WO2017213480A1 - Panneau sandwich et son procédé de production - Google Patents

Panneau sandwich et son procédé de production Download PDF

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Publication number
WO2017213480A1
WO2017213480A1 PCT/KR2017/006084 KR2017006084W WO2017213480A1 WO 2017213480 A1 WO2017213480 A1 WO 2017213480A1 KR 2017006084 W KR2017006084 W KR 2017006084W WO 2017213480 A1 WO2017213480 A1 WO 2017213480A1
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WO
WIPO (PCT)
Prior art keywords
sandwich panel
core layer
adhesive
layer
core
Prior art date
Application number
PCT/KR2017/006084
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English (en)
Korean (ko)
Inventor
김원
이명
유다영
임지원
노상현
송동민
정승문
Original Assignee
(주)엘지하우시스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from KR1020170072757A external-priority patent/KR102066544B1/ko
Application filed by (주)엘지하우시스 filed Critical (주)엘지하우시스
Publication of WO2017213480A1 publication Critical patent/WO2017213480A1/fr
Priority to US16/215,020 priority Critical patent/US11198273B2/en
Priority to US16/861,855 priority patent/US11225056B2/en
Priority to US16/861,815 priority patent/US11001035B2/en
Priority to US16/861,719 priority patent/US11260626B2/en
Priority to US17/230,211 priority patent/US11772362B2/en

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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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a sandwich panel and a method of manufacturing the same.
  • Conventional sandwich panels have similar structural rigidity to metal panels and are effective in weight reduction, and thus are used in various fields such as building materials.
  • the sandwich panel forms a core layer between skin layers formed of aluminum, iron, or the like to control the physical properties of the panel.
  • a foamed resin material in the core layer to increase the weight reduction effect of the panel, or by using a general resin, composite or balsa wood material to increase the mechanical strength of the panel.
  • such a sandwich panel has a problem that it is difficult to secure high-density, high flexural strength, tensile strength, and the like properties sufficient to be used as a packaging material for protecting a heavy cargo.
  • the present inventors have studied a sandwich panel using a molded article having high density and improved physical properties such as bending strength and tensile strength, and as a result, the present invention has been completed.
  • an object of the present invention is to provide a sandwich panel having high mechanical strength by using a core layer having a high density and high physical properties such as bending strength and tensile strength.
  • a core layer of nonwoven fiber structure comprising polyester fibers and a binder, having an apparent density of 0.5 to 0.8 g / cm 3 ;
  • the binder may be a non-hygroscopic copolymer resin or a hygroscopic copolymer resin.
  • the core layer may have a flexural stiffness of 1.0 to 1.5 GPa and a tensile stiffness of 1.0 to 1.8 GPa.
  • the core layer may have a tensile elongation of 10 to 30%.
  • the core layer may be in the range of 150 ⁇ 200 N peel strength.
  • the polyester fiber may be any one or more selected from the group consisting of polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate.
  • PET polyethylene terephthalate
  • polytrimethylene terephthalate polytrimethylene terephthalate
  • polybutylene terephthalate polyethylene naphthalate
  • the non-hygroscopic copolymer resin may have a weight change rate of less than 0.1% of the molded body after standing for 100 hours at 85 °C temperature and 85% relative humidity.
  • the polyester fiber may have a melting point of 180 ⁇ 300 °C.
  • the binder may have a melting point of 160 ° C or more.
  • the core layer, the core part (core part) of the polyester fiber And a sheath-core type bicomponent fiber comprising a sheath part, which is a non-hygroscopic copolymer resin surrounding the core part.
  • the thickness of the core layer may be 0.1 to 10mm.
  • the thickness of the skin layer may be 0.1 to 0.5mm.
  • the skin layer may be any one or more selected from the group consisting of aluminum, iron, stainless steel (SUS), magnesium, and electro-galvanized steel sheet (EGI).
  • the adhesive layer may include at least one of an olefin adhesive, a urethane adhesive, an acrylic adhesive, and an epoxy adhesive.
  • the present invention comprises a) preparing a core layer of a nonwoven fiber structure, comprising a polyester fiber and a binder, the apparent density is 0.5 ⁇ 0.8g / cm 3 ; b) forming an adhesive layer by applying an adhesive to at least one surface of the core layer; And c) forming a skin layer on the adhesive layer.
