WO1999051665A1 - film perméable au gaz - Google Patents
film perméable au gaz Download PDFInfo
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- WO1999051665A1 WO1999051665A1 PCT/JP1999/001761 JP9901761W WO9951665A1 WO 1999051665 A1 WO1999051665 A1 WO 1999051665A1 JP 9901761 W JP9901761 W JP 9901761W WO 9951665 A1 WO9951665 A1 WO 9951665A1
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- WIPO (PCT)
- Prior art keywords
- propylene
- film
- component
- ethylene
- resin composition
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Classifications
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
-
- 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
-
- 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—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
-
- 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
-
- 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
- C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
-
- 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
- C08L23/12—Polypropene
-
- 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
- C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
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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
-
- 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
Definitions
- the present invention relates to a film having good gas permeability. More specifically, the present invention relates to a film that can be used as a packaging material for fruits and vegetables such as vegetables and fruits, which are required to have a capability of suitably transmitting gas such as water vapor, oxygen, and ethylene.
- plastic films are often used for food packaging, textile packaging, and the like.
- a typical polyolefin film at least a uniaxially stretched polypropylene film (hereinafter sometimes abbreviated as a stretched PP film) has excellent transparency and gloss, and has high mechanical strength. Therefore, it is widely used as a packaging material because of its excellent printing processability, bag making processability and filling workability.
- Ethylene gas generated from vegetables and fruits and other fruits and vegetables themselves is responsible for the breathing.
- a film containing a porous structure such as activated carbon and Oyaishi as a packaging film that can suppress the aging and decay of fruits and vegetables due to the generation of ethylene gas and maintain the freshness of the fruits and vegetables etc
- These utilize the adsorption action of the porous structure, which absorbs the ethylene gas generated by the fruits and vegetables and fixes them in the film, thereby suppressing the respiration of the fruits and vegetables themselves. It is a thing.
- these porous structures have a limited adsorption capacity.For example, once water is adsorbed and the adsorption capacity of the structure reaches near saturation, the ethylene removal ability is greatly reduced.
- porous structure that once adsorbs ethylene regenerates part of the adsorbed ethylene in an environment with excessive water content.
- a packaging film it could not be said that the film had a sufficiently satisfactory freshness retaining ability.
- fruits and vegetables are said to lose their merchantability when they lose more than 5% of water, and it is also necessary to moderately control the evaporation of water to maintain their freshness.
- excessive humidification and condensation can also cause spoilage of packaged fruits and vegetables.
- Packaging films are required to have a high degree of transparency in order to appeal to sellers through the film, such as the freshness of inclusions, and to be examined by consumers. A film containing a porous structure is inevitably reduced in transparency because of containing this structure.
- the stretched polypropylene film that is distributed in the packaging of fruits and vegetables can prevent condensation by mixing the film with a drip-proof agent without properly controlling the evaporation of water vapor, or by using water vapor, oxygen,
- the film is actually used to make holes in the film in the process of packaging to ventilate carbon and other materials.
- the present invention has been made in view of the drawbacks of the above-mentioned stretched PP film, and a purpose thereof is to provide a film suitable for packaging of fruits and vegetables, and to provide a physiological action of fruits and vegetables.
- the purpose is to propose a film that can control the relevant gas and moderately suppress transpiration.
- the present inventors have conducted intensive studies to achieve the above object.
- the film was a single-layer or multilayer film having a film thickness [Di] of 10 100 m, and (1) water vapor permeability [TH 2 O ] (According to JIS Z-0208), (2) Oxygen gas permeability [T 2 ] (according to JIS K-7126A), and (3) Ethylene gas permeability [ ⁇ ] (JIS ⁇ -7126A)
- the present inventors have found that films having the following ranges have excellent performance, and have completed the present invention.
- the first of the present invention is a gas permeable film having the above three types of gas permeability in a well-balanced manner.
- a second aspect of the present invention is a propylene-based resin composition having a propylene polymer component and a copolymer component of ethylene and propylene, wherein the ratio of the intrinsic viscosity of the propylene polymer component to the copolymer component, and the weight ratio thereof are specified.
- Water vapor permeability [T H20 ] (based on JIS Z-0208), (2) Oxygen gas permeability [T 2 ] (based on JIS K-7126A), and (3) Ethylene gas permeability [ T] (based on JIS K-7126A) are films in the following ranges.
- a third aspect of the present invention is a propylene polymer component and propylene containing a copolymer component of ethylene and propylene. What is the content [W PP ] of the propylene polymer component of 9330% by weight and the content of the copolymer component [W RC ] based on the weight of the composition?
- intrinsic viscosity of one copolymer component [] RC is 1.5 3.0dl / g
- the ratio of intrinsic viscosity of copolymer component to PP ([7?] Rc / [77] PP) is 0.5
- the present invention provides a propylene-based resin composition comprising a propylene polymer component and a copolymer component of ethylene and propylene.
- the content of the propylene polymer component [W PP ] is 9330% by weight, and the content of the copolymer component [W RC ] is?
- Intrinsic viscosity of copolymer component [77] RC is 1.5 3.0dl / g
- intrinsic viscosity of propylene polymer component [??] Ratio of intrinsic viscosity of one component of copolymer to PP [??]
- the film (I) accounts for 50% or more based on the thickness of the multilayer film.
- the present invention provides a propylene-based resin composition comprising a propylene polymer component and a copolymer component of ethylene and propylene.
- the content of the propylene polymer component [W PP ] is 9330% by weight, and the content of the copolymer component [W RC ] is?
- a propylene-based resin composition having a PP) in the range of 0.5 1.2 was processed and stretched 360 times to obtain a polypropylene film.
- the thickness [D!] Of the film was 10 100 m, , Film thickness
- the content of the copolymer component [W RC ] is It is intended to provide a method for controlling the gas permeability of a polypropylene film, which is characterized by adjusting so as to satisfy the following relationship.
