WO2012102463A1 - 폴리유산 수지 필름 - Google Patents
폴리유산 수지 필름 Download PDFInfo
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- WO2012102463A1 WO2012102463A1 PCT/KR2011/008308 KR2011008308W WO2012102463A1 WO 2012102463 A1 WO2012102463 A1 WO 2012102463A1 KR 2011008308 W KR2011008308 W KR 2011008308W WO 2012102463 A1 WO2012102463 A1 WO 2012102463A1
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- polylactic acid
- film
- acid resin
- repeating unit
- resin
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- 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
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/428—Lactides
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
-
- 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
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- 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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
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- 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
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Definitions
- the present invention relates to a polylactic acid resin film. More specifically, the present invention exhibits biodegradability peculiar to polylactic acid resin, and shows optimized physical properties such as excellent flexibility, mechanical properties, stability, and transparency, so that the polylactic acid resin film can be usefully used for packaging. It is about.
- This application claims the benefit of the date of application of Korean Patent Application Nos. 10-2011-0007365 to 10-2011-0007367 filed on January 25, 2011, the entire contents of which are incorporated herein.
- Crude oil-based resins such as polyethylene terephthalate, nylon, polyolefin, or soft polyvinyl chloride (PVC) are still widely used as materials for various applications such as packaging materials.
- PVC polyvinyl chloride
- such crude oil-based resins do not have biodegradability, and thus, there is a problem of causing environmental pollution such as discharging a large amount of carbon dioxide, which is a global warming gas, at the time of disposal.
- biomass-based resins typically polylactic acid resins, which are biodegradable in recent years, have been widely studied.
- polylactic acid resins do not have sufficient heat resistance or mechanical properties compared to crude oil-based resins, it is true that there are limitations in the fields or applications to which they can be applied.
- polylactic acid resin as a packaging material such as a packaging film, but such applications are facing limitations due to the low flexibility of the polylactic acid resin.
- a method of adding a low molecular weight softener or a plasticizer to the polylactic acid resin, or introducing a plasticizer obtained by addition-polymerizing a polyether or aliphatic polyester poly to the polylactic acid resin is proposed. It has been.
- the packaging film containing the polylactic acid resin according to these methods It is true that in most cases, there is a limit to improving the flexibility even if it is obtained.
- the plasticizers, etc. bleed out over time, exhibit low stability, and contaminate the contents of the package, which is often unsuitable for food packaging materials.
- due to the bleeding out of the plasticizer component and the like there were also disadvantages in that the haze of the packaging film was increased and the transparency was lowered.
- when focusing only on the improvement of flexibility, mechanical properties or blocking resistance, etc. were greatly reduced, which was often unsuitable for use for packaging.
- the present invention provides a polylactic acid resin film that exhibits biodegradability peculiar to polylactic acid resin but also exhibits optimized physical properties such as excellent flexibility, mechanical properties, stability, and transparency.
- the present invention provides a hard segment including a polylactic acid repeating unit represented by Formula 1 below; And a polylactic acid resin including a soft segment including a polyether-based polyether of Formula 2, repeating units of which are repeating units of a polyurethane poly, which are linearly connected via a urethane bond, and a Young's modulus in the longitudinal and width directions It provides a polylactic acid resin film having a thickness of 350 to 750 kg £ 1 ⁇ 2f and a total initial tensile strength in the longitudinal direction and the width direction of 20 kgf1 ⁇ 2f or more:
- A is a linear or branched alkylene group having 2 to 5 carbon atoms, m is an integer of 10 to 100, n is an integer of 700 to 5000.
- the hard segment including a polylactic acid repeating unit of the formula (1); And a polylactic acid resin including a soft segment including a polyurethane polyol repeating unit in which the polyether-based polyol repeating units of Formula 2 are linearly connected through a urethane bond, and the sum of Young's modulus in the longitudinal and width directions is
- a polylactic acid resin film having about 350 to 750 kgf / mirf and having an initial tensile strength sum of at least about 20 kgf / nmf in the longitudinal and width directions:
- A is a linear or branched alkylene group having 2 to 5 carbon atoms, m is an integer of 10 to 100, n is an integer of 700 to 5000.
- the polylactic acid resin which is a main component of such a film, basically includes a polylactic acid repeating unit represented by Chemical Formula 1 as a hard segment.
- Such polylactic acid resins and films basically show biodegradability peculiar to biomass-based resins by including polylactic acid repeating units as hard segments.
- the polyurethane polyol repeating unit is included as a soft segment, so that the polylactic acid resin not only shows greatly improved flexibility, but also provides a film showing excellent transparency, low haze value and improved stability. It turned out to be possible.
- the film made of the polylactic acid resin at a temperature of 20 ° C and a relative humidity of 65% using an Instron 1123 UTM universal testing machine with a drawing speed of 300mm / min, the distance between the grip 100mm, 10mm in width, 150mm in length
- the Young's modulus in the longitudinal and width directions is about 350 to 750 kgf / mnf, preferably about 450 to 650 kgf / mnf, preferably about 500 to 600 kgf / mnf
- the total initial tensile strength in the width direction is about 20 kgf / mnf or more, preferably about 20 to 60 kg £ 1 ⁇ 2f.
- the physical properties of such a film may be due to the structural properties of the polylactic acid resin described above.
- the polylactic acid resin reacts a polyether polyol repeating unit with a diisocyanate compound to form a repeating unit of a polyurethane polyol repeating unit in which a plurality of polyether polyol repeating units are linearly linked by a urethane bond, and then copolymerizes it with the polylactic acid repeating unit.
- Block copolymers are also be made from a polyether polyol repeating unit with a diisocyanate compound to form a repeating unit of a polyurethane polyol repeating unit in which a plurality of polyether polyol repeating units are linearly linked by a urethane bond.
- the film including the same may exhibit optimized properties in terms of flexibility as well as other physical properties such as mechanical properties, for example, the above-described Young's modulus sum range and The sum of the initial tensile strengths may be stratified.
- the excellent physical properties of such a film may be attributable to an optimized production method or form (for example, a biaxially stretched film or the like) of the film described below using the polylactic acid resin.
