WO2019182352A1 - 폴리올레핀계 수지 조성물 및 이를 이용한 스트레치 필름 - Google Patents
폴리올레핀계 수지 조성물 및 이를 이용한 스트레치 필름 Download PDFInfo
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- WO2019182352A1 WO2019182352A1 PCT/KR2019/003247 KR2019003247W WO2019182352A1 WO 2019182352 A1 WO2019182352 A1 WO 2019182352A1 KR 2019003247 W KR2019003247 W KR 2019003247W WO 2019182352 A1 WO2019182352 A1 WO 2019182352A1
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
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- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F10/02—Ethene
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- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
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- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
- C08F4/65922—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
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- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
- C08F4/65922—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
- C08F4/65925—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not two cyclopentadienyl rings being mutually non-bridged
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2420/00—Metallocene catalysts
- C08F2420/01—Cp or analog bridged to a non-Cp X neutral donor
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- C08F2420/00—Metallocene catalysts
- C08F2420/02—Cp or analog bridged to a non-Cp X anionic donor
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2420/00—Metallocene catalysts
- C08F2420/07—Heteroatom-substituted Cp, i.e. Cp or analog where at least one of the substituent of the Cp or analog ring is or contains a heteroatom
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
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- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/65916—Component covered by group C08F4/64 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
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- C08J2423/04—Homopolymers or copolymers of ethene
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Definitions
- the present invention relates to a polyolefin resin composition exhibiting excellent long-term durability with improved physical properties and a stretch film using the same.
- Stretch films are commonly used as packaging films to fix the articles while transporting and storing them, and to prevent them from being damaged by external moisture or pollutants. Accordingly, the stretch film requires durability, stain resistance, and moisture resistance along with a thin thickness.
- polyethylene, polyvinyl chloride, polybutadiene, etc. are used in the production of the stretch film.
- the film is easily torn during packaging or transportation, or the internal items are damaged by the penetration of moisture.
- a method of using a linear low density polyethylene resin having excellent strength and rigidity has been proposed, and recently, the use of a linear low density polyethylene resin having a higher strength and rigidity by using a metallocene catalyst has been increasing.
- the linear low density polyethylene resin prepared with a metallocene catalyst shows excellent strength and rigidity, but the extruder motor load is increased due to the melting characteristics, thereby lowering productivity.
- a method of mixing and using a high strength yarn resin together with a polyethylene resin has also been proposed, but there is a problem in that long-term durability is lowered when manufacturing a product such as a baler net.
- Factors affecting long-term durability are the properties and additives of the resin itself.
- Conventional high strength yarn resins have good initial physical properties due to their narrow melt flow rate ratio (MFRR), but they can be used for dynamic mechanical analysis (dynami c Mechani cal analys is; DMA). Shear stress due to high internal stress causes long-term durability.
- MFRR narrow melt flow rate ratio
- DMA dynamic mechanical analysis
- Shear stress due to high internal stress causes long-term durability.
- a resin having a narrow MFRR since the resin crystals are hard, penetration of the additive is difficult even if an additive for improving it is used.
- the present invention is to improve the above problems, to provide a polyolefin resin composition and a method of manufacturing the same showing excellent long-term durability with improved physical properties.
- the present invention also provides an article such as a stretch film or a baler net manufactured by using the polyolefin resin composition.
- a polyethylene homopolymer having a melt index of 0.8 g / 10 min or less (MI, measured at 2. 16 kg load at 190 ° C. according to ASTM D1238);
- 3 ⁇ 4 ⁇ Viscosity measured after storing the polyolefin resin composition in an oxygen condition at 240 ° (: for 2,000 seconds.
- an article such as a stretch film or a baler net prepared using the polyolefin resin composition described above.
- the terminology used herein is for the purpose of describing exemplary embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.
- the terms “comprise”, “comprise” or “have” are intended to indicate that there is a feature, step, component, or combination thereof that is practiced, and that one or more other features or steps are present. It is to be understood that the present invention does not exclude in advance the possibility of the presence or the addition of elements, components, or combinations thereof.
- olefin polymers '' are ethylene homopolymers or copolymers in which ethylene and alpha olefins are copolymerized, and repeating units derived from physical or chemical properties such as ethylene or propylten and alpha olefins, respectively.
- a copolymer may include a plurality of repeating unit blocks or segments that may be distinguished from each other in one or more properties such as their content (mole fraction), crystallinity, density, or melting point. have.
- the “polymer chain (s)” included in the “olefin polymer” may refer to a plurality of polymer chains formed when the olefin polymer is polymerized and prepared.
- the molecular weight of these polymer chains, etc. can be confirmed through the molecular weight distribution curve using gel permeation chromatography 1 ⁇ 2 ⁇ ).
- the distribution of SCB (Short Chain Branch) in the polymer chain can be confirmed by analyzing the block copolymer by Fourier transform infrared spectroscopy (FT-IR).
