WO2013180468A1 - 폴리유산 수지 및 이를 포함하는 포장용 필름 - Google Patents
폴리유산 수지 및 이를 포함하는 포장용 필름 Download PDFInfo
- Publication number
- WO2013180468A1 WO2013180468A1 PCT/KR2013/004716 KR2013004716W WO2013180468A1 WO 2013180468 A1 WO2013180468 A1 WO 2013180468A1 KR 2013004716 W KR2013004716 W KR 2013004716W WO 2013180468 A1 WO2013180468 A1 WO 2013180468A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polylactic acid
- acid resin
- repeating unit
- weight
- film
- Prior art date
Links
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
- 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
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- 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
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/02—Wrappers or flexible covers
-
- 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
-
- 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
- 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
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
-
- 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
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
- C08G18/8022—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with polyols having at least three hydroxy groups
- C08G18/8029—Masked aromatic polyisocyanates
-
- 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
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
-
- 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
-
- 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
- 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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
Definitions
- the present invention relates to a polylactic acid resin and a packaging film comprising the same. More specifically, the present invention may be usefully used as a packaging material by showing physical properties such as excellent flexibility and heat resistance, and relates to a polylactic acid resin having an environmentally friendly property and a packaging film including the same.
- 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 soft polyvinyl chloride
- such crude oil-based resins do not have biodegradability, and thus, there is a problem of causing environmental pollution such as discharging large amounts of carbon dioxide, which is a global warming gas, when disposed.
- biomass-based resins typically polylactic acid resins
- Biomass-based resins such as polylactic acid resins are known to exhibit biodegradability and have environmentally friendly properties.
- polylactic acid resins are inferior in heat resistance or mechanical properties compared to crude oil-based resins, it is true that the polylactic acid resins have limitations in fields or applications to which they can be applied.
- attempts have been made to apply the 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-based or aliphatic polyester-based polyol to the polylactic acid resin is proposed. It has been.
- the present invention can be usefully used as a packaging material by showing various physical properties such as excellent flexibility and heat resistance, and to provide a polylactic acid resin having desirable biodegradability and environmentally friendly properties.
- the present invention also provides a packaging film containing the polylactic acid resin.
- the present invention provides a hard segment including a polylactic acid repeating unit represented by Formula 1 below; And a soft segment comprising a polyether-based fleet of Formula 2, repeating units of polyurethane poly, in which repeating units are linearly linked through a urethane bond. It provides a polylactic acid resin, wherein the organic carbon content (% C bio) of the bio sheet origin, defined by the following formula 1 is 60 weight 0 /.
- % C bio (14 C isotope ratio by weight of the 12 C isotope of carbon atoms of the biomass origin standard) (poly (lactic acid) 14 C isotope ratio by weight of the 12 C isotope of carbon atoms of the resin)
- 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 present invention provides a packaging film containing the polylactic acid resin.
- a polylactic acid resin and a packaging film including the same according to a specific embodiment of the present invention will be described.
- the hard segment comprising a polylactic acid repeating unit of the formula (1); And a soft segment containing a polyether polyol of Formula 2 including a polyurethane polyol repeating unit in which repeating units are linearly connected through a urethane bond, and containing an organic carbon content of biomass origin defined by Equation 1 below (A polylactic acid resin having a% C bio) of at least 60 weight 0 / ° is provided:
- % C Bio (poly 14 C isotope ratio by weight of the 12 C isotope of carbon atoms of the lactic acid resin) / (14 C isotope ratio by weight of the bio-12 C isotope of carbon atoms of the mass origin standard)
- 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.
- Such a polylactic acid resin basically includes a polylactic acid repeating unit represented by Chemical Formula 1 as a hard segment.
- the polylactic acid resin includes a polylactic acid repeating unit as a hard segment, and a polyurethane polyol repeating unit as a soft segment, thereby greatly improving flexibility (eg, measured in the length and width directions).
- flexibility eg, measured in the length and width directions.
- the soft segment is introduced into the polylactic acid resin in a combined form with the hard segment, the soft segment for improved flexibility is less likely to bleed out or exhibit low stability, and the film containing the polylactic acid resin may be reduced. It is also confirmed that there is a possibility that the haze of the back will be increased or the transparency will decrease.
- the polylactic acid resin of one embodiment enables the provision of films exhibiting excellent transparency and low haze values with improved flexibility.
- the polylactic acid resin may exhibit the above-described effects without significantly increasing the content of the soft segment for improving flexibility.
- the polylactic acid resin of one embodiment may exhibit the biodegradability and eco-friendly characteristics unique to the biomass-based resin by including the polylactic acid repeating unit as a hard segment.
- the polylactic acid resin does not need to increase the content of the soft segment so much as to improve flexibility. Relatively high content of biomass-based resins, such as hard segments derived from polylactic acid resins.
- the polylactic acid repeating unit of the hard segment may be derived from the biomass
- the polyether polyol repeating unit of the soft segment may also be derived from the biomass.
- Repeating units of such polyether-based poly for example, a polyether-based poly derived from biomass can be obtained from a resin.
- Such biomass may be of any plant or animal resource, for example, a plant resource such as corn, sugar cane, or tapioca.
- the polylactic acid resin has an organic carbon content of the biomass origin (% C bio) defined by the formula (1) about 60 weight 0 /. Or more, or about 80 weight 0/0 or greater, or about 90 weight 0 / greater than or equal to 0 and the black can be about 95 parts by weight 0/0 above.
- the measuring method of the organic carbon content rate (% 0 bio) of a biomass origin by the said formula can be based on the method as described in ASTM D6866 standard, for example. It is as follows when the technical meaning of this organic carbon content rate (% C bio) and a measuring method are revealed more concretely.
- organic materials such as resins derived from biomass (biological resources) are known to contain isotopes 14C . More specifically, all of the organic substance taken from a living organism such as an animal or plant is 12 C (from about 98.892 wt. 0 /.), 13 C (from about 1.108 wt. 0 /.) And 14 C (about 10 ⁇ 1.2 ⁇ 10 a carbon atom It is known to contain three kinds of isotopes with a weight of 0 /.) And the ratio of each isotope is also kept constant. This is equal to the ratio of each isotope in the atmosphere, and this isotope ratio remains constant because living organisms continue to exchange carbon atoms with the external environment as they continue their metabolism.
- 14 C is a radioisotope, and its content may decrease with time (t) according to Equation 2 below. [Equation 2]
- the organic material such as the resin derived from the fossil raw material contains 14 C isotope at 0.2% or less of the initial content (atomic number) when estimated according to Equation 2, and does not substantially contain 14 C isotope. Do not.
- the denominator may be a weight ratio of 14 C / 12 C isotope derived from biomass, for example, about 1.2 ⁇ 10 12 , the molecule is a resin to be measured in one embodiment It may be in the weight ratio of 14 c / 12 c contained in.
