WO2000011079A1 - Polypropylene film abd multilayered polypropylene film - Google Patents
Polypropylene film abd multilayered polypropylene film Download PDFInfo
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- WO2000011079A1 WO2000011079A1 PCT/JP1999/004366 JP9904366W WO0011079A1 WO 2000011079 A1 WO2000011079 A1 WO 2000011079A1 JP 9904366 W JP9904366 W JP 9904366W WO 0011079 A1 WO0011079 A1 WO 0011079A1
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- polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08L23/10—Homopolymers or copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
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- 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
- 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
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/14—Copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08L23/16—Ethene-propene or ethene-propene-diene copolymers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31913—Monoolefin polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon
Definitions
- the present invention relates to a polypropylene-based film, a polypropylene-based multilayer film, a self-adhesive film, a self-adhesive multilayer film, and a polypropylene-based multilayer film for high-temperature sterilization packaging.
- the present invention relates to a polypropylene-based multilayer film that has excellent sealing properties and is suitable for packaging foods subjected to high-temperature sterilization.
- Polypropylene has mechanical, optical, and thermal properties, and has excellent packaging suitability, and is therefore widely used in food packaging and daily goods.
- a composition (commonly known as a block copolymer) comprising a copolymer of propylene homopolymer, a copolymer or terpolymer of propylene and ⁇ -olefin and propylene homopolymer, and propylene and ethylene is used.
- a composition commonly known as a block copolymer
- a copolymer of propylene homopolymer a copolymer or terpolymer of propylene and ⁇ -olefin and propylene homopolymer, and propylene and ethylene
- propylene and ethylene used for packaging applications suitable for:
- conventionally known polypropylene films are insufficient in balance of transparency, low-temperature impact resistance, heat sealability, self-adhesiveness, whitening resistance against bending, and an effect of preventing transparency from being lowered after heat treatment.
- propylene homopolymer film is inferior in impact resistance at low temperatures, heat sealability, and self-adhesion.
- the film is difficult to bend and is difficult to bend.
- Films using a copolymer or terpolymer of propylene and Hi-Ichi Refine have excellent transparency and heat sealability, but have low temperature impact resistance and self-adhesion.
- Composition comprising crystalline polypropylene, which does not satisfy the specific intrinsic viscosity ratio and weight ratio, etc., and has poor copolymerization properties, bending resistance to whitening and transparency after heat treatment, and a specific intrinsic viscosity ratio, weight ratio, etc.
- the film using the polymer has excellent impact resistance at low temperatures, it has poor transparency, heat sealability, self-adhesiveness and whitening resistance to bending, and has a problem that fish eyes are easily generated.
- film for retort packaging is a film made of polyolefin, and is subjected to the steam sterilization temperature (at 120 ° C or higher and 140 ° C or higher).
- a polyolefin-based film in which an amorphous ethylene-propylene copolymer is blended with a crystalline propylene-based random copolymer is used.
- films blended with a crystalline propylene random copolymer and an amorphous ethylene-propylene copolymer have the disadvantage of reduced transparency after steam sterilization and the disadvantage of fusing during high temperature steam sterilization.
- a transparent retort packaging film using linear low-density polyethylene has been developed. However, when this film is also subjected to steam sterilization, the film is deformed or fused. Or a problem has occurred.
- a polypropylene or ethylene-propylene random copolymer is used.
- a first layer (ii) a second layer comprising a blend of an ethylene-propylene block copolymer or an ethylene-propylene block copolymer and a polyolefin-based polymer having good compatibility with the rubber component in the block copolymer and (ii) iii)
- a composite film has been proposed in which a third layer made of polypropylene or an ethylene-propylene random copolymer is laminated (Japanese Patent Application Laid-Open No. Sho 62-39050).
- the present invention provides a film having excellent transparency, low-temperature impact resistance, heat-sealing properties, and self-adhesiveness, and also has a whitening resistance to bending and an effect of preventing a decrease in transparency after heat treatment.
- An object of the present invention is to provide a multilayer film which is excellent in impact resistance, heat sealability and self-adhesiveness, and has an effect of preventing bending from whitening and preventing a decrease in transparency after heat treatment.
- the present invention is characterized by the above-mentioned characteristics, and a polypropylene-based film suitably used for various applications, for example, a retort film or a medical film that is subjected to a heat sterilization treatment, a film for a double bag packaging, a film for a box making application, and the like. It is to provide the same multilayer film. Disclosure of the invention
- the present inventors obtain a film that satisfies all of transparency, impact resistance at low temperature, heat-sealing property, self-adhesion, bending hardening whitening property and transparency reduction preventing effect after heat treatment.
- the intrinsic viscosity of the copolymer, the intrinsic viscosity ratio of both components of the crystalline polypropylene and the copolymer, and the intrinsic viscosity of the polypropylene-based composition comprising crystalline polypropylene, propylene and the co-bolymer of If the product of the intrinsic viscosity ratio and the weight ratio of both components is made into a film using a polypropylene-based composition having a certain range, the resulting film will have transparency, low-temperature impact resistance, heat-sealing properties, It has been found that the film is excellent in adhesiveness, has a resistance to bending, is not whitened, and has an effect of preventing a decrease in transparency after heat treatment.In addition, there is little
- a polypropylene-based composition comprising crystalline polypropylene and a copolymer of propylene and ⁇ -olefin, wherein the intrinsic viscosity of the copolymer [7?] R c is 6.5 dlZg or less, and the intrinsic viscosity of the copolymer is [7?]
- the ratio of RC to the intrinsic viscosity [ ⁇ ?] ⁇ of the crystalline polypropylene [7?] RC / [7?] PP is 0.6 to 1.2, and
- W PP and the weight of the copolymer is W RC
- a self-adhesive multilayer film having at least one layer of the film according to the above item 1 in the outermost layer.
- melt flow rate of the polypropylene-based multilayer film for high-temperature sterilization packaging MFR / film (at: 230 ° C) is in the range of 0.5 to 5.0 gZ for 10 minutes.
