WO2022085981A1 - 폴리에스테르 필름, 이를 포함하는 열수축성 라벨 및 포장재 - Google Patents
폴리에스테르 필름, 이를 포함하는 열수축성 라벨 및 포장재 Download PDFInfo
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- WO2022085981A1 WO2022085981A1 PCT/KR2021/013450 KR2021013450W WO2022085981A1 WO 2022085981 A1 WO2022085981 A1 WO 2022085981A1 KR 2021013450 W KR2021013450 W KR 2021013450W WO 2022085981 A1 WO2022085981 A1 WO 2022085981A1
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- polyester film
- shrinkage
- units
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- 229920006267 polyester film Polymers 0.000 title claims abstract description 115
- 239000005022 packaging material Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 35
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 35
- 150000002009 diols Chemical class 0.000 claims description 35
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 27
- 229920001225 polyester resin Polymers 0.000 claims description 23
- 239000004645 polyester resin Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 14
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 13
- -1 aromatic dicarboxylic acids Chemical class 0.000 claims description 9
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 claims description 8
- 230000007547 defect Effects 0.000 abstract description 7
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 10
- 230000008602 contraction Effects 0.000 description 9
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 7
- 238000009998 heat setting Methods 0.000 description 6
- DCTMXCOHGKSXIZ-UHFFFAOYSA-N (R)-1,3-Octanediol Chemical compound CCCCCC(O)CCO DCTMXCOHGKSXIZ-UHFFFAOYSA-N 0.000 description 4
- 229920006257 Heat-shrinkable film Polymers 0.000 description 4
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005809 transesterification reaction Methods 0.000 description 3
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 2
- 229940031723 1,2-octanediol Drugs 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 229940043375 1,5-pentanediol Drugs 0.000 description 2
- YUQDBHFUUCAXOX-UHFFFAOYSA-N 2,2-diethylpentane-1,5-diol Chemical compound CCC(CC)(CO)CCCO YUQDBHFUUCAXOX-UHFFFAOYSA-N 0.000 description 2
- OJRJDENLRJHEJO-UHFFFAOYSA-N 2,4-diethylpentane-1,5-diol Chemical compound CCC(CO)CC(CC)CO OJRJDENLRJHEJO-UHFFFAOYSA-N 0.000 description 2
- DSKYSDCYIODJPC-UHFFFAOYSA-N 2-butyl-2-ethylpropane-1,3-diol Chemical compound CCCCC(CC)(CO)CO DSKYSDCYIODJPC-UHFFFAOYSA-N 0.000 description 2
- SXFJDZNJHVPHPH-UHFFFAOYSA-N 3-methylpentane-1,5-diol Chemical compound OCCC(C)CCO SXFJDZNJHVPHPH-UHFFFAOYSA-N 0.000 description 2
- LNFDWQCEHXSMLT-UHFFFAOYSA-N 5-methylhexane-1,5-diol Chemical compound CC(C)(O)CCCCO LNFDWQCEHXSMLT-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 235000019437 butane-1,3-diol Nutrition 0.000 description 2
- OWBTYPJTUOEWEK-UHFFFAOYSA-N butane-2,3-diol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- AEIJTFQOBWATKX-UHFFFAOYSA-N octane-1,2-diol Chemical compound CCCCCCC(O)CO AEIJTFQOBWATKX-UHFFFAOYSA-N 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- ALVZNPYWJMLXKV-UHFFFAOYSA-N 1,9-Nonanediol Chemical compound OCCCCCCCCCO ALVZNPYWJMLXKV-UHFFFAOYSA-N 0.000 description 1
- RYRZSXJVEILFRR-UHFFFAOYSA-N 2,3-dimethylterephthalic acid Chemical compound CC1=C(C)C(C(O)=O)=CC=C1C(O)=O RYRZSXJVEILFRR-UHFFFAOYSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- YEPVFTUTZVSSSD-UHFFFAOYSA-N C(C)C(CO)C(CC(C)O)C Chemical compound C(C)C(CO)C(CC(C)O)C YEPVFTUTZVSSSD-UHFFFAOYSA-N 0.000 description 1
- QOTJNKPJPPUQSF-UHFFFAOYSA-N C(C)C(CO)C(CC(C)O)CC Chemical compound C(C)C(CO)C(CC(C)O)CC QOTJNKPJPPUQSF-UHFFFAOYSA-N 0.000 description 1
- LVIKCGPOAFQSDX-UHFFFAOYSA-N C(C)C(CO)C(CC(CC)O)C Chemical compound C(C)C(CO)C(CC(CC)O)C LVIKCGPOAFQSDX-UHFFFAOYSA-N 0.000 description 1
- QYXOVFCMFKMXNG-UHFFFAOYSA-N C(C)C(CO)C(CCC(C)O)CC Chemical compound C(C)C(CO)C(CCC(C)O)CC QYXOVFCMFKMXNG-UHFFFAOYSA-N 0.000 description 1
- IFCRNSRUHSGFEM-UHFFFAOYSA-N CO.[P] Chemical compound CO.[P] IFCRNSRUHSGFEM-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- FOTKYAAJKYLFFN-UHFFFAOYSA-N decane-1,10-diol Chemical compound OCCCCCCCCCCO FOTKYAAJKYLFFN-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- SXCBDZAEHILGLM-UHFFFAOYSA-N heptane-1,7-diol Chemical compound OCCCCCCCO SXCBDZAEHILGLM-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
-
- 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
- C08G63/199—Acids or hydroxy compounds containing cycloaliphatic rings
-
- 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
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Definitions
- the embodiment relates to a polyester film, a heat-shrinkable label and packaging material comprising the same. Specifically, the embodiment relates to a polyester film having uniform shrinkage, and heat-shrinkable labels and packaging materials applicable to various containers including the same.
