WO2020217362A1 - 樹脂組成物、ラップフィルム及びラップフィルム収容体 - Google Patents
樹脂組成物、ラップフィルム及びラップフィルム収容体 Download PDFInfo
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- WO2020217362A1 WO2020217362A1 PCT/JP2019/017513 JP2019017513W WO2020217362A1 WO 2020217362 A1 WO2020217362 A1 WO 2020217362A1 JP 2019017513 W JP2019017513 W JP 2019017513W WO 2020217362 A1 WO2020217362 A1 WO 2020217362A1
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- resin composition
- wrap film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/02—Wrappers or flexible covers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1515—Three-membered rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
Definitions
- the present invention relates to a resin composition, a wrap film, and a wrap film container.
- Wrap film is widely used for business purposes in hotels, restaurants, etc., or at home for food preservation, cooking, etc.
- the types of resins constituting the wrap film and the types of additives such as plasticizers, antifogging agents, and stabilizers have been devised.
- Patent Document 1 describes a vinyl chloride resin, a specific modified epoxidized vegetable oil, and a weight average molecular weight of 3000 to 10000 in order to form a wrap film having thermal stability, low elution (safety), and the like.
- a resin composition containing the polyester-based compound (polyester plasticizer) of the above in a predetermined ratio is disclosed.
- Patent Document 2 as a stretch film for food packaging having excellent cold resistance and the like, a resin composition made of an olefin-based thermoplastic elastomer is used as a core layer, and a linear low density is provided on at least one surface of the core layer.
- a stretch film for food packaging having a surface layer formed by adding low-density polyethylene and polyoxyethylene sorbitan fatty acid ester in a predetermined ratio to density polyethylene.
- the present invention provides a resin composition having excellent thermal stability and capable of forming a wrap film capable of achieving both cold resistance and low elution. With the goal.
- Another object of the present invention is to provide a wrap film obtained from the resin composition and a wrap film container provided with the wrap film.
- the present inventors can improve the thermal stability of the resin composition and can form a wrap film capable of achieving both cold resistance and low elution. I found that.
- One aspect of the present invention relates to a resin composition containing a thermoplastic resin and a compound having an ester group and an epoxy group, and the average molecular weight of the compound is 300 or more and 1500 or less.
- the above compound may be a compound represented by the following formula (1).
- R 1 and R 4 each independently represent an alkyl group
- R 2 and R 3 each independently represent an alkylene group
- m and n each independently represent an integer of 0 or more
- m and At least one of n is an integer of 1 or more.
- M in the formula (1) may be 1, and n in the formula (1) may be 0.
- R 1 in the formula (1) may be an alkyl group having 3 to 12 carbon atoms, or may be an alkyl group having 6 to 8 carbon atoms. It may be an alkyl group having 8 carbon atoms.
- R 2 in the formula (1) may be an alkylene group having 3 to 12 carbon atoms, an alkylene group having 6 to 8 carbon atoms, or an alkylene group having 7 carbon atoms.
- R 4 in the formula (1) may be an alkyl group having 3 to 12 carbon atoms, may be an alkyl group having 6-8 carbon atoms, may be an alkyl group of 7 carbon atoms, following formula (2 ) May be an alkyl group.
- the above compound may be a compound represented by the following formula (3).
- wrap film comprising a layer made of the above resin composition. Wrap film may be used for food packaging.
- Another aspect of the present invention is a wrap film accommodating body including a winding core, the above-mentioned wrap film wound around the winding core, and a box body for accommodating the winding core and the film.
- a resin composition having excellent thermal stability, cold resistance and low elution property a wrap film made of the resin composition, and a wrap film container provided with the wrap film. Can be done.
- the resin composition according to one embodiment contains a thermoplastic resin.
- the thermoplastic resin is a polyester resin such as polyethylene terephthalate, polyethylene naphthalate, or polyvinylidene terephthalate; a polyamide resin such as 6-nylon, 6,6-nylon, or 12-nylon; a butadiene-styrene copolymer, an acrylonitrile-styrene.