- the polylactic acid resin contains the block copolymer and the like, components such as soft segments and residual monomers Bleeding out is reduced so that the film exhibits good stability and can exhibit relatively low weight change rates even when heat treated at high temperatures.
- the film may exhibit excellent transparency and low haze.
- the film satisfies a specific Young's modulus total range, such films can exhibit flexibility and stiffness optimized for packaging and the like.
- the total Young's modulus is too low, spreading or loosening may occur during the film forming and processing of the film, and the handleability, process permeability, slit processability, or shape retention characteristics may be poor.
- the release property may be insufficient due to the lack of slip property of the film, or the packaging may be difficult due to the deformation of the film before surrounding the article or food such as a container.
- the Young's modulus sum is excessively high, the film has low flexibility and stiffness is too high, and when the film is folded during the packaging process, the folding line remains as it is, resulting in poor appearance, or excessive noise occurs when packing the film. It may not be deformed depending on the shape of the article or food, which may cause difficulty in packaging.
- the film when the film is subjected to a tensile test under the same conditions as the Young's modulus, the film satisfies the specific initial tensile strength sum range described above. If the initial tensile strength is less than this, the handleability of the film may be poor, and even after packaging, the film may be easily broken and a risk of contents damage may occur. On the contrary, the film of the embodiment may exhibit excellent mechanical properties that can be preferably used for packaging and the like, as the specific initial tensile strength total range is satisfied.
- the polylactic acid resin film of the above embodiment shows biodegradability and shows various physical properties such as excellent flexibility, mechanical properties, stability, and transparency, and thus may be very preferably used for packaging.
- the film of one embodiment will be described in more detail.
- the polylactic acid resin which is a main component of the film, will be described in detail, and then a film including the same will be described in detail.
- the polylactic acid repeating unit of Formula 1 may refer to a polylactic acid homopolymer or a repeating unit forming the same.
- Such polylactic acid repeating units can be obtained according to methods for preparing polylactic acid homopolymers well known to those skilled in the art.
- L-lactide or D-lactide which is a cyclic dimer, can be obtained by ring-opening polymerization from L-lactic acid or D-lactic acid, or by direct dehydration polycondensation of L-lactic acid or D-lactic acid. It is preferable to obtain a polylactic acid repeating unit having a higher degree of polymerization through the ring-opening polymerization method.
- the polylactic acid repeating unit may be prepared to have amorphous by copolymerizing L-lactide and D-lactide in a predetermined ratio, in order to further improve the heat resistance of the film containing the polylactic acid resin, It is preferable to prepare by the method of homopolymerization using either L-lactide or D-lactide. More specifically, the polylactic acid repeating unit can be obtained by ring-opening polymerization using L-lactide or D-lactide raw material having an optical purity of about 98% or more, and if the optical purity is less than this, the melting temperature of the polylactic acid resin ( Tm) can be lowered.
- the polyurethane polyol repeating unit is included as a soft segment, flexibility of the film including the polylactic acid resin may be greatly improved.
- the polyurethane polyol repeating unit makes it possible to provide a film exhibiting excellent physical properties without deteriorating heat resistance, blocking resistance, mechanical properties, or transparency of the polylactic acid resin or a film including the same.
- polylactic acid-based copolymers containing soft segments in which polyester polyol repeating units are connected by urethane bonds have been known.
- a polylactic acid copolymer has problems such as low transparency of the polyester polyol and polylactic acid, resulting in lower transparency of the film and higher haze value.
- such a polylactic acid copolymer has a wide molecular weight distribution and an excessively low glass transition temperature, poor melting characteristics, poor film extrusion, and insufficient mechanical properties, heat resistance, and blocking resistance of the film.
- a polylactic acid copolymer having a polyether polyol repeating unit copolymerized with a polylactic acid repeating unit and a branched form using a trifunctional or higher functional isocyanate compound, or after copolymerizing the polyether polyol repeating unit and polylactic acid repeating unit Polylactic acid copolymers in the form of chain extension with urethane reactions have also been previously known. However, these previously known polylactic acid copolymers also have a small block size of the polylactic acid repeating units in the hard segment and an excessively low glass transition temperature, resulting in poor heat resistance, mechanical properties and blocking resistance of the film. However, the film still had problems such as poor molecular weight distribution and poor melting characteristics, resulting in poor film extrusion.
- the film made of this type of polylactic acid resin seems to induce decomposition of the polylactic acid resin during film production or use as an excessive amount of catalyst is required during resin production, and thus exhibits low stability, haze and It was confirmed that it causes problems such as poor light transmittance and pin hole generation.
- the polylactic acid resin in which a plurality of polyether polyol repeating units includes a polyurethane polylinked linearly linked through a urethane bond, includes a repeating unit and a polylactic acid repeating unit, While providing a film showing excellent flexibility by polyurethane polyol repeating units, the film has excellent mechanical properties and heat resistance, including optimized glass transition temperature, low molecular weight distribution, and containing polylactic acid repeating units in large segment sizes. And blocking resistance, etc. do. Therefore, the polylactic acid resin included in the film of one embodiment solves all the problems of the copolymers previously known, thereby providing various films including excellent transparency and stability and at the same time providing a film having greatly improved flexibility. Turned out.
- the polyether polyol repeating unit and the diisocyanate compound react so that the molar ratio of the terminal hydroxyl group of the polyether polyol repeating unit: the isocyanate group of the compound of the diisocyanate compound is about 1: 0.50 to 1: 0.99.
- Polyurethane polyol repeating units may be formed.
- the reaction ratio of terminal hydroxyl groups of the polyether-based polyol repeating units: isocyanate groups of the diisocyanate compound is about 1: 0.60 to 1: 0.90, more preferably about 1: 0.70 to 1: 0.85. Can be.
- the polyurethane polyol repeating unit refers to a polymer or a repeating unit forming the polyether-based polyol repeating units are linearly connected via a urethane bond, having a hydroxyl group at the terminal Can be. Accordingly, the polyurethane polyol repeating unit may act as an initiator in the polymerization process for forming the polylactic acid repeating unit. However, if the reaction molar ratio of the hydroxy group: isocyanate group is excessively higher than about 0.99, the number of terminal hydroxyl groups of the polyurethane polyol repeating unit may be insufficient (OHV ⁇ 3), and thus may not function properly as an initiator.
