WO2019124948A1 - Feuille composite ayant une excellente résistance à la chaleur et aptitude à la transformation pour récipient alimentaire et son procédé de fabrication - Google Patents

Feuille composite ayant une excellente résistance à la chaleur et aptitude à la transformation pour récipient alimentaire et son procédé de fabrication Download PDF

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Publication number
WO2019124948A1
WO2019124948A1 PCT/KR2018/016161 KR2018016161W WO2019124948A1 WO 2019124948 A1 WO2019124948 A1 WO 2019124948A1 KR 2018016161 W KR2018016161 W KR 2018016161W WO 2019124948 A1 WO2019124948 A1 WO 2019124948A1
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WO
WIPO (PCT)
Prior art keywords
foam sheet
resin layer
sheet
food container
composite sheet
Prior art date
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PCT/KR2018/016161
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English (en)
Korean (ko)
Inventor
허미
함진수
이광희
김우진
하상훈
최종한
Original Assignee
주식회사 휴비스
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Application filed by 주식회사 휴비스 filed Critical 주식회사 휴비스
Priority to JP2019517000A priority Critical patent/JP2020505247A/ja
Priority to CN201880029022.7A priority patent/CN110612209B/zh
Publication of WO2019124948A1 publication Critical patent/WO2019124948A1/fr

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Classifications

    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas

Definitions

  • the present invention relates to a composite sheet for food containers excellent in heat resistance and processability, a food container formed of the composite sheet, and a method for producing the composite sheet.
  • the foamed product is a product obtained by mixing polystyrene with a foaming gas and extruding it, which has the advantages of maintaining a relatively thick thickness, and maintaining shape, insulation, and cost competitiveness, but has a disadvantage in that harmful substances are detected at high temperatures.
  • a non-foaming container a product made of thermally stable polypropylene in the form of a film is used. However, it has a low dimensional change rate at high temperature and has a merit that no harmful substances are detected, but it is disadvantageous in that it is expensive and deteriorates in heat insulation Patent 10-2012-0058347).
  • the present invention relates to a composite sheet for food containers excellent in heat resistance and processability, a food container formed of the composite sheet, and a method for producing the composite sheet.
  • the composite sheet for food containers according to the present invention comprises:
  • At least one of the foam sheet and the resin layer contains inorganic particles contained in the layer
  • the content of the inorganic particles is in the range of 0.01 to 10 parts by weight based on 100 parts by weight of at least one layer of the foam sheet and the resin layer,
  • the average size of the inorganic particles is 10 ⁇ ⁇ or less.
  • the present invention provides a food container comprising the composite sheet and having a crystallinity of 20% or more.
  • a method for producing a composite sheet for food containers according to the present invention comprises:
  • the acid component comprises at least one of terephthalic acid and terephthalic acid derivatives and at least one of isophthalic acid, isophthalic acid derivative and phthalic anhydride,
  • the at least one layer of the foam sheet and the resin layer includes the inorganic particles contained in the layer.
  • the composite sheet for food containers according to the present invention can simultaneously satisfy the high heat resistance and the excellent processability by controlling the degree of crystallization of the polyester resin foam sheet and the resin layer formed on the foam sheet.
  • the present invention provides a composite sheet for food containers.
  • the composite sheet comprises a foamed sheet of a polyester resin; And a polyester resin layer formed on one or both surfaces of the foam sheet, wherein at least one layer of the foam sheet and the resin layer includes inorganic particles contained in the layer, And 0.01 to 10 parts by weight, based on 100 parts by weight of at least one layer of the resin layer and the resin layer, and the average size of the inorganic particles is 10 m or less.
  • the content of the inorganic particles may be 0.01 part by weight to 8 parts by weight, 0.01 part by weight to 5 parts by weight, 0.01 part by weight to 3 parts by weight based on 100 parts by weight of at least one layer of the foam sheet and the resin layer, 0.01 part by weight to 1 part by weight, 1 part by weight to 10 parts by weight, or 5 parts by weight to 10 parts by weight.