- Polystyrene resins such as copolymers, polystyrenes, styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, styrene-acrylic acid copolymers; polyethylene, polypropylene, ethylene-vinyl acetate copolymer saponified products
- Polyvinyl chloride resin such as polyvinyl chloride
- polyvinyl chloride resin such as polyvinyl chloride
- polyvinyl chloride resin such as polyvinyl chloride
- polyvinylidene chloride resin such as polyvinylidene chloride
- the thermoplastic resin is preferably a polyvinyl chloride resin, a polyvinylidene chloride resin or a polyolefin resin, and more preferably a polyvinyl chloride resin, a polyvinylidene chloride resin or polyethylene. It is a based resin.
- polyvinyl chloride resin a polyvinyl chloride resin having an average degree of polymerization of 700 to 1300 is preferable from the viewpoint of excellent moldability, heat resistance and fluidity during wrap film molding.
- the average degree of polymerization in the present specification means the average degree of polymerization measured according to JIS K6720-2.
- the polyvinyl chloride-based resin may be a vinyl chloride homopolymer (polyvinyl chloride resin) from the viewpoint of excellent mechanical properties, and for the purpose of imparting other properties, vinyl chloride and other copolymerizable therewith may be used. It may be a copolymer with a monomer.
- the copolymer may be a graft copolymer, a block copolymer or a random copolymer. Examples of other monomers include olefins such as ethylene, propylene and butene; vinyl esters of saturated acids such as vinyl acetate and vinyl laurate; alkyl esters of unsaturated acids such as methyl acrylate and methyl methacrylate; and lauryl.
- Alkyl vinyl ethers such as vinyl ethers; maleic acid, acrylonitrile, styrene, methylstyrene, vinylidene fluoride; and the like can be mentioned.
- the content of vinyl chloride units in the copolymer may be 10% by mass or more based on the total amount of monomer units, and is preferably 30 from the viewpoint of excellent mechanical properties. It is by mass% or more, more preferably 50% by mass or more.
- the upper limit of the content of the vinyl chloride unit in the copolymer is not particularly limited, and may be, for example, 99% by mass or less based on the total amount of the monomer units.
- the polyvinyl chloride resin may be, for example, a polymer blend with a three-dimensional polymer of acrylonitrile-butadiene-styrene, a post-treated product with alcohol or the like, or a post-treated product with a chlorine-containing compound.
- the content of the vinyl chloride unit in the polyvinyl chloride resin may be 10% by mass or more based on the total amount of the resin.
- the polyvinylidene chloride-based resin may be a vinylidene chloride homopolymer (polyvinylidene chloride resin), and is, for example, a copolymer containing vinylidene chloride and another monomer copolymerizable with vinylidene chloride as a monomer unit.
- Other monomers include vinyl chloride, acrylic acid ester of acrylic acid and alcohol having 1 to 8 carbon atoms, methacrylic acid ester of methacrylic acid and alcohol having 1 to 8 carbon atoms, vinyl ester of aliphatic carboxylic acid, and unsaturated. It may be an aliphatic carboxylic acid, an olefin, a vinyl ether or the like.
- the copolymer of vinylidene chloride and vinyl chloride belongs to the polyvinylidene chloride resin.
- the content of vinylidene chloride unit in the polyvinylidene chloride resin is, for example, 60% by mass or more, 70% by mass or more, or 80% by mass based on the total amount of monomer units from the viewpoint of moldability and heat resistance during wrap film molding. That may be the above.
- the upper limit of the content of vinylidene chloride unit in the polyvinylidene chloride resin is not particularly limited, and may be, for example, 99% by mass or less based on the total amount of monomer units.
- the content of vinylidene chloride units can be measured by a nuclear magnetic resonance (NMR) device.
- the weight average molecular weight of the polyvinylidene chloride resin may be, for example, 40,000 or more, 60,000 or more, or 80,000 or more, and may be 180,000 or less, 160000 or less, or 140000 or less.
- the weight average molecular weight of the polyvinylidene chloride resin can be measured by the GPC method using polystyrene having a known molecular weight as a standard substance.
- the conditions of the GPC method used for measuring the weight average molecular weight of polyvinylidene chloride resin are as follows.
- a Gel Chromatograph Alliance GPC2000 manufactured by Waters Co., Ltd. is used as a measuring device.
- a polyvinylidene chloride-based resin dissolved in tetrahydrofuran so as to be 0.5% by mass is used as a sample.