- carbon atoms derived from biomass maintain an isotope weight ratio of about 1.2 ⁇ 10 ⁇ 12, whereas carbon atoms derived from fossil fuel have such an isotopic weight ratio of substantially zero
- the organic carbon content rate (% C bio) of the biomass origin among all the carbon atoms included in the polylactic acid resin of one embodiment can be measured.
- each carbon isotope and their content ratio are described in the ASTM D6866-06 standard (standard test method for determining the biobased content of natural materials using radiocarbon and isotope ratio mass spectrometry analysis). It can be measured according to one of three methods.
- the carbon atoms contained in the resin to be measured are in the form of graphite or carbon dioxide gas.
- two isotopes may be separated together with an accelerator for separating 14 c ions from 12 c ions together with the mass spectrometer and the content and content ratio of each isotope may be measured by a mass spectrometer.
- the content and content ratio of each isotope may be determined by using liquid scintillation spectroscopy that is apparent to those skilled in the art, and thus the measurement value of Equation 1 may be derived.
- the polylactic acid resin of one embodiment includes a resin and carbon derived from biomass in most content.
- the polylactic acid resin may properly exhibit unique biodegradability.
- the polylactic acid resin of one embodiment that satisfies such a high organic carbon content may exhibit environmentally friendly characteristics described below.
- Biochemical products such as polylactic acid resins are biodegradable, with low carbon dioxide emissions, up to 108% less carbon dioxide emissions than current petrochemical products, and up to 50% energy savings for resin production. can do.
- the production of bioplastics using biomass materials is expected to reduce carbon dioxide emissions calculated by ISO 14000 compliant Life Cycle Analysis (LCA) by up to 70% compared to fossil materials.
- polylactic acid resin a kind of bioplastics
- polylactic acid resin previously known, there was a limitation in application due to low flexibility, and when including other components such as a plasticizer to solve this problem, there was a problem in that the advantages as the bioplastic mentioned above were greatly reduced.
- the polylactic acid resin of one embodiment satisfies the advantages as a bioplastic as it satisfies the high organic carbon content (% c bio) mentioned above. While being able to solve the problems, such as low flexibility of the polylactic acid resin, it can be applied to more various fields.
- the polylactic acid resin of one embodiment which satisfies such a high organic carbon content (% C bio) can be obtained by a production method described below, for example, a method using a polyether polyol polymer derived from biomass. .
- the polylactic acid resin of one embodiment may exhibit environmentally friendly characteristics that greatly enjoy the carbon dioxide generation and energy consumption by taking advantage of the bioplastics.
- the polylactic acid resin of one embodiment may exhibit excellent biodegradability and environmentally friendly characteristics unique to the polylactic acid resin, while exhibiting excellent flexibility and transparency with a minimum content of the soft segment.
- Eco-friendly properties of such polylactic acid resin can be measured through a life cycle assessment, such as a packaging film containing the same.
- the polylactic acid resin of one embodiment when evaluated by ISO 14000 compliant LCA (Life Cycle Assessment, Life Cycle Assessment), CO 2 generated during the production of 1kg polylactic acid resin The amount of is less than about 1.0kg, black is about 0.8kg or less, or less than about 0. or less, or about 0.6 to 0.7kg can exhibit an environmentally friendly characteristic that is very small.
- the polylactic acid resin of one embodiment while maintaining the excellent biodegradability while solving the problem of low flexibility of the previous polylactic acid resin, an environmentally friendly polylactic acid resin film that can be very preferably applied to food packaging films, etc. It can be provided.
- the polylactic acid resin is the first resin that can solve the problem of low flexibility through the introduction of soft segments, while containing the resin component of the biomass origin in most of the content to exhibit the eco-friendly properties of the polylactic acid resin Can be
- the content of the one embodiment poly (lactic acid) 14 C isotope of carbon atoms of the resin is about 10 weight 0.7X1 coming 0 /. 1.2X1CT to 10 parts by weight 0/0, or from about 10 weight 0.72X1 0/0 to 1.2 ⁇ 10 , it may be a 10 wt. 0 /., or about 1.0, 10 parts by weight ⁇ 10 0/0 to 10 parts by weight 0 1.2 X10 /., or from about 10 weight 1.08X10 0/0 to 10 wt 1.2X10- ./.
- Polylactic acid resins having such 14 C isotope content are most or substantially all resins.
- carbon may be derived from biomass and may exhibit better biodegradability and environmentally friendly properties.
- a hard segment derived from biomass is an organic carbon content of the biomass eu's origin defined by the formula (1) described above (% C bio) from about 60 parts by weight 0 /. Or more, or about 80 weight 0 /. or more, or about 90 increased 0 /. or more, or about 95 weight 0 /. above, or may be from about 95 to 100 parts by weight 0/0, and a soft segment derived from the biomass, the formula 1
- the organic carbon content rate (% Cbio) of biomass origin is defined as about 70% by weight or more, and black may be about 75 to 95% by weight 0 /.
- a urethane bond connecting each polyether polyol repeating unit may be derived from a diisocyanate compound derived from a fossil fuel.
- the polylactic acid resin of one embodiment is substantially all components except the diisocyanate compound used to connect the polyether-based poly repeating units, so that the resin component of biomass origin, Despite the introduction of soft segments, it can exhibit the eco-friendly characteristics peculiar to polylactic acid resin. Moreover, due to the structural characteristics described in more detail below, reducing the content of soft segments containing components of fossil fuel origin can further enhance the flexibility of the polylactic acid resin, and thus, these environmentally friendly characteristics are more prominent. Can be.
- polylactic acid resin is an organic carbon content of the biomass origin (% C bio) is about 60% by weight or more, or about 80 weight 0 /. Or more, or about 90 wt.
- % C bio organic carbon content of the biomass origin
- the criteria for obtaining the "Biomass Pla" certification of JBPA, a certification based on the standard ASTM D6866, can be stratified.
- the polylactic acid resin can be properly attached to the "Biomass-based" label of JORA.
- the polylactic acid resin has a glass transition temperature (Tg) of about 25 to 55 ° C., preferably a glass transition temperature (Tg) of about 30 to 55 ° C.
- the polylactic acid resin reacts a polyether polyol repeating unit with a diisocyanate compound so that a plurality of polyether polyol repeating units are linearly connected with a urethane bond.
- a polyurethane poly repeating unit it may include a block copolymer copolymerized with a polylactic acid repeating unit.
- the urethane bond may be formed by reacting the polyether poly with a hydroxyl group at each terminal of the repeating units and a diisocyanate compound.
- the polylactic acid resin includes the block copolymer thus obtained, it is possible to meet the glass transition temperature (Tg) range of about 25 to 55 ° C, which is optimized not only in terms of flexibility of the film but also in terms of other physical properties such as mechanical properties. Turned out.