- the polyether polyol repeating unit may be, for example, a polyether polyol (co) polymer obtained by ring-opening (co) polymerizing one or more alkylene oxides or a repeating unit thereof.
- alkylene oxide include ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, and the like, and polyether-based compounds obtained therefrom
- polyol repeating units include repeating units of polyethylene glycol (PEG); Repeating units of poly (1,2-propyleneglycol); Repeat units of poly (1,3-propanediol); Repeating units of polytetramethylene glycol; Repeating units of polybutylene glycol; Repeating units of polyols which are copolymers of propylene oxide and tetrahydrofuran; Repeating units of polyols which are copolymers of ethylene oxide and tetrahydrofuran; Or the repeating unit of the polyol which is a copoly
- the polyether poly repeating unit may be a repeating unit of poly (1,3-propanediol) or polytetramethylene glycol as a repeating unit. It is preferable to use a repeating unit of, and the polyether-based poly repeating unit may have a number average molecular weight of about 400 to 9000, preferably about 1000 to 3000.
- the diisocyanate compound capable of forming a urethane bond by bonding to the terminal hydroxyl group of the polyether polyol repeating unit may be any compound having two isocyanate groups in a molecule.
- diisocyanate compounds include 1,6-nucleated methylene diisocyanate, 2,4-toluene diisocyanate, 2,6-luluene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, 1,5- naphthalene diisocyanate, m-phenylene diisocyanate, P- phenylene diisocyanate, 3,3'- dimethyl- 4, 4'- diphenylmethane diisocyanate, 4, 4'- bisphenylenedi isocyanate, nucleomethylene Diisocyanate, isophorone diisocyanate or hydrogenated diphenylmethane diisocyanate, and the like, and various
- the polylactic acid resin described above included in the film of one embodiment may include a block copolymer in which the polylactic acid repeating unit of the hard segment is combined with the polyurethane polyol repeating unit of the soft segment. More specifically, in such a block copolymer, the terminal of the polylactic acid repeating unit The carboxyl group may form ester bonds with the terminal hydroxy groups of the repeating polyurethane poly.
- the chemical structure of such block copolymer can be represented by the following general formula (1):
- E represents a polyether-based poly repeating unit
- U represents a urethane bond
- Ester represents an ester bond.
- the polylactic acid repeating unit and the polyurethane polyol repeating unit includes a block copolymer bonded to each other, the polyurethane polyol repeating unit for the flexibility can be suppressed while bleeding out of the film formed of the polylactic acid resin Various physical properties such as transparency, mechanical properties, heat resistance or blocking resistance can be excellent.
- the polylactic acid repeating unit and the polyurethane poly repeating unit take the form of a block copolymer
- the glass transition temperature (Tg) and the melting temperature (Tm) of the polylactic acid resin are optimized and thus the flexibility of the film Blocking resistance, heat resistance, etc. can be improved more.
- the polylactic acid repeating units included in the polylactic acid resin need to be in the form of a block copolymer combined with the polyurethane polyol repeating unit, and at least some of the polylactic acid repeating units are the polyurethane polyols. It may also take the form of a polylactic acid homopolymer without being bound to repeating units. In this case, the polylactic acid resin may be in the form of a complex comprising the block copolymer described above and a polylactic acid repeating unit that is not bonded to the polyurethane repeating unit, that is, a polylactic acid homopolymer.
- the polylactic acid resin is based on its total weight (the weight of the blotok copolymer described above, and, optionally, if the polylactic acid homopolymer is included, the sum of the weights of such homopolymer), about and 80 to 95% by weight, may comprise from about 5 to 20% by weight of the soft segment, and preferably with about 82 to 92 weight 0/0 of the hard segment, from about 8 to 18% by weight of the soft segment, more preferably Preferably about 85 to 90 percent of the hard segment. Wt% and about 10-15% by weight of the soft segment.
- the content of the soft segment When the content of the soft segment is excessively high, it may be difficult to provide a high molecular weight polylactic acid resin, which may lower mechanical properties such as strength of the film.
- the glass transition temperature is lowered, the slipperiness (slipping), handling or shape retention characteristics or blocking resistance, etc. in the packaging process using the film may be inferior.
- the content of the soft segment is too low, there is a limit in improving the flexibility of the polylactic acid resin and the film.
- the glass transition temperature of the polylactic acid resin may be excessively high, and thus the flexibility of the film may be reduced, and the polyurethane polyol repeating unit of the soft segment is difficult to properly function as an initiator, resulting in poor polymerization conversion or high molecular weight polylactic acid resin. It may not be manufactured.
- the polylactic acid resin may further include a phosphorus-based stabilizer and / or antioxidant in order to suppress the oxidation or thermal decomposition of the soft segment and the like in the manufacturing process.
- a phosphorus-based stabilizer and / or antioxidant examples include Hindered phenol antioxidants, amine antioxidants, thio antioxidants, and phosphite antioxidants. The kinds of each of these stabilizers and antioxidants are well known to those skilled in the art.
- the polylactic acid resins may contain various known plasticizers, ultraviolet stabilizers, anti-colorants, matte agents, deodorants, flame retardants, weathering agents, antistatic agents, mold release agents, antioxidants, etc.
- grains, may be further included.
- plasticizer examples include phthalic ester plasticizers such as diethyl phthalate, dioctyl phthalate and dicyclonuclear phthalate; Aliphatic dibasic acid ester plasticizers such as di-1-butyl adipic acid, di-n-octyl adipic acid, di-n-butyl sebacic acid, and di-2-ethyl nucleus azerate; Phosphoric ester plasticizers such as diphenyl-2-ethyl nucleus phosphate and diphenyl octyl phosphate; Hydroxy polyhydric carboxylic acid ester plasticizers such as acetyl citric acid tributyl, acetyl citric acid tri-2-ethyl nucleus and tributyl citric acid; Fatty acids such as acetyl ricinolic acid methyl, stearic acid diam Ester plasticizers; Polyhydric alcohol ester plasticizers such
- the colored pigments include inorganic pigments such as carbon black, titanium oxide, zinc oxide and iron oxide; Organic pigments such as cyanine-based, phosphorus-based, quinone-based, lerione-based, isoindolinone-based and thio-indigo-based; In order to improve the blocking resistance of other films, inorganic or organic particles may be further included. Examples include silica, colloidal silica, alumina, alumina sol, talc, mica, calcium carbonate, polystyrene, polymethyl methacrylate, and silicon. Etc. can be mentioned. In addition, it is possible to include various additives known to be usable in the polylactic acid resin or the film, and the specific kind and obtaining method thereof are well known to those skilled in the art.