- Polypropylene-based multilayer film for packaging is in the range of 0.5 to 5.0 gZ for 10 minutes.
- FIG. 1 shows a flow sheet of a continuous polymerization apparatus for producing a polypropylene composition according to the present invention.
- the symbols in the figure represent the following.
- the crystalline polypropylene contains 90% by weight or more, less than 98.5% by weight or more than 99.5% by weight and less than 100% by weight of propylene. ⁇ -refined copolymer.
- the propylene content of the crystalline polypropylene affects mechanical properties such as transparency, heat sealability, heat resistance and rigidity of the obtained film. The smaller the content, the better the transparency and heat sealability. Heat resistance and rigidity are reduced.
- the propylene content is 100% by weight, that is, in the case of a propylene homopolymer, the heat resistance and the rigidity are excellent, but the transparency is remarkably reduced, and the propylene content exceeds 10% by weight.
- Less than 0% by weight of crystalline polypropylene is particularly suitable for applications requiring transparency and heat resistance, such as high-temperature sterilization packaging films.
- crystalline polypropylene having a propylene content of 90% by weight or more and less than 98.5% by weight is particularly suitable for self-adhesive films such as food packaging and industrial stretch films.
- the copolymer of propylene and ⁇ -olefin is preferably a copolymer of propylene and ⁇ -olefin containing 20 to 55% by weight, more preferably 25 to 45% by weight of monoolefin.
- the ⁇ -olefin content of the copolymer affects the transparency, self-adhesiveness, impact resistance at low temperature, whitening resistance against bending, and the effect of preventing transparency reduction after heat treatment of the resulting film. The higher the content, the better the impact resistance at low temperatures. However, if the content is too high, it will affect the dispersibility of the copolymer and the crystalline polypropylene, and the transparency, self-adhesiveness, and bending resistance of the film will decrease.
- Examples of one-component olefins constituting the copolymer include ethylene, 1-butene, 11-pentene, 1-hexene, 1-octene, 1-decene, 1-dedecene, 1-tetradecene, 1-hexadecene, and 1-hexadecene. Octadecene, 1-eicosene, 4-methyl-11-pentene, 3-methyl-1-pentene and the like. These olefins may be used alone or in combination with one or more other olefins. May also be included.
- the copolymer is at 135 ° C having an intrinsic viscosity [77] RC measured in tetralin 6. 5 d lZg less and ultimate the intrinsic viscosity [] PP of crystalline polypropylene was measured under the same conditions Viscosity ratio [??] RC / [??] PP must be in the range 0.6 to L.2.
- the intrinsic viscosity of the copolymer in the composition [77] Since the RC cannot be measured directly, the intrinsic viscosity of crystalline polypropylene that can be measured directly [??] PP and polypropylene intrinsic viscosity of the whole pyrene-based composition [??] wHOLE and the weight% W RC of the copolymer, determined by the following equation (1).
- continuous production means that a crystalline polypropylene is produced in a first step described below (first polymerization step), and then a copolymer of propylene and a-olefin is continuously produced in a second step (first step). 2 polymerization step).
- the intrinsic viscosity of the copolymer [7?] RC particularly affects the processing characteristics (film forming properties and rigidity) of the film, and the intrinsic viscosity ratio of the copolymer to the crystalline polypropylene [77] RC / [77] PP is the crystal of the copolymer Affects dispersibility in water-soluble polypropylene. If the intrinsic viscosity [r?] RC of the copolymer is too large, the film-forming properties of the film will deteriorate and this will be a problem in film production. On the other hand, the intrinsic viscosity ratio with crystalline polypropylene [77] RC / [77] PP is too small, the impact resistance at low temperature is insufficient. If it is too large, transparency, self-adhesiveness, and bending hardening are difficult. The effect of improving the transparency and prevention of the decrease in transparency after the heat treatment is reduced, and the desired properties cannot be achieved.
- the polypropylene-based composition used in the present invention is a product of the weight ratio W PP / W RC of the crystalline polypropylene to the copolymer and the intrinsic viscosity ratio [7?] RC / [ ⁇ ?] PP of the two components described above. ([] RC / [77] pp) It is important that X (Wp P / W RC ) be in the range of 0.2 to 4.5.
- the product of the weight ratio and the intrinsic viscosity ratio is in the above range is that propylene and A plurality of domains composed of a copolymer of fins are dispersed in a state of extending in the flow direction of the composition at the time of molding, or any of the dispersed domains is connected to other domains at at least one place. If the value is within the above range, the resulting film has transparency, self-adhesion, impact resistance at low temperature, whitening resistance to bending, and heat treatment.
- the effect of preventing the transparency from lowering afterwards is good, if the value exceeds the above range, the resulting film will have the effects of improving the desired self-adhesiveness, whitening resistance against bending, and the effect of preventing the transparency from lowering after heat treatment. I cannot get it.
- the melt flow rate (230 ° C., load 21.18 N) of the polypropylene-based composition is preferably 0.1 to 50 g / 10 minutes from the viewpoint of moldability during film formation and appearance of the obtained film. 0.5 to 20 g / 10 min.
- the polypropylene-based composition used in the present invention satisfies the above-mentioned physical properties, that is, a state in which a plurality of domains composed of a copolymer of propylene and Hi-Ichi Refin extend in the flow direction of the composition during molding.
- a specific dispersion structure that is dispersed or that any dispersed domain is connected to other domains at at least one location transparency, impact resistance at low temperatures, and heat sealability are improved. It is suitable as a raw material for producing a film which is excellent, has a hard-to-bend whitening property and an effect of preventing a decrease in transparency after heat treatment.
- the copolymer component is soluble in 80% by weight or more, preferably 85% by weight of xylene at 20 ° C based on the weight of the copolymer component. Contains ingredients.