- Tg glass transition temperature
- the flexibility or stiffness of the film containing the polylactic acid resin can be optimized and used very preferably as a packaging film. 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 properties, and heat resistance may be caused during packaging using the film. Or blocking resistance or the like may be poor, and therefore, application to a packaging film may be inappropriate. On the contrary, when the glass transition temperature is too high, the film may have low flexibility and too high stiffness, so that the film may not be easily folded and its marks may be lost or the adhesion to the target product may be poor when packaged. In addition, when the film is packaged, the noise is severely generated, there may be a limit to the application to the packaging film.
- the polylactic acid resin according to one embodiment enables the provision of a film with optimized flexibility as a packaging material, as the glass transition temperature is optimized and has the above-described structural properties.
- a film is also excellent in other physical properties such as mechanical properties, heat resistance, blocking resistance and transparency, it can be very preferably used as a packaging material for various applications.
- the polylactic acid repeating unit of Formula 1 included in the hard segment may refer to a polylactic acid homopolymer (Appelr ymer) 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 directly dehydrated L-lactic acid or D-lactic acid.
- the polylactic acid repeating unit of higher polymerization degree can be obtained through 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 preferred to prepare by the method of homopolymerization using either L-lactide or D-lactide.
- the polylactic acid repeating unit may 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 not this, the melting temperature (Tm) of the polylactic acid resin ) Can be lowered.
- Polyurethane polyol repeating units can be followed. By including the polyurethane poly repeating unit as a soft segment, the flexibility of the film containing the polylactic acid resin can be greatly improved.
- the repeating unit of the polyurethane poly enables the provision of 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 and poor film extrusion. Physical properties, heat resistance and blocking resistance were also insufficient.
- Polylactic acid copolymers in the form of chain extension by urethane reactions have also been previously known.
- 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.
- the film still had problems such as poor molecular weight distribution and poor melting characteristics, resulting in poor film extrusion.
- the polylactic acid resin of one embodiment including a polyurethane polyol repeating unit and a polylactic acid repeating unit linearly linked to a plurality of polyether poly repeating units through a urethane bond provides excellent flexibility by repeating the polyurethane poly. While providing a film to be shown, it exhibits an optimized glass transition temperature, has a low molecular weight distribution and includes polylactic acid repeat units in large segment sizes, allowing the film to exhibit excellent mechanical properties, heat resistance and blocking resistance, etc. . Accordingly, it has been found that the polylactic acid resin of the above embodiment solves all the problems of the copolymers known in the art, thereby providing a film having excellent overall flexibility and having greatly improved flexibility.
- the polyether-based poly repeating unit and the diisocyanate compound react with each other such that the molar ratio of the terminal hydroxyl groups of the polyether-based polyol repeating units: the isocyanate group of the compound of the diisocyanate compound is about 1: 0.50 to 1: 0.99.
- Polyol repeat units can be formed.
- the reaction molar ratio of the terminal hydroxy group: isocyanate group of the diisocyanate compound of the polyether polyol repeating units may be about 1: 0.60 to 1: 0.90, more preferably about 1: 0.70 to 1: 0.85. .
- the polyurethane polyol repeating unit refers to a polymer formed by linearly connecting the polyether polyol repeating units via a urethane bond or a repeating unit forming the same. It may have a hydroxyl group at the terminal. Accordingly, the polyurethane fleece repeating unit may act as an initiator in the polymerization process for forming the polylactic acid repeating unit. However, when the reaction molar ratio of the hydroxy group: isocyanate group is excessively higher than about 0.99, the number of terminal hydroxy groups of the repeating unit is insufficient (OHV ⁇ 3), and 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 or tetrahydrofuran dung
- examples of the polyether polyol repeating unit obtained therefrom include repeating units of polyethylene glycol (PEG); Repeating units of poly (1,2-propylene glycol); Repeating units of poly (1,3-propanedi); Repeating units of polytetramethylene glycol; Repeating units of polybutylene glycol; Repeating units of poly, which is a copolymer of propylene oxide and tetrahydrofuran; Repeating units of polyols which are copolymers of ethylene oxide and tetrahydrofuran; Or the repeating unit of poly which is a copolymer of ethylene oxide and a prop
- the repeating unit of poly (1,3-propanedi) or polytetramethylene glycol is used as the repeating unit. It is preferable to use a repeating unit, and such a polyether polyol repeating unit may have a number average molecular weight of about 400 to 9000, preferably 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 and 2,4-luene Diisocyanate, 2,6-ruluene diisocyanate, 1,3-xylene diisocyanate, 1,4- xylene diisocyanate, 1,5-naphthalenedi isocyanate, m-phenylenedi isocyanate, P-phenylenedi isocyanate 3,3 ' -Dimethyl -4,4'- diphenylmethane diisocyanate, 4,4'- bisphenylene diisocyanate, nucleated methylene diisocyanate, isophorone diisocyanate or hydrogenated diphenylmethane diisocyanate, etc.
- diisocyanate compounds can be used without particular limitation. However, it is preferable to use 1, 6-nuxa methylene diisocyanate from a viewpoint of the softness
- the polylactic acid resin according to an embodiment of the present invention may include a block copolymer copolymerized with the hard segment and the soft segment described above. More specifically, the block copolymer may have a structure in which the polylactic acid repeating unit of the hard segment is combined with the repeating unit of the polyurethane poly of the soft segment, and the terminal carboxyl group of the polylactic acid repeating unit is the polyurethane polyol repeating unit. The terminal hydroxyl group of may be connected by an ester bond.
- the chemical structure of such block copolymers can be represented by the following general formula:
- E represents a polyether polyol repeating unit
- U represents a urethane bond and Ester represents an ester bond.
- the film formed of the polylactic acid resin can be prevented from bleeding out of the polyurethane polyol repeating unit for providing flexibility. It can be excellent in various physical properties such as transparency, mechanical properties, heat resistance or blocking resistance.
- 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 and blocking resistance of the film are optimized. It is possible to further improve the resistance and heat resistance.
- the polylactic acid repeating units included in the polylactic acid resin do not have to take the form of a block copolymer combined with the polyurethane polyol repeating unit, and at least some of the polylactic acid repeating units repeat the polyurethane polyol. It may also take the form of a polylactic acid homopolymer without being bound to a unit.
- 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 block co-polymer described above, and, optionally, if the polylactic acid homopolymer is included, the sum of the weight with such a single polymer), 65 to of the hard segment described above and 95 parts by weight 0/0, may comprise 5 to 35 increase 0 /. of the soft segment, and preferably from about 80 to 95 increased 0 /., and about 5 to 20 parts by weight 0/0 of the soft segment the hard segment , it is possible to more preferably from about 85 to 90 parts by weight of the hard segment ./., and about 10 of the soft segment is increased to 15 0 /.
