WO2007046307A1 - 熱融着性プロピレン系重合体組成物、熱融着性フィルム及びその用途 - Google Patents
熱融着性プロピレン系重合体組成物、熱融着性フィルム及びその用途 Download PDFInfo
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- WO2007046307A1 WO2007046307A1 PCT/JP2006/320503 JP2006320503W WO2007046307A1 WO 2007046307 A1 WO2007046307 A1 WO 2007046307A1 JP 2006320503 W JP2006320503 W JP 2006320503W WO 2007046307 A1 WO2007046307 A1 WO 2007046307A1
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- propylene
- heat
- ethylene
- propylene polymer
- polymer composition
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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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/02—Sterilising, e.g. of complete packages
- B65B55/04—Sterilising wrappers or receptacles prior to, or during, 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- 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
-
- 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
- Heat-fusible propylene polymer composition heat-fusible film, and use thereof
- the present invention relates to a heat-fusible propylene-based polymer composition having rigidity, low-temperature impact resistance, and extremely low heat-seal strength even after heat treatment such as retort sterilization.
- the present invention relates to a heat-fusible film and a package in which an object to be packaged that requires heat and sterilization treatment is packaged using the film.
- the film used as the packaging material has a high V, heat seal strength and strength so as not to break from the heat seal part. Low-temperature impact strength is required.
- Retort foods are filled with food and sealed at a high temperature of about 100 to 140 ° C. Since they are sterilized by retort in a high-pressure kettle, the packaging material has heat resistance and heat seal strength that can withstand it. Retention is also required for food quality control.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-255012
- Patent Document 2 Japanese Patent Laid-Open No. 2003-96251
- the present inventors have conducted various studies for the purpose of developing a heat-fusible film that can sufficiently prevent a decrease in heat seal strength after heating and sterilization such as retort treatment.
- the object can be achieved by adding a propylene block polymer to a propylene polymer composition comprising a component, a propylene 'a -olefin random copolymer component, and an ethylene' a -olefin random copolymer.
- a propylene block polymer to a propylene polymer composition comprising a component, a propylene 'a -olefin random copolymer component, and an ethylene' a -olefin random copolymer.
- propylene polymer component (al) and the content of propylene units is 63 to 77 mole 0/0 content of ethylene unit 23-37 moles 0 / 0 a is propylene 'ethylene random copolymer component (a2) the propylene polymer composition comprising (a),
- the content of the content of the propylene polymer component (al) and propylene units 63-77 mole 0/0, and ethylene units is from 23 to 37 mol% Propylene 'A propylene polymer composition (A) containing an ethylene random copolymer component (a2), Ethylene 'a -olefin random copolymer (B) and
- the mass ratio of the propylene polymer component (al) and the propylene 'ethylene random copolymer component ( a2 ) in the propylene polymer composition (A) is in the range of 60:40 to 97: 3,
- the intrinsic viscosity [7?] Of propylene 'ethylene random copolymer component (a2) is 1-7dl / g,
- the density of the ethylene ⁇ ⁇ -olefin random copolymer (B) is from 0.865 to 0.910 g / cm 3 ,
- the mass ratio of the propylene polymer (dl) to the propylene 'ethylene' a -olefin random polymer (d2) in the soft propylene polymer composition (D) is in the range of 5:95 to 70:30.
- the present invention also resides in a heat-fusible film obtained from the above-mentioned heat-fusible propylene polymer composition and its use.
- a package using the heat-fusible film obtained from the heat-fusible propylene-based polymer composition of the present invention has a high heat seal strength and is heat-sealed even after heat treatment. It has excellent blocking resistance, transparency and bending whitening resistance with almost no decrease in strength, and has high rigidity and low temperature impact resistance.
- Propylene polymer component contained in the propylene polymer composition according to the present invention (A) (al) a propylene homopolymer or propylene with 10 weight 0/0 or less, preferably 5 mass 0/0 following alpha - It is a copolymer with olefin.
- a-olefin is usually other than propylene ⁇ -Olefin having 2 to 10 carbon atoms, for example, ethylene, 1-butene, 3-methyl-1-butene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1 -Hexen, 1-Otaten.
- the strong propylene polymer component (al) is preferably a propylene homopolymer in view of heat resistance when formed into a film.
- the propylene / ethylene random copolymer component (a2) contained in the propylene polymer composition (A) according to the present invention is a copolymer of propylene and ethylene and has an elastomeric property. Yes.