- 20 ° C xylene-soluble component wt% of said copolymer one component (CXS RC) is 20 ° C xylene-soluble component wt% of homo-mer component can not be measured directly (CXS PP) and propylene-based pro click copolymer composition It can be obtained from the weight percent of xylene-soluble component at 20 ° C (CXS WH0LE ) and the weight percent of one copolymer component (W RC ) of the whole product by the following formula (2).
- the polypropylene composition used in the present invention is manufactured by any method as long as the above properties are satisfied. And, of course, separately prepared crystalline polypropylene used in the present invention. Even if a polypropylene composition is produced by mixing a copolymer of pyrene, propylene and a-lefin using a mixing device, a crystalline polypropylene is produced, and then propylene and a- Copolymers of virgin fins may be produced to produce polypropylene-based compositions continuously.
- the constitutional feature of the method for producing a propylene-based composition used in the present invention is that a stereoregular catalyst comprising a titanium-containing solid catalyst component (A) having a large particle diameter, an organoaluminum compound (B) and an organosilicon compound (C).
- a stereoregular catalyst comprising a titanium-containing solid catalyst component (A) having a large particle diameter, an organoaluminum compound (B) and an organosilicon compound (C).
- crystalline polypropylene is produced in the first step (first polymerization step)
- second step a copolymer of propylene and a-olefin is produced continuously (second polymerization step). That is.
- the titanium-containing solid catalyst component (A) is obtained by supporting a titanium compound on an inorganic carrier such as a magnesium compound, a silica compound or alumina, or an organic carrier such as polystyrene.
- an inorganic carrier such as a magnesium compound, a silica compound or alumina, or an organic carrier such as polystyrene.
- Any known electron-donating compounds such as ethers such as 2-methyl-2-isobutyl-1,3-dimethoxypropane and esters such as di-n-butyl phthalate and diisobutyl phthalate may be used. Anything can be used.
- a magnesium compound monoalcohol solution for example, spraying a magnesium compound monoalcohol solution, partially drying the solid component, and then treating the partially dried solid component with an electron donating compound such as titanium halide and di-n-butyl phthalate.
- an electron donating compound such as titanium halide and di-n-butyl phthalate.
- solid catalyst component JP-a-3-1 19003 publication
- a magnesium compound is dissolved in tetrahydrofuran / alcohol / ⁇ electron donor, T i C 1 4 alone or magnesium alone which was out analysis in combination with electron donor
- a titanium-containing solid catalyst component JP-A-4-103604 obtained by treating the above with a titanium halide and the above electron donating compound.
- the titanium-containing catalyst component (A) has an average particle size of 25 to 300 m, preferably 30 to 150 / zm.
- the average particle diameter of the titanium-containing catalyst component (A) is 25 nm or less, the fluidity of the produced powdery polypropylene-based composition, that is, the powder fluidity is significantly impaired, and the vessel wall of the polymerization vessel and the stirring blade Contamination of the polymerization system due to the adhesion of the polypropylene-based composition to the material, etc., and difficulty in transporting the powder discharged from the polymerization vessel. And hinder stable operation.
- the titanium-containing catalyst component (A) preferably has a uniformity in a normal distribution of 2.0 or less. If the degree of uniformity exceeds 2.0, the powder flowability of the resulting powdery polypropylene-based composition will deteriorate, making continuous stable operation difficult.
- the organic aluminum compound (B) represented by the following formula (1) can be used. Specific examples include trimethylaluminum, triethylaluminum, tri-n-butylaluminum, and tri-n-butyl.
- organoaluminum compounds can be used alone or as a mixture of two or more.
- organic silicon compound (C) a compound represented by the general formula R 2 X R 3 Y Si (OR 4 ) z (wherein R 2 and R 4 are a hydrocarbon group, and R 3 is a hydrocarbon group or a hetero atom)
- R 2 and R 4 are a hydrocarbon group, and R 3 is a hydrocarbon group or a hetero atom
- An organic silicon compound represented by 0 ⁇ X ⁇ 2, 1 ⁇ Y ⁇ 3, 1 ⁇ Z ⁇ 3 and X + Y + Z-4) is used.
- diisobutyldimethoxysilane diisopropyldimethoxysilane, di-tert-butyldimethoxysilane, cyclohexylmethyldimethoxysilane and diphenyldimethoxysilane are used.
- organic silicon compounds can be used alone or as a mixture of two or more.
- the stereoregular catalyst obtained by combining the titanium-containing solid catalyst component (A), the organoaluminum compound (B) and, if necessary, the organosilicon compound (C) is used in the propylene polymerization in the first polymerization step.
- the titanium-containing solid catalyst (A) is preferably used as a catalyst which has been pre-activated by pre-reacting ⁇ -refined olefin.
- the amount of the organoaluminum compound ( ⁇ ') is not particularly limited, but is usually based on 1 mol of titanium atoms in the titanium-containing solid catalyst component.
- freerefin is added to titanium-containing solid catalyst component (A) at a temperature of 10 to 80 ° C. for 10 minutes to 48 hours.
- the organosilicon compound (C ') may be used in advance in an amount of 0.01 to 10 mol, preferably 0.05 to 5 mol, per 1 mol of the organic aluminum compound. Good.
- organoaluminum ( ⁇ ′) used in the preactivation treatment examples include the above-mentioned organoaluminum ( ⁇ ) used in the main polymerization.
- organic aluminum compound ( ⁇ ′) the same or different organic aluminum compound ( ⁇ ) used in the main polymerization can be used.
- triethyl aluminum is used.
- organic silicon compound (C ′) used as necessary in the preactivation treatment the same kind as the above-mentioned organic silicon compound (C) can be exemplified.
- organic silicon compound (C) the same kind as the organic silicon compound (C) used in the main polymerization or a different one can be used.
- the ⁇ -olefin used in the preactivation treatment of the titanium-containing solid catalyst component (A) is ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, —Dodecene, 1-tetradecene, 1-hexadecene, 1-octanedecene, 1-eicosene, 4-methyl-1-pentene, 3-methyl-1-pentene, etc.