- the content of the soft segment is too 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 may be lowered, so that slipping, handling or shape retention characteristics, blocking resistance, and the like may be degraded in packaging processing using a film.
- the content of the soft segment is too low, there is a limit to improving the flexibility of the holly lactic acid resin and the film.
- the glass transition temperature of the polylactic acid resin may be excessively high, thereby reducing the flexibility of the film, 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 an antioxidant to prevent the soft segment or the like from being oxidized or pyrolyzed in the manufacturing process.
- examples of the antioxidants include Hindered phenol antioxidants, amine antioxidants, thio antioxidants, and phosphite antioxidants. The types 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, UV stabilizers, anti-colorants, matte agents, deodorants, flame retardants, weathering agents, antistatic agents, mold release agents, antioxidants, etc.
- grains, may also be included further.
- 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 acid ester plasticizers such as acetyl ricinolic acid methyl and stearic acid mil; Polyhydric alcohol ester plasticizers such as
- Inorganic pigments such as carbon black, titanium oxide, zinc oxide, iron oxide; Organic pigments such as cyanine-based, phosphorus-based, quinone-based, lerione-based, isoindolinone-based and thio-indigo-based;
- 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.
- the polylactic acid resin described above may have a number average molecular weight of about 50,000 to 200,000, and 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 about 10 000 to 320,000.
- Such molecular weight may affect the processability and mechanical properties of the polylactic acid resin described above.
- the molecular weight is too small, when melt processing by a method such as extrusion, the melt viscosity is too low, the workability to the film, etc. may be inferior, even if the processing to the film is possible mechanical strength and the like Physical properties may be reduced.
- the molecular weight is too large, the melt viscosity during the melt processing is too high can significantly reduce the productivity to the film.
- the polylactic acid resin for example, the block copolymer contained therein has a molecular weight distribution (Mw / Mn) defined as the 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 15.
- Mw / Mn molecular weight distribution
- the polylactic acid resin exhibits such a narrow molecular weight distribution, it exhibits proper melt viscosity and melt characteristics when melt processing by extrusion or the like, and thus may exhibit excellent film extrusion state and processability.
- the film containing the polylactic acid resin may exhibit excellent mechanical properties such as strength.
- the polylactic acid resin may have a melting temperature (Tm) of about 160 to 178 ° C., preferably about 165 to 175 ° C. When the melting temperature is too low, the heat resistance of the film containing the polylactic acid resin may be lowered.
- the polylactic acid resin described above is optimized in glass transition temperature and the like with such a melting temperature, thereby providing a packaging film having excellent melt processability and excellent overall properties including heat resistance with optimized flexibility.
- the method for producing a polylactic acid resin may include ring-opening and adding a monomer including at least one alkylene oxide to form a polymer having a polyether poly of Formula 2 having a repeating unit; Urethane reacting the polymer with a diisocyanate compound in the presence of a urethane reaction catalyst to form a polymer having a polyurethane polyol repeating unit in which repeating units of Formula 2 are linearly connected through a urethane bond; And a polymer having the polyurethane polyol repeating unit In the presence, it may include the step of polycondensation of lactic acid or ring-opening polymerization of lactide, to form a polylactic acid repeating unit of the formula (1).
- the lactic acid or lactide and the polylactic acid repeat unit formed therefrom may be derived from biomass, and the alkylene oxide and the polyether
- the polylactic acid repeating unit of Formula 1 is included as a hard segment, and together, a polylactic acid resin including a predetermined polyurethane poly repeating unit as a soft segment may be prepared.
- a polyether polyol polymer having a repeating unit of Formula 2 causes a urethane reaction with a diisocyanate compound, and a plurality of repeating units of the Formula 2 may form a polyurethane poly connected linearly through a urethane bond.
- Polymers having repeating units can be formed.
- the hydroxyl groups at the polymer end act as an initiator, and as a result of the polycondensation of the lactic acid or the ring-opening polymerization of the lactide, the polylactic acid repeating unit and the polyurethane poly repeating unit are hard segments and Polylactic acid resin including a soft segment may be prepared.
- the polylactic acid resin produced by this method can meet the physical properties of the embodiment, such as the above-described glass transition temperature range, and as a result it is possible to provide a packaging film exhibiting better overall physical properties.
- the polylactic acid resin of the above embodiment can be continuously produced with high productivity.
- the polylactic acid resin produced by the above-described method is a polyether poly for the formation of soft segments as well as hard segments, wherein the polymer is derived from biomass, and the organic carbon content rate (%) of biomass origin defined by Equation 1 bio-C) can be from about 60 weight 0/0 or more, or about 80 weight 0/0 or more, or about 90 weight 0/0 or more, or about 95 weight 0/0 above.
- polyether polyol is first condensed with a lactic acid or the like and then chain extended,
- the fossil fuel origin high content of polyester polyol repeating units such as due to occur is necessary to introduce other resins, above about 60 weight 0/0 or more, or about 80 wt.
- the amount of the polylactic acid resin, the molecular weight of the polyether-based polyol polymer, or the amount of the polymer having a repeating unit of the polyurethane poly to the content of the soft segment, the glass transition temperature, etc. It is a major factor that enables the polylactic acid resin to be produced.
- the optical purity of L-lactide or D-lactide, which is an isomer of lactide can be adjusted by, for example, about 98% or more, preferably about 99% or more, and most preferably about 99.5% or more.
- Polylactic acid resin that satisfies the glass transition temperature, the melting temperature and the like can be produced.
- At least one monomer such as alkylene oxide is ring-opened (co) polymerized to form a (co) polymer having a polyether polyol repeating unit, which is a method for preparing a polyether-based polyol (co) polymer.
- the (co) polymer, the diisocyanate compound and the urethane reaction catalyst having the polyether polyol repeating unit are layered in a reaction vessel, heated and stirred to carry out a urethane reaction.
- two isocyanate groups of the diisocyanate compound and terminal hydroxyl groups of the (co) polymer To form a urethane bond.
- a (co) polymer having a polyurethane polyol repeating unit in a form in which polyether polyol repeating units are linearly linked through the urethane bond can be formed, which is included as the 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 alkylene oxide and the polyether-based polyol repeating units obtained therefrom are derived from biomass such as plant resources, and thus the polyurethane polyol (co) polymer may contain an organic carbon content rate (% Cbio) of biomass origin. ) Is about 70% by weight or more, which is quite high.
- the urethane reaction can be carried out in the presence of a conventional tin-based catalyst, for example, Stannous Octoate, Dibutyltin Dilaurate, Dioctyltin Dilaurate.
- a conventional tin-based catalyst for example, Stannous Octoate, Dibutyltin Dilaurate, Dioctyltin Dilaurate.