  • the average size of the inorganic particles may be 1 to 10 ⁇ m, 1 to 8 ⁇ m, 1 to 6 ⁇ m, 1 to 4 ⁇ m, or 1 to 2 ⁇ m or less.
  • the inorganic particles may include at least one of Talc, CaCO 3 , TiO 2 , and SiO.
  • both the foam sheet and the resin layer may be a structure containing inorganic particles.
  • the polyester resin layer includes a case where a coating layer is formed or a resin film is laminated.
  • both the foam sheet and the resin layer are formed of a polyethylene terephthalate resin.
  • the foam sheet of the polyester resin comprises a repeating unit derived from an acid component and a diol component, wherein the acid component is at least one member selected from the group consisting of terephthalic acid derivatives, isophthalic acid derivatives and phthalic acid derivatives,
  • the diol component may be selected from the group consisting of ethylene glycol derivatives, 2-methyl-1,3-propanediol, MP, neopentyl glycol, 1,2-propanediol, 2-propanediol, diethylene glycol, and isosobide, and more preferably,
  • the foam sheet of the present invention may be a foam sheet of a polyester resin containing a repeating unit derived from an acid component and a diol component.
  • the acid component may contain a terephthalic acid derivative, and in some cases, it may further include at least one member selected from the group consisting of isophthalic acid derivatives and phthalic acid derivatives.
  • the diol component may contain an ethylene glycol derivative. In some cases, 2-methyl-1,3-propanediol (MP), neopentyl glycol ), 1, 2-propanediol, diethylene glycol, and isosobide may be further included.
  • the repeating units derived from the terephthalic acid derivative and the ethylene glycol derivative may contain 80 mol% to 99 mol% with respect to the total repeating units.
  • the repeating units derived from the terephthalic acid derivative and the ethylene glycol derivative may contain 80 mol% to 99 mol%, 85 mol% to 99 mol%, or 90 mol% to 99 mol%, based on the total repeating units.
  • the repeating unit derived from the terephthalic acid derivative and the ethylene glycol derivative may contain 92 mol% to 99 mol% or 96 mol% to 98 mol% with respect to 100 mol% of the total repeating units.
  • the repeating unit derived from at least one selected from the group consisting of an isophthalic acid derivative and a phthalic acid derivative may contain 1 mol% to 10 mol% based on the total repeating units.
  • the repeating unit derived from an isophthalic acid derivative or a phthalic acid derivative may contain 1 mol% to 8 mol% or 2 mol% to 4 mol% based on the total repeating units.
  • 2-methyl-1,3-propanediol (MP), neopentyl glycol, 1,2-propanediol (1,2 the repeating unit derived from at least one member selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, isopropylene glycol, diethylene glycol, and isosobide may contain 1 mol% to 10 mol% .
  • the repeating unit derived from diethylene glycol or isosobide may contain 1 mol% to 8 mol% or 2 mol% to 4 mol% based on the total repeating unit%.
  • the degree of freedom of the polyester resin copolymer can be increased to lower the melting point of the foam sheet, thereby lowering the crystallization degree of the foam sheet and preventing hardening of the food container And the elongation can be improved, so that the strength from the lamination load or external impact can be improved.
  • the polyester resin as described above has excellent heat resistance and cold resistance, so that the food container can be easily frozen and stored.
  • the polyester resin foam sheet and the polyester resin layer can be formed by the same composition and in the same content, respectively, but different foams.
  • the degree of crystallization of the polyester resin foam sheet and / or the polyester resin layer according to the present invention may be an average of 5% to 40%.
  • the crystallinity may be on average from 5% to 30%, from 5% to 20%, from 15% to 40%, or from 20% to 35%.
  • the thickness of the foam sheet of the present invention may be an average of 0.5 mm to 5 mm. Specifically, the thickness of the foam sheet may be 0.8 mm to 4.0 mm and 1.0 mm to 3.5 mm, and more specifically, the thickness of the foam sheet may be 1.0 mm to 4.0 mm or 1.3 mm to 3.0 mm.
