WO2021210856A1 - Puce de résine de polyester pour moussage, feuille de mousse de polyester l'utilisant et son procédé de fabrication - Google Patents

Puce de résine de polyester pour moussage, feuille de mousse de polyester l'utilisant et son procédé de fabrication Download PDF

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Publication number
WO2021210856A1
WO2021210856A1 PCT/KR2021/004501 KR2021004501W WO2021210856A1 WO 2021210856 A1 WO2021210856 A1 WO 2021210856A1 KR 2021004501 W KR2021004501 W KR 2021004501W WO 2021210856 A1 WO2021210856 A1 WO 2021210856A1
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Prior art keywords
polyester resin
mol
foam sheet
melting point
acid
Prior art date
Application number
PCT/KR2021/004501
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English (en)
Korean (ko)
Inventor
최종한
이광희
허미
김우진
하상훈
Original Assignee
주식회사 휴비스
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 KR1020200046660A external-priority patent/KR102372624B1/ko
Priority claimed from KR1020200046655A external-priority patent/KR102372628B1/ko
Priority claimed from KR1020200046663A external-priority patent/KR102372621B1/ko
Application filed by 주식회사 휴비스 filed Critical 주식회사 휴비스
Publication of WO2021210856A1 publication Critical patent/WO2021210856A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/181—Acids containing aromatic rings
    • C08G63/183—Terephthalic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds

Definitions

  • the present invention relates to a polyester resin chip for foaming, a polyester foam sheet using the same, and a method for manufacturing the same.
  • Polyester resins with crystallinity such as polyethylene terephthalate (PET) have superior mechanical properties compared to polyethylene-based resins or polypropylene-based resins, and have excellent heat resistance and chemical resistance, and are used in various fields requiring light weight and high physical properties. This is possible. Polyester resin has excellent mechanical and chemical properties, so it can be used for multi-purpose applications, for example, conventionally for drinking water containers and medical, food packaging, food containers, sheets, films, automobile molded products, etc. applications are being made in the field of
  • PET polyethylene terephthalate
  • a foam sheet containing a polyester resin has a foaming layer composed of a resin composition containing a polyester resin, so it is excellent in light weight and strength, so that it can be used as a sheet-shaped molded article as it is, and three-dimensional such as thermoforming It can be molded into a molded body having a typical shape.
  • the foam sheet containing the polyester resin has the above-mentioned high rigidity, which is excellent in lightness and strength, so it is difficult to give a desired shape by thermoforming or the like, and there is a disadvantage in that it is easily broken.
  • thermoforming since a process such as thermoforming is included when a foam sheet is commercialized, the thermal properties of the polyester resin act as a very important factor.
  • An object of the present invention is to provide a polyester resin chip for foaming having a low melting point, a polyester foam sheet using the same, and a method for manufacturing the same in order to solve the problems of the prior art as described above.
  • Polyester foam sheet is a foam sheet in which 90% or more of the cells are closed cells (DIN ISO4590), and an acid component comprising terephthalic acid and isophthalic acid; and a co-polyester resin of a diol component comprising at least one of ethylene glycol and diethylene glycol, wherein the content of isophthalic acid is 1 to 15 mol% with respect to 100 mol% of the acid component, and the copolymerized polyester
  • the melting point of the resin may be 180 to 255 °C.
  • the content of isophthalic acid may be 1 to 5 mol% with respect to 100 mol% of the acid component, and the melting point of the copolymer polyester resin may be 225 to 255°C.
  • the intrinsic viscosity (IV) of the copolymer polyester resin may be 0.7 to 1.0 dl/g.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is more than 5 to 10 mol% or less, and the melting point of the copolymer polyester resin may be 210 to 240 °C.
  • the intrinsic viscosity (IV) of the copolymer polyester resin may be 0.6 to 0.9 dl/g.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is more than 10 to 15 mol% or less
  • the melting point of the copolymer polyester resin may be 180 to 210 °C.
  • the intrinsic viscosity (IV) of the copolymer polyester resin may be 0.5 to 0.85 dl/g.
  • the present invention also provides a method for manufacturing the polyester resin foam sheet described above.
  • the content of isophthalic acid may be 1 to 5 mol% with respect to 100 mol% of the acid component, and the melting point of the copolymer polyester resin may be 225 to 255°C.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is more than 5 to 10 mol% or less, and the melting point of the copolymer polyester resin may be 210 to 240 °C.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is more than 10 to 15 mol% or less
  • the melting point of the copolymer polyester resin may be 180 to 210 °C.