- FT-IR Fourier transform infrared spectroscopy
- the content of the polymer chain can be confirmed through analysis using 1H-nuclear magnetic resonance (1H-Nuclear Magnetic Resonance spectroscopy; 1H-NMR).
- Such polymer chains may be defined as the ⁇ polymer chain (s) '' included in the "olefin polymer”.
- SCB short chain branch
- a chain more specifically, may refer to a chain having 4 to 7 carbon atoms, or 4 to 6 carbon atoms, or 4 carbon atoms.
- the number of such SCB can be calculated by analyzing the molecular weight distribution graph of the olefin polymer measured by GPC-FTIR.
- the use of polyethylene homopolymers (HOMO) which do not contain SCB and having a low to improve the long-term durability of the polyethylene homopolymer (HOMO) In order to compensate for the problem of workability deterioration due to use, by mixing and using a polyethylene copolymer (C0M0) having an optimized and low SCB content at the same time by controlling the hydrogen input during polymerization, the MFRR of the resin composition is narrowed, By being reduced, excellent long-term durability can be exhibited, and physical properties such as mechanical strength and workability can be improved.
- C0M0 polyethylene copolymer
- the polyolefin resin composition according to one embodiment of the invention, i) polyethylene homo polymer having a weight of 2. 16 kg at 190 ° C. according to MKASTM D1238 of 0.8g / 10min or less); And
- Normalized viscosity (: 4 : ⁇ 100: Initial viscosity of polyolefin resin composition (2401: measured under anoxic conditions)
- the viscosity of the polyolefin resin composition measured after storing the said polyolefin resin composition in 240 degreeC for 2, ⁇ 0 second under oxygen conditions.
- the polyethylene homopolymer does not include the seedlings, and is controlled to be 0.8 ⁇ / 10111 ratio or less, more specifically 0.4 to 0.8 yo / It has 1 of 10
- the monovalent value of the polyethylene homopolymer exceeds 0.8 / 10/10 [11], it is difficult to realize the long-term durability of the resin composition, that is, the effect of improving the life characteristics.
- the polyethylene homopolymer can be measured with a 2.1613 ⁇ 4 load at 1901: according to show 1) 1238.
- the polyethylene homopolymer has a high density with low VIII.
- the polyethylene homopolymer has a density measured according to show 1) 1505 of 0.943 ⁇ 4 / 0 or more, or 0.940 to 0.960 ⁇ / 00, more specifically 0.948 to 0.960 ⁇ / 00, even more specifically 0.948 To 0.952 ⁇ / (:( :).
- the polyethylene homopolymer as described above is not particularly limited in its manufacturing method, but, for example, may be prepared by polymerizing an ethylene monomer using a metallocene catalyst. At this time, hydrogen gas may be further selectively added.
- the polyethylene as a method for the homopolymer produced in the presence of the invention
- the compound is mixed supported on the carrier, the hydrogen zero.
- Physical ethylene homopolymers embodying the above properties can be prepared by a preparation method comprising the step of polymerizing an ethylene monomer in an amount of 1 to 1.5 yaw /
- the polymerization reaction may employ a variety of polymerization processes known as polymerization of ethylene monomers, such as continuous solution polymerization process, bulk polymerization process, suspension polymerization process, slurry polymerization process or emulsion polymerization process, according to one continuous It can be carried out by homopolymerizing the ethylene monomer using a slurry polymerization reactor, loop slurry reactor, gas phase reactor or solution reactor.
- polymerization processes known as polymerization of ethylene monomers, such as continuous solution polymerization process, bulk polymerization process, suspension polymerization process, slurry polymerization process or emulsion polymerization process, according to one continuous It can be carried out by homopolymerizing the ethylene monomer using a slurry polymerization reactor, loop slurry reactor, gas phase reactor or solution reactor.
- hydrogen may be introduced at a rate of 0.1 to 1.5-, more specifically, 0.01 to 1.0 or 0.2 to 0.0 3 // under 1 atmosphere of the reactor during the polymerization reaction. If hydrogen gas is added in the above range, 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- the density and «of the polyethylene homopolymer produced while exhibiting catalytic activity can be controlled within the above-described ranges.
- 1111 is 0.8 / 10
- the polymerization reaction temperature may be 25 to 500 ° 0, specifically 25 to 200 V, more specifically 50 to 1501 :.
- the polymerization pressure is 1 to 10 3 ⁇ 4 0
- Such polyethylene homopolymer may be included in an amount of 25 to 75% by weight based on the total weight of the polyolefin resin composition.
- the content of the polyethylene homopolymer is too low, less than 25% by weight, it is difficult to obtain an improvement effect such as the aging characteristics due to the inclusion of the above-described polyethylene homopolymer, and when the content of the polyethylene homopolymer is excessively higher than 75% by weight, processability There is a possibility that it is not extended by this fall.
- the polyethylene homopolymer may be included in 25 to 50% by weight relative to the total weight of the resin composition.