- the content of propylene units of propylene 'ethylene random copolymer component (a2) is 63 to 77 mole 0/0, is preferably in the range of 70 to 77 mole 0/0, the content of ethylene units, 23-37 mole 0/0, preferably in the range of 23 to 30 mole 0/0.
- the content of the propylene unit is in the above range, the composition containing this copolymer component has excellent low temperature impact resistance and low temperature heat sealability, and after heat treatment! Film can be formed.
- the content of propylene units in the propylene / ethylene random copolymer component (a2) can be determined by 13 C-MNR.
- a small amount of an ⁇ -olefin component unit having about 4 to 10 carbon atoms is contained in the propylene / ethylene random copolymer component (a2) as long as the object of the present invention is not impaired. May be.
- the intrinsic viscosity [7?] Of the propylene / ethylene random copolymer component (a2) is usually 1 to 7 dl / g, preferably 1.8 to 4.5 dl / g, more preferably 2.0. ⁇ 3.3 3dl / g.
- the heat-fusible propylene polymer composition containing the intrinsic viscosity has excellent anti-blocking property while suppressing the generation of fish eyes. Film can be manufactured.
- the propylene polymer composition (A) according to the present invention comprises the propylene polymer component (al) and the propylene / ethylene random copolymer component (a2) in a mass ratio of 60:40 to 97: 3, preferably 65: 35-95: 5, more preferably a composition comprising an amount in the range of 70: 30-89: 11.
- the amount of propylene / ethylene random copolymer component (a2) is in the above range. Therefore, it is suitable for the packaging of packaging materials that require heating and sterilization treatment of films with excellent low temperature impact resistance, rigidity, initial heat seal strength and heat seal strength after heat treatment, especially retort foods. A heat-fusible film can be obtained.
- the melt flow rate of the propylene polymer composition (A) (MFR: 230 ° C in accordance with ASTM D-1238, 2.16 kg load), preferably 2 to: LOg / 10 min, more preferably Is in the range of 2.5-8g / 10min.
- a composition having such a melt flow rate value is suitable for production of a film having good film formability and excellent low temperature impact resistance.
- the propylene polymer composition (A) according to the present invention may be obtained by mixing the propylene polymer component (al) and the propylene / ethylene random copolymer component (a2) separately obtained. It can also be obtained by the polymerization step described later.
- the amount (ratio) of propylene'ethylene random copolymer component (a2) in the propylene polymer composition (A) is as follows: This is the value obtained by the method.
- the sample (a: gram) of the propylene polymer composition (A) is completely dissolved in p-xylene, then left at 23 ° C for 24 hours, and then separated by centrifugal separation (b: gram). And the P-xylene soluble part in the propylene polymer composition (A) was calculated by the following formula.
- Propylene 'ratio of ethylene random copolymer component [(ab) / a] X 100
- the (mass 0/0), the propylene' intrinsic viscosity ethylene random copolymer component (a2) [7?] Is a value measured at 135 ° C. in a decalin solvent for the precipitate recovered in this manner by adding an excess of acetone to the P-xylene-soluble part to precipitate a copolymer component.
- a propylene polymer composition (A) of a propylene polymer component (al) and a propylene 'ethylene random copolymer component (a2) is composed of a propylene polymer component (al) and a propylene' ethylene random copolymer.
- the coalescence component (a2) can be obtained by producing them in different polymerization steps and then mixing them.
- the polymerization step of the propylene polymer component (al) and the polymerization step of the propylene ethylene random copolymer component (a2) may be in series or in parallel.
- any process can be performed first, but it is preferable that the process of polymerizing the propylene polymer component (al) first is highly crystalline as the propylene polymer component (al). This is preferable because a conductive polymer can be produced.
- the first polymerization is more preferable because it can be performed by either batch polymerization method or continuous polymerization method.
- the continuous polymerization process can be carried out in a single stage using a single polymerization vessel, or can be carried out in multiple stages using a plurality of polymerization vessels.
- the propylene polymer composition (A) with the propylene polymer component (al) and the propylene random ethylene copolymer component (a2) obtained through such a polymerization step is usually a block PP.
- This propylene polymer composition (A) is actually a composition in which a propylene polymer component (al) and a propylene / ethylene random copolymer component (a2) are mixed.
- the ethylene ′ a -olefin random copolymer (B) is a random copolymer of ethylene and a 3 -olefin having 3 or more carbon atoms, preferably 4 to 10 carbon atoms.