  • the core layer, the adhesive and the skin layer may be laminated, and then photocured or thermally cured to form a skin layer.
  • thermosetting may be performed at 50 to 110 for 5 minutes to 2 hours, or at room temperature for 1 to 10 hours.
  • the sandwich panel according to the present invention has high mechanical strength by using a core layer having a high density and high physical properties such as flexural strength and tensile strength, structural materials for home appliances (TV back cover, washing board, etc.), building interior and exterior boards It is suitable for use in automobile interior and exterior materials, interior / exterior materials for train / ship / aircraft, various partition boards and elevator structural materials.
  • FIG. 1 schematically illustrates a sandwich panel according to the present invention.
  • Figure 2 is a photograph of the core layer of the sandwich panel according to the present invention observed by field emission-scanning electron microscopy (FE-SEM).
  • FE-SEM field emission-scanning electron microscopy
  • Figure 3 is a photograph of the cross-section of the sandwich panel according to the present invention by Field Emission-Scanning Electron Microscopy (FE-SEM).
  • FE-SEM Field Emission-Scanning Electron Microscopy
  • a sandwich panel according to the present invention includes a polyester layer and a binder, and has an apparent density of 0.5 to 0.8 g / cm 3 , the core layer 10 of the nonwoven fiber structure; A skin layer 20 laminated on at least one surface of the core layer; And an adhesive layer for bonding the core layer and the skin layer.
  • the inventors of the present invention by producing a sandwich panel using a core layer of a nonwoven fiber structure containing a polyester-based fiber and a binder, the apparent density is 0.5 ⁇ 0.8g / cm 3 , the flexural strength and tensile strength of the manufactured panel
  • the apparent density is 0.5 ⁇ 0.8g / cm 3
  • the flexural strength and tensile strength of the manufactured panel In addition to improving the physical properties of the back and the like, even if used for a long time in a high temperature and high humidity environment there is almost no change in various physical properties, it has led to the manufacture of sandwich panels suitable for use as living materials, industrial materials and the like.
  • the core layer 10 of the sandwich panel according to the present invention comprises a polyester fiber and a binder, and has a nonwoven fiber structure having an apparent density of 0.5 to 0.8 g / cm 3 .
  • the core layer according to the present invention has a nonwoven fiber structure in which fibers are entangled with each other, all or part of the polyester-based fibers are fused by the binder, so that natural pores are contained in the core layer, and breathable This becomes good and weight reduction can be improved. That is, since the fibers have natural pores formed while tangling with each other, unlike the case of artificially forming pores by an additive such as a blowing agent, manufacturing costs can be reduced, and the foaming process can be omitted, thereby increasing process efficiency. .
  • the average length of the polyester fiber included in the core layer according to the present invention is preferably 5 ⁇ 100mm, when the average length of the fiber is less than 5mm, it may be difficult to expect the effect of high elongation due to the short length of the fiber. . On the contrary, when it exceeds 100 mm, the space occupied by the gap of the core layer can be reduced because the content of the fibers entangled with each other increases. In addition, when it exceeds 100mm, during the manufacture of the core layer, the dispersion of the fiber is not made smoothly, the physical properties of the core layer may be reduced.
  • the binder included in the core layer may be a non-hygroscopic copolymer resin or a hygroscopic copolymer resin.
  • the non-absorbent copolymer resin used in the present invention refers to a resin having a property of not absorbing moisture in the air, specifically, 85 °C temperature and relative to the molded article of the present invention prepared using the resin
  • the weight change rate (that is, the increase rate of water content) of the molded body after being left to stand at 85% of humidity for 100 hours can be used that is less than 0.1%, preferably less than 0.08%, more preferably less than 0.07%.
  • the moisture absorption of the PET fibers contained in the molded body is less than 0.05%
  • the weight change rate of the molded body is more than 0.05%
  • the non-absorbent copolymer resin used in the present invention is a weight change rate (ie, an increase in moisture content) of the molded article after being left to stand at 85 ° C. temperature and 85% relative humidity for 100 hours based on the final molded article. It is meant to have a low water absorption, preferably less than 0.08%, more preferably less than 0.07%.
  • non-hygroscopic copolymer resin a polyester fiber, a diol-based monomer having excellent crystallinity and excellent elasticity, and an acid component capable of providing flexibility can be copolymerized together.