- the film thickness [D!] Of the gas permeable film of the present invention is in the range of 10 100 m, (1) water vapor permeability [To] (JIS Z-0208), (2) oxygen gas permeability Degree [T 02 ] (according to JIS K-7126A) and (3) Ethylene gas permeability [ ⁇ ] (according to JIS K-7126 ⁇ ), which satisfy the following numerical ranges, respectively.
- the thickness of the gas-permeable film of the present invention is 10 to 100 m, and the film formability and workability ( It is preferable from the viewpoint of, for example, packaging property. If the film thickness is thinner than 10 mm, it is difficult to make the thickness uniform, and if it is thicker than 100 // m, the gas permeability decreases. Therefore, it is not preferable. In particular, it is preferably from 15 to 70 m because freshness of the fruits and vegetables can be maintained well.
- the water vapor permeability of the film is less than 9, moisture is trapped in the package and decay is likely to be promoted, and if it is more than 50, fruits and vegetables, especially vegetables, etc. are undesirably dried and easily withered.
- the oxygen gas permeability is less than 600, the fruits and vegetables are difficult to breathe and lose their freshness.
- the oxygen gas permeability is more than 12500, the water vapor permeability is undesirably too large.
- the oxygen gas permeability is preferably from 600 to 12500, particularly preferably from 1000 to 5000.
- the ethylene gas permeability is less than 600, rot of fruits and vegetables is easily promoted, and if it is more than 22500, water vapor permeability becomes too large, which is not preferable.
- the ethylene gas permeability is preferably from 600 to 22500, particularly preferably from 600 to 9000.
- the gas permeable film of the present invention is a film composed of the following specific propylene-based resin composition, and is an unstretched or stretched (uniaxially stretched, biaxially stretched) film using the composition.
- the method for producing the film include a T-die method and an inflation method which are usually used for producing a polyolefin film.
- Examples of a stretching method include a sequential biaxial stretching method using a ten-in-one method and a tubular method. And a simultaneous biaxial stretching method.
- the propylene-based resin composition used in the present invention is a composition comprising a propylene polymer component and a copolymer component of ethylene and propylene, wherein the copolymer component is contained in an amount of 7 to 70% by weight based on the weight of the composition. It is preferable in terms of performance that the freshness of the fruits and vegetables can be maintained well. If the content of this copolymer component is less than 7% by weight, the amount of gas permeation is small. If the content is less than 70% by weight, the resulting film becomes opaque. As a packaging material, the commercial value is lowered, which is not preferable. In particular, it is more preferable for the packaging material for fruits and vegetables to contain the copolymer component in the range of 15 to 50% by weight, particularly preferably 20 to 50% by weight.
- Intrinsic viscosity ratio between PP and RC / [77] PP is 0.5-1.2, transparent It has good properties and appearance and is preferable as a packaging material for fruits and vegetables. Intrinsic viscosity of copolymer component
- RC influences the mechanical properties such as rigidity and transparency of film and film, the intrinsic viscosity ratio of the copolymer component of propylene polymer component [? 7] RC / [7 ?] PP is flop It affects the dispersibility of the copolymer component in the propylene polymer component. [7?] If the RC is less than 1.5 dl / g, the mechanical properties of the resulting film will decrease,
- the film becomes opaque, which is not preferable.
- [??] RC / [ ⁇ ?] PP is more than 1.2, the film becomes opaque, and when it is less than 0.5, the strength of the film becomes weak.
- the copolymer component contains 20 to 90% by weight of ethylene polymerization units based on the weight of the copolymer component from the viewpoint of obtaining an appropriate gas permeability. If the amount of the ethylene polymerized unit is less than 20% by weight, the gas permeability is reduced, and if it is more than 90% by weight, the resulting film becomes opaque. In particular, when the ethylene polymer unit is contained in an amount of 20 to 55% by weight, preferably 25 to 55% by weight, a more transparent fruit and vegetable packaging material having a good appearance can be obtained.
- the copolymer component contains 80 to 99.6% by weight, based on the weight of the copolymer component, of a xylene-soluble component at 20 ° C. from the viewpoint of maintaining a suitable gas permeation amount. If the xylene-soluble component at 20 ° C is less than 80% by weight, the amount of gas permeation becomes small, which is not preferable.
- the propylene polymer in the specification of the present application includes, besides a propylene homopolymer (propylene homopolymer), a propylene one-year-old olefin copolymer having a propylene polymerization unit content of 92% by weight or more.
- a propylene polymer substantially consisting of propylene polymerized units generally means a propylene homopolymer or a copolymer of propylene and olefin having a propylene polymerized unit content of not less than 92% by weight.
- the copolymer of ethylene and propylene substantially consisting of an ethylene polymerized unit and a propylene polymerized unit is such that the content of the ethylene polymerized unit is 20 to 90% by weight and the content of the propylene polymerized unit is 80%. It usually refers to a copolymer of ethylene and propylene at 10% by weight.
- the film of the invention of the present invention is particularly suitable for a film substantially composed of polymerized units.
- Polyolefin film obtained by using olefin, furthermore, propylene polymer substantially consisting of propylene polymerized units, and polypropylene consisting of copolymer of ethylene and propylene substantially consisting of propylene polymerized units and ethylene polymerized units It is preferably a film.
- the film is a film obtained by using a composition satisfying the constitution defined in the present invention, particularly, the film of the present invention has excellent transparency and film even in a single layer.
- polyolefin films have been proposed in the past as a means for imparting gas permeability, including a method in which a chemical species having a polar group is included as one component of a composition constituting the film. The component may cause restrictions on use when the polyolefin film is cut and recycled for use as a polyolefin raw material.
- chemical components such as polar groups may be used.
- the design of the multilayer film is subject to the restrictions, such as the need to select a film composed of components having affinity for this as another laminated component.
- the film of the present invention is of industrial significance in that it uses a polyolefin film substantially composed of olefin polymerized units and has excellent suitability as a film for fruits and vegetables even in a single-layer film. Is extremely large.
- the propylene polymer component is a propylene homopolymer or a propylene-olefin copolymer having a propylene polymerization unit content of 92% by weight or more, and the isopropylene pentad fraction [P] is propylene homopolymer.
