KR20160105602A - Sandwich panel and method of producing the same - Google Patents

Sandwich panel and method of producing the same Download PDF

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Publication number
KR20160105602A
KR20160105602A KR1020150028134A KR20150028134A KR20160105602A KR 20160105602 A KR20160105602 A KR 20160105602A KR 1020150028134 A KR1020150028134 A KR 1020150028134A KR 20150028134 A KR20150028134 A KR 20150028134A KR 20160105602 A KR20160105602 A KR 20160105602A
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KR
South Korea
Prior art keywords
metal plate
thermosetting resin
sandwich panels
foam
resin foam
Prior art date
Application number
KR1020150028134A
Other languages
Korean (ko)
Inventor
지승욱
이응기
최철준
김명희
김지문
박건표
Original Assignee
(주)엘지하우시스
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Application filed by (주)엘지하우시스 filed Critical (주)엘지하우시스
Priority to KR1020150028134A priority Critical patent/KR20160105602A/en
Priority to PCT/KR2016/001742 priority patent/WO2016137193A1/en
Publication of KR20160105602A publication Critical patent/KR20160105602A/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/7608—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising a prefabricated insulating layer, disposed between two other layers or panels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Laminated Bodies (AREA)

Abstract

Provided are a sandwich panel and a method of manufacturing the same, wherein the sandwich panel comprises, in the following order: a front surface metal plate; a heat curable resin foaming agent; and a rear surface metal plate having perforations formed therein.

Description

≪ Desc / Clms Page number 1 > SANDWICH PANEL AND METHOD OF PRODUCING THE SAME <

To a sandwich panel and a manufacturing method thereof.

In general, sandwich panels are often used because of their low cost and ease of application as a building insulation. Such a sandwich panel is manufactured by inserting a heat insulating material or the like between a front plate and a rear plate, and a foam is used as a heat insulating material. If the front plate, the back plate and the foam are separately manufactured and adhered by an adhesive process, the process is complicated, time and cost are consumed, and productivity is lowered. When the foamable composition is injected between the front plate and the back plate and foamed and cured to produce the sandwich panel, water and volatile organic compounds (VOC) are generated during the foaming and curing of the foamable composition, The foaming cells of the foam can not be uniformly formed and partially collapsed, and the foam can not be firmly adhered to the front plate and the back plate.

In one embodiment of the present invention, there is provided a sandwich panel that provides excellent fairness, good thermal insulation, and excellent durability.

In another embodiment of the present invention, a method of manufacturing the sandwich panel is provided.

In one embodiment of the present invention, the front metal plate; A thermosetting resin foam; And a rear metal plate on which a perforation hole is formed.

The average diameter of the perforation holes may be from about 0.1 mm to about 2.0 mm.

The spacing between the perforation holes may be between about 0.5 mm and about 1.0 mm.

4,000 to 5,000 holes may be formed per unit area of about 1 m 2 .

The area ratio of the perforation holes among the total area of the one surface of the rear metal plate may be about 0.1% to about 1.0%.

The antioxidant layer may be further laminated on one side or both sides of the thermosetting resin foam.

The antioxidant layer may include at least one selected from the group consisting of a phenol antioxidant, a phosphite antioxidant, a thioether antioxidant, an amine antioxidant, and combinations thereof.

The front metal plate and the rear metal plate may each include at least one member selected from the group consisting of an aluminum plate, a steel plate, and a combination thereof.

The steel sheet may include at least one selected from the group consisting of an aluminum sheet, a galvanized sheet, a galvalume sheet, a stainless steel sheet, and a combination thereof.

The thermosetting resin foam may include at least one selected from the group consisting of a polyurethane foam, an epoxy foam, a phenol foam, a polyisocyanurate foam, and combinations thereof.

The average diameter of the foamed cells of the thermosetting resin foam may be about 50 탆 to about 250 탆.

The density of the thermosetting resin foam may be from about 25 kg / m 3 to about 50 kg / m 3 .

The thermal conductivity of the sandwich panel may be about 0.025 W / mk or less.

Each of the front metal plate and the rear metal plate may have a thickness of about 0.5 mm to about 1.5 mm.

The thickness of the thermosetting resin foam may range from about 30 mm to about 150 mm as a layer interposed between the front metal plate and the back metal plate.