  • the polyester resin chip for foaming is an acid component comprising terephthalic acid and isophthalic acid; and a co-polyester resin of a diol component comprising at least one of ethylene glycol and diethylene glycol, wherein the content of isophthalic acid is 1 to 15 mol% with respect to 100 mol% of the acid component, and the copolymerized polyester
  • the melting point of the resin may be 180 to 255 °C.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is 1 to 5 mol%
  • the melting point of the copolymer polyester resin may be 225 to 255 °C.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is more than 5 to 10 mol% or less
  • the melting point of the copolymer polyester resin may be 210 to 240 °C.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is more than 10 to 15 mol% or less, and the melting point of the copolymer polyester resin may be 180 to 210 °C.
  • the polyester foam seat according to an embodiment of the present invention includes a copolymerized polyester resin having a low melting point, so that the temperature during extrusion and foaming of the polyester resin can be lowered, and thus processability can be improved.
  • the molding temperature of the foam sheet can also be lowered, so that the moldability of the foam sheet can be improved.
  • a polyester resin chip for foaming according to an embodiment of the present invention includes an acid component including terephthalic acid (TPA) and isophthalic acid (IPA); and a co-polyester resin of a diol component including at least one of ethylene glycol (EG) and diethylene glycol (DEG).
  • TPA terephthalic acid
  • IPA isophthalic acid
  • a co-polyester resin of a diol component including at least one of ethylene glycol (EG) and diethylene glycol (DEG).
  • the content of isophthalic acid may be 1 to 15 mol% based on 100 mol% of the acid component.
  • isophthalic acid as an acid component, amorphousness can be imparted to the polyester resin, and adhesive strength can be improved to a certain level.
  • by adjusting the isophthalic acid in the above range it is possible to lower the melting point of the polyester resin to a certain level, thereby also reducing the foaming temperature.
  • the content of isophthalic acid is less than the above range, the melting point of the resin cannot be reduced, and when it exceeds the above range, the melting point is severely lowered, thereby making it difficult to maintain the viscosity during foaming.
  • the melting point of the copolymer polyester resin may be 180 to 255 °C.
  • adhesive strength may be improved to a certain level, and extrusion and foaming temperatures may be lowered, which is effective in improving processability.
  • the content of isophthalic acid is 1 to 5 mol% based on 100 mol% of the acid component, and specifically may be 2 to 4 mol%, 2.5 to 3.5 mol%, or 2 to 3 mol%.
  • the melting point of the copolymer polyester resin may be 225 to 255 °C.
  • the content of isophthalic acid is more than 5 to 10 mol% with respect to 100 mol% of the acid component, and specifically 6 to 9 mol%, 6.5 to 9 mol%, or 7 to 9 mol%.
  • the melting point of the copolymer polyester resin may be 210 to 240 °C.
  • the content of isophthalic acid with respect to 100 mol% of the acid component is more than 10 to 15 mol%, specifically 11 to 15 mol%, 12 to 15 mol%, or 12 to 14 mol%. have.
  • the melting point of the copolymer polyester resin may be 180 to 210 °C.
  • the degree of crystallinity of the copolymer polyester resin may be 15% or less.
  • the crystallinity of the resin is within the above range, it is possible to prevent temperature rise during foaming and maintain the viscosity in an appropriate range even at a relatively low foaming temperature.
  • the crystallinity of the copolymerized polyester resin may be 15% or less.
  • the crystallinity of the copolymerized polyester resin may be 10% or less.
  • the crystallinity of the copolymerized polyester resin may be 5% or less.
  • the intrinsic viscosity (IV) of the copolymer polyester resin may be 0.5 to 1.0 dl/g.
  • the workability may be improved by lowering the degree of crystallinity.
  • the intrinsic viscosity (IV) of the copolymerized polyester resin may be 0.7 to 1.0 dl/g, and , specifically, the intrinsic viscosity of the resin may be 0.7 to 0.9 dl/g, 0.7 to 0.85 dl/g, or 0.7 to 0.8 dl/g.
  • the intrinsic viscosity (IV) of the co-polyester resin is 0.6 to 0.9 dl/g can be Specifically, the intrinsic viscosity of the resin may be 0.6 to 0.8 dl/g, 0.65 to 0.8 dl/g, or 0.65 to 0.7 dl/g.
  • the intrinsic viscosity (IV) of the copolymerized polyester resin is 0.5 to 0.85 dl/ g, and specifically, the intrinsic viscosity of the resin may be 0.6 to 0.8 dl/g, 0.65 to 0.8 dl/g, or 0.65 to 0.7 dl/g.