- P is propylene pentad fraction
- the Q value [Mw / Mn] of the propylene-based resin composition is preferably 5 or less in order to impart good gloss to the obtained stretched polypropylene film. If the Q value is greater than 5, it is difficult to obtain a stretched polypropylene film with good gloss.
- the Q value of the propylene-based resin composition has a narrow molecular weight distribution of 4.7 or less in order to obtain a transparent and good-looking fruit and vegetable packaging material.
- the stretched polypropylene film of the present invention is obtained by processing the propylene-based resin composition used in the present invention, stretching the processed product at least in a uniaxial direction, and stretching at a stretch ratio of 3 to 60 times. It is preferable to maintain the transparency, strength, and gas passage of the film. If the draw ratio is less than 3 times, a film having a non-uniform thickness is likely to be obtained, and if it is more than 60 times, the film itself becomes difficult to form, which is not preferable. Preferably, it is 10 to 60 times, more preferably 20 to 50 times.
- Polypropylene film is particularly stretched and used to provide the film strength required for packaging materials and the straight-cutting properties.
- polypropylene films generally have a high degree of regularity in molecular orientation due to stretching.
- gas such as water vapor and oxygen becomes difficult to pass through the film.
- the propylene-based resin composition suitably used in the present invention has a feature that even when stretched, there is little decrease in gas permeation performance, and since it has excellent transparency, it is required by the use environment. If necessary, it is possible to design a thicker film.
- the stretched polypropylene film of the present invention is obtained by molding a propylene-based resin composition used in the present invention by a usual T-die method or an inflation method to obtain a sheet. It can be manufactured by stretching. Examples of the stretching method include a sequential biaxial stretching method using a ten-time method and a simultaneous biaxial stretching method using a tubular method.
- the melt flow rate of the propylene-based resin composition (230 ° C., load 21.18N) is preferably from 0.1 to 10 g and 80 minutes from the viewpoints of moldability at the time of film molding and appearance of the obtained film. ⁇ 5g 0 min is more preferred.
- the thickness [D i] (u rn) of the film and the content of one copolymer component [WR C] (% by weight) in the propylene-based resin used are 0.1 ⁇
- (Unit: wt% / ⁇ m) particularly preferably in the range of 1.0 ⁇ WR / DI ⁇ 2.5 (unit: wt% / ⁇ m).
- the permeability of each gas of water vapor, oxygen, and ethylene is determined by the weight percentage of one component of a copolymer of ethylene and propylene contained in the propylene resin composition used in the present invention. (WRC). Therefore, if the target packaging application is set (that is, the film thickness and the like are set) and the required gas permeation performance is set, the weight% of a suitable copolymer component is known in advance by the above relational expression. By designing the propylene-based resin composition to be used in accordance with this, it is possible to control the gas permeability of the obtained packaging polypropylene film to a desired value.
- the gas permeability of each of the films converted to a thickness of 25 m has a relationship represented by the approximate expressions (A), (B), and (C). You. Therefore, from these relational expressions, it is possible to know more specifically the permeation amount of each gas to be applied, depending on the fruits and vegetables to be packed and the packaging form, and to more precisely reflect the gas permeation performance in the film to be obtained. is there.
- the thickness [D 1] of the film when the thickness [D 1] of the film is in the range of 10 100 m, (1) water vapor permeability [T o] (based on JIS Z-0208), (2) oxygen gas The following numerical ranges can be satisfied for the permeability [T 2 ] (according to JIS K-7126A) and (3) Ethylene gas permeability [T] (according to JIS K-7126A).
- the water vapor permeability of the film is less than 5.5, moisture is trapped in the package and decay is easily promoted, and if it is more than 50, fruits and vegetables, especially vegetables, etc. tend to dry out and die. .
- the oxygen gas permeability is less than 600, Objects tend to lose their freshness because they cannot breathe, and if it is larger than 12500, it is not preferable because water vapor permeability becomes too high.
- the oxygen gas permeability is preferably from 600 to 12,500, particularly preferably from 1000 to 5000.
- the ethylene gas permeability is smaller than 600, the decay of fruits and vegetables is easily promoted, and if it is larger than 22500, the water vapor permeability becomes undesirably too large.
- the ethylene gas permeability is preferably from 600 to 22500, particularly preferably from 600 to 9000.
- the propylene-based resin composition used in the present invention may be produced by any method as long as the above-mentioned various properties are satisfied.
- a composition containing a propylene polymer component and a copolymer component of ethylene and propylene is used as the propylene-based resin composition
- the composition is, of course, separately manufactured propylene polymer component, and ethylene.
- a propylene copolymer component may be obtained by mixing using a mixing device.
- it can be obtained by a multistage polymerization method in which a propylene polymer component is first produced in a first polymerization step, and then a copolymer component of ethylene and propylene is continuously produced in a second polymerization step.
- the intrinsic viscosity of the copolymer component in the composition ["] RC cannot be measured directly, but the intrinsic viscosity of one component of the propylene polymer [77] PP and propylene resin From the intrinsic viscosity of the composition [77] WHOLE, and the weight% of the copolymer component [WRC], it can be obtained by calculation using the following formula (1).
- the continuous production method involves the production of a polypropylene polymer component. , At least a complex containing magnesium, titanium and halogen, an organometallic compound of a metal belonging to Groups 1 to 3 of the periodic table, and a catalyst formed from an electron donor. Examples of the method include producing a copolymer component with propylene by a known polymerization method.
- the method for producing the propylene-based resin composition which is a preferred component as the propylene-based resin composition of the present invention, is known.
- a titanium-containing solid catalyst component (h) having a large particle size and an organic aluminum (5) and the polymerization of polypropylene (first polymerization step) in the gas phase in the presence of a stereoregular catalyst consisting of a combination with the organic silicon compound (a) used as required, Propylene-ethylene Polymerization of the copolymer (second polymerization step) may be performed.
- the titanium-containing solid catalyst (h) in the stereoregular catalyst can be used without a carrier, but it can also be used by supporting an inorganic carrier such as a magnesium compound, a silica compound and alumina or an organic carrier such as polystyrene. Further, it is also possible to use those obtained by reacting and adding an electron donor such as ethers or esters.