  • the resin layer formed on one side or both sides of the foam sheet is controlled at a level of 1.8 mm or less.
  • the composite sheet according to the present invention can satisfy the following formula (1): " (1) "
  • V o is the volume (mm 3 ) of the composite sheet before exposure for 30 seconds at 200 ° C
  • V 1 is the volume (mm 3 ) of the composite sheet after exposure for 30 seconds at 200 ° C.
  • the rate of dimensional change before and after exposure of the food container sample at 200 ⁇ for 30 seconds was measured.
  • the volume may mean a value calculated by multiplying the length of each foam sheet by the length of each of the width and thickness.
  • the dimensional change ratio according to Equation 1 is 50 to 300%, 50 to 250%, 50 to 200%, 50 to 150%, 50 to 100%, 50 to 80%, 80 to 300% 300%, 150-300%, 200-300%, 250-300%, 80-250%, or 100-200%.
  • the food container according to the present invention has an impact strength of 5 KJ / m < 2 > or more at a temperature of -10 DEG C according to ASTM D 256.
  • the impact strength of the food container may be 5 to 50 KJ / m 2 , 8 to 45 KJ / m 2 , or 10 to 40 KJ / m 2 .
  • the food container according to the present invention has an impact strength in the above range, so that the food container can protect the product from external impact, and can stably store the food, especially at low temperatures.
  • the average cell size of the foam sheet is 10 ⁇ to 690 ⁇ , and the composite sheet satisfies the following formula:
  • V a is the volume (cm 3 ) of the food container before free fall from a height of 30 cm to 500 g sphere into a composite sheet
  • V b is a height of 30 cm from a height of 30 cm.
  • the rate of volume change before and after free fall of a sphere having a height of 30 cm to 500 g was measured on the specimen of the composite sheet thus produced.
  • This is a measure corresponding to the environment in which the food container is impacted.
  • the volume may be a value calculated by multiplying the length of each of the food containers by the length, width, and thickness, respectively.
  • the rate of volume change according to Equation 2 may be 0.01 to 10%, 0.05 to 8%, 0.1 To 5%, or from 1 to 3%.
  • the average cell size of the foam sheet is 10 to 690 ⁇ , 10 to 650 ⁇ , 10 to 600 ⁇ , 10 to 550 ⁇ , 10 to 500 ⁇ , 10 to 450 ⁇ , 10 to 400 ⁇ , 10 to 350 ⁇ , 10 to 150 ⁇ ⁇ , 10 to 100 ⁇ ⁇ , 10 to 50 ⁇ ⁇ , 50 to 690 ⁇ ⁇ , 100 to 690 ⁇ ⁇ , 200 to 690 ⁇ ⁇ , 400 to 690 ⁇ ⁇ , 500 to 600 ⁇ ⁇ , 690 ⁇ ⁇ , 100 to 600 ⁇ ⁇ , 200 to 500 ⁇ ⁇ , or 300 to 400 ⁇ ⁇ .
  • the foam sheet and / or the resin layer applied to the composite sheet according to the present invention is prepared in the form of the inorganic particles added in the resin polymerization step.
  • inorganic particles inorganic substances are first added in the polymerization step of the polyester resin production process, whereby the dispersibility of the inorganic particles can be increased.
  • the foam sheet further comprises inorganic particles contained in the foam sheet, and the content of the inorganic particles is in the range of 0.01 to 5 parts by weight based on 100 parts by weight of the foam sheet.
  • the content of the inorganic particles may be 0.05 to 5 parts by weight, 0.08 to 4 parts by weight, or 0.10 to 3 parts by weight.
  • the inorganic particles may be selected from the group consisting of talc, mica, silica, diatomaceous earth, alumina, titanium oxide, zinc oxide, magnesium oxide, magnesium hydroxide, aluminum hydroxide, calcium hydroxide, potassium carbonate, calcium carbonate, magnesium carbonate, Sodium, and glass beads.