  • the degree of crystallinity of the foam sheet comprising the copolymer polyester resin as described above is 5 to 15%, and specifically may be 10 to 15%.
  • the foam sheet having a degree of crystallinity in the above range has the advantage of excellent moldability.
  • the intrinsic viscosity (IV) of the foam sheet is 0.8 to 1.5 dl/g, specifically, may be 1.0 to 1.5 dl/g, or 1.2 to 1.5 dl/g.
  • the average foaming density of the foam sheet according to KS M ISO 845:2012 is 100 to 600 kg/m 3 , 100 to 500 kg/m 3 , 100 to 400 kg/m 3 , 100 to 300 kg/m 3 , 100 to 200 kg/m 3 , 200 to 600 kg/m 3 , 300 to 600 kg/m 3 , 400 to 600 kg/m 3 , or 500 to 600 kg/m 3 .
  • Foam sheet may be more than 90% of the cells are closed cells (DIN ISO4590). This may mean that 90% or more of the cells measured according to DIN ISO4590 of the foam sheet are closed cells.
  • the closed cells in the foam sheet may be 90-100% or 95-100%.
  • Foam sheet can provide a foam sheet satisfying excellent light weight, durability and rigidity by having a closed cell within the above range.
  • the number of cells of the foam sheet may include 1 to 30 cells, 3 to 25 cells, or 3 to 20 cells per 1 mm 2 .
  • the average size of the cells may be in the range of 100 to 700 ⁇ m.
  • the average size of the cells may range from 100 to 600 ⁇ m, from 200 to 600 ⁇ m, or from 300 to 600 ⁇ m.
  • the cell size deviation may be, for example, 5% or less, 0.1 to 5%, 0.1 to 4%, 0.1 to 3%, or 0.1 to 1% range.
  • the average thickness of the foam sheet may be 1.0 to 10 mm.
  • the average thickness of the polyester foam sheet may be 1.0 to 10 mm, 1.0 to 8 mm, 1.0 to 5 mm, 5 to 10 mm, or 7.5 to 10 mm.
  • the present invention also provides a method for manufacturing a foam sheet using the above-described polyester resin chip for foaming.
  • a method of manufacturing a foam sheet according to an embodiment includes an acid component comprising terephthalic acid and isophthalic acid; And preparing a copolymerized polyester resin by esterification and polycondensation reaction of a diol component comprising at least one of ethylene glycol and diethylene glycol; preparing a resin melt by mixing a copolymerized polyester resin chip and a foaming agent; and extruding and foaming the resin melt with an extruder.
  • the content of the isophthalic acid with respect to 100 mol% of the acid component is 1 to 15 mol%, and the melting point of the copolymer polyester resin may be 180 to 255 °C.
  • the content of isophthalic acid is 1 to 5 mol%
  • the melting point of the copolymer polyester resin may be 225 to 255 °C.
  • the content of isophthalic acid is more than 5 to 10 mol%, and the melting point of the copolymer polyester resin may be 210 to 240 °C.
  • the content of isophthalic acid is more than 10 to 15 mol%, and the melting point of the copolymer polyester resin may be 180 to 210 °C.
  • the copolymerized polyester resin includes the same content as the above-described copolymerized polyester resin, and overlapping descriptions will be omitted.
  • Catalysts in the esterification step include acetic acid-based catalysts such as zinc acetate, sodium acetate, and magnesium acetate, tetranormal butoxytitanate, tetraisopropyl titanate, titanium oxide/silica oxide microcopolymer, nanotitanate, etc. and titanium-based catalysts, and these may be used alone or in combination of two or more.
  • the esterification reaction catalyst may be added in the range of 50 to 1000 ppm based on 100 parts by weight of the copolymerized polyester resin, preferably in the range of 200 to 700 ppm. When the amount of catalyst is insufficient, the esterification reaction rate is slowed, and when it is excessive, the thermal stability of the polyester resin is deteriorated.
  • the catalyst used in the polycondensation step examples include antimony catalysts such as antimony trioxide and antimony acetate, or titanium (Ti) such as tetranormal butoxy titanate, tetraisopropyl titanate, titanium oxide/silica oxide microcopolymer, and nano titanate. )-based catalysts are preferably used.
  • the polycondensation catalyst is added in the range of 50 to 2000 ppm, preferably in the range of 300 to 1200 ppm, based on 100 parts by weight of the copolymerized polyester resin. If the amount of the catalyst is insufficient, the polycondensation reaction rate is slowed, so that a copolymer polyester resin having high physical properties cannot be obtained.