- Heat-shrinkable labels and packaging materials are attracting attention due to cases in which beverage or food containers are manufactured in various forms and full wrapping is applied to induce consumers' attention.
- Heat-shrinkable labels and packaging materials use the characteristic that the polymer film shrinks to the shape before stretching again at a specific temperature or higher after stretching orientation.
- a desired design is printed and cut on a heat-shrinkable film, rolled up and both ends are adhered with an adhesive solvent, then loosely covered with a container and shrunk by applying heat.
- the heat-shrinkable film applied to this requires not only basic properties such as heat resistance, chemical resistance, weather resistance, printability, etc., but also container sealing property, heat shrink uniformity, running characteristics in the longitudinal direction, and crack resistance.
- a heat-shrinkable film polyvinyl chloride film, polystyrene film, polypropylene film, etc. have been used in the past. .
- Korean Patent Application Laid-Open No. 2002-0062838 discloses that 5 wt% or more of polyester elastomer is blended in a heat-shrinkable polyester film to suppress the occurrence of wrinkles, shrinkage stains, distortions, etc. due to heat shrinkage during full packaging of plastic bottles. is starting
- Patent Document 1 Korean Patent Publication No. 2002-0062838
- the embodiment is to provide a polyester film capable of reducing the occurrence of defects by improving the uniformity of shrinkage, and a heat-shrinkable label and packaging material including the same.
- a diol comprising ethylene glycol and one or more comonomers; and a copolymerized polyester resin in which an aromatic dicarboxylic acid is polymerized, and when T ab is defined as shown in the following formula, T 75-70 is 1%/°C to 3%/°C with respect to the main shrinkage direction, and T 90-80 A polyester film of this 2%/°C to 3%/°C is provided.
- a heat-shrinkable label or packaging material comprising the polyester film is provided.
- polyester film according to the embodiment is uniformly shrunk in the heat shrink process by controlling the shrinkage rate gradient for each temperature section, it can be in close contact with the container without appearance defects such as distortion or curling after shrinking.
- the shrinkage characteristics of such a polyester film can be implemented in a desired range by controlling the copolymerization component and content of the co-polyester resin constituting it and controlling the process conditions in the manufacturing process.
- the polyester film according to the embodiment can be usefully applied as a heat-shrinkable label or packaging material to containers of various products including beverages and food.
- FIG. 1A and 1B respectively show before and after heat shrinkage of a heat-shrinkable label applied to a container.
- Figure 2 shows a method for measuring the shrinkage of the polyester film in Experimental Example 1.
- Figure 4 shows a method for evaluating the shrinkage stress of the polyester film in Experimental Example 3.
- 6A shows an example of a polyester film that is shrunk after being partitioned into a plurality of lattice units of the same size and subjected to heat treatment.
- FIG. 6B shows that a virtual lattice unit is applied to the shrunken lattice unit shown in FIG. 6A above.
- 6C and 6D show that the size of the grid unit of FIG. 6B is doubled and quadrupled, respectively, and the virtual grid unit is applied after division and contraction.
- 11 sleeve label (before shrinkage), 11a: sleeve label after shrinkage,
- 111b non-uniformly contracted lattice unit
- 111c lattice unit with a large distortion shape
- L1 the side of the contracted grid unit
- d the separation distance between L0 and L1
- L the length of the film
- W the width of the film
- MD the longitudinal direction of the film
- one component is formed above or below another component means that one component is directly above or below another component or indirectly through another component. including all that are formed by
- FIG. 1A and 1B respectively show before and after heat shrinkage of a heat-shrinkable label applied to a container.
- the desired design is printed on a heat-shrinkable film, rolled up, and both ends are adhered with an adhesive solvent to prepare a label 11 in the form of a sleeve, and then loosely cover the container 20 and heat do.
- FIG. 1b it is possible to obtain a product in which the label 11a contracted by heat is closely adhered along the curvature of the container 20 .
- a general polyester film has a problem in that the film has a non-uniform appearance or wrinkles occur due to the rapid contraction of the film at a specific temperature when the temperature is raised in this heat shrink process.
- the embodiment provides a polyester film capable of reducing the occurrence of defects by improving the uniformity of shrinkage.
- T ab is defined as shown in the following formula
- T 75-70 is 1%/°C to 3%/°C in the main shrinkage direction
- T 90-80 is 2%/°C to 3%/°C.
- the shrinkage rate gradient for each temperature section is adjusted to uniformly shrink in the heat shrink process, it can be in close contact with the container without appearance defects such as distortion or curling after shrinkage.
- T 75-70 is 1%/°C to 2.5%/°C, 1%/°C to 2%/°C, 1.5%/°C to 3%/°C, 1.5%/°C to 2.5%/°C, 2% /°C to 3%/°C, or 2.5%/°C to 3%/°C.
- T 80-75 may be 1%/°C to 5%/°C, 1%/°C to 4%/°C, 2%/°C to 5%/°C, or 2%/°C to 4%/°C .
- T 90-80 may be 2%/°C to 2.5%/°C, or 2.5%/°C to 3%/°C.
- T 100-90 may be 0%/°C to 2%/°C, or 0.2%/°C to 1.5%/°C.
- the shrinkage rate in the main shrinkage direction for each temperature may be adjusted within a specific range.