- the polylactic acid resin described above for example, the block copolymer contained therein may have a number average molecular weight of about 50,000 to 200,000, preferably a number average molecular weight of about 50,000 to 150,000.
- the polylactic acid resin may have a weight average molecular weight of about 100,000 to 400,000, preferably a weight average molecular weight of about 100,000 to 320,000.
- Such molecular weight may affect the processability and mechanical properties of the polylactic acid resin described above.
- the melt viscosity is too low, the workability to the film or the like may be inferior, even if the processing to the film may be a mechanical property such as strength.
- the molecular weight is too large, the melt viscosity during the melt processing is too high can greatly reduce the productivity of the film.
- the polylactic acid resin for example, the block copolymer contained therein has a molecular weight distribution (Mw / Mn) defined as a ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of about 1.60 to 2.20, preferably Preferably about 1.80 to 2.15.
- Mw / Mn molecular weight distribution
- the polylactic acid resin exhibits such a narrow molecular weight distribution, it exhibits an appropriate melt viscosity and melt characteristics when melt processing by the method of extrusion, thereby exhibiting excellent film extrusion state and processability.
- the film containing the polylactic acid resin may exhibit excellent mechanical properties such as strength.
- melt viscosity When too narrowed (smaller), the melt viscosity may be too large at the processing temperature for extrusion or the like, making it difficult to process as a film, on the contrary, when the molecular weight distribution is too wide (larger), mechanical properties such as the strength of the film are lowered. Or melt viscosity is too small, such as poor melt characteristics may make the molding itself difficult to film or the film extrusion state may not be good.
- the polylactic acid resin for example, the block copolymer contained therein may have a glass transition temperature (Tg) of 25 to 55 ° C, preferably a glass transition temperature (Tg) of about 30 to 55 ° C. have.
- Tg glass transition temperature
- Tg glass transition temperature
- the flexibility or stiffhess of the film containing the polylactic acid resin is optimized so that such a film can be very preferably used for packaging. If the glass transition temperature of the polylactic acid resin is too low, the flexibility of the film may be improved, but as the stiffness is too low, slipping, handling, form retention characteristics, or resistance to the packaging process using the film may be improved. The blocking property or the like may be poor, and therefore, application as a packaging material may be undesirable.
- the film may have low flexibility and too high stiffness, so that the film may not easily be folded and its marks may be lost or the adhesion to the target product may be poor when packaged.
- noise may be excessively generated during film packaging, which may cause a limitation in application as a packaging material.
- the polylactic acid resin may have a melting silver (Tm) of about 160 to 178 ° C, preferably about 165 to 175 ° C. If the melting temperature is too low, the heat resistance of the film containing the polylactic acid resin may be lowered. If the melting temperature is too high, high temperature is required during melt processing by extrusion or the like, or the viscosity may be too high, resulting in deterioration of processing characteristics of the film. Can be. However, the above-mentioned polylactic acid resin is optimized with such a melting temperature, the glass transition temperature, etc., thereby providing a packaging film having excellent melt processability and excellent overall properties including heat resistance with optimized flexibility.
- Tm melting silver
- the polylactic acid resin described above may be one or more alkylene oxides.
- the (co) polymer is reacted with a diisocyanate compound to have a polyurethane polyol repeating unit.
- urethane reactions of (co) polymers and diisocyanate compounds having polyether-based polyol repeating units and the polyether-based polyol repeating units having a polyurethane polyol repeating unit linearly connected through a urethane bond By obtaining the polymer, and then polymerizing it with lactic acid or lactide, a polylactic acid resin having the above-described excellent physical properties or a block copolymer included therein may be prepared.
- the chain extension is performed as described above. Block copolymers having excellent properties and polylactic acid resins containing the same are difficult to produce.
- the amount of the (co) polymer having a polyurethane polyol repeating unit can be properly adjusted according to the molecular weight of the overall polylactic acid resin, the molecular weight of the polyether polyol (co) polymer, or the content of the soft segment. It is also a major factor that enables the polylactic acid resin having excellent physical properties described above to be produced. However, since an appropriate range of the molecular weight of the polylactic acid resin or the content of the soft segment has already been described above, a detailed description thereof will be omitted.
- one or more monomers such as alkylene oxide are ring-opened (co) polymerized to form a (co) polymer having a polyether-based poly repeating unit, which is used to prepare a conventional polyether polyol (co) polymer.
- the (co) polymer, the diisocyanate compound and the urethane reaction catalyst having the polyether-based polyol repeating unit are layered in a reactor, and heated and stirred to perform a urethane reaction.
- two isocyanate groups of the diisocyanate compound and terminal hydroxyl groups of the (co) polymer are bonded to form a urethane bond.
- a (co) polymer having a polyurethane polyol repeating unit in which polyether polyol repeating units are linearly linked through the urethane bond can be formed, which is included as a soft segment of the polylactic acid resin described above.
- the polyurethane polyol (co) polymer is a polyether polyol repeating units (E) are linearly bonded in the form of EUEUE via a urethane bond (U) to form a form having a polyether polyol repeating unit at both ends Can be.
- the urethane reaction can be carried out in the presence of a conventional tin-based catalyst, for example, Stannous Octoate, Dibutyltin Dilaurate, Dioctyltin Dilaurate and the like.
- a conventional tin-based catalyst for example, Stannous Octoate, Dibutyltin Dilaurate, Dioctyltin Dilaurate and the like.
- the urethane reaction can be carried out under reaction conditions for the production of conventional polyurethane resin. For example, after adding a diisocyanate compound and a polyether polyol (co) polymer under a nitrogen atmosphere, the urethane reaction mixture is added thereto and reacted for 1 to 5 hours at a reaction temperature of about 70 to 80 ° C. to repeat the polyurethane polyol unit.