  • the resin melt is a matrix comprising 55 to 85% by weight of a polyester resin having a melting point of 200° C. or less and 10 to 40% by weight of a polyolefin resin; And it may include a masterbatch composition comprising 1 to 30% by weight of the polyfunctional compound as a domain dispersed in a matrix.
  • polyfunctional compound examples include pyromellitic anhydride (PMDA), benzophenone dianhydride, 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride, 3,3',4,4'- Biphenyltetracarboxylic dianhydride, bis(3,4-dicarboxyphenyl)ether dianhydride, bis(3,4-dicarboxyphenyl)thioether dianhydride, bisphenol A bisether dianhydride, 2,2-bis(3) , 4-dicarboxyphenyl) hexafluoropropane dianhydride, 2,3,6,7-naphthalene-tetracarboxylic dianhydride, bis (3,4-dicarboxyphenyl) sulfone dianhydride, 1,2,5,6 -naphthalene-tetracarboxylic dianhydride, 2,2',3,3'-biphenyltetracarboxylic dianhydride, hydroquinone
  • the melting point of the polyfunctional compound may be 270 °C or higher, specifically 270 to 350 °C, 270 to 330 °C, 270 to 310 °C, or 270 to 290 °C.
  • the melting point may be 280 ⁇ 5°C.
  • the resin melt contains alkaline earth metal carbonate
  • the cell size of the foam sheet can be reduced and the density can be increased, the sheet surface is uniform to reduce the occurrence of corrugation, and excellent thermoformability can be exhibited.
  • calcium carbonate is uniformly distributed in the polyester resin, the foam sheet obtained by extruding and foaming the resin has high thermal conductivity, so that it is possible to solve the problem of tearing the foam sheet during molding of the foam sheet.
  • the alkaline earth metal carbonate may be an inorganic carbonate containing at least one cation selected from the group consisting of Ca, Mg, and Ba.
  • the inorganic particles containing the alkaline earth metal carbonate may include calcium carbonate (CaCO 3 ), magnesium carbonate (MgCO 3 ) and barium carbonate (BaCO 3 ), and more specifically, the inorganic particles of the present invention include calcium carbonate may include
  • the average size of the inorganic particles may be 1.0 to 5.0 ⁇ m.
  • the average particle size of the inorganic carbonate may be 1.0 to 4.0 ⁇ m, 1.0 to 3.0 ⁇ m, 1.0 to 2.0 ⁇ m, 2.0 to 5.0 ⁇ m, or 3.0 to 5.0 ⁇ m.
  • inorganic particles containing alkaline earth metal carbonate may be mixed with a polyester resin and a masterbatch composition in the form of a masterbatch to prepare a resin melt.
  • Preparing the resin melt may be performed at a temperature of 260 ⁇ 300 °C.
  • the resin melt contains 50 to 95% by weight of a polyester resin; 1-30% by weight of the masterbatch composition; and 1 to 30% by weight of inorganic particles.
  • the content of the masterbatch composition may be 1 to 30% by weight, specifically 1 to 10% by weight, based on the total weight of the resin melt. At this time, when the content of the masterbatch composition is less than 1% by weight, it is difficult to express the desired effect of improving the viscosity of the foamed resin, and when it exceeds 30% by weight, problems such as deterioration of processability may occur.
  • the polyester resin may have the form of pellets, granules, beads, chips, and the like, and in some cases may be in the form of powder.
  • the step of extruding foaming comprises a hydrophilic agent, a heat stabilizer, a waterproofing agent, a cell size enlarger, an infrared damping agent, a plasticizer, a fire protection chemical, a pigment, an elastomeric polymer, an extrusion aid, an antioxidant, an antistatic agent and a UV absorber.
  • One or more additives selected from the group may be introduced into the fluid connection line.
  • additives not added during the fluid connection line may be added during the extrusion process.
  • the heat stabilizer may include a pentavalent and/or trivalent phosphorus compound, or a phenol-based compound having a large chemical structural steric hindrance.
  • the pentavalent and/or trivalent phosphorus compound may include trimethylphosphite, phosphoric acid, phosphorous acid, tris(2,4-di-tert-butylphenyl)phosphite, and the like, and a phenolic compound having a large chemical structural steric hindrance.