- a-olefin include 1-butene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-tetradecene, and 1-octadecene. Can be mentioned. Of these, 1-butene, 1-hexene, and 1-octene are particularly preferable.
- These olefins may be contained alone or in combination of two or more. Further, it may be a mixture of different ethylene 'a -olefin random copolymers.
- ethylene a-olefin random copolymer (B) examples include ethylene • 1-butene random copolymer, ethylene 1-hexene random copolymer, ethylene 1-ota A tenrandom copolymer can be mentioned.
- Ethylene 'a - content of ethylene units in the O reflex in random copolymer (B) is preferably in 70 to 95 Monore 0/0, more preferably in the range of 80 to 93 Monore 0/0, also ⁇ - content of Orefin units, preferably 5 to 30 mol 0/0, more preferably Ru near the range of 7 to 20 mole 0/0.
- the ethylene' ⁇ -olefin random copolymer ( ⁇ ) is preferably an ethylene'-olefinic random copolymer having the properties described in (I) to (IV) below.
- the propylene polymer composition containing the polymer (B) has a lower low temperature impact strength and lower drop. A film excellent in lower impact strength can be obtained.
- the ethylene-olefinic random copolymer (B) may have a plurality of properties described in (I) to (IV).
- Crystallinity force measured by X-ray diffraction method is preferably 0 to 40%, more preferably 7 to 30%.
- Ratio (MwZMn) force of weight average molecular weight (Mw) to number average molecular weight (Mn) measured by gel permeation chromatography (GPC) is preferably 3 or less, more preferably 2.5 or less.
- Tm melting point
- DSC differential scanning calorimeter
- Soft propylene polymer according to the present invention (C), the content of ethylene unit 0-30 mol%, alpha 4 to 20 carbon atoms - a content of Ca ⁇ to 30 mole 0/0 Orefin units, differential scanning calorimetry
- the melting point measured with a meter (DSC) is less than 100 ° C or no melting point is observed.
- the melting point when the melting point is not observed, it means that a crystal melting peak with a heat of crystal melting: U / g or more is not observed in the range of ⁇ 150 to 200 ° C.
- the soft propylene polymer (C) is a homopolymer of propylene in the presence of a solid catalyst having a titanium compound as a main component or a meta-catalyst catalyst, or a combination of propylene and ethylene and Z or ⁇ -olefin. It can be obtained by polymerization, and it can adopt any of isotactic, syndiotactic and atactic structures for its stereoregularity.
- the soft propylene polymer (C) usable in the present invention includes: A homopolymer of propylene,
- the propylene ⁇ a - among Orefuin copolymer preferred examples are propylene units of 70 to 99 mole 0/0, 1-butene units from 1 to 30 moles 0 / 0 (100 mole 0/0 by the sum of the propylene emission units and 1-butene units) can be cited also propylene-1-butene copolymer polymer comprising force.
- the soft propylene polymer (C), the form, propylene emissions below ethylene alpha -.. O can be exemplified les fins random copolymer (d2).
- the a-olefin is an a-olefin having 4 to 20 carbon atoms, preferably 4 to 10 carbon atoms, more preferably 1-butene, 1-pentene, 1-hexene and 1-otaten, Of these, 1-butene is most preferred.
- the propylene / ethylene / ⁇ -olefin random copolymer (d2) has a characteristic that its melting point is not observed even when the point is measured with a differential scanning calorimeter (DSC).
- Such a propylene 'ethylene' a -olefin random copolymer (d2) is preferably a solid catalyst mainly composed of a titanium compound, or a single site catalyst, preferably a propylene in the presence of a metacene catalyst. It can be obtained by copolymerizing ethylene and a-olefin, and its stereoregularity, even though it is a tactic and syndiotactic Either tic structure can be employed.
- the triad tacticity (mm fraction) can be calculated by measuring the 13 C-NMR spectrum.
- the mm fraction of propylene “ethylene” (-olefin copolymer (d2)) used in the present invention is not particularly limited, but the mm fraction is preferably 85% or more, more preferably 85 to 97.5%. More preferably, it is desirable to use a propylene'ethylene'a-olefin copolymer (d2) in the range of 87 to 97%, particularly preferably 90 to 97%.
- a film having high heat seal strength and high seal strength after heat treatment can be formed.