- the polyester film when the polyester film is heat-treated at a temperature of X °C for 10 seconds, when the shrinkage in the main shrinkage direction is defined as T X , the ranges of T 70 , T 75 , T 80 , T 90 and T 100 can be adjusted. there is.
- the heat treatment for obtaining the T X may be, specifically, immersing the polyester film in warm water at X° C. for 10 seconds.
- T 70 of the polyester film may be 0% to 30%, 0% to 20%, or 5% to 15%.
- T 75 of the polyester film may be 0% to 40%, 5% to 40%, or 10% to 30%.
- T 80 of the polyester film may be 10% to 60%, 20% to 50%, or 25% to 45%.
- T 90 of the polyester film may be 30% to 90%, 40% to 80%, or 50% to 70%.
- T 100 of the polyester film may be 40% to 90%, 50% to 80%, or 60% to 75%.
- T X when the polyester film is heat treated at a temperature of X° C. for 10 seconds, when the shrinkage in the main shrinkage direction is defined as T X , T 70 is 0% to 20%, and T 75 is 5% to 40% and T 80 may be 20% to 50%, and T 90 may be 40% to 80%.
- the shrinkage rate in a direction perpendicular to the main shrinkage direction may be adjusted within a specific range.
- SR% when the polyester film is fixed in the main shrinkage direction and heat treated at 90° C. for 10 seconds, SR% according to the following formula may be 10% or less.
- x1 is the dimension before heat treatment in the direction perpendicular to the main shrinkage direction (mm)
- x2 is the dimension after heat treatment in the direction perpendicular to the main shrinkage direction (mm)
- y is the dimension in the main shrinkage direction ( mm).
- x2 is the smallest dimension after heat treatment in a direction perpendicular to the main shrinkage direction.
- the heat treatment for obtaining the SR% may be, for example, fixing both ends of the polyester film in the main shrinkage direction and immersing it in hot water at 90° C. for 10 seconds.
- the SR% may be 7% or less, more specifically 0% to 10%, or 0% to 7%.
- the shrinkage stress in the main shrinkage direction may be adjusted within a specific range.
- the maximum stress in the main shrinkage direction may be 2 N to 6 N, and specifically 3 N to 4.5 N, or 3.5 N to 4.5 N.
- the residual stress in the main shrinkage direction may be 1 N to 5 N, specifically 2 N to 3.5 N, or 2.5 N to 3.5 N.
- the maximum stress in the main shrinkage direction may be 3 N to 4.5 N and the residual stress may be 2 N to 3.5 N.
- the heat treatment for obtaining the shrinkage stress may be, specifically, fixing the polyester film in the main shrinkage direction and immersion in hot water at 90° C. for 1 minute.
- the stress at the highest point may be the maximum stress
- the stress at the end point of the shrinkage time may be the residual stress.
- the polyester film according to the embodiment may have a uniform appearance without distortion after shrinkage.
- the number of uniformly shrunk lattice units is 90% or more of the total number of lattice units, specifically may be greater than 95%.
- the size of the lattice unit may be equal to 600 to 800 pieces of the polyester film, or 700 to 750 pieces.
- 6A shows an example of a polyester film that is shrunk after being partitioned into a plurality of lattice units of the same size and subjected to heat treatment.
- the lattice units in the shrunk film have a uniformly shrunk lattice unit 111a while maintaining a substantially rectangular shape.
- some lattice units in the shrunk film are distorted during the shrinkage process and thus have a non-uniformly contracted lattice unit 111b shape.
- FIG. 6B shows that a virtual lattice unit is applied to the shrunken lattice unit shown in FIG. 6A above.
- the shrunken lattice unit is indicated by a thin solid line
- the virtual lattice unit is indicated by a thick solid line.
- the uniformly contracted lattice unit coincides with all four sides of the virtual lattice unit or has almost no difference
- the non-uniformly contracted lattice unit 111b has a side L1 and a corresponding virtual lattice unit. It has the maximum separation distance d between the sides L0 of the grid unit. For example, when the maximum separation distance d exceeds 10% of the size of the side L0 of the virtual grid unit, it may be determined as non-uniform contraction. Conversely, when the maximum separation distance d is within 10%, more specifically, within 5% of the size of the side L0 of the virtual grid unit, it can be determined as a uniform contraction.
- the number of uniformly shrunken lattice units measured in this way is 90% or more, specifically, 95% or more of the total number of lattice units, which is advantageous in improving the appearance of the heat-shrinkable label.
- the first shrinkage uniformity calculated in (1) may be 90% or more.
- First shrinkage uniformity number of uniformly shrunk grid units / number of total grid units (initial size 5 mm) x 100 ... (1)
- the number of uniformly contracted lattice units is determined by defining the virtual quadrangular lattice unit connecting the corners of the shrunk lattice unit.
- the maximum separation distance between the four sides of the contracted grid unit means the number of grid units within 10% of the size of each side of the virtual rectangular grid unit.
- non-uniform shrinkage that is not measured in the above method may occur depending on the distortion shape of the contracted film.
- the lattice unit 111c having a larger distortion than the lattice unit it may not be spaced apart from the side of the virtual lattice unit, and as a result, it is measured in a non-uniformly contracted lattice unit. it may not be
- the lattice unit 111c having a large distortion shape may be measured when the size of the lattice unit is increased.
- FIGS. 6C and 6D show that the size of the grid unit of FIG. 6B is doubled and quadrupled, respectively, and the virtual grid unit is applied after division and contraction.
- the existing grid units (before the size increase) are indicated by dotted lines
- the grid units with increased sizes are indicated by thin solid lines
- the virtual grid units are indicated by thick solid lines.
- the second shrinkage uniformity calculated in Equation (2) may be 90% or more.