- the polyethylene copolymer is prepared by polymerizing and reacting an ethylene and an alpha olefin having 4 or more carbon atoms under the conditions of hydrogen dosage control during a polymerization reaction using a metallocene group, Molecular weight distributions comprising repeating units derived from ethylene and an alpha olefin having 4 or more carbon atoms, each measured at a load of 1901: to 2.1613 ⁇ 4 in accordance with ⁇ ⁇ 1) 1238) of 0.5 ⁇ / 10111 ratio or less and In the graph, the average value of 808 per 1,000 carbon atoms is 6 or less.
- the present invention by using a metallocene catalyst to control the hydrogen input amount during the production of polyethylene copolymer to lower than 0.5 ⁇ / 10 11 or less, while preventing the long-term durability of the resin composition due to the occurrence of double bonds, It can exhibit better mechanical strength properties along with excellent processability.
- the kinetics of the polyethylene copolymer exceed 0.5-yo / 10 11, there exists a possibility that the long-term durability and mechanical strength characteristics of a resin composition by mixing with the polyethylene homopolymer mentioned above may fall. More specifically, the polyethylene copolymer may be 0.1 to 0.4 ⁇ / 10 10.
- alpha olefin comonomers such as 1-butene and 1-nucleene are incorporated into the carbon chain of the main chain during the polymerization process to be produced in a branched form, and the air of the comonomers during the polymerization process The higher the synthesis, the better the workability can be exhibited.
- the polyolefin resin composition according to one embodiment of the present invention includes a polyethylene homopolymer having a low for long-term durability improvement.
- the polyethylene homopolymer does not have £ ⁇ , the workability of the resin composition is deteriorated.
- the polyethylene copolymer mixed with the above-described polyethylene homopolymer By optimizing, it is possible to improve workability and improve life characteristics.
- the number of 506 affecting the lifetime can be reduced by reducing the hydrogen input amount below a predetermined value. Specifically, when the hydrogen input amount is reduced during the polymerization reaction, the low molecular weight generation amount is reduced to decrease the density.
- the number of 308 can be reduced by reducing the input amount of comonomer in order to have an appropriate level of density.
- the resin composition is obtained by using a polyethylene copolymer having an average value of 6 or less per 1,000 carbon atoms, more specifically, 3 to 6, by controlling the amount of hydrogen added during the polymerization reaction, and further, the amount of comonomer added. While maintaining the long-term durability improvement effect can exhibit excellent physical properties including workability. Life expectancy due to polyethylene copolymer when average value of seedlings per 1,000 carbon atoms exceeds 6 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- the effect may be lowered.
- the polyethylene copolymer may have a density of 0.940 and 0.95 ⁇ / 0 :, more specifically, 0.945 to 0.950: (:) as measured according to the Shove [ ) 1505 criterion.
- a density within the above range under the conditions to meet, it is possible to improve the strength and rigidity in film production.
- alpha olefin contained in the polyethylene copolymer specifically 1-butene, 1-pentene, 1-nuxene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-nuxadecene, Alpha olefins having 4 to 20 carbon atoms such as 1-octadecene, 4-methyl-1-pentene, and the like, and any one or a mixture of two or more thereof may be included. More specifically, it may be 1-butene.
- the alpha olefin-derived repeating unit may be included in 1 to 5 mol% of the polyethylene copolymer.
- the polyethylene copolymer When included within the above content range, the polyethylene copolymer may exhibit more excellent processability. However, if the content of the alpha olefin-derived repeating unit is less than 1 mol%, it is difficult to obtain a processability improvement effect by including the alpha olefin-derived repeating unit, and if it exceeds 5 mol%, the life improvement effect may be reduced. In consideration of the excellent workability improvement effect by controlling the content of the alpha olefin-derived repeating unit, more preferably, the alpha olefin-derived repeating unit may be included in an amount of 2 to 4 mol% based on the total weight of the copolymer.
- the polyethylene copolymer having the characteristics as described above is not particularly limited in its preparation method, for example, the first transition metal compound of Formula 1 and the second transition metal compound of Formula 2 are hybridly supported on a carrier.
- hydrogen in an amount of from 0.1 to 0.5 / 111- and copolymerizing ethylene with an alpha olefin having at least 4 carbon atoms, wherein the alpha olefin is based on 2.0 to 3.0 /
- 0? 1 and 0! 2 are the same as or different from each other, and each independently selected from the group consisting of cyclopentadienyl, indenyl, 4, 5, 6, 7-tetrahydro-l-indenyl, and fluorenyl radicals Which may be substituted by one or more of the hydrocarbon groups of 01 to 020;
- ⁇ And are the same as or different from each other, and are each independently hydrogen, alkyl of 01-020, alkoxy of 01-(: 10, alkoxyalkyl of 02-020, aryl of 06-020, aryloxy of 06-(: 10), 02-020 Alkenyl, 07 to
- Silver halogen atom 01-020 alkyl, (32-(: 10 alkenyl, 040 alkylaryl, 07-040 arylalkyl, 06-020 aryl, substituted or unsubstituted 01-020 alkylidene) , A substituted or unsubstituted amino group, alkylalkoxy of 02 to 020, or arylalkoxy of 07 to 040, and when substituted, they may be substituted with a hydrocarbon group of 01 to 020;
- X are each independently an integer of 0 to 4,
- 0 ⁇ 3 is any one selected from the group consisting of cyclopentadienyl, indenyl, 4, 5, 6, 7-tetrahydro-1_indenyl and fluorenyl radicals, which are substituted with hydrocarbon groups of 01 to 020 Can be;
- 8 2 is at least one or a combination of carbon, germanium, silicon, phosphorus or nitrogen atom-containing radicals which crosslink 0 0 3 3 () 2 ) ring and 1;
- ⁇ is an integer from 0 to 4.