- These olefins may contain not only one kind but also one kind or a mixture of two or more kinds of other olefins.
- a molecular weight regulator such as hydrogen can be used in combination to regulate the molecular weight of the polymer during the polymerization.
- the inert solvent used for the pre-activation treatment of the titanium-containing solid catalyst component ( ⁇ ) is silicon having a structure of liquid saturated hydrocarbon such as hexane, heptane, octane, decane, dodecane, liquid paraffin, or dimethylpolysiloxane. It is an inert solvent that does not significantly affect the polymerization reaction such as oil. These inert solvents may be either a single solvent alone or a mixture of two or more solvents.
- propylene or a small amount of ⁇ -olefin is polymerized in the gas phase to produce crystalline polypropylene.
- a polymerization step, and then a second polymerization step for producing a copolymer of propylene and ⁇ -olefin by continuously copolymerizing propylene and monoolefin in the presence of the crystalline polypropylene are continuously carried out.
- the first polymerization step is not limited to the gas phase polymerization method, and a slurry polymerization method or a bulk polymerization method may be adopted, but it is preferable that the second polymerization step following the polymerization step is a gas phase polymerization method. For this reason, it is preferable that the first polymerization step also employs a gas phase polymerization method. If a slurry polymerization method or a bulk polymerization method is employed as the second polymerization step, the resulting copolymer elutes into the solution, making it difficult to maintain stable operation.
- the polymerization conditions for crystalline polypropylene differ depending on the polymerization mode.
- a titanium-containing solid catalyst component (A) which is pre-activated with a certain amount of powdered polypropylene-based composition mixed and stirred
- a stereoregular catalyst consisting of an organoaluminum component (B) and an organosilicon compound (C)
- the polymerization temperature is 20 to 120 ° C, preferably 40 to: L 00 ° C
- the polymerization pressure is atmospheric pressure to 9 9 MPa, preferably 0.59 to 5.
- Propylene or propylene and a small amount of ⁇ -olefin are supplied and polymerized under the conditions of OMPa to produce crystalline polypropylene.
- the number of moles of the titanium-containing solid catalyst component (A) substantially means the number of Ti gram atoms in the titanium-containing solid catalyst component (A).
- a molecular weight modifier such as hydrogen can be used at the time of polymerization, and it is carried out so that the intrinsic viscosity of the crystalline polypropylene satisfies the requirements of the present invention.
- a part of the produced powdery polymer is extracted and used for measurement of intrinsic viscosity, melt flow rate, and polymerization yield per unit weight of catalyst.
- a second polymerization step is performed in which a mixed monomer of propylene and ⁇ -olefin is copolymerized to form a copolymer of propylene and olefin.
- the content of monoolefin in the copolymer is controlled by controlling the gas molar ratio of the monomer of monomer and propylene in the monomer gas so that the content of ⁇ -olefin in the copolymer is 25 to 55% by weight. I do.
- the weight of the copolymer with respect to the weight of the crystalline polypropylene can be reduced to 10 to 50% by weight by adjusting the polymerization time or using a polymerization activity regulator of a catalyst such as carbon monoxide or hydrogen sulfide. Adjust to be.
- the molecular weight of the copolymer is adjusted during the copolymerization of the copolymer by adding a molecular weight modifier such as hydrogen so that the intrinsic viscosity of the copolymer meets the requirements of the polypropylene-based composition used in the present invention.
- the hydrogen is supplied in such a manner that the obtained polypropylene composition satisfies the requirements of the present invention.
- any of a batch system, a semi-continuous system and a continuous system can be employed, but a continuous polymerization system is preferred from an industrial viewpoint.
- the monomer can be removed from the polymerization system to obtain a powdery polypropylene-based composition.
- a part of the obtained polypropylene-based composition is used for measurement of intrinsic viscosity, measurement of ⁇ -refined content, and measurement of polymerization yield per unit weight of catalyst.
- the polypropylene-based composition used in the present invention contains antioxidants, neutralizing agents, weathering agents, inorganic fillers, lubricants, anti-blocking agents, antistatic agents which are usually used for polyolefins.
- Agents, anti-fogging agents and the like can be added.
- the antioxidant include phenol-based antioxidants and phosphorus-based antioxidants
- the neutralizer include higher fatty acid salts such as calcium stearate.
- the inorganic filler and the antiblocking agent include calcium carbonate.
- the method of blending the polypropylene composition with each of the above stabilizers is a method of blending with a conventional blending device such as a mixer equipped with a high-speed stirrer such as Henschel Mixer-1 (trade name), a repump blender and a tumbler mixer-1. And the usual single-screw extrusion And a method of pelletizing using a twin-screw extruder or the like.
- a conventional blending device such as a mixer equipped with a high-speed stirrer such as Henschel Mixer-1 (trade name), a repump blender and a tumbler mixer-1.
- Henschel Mixer-1 trade name
- a repump blender a repump blender
- tumbler mixer-1 tumbler mixer-1
- the polypropylene film and the self-adhesive film of the present invention are unstretched or stretched (uniaxially stretched or biaxially stretched) films using a polypropylene composition.
- Examples of the method for producing the film include a T-dye method and an inflation method which are generally used for producing a polyolefin film.
- Examples of the stretching method include a sequential biaxial stretching method using a tenter method and a simultaneous biaxial stretching method using a tubular method. A stretching method can be exemplified.
- the polypropylene-based multilayer film and the self-adhesive multilayer film of the present invention are unstretched or stretched (uniaxially stretched, biaxially stretched) multilayer films using at least one layer using the polypropylene-based composition
- Layer Z using the polypropylene composition / layer using the thermoplastic resin (1) or (2) that is, a multilayer film of two or three layers or three or three layers.
- the distinction between the thermoplastic resins (1) and (2) indicates that different thermoplastic resins are used.