- the melt flow rate value measured under 230 ° C, 2.16 kg load in accordance with ASTM D-1 238 is usually It is in the range of 0. Olg / 10 minutes to 3Og / 10 minutes, preferably 0. lg / 10 minutes to 2Og / 10 minutes.
- the propylene polymer composition (A) 50 to 90 weight 0/0, preferably from 55 to 90 weight 0/0, ethylene 'a - Orefuin
- the random copolymer (B) is 3 to 25% by mass, preferably 8 to 20% by mass
- Ethylene 'a - O reflex in random copolymer (B) than amounts using the compositions of less than 3 mass 0/0 of the is a possibility that poor impact resistance of the resulting heat-fusible film If the composition exceeds 25% by mass, the resulting heat-fusible film is likely to be blocked and the heat seal strength after heat treatment may be reduced. [0029] Using a composition having an amount of the soft propylene polymer (C) of less than 0.5% by mass does not improve the decrease in heat seal strength after heat treatment of the resulting heat-fusible film, If the composition exceeds 40% by mass, the resulting heat-fusible film may be easily blocked.
- 230 ° C, 2.16 kg under load is preferably in the range of 2 to: LOg / 10 min, more preferably 2.5 to 8 g / 10 min.
- a preferred form of the heat-fusible propylene-based polymer composition of the present invention the pro-propylene polymer composition (A) 50 to 90 weight 0/0, preferably from 55 to 90 weight 0/0
- the ethylene'a-olefin random copolymer (B) is 3 to 25% by mass, preferably 8 to 20% by mass
- the soft propylene polymer composition (D) is a composition having the propylene polymer (dl) and the propylene 'ethylene' a -olefin random copolymer (d2) force.
- dl) and propylene 'ethylene' ⁇ -olefin random copolymer (d2) have a mass ratio [(dl): (d2)] of 5:95 to 70:30, preferably 5:95 to 40:60. It is in the range.
- the propylene polymer (dl) is a homopolypropylene or propylene' ⁇ -olefin copolymer having a melting point of 110 to 165 ° C.
- it is a propylene ′ ⁇ -olefin copolymer having a melting point of 115 to 150 ° C.
- the a-olefin include a-olefin having 2 to 20 carbon atoms excluding propylene, specifically, ethylene and 1-butene.
- the melt flow rate value measured under 230 ° C, 2.16 kg load is 0.01 to 50 ( ⁇ / 10 min), preferably Is 0.1 to 3O (g / 10 min).
- the heat-fusible propylene-based polymer composition of the present invention includes the propylene polymer composition (A), an ethylene'a-olefin random copolymer (B), and a soft propylene polymer (C). Alternatively, it can be obtained by mixing or melt-kneading the soft propylene polymer composition (D) in a predetermined amount, but it can also be obtained by directly polymerizing each component by multistage polymerization or the like.
- the heat-fusible propylene-based polymer composition of the present invention does not impair the object of the present invention! /, Within the range, an antioxidant, a heat stabilizer, a lubricant, an antistatic agent, a hydrochloric acid absorbent, Anti-blocking agent, slip agent, nucleating agent, pigment, dye, or various polymers may be blended
- antioxidant examples include an phenolic antioxidant, an organic phosphite antioxidant, a thioether antioxidant, a hindered amine antioxidant, and the like.
- anti-blocking agent examples include aluminum oxide, fine powdered silica, polymethylmethacrylate powder, and silicone resin.
- Examples of the slip agent include bisamides such as ethylene bisstearoamide, higher fatty acid amides such as oleic acid amide, and L acid amide.
- Examples of the lubricant include higher fatty acid metal salts such as calcium stearate, zinc stearate, and metal montanate, and polyolefin waxes such as polyethylene wax and polypropylene wax.
- Examples of the nucleating agent include dibenzylidene sorbitol, a rosin nucleating agent such as a partial metal salt of rosin acid, an aluminum nucleating agent, and Tanolec.
- the heat-fusible film of the present invention can be obtained by using the above-mentioned heat-fusible propylene polymer composition and forming a film by a usual method.
- the heat-fusible propylene polymer composition pellets or powder is melted, and the T die or annular die force provided at the end of the extruder is filled with molten resin. It can be manufactured by extruding into a mud shape.
- the molten resin temperature in the extruder is preferably in the range of 200 to 300 ° C.
- the extruded film is cooled and solidified by being brought into contact with a roll set to a constant temperature with water or another medium, and then wound.