  • the polyester fiber may be used any one or more selected from the group consisting of polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, neo- diol monomers
  • PET polyethylene terephthalate
  • polytrimethylene terephthalate polybutylene terephthalate
  • polyethylene naphthalate polyethylene naphthalate
  • neo- diol monomers In the group consisting of pentyl glycol, diethylene glycol, ethylene glycol, poly (tetramethylene) glycol, 1,4-butanediol, 1,3-propanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol
  • Any one or more selected may be used, and as the acid component, any one or more selected from the group consisting of isophthalic acid, adipic acid, 2,6-naphthalenedicarbox
  • All or part of the polyester fiber included in the core layer according to the present invention is fused by a binder that is a non-hygroscopic resin, the binder may have a melting point of 160 ° C or more.
  • the core layer according to the present invention has an apparent density of 0.5 to 0.8 g / cm 3 . Since it satisfies the density range, it may have a sufficient mechanical strength for use in the packaging material of a large cargo.
  • the core layer according to the present invention has flexural strength of 20 MPa or more, and tensile strength of 50 to 80 MPa, and has excellent mechanical strength. Flexural strength of the core layer is measured on the basis of ASTM D790, tensile strength of the core layer is measured on the basis of ASTM D638.
  • the core layer according to the present invention has excellent mechanical rigidity in the range of flexural stiffness (Flexural Modulus) is 1.0 ⁇ 1.5 GPa, the tensile stiffness (Tension Stiffness) is 1.0 ⁇ 1.8 GPa. Flexural stiffness of the core layer is measured on the basis of ASTM D790, tensile strength of the core layer is measured on the basis of ASTM D638.
  • the core layer according to the present invention has a tensile elongation in the range of 10 to 30%, a peel strength in the range of 150 to 200 N, and does not easily tear even when an external force is applied.
  • Tensile elongation of the core layer is measured on the basis of ASTM D638, the peel strength of the core layer is measured on the basis of KSF 4737.
  • the core layer according to the present invention satisfies the mechanical strength as described above, the core layer is included in a sandwich panel, and includes a structural member (TV back cover, a board for a washing machine, etc.), a building interior and exterior board, a vehicle interior and exterior material, a train / ship, etc. / It can be used as interior and exterior materials for aircraft (boards such as partitions), boards for various partitions, and elevator structural materials.
  • a structural member TV back cover, a board for a washing machine, etc.
  • a building interior and exterior board a vehicle interior and exterior material
  • a train / ship etc.
  • It can be used as interior and exterior materials for aircraft (boards such as partitions), boards for various partitions, and elevator structural materials.
  • the core layer according to the present invention may further include a sheath-core type bicomponent fiber.
  • the sheath-core bicomponent fiber may include a core part of a polyester fiber; And a sheath part which is a non-hygroscopic copolymer resin surrounding the core part.
  • the sheath-core bicomponent fiber may be included in the core layer according to the present invention since the resin of the sheath portion remains in an unmelted state, which has been introduced at the manufacturing stage of the core layer according to the present invention.
  • the core part of the cis-core bicomponent fiber may be any one or more selected from the group consisting of polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate. have.
  • PET polyethylene terephthalate
  • polytrimethylene terephthalate polytrimethylene terephthalate
  • polybutylene terephthalate polyethylene naphthalate
  • the sheath portion may use the same nonhygroscopic copolymer resin as the binder contained in the core layer according to the present invention.
  • the non-absorbent copolymer resin refers to a resin having a property of not absorbing moisture in the air, and specifically, based on the molded article of the present invention manufactured using the resin, 100 ° C. at 85 ° C. and 85% relative humidity.
  • the weight change rate (that is, the rate of increase in moisture content) of the molded article after being left to stand for time can be used less than 0.1%, preferably less than 0.08%, more preferably less than 0.07%.
  • the moisture absorption of the PET fibers contained in the molded body is less than 0.05%
  • the weight change rate of the molded body is more than 0.05%
  • the non-absorbent copolymer resin used in the present invention is a weight change rate (ie, an increase in moisture content) of the molded article after being left to stand at 85 ° C. temperature and 85% relative humidity for 100 hours based on the final molded article. It is meant to have a low water absorption, preferably less than 0.08%, more preferably less than 0.07%.
  • non-absorbing copolymer resin a polyester fiber, a diol-based monomer having excellent crystallinity and excellent elasticity, and an acid component capable of providing flexibility can be copolymerized together, and one that satisfies the water absorption can be used.
