법을 일예를 들어 자세히 설명하지만 본 발명이 하기의 범위에 한정되는 것은 아니다.Hereinafter, the method of manufacturing the panel of the present invention will be described in detail by way of example, but the present invention is not limited to the following range.

이액형 폴리우레탄 조성물인 폴리올 혼합물 35중량%, 디페닐 메탄 디이소시아네이트 35중량%와 5mm 크기의 폴리스티렌 비드 30중량%를 각각의 노즐을 이용하여 1m× 1m× 3m(가로× 세로× 높이)크기의 몰드에 고압 분사시켜 폴리우레탄 폼을 형성시킨다. 이 때 앞서 설명한 바와 같이, 상기 폴리우레탄 폼은 우레탄 반응의 반응열에 의하여 폴리스티렌 비드가 있던 자리에 폴리스티렌 비드에 해당하는 기공이 형성된다. 상기 몰드에서 발포시킨 폴리스티렌 비드가 용융된 기공을 갖는 폴리우레탄 폼을 10분 정도 자연 경화 시킨 후 몰드에서 꺼내어 10 cm의 일정한 두 께로 자른다. 상기 10 cm의 두께의 폴리우레탄 폼에 우레탄 접착제를 도포하여 외장판재와 접착시킨다. 35% by weight polyol mixture, 35% by weight diphenyl methane diisocyanate and 30% by weight polystyrene beads of 5 mm size, were prepared using a nozzle of 1 m × 1 m × 3 m (width × vertical × height) size. High pressure spray into the mold to form polyurethane foam. At this time, as described above, in the polyurethane foam, pores corresponding to the polystyrene beads are formed at the place where the polystyrene beads are formed by the reaction heat of the urethane reaction. Polyurethane foam having the pores in which the polystyrene beads foamed in the mold is molten for about 10 minutes and then taken out of the mold and cut to a constant thickness of 10 cm. A urethane adhesive is applied to the polyurethane foam having a thickness of 10 cm to bond the exterior plate material.

하기는 본 발명의 폴리우레탄 폼 패널의 물성을 측정하기 위하여 폴리스티렌 비드를 첨가하지 않은 종래의 폴리우레탄 폼 패널과 물성을 비교하여 하기 표 1에 나타내었다.In order to measure the physical properties of the polyurethane foam panel of the present invention is shown in Table 1 by comparing the physical properties with the conventional polyurethane foam panel without the addition of polystyrene beads.

[표 1]TABLE 1

Figure 112004060403865-pat00001
Figure 112004060403865-pat00001

본 발명에 의하여 제조된 폴리스티렌 비드를 용융시킨 폴리우레탄 패널은 폴리스티렌 비드를 첨가하지 않았을 때보다 가볍고, 열전도율이 낮아 단열성이 증가하는 것을 알 수 있다.It can be seen that the polyurethane panel prepared by melting the polystyrene beads according to the present invention is lighter than when no polystyrene beads are added and the thermal conductivity is lowered to lower the thermal conductivity.

본 발명은 폴리우레탄 폼 사이에 폴리스티렌 비드들이 분산된 형태로 폴리우레탄 발포 시 생성되는 열에 의하여 폴리스티렌 비드가 용융되어 폴리스티렌 비드가 있던 자리에 생성된 기공에 의하여 단열 효과와 난연성이 상승되는 효과가 있다.The present invention has the effect that the heat insulation effect and flame retardancy is increased by the pores generated in the place where the polystyrene beads are melted by the heat generated during the polyurethane foam in the form of the polystyrene beads dispersed between the polyurethane foam.

또한 폴리스티렌 비드를 첨가시켜 폴리우레탄 패널의 무게가 감소하고, 제조 원가를 절감시키는 효과가 있다.In addition, the weight of the polyurethane panel is reduced by adding polystyrene beads, and there is an effect of reducing the manufacturing cost.

Claims (2)

1) 이액형 폴리우레탄 조성물에서 폴리올 혼합물 10 내지 40 중량%, 이소시아네이트 10 내지 40중량%와 폴리스티렌 비드 20 내지 30 중량%를 각각의 노즐을 이용하여 몰드에 고압 분사하고, 폴리우레탄 폼을 형성하면서 반응열에 의하여 폴리스티렌 비드가 용융되어 기공을 형성하는 단계;1) 10 to 40% by weight of polyol mixture, 10 to 40% by weight of isocyanate and 20 to 30% by weight of polystyrene beads in the two-component polyurethane composition are sprayed with high pressure to the mold using the respective nozzles, and heat of reaction while forming polyurethane foam Melting the polystyrene beads to form pores; 2) 상기 폴리스티렌 비드가 용융되어 기공을 갖는 폴리우레탄 폼을 경화시킨 후 일정한 두께로 자르는 단계;2) cutting the polystyrene beads to a predetermined thickness after curing the polyurethane foam having pores by melting; 3) 상기 일정한 두께로 자른 폴리우레탄 폼의 상층과 하층에 접착제를 도포하고 외장판재를 부착시키는 단계;3) applying an adhesive to the upper and lower layers of the polyurethane foam cut to a predetermined thickness and attaching the exterior plate material; 로 제조되는 폴리스티렌 비드에 해당하는 기공을 가지는 폴리우레탄 폼 패널의 제조방법.Method for producing a polyurethane foam panel having pores corresponding to the polystyrene beads produced by. 제 1항에 있어서,The method of claim 1, 상기 폴리스티렌 비드의 크기는 1 내지 5 ㎜인 것을 특징으로 하는 폴리스티렌 비드에 해당하는 기공을 가지는 폴리우레탄 폼 패널의 제조방법.The method of manufacturing a polyurethane foam panel having pores corresponding to polystyrene beads, characterized in that the size of the polystyrene beads is 1 to 5 mm.
KR1020040109899A 2004-12-21 2004-12-21 Manufacturing Method of Polyurethane Foam Panel with Polystyrene Bead KR100648651B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0631841A (en) * 1992-07-15 1994-02-08 Kubota Corp Preparation of composite panel
KR20000012343A (en) * 1999-11-27 2000-03-06 장인익 A porosity building materials and its manufacturing method
KR20040028735A (en) * 2001-04-09 2004-04-03 토요 보세키 가부시기가이샤 Polyurethane composition and polishing pad

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0631841A (en) * 1992-07-15 1994-02-08 Kubota Corp Preparation of composite panel
KR20000012343A (en) * 1999-11-27 2000-03-06 장인익 A porosity building materials and its manufacturing method
KR20040028735A (en) * 2001-04-09 2004-04-03 토요 보세키 가부시기가이샤 Polyurethane composition and polishing pad

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