- the urethane reaction can be carried out under the reaction conditions for the production of conventional polyurethane resin. For example, after adding a diisocyanate compound and a polyether poly (co) polymer under a nitrogen atmosphere, the urethane reaction catalyst is added thereto, and reaction is performed for 1 to 5 hours at a reaction temperature of 70 to 80 ° C. to repeat the polyurethane polyol repeating unit.
- the (co) polymer having can be prepared.
- lactic acid (D or L-lactic acid) derived from biomass is polycondensed or lactide (D or L-lactide derived from biomass).
- a polylactic acid resin in particular, a block copolymer contained therein according to an embodiment of the invention. That is, when such a polymerization reaction is performed, a polylactic acid repeating unit included as a hard segment is formed, thereby producing the polylactic acid resin, and at this time, the polyurethane poly repeating unit is bonded to at least a portion of the polylactic acid repeating unit.
- Block copolymers may be formed.
- the block copolymer may be formed while the carboxyl group at the end of the polylactic acid repeating unit is ester-bonded with the hydroxyl group at the end of the repeating polyurethane.
- a prepolymer prepared by combining a polyether polyol and a polylactic acid first is prepared and then these prepolymers are diisocyanate.
- Block copolymers of one embodiment exhibiting a different structure and glass transition temperature than known polylactic acid copolymers in the form of chain extension with compounds or known branched copolymers in which the prepolymers are reacted with trifunctional or higher isocyanate compounds. Can be formed.
- the block copolymer of such an embodiment 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 thus excellent mechanical properties and heat resistance can be exhibited.
- the above known copolymers have a structure in which polylactic acid repeating units having a small unit (molecular weight) have a structure in which polyether poly is alternately arranged at random with a repeating unit, and the like. It does not stir 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 alkaline earth metal, rare earth metal, transition metal, aluminum, germanium, tin or antimony. More specifically, such metal catalysts may be in the form of carboxylates, alkoxy degrees, halides, oxides or carbonates of these metals. Preferably, as the metal catalyst, tin octylate, titanium tetraisopropoxide, aluminum triisopropoxide, or the like can be used.
- antioxidants can be used together with such catalysts, and with the use of such antioxidants, polylactic acid resins with excellent yellowing and excellent appearance can be produced.
- the step of forming a polylactic acid repeating unit such as the lactide ring-opening polymerization reaction can be continuously performed in the same reactor in which the urethane reaction is progressed. That is, the polyether polyol polymer and the diisocyanate compound are urethane reacted to form a polymer having a polyurethane polyol repeating unit, and then a monomer such as lactide and a catalyst are continuously added to form a polylactic acid repeating unit. Can be.
- the polymer having a repeating unit of polyurethane poly acts as an initiator, the polylactic acid repeating unit and the polylactic acid resin containing the same can be continuously produced in high yield and high productivity.
- the polylactic acid resin described above may have a specific hard segment and soft segment.
- the biodegradability of the polylactic acid resin may be exhibited, while also providing improved flexibility.
- bleeding out of the soft segment for providing flexibility may be minimized, and the addition of the soft segment may 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 physical property such as a predetermined melting temperature, the film obtained therefrom may exhibit optimized flexibility and stiffness as a packaging material, Melt workability is also excellent, and blocking resistance and heat resistance are further improved. Therefore, such a polylactic acid resin can be very preferably applied to packaging materials such as packaging films.
- the polylactic acid resin has a high organic carbon content (% C bio) of biomass origin, which may exhibit excellent biodegradability and environmentally friendly characteristics, as described above.
- a packaging film comprising the polylactic acid resin described above. Since the packaging film includes the above-mentioned polylactic acid resin, it is not only excellent in mechanical properties, heat resistance, blocking resistance and transparency, but also may exhibit optimized flexibility and stiffness, and may exhibit biodegradability and eco-friendly properties. It can be very preferably used as an environmentally friendly packaging material in various fields.
- Such a packaging film may have various thicknesses according to each use, and may have a thickness of 5 to 500 mi.
- the packaging film is a temperature 2 (C, under a relative humidity of 65%, Instron 1123
- the total Young's modulus in the longitudinal and width directions was about 350 to 750 kgf / mnf, preferably about 450 to 650 kgf / mnf, more preferably about 500 to 600 It can be kgf / ⁇ 2 .
- the range of this Young's modulus sum can reflect the optimized flexibility and stiffness of the packaging film, and this flexibility and stiffness seems to be due to the polylactic acid resin satisfying the above-described structural properties, glass transition temperature and the like.
- the initial tensile strength of about 10 kgf / miif or more in the longitudinal direction and the width direction, preferably the initial tensile strength of about 12 kgf / mnf or more, more preferably For example, it may have an initial tensile strength of about 15 kgf / mnf or more and about 30 kgf / mnf or less. 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.
- the packaging film has a weight change rate of about 3 wt% or less when treated in a 100 ° C. hot air oven for 1 hour, preferably about 0.01 to 3.0 wt 0 / ⁇ More preferably, about 0.05 to I.Owt 0 /.
- a weight change rate of about 3 wt% or less when treated in a 100 ° C. hot air oven for 1 hour, preferably about 0.01 to 3.0 wt 0 / ⁇ More preferably, about 0.05 to I.Owt 0 /.
- Can be Such properties may reflect the excellent heat resistance and anti-bleed out property of the packaging film. If the weight change rate is about 3 wt% or more, the dimensional stability of the film becomes poor, which means that plasticizers, residual monomers, or additives bleed out, and these components may contaminate the package contents.
- the packaging film may have 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 too big or light If the transmittance is too low, the contents cannot be easily distinguished during film packaging, and the printed image is less likely to appear clearly when applying a multilayer film in which a printed layer is used.
- the above-mentioned packaging film may provide the properties required as a food packaging material such as heat sealing property, gas barrier property such as water vapor, oxygen or carbon dioxide, release property, printability, etc.
- a polymer having such properties may compound the compound into a film, or apply 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 to at least one surface of the packaging film.
- 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
- another film having a function such as polyolefin sealant or the like may be coextruded to produce a multilayer film. It may also be produced in the form of a multilayer film by other adhesive or lamination methods.
- the above-mentioned packaging film can be produced according to a conventional method.
- the polylactic acid resin may be formed in the form of a stretched film by applying an inflation method, a sequential biaxial stretching method, a simultaneous biaxial stretching method, or the like, and then heat-fix it.