- a (co) polymer having can be prepared.
- lactic acid D or L-lactic acid
- lactide D or L-lactide
- polylactic acid resin it can be prepared a block copolymer contained therein. That is, when the polymerization reaction is performed, a polylactic acid repeating unit included as a hard segment is formed, and the polylactic acid resin is prepared. At this time, the polyurethane polyol repeating unit is bonded to at least a portion of the polylactic acid repeating unit. Block copolymers may be formed.
- the above-described block copolymer (which is included in the film of one embodiment) may be formed.
- block copolymers may include blocks (hard segments) in which polylactic acid repeating units are bonded to each other in relatively large units (molecular weights)
- a film formed of the polylactic acid resin containing the same may have a narrow molecular weight distribution and appropriate Tg. And, it can exhibit excellent mechanical properties and heat resistance accordingly.
- the above known copolymers have a structure in which polylactic acid repeating units having a small unit (molecular weight) are randomly arranged alternately with polyether polyol repeating units, and the like, and thus the film obtained therefrom has a glass transition temperature and the like. It does not meet the characteristics and mechanical properties or heat resistance is not enough.
- the lactide ring-opening polymerization reaction may be performed in the presence of a metal catalyst including an alkaline earth metal, a rare earth metal, a transition metal, aluminum, germanium, tin, antimony, and the like. More specifically, these metal catalysts may be in the form of carbonates, alkoxydes, halides, oxides or carbonates of these metals.
- a metal catalyst including an alkaline earth metal, a rare earth metal, a transition metal, aluminum, germanium, tin, antimony, and the like.
- these metal catalysts may be in the form of carbonates, alkoxydes, halides, oxides or carbonates of these metals.
- tin octylate, titanium tetraisopropoxide, aluminum triisopropoxide, or the like can be used as the metal catalyst.
- the polylactic acid resin may include a block copolymer in which a specific hard segment and a soft segment are combined, and thus may exhibit improved biodegradability of the polylactic acid resin, and may exhibit more improved flexibility.
- bleeding out of the soft segment for providing flexibility can be minimized, and the addition of such soft segments can greatly reduce the mechanical properties, heat resistance, transparency, or haze characteristics of the film.
- the polylactic acid resin is manufactured to have a predetermined glass transition temperature and, optionally, a predetermined melting temperature, a film or the like obtained therefrom may exhibit optimized flexibility and stiffness as a packaging material, as well as melt processability. Also excellent, blocking resistance and heat resistance are further improved. Therefore, such polylactic acid resin can be very preferably applied to packaging materials such as films.
- the film is a polylactic acid resin
- it is included, not only excellent mechanical properties, heat resistance, blocking resistance and transparency, but also can exhibit optimized flexibility and stiffness, it can be very preferably used for packaging applications of various fields.
- Such a film may have various thicknesses according to each application, and may have a thickness of about 5 to about.
- a thickness of about 5 to 100 im in terms of flexibility, handleability and strength preferably about 7 to 50 // m, more preferably about It may have a thickness of 7 to 30 / im.
- the film may have a weight change rate of about 3 wt% or less, preferably about 0.01 to 3.0 wt%, and more preferably about 0.05 to 1.0 wt%, when processed at 100 ° C. hot air oven for 1 hour. These properties may reflect the excellent heat resistance and anti-bleed out characteristics of the film. If the weight change rate is about 3wt% or more, the dimensional stability of the film becomes poor, which means that plasticizers, residual monomers, or additives are bleeded out, and these components may contaminate the contents of the package. It may be difficult to use as a material.
- the film has a haze of about 3% or less, a light transmittance of about 85% or more, preferably a haze of about 2% or less, a light transmittance of about 90% or more, and more preferably a haze Is about 1% or less, and the light transmittance may be about 92% or more. If the haze is excessively large or the light transmittance is excessively low, the contents cannot be easily distinguished when the film is packaged, and the printed image is difficult to be clearly seen when applying the multilayer film using the printing layer.
- the film mentioned above may provide heat sealing property, the gas barrier property of water vapor, oxygen, or carbon dioxide gas, the formation, and the printing property of the food packaging material as needed in the range which does not impair the effect.
- a polymer having such properties blends a compound into a film, or at least one surface of the film is coated with a thermoplastic resin such as an acrylic resin, a polyester resin, a silicone resin, an antistatic agent, a surfactant, a release agent, or the like. You may.
- another film having a function such as a polyolefin sealant or the like may be used. It can also be coextruded and manufactured in the form of a multilayer film. It may also be produced in the form of a multilayer film by other adhesive or lamination methods.
- the above-described film for example, by applying a sequential biaxial stretching method or a simultaneous biaxial stretching method and the like to the polylactic acid resin described above may be heat-fixed after forming in the form of a biaxially stretched film.
- the stretched film forming process is melt extruded the polylactic acid resin on a sheet by an extruder equipped with a T die, and cooled and solidified the sheet-like molten extrudate to obtain an unstretched film, the length of the unstretched film It can advance by the method of extending
- Stretching conditions of the film can be appropriately adjusted according to heat shrinkage characteristics, dimensional stability, strength, Young's modulus and the like.
- the stretching temperature is preferably adjusted to above the glass transition temperature of the polylactic acid resin, below the crystallization temperature.
- the stretching ratio may be in the range of 1.5 to 10 times in the length and width directions, respectively, and the length and the width direction stretching ratio may be adjusted differently.
- the film is finally manufactured through heat setting, and the heat setting is preferably performed at 100 ° C. or more for 10 seconds or more for strength and dimensional stability of the film.
- the film described above not only has excellent flexibility and transparency even when stored for a long time, but also exhibits mechanical properties such as layered strength and anti-bleed out properties. Moreover, the biodegradability peculiar to a polylactic acid resin can be exhibited. Therefore, such a film can be preferably applied as a packaging material in various fields. For example, consumer packaged goods or foodstuffs, general packaging / envelopes, ⁇ / ⁇ food packaging, Shrinkable over-wrapping film, bundle film, sanitary napkins, sanitary napkins, baby products, etc., Lamination film, Shrinkable Label packaging and snack packaging Mat film In addition, it can be widely used as a packaging material for industrial materials such as agricultural multi-film, automotive film protection sheet, garbage bags and compost bags.