- the alkyl group of 01 to 020 includes a linear or branched alkyl group, and specifically, methyl group, ethyl group, propyl group, isopropyl group, 11_butyl group, near-butyl group, pentyl group, nuclear group, heptyl group, Octyl group etc. can be mentioned, It is not limited to this.
- the alkenyl group of 02 to 020 includes a straight or branched alkenyl group, and specifically, an allyl group, an ethenyl group, a propenyl group, a butenyl group, a pentenyl group, and the like may be used, but is not limited thereto.
- the aryl groups of 06 to 020 include monocyclic or condensed aryl groups, and specifically include phenyl groups, biphenyl groups, naphthyl groups, phenanthrenyl groups, and fluorenyl groups, but are not limited thereto.
- the alkylaryl of 07 to 040 means a substituent in which at least one hydrogen of aryl is substituted by alkyl, wherein the alkyl and alkoxy groups are as defined above.
- Specific examples include methylphenyl, ethylphenyl, 11 ⁇ propylphenyl, 0-propylphenyl, 11_butylphenyl, Re-butylphenyl or cyclonuxylphenyl, and the like, but are not limited thereto.
- the arylalkyl of 07 to 040 means a substituent in which at least one hydrogen of alkyl is substituted by aryl, wherein the alkyl and alkoxy groups are as defined above. Specific examples include, but are not limited to benzyl group, phenylpropyl or phenylnuclear chamber. 2019/182352 1 »(1 ⁇ 1 ⁇ 2019/003247
- alkoxy group of 01 to 020 examples include a methoxy group, an ethoxy group, a phenyloxy group, a cyclonuxyloxy group, and the like, but are not limited thereto.
- the alkoxyalkyl group of 02 to 020 means a substituent in which one or more hydrogens of alkyl are substituted by an alkoxy group, wherein the alkyl and alkoxy groups are as defined above. Specifically, methoxyethyl, 1: -butoxypentyl, a nucleus chamber, etc. are mentioned, It is not limited to this.
- the hydrocarbon group of 01 to 020 may be an alkyl group of 01 to 020, an alkenyl group of 02 to 020, a cycloalkyl group of 03 to 020, or an aryl group of 06 to 020, or a combination thereof, each of which is defined above. As shown.
- the halogen 0131 611) may be fluorine (, chlorine 0: 1), bromine () or iodine (I).
- Group 4 transition metal examples include titanium, zirconium, and hafnium, but are not limited thereto.
- the first transition metal compound of Formula 1 is low It is useful for the production of low molecular weight polymers having a content
- the second transition metal compound of Chemical Formula 2 is an easy compound for preparing a low molecular weight polymer having a medium content of 808. These low) 1 and second transition metal compounds When is mixed and supported on the same carrier, low 806 and can be more easily achieved.
- the crab 1 transition metal compound may be, for example, a compound represented by one of the following structural formulae, but is not limited thereto:
- 1 in Formula 1 is 0? ' And 01) 2 may each be a cyclopentadienyl group.
- 0) 1 and .1) 2 may each be substituted with 1 to 4 ⁇ and , and when X and are each an integer of 2 or more, a plurality of and may be the same as or different from each other.
- ⁇ and ⁇ are the same or Different and each independently may be hydrogen, C1 to C12 alkoxy, or C2 to C12 alkoxyalkyl, more specifically R a and R b are both C2 to C12 alkoxyalkylyl such as t-butoxynuxyl Can be.
- R a and R b have such a substituent, the first transition metal compound may have better supporting stability.
- two Z 1 may be identical to or different from each other, and may each independently be any one of halogen.
- the first transition metal compound in which Z 1 has a substituent as described above may be easily substituted with an alkyl group by a reaction with an alkyl metal or methylaluminoxane as a promoter.
- a cationic form (cat i oni c form), which is the active species of the olefin polymerization reaction, is formed by the alkyl abst ract ion forming the first transition metal compound with the cocatalyst. ) Can be provided more easily.
- the second transition metal compound may be, for example, a compound represented by one of the following structural formulas, but is not limited thereto:
- # of Formula 2 is ⁇ , ⁇ may be cyclopentadienyl.
- the first transition metal compound may have a better supported stability.