- the stretched film forming step is melt-extruded the polylactic acid resin into a sheet by an extruder equipped with a T die, and the sheet-like molten extrudate is milled and solidified 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 about 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 final manufacturing film for packaging by heat setting which heat setting to ensure the strength and dimensional stability of the film
- the above-mentioned packaging film not only has excellent flexibility and transparency even after long-term storage, but also mechanical properties such as layer strength and anti-bleed out characteristics. And the like. Moreover, the biodegradability peculiar to a polylactic acid resin can be exhibited. Therefore, such a packaging film can be preferably applied as a packaging material in various fields. For example, consumer goods or grocery general packaging / envelopes, refrigerated / frozen foods ' packaging, Shrinkable over-wrapping films, bundle bundle films, sanitary ware films such as sanitary napkins or baby products, Lamination films Shrinkable Label packaging and snack packaging Mat films in addition, can also be widely used as industrial materials such as packaging materials, agricultural multi-film coating protects car seats, rubbish bags and compost.
- a polylactic acid resin and a packaging film may be provided. Therefore, such a polylactic acid resin and a packaging film can be preferably applied as a packaging material in various fields to replace a packaging film obtained from a crude oil-based resin, and can greatly contribute to preventing environmental pollution.
- NCO / OH terminal hydroxyl group of an isocyanate group / polyether-based polyol repeating unit (or (co) polymer) of a diisocyanate compound (e.g., nusamethylene diisocyanate) for formation of a polyurethane polyol repeating unit Represents the reaction molar ratio of ".
- OHV KOHmg / g
- Polyurethane poly is produced by dissolving a repeating unit (or (co) polymer) in dichloromethane and then acetylating it to hydrolyze it. Acetic acid was measured by titration with 0.1 N KOH methanol solution. This is based on the number of hydroxy groups present at the ends of the polyurethane polyol repeating units (or (co) polymers).
- Tg glass transition temperature, ° C: Using a differential scanning calorimeter (TA Instruments), after the sample was melted and rapidly heated, it was measured by raising the temperature to io ° c / min. The baseline near the endothermic curve and the mid value of each tangent line were Tg.
- Tm melting temperature, ° C: Using a differential scanning calorimeter (TA Instruments), the sample was melted and rapidly heated and measured at 10 ° C / min. The maximum value temperature of the melting endothermic peak of the crystal was Tm.
- F100 (kgf / miif) MD 100 obtained from the slope obtained by obtaining the slope of the tangent line as the contact point of the force at the time of 100% deformation in the tensile-distortion curve obtained in the tensile test of (6) above. The value of the stress at the time of% elongation was calculated
- ⁇ 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: NDH2000, Japan) 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, the antistatic and printing surfaces of the film sample were matched and left for 24 hours under silver and l K g / cuf pressure of 4C C. After that, 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. ⁇ : no change, O: slight surface change (less than 5%), X: over 5% peeling
- Organic carbon content rate of biomass origin (% C bio): Based on ASTM D6866, the organic carbon content rate of biomass origin is measured from the biomass origin content test by Percent Modern (C14). It was.
- PPDO 2.4 poly (1,3-propanediol); Number average molecular weight 2,400
- Poly is composed only of organic carbon of biomass origin
- PPDO 1.0 poly (1,3-propanediol); Number average molecular weight 1,000
- Poly is composed only of organic carbon of biomass origin
- PTMEG 3.0 poly tetramethylene glycol; Number average molecular weight 3,000
- Polyols consisting solely of organic carbon of biomass origin
- PTMEG 2.0 poly tetramethylene glycol; Number average molecular weight 2,000
- Polyols consisting solely of organic carbon of biomass origin
- PTMEG 1.0 poly tetramethylene glycol; Number average molecular weight 1,000
- a fleet of organic carbons of biomass origin A fleet of organic carbons of biomass origin
- PEG 8.0 polystyrene 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 1 1,000 2.
- HDI nucleated methylene diisocyanate
- TNPP Tris (nonylphenyl) phosphite
- U626 Bis (2,4-di-tbutylphenyl) Pentaerythritol Diphosphite
- the temperature was raised to 150 ° C to completely dissolve the L- (or D-) lactide, and 120 ppmmw of catalyst Tin 2-ethylhexylate to 500 ml of toluene relative to the total reactant content through the catalyst inlet was added to the reaction vessel.
- the reaction was carried out at 185 ° C. for 2 hours under 1 kg nitrogen pressurization, 200 ppmmw of phosphoric acid was added to the catalyst inlet, and mixed for 15 minutes to inactivate the residual catalyst. This was followed by the removal of non-banung L- (or D-) lactide (approximately 5 weights of the initial dose) by vacuum reaction until 0.5torr was reached.
- reaction reaction removes US reaction L-lactide (approximately 5 weights of the initial dose) until it reaches 0.5torr.
- the molecular weight characteristics, Tg, Tm and% C bio, etc. of the obtained resin were measured and shown in Table 1.
- Unbanung L-lactide (approximately 5 weights of initial dose) was removed by vacuum until it reached. Thereafter, D-L75 and 120ppmw of Dibutyltin Dilaurate 120ppmw of 130ppmw of catalyst were reacted with 500 ml of toluene through a catalyst inlet and added into the reaction vessel. The reaction was carried out at 190 ° C. for 1 hour under a nitrogen atmosphere, and the molecular weight characteristics, Tg, Tm, and% C bio, etc. of the obtained resin were measured and shown in Table 1 below.
- 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 such that NCO / OHV is 0.5 to 0.99.
- Polyurethane reaction such as poly (1,3-propanedi) to obtain a polyurethane polyol repeating unit (or (co) polymer) in which repeating units are linearly linked to a polyether poly such as poly (1,3-propanedi), which is used as an initiator and a soft segment.
- a polyether poly such as poly (1,3-propanedi
- the polylactic acid resin (block copolymer) corresponds to the polylactic acid resin (block copolymer) obtained by use.
- the polylactic acid resin includes the polyurethane poly in an appropriate content of 5 to 20 weight 0 /.
- these polylactic acid resins were identified to contain% C bio by content of about 90% by weight 0 /. Or more, using a monomer comprising organic carbon of biomass origin determined according to standard ASTM D6866.
- the resins A ⁇ E has been found to exhibit a significant environmentally friendly properties as the amount of carbon dioxide emitted during the production of 1 kg of resin is very low to about 0.65 to 0.67 .
- the polyurethane polyol repeating unit (or (co) polymer) in the polylactic acid resin has a value of OHV 3 to 20
- the polyurethane polyol repeating unit (or (co) polymer) may have a role as an initiator in the polymerization process for forming the polylactic acid repeating unit. It was confirmed that.
- the final prepared polylactic acid resin AE has a weight average molecular weight of 100,000 to 400,000, a molecular weight distribution of 1.80 to 2.15, Tg 25 to 55 ° C and Tm 160 to As it is 178 ° C, it was confirmed that not only the chip can be formed but also the film extrusion alone is suitable for the melt viscosity at 20C C or more.
- the resin L attempted 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 a 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% C bio content of less than 60% by weight 0 /. .
- the resin L had a low melt viscosity at a film extrusion temperature of 200 ° C. or higher, so that film production alone was impossible.