  • the polyester fiber may be used any one or more selected from the group consisting of polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, neo- diol monomers
  • PET polyethylene terephthalate
  • polytrimethylene terephthalate polybutylene terephthalate
  • polyethylene naphthalate polyethylene naphthalate
  • neo- diol monomers In the group consisting of pentyl glycol, diethylene glycol, ethylene glycol, poly (tetramethylene) glycol, 1,4-butanediol, 1,3-propanediol, 1,6-hexanediol, 1,4-cyclohexanedimethanol
  • Any one or more selected may be used, and as the acid component, any one or more selected from the group consisting of isophthalic acid, adipic acid, 2,6-naphthalenedicarbox
  • the sheath-core bicomponent fiber is produced by melt spinning and stretching using the components of the core portion and the components of the sheath portion.
  • the non-hygroscopic resin when used as the sheath component of the sheath-core bicomponent fiber, the flexural strength and the tensile strength can be improved, and the core layer can be manufactured by a dry process, thereby facilitating the production of a high density core layer.
  • the packaging material of a large cargo or the like even in an atmosphere of high temperature and high humidity, the physical properties and form retaining properties are good, it is possible to prevent the phenomenon of sagging of the nonwoven fabric.
  • the core layer according to the present invention may further include a filler such as glass fiber, carbon fiber, polymer fiber and the like.
  • a filler such as glass fiber, carbon fiber, polymer fiber and the like.
  • it may further comprise a flame retardant such as bromine-based organic flame retardant.
  • a flame retardant such as bromine-based organic flame retardant.
  • additives such as impact modifiers and heat stabilizers.
  • the core layer manufacturing method according to the present invention may be prepared by the following method.
  • the method for producing the core layer according to the present invention comprises a) a sheath part which is a non-hygroscopic copolymer resin surrounding the core part and core part of (A) polyester fiber and (B) polyester fiber. mixing a sheath-core type bicomponent fiber comprising a part), and then heating and pressing to prepare a nonwoven fabric; b) mounting the manufactured nonwoven fabric to a plurality of unwinding devices, and then moving to a hot press; And c) heating and pressing a plurality of nonwoven fabrics moved to the hot press under a temperature condition of 170 to 210 and a pressure condition of 1 to 10 MPa to produce a core layer.
  • a sheath-core comprising a core part of (A) polyester fiber and (B) polyester fiber and a sheath part which is a non-hygroscopic copolymer resin surrounding the core part.
  • Non-woven fabrics are prepared by mixing the sheath-core type bicomponent fibers followed by heating and pressing.
  • (A) polyester-based fibers and B) cis-core bicomponent fibers can be mixed in a weight ratio of 1:99 to 80:20.
  • the content of the B) cis-core bicomponent fiber is less than the above range, the fusion between the fibers may not be sufficient, resulting in poor physical properties of the nonwoven fabric.
  • a method of manufacturing a nonwoven fabric by heating and pressing may be used, but a conventional method of manufacturing a nonwoven fabric may be used.
  • a heat press to 160 to Non-woven fabric may be prepared by thermal bonding at a temperature of 210 ° C. for 5 seconds to 30 seconds.
  • step b) the manufactured nonwoven fabric is mounted on a plurality of unwinding devices, and then moved to a hot press.
  • the prepared nonwoven fabric 2 to 10 sheets can be mounted in a plurality of unwinding devices according to the number, and then moved to a heating press for core layer production.
  • a plurality of nonwoven fabrics are used using a plurality of unwinding apparatuses as described above, the thickness of each nonwoven fabric becomes thin, so that the length of the nonwoven fabric wound in one unwinding apparatus becomes long. Therefore, since the number of times of use of the soft bomber for connecting the nonwovens continuously input during the continuous process can be reduced, there is an advantage that the process can be simplified.
  • the core layer is manufactured by heating and pressing a plurality of nonwoven fabrics moved to the hot press under a temperature condition of 170 to 210 ° C. and a pressure condition of 1 to 10 MPa.
  • the heating press used in step c) is not particularly limited as long as it is generally used in the industry, and as a specific example, a double belt press may be used.
