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WO2017213481A1 - Corps moulé et son procédé de fabrication - Google Patents

Corps moulé et son procédé de fabrication Download PDF

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Publication number
WO2017213481A1
WO2017213481A1 PCT/KR2017/006085 KR2017006085W WO2017213481A1 WO 2017213481 A1 WO2017213481 A1 WO 2017213481A1 KR 2017006085 W KR2017006085 W KR 2017006085W WO 2017213481 A1 WO2017213481 A1 WO 2017213481A1
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WO
WIPO (PCT)
Prior art keywords
molded article
temperature
molded body
humidity
molded
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2017/006085
Other languages
English (en)
Korean (ko)
Inventor
노상현
이명
유다영
임지원
김원
송동민
정승문
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LX Hausys Ltd
Original Assignee
LG Hausys Ltd
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.)
Filing date
Publication date
Priority claimed from KR1020170072737A external-priority patent/KR102243567B1/ko
Application filed by LG Hausys Ltd filed Critical LG Hausys Ltd
Priority to EP17810604.3A priority Critical patent/EP3470220B1/fr
Publication of WO2017213481A1 publication Critical patent/WO2017213481A1/fr
Priority to US16/214,586 priority patent/US10981341B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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 molded article and a method for producing the same.
  • the molded article of the nonwoven fiber structure is not only used for hygiene or medical use, such as disposable diapers, but is widely applied from household materials to industrial materials.
  • the molded article of the nonwoven fiber structure is manufactured by a method such as a needle punch, hot air secondary bond, etc., the molded article has flexibility and light weight, but due to its low hardness, it is difficult to apply to various fields such as living materials and industrial materials.
  • the density is low, the physical properties such as flexural strength and tensile strength are not high, and when a strong load is applied from the outside, it easily bends or tears, such as living materials or industrial materials. There was a problem that it is difficult to secure the physical properties that can be applied to the back.
  • the moisture penetrating into the molded article increases, and thus there is a problem in that physical properties of the molded article, for example, bending strength and tensile strength, are lowered.
  • the present inventors use a non-hygroscopic resin as a binder in a dry process rather than a wet process, even if used for a long time in a high temperature and high humidity environment, the physical properties of the molded body, for example, bending strength or tensile strength
  • the study was carried out on a molded article which does not degrade, and as a result, the present invention was completed.
  • Another object of the present invention is to provide a molded article having high physical properties such as flexural strength and tensile strength and having a small weight change due to moisture absorption even by long-term use.
  • a molded article of a nonwoven fiber structure comprising a polyester-based fiber and a binder, wherein the binder is a non-moisture heat adhesive resin, the molded article has an apparent density of 0.5 to 0.8 g / cm 3 , and the molded article has a temperature and relative temperature of 85 ° C.
  • a molded article is provided having a rate of change in flexural strength of less than 10% after 100 hours constant temperature / humidity at 85% humidity.
  • the molded article may have a rate of change in flexural strength after constant temperature / humidity at 100 ° C. at 85 ° C. and a relative humidity of 85% for less than 5%.
  • the molded article may have a weight change rate of less than 0.1% after 100 hours constant temperature / humidity at 85 ° C. temperature and 85% relative humidity.
  • the molded body may have a weight change rate of less than 0.08% after constant temperature / humidity at 100 ° C. at 85 ° C. and 85% relative humidity.
  • the molded body may have a flexural strength of 20 MPa or more and a tensile strength of 50 to 80 MPa.
  • the molded body may have a flexural stiffness of 1.0 to 1.5 GPa and a tensile stiffness of 1.0 to 1.8 GPa.
  • the molded article may have a tensile elongation of 10 to 30%.
  • the molded body 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% after constant temperature / humidity for 100 hours at 85 ° C. temperature and 85% relative humidity.
  • the binder may have a melting point of 160 ° C or more.
  • the molded body is a structural member for home use; Architectural interior and exterior boards; Automotive interior and exterior materials; Interior and exterior materials for trains, ships and aircraft; Partition boards; Or an elevator structural material.
  • this invention provides the sandwich panel containing the said molded object.
  • the molded article according to the present invention has a small difference in physical properties between the outer surface and the inner core, high physical properties such as flexural strength and tensile strength, less weight change due to moisture absorption even after long-term use in a high temperature and high humidity environment, It has little change in flexural strength and tensile strength, so it is used for structural materials for home appliances (TV back cover, washing machine board, etc.), interior and exterior boards for building, interior and exterior materials for automobiles, interior and exterior materials for train / ship / aircraft, various partition boards, elevator structural materials, etc. Suitable for
  • FIG. 1 is a photograph of the molded body according to the present invention observed by field emission-scanning electron microscopy (FE-SEM).