In another embodiment of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: preparing a front metal plate; Preparing a rear surface metal plate having perforated holes formed therein by perforating treatment; Injecting a foamable composition between the front metal plate and the back metal plate; And a step of applying heat to the injected foamable composition to foam and cure the sandwich panel.

An antioxidant layer may be formed on at least one surface of the front metal plate, the rear metal plate, or all of them.

In the step of injecting the foamable composition, the front metal plate and the rear metal plate may be disposed opposite to each other, and the oxidation preventing layer may be formed on at least one of a pair of facing surfaces.

The sandwich panel can realize excellent processability, excellent heat insulation and excellent durability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a rear metal plate having perforated holes formed in a sandwich panel according to an embodiment of the present invention; FIG.
2 is a schematic cross-sectional view of a sandwich panel according to one embodiment of the present invention.
3 is a schematic cross-sectional view of the sandwich panel further comprising an antioxidant layer.
4 is a schematic process flow diagram of a method of manufacturing a sandwich panel according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. In the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggerated.

Hereinafter, the formation of any structure in the "upper (or lower)" or the "upper (or lower)" of the substrate means that any structure is formed in contact with the upper surface (or lower surface) of the substrate However, the present invention is not limited to not including other configurations between the substrate and any structure formed on (or under) the substrate.

In one embodiment of the present invention, the front metal plate; A thermosetting resin foam; And a rear metal plate on which a perforation hole is formed.

Generally, the sandwich panel is manufactured by separately fabricating the front plate, the foam, and the rear plate, and sequentially stacking them, thereby complicating the manufacturing process and consuming a lot of time and cost. In addition, when the sandwich panel is cut and used as required, the front plate, the back plate, and the foam are separated or partially cracked during the cutting to cause deterioration in durability and heat insulation.

In addition, when a foamable composition is injected between the front plate and the back plate and foamed and cured to form a sandwich panel, moisture and volatile organic compounds are generated during foaming and curing of the foamable composition and they can not be discharged to the outside, There is a problem that the foam cell structure of the foam may be unevenly formed or broken down due to the pressure of the loaded gas, the front plate, the back plate and the foam can not be firmly adhered to each other and the gap is easily formed, thereby decreasing durability and heat insulation.

In the sandwich panel according to the embodiment of the present invention, a perforation hole is not formed in the front metal plate to provide a smooth surface appearance, but a perforation hole is formed in the rear metal plate, so that the front metal plate and the rear metal plate The water and volatile organic compounds generated during the foaming and curing of the foamable composition can be easily discharged through the perforation holes of the rear metal plate.

As described above, by discharging the moisture and the volatile organic compound, the foaming cells of the thermosetting resin foam are formed more compact and uniformly, and the thermosetting resin foam, the front metal plate and the rear metal plate are each firmly adhered have.

As a result, in the sandwich panel, the time and cost are reduced by omitting the laminating process, the heat insulating property and the durability are effectively improved, and when the sandwich panel is cut and used as required, Therefore, there is an advantage that excellent processability, excellent heat insulation, and excellent durability can be realized at the same time.

FIG. 2 is a schematic cross-sectional view of a sandwich panel 100 according to an embodiment of the present invention, and specifically includes a front metal plate 110; A thermosetting resin foam 130; And a rear metal plate 120 on which a perforation hole 121 is formed.

In one embodiment, high durability can be maintained by using the front metal plate 110 and the rear metal plate 120 made of metal as the front plate and the rear plate, and the durability of the rear metal plate 120 can be maintained The boreholes 121 can be stably formed without breaking or cracking unlike bells, wood, and the like.

The front metal plate 110 and the rear metal plate 120 may include at least one member selected from the group consisting of an aluminum plate, a steel plate, and a combination thereof.

The steel sheet may include at least one selected from the group consisting of, for example, an aluminum steel sheet, a galvanized steel sheet, a galvalume steel sheet, a stainless steel sheet, and a combination thereof to improve the corrosion resistance.

Fig. 1 shows a schematic diagram of the rear metal plate 120. Fig. The rear metal plate 120 is perforated to form a perforation hole 121. The perforation treatment may be performed by a method known in the art, for example, a punching machine, a perforator, or an air jet, but the present invention is not limited thereto.

The average diameter of the perforation holes 121 may be, for example, from about 0.1 mm to about 2.0 mm, and preferably from about 0.5 mm to about 1.0 mm.