- the thermoplastic resin referred to herein is a high-density polyethylene, a low-density polyethylene, a linear low-density polyethylene, a polypropylene, an ⁇ -polyolefin such as a propylene- ⁇ -olefin polymer, a poly-4-methyl-pentene-1, or the like.
- examples include olefin elastomers such as ethylene-propylene elastomer and ethylene-butene elastomer, styrene elastomers such as nylon, polyethylene terephthalate, polyvinyl acetate, polyvinyl alcohol, and styrene-butadiene-styrene. be able to.
- a modified polyolefin resin layer such as chlorinated polypropylene between the two layers for the purpose of enhancing the adhesiveness between the propylene-based composition layer and the thermoplastic resin layer within a range not impairing the object of the present invention
- a blend of a thermoplastic resin with a polypropylene-based composition can also be used.
- the total thickness of the multilayer film is not particularly limited, it is preferably from 8 to 100 m, more preferably from 10 to 70 m, from the viewpoint of film formability.
- the thickness of each layer of the multilayer film is not particularly limited, either, but in terms of transparency, impact resistance at a low temperature, whitening resistance to bending, and an effect of preventing a decrease in transparency after heat treatment, the total thickness of the multilayer film is considered.
- the ratio of the thickness of the layer using the polypropylene composition is preferably 10 to 90%, more preferably 20 to 80%.
- Examples of the method for producing the multilayer film include a multilayer extrusion method, a dry laminating method, and an extrusion laminating method.
- Examples of the multilayer extrusion method include a T-die method and an inflation method generally used for producing a polyolefin film.
- Examples of the stretching method include a sequential biaxial stretching method using a tenter method and a simultaneous biaxial stretching method using a tubular method.
- melt flow rate (MFR) of the polypropylene-based composition and the thermoplastic resin constituting each layer is not particularly limited, but the moldability of the film and the in terms of the finished film appearance, the polypropylene composition MFR (MFR a) and the thermoplastic resin MFR (MFR a)
- MFR A ZMFR B is preferably from 0 to 10;
- the preferred embodiment of the film MFR (MFR / fil m) of the polypropylene-based multilayer film of the present invention is in terms of the moldability of the film and the appearance of the finished polypropylene-based multilayer film and the sealing strength when sealing the contents. (Sealing)
- 0.5-5.0 gZl in the range of 0 minutes, preferably 1.0-5.0 g / 10 minutes.
- the haze value (HAZE / after) of the film after steam high-temperature sterilization at 120 ° C or higher and lower than 140 ° C and the film before steam sterilization is less than 5%, preferably less than 3%. If the haze difference is 5% or more, the transparency of the film is remarkably inferior and the contents become difficult to see.
- the film or multilayer film obtained in the present invention is suitable for printing and laminating.
- Surface treatment such as corona discharge treatment, flame treatment, plasma treatment, etc., can be performed by a method that is usually employed industrially for the purpose of imparting water vapor deposition properties, metal deposition characteristics, and promoting the transfer of antistatic agents to the film surface.
- Intrinsic viscosity (unit; d 1 / g): Automatic viscosity meter (AVS2, Mitsui Toatsu Co., Ltd.) using tetralin (tetrafluoroethylene naphthylene) as a solvent at 135 ° C. was used for the measurement.
- Particle size (unit; / m) and uniformity of the titanium-containing solid catalyst component (I) The average particle size calculated from the particle size distribution measured using Master Sizer-1 (manufactured by MALVERN) is defined as the particle size; The value obtained by dividing the particle size under the 60% sieve by the particle size under the 10% sieve was defined as the uniformity.
- Liquid nitrogen was introduced into the spray tower for cooling, and the temperature in the tower was maintained at 15 ° C.
- the product was collected in cold hexane introduced into the bottom of the column to obtain 256 g. From the product analysis, the composition of this carrier was determined to be the same as the starting solution with MgCl 2 .6 Et ⁇ H.
- the carrier obtained above is sieved to obtain a spherical carrier 2 having a particle size of 45 to 2 12 m. 05 g was obtained.
- the resulting carrier is dried by aeration at room temperature for 181 hours using nitrogen at a flow rate of 3 liters (standard condition of gas at 0 ° C, 1 atm) / min to dry MgCl 2 ⁇ 1.7 Et ⁇ H.
- a carrier was obtained.
- the average particle size of the obtained titanium-containing solid catalyst component (I) was 115 m, and the analyzed values were 19.5% by weight of Mg, 1.6% by weight of Ti, 59.0% by weight of C1 and 4.5% by weight of diisobutyl phthalate. . 2) Pre-activation treatment of titanium-containing solid catalyst component (I)
- the pre-activated titanium-containing solid catalyst component was added at 0.5 g / hr to an organoaluminum compound (II).
- organoaluminum compound (II) was continuously supplied with triethylaluminum and diisopropyldimethoxysilane as the organosilicon compound (III).
- Propylene is continuously supplied so as to maintain the reaction temperature of 70 ° C, reaction pressure of 2.5 MPa, and stirring speed of 40 rpm, and hydrogen gas is continuously supplied from circulation pipe 2 to adjust the molecular weight of the obtained crystalline polypropylene.
- hydrogen gas is continuously supplied from circulation pipe 2 to adjust the molecular weight of the obtained crystalline polypropylene.
- the intrinsic viscosity of the produced polymer was controlled.
- Reaction heat was removed by the heat of vaporization of the raw material propylene monomer supplied from the pipe 3.
- the unreacted gas discharged from the polymerization reactor 1 was cooled and condensed outside the reactor system through the pipe 4 and returned to the polymerization reactor 1.
- the crystalline polypropylene obtained in the main polymerization reactor 1 is continuously withdrawn from the polymerization reactor 1 through the pipe 5 so that the polymer holding level is 50% by volume of the reaction volume. Feeded to 10. At this time, a portion of the crystalline polypropylene obtained from the pipe 5 was intermittently extracted, and the intrinsic viscosity and the Mg content in the polymer were measured by high frequency inductively coupled plasma emission spectroscopy (ICP method). The sample from which the polymer yield was determined was used.