- ⁇ may be a silicon-containing radical
- the silicon-containing radical may be a divalent silane substituted with hydrogen, alkyl of a-020, alkoxy of XI-020, or alkoxyalkyl of 02-020, more specifically Is alkyl of 01 to : 12, such as methyl and ethyl; Or a divalent silane substituted with 02 to 120 alkoxyalkyl, such as 1: butoxynuclear chamber.
- Formula 2 may be an alkyl of 01 to 020, more specifically of 3 to 12 carbon atoms such as butyl group 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- the second transition metal compound of Formula 2 having a substituent of the above combination may be supported on the carrier together with the first transition metal compound of Formula 1 to exhibit better catalytic activity, and to facilitate the molecular weight distribution of the polyethylene homopolymer. By adjusting the desired physical properties can be easily implemented.
- the first transition metal compound and the second transition metal compound may be included in the mixed supported catalyst in a molar ratio of 1: 0.1 to 1: 0.9, or 1: 0.2 to 1: 0.8, or 1: 0.3 to 1: 0.5. have.
- a molar ratio of 1: 0.1 to 1: 0.9, or 1: 0.2 to 1: 0.8, or 1: 0.3 to 1: 0.5. have.
- a carrier containing a hydroxyl group or a siloxane group may be used as a carrier.
- the carrier may be a carrier containing a highly reactive hydroxyl group or siloxane group by drying at high temperature to remove moisture on the surface. More specifically, silica, alumina, magnesia or a mixture thereof may be used as the carrier.
- the carrier may be dried at high temperature, and they may typically include oxides, carbonates, sulfates, nitrates, such as 2 0, 1 ( 2 0 3 , 6 3 50 4 and 3 ⁇ 43 ⁇ 4 0 3 ) 2, etc. .
- the carrier may be included in an amount of 10 to 1,000 weight ratio, more specifically 10 to 500 weight ratio based on 1 weight ratio of the metallocene compound including the first and second transition metal compounds.
- the hybrid supported catalyst prepared when included in the above-mentioned ratio of rain ratio has an optimum shape and can exhibit more excellent catalytic activity.
- the hybrid supported catalyst may further include a promoter for activating transition metal compounds that are catalyst precursors.
- a promoter for activating transition metal compounds that are catalyst precursors As the cocatalyst, a conventional use in the art to which the present invention pertains may be applied without particular limitation.
- the promoter may be at least one compound selected from the group consisting of compounds represented by the following Chemical Formulas 3 to 5.
- the hybrid supported catalyst may further include at least one cocatalyst selected from the group consisting of compounds represented by the following Chemical Formulas 3 to 5. 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- 3 ⁇ 4 may be the same or different from each other, and each independently halogen; An alkyl group of 01 to 020; Or an alkyl group of 01 to 020 substituted with halogen; Is an integer of 2 or more;
- urine is a neutral or cationic Lewis base
- Is a hydrogen atom
- ⁇ is a Group 13 element
- the show may be the same or different from each other, and each independently is an alkyl group having 1 to 20 carbon atoms or an alkyl group having 1 to 20 carbon atoms substituted or unsubstituted with one or more hydrogen atoms, halogen, 01 to 020 alkyl group, alkoxy or phenoxy.
- Non-limiting examples of the compound represented by the formula (3), methyl aluminoxane, ethyl aluminoxane, Butyl aluminoxane or 161 * !;-Butyl aluminoxane etc. are mentioned.
- Non-limiting examples of the compound represented by Formula 4 include trimethylaluminum, triethylaluminum, triisobutylaluminum, tripropylaluminum, tributylaluminum, dimethylchloroaluminum, triisopropylaluminum, tri-butylaluminum, Tricyclopentyl Aluminum, Tripentyl Aluminum, Triisopentyl Aluminum, Trinuclear Aluminum, Trioctyl Aluminum, Ethyl Dimethyl Aluminum, Methyl Diethyl Aluminum, Triphenyl Aluminum, Tri-Tolyl Aluminum, Dimethyl Aluminum methoxide or Dimethyl Aluminum Ethoxide Etc. can be mentioned.
- non-limiting examples of the compound represented by the formula (5) include trimethylammonium tetrakis (pentafluorophenyl) boreat, triethylammonium tetrakis (pentafluorophenyl) borate,- 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- the promoter may be included in a molar ratio of 1 to 20 based on 1 mole of the metallocene compound including the first and second transition metal compounds. When included in the above content range, the effect by the promoter can be expressed at a certain level or more, and the physical properties of the polyethylene homopolymer prepared through the effective activation of the metallocene compound can be properly adjusted.
- Such a hybrid supported catalyst can be prepared by, for example, supporting a promoter on a carrier and supporting first and second transition metal compounds serving as catalyst precursors on the carrier supported carrier.
- Specific examples of the method for preparing the hybrid supported catalyst may be referred to the following examples.
- the preparation method of the hybrid supported catalyst is not limited to the contents described herein, and the preparation method may further employ a step generally employed in the technical field to which the present invention belongs, and the step of the preparation method. (S) may be modified by conventionally changeable step (s).