- resin M was prepared by ring-opening polymerization of L-lactide using a small amount of 1-Dodecano® as an initiator according to a general polylactic acid resin production method without introducing a softening component (polyurethane poly repeating unit) in the resin.
- a softening component polyurethane poly repeating unit
- the film was independently produced at a film extrusion temperature of 20C C or higher.
- the resin O uses a polyester poly such as PBSA, which is not a polyether polyol repeating unit, and a polyurethane formed from the repeating unit 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 form a copolymer with a polylactic acid repeating unit.
- This resin O was found to have a wide molecular weight distribution of 2.85, Tg too low compared to the present invention, and also relatively low Tm. In addition, it was confirmed that the resin 0 has a relatively high carbon dioxide emission rate because the% C bio content is relatively lower than those of the resins A to E.
- the resins P and Q add the polyether poly to the repeating unit first and then lactide to form the polyether pulliol repeating unit and the polylactic acid repeating unit.
- copolymers (resin P) in which such prepolymers are chain-extended with diisocyanate compounds after the production of copolymerized prepolymers
- branched copolymers (resin Q) in which the prepolymers are reacted with at least trifunctional isocyanate compounds.
- These resins P and Q have a wide molecular weight distribution of 2.50 and 3.91, an excessively low Tg compared with the present invention, and a relatively low Tm.
- the resins P and Q were relatively low in carbon dioxide emissions because the% C bio content was relatively lower than those of the resins A to E.
- the content of the softening component (polyurethane polyol repeating unit) in the polylactic acid resin is 5 to 20wt 0 /., 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) belonging to the scope of the present invention.
- the films of Examples 1 to 6 all have excellent mechanical properties with an initial tensile strength of 10 kgf / initf or more in the length and width directions, as well as excellent flexibility with a Young's modulus in the length and width directions of 750 kgf / mnf or less. Indication was confirmed. Moreover, it was confirmed that such a Young's modulus sum was not too low, but maintained an appropriate range, and stiffness also showed an appropriate level.
- the weight change rate when treated in a 10 CTC hot air oven for 1 hour is 3 wt% or less, the haze is 5% or less, the light transmittance is 90% or more, and the blocking resistance is also excellent, such as transparency, haze and blocking resistance. And excellent physical properties such as heat resistance.
- the film of Comparative Example 1 made of a general polylactic acid resin M, was found to have difficulty in being used as a packaging film due to insufficient flexibility because the sum of the length and width Young's modulus exceeded 750 kgf / mnf.
- the difference in melt viscosity between the two resins is too large, the extrusion state is poor, and the final film There was also a problem that occurred.
- the pin appearance occurred on the film, and the film appearance was poor.
- the Tg of the resin L was too low, causing problems such as blocking resistance, and the initial tensile strength and light transmittance were also poor.
- the films of Comparative Examples 3 and 4 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 5 is prepared from a copolymer in which a polyester polyol repeating unit is introduced and a glass transition temperature is low, thereby failing to satisfy the characteristics 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, the film exhibited poor heat resistance due to low Tg and Tm. Due to the blocking problem, filming was found to be difficult.
- the low compatibility of the polylactic acid with the polyester polyols used for the formation of the softening component was found to result in a high haze value and low transparency of the film, and the molecular weight was determined by the ester and / or ester amide exchange reaction during the preparation of the resin. It was confirmed that the distribution was wide, resulting in non-uniform melting characteristics, poor film extrusion state, and deterioration of mechanical properties.
- the films of Comparative Examples 6 and 7 include a resin obtained by urethane-reacting a prepolymer obtained by addition polymerization of lactide to a polyether polyol with a diisocyanate or a trifunctional or higher isocyanate compound, and this resin also has a low glass transition temperature. It does not satisfy the characteristics of the invention. These films were found to exhibit non-uniform melt viscosity and poor mechanical properties. In addition, as the blocking properties of the hard and soft segments in the resin are lowered and low Tm and Tg are exhibited, they exhibit poor heat resistance and film formation due to blocking problems. Difficulty was confirmed.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Biological Depolymerization Polymers (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyesters Or Polycarbonates (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015514901A JP2015518080A (ja) | 2012-06-01 | 2013-05-29 | ポリ乳酸樹脂およびこれを含む包装用フィルム |
CN201380038839.8A CN104487478A (zh) | 2012-06-01 | 2013-05-29 | 聚乳酸树脂和包含该聚乳酸树脂的包装膜 |
EP13797789.8A EP2857430A4 (en) | 2012-06-01 | 2013-05-29 | POLYMILIC ACID RESIN AND PACKAGING FILM THEREWITH |
US14/404,690 US20150147549A1 (en) | 2012-06-01 | 2013-05-29 | Polylactic acid resin and packaging film comprising the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2012-0059337 | 2012-06-01 | ||
KR20120059337 | 2012-06-01 | ||