  • the compound is pentaerythritol-tetrakis 3- (3,5-di-tert-butyl-4-hydroxyphenyl) propion ester (Pentaerythritol tetrakis (3- (3,5-di-tertbutyl-4-hydroxyphenyl) propionate, Irganox 1010), 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane (1,1,3-tris(2-methyl-4-hydroxy-5-tert- butylphenyl)butane), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate ), N,N'-hexamethylenebis(3,5-tert-butyl-4-hydroxyhydrocinnamamide) (N,N'-
  • the waterproofing agent is not particularly limited, and for example, silicone-based, epoxy-based, cyanoacrylic acid-based, polyvinyl acrylate-based, ethylene vinyl acetate-based, acrylate-based, polychloroprene-based, polyurethane resin and polyester resin It may include mixtures such as a mixture series of , a mixture series of polyols and polyurethane resins, a mixture series of acrylic polymers and polyurethane resins, polyimide series, and a mixture series of cyanoacrylate and urethane.
  • blowing agent examples include physical blowing agents such as N 2 , CO 2 , Freon, butane, pentane, neopentane, hexane, isohexane, heptane, isoheptane, and methyl chloride.
  • butane may be used in the present invention. have.
  • the step of extruding and foaming may be performed by cooling the resin melt at 220 to 260° C. for easy foaming, and then passing the cooled resin melt through a die.
  • the intrinsic viscosity of the resin melt may be 0.9 dl/g or more, specifically, 1.2 dl/g to 1.5 dl/g.
  • the intrinsic viscosity of the resin By controlling the intrinsic viscosity of the resin to be suitable for foaming, a foam having a high foaming ratio can be effectively produced.
  • the formed foam sheet can be maintained in shape using a calibrator.
  • the foaming temperature may be 180 to 280 °C.
  • the co-polyester resin according to the present invention can easily maintain the viscosity of the resin even when foaming is performed by lowering the foaming temperature to the above range by including isophthalic acid.
  • the foaming temperature may be 225 to 280 ° C, 225 to 275 ° C, or 225 to 265 ° C have.
  • the foaming temperature is 210 to 260° C., 210 to 255° C., or 210 to 250 °C.
  • the foaming temperature is 180 to 240°C, 180 to 230°C, or 180 to 220°C.
  • the step of molding the food packaging container by pressing the male mold may be performed.
  • the foam sheet disposed between the female mold and the male mold may be molded into a cup-shaped food packaging container by thermoforming.
  • the foam seat according to the present invention includes the above-mentioned copolymerized polyester resin, the surface temperature of the mold can be lowered to a certain level compared to the prior art. Accordingly, there is an advantage in that the ratio (H/D) of the side height (H) of the body to the diameter (D) of the bottom part is easy to manufacture a container with a deep depth of 1.1 or more.
  • TPA Terephthalic acid
  • IPA isophthalic acid
  • EG ethylene glycol
  • TPA Terephthalic acid
  • IPA isophthalic acid
  • EG ethylene glycol
  • a polycondensation reaction catalyst was added to the obtained reaction mixture, and a polycondensation reaction was performed while controlling the final temperature and pressure in the reaction tank to be 280 ⁇ 2° C. and 0.1 mmHg, respectively, to prepare a copolymerized polyester resin.
  • the contents of terephthalic acid, isophthalic acid and ethylene glycol were adjusted as described in Table 1 below. Each content was based on the total mole % of the acid component or the diol component.
  • a polyester foam sheet based on 100 parts by weight of the copolymerized polyester resin prepared in Preparation Example 1 in an extruder, 5 parts by weight of pyromellitic dianhydride (PMDA), 0.1 parts by weight of a heat stabilizer (Iganox 1010) and an average 3 parts by weight of calcium carbonate having a particle size of 1.0 to 5.0 ⁇ m was mixed and heated to 280° C. to prepare a resin melt.
  • PMDA pyromellitic dianhydride
  • Iganox 1010 a heat stabilizer
  • calcium carbonate having a particle size of 1.0 to 5.0 ⁇ m
  • butane as a foaming agent was added to the extruder based on 100 parts by weight of the copolymerized polyester resin, and the resin melt was cooled to 250 ⁇ 2°C.
  • the cooled resin melt was extruded and foamed at 270° C. while passing through a die, and a foam sheet having an average thickness of 5.0 mm was prepared. At this time, the density of the manufactured foam sheet was 330 kg/m 3 .
  • Foam sheets were each prepared in the same manner as in Example 1, except that the copolymerized polyester resins prepared in Preparation Examples 2 to 9 were respectively used instead of the copolymerized polyester resin prepared in Preparation Example 1.