- a polylactic acid resin film may be provided that exhibits biodegradability, but also exhibits optimized flexibility and stiffness, excellent mechanical properties, heat resistance, transparency, blocking resistance, and anti-bleed out properties. Therefore, such a polylactic acid resin film can be preferably applied as a packaging material for various fields to replace the packaging film obtained from crude oil-based resin, and can greatly contribute to preventing environmental pollution.
- NCO / OH for the formation of polyurethane polyol repeating units
- Tg glass transition temperature, ° C: differential scanning calorimeter (TA Instruments) After use, the sample was melted and rapidly heated and measured at 10 ° C./min. The baseline near the endothermic curve and the mid value of each tangent line were Tg.
- Tm melting degree, ° C
- ⁇ The melt viscosity is good, so the winding is good on the corner drum.
- O The melt viscosity is slightly low, so it is difficult to wind.
- the X melt viscosity is too low, so the winding is impossible.
- Elongation (%) MD, TD The elongation until break of the film was measured under the same conditions as the tensile strength of (6) above, and the average value of the five tests in total was expressed as a result.
- the longitudinal direction of the film was represented by MD and the width direction by TD.
- F5 (kgf / mnf) MD, TD The slope of the tangent obtained by contacting the point of the stress at 5% deformation in the tensile-distortion curve obtained in the tensile test of (6) above is obtained, and is obtained from this slope.
- the value of the stress at the time of 5% elongation was calculated
- the longitudinal direction of the film was represented by MD and the width direction by TD.
- F100 (kgf / miif) MD 100% obtained from the slope obtained by contacting the tangent point of the stress-distortion curve at 100% deformation in the stress-distortion curve obtained in (6) above. The value of the tension at the time of extension was calculated
- ⁇ No wavy pattern (line), O: Less than 3 wavy patterns (line), x: 5 or more wavy patterns (line).
- Pin Hole Generation and Bleed-Out Characteristics The surface of the film sample after the heat treatment of (12) was observed to determine the occurrence of pin holes. In addition, to the touch The degree to which the low molecular weight plasticizer component was bleed out to the film surface was evaluated according to the following criteria in an A4 size film sample.
- ⁇ No pin hole and bleed out
- O Within 5 pin holes or bleed out but not severe
- X 5 or more pin holes or severe bleed out.
- Haze (%) and light transmittance (%) The film sample was aged for 24 hours in an atmosphere of a temperature of 23 ° C. and a humidity of 65% RH in advance, and a Haze meter (model name: Japan NDH2000) was used in accordance with JIS K7136. The average value was calculated as a result by measuring about three other parts using the same.
- Blocking resistance Using the C OLOR ITP type (manufactured by Coolz) of the stamping foil, aligning the antistatic and printing surfaces of the film sample, for 24 hours under a temperature of 40 ° C and l K g / oif pressure After standing, the blocking state of the antistatic layer and the printed surface was observed. Based on these observations, the blocking resistance between the antistatic layer (A layer) and the printing surface of the in-mold transfer foil was evaluated. At this time, up to O satisfies the practical performance.
- PPDO 2.4 poly (1,3-propanediol); Number average molecular weight 2,400
- PPDO 2.0 poly (1,3-propanediol); Number average molecular weight 2,000
- -PPDO 1.0 poly (1,3-propanediol); Number average molecular weight 1,000
- PTMEG 3.0 polytetramethylene glycol; Number average molecular weight 3,000
- PTMEG 2.0 polytetramethylene glycol; Number average molecular weight 2,000
- -PTMEG 1.0 polytetramethylene glycol; Number average molecular weight 1,000
- PEG 8.0 polyethylene glycol; Number average molecular weight 8,000
- -PBSA 11.0 aliphatic polyester polyols made of 1,4-butanediol and condensates of succinic acid and adipic acid; Number average molecular weight 11,000 2.
- HDI nucleated methylene diisocyanate
- Bayer Desmodur L75 (TRIMETHYLOL PROPANE + 3 leuene diisocyanate)
- TNPP Tris (nonylphenyl) phosphite
- the temperature was raised to 150 ° C to completely dissolve the L- (or D-) lactide, and 120 ppm of the catalyst Tin 2-ethylhexylate relative to the total amount of semi-fung water content through the catalyst inlet was added to the reaction vessel by dilution with 500 ml of luene.
- the reaction was performed at 185 ° C for 2 hours under 1 kg nitrogen pressurization, and 200 ppm of phosphoric acid was added.
- the catalyst was added to the catalyst inlet and mixed for 15 minutes to inactivate the residual catalyst.
- the unbound L- (or D-) lactide was then removed via vacuum reaction until it reached 0.5torr.
- the molecular weight, Tg, Tm and the like of the obtained resin were measured and shown in Table 1.
- the resins A to E are poly (1,3-propanediol) having a molecular weight of 1,000 to 2,400 or polytetramethylene glycol having a number average molecular weight of 1,000 to 3,000 so that the NCO / OHV ratio is 0.5 to 0.99.
- Polyurethane polyol repeating units such as poly (1,3-propanedi) such as poly (1,3-propanedi) to obtain a repeating unit (or (co) polymer) of a polyurethane poly, in which a polyether polyol repeating unit such as poly (1,3-propanedi) is obtained.
- the polylactic acid resin (block copolymer) obtained by use as a segment.
- these polylactic acid resins are to include the polyurethane polyols of the soft segment repeating units to the appropriate amount of 5 to 20 parts by weight 0/0.
- the repeating unit (or (co) polymer) of the polyurethane poly since the repeating unit (or (co) polymer) of the polyurethane poly has a value of OHV 3 to 20, it may serve as an initiator in the polymerization process for forming the polylactic acid repeating unit. It could be confirmed.
- the final polylactic acid resins A to E are weight average molecular weights 100,000 to 400,000, molecular weight distribution 1.80 to 2.15, Tg 25 to 55 ° C and Tm 160 to 178 ° C, not only can be chipped but also alone It was confirmed that the film production is possible because the melt viscosity is appropriate at the film extrusion temperature of 200 ° C or more.