  • the core layer prepared in step c) may be manufactured to a thickness of 0.1 to 10 mm. If the thickness is less than 0.1mm, there is a problem that it is difficult to maintain excellent mechanical strength, and if the thickness exceeds 10mm, there is a problem in that moldability is lowered when bending the core layer or forming a deep drawing. Physical properties of the prepared core layer are the same as those of the core layer of the present invention.
  • step d) preheating for 3 to 10 minutes at a temperature condition of 160 to 210 °C may further include.
  • step c) when the preheating step is further included as described above, since heat energy is applied to the non-absorbing copolymer resin of the sheath portion of the cis-core bicomponent fiber in the nonwoven fabric, the heating and pressing step of step c) can be shortened. There is an advantage.
  • the thickness of the core layer according to the present invention described above is preferably 0.1 to 10mm. If the thickness is less than 0.1mm, there is a problem that it is difficult to maintain excellent mechanical strength, and if the thickness exceeds 10mm, there is a problem that the moldability is lowered when bending the sandwich panel or forming a deep drawing.
  • Skin layer 20 of the sandwich panel according to the present invention may be formed of a metal material, preferably selected from the group consisting of aluminum, iron, stainless steel (SUS), magnesium and electro-galvanized steel sheet (EGI). It may include one or more. For example, in order to have excellent moldability and flexural rigidity, the skin layer 20 including the electrogalvanized steel sheet (EGI) may be applied to the sandwich panel. In addition, to reduce the weight, the skin layer 20 including aluminum may be applied to the sandwich panel.
  • a metal material preferably selected from the group consisting of aluminum, iron, stainless steel (SUS), magnesium and electro-galvanized steel sheet (EGI). It may include one or more.
  • the skin layer 20 including the electrogalvanized steel sheet (EGI) may be applied to the sandwich panel.
  • the skin layer 20 including aluminum may be applied to the sandwich panel.
  • the thickness of the skin layer 20 may be 0.1 ⁇ 0.5mm. If the thickness is less than 0.1mm, it is difficult to maintain the structural rigidity of the skin layer, if the thickness exceeds 0.5mm, the weight reduction effect of the sandwich panel is reduced, there is a problem that the raw material cost increases.
  • the adhesive layer of the sandwich panel according to the present invention is applied between the core layer 10 and the skin layer 20 to adhere the core layer 10 and the skin layer 20. It is preferable to apply the adhesive layer to a uniform thickness in consideration of viscosity.
  • the core layer 10 and the skin layer 20 are laminated, and then cured to produce a sandwich panel. At this time, as the adhesive penetrates into the core layer 10 during curing, not only chemical bonding with the components constituting the core layer 10, but also the adhesive force between the skin layer 20 and the core layer 10 by mechanical bonding. This has the effect of being improved.
  • the chemical bond means that the adhesive becomes covalent bonds with the upper and lower surfaces of the core layer, hydrogen bonds, van der Waals bonds, ionic bonds, and the like.
  • the mechanical bond refers to a form in which an adhesive penetrates the core layer and is physically hung as if the rings are hung from each other. This form is also called mechanical interlocking. Referring to FIG. 3, it can be seen that the adhesive penetrates the upper and lower surfaces of the core layer 10 by the natural pores included in the core layer 10.
  • the adhesive constituting the adhesive layer may include at least one of an olefin adhesive, a urethane adhesive, an acrylic adhesive, and an epoxy adhesive.
  • the olefinic adhesive may be used one or more selected from the group consisting of polyethylene, polypropylene and amorphous polyalphaolefin adhesives.
  • the urethane-based adhesive can be used without limitation as long as the adhesive includes a urethane structure (-NH-CO-O-).
  • the acrylic adhesive may include one or more of a polymethyl methacrylate adhesive, a hydroxy group-containing polyacrylate adhesive, and a carboxyl group-containing polyacrylate adhesive.
  • the epoxy adhesive may be formed of at least one of bisphenol-A epoxy adhesives, bisphenol-F epoxy adhesives, novolac epoxy adhesives, linear aliphatic epoxy resins, and cycloaliphatic epoxy resins. It may include.
  • the adhesive may include a photocurable adhesive, a hot melt adhesive, or a thermosetting adhesive, and any one of a photocuring method and a thermosetting method may be used.
  • a sandwich panel can be manufactured by thermosetting the laminated body containing a skin layer, a core layer, and an adhesive agent. The thermosetting may be performed at 50 to 110 ° C. for about 5 minutes to 2 hours at the curing temperature of the epoxy resin, and may be cured for about 1 to 10 hours at room temperature.