  • the inorganic particles may be at least one selected from the group consisting of titanium oxide (TiO 2 ), talc, silica, and zirconium oxide (ZrO 2 ).
  • the composite sheet may have barrier performance, hydrophilization function, or waterproof function, and may include a surfactant, a heat stabilizer, a waterproofing agent, a cell size expander, an infrared attenuator, a plasticizer, At least one functional additive selected from the group consisting of a pigment, an elastic polymer, an extrusion aid, an antioxidant, a nucleating agent, an antistatic agent and a UV absorber.
  • the resin foam of the present invention may contain a thickener, a nucleating agent, a heat stabilizer and a foaming agent.
  • thickening agent is not particularly limited, for example, pyromellitic dianhydride (PMDA) may be used in the present invention.
  • PMDA pyromellitic dianhydride
  • nucleating agent examples include at least one of talc, mica, silica, diatomaceous earth, alumina, titanium oxide, zinc oxide, magnesium oxide, magnesium hydroxide, aluminum hydroxide, calcium hydroxide, potassium carbonate, calcium carbonate, magnesium carbonate, , Sodium hydrogencarbonate, and glass beads. These nucleating agents can play a role in imparting functionality and reducing the cost of the resin foam.
  • Talc may be used in the present invention.
  • the nucleating agent may be mixed with a resin for extrusion foaming, or may be added in the resin polymerization step as described above.
  • the heat stabilizer may be an organic or inorganic compound.
  • the organic or inorganic phosphorus compound may be, for example, phosphoric acid and organic esters thereof, phosphorous acid and organic esters thereof.
  • the heat stabilizer may be a commercially available material, such as phosphoric acid, alkyl phosphate or aryl phosphate.
  • the heat stabilizer may be triphenyl phosphate, but it is not limited thereto, and it can be used within a usual range without limitation as long as it can improve the thermal stability of the resin foam.
  • foaming agent examples include physical foaming agents such as N 2 , CO 2 , freon, butane, pentane, neopentane, hexane, isohexane, heptane, isoheptane and methyl chloride, azodicarbonamide- (P, P'-oxybis (benzene sulfonyl hydrazide)] based compound, N, N'-dinitroso pentamethylene tetramine ) Based compound, and specifically CO 2 can be used in the present invention.
  • physical foaming agents such as N 2 , CO 2 , freon, butane, pentane, neopentane, hexane, isohexane, heptane, isoheptane and methyl chloride, azodicarbonamide- (P, P'-oxybis (benzene sulfonyl hydrazide)] based compound, N, N'-din
  • the present invention also provides a food container comprising the above-described composite sheet and having a degree of crystallinity of 20% or more.
  • the food container is a structure including a containing portion formed of the composite sheet.
  • the food container may satisfy the following equation (3).
  • T 1 is the temperature of the outer surface of the food container measured at 1 ° C after containing water at 100 ° C in a food container at 20 ° C and 1 atm
  • T 2 is the temperature measured at 20 ° C and 1 atm
  • It is the water temperature inside the food container measured at 1 minute after containing 100 ⁇ water.
  • the food container according to the present invention is characterized in that the difference between the outside surface temperature of the food container and the inside water temperature measured when the food container is filled with water at 100 DEG C for 1 minute is 10 DEG C or more Since the heat insulating property is excellent, the outer surface temperature is low even when hot water is contained, so that the movement of the food container can be facilitated. This may be because heat is blocked by the air layer due to foaming in the composite sheet.
  • a food container according to the present invention comprises:
  • Foam sheet And a resin layer formed on one side or both sides of the foam sheet, the concave shaped food compartment having an upper opening; And a lid portion including a polyester or polypropylene resin layer and a resin layer formed on one or both sides of the polyester or polypropylene resin layer and having a shape corresponding to an upper opening portion of the food containing portion,
  • the upper surface of the rim of the food compartment and the lower surface of the lid are each coated with a resin of the same kind or a laminated structure of the film layers.