- Annular die force When extruded, the outside and Z or inside of the annular film
- the film is cooled with a body, for example, cooled air or water, and then the film is slit or wound as it is to produce the desired film.
- the film thus obtained has a thickness usually in the range of 10 to: LOOO ⁇ m, preferably 30 to 200 ⁇ m, more preferably 40 to: LOO ⁇ m.
- the heat-fusible film of the present invention can be used as a general packaging film as a single layer, and is particularly suitable as a packaging film for a packaged product requiring heating and sterilization treatment such as retort food. Is preferred. Moreover, it can be laminated
- the heat-fusible laminated film of the present invention is a laminate comprising a base material layer laminated on one side of the heat-fusible film.
- the substrate layer is not particularly limited as long as it can be used as a packaging material, and the shape may be any of a sheet, a film, a tray, a container, and the like.
- Examples of usable base material layers include thermoplastic resin films and sheets, trays and cup-shaped containers obtained by thermoforming such sheets, and similar shapes formed from aluminum foil paper. Can be mentioned.
- thermoplastic resin films include polyester resin films such as polyethylene terephthalate and polyethylene naphthalate, polycarbonate films, polyamide films such as nylon 6 and nylon 66, and ethylene butyl alcohol copolymer films.
- Polyolefin film such as polyvinyl alcohol film, polychlorinated chloride film, polyvinylidene mouth film, and polypropylene.
- Polypropylene includes a propylene polymer component similar to the propylene polymer composition (A) or the powerful propylene polymer composition (A), a propylene ′ ⁇ -olefin random copolymer, a propylene homopolymer. Those that are manufactured and sold as polypropylene resin such as coalescence can be used.
- Such a base material layer may be a single layer or a multilayer of two or more layers.
- the film may be an unstretched film or a film stretched in a uniaxial or biaxial direction.
- thermoplastic resin films are made of metals such as aluminum and zinc, silica, zinc oxide and aluminum oxide.
- a film on which an oxide or an inorganic compound is deposited may be used. Further, it may be a composite or laminate obtained by combining them.
- a biaxially stretched terephthalate film, a biaxially stretched polyamide, a biaxially stretched polypropylene and the like are preferable because of excellent heat resistance.
- a generally performed lamination method can be employed as it is, and in this case, both layers are used.
- An adhesive layer can be provided in the middle. For example, apply a urethane-based or isocyanate-based anchor coating agent to the base material layer and dry laminate a heat-sealable film on it, or directly apply a heat-sealable propylene polymer composition to the base material. It can also be produced by a method of extrusion onto a layer and laminating or extrusion coating.
- the base material layer is formed from a thermoplastic resin
- a heat-fusible propylene-based polymer composition and a heat-fusible propylene-based polymer composition are co-extruded with the thermoplastic resin such as polypropylene.
- a heat-fusible laminated film in which a heat-fusible layer obtained from the polymer composition and a base material layer made of thermoplastic resin are laminated can also be used.
- the thickness of the heat-fusible layer obtained as a heat-fusible propylene polymer composition can be reduced to 2 to 20 ⁇ m.
- the package of the present invention uses a heat-fusible film or a heat-fusible laminated film as at least one packaging material, and arranges the heat-fusible film layer so as to be located on the inner surface side. Refill foods, pharmaceuticals, medical instruments, pet foods, etc., to be packaged by heating / sealing the heat-fusible film layer and packing it that needs to be sterilized! Is packaged.
- the packaging material may be a single layer of heat-sealable film, but a heat-sealable laminated film is preferred because it can utilize various properties of the base material layer.
- a heat-fusible laminated film is used in the manufacture of packaging bodies such as retort foods, the following combinations of base material layers and heat-fusible film layers are given as specific examples of heat-fusible laminated films. Power It is not limited to this.
- Polyester layer z Aluminum foil z Heat-sealable film
- Polyester layer z Polyamide layer Z Aluminum foil Z Heat-sealable film
- the package of the present invention is heat-sealed after the heat-fusible film layer is positioned in the innermost layer, the heat-sealing strength of the heat-sealed portion is high and after the heat treatment, High heat seal strength is maintained.
- the package of the packaged material that needs to be heated and sterilized is subject to heating and sterilization of the retort food, etc., which is the content during transportation or handling in stores or at home. There is little risk of leakage of necessary packaged items, and there is room temperature! / Steel is refrigerated / refrigerated for long periods of time, so the contents are not easily altered.