- Mobile phase Tetrahydrofuran Detector: Differential refractometer Flow rate: 1.0 mL / min Column temperature: 20 ° C Injection volume: 500 ⁇ L
- polystyrene-based resin examples include polyethylene-based resins, and the polyethylene-based resin includes low-density polyethylene, linear low-density polyethylene, linear ultra-low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene, and the like as monomer units. It may be a copolymer. Specifically, polyethylene-based resins have ethylene and 3 to 10 carbon atoms such as propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, and 1-octene.
- Vinyl esters such as ⁇ -olefins, vinyl acetate and vinyl propionate, unsaturated carboxylic acid esters such as methyl acrylate, ethyl acrylate, methyl methacrylate and ethyl methacrylate; unsaturated compounds such as conjugated diene and unconjugated diene; It may be a copolymer with one kind or two or more kinds selected from the above.
- the content of ethylene units in the polyethylene-based resin may be 50% by mass or more based on the total amount of monomer units.
- the content of the thermoplastic resin may be 70% by mass or more or 75% by mass or more, and is 85% by mass or less or 80% by mass or less, based on the total amount of the resin composition, from the viewpoint of excellent productivity during wrap film molding. It may be.
- the resin composition contains a compound having an ester group and an epoxy group (hereinafter, also referred to as "Compound A”) in addition to the thermoplastic resin.
- Compound A a compound having an ester group and an epoxy group
- the thermal stability of the resin composition is improved. It is presumed that the compound A can function as a plasticizer because it has an ester group, and can contribute to the improvement of the thermal stability of the resin composition by having an epoxy group.
- the molecular weight of compound A is 300 or more and 1500 or less. When the molecular weight of the compound A is in the above range, a wrap film having both cold resistance and low elution property can be obtained in addition to improving the thermal stability of the resin composition.
- the molecular weight of compound A is preferably 330 or more, more preferably 360 or more, still more preferably 390 or more, and may be 400 or more or 500 or more, from the viewpoint of further superiority in terms of low elution.
- the molecular weight of compound A is preferably 1400 or less, more preferably 1200 or less, still more preferably 1000 or less, from the viewpoint of further improving cold resistance.
- Compound A may be a compound represented by the following formula (1).
- R 1 and R 4 independently represent an alkyl group
- R 2 and R 3 each independently represent an alkylene group.
- m and n represent integers of 0 or more, and at least one of m and n is an integer of 1 or more.
- the alkyl group represented by R 1 may be linear or branched.
- the number of carbon atoms of the alkyl group represented by R 1 may be, for example, 2 or more, and is preferably 3 or more, 4 or more or 5 or more, and more preferably 6 or more from the viewpoint of further superiority in terms of low elution. ..
- the number of carbon atoms of the alkyl group represented by R 1 is, for example, 15 or less, 14 or less or 13 or less, preferably 12 or less, 11 or less, 10 or less or 9 or less from the viewpoint of further excellent cold resistance. It is preferably 8 or less.
- the alkyl group may be a linear alkyl group having 8 carbon atoms (n-octyl group) or a branched alkyl group having 8 carbon atoms.
- the alkylene group represented by R 2 or R 3 may be linear or branched.
- the carbon number of the alkylene group represented by R 2 or R 3 may be, for example, 2 or more, and from the viewpoint of further superiority in terms of low elution, it is preferably 3 or more, 4 or more or 5 or more, and more preferably 6. Above, more preferably 7, or more.
- the carbon number of the alkylene group represented by R 2 or R 3 may be, for example, 15 or less, 14 or less, or 13 or less, and is preferably 12 or less, 11 or less, from the viewpoint of further excellent cold resistance. It is 10 or less or 9 or less, more preferably 8 or less, still more preferably 7 or less.
- the alkylene group may be a linear alkylene group having 7 carbon atoms (n-heptylene group) or a branched alkylene group having 7 carbon atoms.
- the alkyl group represented by R 4 may be linear or branched.
- the number of carbon atoms in the alkyl group represented by R 4, for example, may be two or more, from the viewpoint of further excellent in low elution property, preferably 3 or more, 4 or more or 5 or more, more preferably 6 or more .
- the number of carbon atoms of the alkyl group represented by R 4, for example 15 or less, may be 14 or less or 13 or less, from the viewpoint of further excellent in cold resistance, preferably 12 or less, 11 or less, 10 or less, or It is 9 or less, more preferably 8 or less.
- the alkyl group may be a linear alkyl group having 7 carbon atoms (n-heptyl group) or a branched alkyl group having 7 carbon atoms.