- a titanium-containing solid catalyst obtained by spraying an alcohol solution of a magnesium compound, partially drying the solid component, and then treating the dried solid component with a titanium halide and an electron donor (Japanese Unexamined Patent Publication No. And a magnesium compound carrier obtained by dissolving a magnesium compound in a solution of tetrahydrofuran / alcohol / electron donor and depositing the titanium halide alone or in combination with an electron donor. And a titanium-containing solid catalyst treated with titanium halide and an electron donor (Japanese Patent Application Laid-Open No. 4-130364).
- the titanium-containing solid catalyst (h) has an average particle size of 25 to 300 ⁇ m, preferably 30 to 150 ⁇ m, and the particle size distribution is uniform in a normal distribution. It is said that those which are 2.0 or less at one time are preferable because the obtained block copolymer has good flowability and enables continuous stable operation.
- the general formula is A 1 ( P + q ) (wherein, R 1 and R 2 are the same or different of a hydrocarbon group such as an alkyl group, a cycloalkyl group and an aryl group and an alkoxy group, X represents a halogen atom, and p and q represents a positive number of 0 ⁇ p + q ⁇ 3).
- organoaluminum compound examples include trimethylaluminum, triethylaluminum, tri-n-propylaluminum, tri-n-butylaluminum, tri-i-butylaluminum, tri-n-hexylaluminum, and tri-aluminum.
- Trialkyl aluminum such as xyl aluminum, tree n-octyl aluminum, etc., getyl aluminum chloride, g-n-propyl aluminum manganese chloride, g-i-butyl aluminum chloride, getyl aluminum nickel chloride, getyl aluminum eye Oxide and other dialkyl aluminum monohalides, and Jethyl aluminum hydride and other dialkyl aluminum Alkyl aluminum such as muhide dry and ethyl aluminum sesquichloride, etc.Alkoxyalkyl aluminum such as ethoxy monoethyl aluminum, etc.
- trialkylaluminum and dialkylaluminum monohalides are used. These organic aluminum compounds can be used alone or in combination of two or more.
- organic silicon compound (a) examples include trimethylmethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, diphenyldimethoxysilane, methyltrimethoxysilane, vinyltrimethoxysilane, phenyltrimethoxysilane, trimethylethoxysilane, dimethyljetoxysilane, and di-i—.
- a stereoregular catalyst containing the above-mentioned titanium-containing solid catalyst component (i), an organoaluminum compound (?) And, if necessary, an organosilicon compound (a) is used. It is used for the polymerization of propylene in one polymerization step.
- the titanium-containing solid catalyst component (H) can be used after preliminarily polymerizing by reacting an olefin such as propylene in advance.
- the polymerization system may be any of a batch system, a semi-continuous system and a continuous system, but a continuous system is often employed industrially.
- the first polymerization step can be carried out by gas phase polymerization, slurry polymerization or bulk polymerization, but the second polymerization step carried out after this step involves slurry polymerization or bulk polymerization.
- a copolymer of ethylene and propylene In some cases, gas-phase polymerization is used because the components including the primary component elute into the solution, making it difficult to maintain stable operation.Therefore, the first polymerization step is also called gas-phase polymerization. There are many.
- the polymerization conditions for one component of the propylene polymer in the first polymerization step vary depending on the type of polymerization used.
- a pre-polymerized titanium-containing catalyst, etc. while mixing and stirring a certain amount of polypropylene powder
- a stereoregular catalyst consisting of: a polymerization temperature of 20 to 120 ° C, preferably 40 to 100 ° C, and a polymerization pressure of 9.9 MPa from atmospheric pressure, preferably 0.59 to 5.
- Polymerization is performed by controlling propylene at 0 MPa and supplying propylene and other olefins as necessary.
- the molecular weight of the propylene polymer component is adjusted by using a molecular weight modifier such as hydrogen so that the intrinsic viscosity [ ⁇ ?] Satisfies a predetermined range.
- a second polymerization step for producing a component containing one component of a copolymer of ethylene and propylene is performed.
- the polymerization conditions for the second polymerization step are as follows: a polymerization temperature of 20 to 120 ° C, preferably 40 to 100 ° C, and a polymerization pressure from atmospheric pressure to 9.9 MPa, preferably 0.59 to 5.
- a random copolymerization is performed by controlling a to supply a mixed monomer of ethylene and propylene.
- the weight of the component, including the copolymer component of ethylene and propylene, relative to the weight of the propylene polymer component can be controlled by adjusting the polymerization time or by using a polymerization activity regulator such as carbon monoxide or hydrogen sulfide.
- the molecular weight of the copolymer component of ethylene and propylene is adjusted by adding a molecular weight regulator such as hydrogen so that the intrinsic viscosity [7?] Falls within a predetermined range.
- a molecular weight regulator such as hydrogen so that the intrinsic viscosity [7?] Falls within a predetermined range.
- remove the monomer and deactivate the known catalyst Through a post-treatment step such as a treatment step, a propylene-based resin composition is obtained.
- Known additives such as an antioxidant, an antiblocking agent, an antifogging agent, and a surfactant may be added to the stretched polypropylene film of the present invention as long as the effects of the present invention are not impaired.
- any method can be used as long as they can be uniformly mixed.
- the mixture is mixed with a ribbon blender, a Hensile mixer (trade name) or the like, and the mixture is mixed. Is preferred to be melt-kneaded with an extruder or the like.
- the multilayer film of the present invention is a multilayer film including a stretched polypropylene film using the propylene-based resin composition used in the present invention, and another film.
- a two-layer film comprising: a stretched polypropylene film of the present invention; and a film obtained by processing at least one polymer selected from the above (a) to (d); (2) a stretched polypropylene film of the present invention; A film obtained by processing at least one polymer selected from the above (a) to (d); and a film obtained by processing at least one polymer selected from the above (a) to (d).