  • the food container according to the present invention may have an oxygen transmission rate of 50 cc / m 2 / 24h or less under a condition of a temperature of 23 ° C and a relative humidity of 50%.
  • the oxygen permeability of the food container may be 0.1 to 50 cc / m 2 / 24h, 0.1 to 30 cc / m 2 / 24h or 0.1 to 5 cc / m 2 / 24h.
  • the food storage part comprises a foamed sheet of a polyester resin; An ethylene vinyl alcohol coating layer; And a polyethylene resin layer, wherein the lid portion comprises a polyester or nylon resin layer; An ethylene vinyl alcohol coating layer; And a polyethylene resin layer are laminated in this order, and the polyethylene resin layer of the food containing portion and the polyethylene resin layer of the lid portion are bonded to each other so as to face each other.
  • the lid part is joined on the food compartment in the state where the object to be stored is housed in the food compartment, and the internal space formed by the bonding of the food compartment and the lid part may be filled with nitrogen gas have.
  • the foam sheet according to the present invention is passed through a heater so that the surface temperature of the sheet becomes 80 to 200 DEG C, and the temperature of the mold for forming the container shape is set to 140 to 200 DEG C Lt; / RTI >
  • the present invention provides a method for producing the above-described composite sheet for food containers.
  • the production process according to the present invention comprises the steps of extruding and foaming a polyester resin prepared by polymerizing an acid component and a diol component to produce a foamed sheet; Forming a polyester resin layer on one side or both sides of the foam sheet; And heating and pressing the foam sheet on which the resin layer is formed to form a concave shape having an upper opening.
  • the acid component comprises at least one of terephthalic acid and terephthalic acid derivatives and at least one of isophthalic acid, isophthalic acid derivative and phthalic anhydride,
  • the at least one layer of the foam sheet and the resin layer includes the inorganic particles contained in the layer.
  • both the foam sheet and the resin layer may have a structure containing inorganic particles.
  • the acid component may necessarily contain a terephthalic acid derivative, and in some cases, a terephthalic acid derivative Or more species.
  • the diol component may contain an ethylene glycol derivative.
  • MP 2-methyl-1,3-propanediol
  • neopentyl glycol 1, 2-propanediol, diethylene glycol, and isosobide may be further included.
  • the produced polyester resin may contain 80 mol% to 99 mol% of repeating units derived from a terephthalic acid derivative and an ethylene glycol derivative, based on the total repeating units.
  • the repeating units derived from the terephthalic acid derivative and the ethylene glycol derivative may contain 80 mol% to 99 mol%, 85 mol% to 99 mol%, or 90 mol% to 99 mol%, based on the total repeating units.
  • the repeating units derived from the terephthalic acid derivative and the ethylene glycol derivative may contain 92 mol% to 99 mol%, or 96 mol% to 98 mol%, based on 100 mol% of the total repeating units.
  • the repeating unit derived from at least one selected from the group consisting of an isophthalic acid derivative and a phthalic acid derivative may contain 1 mol% to 10 mol% based on the total repeating units.
  • the repeating unit derived from an isophthalic acid derivative or a phthalic acid derivative may contain 1 mol% to 8 mol% or 2 mol% to 4 mol% based on the total repeating units.
  • 2-methyl-1,3-propanediol (MP), neopentyl glycol, 1,2-propanediol (1,2 the repeating unit derived from at least one member selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, isopropylene glycol, diethylene glycol, and isosobide may contain 1 mol% to 10 mol% .
  • the repeating unit derived from diethylene glycol or isosobide may contain 1 mol% to 8 mol% or 2 mol% to 4 mol% based on the total repeating units.
  • the degree of freedom of the resin can be increased to lower the melting point of the foam sheet. Accordingly, the foam sheet has a low degree of crystallization, and the foam sheet can be prevented from hardening at the time of thermoforming have.