  • the adhesive layer may be applied to a thickness of approximately 20 ⁇ 300 ⁇ m, but is not limited thereto.
  • the adhesive layer may be applied to one surface of the skin layer 30 using any one of a die coating method, a gravure coating method, a knife coating method, or a spray coating method.
  • the skin layer 20, the core layer 10, and the skin layer 20 are sequentially stacked, and after the lamination step, a curing and pressing step may be performed. It is not limited.
  • the sandwich panel according to the present invention is excellent in moldability as well as mechanical strength by using a core layer having good mechanical properties.
  • high density and high physical properties such as flexural strength and tensile strength, less weight change due to moisture absorption even after long-term use, less change in flexural strength and tensile strength, etc. Boards), building interior and exterior boards, automobile interior and exterior materials, train / ship / aircraft interior and exterior materials (boards such as partitions), various partition boards, and elevator structural materials.
  • PET Polyethylene terephthalate
  • RPF 4 fine denier, fiber length 51mm
  • sheath-core PET fiber Toray Chemical, EZBON-L, fine 4 denier, sheath
  • the mixed fibers were carded with a roller carding machine and heat-bonded at a temperature of 190 ° C. for 10 seconds using a heating press to prepare a nonwoven fabric.
  • the nonwoven was then transferred to a double belt press at a speed of 5 m / min.
  • the heating temperature of the double belt press was 180 ° C.
  • the pressure was 5 MPa
  • a core layer having a thickness of 5.5 mm was prepared by heating / pressing for 2 minutes.
  • a core layer was manufactured in the same manner as in Example 1, except that the polyethylene terephthalate (PET) fiber and the cis part were mixed with a cis-core type PET fiber which is a non-hygroscopic resin at a weight ratio of 50:50.
  • PET polyethylene terephthalate
  • sheath portion was a non-hygroscopic resin sheath-core PET fiber (Toray Chemical Co., EZBON-L, fineness 4 denier, sheath portion melting point 110 ° C, fiber length 64 mm).
  • the core layer was prepared.
  • PET Polyethylene terephthalate
  • a polyester-based hot melt adhesive film which is a hygroscopic copolymer, was placed between the nonwoven fabrics, and then the nonwoven fabric was double belt pressed at a speed of 5 m / min. Press).
  • the heating temperature of the double belt press was 110 ° C.
  • the pressure was 5 MPa
  • a core layer having a thickness of 5.5 mm was prepared by heating / pressing for 2 minutes.
  • PET polyethylene terephthalate
  • Toray Chemical, RPF, fineness 4 denier, fiber length 51mm carded with roller carding machine to prepare a card web. After six sheets of this web were stacked, they were transferred to a conveyor belt provided with a steam spray nozzle. Thereafter, hot steam was injected into the thickness direction of the card web by the steam injection nozzle, and the core layer having a thickness of 5.5 mm was produced by passing through the web thickness adjusting roll.
  • PET polyethylene terephthalate
  • PET fibers instead of PET fibers, a mixture of polyethylene (PE) resin and magnesium hydroxide (Mg (OH) 2 ) was extruded to prepare a core layer having a melting point of 130 ° C.
  • PE polyethylene
  • Mg (OH) 2 magnesium hydroxide
  • the laminated result is thermally cured at 100 °C sandwich Panels were prepared.
  • a sandwich panel was manufactured in the same manner as in Example 1, except that the core layer prepared in Preparation Example 2 was used.
  • a sandwich panel was manufactured in the same manner as in Example 1, except that the core layer prepared in Preparation Example 3 was used.
  • a sandwich panel was manufactured in the same manner as in Example 1, except that the core layer prepared in Comparative Preparation Example 1 was used.
  • a sandwich panel was manufactured in the same manner as in Example 1, except that the core layer prepared in Comparative Preparation Example 2 was used.
  • a sandwich panel was manufactured in the same manner as in Example 1, except that the core layer prepared in Comparative Preparation Example 3 was used with a thickness of 0.8 mm.
  • a sandwich panel was manufactured in the same manner as in Example 1, except that the core layer prepared in Comparative Preparation Example 3 was used with a thickness of 6.0 mm and the skin layer was formed with a thickness of 1.0 mm.