  • a molded article of a nonwoven fiber structure comprising a polyester-based fiber and a binder, the binder is a non-wet heat adhesive resin, the molded article has an apparent density of 0.5 ⁇ 0.8g / cm 3 , the molded article is 85 °C
  • a molded article is provided having a rate of change in flexural strength of less than 10% after 100 hours constant temperature / humidity at 85% temperature and relative humidity.
  • the density was low and the physical properties such as bending strength and tensile strength were not high.
  • the moisture penetrating into the molded body increases as it is used for a long time in a high temperature and high humidity environment, and thus there is a problem that the physical properties of the molded body, such as bending strength and tensile strength, are lowered. .
  • the inventors of the present invention by using a non-hygroscopic copolymer resin as a binder and manufacturing a molded body by a dry process, even if the long-term use in a high temperature and high humidity environment, there is little weight change due to moisture absorption, changes in flexural strength and tensile strength, etc. The production of molded articles suitable for use in household materials, industrial materials, etc. has been reduced.
  • the molded article according to the invention has a nonwoven fiber structure, comprising polyester fibers and a binder. Since the molded article of the present invention has a nonwoven fiber structure in which fibers are entangled with each other, natural pores are included in the molded article, so that the air permeability is good and the weight 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 molded article 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 molded body 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 molded body, the dispersion of the fiber is not made smoothly, the physical properties of the molded body may be reduced.
  • the binder contained in the molded article according to the present invention is a non-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, and specifically, based on the molded article of the present invention manufactured using the resin, 85 ° C. temperature and 85% relative humidity.
  • the weight change rate (that is, the increase rate of moisture content) of the molded body after being left to stand for 100 hours at 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 molded article 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 molded article 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 mechanical strength sufficient for use in household materials, industrial materials, and the like.
  • the molded article according to the present invention has a flexural strength of 20 MPa or more and a tensile strength of 50 to 80 MPa, and has excellent mechanical strength. Flexural strength of the molded body is measured on the basis of ASTM D790, tensile strength of the molded body is measured on the basis of ASTM D638.
  • the molded article 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 rigidity of the molded body is measured on the basis of ASTM D790, and tensile strength of the molded body is measured on the basis of ASTM D638.
  • the molded article 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 molded body is measured on the basis of ASTM D638, the peel strength of the molded body is measured on the basis of KSF 4737.
  • the molded article according to the present invention has a rate of change in flexural strength after a constant temperature / humidity at 100 ° C. at 85 ° C. and a relative humidity of 85% for less than 10%.
  • the binder that fuses the fibers in the nonwoven fibers increases the weight by absorbing moisture that penetrates into the molded article as it is used for a long time in a high temperature and high humidity environment.
  • the binding properties of the binder decreases in response to water, thereby lowering the adhesiveness between fibers and lowering the bending strength or the tensile strength.
  • the molded article according to the present invention is manufactured by using a non-hygroscopic resin as a binder in a dry process rather than a wet process, so that even if used for a long time in a high temperature and high humidity environment, there is little change in weight due to moisture absorption, and the flexural strength or tension of the molded body There was no problem that intensity
  • the said interfiber adhesion rate means the ratio of the fiber fused by the binder, when the polyester fiber in a molded object is fused by the said binder and forms a nonwoven fiber structure.
  • the molded article according to the present invention may have a thermal conductivity of 0.03 to 0.075 W / m ⁇ K. Since the molded body has a low thermal conductivity as described above, heat insulation is increased. However, the conventional molded article also used a method of lowering the apparent density of the molded article in order to lower the thermal conductivity, but when the apparent density is lowered, problems such as bending strength, tensile strength, flexural rigidity, tensile stiffness and tensile elongation are inferior. Occurred.
  • the structural member for home appliances (TV back cover, board for washing machine, etc.), interior and exterior boards for building, interior and exterior materials for automobiles, interior and exterior materials for train / ship / aircraft (partitioner) Boards, etc.), various partition boards, elevator structural materials, and the like.
  • the molded article 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 molded article according to the present invention, since the resin of the sheath portion remains unmelted in the step of preparing the molded article 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 part of the sheath-core bicomponent fiber may use the same nonhygroscopic copolymer resin as the binder contained in the molded article 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%.