KR10-2013-0060455 | 2013-05-28 | ||
KR1020130060455A KR102059492B1 (ko) | 2012-06-01 | 2013-05-28 | 폴리유산 수지 및 이를 포함하는 포장용 필름 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013180468A1 true WO2013180468A1 (ko) | 2013-12-05 |
Family
ID=49982900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2013/004716 WO2013180468A1 (ko) | 2012-06-01 | 2013-05-29 | 폴리유산 수지 및 이를 포함하는 포장용 필름 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20150147549A1 (ko) |
EP (1) | EP2857430A4 (ko) |
JP (1) | JP2015518080A (ko) |
KR (1) | KR102059492B1 (ko) |
CN (1) | CN104487478A (ko) |
TW (1) | TW201400520A (ko) |
WO (1) | WO2013180468A1 (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102130039B1 (ko) | 2014-06-05 | 2020-07-03 | 에스케이케미칼 주식회사 | 열 접착성 유연 폴리유산 수지 조성물 |
KR102296146B1 (ko) | 2014-06-05 | 2021-08-31 | 에스케이케미칼 주식회사 | 유연 폴리유산계 열 접착 필름 |
KR20170093028A (ko) * | 2016-02-04 | 2017-08-14 | 에스케이케미칼주식회사 | 물 소거제를 포함하는 유연 폴리유산 수지 조성물 |
KR102456006B1 (ko) * | 2016-03-24 | 2022-10-18 | 에스케이케미칼 주식회사 | 폴리유산 수지 조성물 및 이를 포함한 성형용품 |
JP2021070326A (ja) * | 2021-01-18 | 2021-05-06 | 大日本印刷株式会社 | 積層体およびそれを備える包装製品 |
CN112940264B (zh) * | 2021-03-02 | 2022-09-27 | 苏州市和好塑业有限公司 | 一种改性聚乳酸材料、其制法与应用 |
WO2023085806A1 (ko) | 2021-11-10 | 2023-05-19 | 에스케이케미칼 주식회사 | 폴리유산 수지, 폴리유산 수지 조성물, 폴리유산 수지 필름 및 성형체 |
KR20230068321A (ko) | 2021-11-10 | 2023-05-17 | 에스케이케미칼 주식회사 | 폴리유산 수지, 폴리유산 수지 조성물, 폴리유산 수지 필름 및 성형체 |
CN114479139B (zh) * | 2022-01-14 | 2023-08-25 | 江西冠德新材科技股份有限公司 | 一种纤维基降解薄膜及其制备方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050012798A (ko) * | 2002-06-20 | 2005-02-02 | 도레이 가부시끼가이샤 | 폴리락트산계 중합체 조성물, 그 성형품 및 필름 |
KR20050083835A (ko) * | 2002-11-12 | 2005-08-26 | 킴벌리-클라크 월드와이드, 인크. | 개선된 특성을 갖는 주름진 미세층을 구비한 필름 |
KR20070066367A (ko) * | 2005-12-22 | 2007-06-27 | 도레이새한 주식회사 | 포장재용 생분해성 폴리에스테르 필름 |
KR20090077010A (ko) * | 2006-11-01 | 2009-07-13 | 다우 글로벌 테크놀로지스 인크. | 폴리우레탄 조성물 및 그로부터 제조된 물품, 및 그의 제조 방법 |
WO2011054896A1 (en) * | 2009-11-05 | 2011-05-12 | Novamont S.P.A. | Biodegradable composition comprising polymers of natural origin and aliphatic-aromatic copolyesters |
KR20110008983U (ko) * | 2010-03-15 | 2011-09-21 | (주)엘지하우시스 | 바이오 폴리머 수지를 구비하는 바닥재 |
KR20120049103A (ko) * | 2010-11-08 | 2012-05-16 | 에스케이케미칼주식회사 | 폴리유산 수지 및 이를 포함하는 포장용 필름 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080103217A1 (en) * | 2006-10-31 | 2008-05-01 | Hari Babu Sunkara | Polyether ester elastomer composition |
US20090124719A1 (en) * | 2007-11-08 | 2009-05-14 | E. I. Dupont De Nemours And Company | Polyurethane foams from polytrimethylene ether glycol |
WO2009155085A2 (en) * | 2008-05-30 | 2009-12-23 | E. I. Du Pont De Nemours And Company | Renewably resourced chemicals and intermediates |
FR2936803B1 (fr) * | 2008-10-06 | 2012-09-28 | Arkema France | Copolymere a blocs issu de matieres renouvelables et procede de fabrication d'un tel copolymere a blocs. |
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 |
-
2013
- 2013-05-28 KR KR1020130060455A patent/KR102059492B1/ko active IP Right Grant
- 2013-05-29 WO PCT/KR2013/004716 patent/WO2013180468A1/ko active Application Filing
- 2013-05-29 US US14/404,690 patent/US20150147549A1/en not_active Abandoned
- 2013-05-29 EP EP13797789.8A patent/EP2857430A4/en not_active Withdrawn
- 2013-05-29 CN CN201380038839.8A patent/CN104487478A/zh active Pending
- 2013-05-29 JP JP2015514901A patent/JP2015518080A/ja active Pending
- 2013-05-31 TW TW102119371A patent/TW201400520A/zh unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050012798A (ko) * | 2002-06-20 | 2005-02-02 | 도레이 가부시끼가이샤 | 폴리락트산계 중합체 조성물, 그 성형품 및 필름 |
KR20050083835A (ko) * | 2002-11-12 | 2005-08-26 | 킴벌리-클라크 월드와이드, 인크. | 개선된 특성을 갖는 주름진 미세층을 구비한 필름 |
KR20070066367A (ko) * | 2005-12-22 | 2007-06-27 | 도레이새한 주식회사 | 포장재용 생분해성 폴리에스테르 필름 |
KR20090077010A (ko) * | 2006-11-01 | 2009-07-13 | 다우 글로벌 테크놀로지스 인크. | 폴리우레탄 조성물 및 그로부터 제조된 물품, 및 그의 제조 방법 |
WO2011054896A1 (en) * | 2009-11-05 | 2011-05-12 | Novamont S.P.A. | Biodegradable composition comprising polymers of natural origin and aliphatic-aromatic copolyesters |
KR20110008983U (ko) * | 2010-03-15 | 2011-09-21 | (주)엘지하우시스 | 바이오 폴리머 수지를 구비하는 바닥재 |
KR20120049103A (ko) * | 2010-11-08 | 2012-05-16 | 에스케이케미칼주식회사 | 폴리유산 수지 및 이를 포함하는 포장용 필름 |
Also Published As
Publication number | Publication date |
---|---|
KR102059492B1 (ko) | 2019-12-26 |
JP2015518080A (ja) | 2015-06-25 |
EP2857430A4 (en) | 2016-04-27 |
US20150147549A1 (en) | 2015-05-28 |
CN104487478A (zh) | 2015-04-01 |
TW201400520A (zh) | 2014-01-01 |
EP2857430A1 (en) | 2015-04-08 |
KR20130135758A (ko) | 2013-12-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102059492B1 (ko) | 폴리유산 수지 및 이를 포함하는 포장용 필름 | |
KR101191966B1 (ko) | 폴리유산 수지 및 이를 포함하는 포장용 필름 | |
JP5913343B2 (ja) | ポリ乳酸樹脂、その製造方法およびこれを含む包装用フィルム | |
JP5960725B2 (ja) | ポリ乳酸樹脂フィルムおよびその製造方法 | |
JP5960716B2 (ja) | ポリ乳酸樹脂組成物、包装用フィルムおよびポリ乳酸樹脂組成物の製造方法 | |
KR101804430B1 (ko) | 폴리유산 수지 필름 | |
KR101804431B1 (ko) | 폴리유산 수지 필름 | |
KR20150140166A (ko) | 유연 폴리유산계 열 접착 필름 | |
EP3153538B1 (en) | Thermally adhesive flexible polylactic acid resin composition | |
KR102043264B1 (ko) | 폴리유산 수지 필름 | |
KR101804429B1 (ko) | 폴리유산 수지 필름 | |
KR101717186B1 (ko) | 폴리유산 수지의 제조 방법 | |
KR20180124813A (ko) | 폴리유산 수지 조성물 및 포장용 필름 | |
KR20130139691A (ko) | 폴리유산 수지 필름 | |
KR20130139441A (ko) | 폴리유산 수지 조성물 및 이를 포함하는 포장용 필름 | |
KR20130139690A (ko) | 폴리유산 수지 조성물 및 포장용 필름 | |
KR20180124814A (ko) | 폴리유산 수지 조성물 및 이를 포함하는 포장용 필름 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13797789 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015514901 Country of ref document: JP Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2013797789 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013797789 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14404690 Country of ref document: US |