- the branched alkyl group having 7 carbon atoms may be, for example, an alkyl group represented by the following formula (2).
- M may be an integer of 1 or more, 2 or more, or 3 or more, and may be an integer of 3 or less, 2 or less, or 1 or less.
- N may be an integer of 1 or more, 2 or more, or 3 or more, and may be an integer of 3 or less, 2 or less, or 1 or less.
- the compound A may be a compound represented by the following formula (1-1) (a compound in which m is 1 and n is 0 in the formula (1)).
- R 1, R 2 and R 4 are the same meanings as R 1, R 2 and R 4 in the formula (1).
- the compound A is a compound represented by the following formula (3) (in the formula (1-1), R 1 is an n-octyl group, R 2 is an n-heptylene group, and R 4 is a formula. It may be a compound which is an alkyl group represented by (2).
- the content of the compound A is preferably 2% by mass from the viewpoint of further excellent in terms of thermal stability of the resin composition and further excellent in terms of low elution and cold resistance of the wrap film, based on the total amount of the resin composition. 5% by mass or more, 8% by mass or more, 9% by mass or more, or 10% by mass or more, for example, 25% by mass or less or 20% by mass or less, and the viewpoint of excellent film forming property of the wrap film. Therefore, it is preferably 15% by mass or less, 14% by mass or less, 13% by mass or less, 12% by mass or less, or 11% by mass or less.
- Compound A is synthesized, for example, by reacting an unsaturated fatty acid with an aliphatic alcohol to obtain an ester having at least one carbon-carbon double bond, and then epoxidizing the carbon-carbon double bond. can do.
- the resin composition may further contain acetylated monoglyceride.
- the acetylated monoglyceride may be, for example, a compound in which two of the hydroxyl groups of glycerin are acetylated and the remaining one is esterified with a fatty acid.
- the fatty acid may be, for example, a fatty acid having 3 to 8 carbon atoms.
- the content of acetylated monoglyceride is 0.5% by mass or more, 0.7% by mass or more, 1% by mass or more, 1.5% by mass or more, 3% by mass or more, and 4% by mass or more based on the total amount of the resin composition. , Or 5% by mass or more, and may be 10% by mass or less, 9% by mass or less, or 8% by mass or less.
- the resin composition may further contain a polyvalent carboxylic acid ester.
- the polyvalent carboxylic acid ester is an ester of a polyvalent carboxylic acid and an alcohol.
- the polyvalent carboxylic acid may be, for example, a divalent to tetravalent carboxylic acid.
- the alcohol may be, for example, an aliphatic alcohol having 1 to 10 carbon atoms.
- the polyvalent carboxylic acid may be, for example, an aliphatic polyvalent carboxylic acid. That is, the polyvalent carboxylic acid ester may be an aliphatic polyvalent carboxylic acid ester which is an ester of an aliphatic polyvalent carboxylic acid and an alcohol.
- the aliphatic polyvalent carboxylic acid may be, for example, adipic acid. That is, the aliphatic polyvalent carboxylic acid ester may be, for example, a diester of adipic acid and an alcohol, a diester of adipic acid and an aliphatic alcohol having 1 to 10 carbon atoms, and dioctyl adipate. You can.
- the polyvalent carboxylic acid may be, for example, a hydroxy polyvalent carboxylic acid which is a polyvalent carboxylic acid having a hydroxyl group. That is, the polyvalent carboxylic acid ester may be a hydroxy polyvalent carboxylic acid ester which is an ester of a hydroxy polyvalent carboxylic acid and an alcohol.
- the hydroxy polyvalent carboxylic acid may be, for example, citric acid. That is, the hydroxy polyvalent carboxylic acid ester may be a triester of citric acid and an alcohol.
- the hydroxyl group of the hydroxypolyvalent carboxylic acid ester may be acetylated.
- the hydroxy polyvalent carboxylic acid ester may be an acetylated hydroxy polyvalent carboxylic acid ester, an acetylated citrate triester, or an acetylated citrate trialkyl ester.
- the acetylated citrate trialkyl ester may be, for example, acetylated tributyl citrate.
- the polyvalent carboxylic acid may be, for example, cyclohexane polyvalent carboxylic acid, which is a polyvalent carboxylic acid having a cyclohexane ring. That is, the polyvalent carboxylic acid ester may be a cyclohexane polyvalent carboxylic acid ester which is an ester of a cyclohexane polyvalent carboxylic acid and an alcohol.