By having the average diameter within the above range, the foamable composition is foamed and cured to easily release moisture and volatile organic compounds generated in the process of forming the thermosetting resin foamed body 130, and the foamed composition can be stably foamed The foamed cells of the thermosetting resin foam 130 can be formed small and uniformly and adhesion between the front metal plate 110 and the back metal plate 120 and the thermosetting resin foam 130 can be improved .

The distance d between the perforation holes 121 may be, for example, about 0.5 mm to about 1.0 mm. Moisture and volatile organic compounds generated in the process of forming the thermosetting resin foam 130 are easily discharged at a uniform discharge rate as a whole, The durability of the rear metal plate 120 can be maintained at a high level.

The distance d between the perforation holes 121 means the shortest length among the lengths of the straight lines connecting the perforation holes 121. For example, The shortest length of the straight line connecting any point forming the perimeter of the perforation hole 121 can be indicated.

The spacing d between the perforation holes 121 may be all the same within the above range, but the present invention is not limited thereto, and may be formed in various combinations within the range according to the object and nature of the invention.

The perforation hole 121 may be formed, for example, in a range of 4,000 to 5,000 per 1 m 2 of the unit area. The number of the perforations per unit area within the above range allows the durability of the rear metal plate 120 to be maintained at a high level while sufficiently discharging moisture and volatile organic compounds generated in the process of forming the thermosetting resin foam 130.

The area ratio of the perforation hole 121 to the entire surface of the back metal plate 120 may be, for example, about 0.1% to about 1.0%. By occupying the area ratio within the above range, the durability of the rear metal plate 120 is maintained at a high level while sufficiently discharging moisture and volatile organic compounds generated in the process of forming the thermosetting resin foam 130, and excellent heat insulation and excellent durability Can be implemented simultaneously.

The thermosetting resin foamed body 130 may be formed by foaming and heat-expanding a foamable composition comprising a polymerizable compound, a foaming agent, or both, including at least one selected from the group consisting of a foamable and thermosetting monomer, oligomer, resin, But it is not limited thereto.

The foamable composition may further contain other additives such as a flame retardant and a surfactant depending on the purpose and use of the invention.

The polymerizable compound may include at least one selected from the group consisting of a polyurethane compound, an epoxy compound, a phenol compound, a polyisocyanurate compound, and a combination thereof.

The blowing agent may include, for example, at least one selected from the group consisting of a chlorofluorocarbon-based, hydrogenated chlorofluorocarbon-based, hydrocarbon-based blowing agent, and combinations thereof, or may be an inert gas, A variety of foaming agents known in the art can be used. The inert gas may include, but is not limited to, argon, nitrogen, helium, and the like.

The thermosetting resin foam 130 may include at least one selected from the group consisting of, for example, a polyurethane foam, an epoxy foam, a phenol foam, a polyisocyanurate foam, and combinations thereof.

Specifically, the thermosetting resin foam 130 may further include the phenol-based foam, the polyisocyanurate-based foam, or both, to further improve the flame retardancy.

In particular, when the phenolic foam is included, toxic gases such as cyanide gas are not discharged when a fire occurs, so that excellent flame retardancy and environment friendliness can be achieved at the same time. As described above, since the structure of the sandwich panel 100 is maintained for a long time and the toxic gas is not discharged even if a fire occurs due to the improvement of the flame retardancy, a time and a path for escaping from the fire can be secured thereby realizing excellent stability .

The average diameter of the foamed cells of the thermosetting resin foam 130 may be, for example, about 50 탆 to about 250 탆. By having an average diameter within the above range, the size of the foamed cell is appropriate, and the thermal conductivity is low, so that excellent heat insulation can be realized.

The density of the thermosetting resin foam 130 may be, for example, from about 25 kg / m 3 to about 50 kg / m 3 . Air bubbles containing, for example, foaming gas are appropriately contained in the thermosetting resin foam 130 so as to prevent the heat transfer inside the foam 130, so that the structure of the thermosetting resin foam 130 has a low thermal conductivity It can be maintained firmly and excellent heat insulation and excellent durability can be realized.

The thermal conductivity of the sandwich panel 100 may be, for example, about 0.025 W / mk or less, and may also be, for example, about 0.022 W / mk to about 0.025 W / mk, 0.0 > W / mk. ≪ / RTI > By having the thermal conductivity within the above range, the heat transfer or conduction can be effectively reduced to realize excellent heat insulation.