  • a foam seat was prepared through the same process as in Example 1, except that the copolymerized polyester resin prepared in Comparative Preparation Example 1 was used instead of the copolymerized polyester resin prepared in Preparation Example 1.
  • Example 1 270 330 1.1 Example 2 265 320 1.3 Example 3 260 310 1.5 Example 4 255 330 1.6 Example 5 250 320 1.8 Example 6 245 310 2.0 Example 7 225 330 2.1 Example 8 220 320 2.3 Example 9 215 310 2.5 Comparative Example 1 280 350 0.5
  • the polyester resin according to Preparation Example contains isophthalic acid, so that the melting point can be lowered to a certain level, and thus the foaming temperature can also be lowered.
  • the foam sheet according to the embodiment improved the adhesive strength to a certain level and was effective in improving the processability by lowering the extrusion foaming temperature. More specifically, as the content of isophthalic acid increased, the melting point was lowered, while the adhesive strength was further increased.
  • the polyester foam seat according to an embodiment of the present invention includes a copolymerized polyester resin having a low melting point, so that the temperature during extrusion and foaming of the polyester resin can be lowered, and thus processability can be improved.
  • the molding temperature of the foam sheet can also be lowered, so that the moldability of the foam sheet can be improved.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

La présente invention concerne une puce de résine de polyester pour moussage, une feuille de mousse de polyester l'utilisant, et son procédé de fabrication, une résine de polyester copolymère ayant un point de fusion de 180 à 255 °C étant utilisée pour abaisser la température de moussage et la température de moulage de feuille, ce qui facilite le contrôle du processus.
PCT/KR2021/004501 2020-04-17 2021-04-09 Puce de résine de polyester pour moussage, feuille de mousse de polyester l'utilisant et son procédé de fabrication WO2021210856A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2020-0046660 2020-04-17
KR1020200046660A KR102372624B1 (ko) 2020-04-17 2020-04-17 발포용 폴리에스테르 수지 칩, 이를 이용한 폴리에스테르 발포시트 및 이의 제조방법
KR1020200046655A KR102372628B1 (ko) 2020-04-17 2020-04-17 발포용 폴리에스테르 수지 칩, 이를 이용한 폴리에스테르 발포시트 및 이의 제조방법
KR1020200046663A KR102372621B1 (ko) 2020-04-17 2020-04-17 발포용 폴리에스테르 수지 칩, 이를 이용한 폴리에스테르 발포시트 및 이의 제조방법
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US20230142458A1 (en) * 2021-11-08 2023-05-11 Nan Ya Plastics Corporation High melt strength polyester resin composition and manufacturing method thereof

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KR20010012355A (ko) * 1997-05-09 2001-02-15 비.씨. 포움 에스.알.엘. 발포된 폴리에스테르, 특히 ｐｅｔ를 제조하는 방법
KR20020002212A (ko) * 2000-06-13 2002-01-09 오오히라 아키라 폴리에스테르 수지 및 성형제품
US20130011657A1 (en) * 2011-07-05 2013-01-10 Nitto Denko Corporation Polyester elastomer foam and foam material
KR20180017874A (ko) * 2016-08-11 2018-02-21 주식회사 휴비스 비결정성 폴리에스테르 발포 조성물 및 이를 포함하는 발포체
KR20190037513A (ko) * 2017-09-29 2019-04-08 주식회사 휴비스 셀 발현 균일도가 우수한 무기입자를 포함하는 발포시트 및 이의 제조방법

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KR20010012355A (ko) * 1997-05-09 2001-02-15 비.씨. 포움 에스.알.엘. 발포된 폴리에스테르, 특히 ｐｅｔ를 제조하는 방법
KR20020002212A (ko) * 2000-06-13 2002-01-09 오오히라 아키라 폴리에스테르 수지 및 성형제품
US20130011657A1 (en) * 2011-07-05 2013-01-10 Nitto Denko Corporation Polyester elastomer foam and foam material
KR20180017874A (ko) * 2016-08-11 2018-02-21 주식회사 휴비스 비결정성 폴리에스테르 발포 조성물 및 이를 포함하는 발포체
KR20190037513A (ko) * 2017-09-29 2019-04-08 주식회사 휴비스 셀 발현 균일도가 우수한 무기입자를 포함하는 발포시트 및 이의 제조방법

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230142458A1 (en) * 2021-11-08 2023-05-11 Nan Ya Plastics Corporation High melt strength polyester resin composition and manufacturing method thereof

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