- ICP method inductively coupled plasma emission spectroscopy
- L ZD 6, internal volume 100 liters
- ethylene and propylene were supplied.
- the reaction conditions were such that the stirring unit was 40 ⁇ ⁇ ⁇ , the temperature was 60 ° C, the pressure was 2.1 MPa, and the ethylene unit content in the copolymer component was adjusted by the molar ratio of ethylene Z propylene in the gas phase.
- Carbon monoxide was supplied as a polymerization activity inhibitor to control the polymerization amount of the copolymer component, and hydrogen gas was supplied from a pipe 7 to control the molecular weight of one component of the copolymer.
- the unreacted gas discharged from the polymerization reactor 10 was cooled and condensed outside the reactor system through the pipe 8 and returned to the present copolymerization step.
- the produced polypropylene-based composition was withdrawn from the polymerization vessel 10 through the pipe 9 so that the level of the polymer held was 50% by volume of the reaction volume.
- the production rate of the obtained polypropylene composition was 8 to 12 kg / hr.
- the extracted polypropylene-based composition removes unreacted monomers, partially measures the intrinsic viscosity, measuring ethylene in the copolymer component by infrared rays, and measuring the M in the polymer to determine the polymerization ratio of the copolymer component.
- the g component was subjected to measurement by high-frequency inductively coupled plasma emission spectroscopy (ICF method). Next, methods for evaluating the films obtained in the examples and comparative examples are described below.
- Transparency (unit:%): The haze of the film was measured in accordance with ASTM D 1003 and used as a standard for transparency. The smaller the value, the better the transparency.
- the temperature at which the strength is 0.5 [J] or less and at which brittle fracture occurs is used as an index of impact resistance. The lower the temperature, the better the impact resistance at low temperatures.
- Heat sealing temperature (unit: C): Dry lamination using a biaxially oriented polypropylene film (20i) and an adhesive, and the laminated film is subjected to a sealing temperature of 130 ° C to 190 ° C. After a 10 mm wide heat seal with a seal pressure of 2 MPa and a seal time of 0.5 seconds at intervals of 5 (total of 8 temperature conditions) in the range of 5, each sample was cut out into a 15 mm wide strip. A 90-degree peel test of the seal portion at the seal temperature was measured by a tensile tester at a bow I tension speed of 30 OmmZmin, and the lowest temperature showing a peel strength of 5 N / 15 mm or more was defined as the heat seal temperature. The lower the temperature, the better the heat sealability.
- Heat resistance (unit: C): A sample cut out from a multilayer film into a strip of 10 x 100 bandages was held in a silicone oil bath set at a predetermined temperature for 10 minutes, and then the length in the longitudinal direction was measured. The temperature at which the shrinkage length relative to the initial length expressed as a percentage exceeds 2% was taken as an index of heat resistance. The higher the temperature, the better the heat resistance.
- the obtained multilayer film was subjected to a pressurized steam treatment at 135 ° C, a pressure of 0.25 Pa, and 1 Omin using a 500 high-temperature sterilizing apparatus.
- Bleach resistance to whitening The film was folded 180 ° by hand five times at 180 ° by hand, and the whitening was visually observed. If no whitening was observed, ⁇ indicates that whitening is slightly observed. ⁇ , X when whitening was observed.
- Example 1 The pellets obtained in Example 1 are referred to as BC-1, the pellets obtained in Examples 2 to 9 are referred to as BC_2 to BC-9, respectively, and the pellets obtained in Comparative Example 1 are referred to as BC-1.
- the pellets obtained in Comparative Examples 2 to 7 were designated as BC-11 to BC-16, respectively.
- Comparative Example 1 where the intrinsic viscosity [77] R (; of the copolymer is larger than the range of the present invention, film formation cannot be performed, and the product of the intrinsic viscosity ratio of the copolymer and the crystalline polypropylene and the weight ratio ([77 ] RC / [7?] PP ) X (W PP WW RC ) is larger than the range of the present invention, the comparative example 2 has poor bending hardening whitening property, and the effect of preventing the decrease in transparency after heat treatment is insufficient. You can see that.
- Example 10- using a three-type three-layer extruder equipped with a multi-layer T-die (one single-screw extruder for the middle layer with a diameter of 65 band ⁇ and two single-screw extruders for the surface layer with a diameter of 5 ⁇ )
- a three-type three-layer extruder equipped with a multi-layer T-die one single-screw extruder for the middle layer with a diameter of 65 band ⁇ and two single-screw extruders for the surface layer with a diameter of 5 ⁇
- RPP ethylene-propylene random copolymer
- the layer using the polypropylene composition having the properties within the scope of the present invention is used in at least one layer of the multilayer film, transparency, impact resistance at low temperature, It can be seen that a multilayer film having excellent heat sealing properties, and an excellent effect of improving force, bending resistance to whitening, and prevention of deterioration in transparency after heat treatment can be obtained.
- Example 14 The pellets obtained in Example 14 were abbreviated as BC-17, the pellets obtained in Example 15 were abbreviated as BC-18, and the pellets obtained in Examples 16 to 22 were abbreviated as BC-19 to 25, respectively.
- the pellets obtained in Comparative Example 12 are referred to as BC-26, and the pellets obtained in Comparative Examples 13-18 are hereinafter abbreviated as BC-27 to 32, respectively.
- each of the obtained pellets of BC-17 to BC-32 was extruded at an extrusion temperature of 250 ° C, respectively, and the air was cooled.
- the film was quenched rapidly with a cooling roll having a surface temperature of 30 ° C. and a film having a thickness of 15 was obtained.
- Each of the obtained films was evaluated by the above evaluation method, and the results are shown in Tables 4 and 5 described below.
- the copolymer is composed of crystalline polypropylene and a copolymer of propylene and ethylene, and has an intrinsic viscosity [] RC of 6.5 dlZg or less, and an intrinsic viscosity ["] RC of the copolymer.