The thickness of each of the front metal plate 110 and the rear metal plate 120 may be, for example, about 0.5 mm to about 1.5 mm. By having the thickness within the above range, the thickness of the sandwich panel 100 is not excessively increased, and the durability can be improved while improving the space efficiency.

The thickness of the thermosetting resin foam 130 as a layer interposed between the front metal plate 110 and the rear metal plate 120 may be, for example, about 30 mm to about 150 mm. By having the thickness within the above range, the thickness of the sandwich panel 100 is not excessively increased, so that it is possible to realize excellent heat insulation while improving space efficiency.

In one embodiment, the thermosetting resin foam 130 may further include an antioxidant layer stacked on one side or both sides of the foam 130. That is, the front metal plate 110, the rear metal plate 120, or both of them; And the thermosetting resin foam 130 may further include the oxidation preventing layer. 3 is a schematic cross-sectional view of a sandwich panel 100 further comprising the antioxidant layer between the back metal plate 120 and the thermosetting resin foam.

The sandwich panel 200 shown in FIG. 3 sequentially includes the front metal plate 210, the thermosetting resin foam 230, the oxidation preventing layer 240, and the rear metal plate 220 on which the perforation holes 221 are formed do.

The antioxidant layer 240 may further include an antioxidant layer 240 to prevent contact between the front metal plate 210 and the rear metal plate 220 and an acidic substance contained in the foamable composition forming the thermosetting resin foam 230, It is possible to prevent corrosion of the substrate. Since the adhesion between the antioxidant layer 240 and the thermosetting resin foam 230 is greater than the adhesion between the front metal plate 210, the rear metal plate 220 and the thermosetting resin foam 230, the antioxidant layer 240 ), The durability can be effectively improved.

The antioxidant layer 240 may be formed of a coating liquid containing an antioxidant, and the antioxidant-containing coating liquid may include a thermosetting resin, a photocurable resin, or a binder resin containing both of them, and an antioxidant, The resin and the photocurable resin may be of any kind known in the art, and are not particularly limited.

Accordingly, the antioxidant layer 240 may include at least one selected from the group consisting of phenol-based antioxidants, phosphite-based antioxidants, thioether-based antioxidants, amine-based antioxidants, And may contain an inhibitor. Specifically, it may include at least one selected from the group consisting of alkyl phenols, alkylene bisphenols, alkyl phenol thioethers, aromatic amines, and combinations thereof, but is not limited thereto, and may include various kinds of antioxidants known in the art Can be used.

4 schematically shows a process flow diagram of a method of manufacturing the sandwich panel according to another embodiment of the present invention.

In another embodiment of the present invention, there is provided a method comprising: (S1) preparing a front metal plate; (S2) of preparing a rear surface metal plate having perforated holes by perforating treatment; (S3) injecting a foamable composition between the front metal plate and the rear metal plate; And (S4) applying heat to the injected foamable composition to foam and cure the sandwich panel.

As described above, since the perforation hole is not formed in the front metal plate to provide a smooth surface appearance, the perforation hole is formed in the rear metal plate to inject the foamable composition between the front metal plate and the rear metal plate having the perforated hole, And moisture and volatile organic compounds generated during the curing process can be easily discharged through the perforation holes of the rear metal plate.

As the moisture and the volatile organic compound are discharged, the foamed cells of the thermosetting resin foam are formed more compactly and uniformly, and the thermosetting resin foam, the front metal plate and the rear metal plate are each firmly adhered to each other .

As a result, the sandwich panel manufactured by the above-described manufacturing method omits the laminating process, which saves time and cost, effectively improves heat insulation and durability, and when the sandwich panel is cut and used as required, It is possible to prevent the generation of a gap, so that there is an advantage that excellent processability, excellent heat insulation property and excellent durability can be realized at the same time.

The front metal plate and the rear metal plate may be formed of a material including at least one selected from the group consisting of an aluminum plate, a steel plate, and a combination thereof. The steel sheet may include at least one selected from the group consisting of, for example, an aluminum steel sheet, a galvanized steel sheet, a galvalume steel sheet, a stainless steel sheet, and a combination thereof to improve the corrosion resistance.

The rear metal plate is perforated to form a perforation hole. The perforation treatment may be performed by a method known in the art, for example, a punching machine, a perforator, or an air jet, but the present invention is not limited thereto.