- the cyclohexane polyvalent carboxylic acid may be, for example, a cyclohexanedicarboxylic acid.
- the cyclohexane polyvalent carboxylic acid ester may be a diester of cyclohexanedicarboxylic acid and an alcohol, or may be a cyclohexanedicarboxylic acid dialkyl ester.
- the cyclohexanedicarboxylic acid dialkyl ester may be, for example, a 1,2-cyclohexanedicarboxylic acid diisononyl ester.
- the content of the polyvalent carboxylic acid ester may be 1% by mass or more, 2% by mass or more, 3% by mass or more, 4% by mass or more, or 5% by mass or more based on the total amount of the resin composition, and is 15% by mass. Hereinafter, it may be 13% by mass or less, 10% by mass or less, 9% by mass or less, or 8% by mass or less.
- the resin composition may further contain an epoxidized vegetable oil.
- the epoxidized vegetable oil may be epoxidized soybean oil, epoxidized linseed oil, or the like.
- the content of the epoxidized vegetable oil may be 3% by mass or more, 4% by mass or more, or 5% by mass or more based on the total amount of the resin composition, and is 10% by mass or less, 9% by mass or less, or 8% by mass or less. It may be.
- the resin composition may further contain a glycerin fatty acid ester.
- the glycerin fatty acid ester may be, for example, an ester of glycerin and a saturated fatty acid such as stearic acid or an unsaturated fatty acid such as oleic acid.
- the glycerin fatty acid ester may be any of monoester, diester and triester.
- the content of the glycerin fatty acid ester may be 0.5% by mass or more, 1% by mass or more, or 1.5% by mass or more based on the total amount of the resin composition, and is 10% by mass or less, 7% by mass or less, or It may be 5% by mass or less.
- the resin composition may further contain other additives in addition to the thermoplastic resin, compound A and each of the above-mentioned additives.
- Other additives include antifogging agents, stabilizers (Ca / Zn-based stabilizers, etc.), colorants, plasticizers, lubricants, fillers, antistatic agents, antioxidants, mold release agents, and viscosity reducing agents. , Surfactants, fluorescent agents, surface treatment agents, cross-linking agents, processing aids, pressure-sensitive adhesives, antistatic agents, ultraviolet absorbers, anti-blocking agents and the like.
- the content (total content) of the other additives may be, for example, 1% by mass or more and 30% by mass or less.
- the resin composition is preferably used for wrap films. That is, one embodiment of the present invention is a wrap film provided with a layer made of the above resin composition.
- This wrap film is particularly preferably used for food packaging because it can reduce the amount of additives eluted into food. Further, since this wrap film is excellent in cold resistance, it is also suitable for use at a low temperature (for example, 0 ° C. or lower) such as frozen storage of food.
- the wrap film may consist of only one layer containing the thermoplastic resin and the compound A, or may consist of a plurality of layers.
- the wrap film may include, for example, a first surface layer, an intermediate layer, and a second surface layer in this order.
- the first and second surface layers contain a thermoplastic resin, compound A, and additives added as needed
- the intermediate layer contains a thermoplastic resin and additives added as needed. It may contain an agent.
- the wrap film may further include an adhesive layer containing an acid-modified polyolefin resin or the like in order to improve the adhesiveness between the layers, and a polyamide-based resin may be used to improve the heat resistance of the wrap film.
- a heat-resistant layer may be further provided.
- the thickness of the wrap film may be preferably 5 ⁇ m or more, more preferably 6 ⁇ m or more from the viewpoint of efficiently blocking food from the outside air, and preferably 25 ⁇ m or less, more preferably from the viewpoint of excellent handleability. It may be 12 ⁇ m or less.
- the total light transmittance of the wrap film is preferably 75% or more, more preferably 80% or more, and may be, for example, 90% or less from the viewpoint of excellent visibility.
- the thermoplastic resin, compound A, and, if necessary, the above-mentioned additives are mixed by a mixer such as a V-type blender, a ribbon blender, a Henschel mixer, and a super mixer, and further mixed if necessary. It is produced by kneading with a kneader such as a roll, a Banbury mixer, or a kneader to obtain a composition, and then, for example, extrusion molding. Specifically, the composition is supplied to the hopper of the extruder to obtain a target wrap film by an inflation method, a T-die method, or the like.