- the stretched polypropylene film is preferably 50% or more based on the thickness of the film in order to maintain an appropriate gas permeation amount. If the thickness is less than 50%, the amount of gas permeation tends to be insufficient, which is not preferable.
- the method for producing the multilayer film is not particularly limited, and examples thereof include a multilayer extrusion molding method, a dry lamination method, and an extrusion lamination method.
- a flat film is processed into a bag shape using a known method such as heat sealing or fusing sealing.
- the following configuration is preferable as the film configuration.
- a laminated film with a sealant film such as a CPP film having a property. That is, a multilayer film in which a film selected from (b) to (d) is laminated on at least one surface of the film (I) is preferable.
- the composition of the film is not particularly limited, and the multilayer film can be used. The surface layer does not necessarily have to have a low melting point, even if it is an film,
- a multilayer film in which a film selected from the above (a) to (d) is laminated on at least one surface of (I) may be used, or a single-layer film may be used.
- the gas-permeable film of the present invention can maintain the oxygen gas uptake and ethylene gas emission sufficiently, and moderately suppress the water vapor emission, resulting in a longer freshness of fruits and vegetables.
- the effect that it can be maintained can be exerted.
- vegetables, root vegetables, fruits, flowers, mushrooms, and the like are collectively referred to as fruits and vegetables.
- the film of the present invention is a film having gas permeability suitable for packaging of fruits and vegetables, and is mainly obtained by controlling the weight% of the copolymer component of ethylene and propylene in the polypropylene resin composition used. The amount of gas passing through the drawn oriented polypropylene film and the mechanical properties (rigidity, transparency, etc.) of the film can be adjusted.
- the stretched polypropylene film of the present invention provides high productivity and profitability by eliminating the conventional step of physically forming a hole in the packaging step.
- [D,] indicates the thickness ( ⁇ m) of the film used in the examples.
- the measurement was performed using tetralin (tetrachloronaphthalene) as a solvent and an automatic viscosity measuring device (AVS2, manufactured by Mitsui Toatsu) under a temperature condition of 135 ° C.
- tetralin tetrachloronaphthalene
- AVS2 automatic viscosity measuring device
- Example 3-3 used in Example 1 can be manufactured as follows. ⁇ 1> Preparation of titanium-containing solid catalyst component (H)
- the obtained powder was sieved to obtain 2180 g of a spherical carrier having a particle size of 45 to 212 m.
- the resulting carrier performs 200 hours under aeration drying at room temperature with a flow rate of nitrogen of 3 0 L / min, to obtain a dry carrier of MgC 1 2 ⁇ E t OH.
- random copolymerization of ethylene and propylene in the second polymerization step was performed.
- the intrinsic viscosity of the ethylene-propylene random copolymer [77] and ethylene were adjusted by adjusting the polymerization conditions such that the pressure in the polymerization vessel was 2. lMPa, the molar ratio of hydrogen to propylene, and the molar ratio of ethylene.
- the polymerization unit content was adjusted.
- carbon monoxide was supplied to adjust the content of the ethylene-propylene random copolymer in the block
- the powder was withdrawn at a rate of 10.2 kg / h from the polymerization vessel so as to maintain the level of powder held in the polymerization vessel at 50% by volume.
- the extracted powder was contacted with nitrogen gas containing 5% by volume of steam at 100 ° C. for 30 minutes, and the intrinsic viscosity [] was 2.0 dl / g, and the ethylene polymerization unit content was 10.0. A percentage by weight of polymer was obtained.
- the obtained polymer was a polypropylene copolymer having a polypropylene content of 70% by weight, an ethylene-propylene random copolymer content of 30% by weight and an intrinsic viscosity of [? 7] 2. Odl / g.
- the ethylene-polymerized unit content in the ethylene-propylene random copolymer was 10% by weight.
- the content of ethylene polymerization units in the ethylene-propylene random copolymer obtained in the second polymerization step was determined by preparing a copolymer in which the reaction ratio of ethylene-propylene was changed in advance, and It was determined based on a calibration curve based on an infrared absorption spectrum created as a sample. Further, the proportion of the ethylene-propylene random copolymer in the block polymer was calculated from the ethylene polymer unit content in the block polymer.
- PP-2, PP-4 to PP-7 were produced in the same manner as PP-3 above.
- the propylene homopolymer and the polypyrene-based pyrene-based resin composition used in Examples and Comparative Examples are described using abbreviations PP-1 to PP-8.
- a polypropylene resin composition comprising a polypropylene homopolymer component and a copolymer component of ethylene and propylene, wherein the 3 ⁇ 4 value is 4.5, and the MFR (230 ° C, 21.18N) of the homopolymer component is 3.0. g / 10min, the isomeric pendant fraction (P) is 0.96, the weight percent (WRC) of the copolymer component of ethylene and propylene is 5.0, and the ethylene content in the copolymer component is 30.
- xylene-soluble component is 95% by weight
- intrinsic viscosity of the copolymer component [7?] RC is 2.0 dl / g
- a polypropylene-based resin composition comprising a polypropylene homopolymer component and a copolymer component of ethylene and propylene, wherein the value of () is 4.5, and the MFR (230 ° C, 21.18N) of the homopolymer component is 3.0 g. / 10 min, the iso-pentyl pentad fraction (P) is 0.96, the weight% (WRC) of the copolymer component of ethylene and propylene is 10.0, and the ethylene content in the copolymer component is 30 wt. %,
- the xylene-soluble component is 90% by weight, the intrinsic viscosity of the copolymer component [?
- RC is 2.0 dl / g, the ratio of the intrinsic viscosity of the copolymer component to the intrinsic viscosity of the homopolymer component ([[ r?] A polypropylene-based resin composition having RC / [77] PP) of 1.0.
- a polypropylene-based resin composition comprising a polypropylene homopolymer component and a copolymer component of ethylene and propylene, and has a value of 0, an MFR of the homopolymer component (230 ° 1.18N) of 3.0 g / 10 min, The isomeric pendant fraction (P) is 0.96, and the weight percent (WRC) of one copolymer component of ethylene and propylene is 25.