  • a polyester fiber is produced by copolymerizing a diol-based monomer having high crystallinity and excellent elasticity with an acid component capable of imparting flexibility, and satisfying the water absorption.
  • 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 molded body can be manufactured by a dry process, thereby facilitating the production of a high density molded body.
  • 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 molded article according to the present invention may further include a filler such as glass fiber, carbon fiber, polymer fiber and the like.
  • a flame retardant such as bromine-based organic flame retardant.
  • additives such as impact modifiers and heat stabilizers.
  • the method for producing the molded article according to the present invention may be prepared by the following method.
  • 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 core type) mixing the bicomponent fibers, 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 ° C. and a pressure condition of 1 to 10 MPa to produce a molded body.
  • 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.
  • 2 to 10 manufactured nonwoven fabrics may be mounted in a plurality of unwinding apparatuses according to the number, and then moved to a heating press for manufacturing a molded article.
  • 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.
  • step c) a plurality of nonwoven fabrics moved to the hot press is heated and pressed under a temperature condition of 170 to 210 °C and a pressure condition of 1 to 10 MPa to produce a molded body.
  • 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 molded product 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 that the moldability is deteriorated when the molded body is bent or deep drawing.
  • the physical properties of the manufactured molded article are the same as those of the molded article 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 rate of change in flexural strength after constant temperature / humidity at 100 ° C. at 85 ° C. and 85% relative humidity may be less than 10%.
  • the present invention provides a sandwich panel comprising the molded body.
  • Sandwich panel according to the present invention the core layer 10 composed of the molded body according to the present invention; 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 core layer 10 of the sandwich panel according to the present invention is composed of the molded body according to the present invention described above. It is preferable that the thickness of the said core layer is 0.1-10 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 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.
  • 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., which is a curing temperature of the epoxy resin, for about 5 to 2 hours, and may be performed at room temperature for about 1 to 10 hours.
  • 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 molded article 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 molded product having a thickness of 5.5 mm was prepared by heating / pressing for 2 minutes.
  • 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).
  • a molded article was prepared.
  • PET Polyethylene terephthalate
  • a polyethylene film which is a hygroscopic copolymer, was placed between the nonwoven fabrics, and then the nonwoven fabric was transferred to a double belt press at a speed of 5 m / min.
  • the heating temperature of the double belt press was 110 ° C.
  • the pressure was 5 MPa
  • a molded product 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, high temperature water vapor was injected in the thickness direction of the card web by the steam injection nozzle, and a molded article having a thickness of 5.5 mm was produced by passing through the web thickness adjusting roll.
  • the density was measured three times using an electronic hydrometer (VIBRA, DME-220E) and then measured as an average value.
  • Example 1 Example 2 Comparative Example 1 Comparative Example 2 first After 100 hours first After 100 hours first After 100 hours first After 100 hours thickness 5.52 5.53 5.54 5.55 5.52 5.54 5.54 5.55 density 0.671 0.671 0.668 0.667 0.671 0.669 1.170 1.169 weight 231.65 231.80 231.36 231.52 231.41 231.76 405.07 405.58 Weight change * 0.065 0.069 0.151 0.126 Flexural Strength (MD) 28.95 27.9 22.2 21 23.5 22.3 28.5 26.1 (MD) Change Rate ** -3.76 -5.71 -5.38 -9.20 Flexural Strength (TD) 29.8 28.5 28 26.6 24.2 22.7 31.1 27.4 (TD) Change Rate ** -4.56 -5.26 -6.61 -13.50
  • the molded article prepared in Examples 1 to 2 was found to have a very small decrease in flexural strength despite long-term use in a high temperature and high humidity environment.
  • Comparative Examples 1 to 2 in which the hygroscopic copolymer was manufactured by a wet process, it was found that the flexural strength was severely degraded as it was used for a long time in a high temperature and high humidity environment.
  • the comparative examples 1 to 2 in which the hygroscopic copolymer was manufactured by a wet process, showed a large change in weight compared to Examples 1 to 2 as the long-term use in a high temperature and high humidity environment.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention concerne un corps moulé et son procédé de fabrication. Le corps moulé, selon la présente invention, présente non seulement une excellente rigidité mécanique, mais a également montré une faible dégradation de sa propriété physique même lorsque le corps moulé avait servi pendant une durée prolongée dans un environnement à température élevée et à humidité élevée. Par conséquent, le corps moulé est approprié pour être utilisé dans un matériau vivant, un matériau industriel ou similaire.
PCT/KR2017/006085 2016-06-10 2017-06-12 Corps moulé et son procédé de fabrication Ceased WO2017213481A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17810604.3A EP3470220B1 (fr) 2016-06-10 2017-06-12 Corps moulé
US16/214,586 US10981341B2 (en) 2016-06-10 2018-12-10 Molded object and method for manufacturing the same