- the hybrid supported catalyst may be an aliphatic hydrocarbon solvent having 5 to 12 carbon atoms, for example, pentane, nucleic acid, heptane, nonane, decane, isomers thereof, and aromatic hydrocarbon solvents such as toluene and benzene, dichloromethane, chlorobenzene, and the like. 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- the alpha olefins usable in the preparation of the polyethylene copolymer are specifically 1-butene, 1-pentene, 1-nuxene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene and 1-nucleus.
- Alpha olefins having 4 to 20 carbon atoms such as decene, 1-octadecene, 4-methyl- 1-pentene and the like, and any one or a mixture of two or more thereof may be used in the preparation of the polyethylene copolymer. More specifically, it may be 1-butene.
- the polymerization reaction of the ethylene and the alpha olefin may employ various polymerization processes known as polymerization reactions of olefin monomers such as continuous solution polymerization process, bulk polymerization process, suspension polymerization process, slurry polymerization process or emulsion polymerization process.
- hydrogen may be introduced at a rate of 0.1 to 0.5 g / hr, specifically, 0.2 to 0.5 for eight-second II.
- hydrogen gas is added in the above range, the content of 508 in the copolymer produced while exhibiting sufficient catalytic activity can be easily controlled within the above range.
- the hydrogen gas is to activate the inert site of the metallocene catalyst, to act as a chain transfer reaction to control the molecular weight, in the present invention by controlling the hydrogen input amount within the above range, 0.5 ⁇ / 10! Can be reduced to 11 or less.
- the amount of hydrogen gas added during the polymerization reaction is 0.5 //, it is difficult to reduce the polyethylene homopolymer to 0.5 ⁇ / 10 11 or less, and in this case, it is difficult to realize the effect of improving the long-term durability and mechanical properties of the resin composition.
- the amount of hydrogen gas input is less than 0. /, 1111 of the polyethylene copolymer may be reduced, but problems such as premature breakage upon aging due to the remaining double bonds in the chain may occur.
- the alpha olefins mentioned above are additionally May affect the content. Accordingly, in the present invention, the alpha olefin may be added in an amount such that carbon in the polyethylene copolymer is less than 6, more specifically 3 to 6, in the polyethylene copolymer under conditions satisfying the hydrogen input range. Can be. Specifically, the alpha olefin may be added in an amount of 2.0 to 3.0 / !! based on ethylene monomer 10 13 ⁇ 4 / input. When added within the above content range, it is possible to easily prepare a polyethylene copolymer that satisfies the above 506 conditions. However, when the amount of the alpha olefin monomer is less than 2.0 or exceeds 3.0 ⁇ 111 1111, it may be difficult to prepare a polyethylene copolymer satisfying the above 808 conditions.
- the polymerization reaction temperature may be 25 to 5001 :, specifically, 25 to 200 ° 0, and more specifically 50 to 1501 :. Further, the polymerization pressure is 1 to 100 531-, specifically 1 to 50-, more specifically 5 to 30
- the polyethylene copolymer may be included in an amount of 25 to 75% by weight based on the total weight of the polyolefin resin composition.
- the content of the polyethylene copolymer is too low, less than 25% by weight, it is difficult to obtain the effect of improving the processability by including the polyethylene copolymer described above, and when the content of the polyethylene copolymer is too high, which is more than 75% by weight, the life of the characteristics of the degradation There is concern.
- the polyethylene copolymer may be included in 50 to 75% by weight relative to the total weight of the resin composition.
- the polyolefin resin composition according to one embodiment of the present invention may be prepared by using a conventional polymer mixing method of the ⁇ ' ) polyethylene homopolymer and) polyethylene copolymer.
- hydrogen is added in an amount of 0.1 to 0.5 for ethylene in the presence of a supported catalyst in which the first transition metal compound of Formula 1 and the second transition metal compound of Formula 2 are hybridly supported on a carrier.
- Monomer and C4 Polymerizing the above alpha olefins, containing repeating units derived from alpha olefins having 4 or more carbon atoms, and having a melt index (measured at 2. 16 kg load at 190 ° C according to ASTM D1238) of 0.5 g / 10 min or less, measured by GPC-FTIR.
- the alpha olefin may be prepared by the method for producing a polyolefin-based resin composition, which is added in an amount of 2.0 to 3.0ml / min based on the 10kg / hr input of the ethylene monomer.
- the production method after the polyethylene copolymer is prepared before the mixing step of the polyethylene copolymer and the polyethylene homopolymer, or before the polyethylene copolymer, the first transition metal compound of Formula 1 and the second transition metal of Formula 2 In the presence of a supported catalyst in which the compound is hybridly supported on a carrier, hydrogen is added in an amount of 0.1 to 1.5 g / hr to polymerize the ethylene monomer,
- the method may further include preparing a polyethylene homopolymer having a melt index of 0.8 g / 10 min or less (measured by 2. 16 kg load at 190 ° C. according to ASTM D1238).
- the hybrid supported catalyst used for the production of the polyethylene copolymer and the polyethylene homopolymer and the method for producing the respective copolymer and the homopolymer using the same are as described above.