  • the step of producing a polyester resin may be carried out by mixing an isophthalic acid derivative or a phthalic acid derivative in an acid component at a ratio of 1 mol% to 10 mol% with respect to the total of the acid component and the diol component.
  • an isophthalic acid derivative or a phthalic acid derivative in an acid component may be mixed in an amount of 1 mol% to 8 mol% or 2 mol% to 4 mol% based on the total amount of the acid component and the diol component.
  • the step of preparing the polyester resin is preferably carried out in the diol component using 2-methyl-1,3-propanediol (MP), neopentyl glycol, 1,2-propanediol 1,2-propanediol, diethylene glycol or isosobide can be mixed in an amount of 1 mol% to 10 mol% based on the total amount of the acid component and the diol component.
  • MP 2-methyl-1,3-propanediol
  • neopentyl glycol, 1,2-propanediol 1,2-propanediol, diethylene glycol or isosobide can be mixed in an amount of 1 mol% to 10 mol% based on the total amount of the acid component and the diol component.
  • the diol component may include 2-methyl-1,3-propanediol, MP, neopentyl glycol, 1,2- propanediol, diethylene glycol or isosobide may be mixed in an amount of 1 mol% to 8 mol% or 2 mol% to 4 mol% based on the total amount of the acid component and the diol component.
  • the step of producing the foam sheet may include a foaming process of foaming the polyester resin to produce a foam.
  • the foaming process can be performed using various types of extruders.
  • the foaming process can be largely carried out through bead foaming or extrusion foaming, and extrusion foaming is preferred.
  • the extrusion foaming can simplify the process steps by continuously extruding and foaming the resin melt, and can be mass-produced. It prevents cracks and granular fracture between the beads at the time of bead foaming, And compressive strength can be realized.
  • the foam sheet in the step of producing the foam sheet, may be formed to a thickness of 0.5 mm to 5 mm. Specifically, the foam sheet may be formed to a thickness of 0.8 mm to 4.0 mm and 1.0 mm to 3.5 mm, and more specifically, the foam sheet may be formed to have a thickness of 1.0 mm to 4.0 mm or 1.3 mm to 3.0 mm .
  • the step of producing the foam sheet according to the present invention may be carried out in various types of additives.
  • the additive may be injected into the fluid connection line, or may be injected during the foaming process, if necessary.
  • the additive may include a barrier property, a hydrophilization function or a waterproof function, and may be selected from the group consisting of a thickener, a surfactant, a hydrophilizing agent, a heat stabilizer, a waterproofing agent, a cell size expanding agent, an infrared attenuator, a plasticizer, At least one functional additive selected from the group consisting of a pigment, an elastic polymer, an extrusion aid, an antioxidant, a nucleating agent, an antistatic agent, and a UV absorber.
  • the method for manufacturing a foam of the present invention may contain at least one of a thickener, a nucleating agent, a heat stabilizer and a foaming agent, and may further include at least one of the above-mentioned functional additives.
  • the step of preparing the foam sheet of the present invention can be carried out by using a thickener, a hydrophilizing agent, a heat stabilizer, a waterproofing agent, a cell size enlarging agent, an infrared attenuator, a plasticizer, a fire retardant chemical, a pigment, an elastic polymer,
  • a thickener a hydrophilizing agent, a heat stabilizer, a waterproofing agent, a cell size enlarging agent, an infrared attenuator, a plasticizer, a fire retardant chemical, a pigment, an elastic polymer
  • One or more additives selected from the group consisting of a nucleating agent, an anti-static agent, and a UV absorber may be introduced into the fluid connection line.
  • the additives which have not been introduced into the fluid connection line can be put in the extrusion process.
  • thickening agent is not particularly limited, for example, pyromellitic dianhydride (PMDA) may be used in the present invention.