- Second shrinkage uniformity (%) number of uniformly shrunk grid units / number of total grid units (initial size of 1 cm) x 100 ... (2)
- the number of uniformly contracted lattice units is determined by defining the virtual quadrangular lattice unit connecting the corners of the shrunken lattice unit.
- the maximum separation distance between the four sides of the contracted grid unit means the number of grid units within 10% of the size of each side of the virtual rectangular grid unit.
- the third shrinkage uniformity calculated in 3) may be 90% or more.
- Third shrinkage uniformity (%) number of uniformly shrunk grid units / number of total grid units (initial size 2 cm) x 100 ... (3)
- the number of uniformly contracted lattice units is the number of four sides of the virtual quadrangular lattice unit corresponding to each other when defining an imaginary quadrangular lattice unit connecting the corners of the shrunk lattice unit.
- the maximum separation distance between the four sides of the shrunken grid unit means the number of grid units within 10% of the size of each side of the virtual rectangular grid unit.
- the fourth shrinkage uniformity calculated in may be 90% or more.
- Fourth shrinkage uniformity (%) number of uniformly shrunk grid units / number of total grid units (initial size 4 cm) x 100 ... (4)
- the number of uniformly contracted lattice units is the number of four sides of the virtual quadrangular lattice unit corresponding to each other when defining an imaginary rectangular lattice unit connecting the corners of the shrunk lattice unit.
- the maximum separation distance between the four sides of the shrunken grid unit means the number of grid units within 10% of the size of each side of the virtual rectangular grid unit.
- the transverse direction of the polyester film may be the main shrinkage direction of the polyester film.
- the shrinkage uniformity can be measured by cutting the polyester film to a size of 180 mm ⁇ 100 mm (width ⁇ length), dividing it into individual grid units, and then heat-treating it at 75° C. for 10 seconds to shrink it.
- the heat treatment for measuring the shrinkage uniformity may be performed by rolling the polyester film into a shape of a sleeve attached to both ends in the main shrinkage direction and then immersing the polyester film in hot water having a diameter of 75° C. for 10 seconds. At this time, it can be prepared in the form of a sleeve by adding adhesive portions having a width of 2 mm to 4 mm, respectively, to both ends of the polyester film, and laminating the adhesive portions at both ends. To this end, before the heat treatment, the horizontal length of the polyester film may be cut into a length in consideration of the length of the adhesive part.
- the horizontal length of the polyester film may be cut to 186 mm, and 3 mm of each of both ends may be used as an adhesive portion.
- the immersion may be performed after covering the sleeve-shaped film on a cylindrical container having a diameter of 85% to 95% of its diameter.
- the diameter of the cylindrical container may be 40 mm to 60 mm, more specifically 45 mm to 55 mm.
- the length (height) of the cylindrical container may be 100% to 130% of the initial length (ie, sleeve-shaped length) of the polyester film in the longitudinal direction, and specifically may be 110% to 120%.
- the length of the cylindrical container may be 100 mm to 130 mm, specifically 110 mm to 120 mm.
- the material of the cylindrical container may be a metal such as aluminum.
- the polyester film may have a thickness of 10 ⁇ m to 100 ⁇ m.
- the thickness of the polyester film may be 20 ⁇ m to 80 ⁇ m, or 30 ⁇ m to 70 ⁇ m. When it is within the above range, it may be more advantageous in terms of shrinkage uniformity and printability of the film.
- the polyester film may be uniaxially stretched.
- the polyester film has a stretch ratio in the main shrinkage direction of 3 to 6 times, 3.5 to 5 times, 4 to 5, 4 to 4.5 times, 4.2 to 5 times, or 4.2 to 4.5 times.
- the polyester film may have a draw ratio of 4 to 5 times in the main shrinkage direction.
- the main shrinkage direction of the polyester film may be a width direction (tenter direction, TD) or a longitudinal direction (machine direction, MD) of the film.
- the main shrinkage direction of the polyester film may be the width direction (TD)
- the direction perpendicular to the main shrinkage direction may be the length direction (MD), but is not particularly limited.
- the polyester film according to the embodiment includes a copolymerized polyester resin.
- the copolymer polyester resin is obtained by polymerizing two or more diols and dicarboxylic acids. Specifically, the copolymer polyester resin is obtained by polymerization of three or more diols and dicarboxylic acids.
- the diol may include an aliphatic diol, an alicyclic diol, an aromatic diol, or a derivative thereof.
- the aliphatic diol may be, for example, an aliphatic diol having 2 to 10 carbon atoms, and may have a linear or branched structure.
- the aliphatic diol is ethylene glycol, diethylene glycol, neopentyl glycol, 1,3-propanediol, 1,2-octanediol, 1,3-octanediol, 2,3-butanediol, 1,3- Butanediol, 1,4-butanediol, 1,5-pentanediol, 2-butyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,5-pentanediol, 2,4-diethyl -1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,1-dimethyl-1,5-pentanediol, 1,6-hexanediol, 2-ethyl-3-methyl-1,5 -Hexanediol, 2-ethyl-3-ethy
- the dicarboxylic acid may include an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, an alicyclic dicarboxylic acid, or an ester thereof.
- the dicarboxylic acid is terephthalic acid, dimethyl terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, orthophthalic acid, adipic acid, azelaic acid, sebacic acid, decanedicarboxylic acid, esters thereof; or a combination thereof.
- the dicarboxylic acid may include at least one selected from the group consisting of terephthalic acid, dimethyl terephthalate, naphthalenedicarboxylic acid, and orthophthalic acid.