  • Bending strength (N / mm 2 ): The bending rigidity of the sandwich panel was measured by the 3-point-bending method using KS F4737. INSTRON 5569A was used as a measuring instrument.
  • Example Comparative example One 2 3 One 2 3 4 Flexural strength 293 285 275 261 262 253 177 Flexural rigidity 170 168 160 150 152 145 102 Flexural strength 118 112 109 101 99 102 71 Weight reduction 44 44 43 43 42 42 60
  • Comparative Examples 1 and 2 prepared by a wet process using a hygroscopic copolymer resin, and a core layer mixed with polyethylene (PE) resin and magnesium hydroxide (Mg (OH) 2 )
  • PE polyethylene
  • Mg (OH) 2 magnesium hydroxide

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un panneau sandwich et son procédé de production. Le panneau sandwich selon la présente invention a une densité élevée et des propriétés de matériau améliorées, telles qu'une résistance à la flexion, une résistance à la traction, une rigidité à la flexion, un taux de réduction du poids et analogue, et est ainsi approprié pour être utilisé comme matériau domestique et industriel.
PCT/KR2017/006084 2016-06-10 2017-06-12 Panneau sandwich et son procédé de production WO2017213480A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US16/215,020 US11198273B2 (en) 2016-06-10 2018-12-10 Sandwich panel and a manufacturing method thereof
US16/861,855 US11225056B2 (en) 2016-06-10 2020-04-29 Sandwich panel and a manufacturing method thereof
US16/861,815 US11001035B2 (en) 2016-06-10 2020-04-29 Sandwich panel and a manufacturing method thereof
US16/861,719 US11260626B2 (en) 2016-06-10 2020-04-29 Sandwich panel and a manufacturing method thereof
US17/230,211 US11772362B2 (en) 2016-06-10 2021-04-14 Sandwich panel and a manufacturing method thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2016-0072149 2016-06-10
KR20160072149 2016-06-10
KR10-2017-0072757 2017-06-09
KR1020170072757A KR102066544B1 (ko) 2016-06-10 2017-06-09 샌드위치 패널 및 그의 제조방법

Related Parent Applications (1)

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PCT/KR2017/006081 Continuation-In-Part WO2017213478A1 (fr) 2016-06-10 2017-06-12 Panneau sandwich et procédé de fabrication dudit panneau

Related Child Applications (2)

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PCT/KR2017/006081 Continuation-In-Part WO2017213478A1 (fr) 2016-06-10 2017-06-12 Panneau sandwich et procédé de fabrication dudit panneau
US16/215,020 Continuation-In-Part US11198273B2 (en) 2016-06-10 2018-12-10 Sandwich panel and a manufacturing method thereof

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114685953A (zh) * 2020-04-30 2022-07-01 华润化学材料科技股份有限公司 改性聚酯材料及由其制成的复合夹芯板及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6080495A (en) * 1997-10-27 2000-06-27 Wright; John Structural panels with metal faces and corrugated plastic core
KR20090009222A (ko) * 2006-03-31 2009-01-22 구라레 구라후렛쿠스 가부시키가이샤 부직 섬유 구조를 갖는 성형체
US20110108218A1 (en) * 2007-11-05 2011-05-12 Flack Leanne O Non-Woven Composite Office Panel
WO2014083200A1 (fr) * 2012-11-30 2014-06-05 Innventia Ab Matériau en sandwich
US20160023440A1 (en) * 2014-07-24 2016-01-28 Recubrimientos Plasticos, S.A. Metal and magnetorheological multi-panel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6080495A (en) * 1997-10-27 2000-06-27 Wright; John Structural panels with metal faces and corrugated plastic core
KR20090009222A (ko) * 2006-03-31 2009-01-22 구라레 구라후렛쿠스 가부시키가이샤 부직 섬유 구조를 갖는 성형체
US20110108218A1 (en) * 2007-11-05 2011-05-12 Flack Leanne O Non-Woven Composite Office Panel
WO2014083200A1 (fr) * 2012-11-30 2014-06-05 Innventia Ab Matériau en sandwich
US20160023440A1 (en) * 2014-07-24 2016-01-28 Recubrimientos Plasticos, S.A. Metal and magnetorheological multi-panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114685953A (zh) * 2020-04-30 2022-07-01 华润化学材料科技股份有限公司 改性聚酯材料及由其制成的复合夹芯板及其制备方法

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