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR20160072149 2016-06-10
KR10-2016-0072149 2016-06-10
KR1020170072737A KR102243567B1 (ko) 2016-06-10 2017-06-09 성형체 및 그의 제조방법
KR1020170072767A KR102243568B1 (ko) 2016-06-10 2017-06-09 성형체 및 그의 제조방법
KR10-2017-0072737 2017-06-09
KR10-2017-0072767 2017-06-09

Related Parent Applications (1)

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PCT/KR2017/006079 Continuation-In-Part WO2017213477A1 (fr) 2016-06-10 2017-06-12 Corps moulé et son procédé de fabrication

Related Child Applications (1)

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PCT/KR2017/006082 Continuation-In-Part WO2017213479A1 (fr) 2016-06-10 2017-06-12 Corps moulé et son procédé de production

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WO2017213481A1 true WO2017213481A1 (fr) 2017-12-14

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008108295A1 (fr) * 2007-03-08 2008-09-12 Kuraray Kuraflex Co., Ltd. Tissu non-tissé
KR20090009222A (ko) * 2006-03-31 2009-01-22 구라레 구라후렛쿠스 가부시키가이샤 부직 섬유 구조를 갖는 성형체
JP2013063605A (ja) * 2011-09-20 2013-04-11 Nitto Denko Corp ポリマー部材の製造方法およびポリマー部材
KR101465595B1 (ko) * 2013-07-11 2014-11-27 한국생산기술연구원 흡습-발수성 부직포 적층체
JP2015071794A (ja) * 2012-02-29 2015-04-16 王子ホールディングス株式会社 繊維強化プラスチック成形体用シート及びその成形体

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090009222A (ko) * 2006-03-31 2009-01-22 구라레 구라후렛쿠스 가부시키가이샤 부직 섬유 구조를 갖는 성형체
WO2008108295A1 (fr) * 2007-03-08 2008-09-12 Kuraray Kuraflex Co., Ltd. Tissu non-tissé
JP2013063605A (ja) * 2011-09-20 2013-04-11 Nitto Denko Corp ポリマー部材の製造方法およびポリマー部材
JP2015071794A (ja) * 2012-02-29 2015-04-16 王子ホールディングス株式会社 繊維強化プラスチック成形体用シート及びその成形体
KR101465595B1 (ko) * 2013-07-11 2014-11-27 한국생산기술연구원 흡습-발수성 부직포 적층체

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