- the co-polyester resin may include two or more diols; and aromatic dicarboxylic acids are polymerized.
- the co-polyester resin is three or more kinds of diol; and aromatic dicarboxylic acids are polymerized.
- the co-polyester resin is a diol comprising ethylene glycol and at least one comonomer; and aromatic dicarboxylic acids are polymerized.
- the co-polyester resin is a diol comprising ethylene glycol and two or more comonomers; and aromatic dicarboxylic acids are polymerized.
- the diol may include 50 mol% to 90 mol% of ethylene glycol based on the total number of moles of the diol.
- the diol may contain ethylene glycol in an amount of 60 mol% to 90 mol%, 63 mol% to 85 mol%, or 65 mol% to 83 mol% based on the total number of moles of the diol.
- the diol may include 10 mol% to 50 mol% of the comonomer based on the total number of moles of the diol.
- the diol may include 10 mol% to 40 mol%, 15 mol% to 37 mol%, or 17 mol% to 35 mol% of the comonomer based on the total number of moles of the diol.
- the diol may include the remaining diols except for ethylene glycol among the diols exemplified above as a comonomer.
- the diol as a comonomer is diethylene glycol, 1,4-cyclohexanedimethanol, 1,3-propanediol, 1,2-octanediol, 1,3-octanediol, 2,3-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, neopentyl glycol, 2-butyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,5-pentane diol, 2,4-diethyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,1-dimethyl-1,5-pentanedio
- the diol may include diethylene glycol as a comonomer.
- the content of diethylene glycol in the diol may be 1 mol% to 15 mol%, for example, 1 mol% to 10 mol%, 1 mol% to 5 mol%, 5 mol% to 10 mol%, or 3 mol% % to 7 mol%.
- the diol may include at least one of neopentyl glycol and cyclohexanedimethanol as a comonomer.
- the content of neopentyl glycol and/or cyclohexanedimethanol in the diol may be 1 mol% to 50 mol%, for example, 10 mol% to 40 mol%, 10 mol% to 30 mol%, 20 mol% to 40 mol%, 20 mol% to 30 mol%, 20 mol% to 25 mol%, or 25 mol% to 30 mol%.
- the diol is at least one selected from neopentyl glycol and cyclohexanedimethanol as a comonomer; and diethylene glycol.
- the diol is 20 mol% to 30 mol% of at least one selected from neopentyl glycol and cyclohexanedimethanol as a comonomer; and 1 mol% to 15 mol% of diethylene glycol.
- the dicarboxylic acid may include 80 mol% or more, 90 mol% or more, or 95 mol% or more of terephthalic acid or dimethyl terephthalate based on the total number of moles of the dicarboxylic acid.
- the dicarboxylic acid may hardly contain isophthalic acid.
- the content of isophthalic acid in the dicarboxylic acid may be 5 mol% or less, 3 mol% or less, or 1 mol% or less.
- the diol contains 20 mol% to 40 mol% of at least one selected from the group consisting of neopentyl glycol, cyclohexanedimethanol, diethylene glycol, and combinations thereof as a comonomer, and in the aromatic dicarboxylic acid
- the content of isophthalic acid may be less than 1 mol%.
- the copolymer polyester resin may be glycol-modified polyethylene terephthalate (PETG).
- the co-polyester resin may further include an alcohol other than the diol, for example, a monohydric alcohol.
- a monohydric alcohol may be methanol, ethanol, isopropanol, allyl alcohol or benzyl alcohol.
- the copolymer polyester resin may be included in an amount of 10 parts by weight to 40 parts by weight, or 15 parts by weight to 30 parts by weight of the monohydric alcohol based on 100 parts by weight of the diol.
- the polyester film according to the embodiment comprises the steps of preparing a copolymerized polyester resin; Melting and casting the copolymer polyester resin to obtain a film; and preheating and stretching the cast film and then heat setting.
- the composition and process conditions are adjusted so that the polyester film finally manufactured by the above method satisfies the characteristics (shrinkage characteristics, etc.) described above.
- the copolymer composition of the copolymerized polyester resin is adjusted, the extrusion and casting temperature of the polyester resin is controlled, the preheating temperature at the time of stretching, the stretching ratio in each direction, and the stretching The temperature and the stretching rate may be adjusted, or the heat treatment temperature and the relaxation rate may be adjusted while performing heat treatment and relaxation after stretching.
- the co-polyester resin may be prepared through a transesterification reaction and a polycondensation reaction, and the components and contents of the diol and dicarboxylic acid used in this case are as exemplified above.
- the co-polyester resin is melted at a temperature of 260 ° C. to 300 ° C., or 270 ° C. to 290 ° C., and extruded and cast to obtain a film.
- the cast film may be preheated after passing through a roll while being fed at a speed of 10 m/min to 110 m/min, or 50 m/min to 90 m/min.
- the preheating may be performed, for example, at 90° C. to 120° C. for 0.01 minute to 1 minute.
- the preheating temperature may be 95°C to 115°C, or 97°C to 113°C
- the preheating time may be 0.05 minutes to 0.5 minutes, or 0.08 minutes to 0.2 minutes, but is not limited thereto.
- the film may be stretched in the first direction.
- the stretching may be performed 3 to 5 times in the first direction at a temperature 20° C. or more lower than the preheating temperature.
- the stretching is 3 times to 4.5 times, 3.5 times to 4.5 times, 4 times to 4.5 times in the first direction at a stretching temperature of 60 ° C to 90 ° C, 70 ° C to 90 ° C, or 75 ° C to 85 ° C, It may be stretched 4 times to 5 times, 4.2 times to 5 times, or 4.2 times to 4.5 times, but is not limited thereto.