The average diameter of the perforation holes may be, for example, about 0.1 mm to about 2.0 mm, and may be about 0.5 mm to about 1.0 mm. The interval between the perforation holes may be, for example, about 0.5 mm to about 1.0 mm. The mean diameter and spacing of the perforation holes are as described above in one embodiment.

For example, the perforation hole may have an area ratio of 4,000 to 5,000 per 1m 2 , and the area ratio of the perforated hole to the entire surface of the back metal plate may be, for example, about 0.1% to about 1.0 %. ≪ / RTI > The number and area ratio of the perforation holes per unit area are as described above in one embodiment.

The foamable composition may include a polymerizable compound comprising at least one selected from the group consisting of a foamable and thermosetting monomer, an oligomer, a resin, and a combination thereof, a foaming agent, or both, and heat is applied to the foamable composition The thermosetting resin foam can be formed by foaming and thermosetting.

The foaming and thermosetting may occur simultaneously, and may be performed, for example, by heating at a temperature of from about 50 캜 to about 90 캜 for about 20 minutes to 30 minutes, but are not limited thereto.

The foamable composition may further contain other additives such as a flame retardant, a surfactant, and the like.

The polymerizable compound may include at least one selected from the group consisting of a polyurethane compound, an epoxy compound, a phenol compound, a polyisocyanurate compound, and a combination thereof.

The blowing agent may include, for example, at least one selected from the group consisting of a chlorofluorocarbon blowing agent, a hydrogenated chlorofluorocarbon blowing agent, a hydrocarbon blowing agent, and a combination thereof, or may be an inert gas, but is not limited thereto A variety of blowing agents known in the art can be used. The inert gas may include, but is not limited to, argon, nitrogen, helium, and the like.

The thermosetting resin foam may include at least one selected from the group consisting of, for example, a polyurethane foam, an epoxy foam, a phenolic foam, a polyisocyanurate foam, and combinations thereof.

Specifically, the thermosetting resin foam may include the phenol-based foam, the polyisocyanurate foam, or both of them to improve the flame retardancy.

In particular, when the phenolic foam is included, toxic gases such as cyanide gas are not discharged when a fire occurs, so that excellent flame retardancy and environment friendliness can be achieved at the same time. As described above, since the flame retardancy is improved, the structure of the sandwich panel is maintained for a long time and toxic gas is not discharged even if a fire occurs, so that the time and route for evacuating the fire can be ensured and excellent stability can be realized.

The average diameter of the foamed cells of the thermosetting resin foam formed by foaming and curing the foamable composition may be, for example, about 50 탆 to about 250 탆. By having an average diameter within the above range, the size of the foamed cell is appropriate, and the thermal conductivity is low, so that excellent heat insulation can be realized.

The density of the thermosetting resin foam formed by foaming and curing the foamable composition may be, for example, from about 25 kg / m 3 to about 50 kg / m 3 . By forming at a density within the above-mentioned range, air which hinders heat transfer inside the thermosetting resin foam, for example, air bubbles in which foaming gas is present is suitably contained, the thermal conductivity is low and the structure of the thermosetting resin foam is firmly maintained, And excellent durability can be realized.

The thermal conductivity of the sandwich panel produced according to the above manufacturing method can be, for example, about 0.025 W / mk or less, specifically about 0.022 W / mk to about 0.025 W / mk. By having the thermal conductivity within the above range, the heat transfer or conduction can be effectively reduced to realize excellent heat insulation.

Each of the front metal plate and the rear metal plate may be prepared to have a thickness of, for example, about 0.5 mm to about 1.5 mm. By providing the thickness within the above range, the thickness of the sandwich panel is not excessively increased, so that space efficiency can be improved while excellent durability can be realized.

As a layer interposed between the front metal plate and the rear metal plate, the thermosetting resin foam may be formed to a thickness of, for example, about 30 mm to about 150 mm. By providing the thickness within the above range, the thickness of the sandwich panel is not excessively increased, and it is possible to realize excellent heat insulation while improving space efficiency.

The method may further include forming an oxidation-preventing layer on at least one surface of the front metal plate, the rear metal plate, or both of the front metal plate and the rear metal plate.

The foamable composition may be injected between the front metal plate and the rear metal plate so as to be in contact with the side of the surface on which the antioxidant layer is formed.