  • PMDA pyromellitic dianhydride
  • nucleating agent examples include at least one of talc, mica, silica, diatomaceous earth, alumina, titanium oxide, zinc oxide, magnesium oxide, magnesium hydroxide, aluminum hydroxide, calcium hydroxide, potassium carbonate, calcium carbonate, magnesium carbonate, , Sodium hydrogencarbonate, and glass beads. These nucleating agents can play a role in imparting functionality and reducing the cost of the resin foam. Specifically, Talc may be used in the present invention.
  • inorganic particles inorganic substances are first added in the polymerization step of the polyester resin production process, whereby the dispersibility of the inorganic particles can be increased.
  • the content of the inorganic particles is in the range of 0.01 to 5 parts by weight based on 100 parts by weight of the foam sheet. Specifically, the content of the inorganic particles may be 0.05 to 5 parts by weight, 0.08 to 4 parts by weight, or 0.10 to 3 parts by weight.
  • the heat stabilizer may be an organic or inorganic compound.
  • the organic or inorganic phosphorus compound may be, for example, phosphoric acid and organic esters thereof, phosphorous acid and organic esters thereof.
  • the heat stabilizer may be a commercially available material, such as phosphoric acid, alkyl phosphate or aryl phosphate.
  • the heat stabilizer may be triphenyl phosphate, but it is not limited thereto, and it can be used within a usual range without limitation as long as it can improve the thermal stability of the resin foam.
  • foaming agent examples include physical foaming agents such as N 2 , CO 2 , freon, butane, pentane, neopentane, hexane, isohexane, heptane, isoheptane and methyl chloride, azodicarbonamide- (P, P'-oxybis (benzene sulfonyl hydrazide)] based compound, N, N'-dinitroso pentamethylene tetramine ) Based compound, and specifically CO 2 can be used in the present invention.
  • physical foaming agents such as N 2 , CO 2 , freon, butane, pentane, neopentane, hexane, isohexane, heptane, isoheptane and methyl chloride, azodicarbonamide- (P, P'-oxybis (benzene sulfonyl hydrazide)] based compound, N, N'-din
  • the waterproofing agent is not particularly limited and includes, for example, silicone, epoxy, cyanoacrylate, polyvinyl acrylate, ethylene vinyl acetate, acrylate, polychloroprene, polyurethane and polyester resins , A mixture of polyol and polyurethane resin, a mixture of acrylic polymer and polyurethane resin, a polyimide, and a mixture of cyanoacrylate and urethane.
  • the composite sheet produced in the present invention is processed to produce a food container. Specifically, it is possible to mold the foam sheet and the resin layer at a mold temperature of 80 to 200 ⁇ ⁇ after applying heat at 140 to 190 ⁇ ⁇ .
  • the composite sheet according to the present invention is also applicable to deep drawing processing of 7 cm or more.
  • 0.5 part by weight of pyromellitic dianhydride, 0.5 part by weight of talc, and 0.1 part by weight of Irganox (IRG 1010) were mixed with 100 parts by weight of the above polyester resin and heated to 280 ° C to prepare a resin melt. Then, 3 parts by weight of butane as a foaming agent was added to the first extruder based on 100 parts by weight of PET resin, and extrusion foaming was carried out to form a foam layer having a thickness of 2 mm to prepare a polyester resin foam sheet.
  • the polyethylene terephthalate resin melt was extrusion-coated on the foam sheet by a T-die to form a resin coating layer.
  • the foam sheet was heated and pressed at a temperature ranging from 300 ° C to 400 ° C at a pressing speed of 4 mm / min to produce a composite sheet.
  • polyester resin 100 parts by weight, and mixing pyromellitic Meridian hydride 0.5 part by weight, 3 parts by weight of calcium carbonate having a mean particle size of 2 ⁇ m, TiO 2 2 parts by weight of Irganox (IRG 1010) 0.1 parts by weight, 280 °C To prepare a resin melt. Then, 3 parts by weight of butane as a blowing agent was added to the first extruder based on 100 parts by weight of PET resin, and extrusion foaming was carried out. The foamed layer had a density of 350 kg / m 3 and a thickness of 1.5 mm.