- the stretching may be additionally performed in a second direction perpendicular to the first direction, for example, at a stretching ratio of 1.1 times to 2 times, specifically 1.1 times to 1.5 times, as needed with respect to the second direction. can be performed.
- the film may be heat-set, and for example, may be performed at 70° C. to 95° C. for 0.01 to 1 minute.
- the heat setting temperature may be 75 °C to 95 °C, 75 °C to 90 °C, 80 °C to 90 °C, 85 °C to 95 °C, or 85 °C to 90 °C
- the heat setting time is 0.05 minutes to 0.5 minutes, or 0.08 minutes to 0.2 minutes, but is not limited thereto.
- the difference between the preheating temperature and the heat setting temperature may be 10 °C to 40 °C, more specifically 13 °C to 35 °C, 11 °C to 34 °C, 15 °C to 34 °C, or 20 °C to 30 °C.
- the polyester film according to the embodiment is uniformly shrunk in the heat shrink process by controlling the shrinkage rate gradient for each temperature section, it can be in close contact with the container without appearance defects such as distortion or curling after shrinking.
- the shrinkage characteristics of such a polyester film can be implemented in a desired range by controlling the copolymerization component and content of the co-polyester resin constituting it and controlling the process conditions in the manufacturing process.
- the polyester film according to the embodiment can be usefully applied as a heat-shrinkable label or packaging material to containers of various products including beverages and food.
- the heat-shrinkable label or packaging material according to an embodiment includes the polyester film, and may further include a printing layer, dye, adhesive, and the like.
- Terephthalic acid as a dicarboxylic acid, ethylene glycol as a diol, and a comonomer were added to an autoclave equipped with a stirrer and a distillation column, and manganese acetate as a transesterification catalyst was added in an amount of 0.07 parts by weight based on the weight of dicarboxylic acid, and then the temperature was raised to 220° C. and the by-product The reaction proceeded while phosphorus methanol was removed.
- the composition containing the copolymer polyester resin prepared in step 1 was extruded at 270° C. through a T-die and cooled to obtain an unstretched sheet, and passed through a roll to control the thickness.
- the unstretched sheet was preheated at 100 to 110° C. for 0.1 minutes while being transferred at a speed of 55 m/min, and stretched 4.0 to 4.5 times in the width direction (TD) at a temperature 20° C. or more lower than this.
- the stretched sheet was heat-set for 0.1 minutes to prepare a polyester film having a thickness of 40 ⁇ m.
- Figure 2 shows a method for measuring the shrinkage of the polyester film.
- the polyester film 100 was cut into an initial dimension (x1) of 300 mm in a direction to be measured and a dimension (y) of 15 mm in a direction perpendicular thereto. After immersing this in a heated water bath for 10 seconds, the dimension (x2) of the shrunken polyester film 100a was measured and calculated according to the following formula.
- the shrinkage rate (%) and T ab (%/°C) were obtained for the width direction (TD), which is the main shrinkage direction of the film, and the results are shown in the table below.
- the polyester films of Examples 1 to 4 were adjusted to have a shrinkage ratio for each temperature in the main shrinkage direction (TD) and a shrinkage ratio for each temperature section in a preferable range.
- Figure 3 shows a method of measuring the skirt ratio (skirt ratio) of the polyester film.
- the polyester film 100 was cut to an initial dimension (x1) of 60 mm in the direction to be measured and fixed to a heat setting frame 4 having a width (y) of 115 mm. This was immersed in a water bath at 90° C. for 10 seconds, and then the reduced dimension (x2) was measured.
- TD width direction
- MD length after contraction in the longitudinal direction
- ⁇ SR (mm) x1 (mm) - x2 (mm)
- SR% (%) [ ⁇ SR (mm) / y (mm)] x 100
- Figure 4 shows a method for measuring the shrinkage stress of the polyester film.
- the polyester film 100 is cut to have an initial dimension (x) 110 mm in the direction to be measured, an extra dimension (z) 5 mm at both ends, and a dimension (y) 15 mm in a direction perpendicular thereto did
- the cut film was mounted on a stress tester (2), and both ends of the film were fixed to a jig (21) with an interval of 100 mm.
- the film-equipped measuring instrument was immersed in a water bath at 90° C. for 1 minute, and the maximum stress (S MAX ) during the contraction process and the residual stress after contraction (S RES ) were measured with the load cell 22 .
- S MAX maximum stress
- S RES residual stress after contraction
- polyester films of Examples 1 to 4 were measured both in shrinkage stress and skirt ratio within a preferable range.
- Figure 5 shows a method for measuring the shrinkage uniformity of the polyester film.
- a grid 110 is printed on a polyester film to produce a heat-shrinkable label 10, and an adhesive portion having a width of 3 mm at both ends in the width direction (TD), which is the main shrinkage direction ( 120) was prepared.
- the dimensions of the heat-shrinkable label were a width (W) 180 mm and a length (L) 100 mm excluding the adhesive part 120, and a square-shaped grid unit 111 with a side size (s) of 5 mm was the size of the heat-shrinkable label. 36 spaces in the width direction and 20 spaces in the length direction were formed.
- a solvent such as THF was applied to the adhesive portions 120 at both ends of the heat-shrinkable label and adhered to prepare a sleeve-shaped label 11 .
- the sleeve label 11 was loosely covered in the middle of the can 20 having a diameter (D) of 52 mm and a height of 116 mm, and then immersed in hot water at 75° C. for 10 seconds.