- Comparative Example 12 where the intrinsic viscosity [ ⁇ ?] RC of the copolymer was larger than the range of the invention, the film could not be formed, and the intrinsic viscosity ratio and the weight ratio of the copolymer and the crystalline polypropylene were different. It can be seen that Comparative Example 13 in which the product ([7?] R (; / [7?] PP ) X (W PP ZW R ( ;)) is larger than the range of the invention does not have self-adhesiveness.
- Comparative Example 16 in which the propylene content in the crystalline polypropylene was larger than the range of the invention, the heat sealability was poor, and in Comparative Examples 17 and 18 in which the copolymer had an ethylene content out of the range of the invention, the temperature was low. It can be seen that the impact resistance was poor and the transparency was impaired.
- LLDPE ethylene-propylene random copolymer
- the film layer using the polypropylene composition within the scope of the present invention is used for at least one of the surface layers of the multilayer film, the obtained multilayer film has transparency and low temperature. It can be seen that is excellent in impact resistance, heat sealability, and self-adhesion.
- a propylene block copolymer composition (BC-33 to BC-40) shown in Table 7 and tetrakis [methylene (3,5-di-t-butyl_4-hydroxyphenyl) were used.
- Propionate] Methane 0.03% by weight, Tris (2,4-di-t-butylphenyl) phosphite 0.08% by weight and calcium stearate 0.1% by weight mixed with Henschel mixer (trade name) The mixture was melt-kneaded at 200 ° C using a (diameter of 40 ⁇ ) and pelletized.
- the material used for the skin layer is a propylene-based polymer (PP-1: a propylene homopolymer having a density of 0.90 g / cm 3 , a crystal melting point of 163 ° C, and an MFR of 7.0 g / 10 minutes) 99.79 weight % And tetrakis [methylene (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane 0.03% by weight, tris (2,4-di-t-butylphenyl) phosphite 0.08% by weight And 0.1% by weight of calcium stearate were mixed with a Henschel mixer (trade name), melt-kneaded at 200 ° C. using a single screw extruder (diameter: 4 4 ⁇ ), and pelletized.
- PP-1 a propylene homopolymer having a density of 0.90 g / cm 3 , a crystal melting point of 163 ° C, and an MFR of
- the propylene block copolymer described above was used using a three-layer, three-layer extruder equipped with a multi-layer die (one single-screw extruder with a diameter of 65 mm ⁇ and two single-screw extruders with a diameter of 50 mm ⁇ ).
- the pellets (AA) composed of the composition and the additives and the pellets (BB) composed of the propylene-based polymer and the additives are supplied to separate extruders and melted at 230 ° C.
- the material used for the skin layer is a propylene-based polymer (PP-2: propylene having a density of 0.90 g / cm 3 , a crystal melting point of 150 ° C, an MFR of 6.0 g / 10 min, and an ethylene content of 2.5% by weight.
- PP-2 propylene-based polymer having a density of 0.90 g / cm 3 , a crystal melting point of 150 ° C, an MFR of 6.0 g / 10 min, and an ethylene content of 2.5% by weight.
- the above propylene-based block copolymer composition was obtained using a three-type three-layer extruder equipped with a multilayer T die (one single-screw extruder with a diameter of 65 mm and two single-screw extruders with the same diameter of 5 mm).
- Pellets ( ⁇ ) consisting of propylene-based polymer and additives These pellets (BB) are fed to separate extruders, melted at 230, co-extruded, cooled and solidified with an air chamber and a cooling roll with a surface temperature of 30 ° C to obtain a thickness of 70.
- a two-layer three-layer unstretched film was obtained.
- propylene polymer (PP-1) 99.79% by weight and tetrakis [methylene (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane each as a material used for the skin layer.
- PP-1 propylene polymer
- tetrakis [methylene (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane each as a material used for the skin layer.
- the mixture was melt-kneaded with C and pelletized.
- the propylene block copolymer described above was used using a three-type, three-layer extruder equipped with a multi-layer T die (one single-screw extruder with a diameter of 65 mm ⁇ and two single-screw extruders with a diameter of 50 mm ⁇ ).
- Pellets (AA) consisting of composition and additives and propylene polymer and additives Each pellet (BB) is fed to a separate extruder, melted at 230 ° C, co-extruded, and solidified by cooling with an air chamber and a cooling roll with a surface temperature of 30 ° C. 2)
- the thickness composition ratio of the multilayer film was formed as shown in Table 12.
- the propylene-based block copolymer composition (BC-41) shown in Table 8 was used as the material used for the core layer, and the thickness composition ratio of the multilayer film was formed as in Table 12 except that the film formation was performed as shown in Table 12. Performed in the same manner as in Example 42 to obtain a two-layer, three-layer unstretched film. The obtained two-type three-layer unstretched films were evaluated, and the results are shown in Table 12 below.
- Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Polypropylene-based composition BC-1 BC-2 BC-3 BC-4 BC-5 BC-6 BC -7 BC-8 BC-9 Crystalline polypropylene
- Example W Example 15 Example J6 Example 17 Example ⁇ Example Example 20 Example 21 Example 22 Polypropylene-based composition BC-17 BC— BC— ⁇ ? BC-20 BC-2 / BC-22 BC — '23 Bc-2 BC-25 Crystalline horifurohylene
- Wp P / W RC 1.0 2.0 3.0 4.0 2.0 2.0 2.0 2.0 3.0
- Ethylene content [% by weight] 36 36 36 36 36 25 20 64
- Block copolymer composition BC-33 B c -33 M C-BC-BC— ⁇ ⁇ is ⁇
- Skin layer Core layer: Skin layer 10:50:10 18:34:18 15:40:15 3: 64: 3
- the film according to claims 1 to 7 of the present invention is excellent in transparency, low-temperature impact resistance, heat sealability, self-adhesiveness, whitening resistance to bending, and an effect of preventing a decrease in transparency after heat treatment.