- the resin H is a content of the polyurethane poly, which is the soft segment, and the content of the repeating unit (or (co) polymer) is less than 5% by weight, and the glass transition temperature of the polylactic acid resin is higher than 55 ° C. It was confirmed that it is obtained.
- the resin J had a significantly higher content and amount of polyurethane polyol repeating units (or (co) polymers) in excess of 20% by weight, so that the weight average molecular weight of the finally produced polylactic acid resin was less than 100,000, The glass transition temperature was found to be less than 25 ° C.
- the resin L attempts to prepare a polylactic acid resin by using polyethylene glycol having a molecular weight of 8,000 as an initiator in the ring-opening polymerization of L-lactide without urethane reaction.
- the OHV of the initiator was high, and a polylactic acid resin having a desired weight average molecular weight could not be obtained.
- the resin L had a Tg of only 15 ° C., a low polymerization conversion, and a film having a low melt viscosity at a film extrusion temperature of 200 ° C. or higher, so that film production alone was impossible.
- resin M is a polylactic acid prepared by ring-opening polymerization of L-lactide using a small amount of 1-dodecan as an initiator according to a general polylactic acid resin production method without introducing a softening component (polyurethane poly repeating unit) in the resin. It corresponds to resin.
- a softening component polyurethane poly repeating unit
- resin 0 uses a polyurethane formed from a polyester polyol repeating unit, such as PBSA, not a polyether poly, as the softening component in the resin, while the ring opening polymerization catalyst, the transesterification catalyst and / or the ester amide exchange catalyst In the presence of, a polylactic acid copolymer obtained by copolymerizing the polyurethane and lactide. In such a polylactic acid copolymer, the ester and / or ester amide exchange reaction occurs, and the polyurethane is randomly introduced into a small segment size to have a form copolymerized with the polylactic acid repeating unit.
- This resin 0 has a molecular weight It is confirmed that the distribution is 2.85 wide, Tg is too low compared to the present invention, and Tm is also relatively low.
- the resins P and R are added to the polyether polyol repeating unit first to polymerize the lactide to prepare a prepolymer copolymerized with the polyether polyol repeating unit and the polylactic acid repeating unit, and then chain extension of the prepolymer with a diisocyanate compound. It corresponds to a copolymer (resin P) and a branched copolymer (resin R) in which the prepolymers are reacted with at least trifunctional isocyanate compounds.
- These resins P and R are found to have a wide molecular weight distribution of 2.50 and 3.91, too low Tg compared to the present invention, and a relatively low Tm.
- Examples 1 to 5 has a content of the softening component (polyurethane poly repeating unit) in the polylactic acid resin is 5 to 20% by weight, weight average molecular weight 100,000 to 400,000, molecular weight distribution 1.80 to 2.15 , Tg is prepared using the polylactic acid resin of the present invention having physical properties such as 25 to 55 ° C and Tm 160 to 178 ° C.
- Example 6 was also produced using a polylactic acid resin (resin E) and a general polylactic acid resin (resin M) which fall within the scope of the present invention.
- the films of Examples 1 to 6 all had excellent mechanical properties such that the total initial tensile strength in the length and width directions were 20 kgf / mnf or more, and the total Young's modulus in the length and width directions was 350 to 750 kgf / nmf. It was confirmed that the degree of stiffness was also displayed by maintaining the appropriate range while showing flexibility. And the weight change rate after 1 hour treatment at 100 ° C hot air oven is less than 3wt%, haze is 5% or less, light transmittance is 90% or more, and also excellent blocking resistance, such as transparency, haze, It was confirmed that various physical properties such as blocking property and heat resistance were excellent.
- the film of Comparative Example 1 made of a general polylactic acid resin M has a high flexibility because the total length and width Young's modulus exceed 750 kgf / mrf. It was confirmed that it could not be used as a packaging film because it could not be layered.
- the difference in melt viscosity between the two resins is so large that the extrusion state is poor, and the problem that the wave pattern occurs in the final film Occurred.
- the pin appearance occurred on the film, resulting in poor film appearance.
- the Tg of the resin L was too low to cause problems such as blocking resistance, and initial tensile strength and light transmittance were also poor.
- Comparative Examples 4 and 5 a poly (1,3-propanediol) having a number average molecular weight of 2,400 and 1,4 having a number average molecular weight of 11,000, respectively, were used as a plasticizer component without using a polyurethane polyol repeating unit that is a resin-softening component.
- -An aliphatic polyester polyol made of butanediol and a condensate of succinic acid and adipic acid is a film compounded by simply compounding mixing into resin M.
- the films of Comparative Examples 4 and 5 had a high haze of the film because the degree of dispersion of the plasticizer component in the resin was not perfect, and a phenomenon in which the plasticizer component bleeded out on the surface of the film was found after a lapse of time.
- Comparative Example 2 is a resin having a relatively high glass transition temperature due to the low content of the soft segment. For this reason, it was confirmed that the film obtained from the resin H was not flexible enough because the total Young's modulus in the length and width directions exceeded 750 kgf / mnf, and thus it was difficult to be used as a packaging film.
- the film of Comparative Example 6 is made of a copolymer in which a polyester polyol repeating unit is introduced and a low glass transition temperature does not satisfy the properties of the present invention.
- Such films showed relatively good flexibility as the softening component polyurethane was randomly introduced into a small segment size, but as polylactic acid repeat units were also introduced into a relatively small segment size, poor heat resistance due to low Tg and Tm, etc. It was confirmed that filming was difficult due to blocking problems. In addition, it was confirmed that the film had high haze value and low transparency due to the low compatibility of the polyester poly and the polylactic acid used for the formation of the softening component, and it was confirmed by the ester and / or ester amide exchange reaction during the preparation of the resin. Wide molecular weight distribution results in uneven melt characteristics and film extrusion It has been confirmed that it causes poor and deteriorated mechanical properties.
- the films of Comparative Examples 7 and 8 include a resin obtained by urethane reaction of a prepolymer obtained by addition polymerization of a polyether polylactic acid to a diisocyanate or a trifunctional or higher isocyanate compound, and the resin is also structurally a polylactic acid resin of the present invention. It does not meet the properties or the film properties. These films were found to exhibit non-uniform melt viscosity and poor mechanical properties. In addition, as the blocking characteristics of the hard and soft segments in the resin decreased and exhibited low Tm and Tg, the film exhibited poor heat resistance and difficulty in filming due to blocking problems.