- the content of ethylene in the copolymer component is 30 wt%, xylene soluble component is 90% by weight, the intrinsic viscosity of the copolymer component [??] RC is 2.0 dl / g, the homopolymer component The ratio of the intrinsic viscosity of the copolymer component to the intrinsic viscosity of [(7?) RC / [77] PP) is 1.0.
- a polypropylene-based resin composition comprising a polypropylene homopolymer component and a copolymer component of ethylene and propylene, wherein the () value is 4.5 and the MFR (230 ° C, 21.18N) of the homopolymer component is 0.5.
- the isotactic pendant fraction (P) is 0.96
- the weight percent (WRC) of the copolymer component of ethylene and propylene is 25.0
- the ethylene content in the copolymer component is 30% by weight
- xylene-soluble component is 90% by weight
- intrinsic viscosity of the copolymer component [??] Rc is 3.0dl / g
- ratio of intrinsic viscosity of copolymer component to intrinsic polymer homopolymer component [] A polypropylene-based resin composition having RC / [77] PP) of 0.5.
- the isotactic pentad fraction (P) is 0.96
- the weight percent (WRC) of a copolymer of ethylene and propylene is 85.0
- the ethylene content in the copolymer is 30% by weight
- xylene-soluble component is 85% by weight
- intrinsic viscosity of the copolymer component [??] RC is 2.0dl / g
- a polypropylene resin composition wherein the ratio of the intrinsic viscosity of the copolymer component to the intrinsic viscosity ratio of the limer component ([? 7] R c / [77] PP) is 1.0.
- the sheet was first preheated at 158 ° C for 120 seconds with a sheet obtained from the composition of PP-1 to ⁇ -7.
- the sheet obtained from the composition No. 8 was preheated at 5 ° C for 120 seconds, then sequentially stretched 4.5 times in the machine direction and 8.0 times in the transverse direction at a stretching speed of 10 m / min.
- Each biaxially stretched film as shown in 1 was obtained.
- Predetermined test pieces were prepared using the films, and transparency, rigidity, and gas permeability were measured in accordance with the predetermined test method. Table 1 shows the results.
- Example 1 Example 2
- Example 3 Example 4
- Example 5 Example 6 Comparison (row 1 comparative example 2 comparison (row 3 comparative example 4 base composition PP-3 PP-4 PP-5 PP-6 PP- 4 PP-4 PP-1 PP-2 PP-7 PP-8
- Table 2 shows an example of 150 g of spinach wrapped in a 30 x 30 cm side fusing seal bag using each film and stored at a temperature of 10 ° C and a humidity of 50%.
- Table 4 shows a package of 100 g of cut lettuce in a 30 x 40 cm bag. Examples of storage at a temperature of 10 ° C and a humidity of 50 are shown.
- Tables 2, 3 and 4 show, as Comparative Example 5, an example using a film in which holes of 3 mm in diameter were drilled at the ratio of 5 pieces / 30 x 30 cm from the film of Comparative Example 1. Also described.
- the packaging bag using the stretched polypropylene film of the present invention having good gas permeability has a smaller packing bag than the packaging bag of Comparative Example 5 in which perforation processing is performed.
- the freshness of the fruits and vegetables was well maintained.
- the freshness retention period was extended by at least three days compared to conventional polypropylene packaging bags that were not perforated.
- Example? -9 Using the pellet-shaped composition obtained in Example 2 and the pellet-shaped composition obtained in Comparative Examples 1 and 4, a multilayer (bilayer) biaxially stretched film having a composition ratio shown in Table 5 was used.
- the composition ratio of the composition used indicates the thickness ratio of the film obtained with each composition in the multilayer film. Table 5 shows the experimental results.
- the stretched polypropylene film in the present invention is mainly used for adjusting the weight percent of one component of a copolymer of ethylene and propylene in the polypropylene resin composition to be used, thereby obtaining the gas permeation amount and film of the obtained stretched film.
- the transparency and mechanical properties can be controlled.
- the obtained stretched film is a stretched polypropylene film excellent in productivity and profitability that can omit the step of making a physical hole in the packaging process, and is effective as a packaging material for fruits and vegetables.
- the gas permeable film of the present invention can maintain the oxygen gas uptake and ethylene gas emission sufficiently, and moderately suppress the water vapor emission, thereby reducing the freshness of fruits and vegetables. The effect of being able to maintain for a long time can be achieved.
- the film of the present invention is a film having gas permeability suitable for packaging fruits and vegetables, and is mainly controlled by controlling the weight% of one component of a copolymer of ethylene and propylene in the polypropylene resin composition used. It is possible to adjust the amount of gas passing through the obtained stretched polypropylene film divided by the mechanical properties (rigidity, transparency, etc.) of the film.
- the stretched polypropylene film of the present invention provides high productivity and profitability by eliminating the conventional step of physically forming a hole in the packaging step.