- uniformly shrunk lattice units 111a and non-uniformly shrunk lattice units 111b were observed in the shrunken label 11a.
- an imaginary rectangular lattice unit connecting the corners of the shrunken lattice unit is defined, and four sides of the imaginary rectangular lattice unit and four sides of the shrunken lattice unit corresponding thereto are respectively defined.
- the shrinkage uniformity (%) was calculated according to the following formula.
- Non-uniformly contracted lattice unit 111b The maximum separation distance d between the four sides of the virtual quadrangular lattice unit corresponding to each other and the four sides of the shrunken lattice unit is the virtual quadrangular lattice unit. Grid units exceeding 10% based on the size of each side (L0) of the unit
- Shrinkage uniformity (number of uniformly shrunk grid units / total number of grid units) x 100
- polyester films of Examples 1 to 4 had all shrinkage uniformity measured with various grid sizes within a preferable range.
- polyester films of Comparative Examples 1 to 3 it was confirmed that the shrinkage uniformity measured with various lattice sizes was generally outside the preferred range.
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Abstract
Description
구 분 | 공단량체 함량(몰%) | TD 연신비 | 열고정온도(℃) | |||
NPG | CHDM | DEG | IPA | |||
실시예 1 | 24 | - | 5 | - | 4.5 | 92 |
실시예 2 | - | 22 | 10 | - | 4.5 | 90 |
실시예 3 | 30 | - | 5 | - | 4.5 | 90 |
실시예 4 | - | 30 | 2 | - | 4.5 | 89 |
비교예 1 | 17 | - | 5 | - | 4.15 | 65 |
비교예 2 | 17 | - | 5 | - | 4.15 | 94 |
비교예 3 | 15.8 | - | 1.8 | 5.3 | 4.15 | 90 |
NPG: 네오펜틸글리콜, CHDM: 1,4-사이클로헥산디메탄올, DEG: 디에틸렌글리콜, IPA: 이소프탈산 |
구 분 | TD 수축률 (%) | Ta-b (%/℃) | |||||
70℃ | 75℃ | 80℃ | 90℃ | 100℃ | T75-70 | T90-80 | |
실시예 1 | 2.7 | 11.7 | 26.7 | 56.3 | 67.3 | 1.8 | 2.96 |
실시예 2 | 11.3 | 22.7 | 32.4 | 50 | 61.3 | 2.28 | 2.06 |
실시예 3 | 15 | 30 | 44 | 70 | 74 | 3 | 2.6 |
실시예 4 | 5 | 17 | 35 | 55 | 70 | 2.4 | 2 |
비교예 1 | 50 | 66 | 72 | 75.3 | 76 | 3.2 | 0.33 |
비교예 2 | 5 | 17 | 32 | 46 | 57 | 2.4 | 1.4 |
비교예 3 | 0 | 2 | 18 | 41 | 56 | 0.4 | 2.3 |
구 분 | 수축 응력 (N) | ΔSR(mm) | SR%(%) | |
최대 | 잔류 | |||
실시예 1 | 4.0 | 3.4 | 8 | 7.0 |
실시예 2 | 3.7 | 2.9 | 8 | 7.0 |
실시예 3 | 4.5 | 3.0 | 6 | 5.2 |
실시예 4 | 4.4 | 3.1 | 6 | 5.2 |
비교예 1 | 7.5 | 5.5 | 18 | 15.7 |
비교예 2 | 4.9 | 4.0 | 12 | 10.4 |
비교예 3 | 4.7 | 3.6 | 8 | 7.0 |
구 분 | 수축 균일도(%) | |||
초기 격자 크기 5 mm | 초기 격자 크기 1 cm | 초기 격자 크기 2 cm | 초기 격자 크기 4 cm | |
실시예 1 | 98 | 98 | 99 | 100 |
실시예 2 | 92 | 91 | 98 | 97 |
실시예 3 | 94 | 97 | 100 | 100 |
실시예 4 | 92 | 93 | 97 | 96 |
비교예 1 | 89 | 87 | 92 | 89 |
비교예 2 | 88 | 86 | 88 | 88 |
비교예 3 | 85 | 85 | 87 | 87 |
Claims (14)
- 제 1 항에 있어서,상기 폴리에스테르 필름을 X℃의 온도에서 10초간 열처리 시에 주수축 방향의 수축률을 TX라고 정의할 때, T70이 0% 내지 20%이고, T75가 5% 내지 40%이고, T80이 20% 내지 50%이고, T90이 40% 내지 80%인, 폴리에스테르 필름.
- 제 1 항에 있어서,상기 폴리에스테르 필름을 주수축 방향으로 고정하고 90℃에서 10초간 열처리 시에, 하기 식에 따른 SR%가 10% 이하인, 폴리에스테르 필름:SR% = [(x1 - x2) / y] x 100상기 식에서x1은 주수축 방향에 수직한 방향에 대한 열처리 이전의 치수(mm)이고,x2는 주수축 방향에 수직한 방향에 대한 열처리 이후의 치수(mm)이고,y는 주수축 방향의 치수(mm)이다.
- 제 1 항에 있어서,상기 폴리에스테르 필름을 90℃에서 1분간 열처리 시에, 주수축 방향의 최대 응력이 3 N 내지 4.5 N이고 잔류 응력이 2 N 내지 3.5 N 인, 폴리에스테르 필름.