- the packaged items include not only general foods but also repackaged foods, pharmaceuticals, medical instruments, pet foods, and the like that need to be heated and sterilized.
- the physical property values in Examples and Comparative Examples are values obtained by the following evaluation methods.
- a 100 x 100 mm test piece was cut out from the heat-fusible film and measured using a film impact tester with a thermostatic chamber manufactured by Toyo Seiki Co., Ltd., measuring temperature -20 ° C, hammer tip diameter 1Z 2 inches, hammer energy 3J And measured. The measured value is an average of 10 measurements.
- a biaxially stretched polyethylene terephthalate film (product name; manufactured by Emblet PET12 Lucica) with a thickness of 12 m was used as the base material layer in advance, and the corona surface of the base material layer and an aluminum foil with a thickness of 7 m were urethane.
- -Based adhesive [Made by Takeda Pharmaceutical Co., Ltd .: Trade name Takelac A616 (50%) + A65 (3.13%) + Ethyl acetate (46.87%)]
- the heat fusible film was dry-laminated with the corona surface of the heat fusible film using the urethane adhesive to prepare a heat fusible laminated film.
- the heat-sealable film surface of the heat-sealable laminated film is overlaid, and using a heat sealer TP-701-B manufactured by Tester Sangyo Co., Ltd., at each temperature, the seal gauge pressure: 0.2 MPa, time 1 second, seal width; heat sealed under 5 mm condition. Note that heating was performed only on the upper side.
- the heat-sealed test piece was cut to a width of 15 mm and peeled off at a tensile speed of 500 mm / min using Orientec's Tenshinron universal testing machine RTM-100, and its maximum strength (before retort) was heat-sealed. Strength.
- the measured value is an average of 5 measurements.
- test piece heat-sealed by the above method was subjected to a hot water shower type high-pressure high-temperature sterilization treatment. It was placed in the apparatus and treated at 121 ° C for 30 minutes and then cooled. Next, the air-dried test piece was cut to a width of 15 mm, and peeled off at a tensile speed of 500 mm / min using the same Orientec Tenshinron universal testing machine RTM-100. The heat seal strength after the bolt was set. The measured value is an average of 5 measurements.
- the retention rate (%) of the heat seal strength after retort [(heat seal strength after retort Z heat seal strength before retort) X 100] was obtained from each heat seal strength described above.
- the polymer sample was dissolved in decalin, the viscosity of the solution was measured at 135 ° C, and the measured value force was also determined as the intrinsic viscosity.
- Propylene 'ethylene-1-butene copolymer (d2) 85 Weight 0/0 [melt flow rate (230 ° C)
- Propylene polymer composition (A-1) 84. 2 Weight 0/0, ethylene '1 - butene random copolymer (Bl) 14. 8 wt%, soft propylene polymer composition (D-1) 1. 0
- the heat-fusible propylene-based polymer composition (Composition-1) obtained by mixing mass% was obtained using an unstretched film molding machine equipped with a 40 mm ⁇ extruder at an extrusion temperature of 250 ° C. The film was extruded from a T die at ° C, quenched with a casting roll at 25 ° C, and one side was corona treated to obtain a heat-fusible film with a thickness of 70 ⁇ m. The obtained heat-fusible film was evaluated by the method described above.
- Table 1 shows the evaluation results.
- composition used in Example 1- In place of propylene polymer composition (A-1) 80.7% by mass, ethylene 1-butene random copolymer (B-1) 14.3% by mass, soft Propylene polymer composition (D-1) Thickness 70 in the same manner as in Example 1 except that a heat-fusible propylene polymer composition (Composition-3) mixed with 5.0% by mass was used. m heat-fusible film was obtained. The obtained heat-fusible film was evaluated by the method described above.
- Table 1 shows the evaluation results.
- Propylene polymer composition (A-1) 76.5 mass in place of composition-1 used in Example 1 o / 0, ethylene-1 - butene random copolymer (B-1) 13. 5 mass 0/0, the soft propylene polymer composition (D-1) 10. heat fusible propylene mixed with 0 wt%
- a heat-sealable film having a thickness of 70 m was obtained in the same manner as in Example 1 except that the polymer composition (Composition-4) was used. The obtained heat-fusible film was evaluated by the method described above.
- Table 1 shows the evaluation results.