  • a composite sheet was prepared in the same manner as in Example 1, except that the resin coating layer contained no inorganic particles on the foam sheet.
  • a composite sheet was prepared in the same manner as in Example 1 except that the crystallization degree of the foam sheet was controlled to 65%.
  • Example 1 Using the composite sheet produced in Example 1 and Comparative Examples 1 and 2, the high temperature properties were measured. The measurement conditions are described below, and the results are shown in Table 1 below.
  • the high temperature characteristics were obtained by storing each sample in an oven at 150 ° C for 10 minutes.
  • the volume of the sample before being placed in the oven and the volume of the sample after 3 hours in the oven were respectively measured and the change was calculated.
  • Example 1 the volume change rate at high temperature in Example 1 is significantly reduced as compared with Comparative Examples 1 and 2. Therefore, it can be seen that the composite sheet according to the present invention is excellent in high temperature stability.
  • the temperature difference was measured by measuring the surface temperature of the outside of the container and the temperature of the inside water with an infrared thermometer after 5 minutes of placing the water at 100 ° C. into the container.
  • the compressive strength was measured by using a tensile strength tester at a constant speed (100 mm / min) under maximum load.
  • Example 1 the volume change rate at high temperature in Example 1 is significantly reduced as compared with Comparative Examples 1 and 2. Therefore, it can be seen that the composite sheet according to the present invention is excellent in high temperature stability.
  • Example 1 Using the composite sheet produced in Example 1 and Comparative Examples 1 and 2, the processing characteristics were measured. Specifically, each sample was cut into a size of 20 cm x 20 cm. A machining depth of 7 cm was performed for each aliquot. After machining, the appearance was confirmed and the defect was confirmed.
  • the composite sheet for food containers according to the present invention can simultaneously satisfy the high heat resistance and the excellent processability by controlling the degree of crystallization of the polyester resin foam sheet and the resin layer formed on the foam sheet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Wrappers (AREA)
  • Packages (AREA)

Abstract

La présente invention concerne une feuille composite pour récipient alimentaire, la feuille composite comprenant une feuille de mousse de résine de polyester et une couche de résine de polyester, et son procédé de fabrication. Un récipient alimentaire formé de la feuille composite peut satisfaire à la fois une résistance élevée à la chaleur et une excellente aptitude au traitement par le contrôle du degré de cristallisation.
PCT/KR2018/016161 2017-12-18 2018-12-18 Feuille composite ayant une excellente résistance à la chaleur et aptitude à la transformation pour récipient alimentaire et son procédé de fabrication WO2019124948A1 (fr)

Priority Applications (2)

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JP2019517000A JP2020505247A (ja) 2017-12-18 2018-12-18 耐熱性および加工性が優秀な食品容器用複合シートおよびその製造方法
CN201880029022.7A CN110612209B (zh) 2017-12-18 2018-12-18 耐热性及加工性优异的食品容器用复合片材及其制备方法

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KR10-2017-0174316 2017-12-18
KR20170174316 2017-12-18

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KR102175971B1 (ko) * 2019-06-28 2020-11-10 주식회사 휴비스 부위별 셀의 크기가 상이한 발포 성형체, 상기 발포 성형체를 포함하는 포장용기 및 상기 발포 성형체의 제조방법
KR102285935B1 (ko) * 2019-11-25 2021-08-05 주식회사 에스폴리텍 열가소성 수지 발포 시트
KR102443537B1 (ko) * 2020-04-21 2022-09-16 주식회사 휴비스 카르복실 말단기의 당량이 제어된 폴리에스테르 발포시트

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CN110612209A (zh) 2019-12-24
KR20190073306A (ko) 2019-06-26
KR102319817B1 (ko) 2021-11-02
JP2021062622A (ja) 2021-04-22
JP2020505247A (ja) 2020-02-20

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