- the multilayer film exhibits the effect of having transparency, heat resistance, impact resistance at low temperatures, heat sealability, self-adhesiveness, bending resistance to whitening, and prevention of deterioration in transparency after heat treatment. . Therefore, the polypropylene-based film and the multilayer film of the present invention can be suitably used for various applications, for example, heat-sterilized retort film, medical film, double-bag packaging film, film for surface-making use, and the like. .
- the multilayer film according to claims 8 to 11 of the present invention is a multilayer film having an excellent balance of heat resistance, impact resistance at low temperatures, sealing property of contents, and transparency, and is used for high-temperature sterilization packaging. It can be suitably used as a multilayer film.
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Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/762,711 US6511755B1 (en) | 1998-08-21 | 1999-08-12 | Polypropylene film and multilayered polypropylene film |
| DE19983451T DE19983451B4 (de) | 1998-08-21 | 1999-08-12 | Polypropylen-Folie und deren Verwendung |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10/235364 | 1998-08-21 | ||
| JP23536498 | 1998-08-21 | ||
| JP23701298 | 1998-08-24 | ||
| JP10/237012 | 1998-08-24 | ||
| JP10/245607 | 1998-08-31 | ||
| JP24560798 | 1998-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000011079A1 true WO2000011079A1 (en) | 2000-03-02 |
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ID=27332253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1999/004366 Ceased WO2000011079A1 (en) | 1998-08-21 | 1999-08-12 | Polypropylene film abd multilayered polypropylene film |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6511755B1 (ja) |
| KR (1) | KR100404499B1 (ja) |
| DE (1) | DE19983451B4 (ja) |
| TW (1) | TW564254B (ja) |
| WO (1) | WO2000011079A1 (ja) |
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| PL2049333T3 (pl) | 2006-06-14 | 2013-07-31 | Avery Dennison Corp | Łatwo dopasowujące się i nadające się do sztancowania zorientowane wzdłużnie materiały do produkcji etykiet, i etykiety oraz sposób ich otrzymywania |
| EP2035226A2 (en) | 2006-06-20 | 2009-03-18 | Avery Dennison Corporation | Multilayered polymeric film for hot melt adhesive labeling and label stock and label thereof |
| EP2022824A1 (en) | 2007-08-08 | 2009-02-11 | Borealis Technology Oy | Sterilisable and Tough Impact Polypropylene Composition |
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| WO2009073685A1 (en) * | 2007-12-05 | 2009-06-11 | Dow Global Technologies Inc. | Polypropylene melt-blown sealant films for retort packaging |
| CA2723110C (en) * | 2008-05-02 | 2017-09-12 | Treofan Germany Gmbh & Co. Kg | Microporous multi-layer membrane film based on polypropylene for batteries with a cut-off function |
| US8653198B2 (en) * | 2009-03-26 | 2014-02-18 | Fina Technology, Inc. | Method for the preparation of a heterophasic copolymer and uses thereof |
| JP2010272029A (ja) * | 2009-05-22 | 2010-12-02 | Sanyo Electric Co Ltd | アクセス制御回路 |
| US9676532B2 (en) | 2012-08-15 | 2017-06-13 | Avery Dennison Corporation | Packaging reclosure label for high alcohol content products |
| KR101501835B1 (ko) * | 2013-08-13 | 2015-03-12 | 삼성토탈 주식회사 | 내백화성 및 내충격성이 우수한 폴리프로필렌 수지 조성물 |
| WO2015187646A1 (en) | 2014-06-02 | 2015-12-10 | Avery Dennison Corporation | Films with enhanced scuff resistance, clarity, and conformability |
| EP2965908B1 (en) * | 2014-07-09 | 2018-03-21 | Borealis AG | Propylene random copolymer for film applications |
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| WO2001060909A1 (en) * | 2000-02-15 | 2001-08-23 | Moplefan S.P.A. | Gamma radiation sterilizable multilayer films |
| JP2002036473A (ja) * | 2000-07-28 | 2002-02-05 | Chisso Corp | ポリプロピレン系押出ラミネートフィルム |
| JP2002210873A (ja) * | 2001-01-16 | 2002-07-31 | Shin Etsu Polymer Co Ltd | 食品包装用フィルム |
| KR20020077193A (ko) * | 2001-03-30 | 2002-10-11 | 스미또모 가가꾸 고오교오 가부시끼가이샤 | 폴리프로필렌계 수지 조성물, 그의 제조 방법 및 그를함유하는 연신필름 |
| JP2003096251A (ja) * | 2001-09-20 | 2003-04-03 | Grand Polymer Co Ltd | プロピレン系重合体組成物、フィルムおよびその用途 |
| JP2007509206A (ja) * | 2003-10-17 | 2007-04-12 | バクスター・インターナショナル・インコーポレイテッド | 高衝撃強度フィルムおよび塩化ビニルを含まない容器およびポーチおよびオーバーポーチ |
| JP2006035516A (ja) * | 2004-07-23 | 2006-02-09 | Japan Polypropylene Corp | ポリプロピレン系積層フィルム |
| JP2006152068A (ja) * | 2004-11-26 | 2006-06-15 | Mitsui Chemicals Inc | ポリプロピレンシートおよびフィルム |
| JP2011111460A (ja) * | 2009-11-22 | 2011-06-09 | Japan Polypropylene Corp | 加熱殺菌処理食品の包装フィルム用ポリプロピレン系樹脂組成物、及びそれを用いて得られる加熱殺菌処理食品の包装用フィルム |
| JP2022143936A (ja) * | 2021-03-18 | 2022-10-03 | 株式会社プライムポリマー | ポリプロピレン系樹脂組成物および成形体 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010079677A (ko) | 2001-08-22 |
| DE19983451B4 (de) | 2009-09-24 |
| TW564254B (en) | 2003-12-01 |
| US6511755B1 (en) | 2003-01-28 |
| DE19983451T1 (de) | 2001-07-12 |
| KR100404499B1 (ko) | 2003-11-05 |
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