In this way, by injecting the foamable composition so as to be in contact with the surface on which the antioxidant layer is formed, contact between the acidic substance, which may be contained in the foamable composition, and the front metal plate and the rear metal plate can be prevented and corrosion thereof can be prevented. In addition, since the adhesive strength between the antioxidant layer and the thermosetting resin foam is greater than the adhesive force between the front metal plate, the rear metal plate, and the thermosetting resin foam, the antioxidant layer can be more firmly adhered to improve durability.

The antioxidant layer may include, for example, a phenol type, a phosphite type, a thioether type, an amine type antioxidant and the like, and specifically includes an alkylphenol, an alkylenebisphenol, an alkylphenolthioether, an aromatic amine, And combinations thereof. However, the present invention is not limited thereto, and various antioxidants known in the art may be used.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

Hereinafter, examples and comparative examples of the present invention will be described. The following embodiments are only examples of the present invention, and the present invention is not limited to the following embodiments.

( Example )

Example  One

A front metal plate was prepared from a steel sheet having a thickness of 0.8 mm and a rear metal plate was prepared by forming a perforation hole in a steel sheet having a thickness of 0.8 mm using a perforating machine. The average diameter of the perforated hole was 0.5mm, the spacing between the perforated hole was 0.5mm, was formed 4,000 per unit area of 1m 2, the perforated holes are accounted for 0.5% of the area ratio of the total area of the one surface of the back plate Respectively. Further, a foamable composition was prepared by mixing and stirring a polyurethane-based compound, a hydrocarbon-based foaming agent, and diphenylmethane diisocyanate (MDI).

Next, the front metal plate and the rear metal plate were separated from each other by 50 mm. The foamable composition was injected thereinto, and then heat-treated at 50 ° C for 20 minutes to foam and cure to form a thermosetting resin foam. The thickness of the thermosetting resin foam was 50 mm.

Comparative Example 1 (No punching was performed on the back metal plate)

A sandwich panel was manufactured under the same conditions and in the same manner as in Example 1, except that a steel sheet having a thickness of 0.8 mm was not subjected to a piercing process to prepare a rear surface metal sheet on which no perforation holes were formed.

Comparative Example 2 (a metal plate and a foam were separately prepared and then adhered with an adhesive)

A front metal plate was prepared from a steel plate having a thickness of 0.8 mm and a rear metal plate was prepared from a steel plate having a thickness of 1.2 mm. Also, a foamable composition was prepared by mixing and stirring a polyurethane-based compound, a hydrocarbon-based foaming agent and diphenylmethane diisocyanate (MDI), and the foamable composition was heat-treated at 50 ° C for 20 minutes to foam and cure, A thermosetting resin foam was prepared.

Subsequently, the front metal plate, the thermosetting resin foam, and the rear metal plate were laminated using a urethane adhesive to produce a sandwich panel.

evaluation

The average diameter of the foamed cells contained in the thermosetting resin foam included in the sandwich panel of Example 1 and Comparative Examples 1 and 2, the density and the thermal conductivity of the thermosetting resin foam were measured according to the following measuring methods, And each of the sandwich panels of Example 1 and Comparative Examples 1 and 2 was measured for separation or crevice occurrence at the time of cutting.

<Average Diameter of Bubble Cell>

Measurement method: Each specimen of the thermosetting resin foam cut into a size of 2.5 mm x 2.5 mm x 2.5 mm was measured using an electron microscope (FE-SEM) according to the conditions of ASTM D2842-69.

<Density of Foam>

Measurement method: The mass and volume of each specimen of the thermosetting resin foam cut into a size of 200 mm x 200 mm x 50 mm were measured, and the mass of the specimen was divided by the volume of the specimen to calculate the density.

<Thermal Conductivity>

Measurement method: Each specimen of the thermosetting resin foam cut into a size of 200 mm × 200 mm × 50 mm was measured using a thermal conductivity meter (EKO) at an average temperature of 23 ° C. according to the measurement conditions of KS L 9016.

<Separation or Creation of Clearance at Cutting>

Measuring method: Cutting was performed using a cutter (Makida, circular saw) with a size of 200 mm x 200 mm x 50 mm, and the cut surface was visually observed to determine separation or occurrence of a crevice.

In the case of separation or crevice, it is indicated by "○", and when it has not occurred, it is indicated by "X".