- 제 1 항에 있어서,상기 폴리에스테르 필름 내의 180 mm×100 mm(가로×세로)의 영역을 한 변의 크기가 5 mm인 정사각형의 격자 단위들로 구획한 뒤 75℃에서 10초간 열처리하여 수축 시에, 아래 식 (1)에서 계산되는 제 1 수축 균일도가 90% 이상인, 폴리에스테르 필름:제 1 수축 균일도(%) = 균일하게 수축된 격자 단위의 개수 / 전체 격자 단위(초기 크기 5 mm)의 개수 x 100 ... (1)상기 식 (1)에서 균일하게 수축된 격자 단위의 개수는, 수축된 격자 단위의 모서리들을 연결하는 가상의 사각형 격자 단위를 정의할 때, 각각 서로 대응되는 상기 가상의 사각형 격자 단위의 4개의 변과 상기 수축된 격자 단위의 4개의 변 사이의 최대 이격 거리가, 상기 가상의 사각형 격자 단위의 각각의 변의 크기를 기준으로 10% 이내인 격자 단위의 개수를 의미한다.
- 제 5 항에 있어서,상기 폴리에스테르 필름 내의 180 mm×100 mm(가로×세로)의 영역을 한 변의 길이가 1 cm인 정사각형의 격자 단위들로 구획한 뒤 75℃에서 10초간 열처리하여 수축 시에, 아래 식 (2)에서 계산되는 제 2 수축 균일도가 90% 이상인, 폴리에스테르 필름:제 2 수축 균일도(%) = 균일하게 수축된 격자 단위의 개수 / 전체 격자 단위(초기 크기 1 cm)의 개수 x 100 ... (2)상기 식 (2)에서 균일하게 수축된 격자 단위의 개수는, 수축된 격자 단위의 모서리들을 연결하는 가상의 사각형 격자 단위를 정의할 때, 각각 서로 대응되는 상기 가상의 사각형 격자 단위의 4개의 변과 상기 수축된 격자 단위의 4개의 변 사이의 최대 이격 거리가, 상기 가상의 사각형 격자 단위의 각각의 변의 크기를 기준으로 10% 이내인 격자 단위의 개수를 의미한다.
- 제 6 항에 있어서,상기 폴리에스테르 필름 내의 180 mm×100 mm(가로×세로)의 영역을 한 변의 길이가 2 cm인 정사각형의 격자 단위들로 구획한 뒤 75℃에서 10초간 열처리하여 수축 시에, 아래 식 (3)에서 계산되는 제 3 수축 균일도가 90% 이상인, 폴리에스테르 필름:제 3 수축 균일도(%) = 균일하게 수축된 격자 단위의 개수 / 전체 격자 단위(초기 크기 2 cm)의 개수 x 100 ... (3)상기 식 (3)에서, 균일하게 수축된 격자 단위의 개수는, 수축된 격자 단위의 모서리들을 연결하는 가상의 사각형 격자 단위를 정의할 때, 각각 서로 대응되는 상기 가상의 사각형 격자 단위의 4개의 변과 상기 수축된 격자 단위의 4개의 변 사이의 최대 이격 거리가, 상기 가상의 사각형 격자 단위의 각각의 변의 크기를 기준으로 10% 이내인 격자 단위의 개수를 의미한다.
- 제 7 항에 있어서,상기 폴리에스테르 필름 내의 180 mm×100 mm(가로×세로)의 영역을 한 변의 길이가 4 cm인 정사각형 격자 단위들로 구획한 뒤 75℃에서 10초간 열처리하여 수축 시에, 아래 식 (4)에서 계산되는 제 4 수축 균일도가 90% 이상인, 폴리에스테르 필름:제 4 수축 균일도(%) = 균일하게 수축된 격자 단위의 개수 / 전체 격자 단위(초기 크기 4 cm)의 개수 x 100 ... (4)상기 식 (4)에서, 균일하게 수축된 격자 단위의 개수는, 수축된 격자 단위의 모서리들을 연결하는 가상의 사각형 격자 단위를 정의할 때, 각각 서로 대응되는 상기 가상의 사각형 격자 단위의 4개의 변과 상기 수축된 격자 단위의 4개의 변 사이의 최대 이격 거리가, 상기 가상의 사각형 격자 단위의 각각의 변의 크기를 기준으로 10% 이내인 격자 단위의 개수를 의미한다.
- 제 5 항 내지 제 8 항 중 어느 한 항에 있어서,상기 폴리에스테르 필름의 가로 방향이 상기 폴리에스테르 필름의 주수축 방향인, 폴리에스테르 필름.
- 제 1 항에 있어서,상기 디올이 공단량체로서 네오펜틸글리콜, 사이클로헥산디메탄올, 디에틸렌글리콜 및 이들의 조합으로 이루어진 군에서 선택되는 적어도 하나를 20 몰% 내지 40 몰%로 포함하고, 상기 방향족 디카복실산 중의 이소프탈산의 함량이 1 몰% 미만인, 폴리에스테르 필름.
- 제 1 항에 있어서,상기 디올이 공단량체로서 네오펜틸글리콜 및 사이클로헥산디메탄올 중에서 선택된 적어도 1종 20 몰% 내지 30 몰%; 및 디에틸렌글리콜 1 몰% 내지 15 몰%를 포함하는, 폴리에스테르 필름.
- 제 1 항에 있어서,상기 폴리에스테르 필름은 주수축 방향으로 4배 내지 5배의 연신비를 갖는, 폴리에스테르 필름.
- 제 1 항의 폴리에스테르 필름을 포함하는, 열수축성 라벨.
- 제 1 항의 폴리에스테르 필름을 포함하는, 열수축성 포장재.
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KR102469389B1 (ko) | 2022-11-22 |
MX2023004553A (es) | 2023-05-08 |
KR20220162105A (ko) | 2022-12-07 |
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