- the i) polyethylene homopolymer and ii) polyethylene copolymer may be dry mixed using, for example, a Henschel mixer, a tumbler mixer or the like, or the dry mixed mixture may be extruded, a mixing roll, a roll mill, It may be further melt mixed using a kneader such as a kneader, a Banbury mixer or the like.
- the 0 polyethylene homopolymer and ii) polyethylene copolymer may be mixed in a weight ratio of 3: 1 to 1: 3.
- the mixing ratio of the polyethylene homopolymer and the polyethylene copolymer in the resin composition is within the above range. 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- polyethylene homopolymer and 10 polyethylene copolymer may be included in a weight ratio of 1: 1 to 1: 3.
- additives such as an antioxidant, an antistatic agent, a slip agent, an antiblocking agent, a lubricant, a pigment, a dye, a plasticizer, an antioxidant, or the like may be added.
- additives may be included in an appropriate amount within a range that does not impair the physical properties of the resin composition, specifically, may be included in 0.1 to 1 parts by weight based on 100 parts by weight of the mixture of the polyethylene homopolymer and the polyethylene copolymer.
- the polyolefin resin composition mixed and prepared in this way was subjected to a load of 190 ° (from 2. to 1613 ⁇ 4) under the condition of 131238 under a density of 0.930 to 0.960, which was measured according to Yoshi (1) 1505. Measured And 0. 1 to 0.5 / 1 for ⁇ 1011, «5/2 is less than the ratio ppya ⁇ 16 is 3.1, and a molecular weight distribution of 2.5 to 4.2, 2401: A storage in an oxygen conditions for 2, 000 seconds
- the normalized viscosity calculated according to Equation (1) from the rheological properties, specifically, the viscosity change measured using a post rheometer (Vemia) is 20 to 30%. As described above, while maintaining excellent physical properties with a narrow slab of less than 3. 1, while exhibiting a low normalized viscosity of 20 to 30% with low shock, it shows excellent effects in terms of both basic properties and processability and long life. Can be.
- the rheological properties measured using the rheometer under the conditions that is, the normalized viscosity calculated according to Equation 1 from the viscosity change amount is 25 to 30%, and can exhibit improved mechanical properties and long-term durability in addition to the above-described implementation effects. have.
- the resin composition also exhibits reduced residual stress due to low.
- the resin composition may have a residual stress (at 100s, 140 ° C.) of less than 1%, or 0.01% or more and less than 1%, more specifically 0.1 to 0.4%.
- having a reduced residual stress in the above-described range can result in improved long-term durability.
- the residual stress of the polyolefin-based resin composition may be instantaneous by the method of DMA (Dynamic Mechanical Analysis). For example, after taking a polyolefin-based resin composition and applying a strain of 200% at 140 ° C., the change in residual stress can be measured for 100 seconds. In this case, a TA Hybrid Instruments Discovery Hybrid Rheometer (DHR) may be used.
- DMA Dynamic Mechanical Analysis
- the polyolefin resin composition may have a weight average molecular weight (Mw) measured by GPC of 50,000 to 250,000 g / mol.
- Mw weight average molecular weight measured by GPC of 50,000 to 250,000 g / mol.
- the weight average molecular weight (Mw) of a resin composition means the weight average molecular weight (unit: g / mol) of polystyrene conversion measured by GPC method, and molecular weight distribution is a weight average molecular weight and a number average molecular weight ( It is the value which calculated
- the polyolefin resin composition exhibits improved physical properties, in particular mechanical strength properties.
- the polyolefin resin composition is molded into a film having a thickness of 100, and the tensile strength measured based on ASTM D1709A is more than 2.0 gf / den, more specifically. Is 2.4 gf / den or more, and more specifically 2.5 gf / den or more.
- the tensile strength of the polyolefin resin composition is 2.0 gf / den or less, it is difficult to attain sufficient strength when the resin composition is applied to a film, particularly a stretch film.
- a film comprising or using the polyolefin resin composition, more specifically a stretch film.
- the film is a variety of known in the field of polymer molding, such as T-die method 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- a baler network 11) including or using the polyolefin resin composition is provided.
- the baler net may be manufactured using a conventional baler net manufacturing method except for using the resin composition described above, and exhibits excellent mechanical properties and workability while significantly improving long-term durability by using the resin composition. Can be.
- the polyolefin resin composition according to the present invention has improved long-term durability and improved physical properties, and thus is useful for the production of films, particularly stretch films.
- 1 and 2 are diagrams showing the molecular weight distribution curves (solid line) and number distribution of seedlings per 1000 carbon atoms (dotted lines) of the polyethylene copolymers prepared in Production Examples 1 and 2, respectively.
- FIG. 3 is a diagram showing the molecular weight distribution curve (solid line) of the polymer in the resin composition used in Comparative Example 4 and the number distribution (dotted line) of yaw per 1000 carbon atoms.
- a polyethylene copolymer was prepared in the same manner as in Preparation Example 1, except that the hydrogen input amount was changed to 0.7 g / hr.