Average diameter (탆) of foam cells Density of the foam (kg / m 3 ) Example 1 200 40 Comparative Example 1 260 40 Comparative Example 2 260 40

Thermal Conductivity of Sandwich Panel (W / mk) Separation or crevices on cutting Example 1 0.023 X Comparative Example 1 0.025 ○ Comparative Example 2 0.025 ○

As shown in Table 1 above. In the case of the sandwich panel according to Example 1, since the average diameter of the foam cells is formed to be smaller, the heat conductivity is low, and even more firmly adheres to the front metal plate and the rear metal plate, As a whole. In addition, the stacking step is omitted, and the time and cost can be further reduced.

On the other hand, in the case of the sandwich panel according to Comparative Examples 1 and 2, it was clearly confirmed that the average diameter of the foamed cells was formed to be larger, so that the thermal conductivity was high and the heat- In addition, in the case of Comparative Example 2, a lamination process was included, which consumed more time and money.

100, 200: sandwich panel
110, 210: front metal plate
120, 220: rear metal plate
130, 230: thermosetting resin foam
121, 221: perforated hole
240: antioxidant layer
d: spacing between perforated holes

Claims (18)

Front metal plate; A thermosetting resin foam; And a rear metal plate on which a perforation hole is formed.
The method according to claim 1,
Wherein the average diameter of the perforation holes is 0.1 mm to 2.0 mm
Sandwich panels.
The method according to claim 1,
Wherein a distance between the perforation holes is 0.5 mm to 1.0 mm
Sandwich panels.
The method according to claim 1,
4,000 to 5,000 perforated holes are formed per unit area of 1 m &lt; 2 &gt;
Sandwich panels.
The method according to claim 1,
Wherein an area ratio occupied by the perforation holes in the entire area of one surface of the rear surface metal sheet is 0.1% to 1.0%
Sandwich panels.
The method according to claim 1,
Further comprising an antioxidant layer laminated on one surface or both surfaces of the thermosetting resin foam
Sandwich panels.
The method according to claim 6,
Wherein the antioxidant layer comprises at least one selected from the group consisting of a phenol antioxidant, a phosphite antioxidant, a thioether antioxidant, an amine antioxidant, and combinations thereof
Sandwich panels.
The method according to claim 1,
Wherein the front metal plate and the rear metal plate each include at least one selected from the group consisting of an aluminum plate, a steel plate, and a combination thereof
Sandwich panels.

9. The method of claim 8,
The steel sheet includes at least one selected from the group consisting of an aluminum sheet, a galvanized sheet, a galvalume sheet, a stainless steel sheet and a combination thereof
Sandwich panels.
The method according to claim 1,
Wherein the thermosetting resin foam comprises at least one selected from the group consisting of a polyurethane-based foam, an epoxy-based foam, a phenol-based foam, a polyisocyanurate-based foam, and combinations thereof
Sandwich panels.

The method according to claim 1,
Wherein the foamed cells of the thermosetting resin foam have an average diameter of 50 mu m to 250 mu m
Sandwich panels.
The method according to claim 1,
Wherein the thermosetting resin foam has a density of 25 kg / m 3 to 50 kg / m 3
Sandwich panels.
The method according to claim 1,
Wherein the sandwich panel has a thermal conductivity of 0.025 W / mk or less
Sandwich panels.
The method according to claim 1,
Wherein each of the front metal plate and the rear metal plate has a thickness of about 0.5 mm to about 1.5 mm
Sandwich panels.
The method according to claim 1,
A layer interposed between the front metal plate and the back metal plate, wherein the thermosetting resin foam has a thickness of about 30 mm to about 150 mm
Sandwich panels.
Preparing a front metal plate;
Preparing a rear surface metal plate having perforated holes formed therein by perforating treatment;
Injecting a foamable composition between the front metal plate and the back metal plate; And
Applying heat to the injected foamable composition to foam and cure the foamed composition;
&Lt; / RTI &gt;
17. The method of claim 16,
An antioxidant layer is formed on at least one surface of the front metal plate, the rear metal plate,
Method of manufacturing a sandwich panel.
17. The method of claim 16,
In the step of injecting the foamable composition, the front metal plate and the rear metal plate are disposed opposite to each other, and the antioxidant layer is formed on at least one of a pair of facing surfaces
Method of manufacturing a sandwich panel.

KR1020150028134A 2015-02-27 2015-02-27 Sandwich panel and method of producing the same KR20160105602A (en)

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