- the gas permeable film of the present invention can be widely used for packaging of fruits and vegetables.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Wrappers (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55029399A JP3523886B2 (ja) | 1998-04-02 | 1999-04-02 | 気体透過性フィルム |
US09/445,194 US6348271B1 (en) | 1998-04-02 | 1999-04-02 | Film having gas permeability |
DE69902081T DE69902081T2 (de) | 1998-04-02 | 1999-04-02 | Folie mit gasdurchlässigkeit |
EP99910831A EP0987290B1 (en) | 1998-04-02 | 1999-04-02 | Film having gas permeability |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/107092 | 1998-04-02 | ||
JP10709298 | 1998-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999051665A1 true WO1999051665A1 (fr) | 1999-10-14 |
Family
ID=14450267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/001761 WO1999051665A1 (fr) | 1998-04-02 | 1999-04-02 | film perméable au gaz |
Country Status (8)
Country | Link |
---|---|
US (1) | US6348271B1 (ja) |
EP (1) | EP0987290B1 (ja) |
JP (1) | JP3523886B2 (ja) |
CN (1) | CN1122070C (ja) |
DE (1) | DE69902081T2 (ja) |
ID (1) | ID22913A (ja) |
TW (1) | TW460530B (ja) |
WO (1) | WO1999051665A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2000012306A2 (en) * | 1998-08-27 | 2000-03-09 | Applied Extrusion Technologies, Inc. | High otr polyolefin films |
WO2001030907A1 (en) * | 1999-10-28 | 2001-05-03 | Applied Extrusion Technologies , Inc. | Films based on three component polyolefin blend |
US6514625B1 (en) | 1999-01-21 | 2003-02-04 | Applied Extrusion Technologies, Inc. | Polyolefin films based on blends of polypropylene and olefin heteropolymers |
JP2005312433A (ja) * | 2004-03-31 | 2005-11-10 | Sumitomo Bakelite Co Ltd | 鮮度保持用包装体 |
JP2006325599A (ja) * | 2004-05-24 | 2006-12-07 | Sumitomo Bakelite Co Ltd | ヤマノイモ科のイモの保存方法及び鮮度保持用包装体の製造方法 |
JP2009185238A (ja) * | 2008-02-08 | 2009-08-20 | Mitsui Chemicals Inc | ガス透過性フィルム |
JP2011127118A (ja) * | 2009-12-18 | 2011-06-30 | Sk Innovation Co Ltd | 衝撃強度、表面特性および流動性に優れたエチレン−プロピレンブロック共重合体ベースのポリプロピレン樹脂組成物 |
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KR100733187B1 (ko) | 1999-10-26 | 2007-06-27 | 이데미쓰 고산 가부시키가이샤 | 폴리프로필렌계 필름 및 다층 적층체 |
WO2001030890A1 (fr) | 1999-10-26 | 2001-05-03 | Idemitsu Petrochemical Co., Ltd. | Film polypropylene et lamine multicouche |
US8110232B2 (en) * | 2000-09-26 | 2012-02-07 | Apio, Inc. | Packaging of bananas |
JP4910242B2 (ja) | 2001-04-03 | 2012-04-04 | Jnc株式会社 | ポリプロピレン系樹脂組成物及びそれを用いた気体透過性フィルム |
US6899249B2 (en) * | 2001-10-26 | 2005-05-31 | Fresh Advantage, Inc. | Tray for storing and transporting products |
US8835015B2 (en) * | 2003-12-19 | 2014-09-16 | Toray Plastics (America), Inc. | High oxygen transmission biaxially oriented film with improved tensile properties |
US7078463B2 (en) * | 2003-12-19 | 2006-07-18 | Toray Plastics (America), Inc. | High oxygen transmission biaxially oriented polypropylene film |
US20080299266A1 (en) * | 2003-12-22 | 2008-12-04 | Apio, Inc. | Containers |
FR2869543B1 (fr) * | 2004-04-30 | 2006-07-28 | Expanscience Laboratoires Sa | Medicament comprenant un extrait peptidique d'avocat destine au traitement et la prevention des maladies liees a une deficience du systeme immunitaire |
US9089576B2 (en) * | 2004-04-30 | 2015-07-28 | Laboratoires Expanscience | Medicament comprising a peptide extract of avocado, which is intended for the treatment and prevention of illnesses that are linked to an immune system deficiency or oxidative stress or skin ageing or dry skin |
GB2438178A (en) | 2006-05-19 | 2007-11-21 | Innovia Films Ltd | Sealable peelable film |
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US7526917B1 (en) | 2008-08-11 | 2009-05-05 | Hoffman John C | Gas diffusion vacuum device |
WO2010019943A1 (en) * | 2008-08-15 | 2010-02-18 | Toray Plastics (America), Inc. | Heat sealable monoaxially-oriented propylene-based film with directional tear |
EP2648910B1 (en) | 2010-12-09 | 2018-08-08 | Basell Poliolefine Italia S.r.l. | Permeable polymer film |
US11613637B2 (en) | 2017-09-14 | 2023-03-28 | Basell Poliolefine Italia S.R.L. | Permeable polymer film |
BR112020014957A2 (pt) | 2018-02-28 | 2020-12-22 | Basell Poliolefine Italia S.R.L. | Filme de polímero permeável |
WO2021257530A1 (en) * | 2020-06-18 | 2021-12-23 | Saint-Gobain Performance Plastics Corporation | Multifunctional film |
TWI795795B (zh) * | 2020-12-29 | 2023-03-11 | 大江生醫股份有限公司 | 蔬果保鮮包裝材料、蔬果保鮮包裝袋及其製作方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63152638A (ja) * | 1986-10-06 | 1988-06-25 | アプライド・エクストルージョン・テクノロジーズ・インコーポレーテッド | 調整雰囲気の包装用フィルム |
JPH04296530A (ja) * | 1991-03-26 | 1992-10-20 | Honshu Paper Co Ltd | 感光性硬化樹脂製版用のカバーフィルム |
JPH0538792A (ja) * | 1991-08-08 | 1993-02-19 | Mitsubishi Petrochem Co Ltd | 熱成形用ポリプロピレン樹脂積層体フイルム |