- Example 1 The composition used in Example 1 was replaced with a propylene polymer composition (A-1) 68.0 mass o / 0 , ethylene 1-butene random copolymer (B-1) 12.0 mass 0/0, the soft propylene polymer composition (D-1) 20. 0% by weight of heat-fusible propylene polymer composition prepared by mixing (composition - 5) the same method as in example 1 except using Thus, a heat-sealable film having a thickness of 70 m was obtained. The obtained heat-fusible film was evaluated by the method described above.
- Table 1 shows the evaluation results.
- the propylene polymer composition (A-1) was 85.0% by mass
- the ethylene 1-butene random copolymer (B-1) was 15.0% by mass.
- a heat-fusible film having a thickness of 70 m was obtained in the same manner as in Example 1 except that the mixed heat-fusible propylene-based polymer composition (Composition-7) was used. The obtained heat-fusible film was evaluated by the method described above.
- the heat-sealable film of Example 16 has excellent low-temperature impact strength and high heat-seal strength, and the strength after heat treatment (after retort) is also high. There is almost no decrease in heat seal strength. In contrast, in Comparative Example 1 in which the soft propylene polymer composition (D-1) was not blended, the heat seal strength after heat treatment (after retort) Has fallen.
- the heat-fusible film obtained from the heat-fusible propylene-based polymer composition of the present invention has a high heat-sealing strength, and the heat-sealing strength is extremely low even after heat treatment. It has excellent blocking resistance, and has high rigidity and low temperature impact resistance. Therefore, the heat-fusible film of the present invention can be used not only as a general-purpose packaging film but also as a packaging film for a packaged product requiring heating and sterilization treatment such as retort food.
- the heat-fusible laminated film of the present invention since the heat-fusible film having the above-mentioned properties is formed on the surface as a heat seal layer, various kinds of encapsulated materials including retort foods can be used. Suitable as packaging material!
- the package body of the packaged object requiring the heat and sterilization treatment of the retort food or the like according to the present invention maintains a high sealing strength even after the heat treatment, has an excellent appearance, It has the characteristics. Therefore, this package is heat 'sterilization process, transportation process
- seal part can be peeled off or broken 1 even under long-term room temperature or refrigerated / refrigerated storage conditions.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Packages (AREA)
- Sealing Material Composition (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20060811776 EP1947142B1 (en) | 2005-10-21 | 2006-10-13 | Fusion-bondable propylene polymer composition, fusion-bondable film, and use thereof |
CN2006800390631A CN101291985B (zh) | 2005-10-21 | 2006-10-13 | 热熔粘结性丙烯类聚合物组合物、热熔粘结性膜及其用途 |
JP2007540952A JP5063357B2 (ja) | 2005-10-21 | 2006-10-13 | 熱融着性プロピレン系重合体組成物、熱融着性フィルム及びその用途 |
US12/083,764 US8003223B2 (en) | 2005-10-21 | 2006-10-13 | Heat-sealable propylene-based polymer composition, heat-sealable film, and uses thereof |
Applications Claiming Priority (2)
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JP2005-307375 | 2005-10-21 | ||
JP2005307375 | 2005-10-21 |
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WO2007046307A1 true WO2007046307A1 (ja) | 2007-04-26 |
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PCT/JP2006/320503 WO2007046307A1 (ja) | 2005-10-21 | 2006-10-13 | 熱融着性プロピレン系重合体組成物、熱融着性フィルム及びその用途 |
Country Status (7)
Country | Link |
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US (1) | US8003223B2 (ja) |
EP (1) | EP1947142B1 (ja) |
JP (1) | JP5063357B2 (ja) |
KR (1) | KR100936567B1 (ja) |
CN (1) | CN101291985B (ja) |
TW (1) | TW200728384A (ja) |
WO (1) | WO2007046307A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP1947142A1 (en) | 2008-07-23 |
US20090258243A1 (en) | 2009-10-15 |
TW200728384A (en) | 2007-08-01 |
CN101291985A (zh) | 2008-10-22 |
EP1947142B1 (en) | 2011-10-12 |
JP5063357B2 (ja) | 2012-10-31 |
EP1947142A4 (en) | 2009-12-23 |
KR100936567B1 (ko) | 2010-01-13 |
TWI331162B (ja) | 2010-10-01 |
CN101291985B (zh) | 2011-05-11 |
KR20080068871A (ko) | 2008-07-24 |
JPWO2007046307A1 (ja) | 2009-04-23 |
US8003223B2 (en) | 2011-08-23 |
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