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Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
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EP11857120.7A EP2669320B1 (en) | 2011-01-25 | 2011-11-02 | Polylactic acid resin film |
CA2824959A CA2824959C (en) | 2011-01-25 | 2011-11-02 | Polylactic acid resin film |
US13/981,135 US9567429B2 (en) | 2011-01-25 | 2011-11-02 | Polylactic acid resin film |
CN201180065970.4A CN103328547B (zh) | 2011-01-25 | 2011-11-02 | 聚乳酸树脂膜 |
BR112013019008A BR112013019008B1 (pt) | 2011-01-25 | 2011-11-02 | película de resina de ácido poliláctico |
MX2013008564A MX351694B (es) | 2011-01-25 | 2011-11-02 | Película de resina de ácido poliláctico. |
AU2011356807A AU2011356807B2 (en) | 2011-01-25 | 2011-11-02 | Polylactic acid resin film |
JP2013550380A JP5960725B2 (ja) | 2011-01-25 | 2011-11-02 | ポリ乳酸樹脂フィルムおよびその製造方法 |
ES11857120T ES2748522T3 (es) | 2011-01-25 | 2011-11-02 | Película de resina de ácido poliláctico |
HK13112403.1A HK1185094A1 (zh) | 2011-01-25 | 2013-11-04 | 聚乳酸樹脂膜 |
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KR10-2011-0007365 | 2011-01-25 | ||
KR10-2011-0007367 | 2011-01-25 | ||
KR1020110007366A KR101804430B1 (ko) | 2011-01-25 | 2011-01-25 | 폴리유산 수지 필름 |
KR1020110007367A KR101804431B1 (ko) | 2011-01-25 | 2011-01-25 | 폴리유산 수지 필름 |
KR10-2011-0007366 | 2011-01-25 | ||
KR1020110007365A KR101804429B1 (ko) | 2011-01-25 | 2011-01-25 | 폴리유산 수지 필름 |
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US (1) | US9567429B2 (ko) |
EP (1) | EP2669320B1 (ko) |
JP (1) | JP5960725B2 (ko) |
CN (1) | CN103328547B (ko) |
AU (1) | AU2011356807B2 (ko) |
BR (1) | BR112013019008B1 (ko) |
CA (1) | CA2824959C (ko) |
ES (1) | ES2748522T3 (ko) |
HK (1) | HK1185094A1 (ko) |
MX (1) | MX351694B (ko) |
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ES2962147T3 (es) * | 2010-11-08 | 2024-03-15 | Sk Chemicals Co Ltd | Resina de ácido poliláctico, procedimiento de preparación de la misma, y película de embalaje que comprende la misma |
CN104937030B9 (zh) * | 2013-01-11 | 2018-04-20 | 株式会社吴羽 | 聚‑l‑乳酸固化挤出成型物及其制造方法和应用 |
KR102111761B1 (ko) * | 2013-11-22 | 2020-05-15 | 에스케이케미칼 주식회사 | 폴리유산/아크릴로니트릴-부타디엔-스타이렌 공중합체 얼로이 수지 조성물 |
WO2015156638A1 (ko) * | 2014-04-11 | 2015-10-15 | 코오롱인더스트리 주식회사 | 폴리에스테르 필름, 이의 제조방법 및 이를 이용한 폴리에스테르 성형품, 이의 제조방법 |
KR102130039B1 (ko) * | 2014-06-05 | 2020-07-03 | 에스케이케미칼 주식회사 | 열 접착성 유연 폴리유산 수지 조성물 |
KR102456006B1 (ko) * | 2016-03-24 | 2022-10-18 | 에스케이케미칼 주식회사 | 폴리유산 수지 조성물 및 이를 포함한 성형용품 |
CN114940749B (zh) * | 2022-07-05 | 2023-12-26 | 普立思生物科技有限公司 | 一种淋膜聚乳酸树脂的合成工艺 |
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2011
- 2011-11-02 WO PCT/KR2011/008308 patent/WO2012102463A1/ko active Application Filing
- 2011-11-02 US US13/981,135 patent/US9567429B2/en active Active
- 2011-11-02 ES ES11857120T patent/ES2748522T3/es active Active
- 2011-11-02 JP JP2013550380A patent/JP5960725B2/ja active Active
- 2011-11-02 EP EP11857120.7A patent/EP2669320B1/en active Active
- 2011-11-02 CA CA2824959A patent/CA2824959C/en active Active
- 2011-11-02 MX MX2013008564A patent/MX351694B/es active IP Right Grant
- 2011-11-02 BR BR112013019008A patent/BR112013019008B1/pt active IP Right Grant
- 2011-11-02 AU AU2011356807A patent/AU2011356807B2/en active Active
- 2011-11-02 CN CN201180065970.4A patent/CN103328547B/zh active Active
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2013
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JP2015532329A (ja) * | 2012-12-04 | 2015-11-09 | エルジー・ケム・リミテッド | 延伸フィルム |
Also Published As
Publication number | Publication date |
---|---|
BR112013019008A2 (pt) | 2016-10-04 |
MX351694B (es) | 2017-10-24 |
CN103328547A (zh) | 2013-09-25 |
EP2669320A1 (en) | 2013-12-04 |
EP2669320B1 (en) | 2019-07-10 |
US9567429B2 (en) | 2017-02-14 |
JP5960725B2 (ja) | 2016-08-02 |
MX2013008564A (es) | 2013-08-21 |
AU2011356807A2 (en) | 2013-08-22 |
US20140037931A1 (en) | 2014-02-06 |
BR112013019008B1 (pt) | 2020-04-07 |
CA2824959A1 (en) | 2012-08-02 |
AU2011356807A1 (en) | 2013-08-15 |
ES2748522T3 (es) | 2020-03-17 |
CN103328547B (zh) | 2016-03-09 |
EP2669320A4 (en) | 2017-07-05 |
HK1185094A1 (zh) | 2014-02-07 |
AU2011356807B2 (en) | 2015-11-05 |
CA2824959C (en) | 2018-06-26 |
JP2014507524A (ja) | 2014-03-27 |
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