JPH05112682A (ja) * | 1991-10-21 | 1993-05-07 | Mitsubishi Petrochem Co Ltd | ポリプロピレン組成物 |
JPH05168398A (ja) * | 1991-12-19 | 1993-07-02 | Sumitomo Chem Co Ltd | 青果物鮮度保持用包装袋 |
JPH07330985A (ja) * | 1994-06-15 | 1995-12-19 | Showa Denko Kk | ポリプロピレン系フィルムおよびシート |
JPH0834103A (ja) * | 1994-07-22 | 1996-02-06 | Showa Denko Kk | 多層フィルム |
JPH08217930A (ja) * | 1995-02-10 | 1996-08-27 | Chisso Corp | オレフィン重合体組成物 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63102634A (ja) | 1987-07-27 | 1988-05-07 | Toyobo Co Ltd | 青果物の鮮度保持方法 |
GB2219185B (en) | 1987-08-06 | 1991-12-11 | Daicel Chem | Film for keeping freshness of vegetables and fruits |
JP2580660B2 (ja) | 1987-12-26 | 1997-02-12 | 東洋紡績株式会社 | エノキダケの鮮度保持方法 |
JP2879347B2 (ja) | 1989-10-02 | 1999-04-05 | チッソ株式会社 | オレフィン重合用触媒の製法 |
JPH082241B2 (ja) * | 1990-04-20 | 1996-01-17 | 東洋製罐株式会社 | 青果物鮮度保持包装材と包装方法および包装体 |
JP2964581B2 (ja) | 1990-08-14 | 1999-10-18 | 東洋紡績株式会社 | 高速製袋可能な鮮度保持用包装フィルム |
JP2935878B2 (ja) | 1990-08-22 | 1999-08-16 | チッソ株式会社 | オレフィン重合用触媒成分 |
US5110677A (en) * | 1990-10-01 | 1992-05-05 | W. R. Grace & Co.-Conn. | Lettuce packaging film |
CN1017682B (zh) | 1990-11-13 | 1992-08-05 | 中国科学院化学研究所 | 高透过性聚丙烯微孔膜及其制法 |
US5744205A (en) * | 1992-02-06 | 1998-04-28 | Toyo Seikan Kaisha, Ltd. | Semi-sealed or sealed package for preserving produce composed of resin covered paper |
JPH06211996A (ja) | 1993-01-20 | 1994-08-02 | Toppan Printing Co Ltd | 高ガス透過フィルム |
JPH07118429A (ja) | 1993-10-26 | 1995-05-09 | Tonen Chem Corp | ポリプロピレン多孔性フイルムの製法 |
US6086967A (en) * | 1996-11-06 | 2000-07-11 | The Dow Chemical Company | Modified atmosphere films useful in the packaging of perishable food |
-
1999
- 1999-04-02 TW TW088105304A patent/TW460530B/zh not_active IP Right Cessation
- 1999-04-02 ID IDW991483A patent/ID22913A/id unknown
- 1999-04-02 EP EP99910831A patent/EP0987290B1/en not_active Expired - Lifetime
- 1999-04-02 US US09/445,194 patent/US6348271B1/en not_active Expired - Lifetime
- 1999-04-02 WO PCT/JP1999/001761 patent/WO1999051665A1/ja active IP Right Grant
- 1999-04-02 JP JP55029399A patent/JP3523886B2/ja not_active Expired - Fee Related
- 1999-04-02 DE DE69902081T patent/DE69902081T2/de not_active Expired - Lifetime
- 1999-04-02 CN CN99800860A patent/CN1122070C/zh not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63152638A (ja) * | 1986-10-06 | 1988-06-25 | アプライド・エクストルージョン・テクノロジーズ・インコーポレーテッド | 調整雰囲気の包装用フィルム |
JPH04296530A (ja) * | 1991-03-26 | 1992-10-20 | Honshu Paper Co Ltd | 感光性硬化樹脂製版用のカバーフィルム |
JPH0538792A (ja) * | 1991-08-08 | 1993-02-19 | Mitsubishi Petrochem Co Ltd | 熱成形用ポリプロピレン樹脂積層体フイルム |
JPH05112682A (ja) * | 1991-10-21 | 1993-05-07 | Mitsubishi Petrochem Co Ltd | ポリプロピレン組成物 |
JPH05168398A (ja) * | 1991-12-19 | 1993-07-02 | Sumitomo Chem Co Ltd | 青果物鮮度保持用包装袋 |
JPH07330985A (ja) * | 1994-06-15 | 1995-12-19 | Showa Denko Kk | ポリプロピレン系フィルムおよびシート |
JPH0834103A (ja) * | 1994-07-22 | 1996-02-06 | Showa Denko Kk | 多層フィルム |
JPH08217930A (ja) * | 1995-02-10 | 1996-08-27 | Chisso Corp | オレフィン重合体組成物 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0987290A4 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000012306A2 (en) * | 1998-08-27 | 2000-03-09 | Applied Extrusion Technologies, Inc. | High otr polyolefin films |
WO2000012306A3 (en) * | 1998-08-27 | 2000-06-02 | Applied Extrusion Technologies | High otr polyolefin films |
US6514625B1 (en) | 1999-01-21 | 2003-02-04 | Applied Extrusion Technologies, Inc. | Polyolefin films based on blends of polypropylene and olefin heteropolymers |
WO2001030907A1 (en) * | 1999-10-28 | 2001-05-03 | Applied Extrusion Technologies , Inc. | Films based on three component polyolefin blend |
JP2005312433A (ja) * | 2004-03-31 | 2005-11-10 | Sumitomo Bakelite Co Ltd | 鮮度保持用包装体 |
JP4534781B2 (ja) * | 2004-03-31 | 2010-09-01 | 住友ベークライト株式会社 | 鮮度保持用包装体 |
JP2006325599A (ja) * | 2004-05-24 | 2006-12-07 | Sumitomo Bakelite Co Ltd | ヤマノイモ科のイモの保存方法及び鮮度保持用包装体の製造方法 |
JP4553148B2 (ja) * | 2004-05-24 | 2010-09-29 | 住友ベークライト株式会社 | 鮮度保持用包装体の製造方法 |
JP2009185238A (ja) * | 2008-02-08 | 2009-08-20 | Mitsui Chemicals Inc | ガス透過性フィルム |
JP2011127118A (ja) * | 2009-12-18 | 2011-06-30 | Sk Innovation Co Ltd | 衝撃強度、表面特性および流動性に優れたエチレン−プロピレンブロック共重合体ベースのポリプロピレン樹脂組成物 |
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Publication number | Publication date |
---|---|
EP0987290A4 (en) | 2000-08-16 |
DE69902081D1 (de) | 2002-08-14 |
ID22913A (id) | 1999-12-16 |
DE69902081T2 (de) | 2003-01-30 |
US6348271B1 (en) | 2002-02-19 |
EP0987290B1 (en) | 2002-07-10 |
CN1122070C (zh) | 2003-09-24 |
EP0987290A1 (en) | 2000-03-22 |
TW460530B (en) | 2001-10-21 |
JP3523886B2 (ja) | 2004-04-26 |
CN1272120A (zh) | 2000-11-01 |
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