- Preparation Example 3 Preparation of Polyethylene Copolymer (C0M0)
- the polyethylene copolymer was prepared in the same manner as in 1.
- Preparation Example 4 Preparation of Polyethylene Homopolymer (HOMO)
- the polyethylene homopolymer (H0M0) prepared in Preparation Example 4 and the polyethylene copolymer prepared in Preparation Example 1 were mixed in a weight ratio of 1: 1 to prepare a resin composition. 2019/182352 1 »(: 1 ⁇ 1 ⁇ 2019/003247
- the resin composition was gradated by mixing in a weight ratio of the polyethylene homopolymer band (10) prepared in Preparation Example 4 and the polyethylene copolymer 0X10) rule 5: 1 prepared in Preparation Example 1.
- Comparative Example 6 Preparation of Polyolefin Resin Composition As shown in Table 1, the polyethylene homopolymer (HOMO) prepared in Preparation Example 4 and the polyethylene copolymer (C0M0) prepared in Preparation Example 1 were mixed in a weight ratio of 1: 5 to prepare a resin composition.
- Comparative Example 7 Preparation of Polyolefin Resin Composition
- Density was measured according to the show 3 ⁇ 4 1 1 1505.
- MI Melt index
- SCB short chain branch; dog / 1, 000C
- GPC gel permeation chromatography
- Ge Permeat i on Chromatography was used to derive the molecular weight distribution curves of the polymer chains of the polyethylene copolymers prepared in Preparation Examples 1 and 2, and are represented by continuous curves in FIGS. 1 and 2.
- each polyethylene copolymer was analyzed by FT-IR to derive the distribution of the number value (right Y axis) of SCB per 1000 carbon atoms according to the molecular weight (X axis) of the polymer chains, and discontinuous in FIGS. 1 and 2. Dotted line / The average value of the number of SCBs per 1000 carbon atoms (SCB per 1000) for all molecular weight ranges was determined from the above results.
- 1 and 2 are diagrams showing the molecular weight distribution curves (solid line) and the number distribution of SCBs per 1000 carbon atoms (dashed lines) of the polyethylene copolymers prepared in Production Examples 1 and 2, respectively.
- MI Melt Index
- GPC gel permeation chromatography
- the measurement was performed using a Polymer Laboratories PLgel MIX-B 300 ⁇ length column and a Waters PL-GPC220 instrument.
- the evaluation temperature was 160 ° C.
- 1,2,4-trichlorobenzene was used as the solvent and the flow rate was measured at a rate of lmL / min.
- Samples were prepared at a concentration of lOmg / lOmL and then fed in an amount of 200 yL.
- Assay curves formed using polystyrene standards were used to derive the values of Mw and Mn.
- the molecular weight (g / mol) of polystyrene standards is 2,000 / 10,000 / 30,000 / 70,000 / 200,000 / 700,000 / 2,000,000 / 4,000,000 /
- the thickness was formed by the T-die method under the following molding conditions.
- the initial viscosity (Mi) was measured at 240 ° C and anoxic conditions using a Discovery Hybrid Rheometer (DHR2, TA Instruments), and then the viscosity (Mf) was stored after storing at 200 ° C for 2000 seconds at 240 ° C.
- the change in rheological properties was observed, and normalized viscosity (Norma 1 i zed viscosity,%) was obtained according to Equation 1 below. The smaller value means that it is advantageous in terms of long-term durability.
- Mf viscosity of the polyolefin-based resin composition measured after storing the polyolefin-based resin composition at 240 ° C. under oxygen conditions for 2000 seconds
- a bale net was prepared using the resin compositions of the above Examples and Comparative Examples. Specifically, the resin compositions according to Examples and Comparative Examples were taken to prepare HDPE films, and then cut to fit the width in the longitudinal direction, and stretched 8 times to produce bale nets. Evaluated according to.
- Bale net can be easily manufactured by drawing
- 1111 is 0.5 for 10/10
- Tensile strengths greater than ⁇ / (] 61 were shown, indicating a significant improvement in mechanical properties.
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Abstract
Description
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EP19770531.2A EP3640294A4 (en) | 2018-03-21 | 2019-03-20 | COMPOSITION OF RESIN BASED ON POLYOLEFIN AND STRETCHABLE FILM USING IT |
BR112020001500-8A BR112020001500B1 (pt) | 2018-03-21 | 2019-03-20 | Composição de resina de poliolefina, método para preparar uma composição de resina de poliolefina e artigo preparado com o uso da composição de resina de poliolefina |
US16/633,468 US11214669B2 (en) | 2018-03-21 | 2019-03-20 | Polyolefin resin composition and stretch film using the same |
CN201980003223.4A CN110809603B (zh) | 2018-03-21 | 2019-03-20 | 聚烯烃树脂组合物和使用其的拉伸膜 |
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US20200172713A1 (en) | 2020-06-04 |
US11214669B2 (en) | 2022-01-04 |
CN110809603A (zh) | 2020-02-18 |
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