- a mixer such as a V-type blender, a ribbon blender, a Henschel mixer, and a super mixer, and further mixed if necessary. It is produced by kneading with a kneader such as a roll, a Banbury mixer, or a kneader to obtain a composition, and then, for example,
- the wrap film is composed of a plurality of layers
- the wrap film is obtained by putting the constituent raw materials of each layer into separate extruders, melt-extruding them, and co-extruding each layer by an inflation method, a T-die method, or the like to laminate them. Be done.
- a wrap film is formed into a product by being formed on a long length, wound, further rewound (rolled) at a desired length of 20 m, 50 m, etc., and packed in a box.
- the wrap film in the present embodiment may be in the form of a wrap film wound around a core, or may be in the form of a wrap film housed in a box.
- FIG. 1 is a perspective view showing a wrap film accommodating body according to an embodiment.
- the wrap film accommodating body 1 according to the embodiment includes a wrap film 2, a winding core 3 around which the wrap film is wound, and a box body 4 accommodating the wrap film 2 and the winding core 3. Is equipped with.
- the box body 4 may be provided with a blade portion 5 for cutting the wrap film 2.
- the materials of the winding core 3 and the box body 4 are not particularly limited. From the viewpoint of making it easy to recognize the color of the wrap film from the outside, at least a part of the box body 4 is preferably transparent or has holes to the extent that the function as a box is not impaired so that the inside can be visually recognized from the outside. It has become.
- a "film” is a thin flat product whose thickness is extremely small compared to its length and width and whose maximum thickness is arbitrarily limited, and which can be supplied in the form of a roll (necessary). If so, you can refer to the Japanese Industrial Standards JIS K6900).
- a "sheet” is a product that is thin by definition in JIS and whose thickness is generally small and flat for its length and width.
- the term "film” is used in the present specification to include the "sheet”. Even when referred to as, "film” shall be included.
- film is a concept including a wrap film in particular in the above definition.
- thermoplastic resins and additives resin compositions having the compositions shown in Tables 1 and 2 were prepared. Specifically, after putting each component into a super mixer, the material temperature was raised from room temperature to 130 ° C. while stirring, and the mixture was mixed to obtain a resin composition. The balance obtained by subtracting the total content of each component other than the polyvinyl chloride resin (thermoplastic resin) from 100% by mass is the content of the polyvinyl chloride resin (thermoplastic resin). Further, the content of each component means mass% in terms of solid content.
- Thermoplastic resin Polyvinyl chloride resin (manufactured by Taiyo PVC Co., Ltd., "TH-1000", average degree of polymerization: 1000)
- Additive A Compound represented by the following formula (3) (2-ethylpentane 9,10-epoxy octadecane acid, molecular weight: 396)
- Additive a1 Diisononyl adipate (molecular weight: 399)
- Additive a2 Polyester-based plasticizer (weight average molecular weight: 4080, adipic acid-based polyester)
- Additive B1 Eoxidized soybean oil additive
- B2 Acetylated monoglyceride additive
- B3 Glycerin fatty acid ester additive
- B4 Ca / Zn-based stabilizer
- the dynamic thermal stability time of 22 minutes or more was evaluated as "A”
- the case of 17 minutes or more and less than 22 minutes was evaluated as "B”
- the case of less than 17 minutes was evaluated as "C”.
- the results are shown in Tables 1 and 2. If the evaluation is A, the thermal stability is excellent, if the evaluation is B, the thermal stability is poor, and if the evaluation is C, the thermal stability is very poor.
- the obtained wrap film was cut into a width of 4 cm and a length of 11 cm and then folded in four to obtain a test piece having a width of 1 cm.
- the elastic modulus at low temperature was measured by performing a tensile test on the obtained test piece in an indoor environment of 0 ° C. and 0% humidity at a chuck distance of 5 cm, a speed of 50 mm / min, and a measurement distance of 20 mm. It can be said that the smaller the elastic modulus at low temperature, the better the cold resistance.
- the case where the elastic modulus was less than 900 Mpa was evaluated as "A”
- the case where the elastic modulus was 900 Mpa or more and less than 1000 Mpa was evaluated as "B”
- the case where the elastic modulus was 1000 Mpa or more was evaluated as "C”.
- the results are shown in Tables 1 and 2. If the evaluation is A, the cold resistance is very excellent, if the evaluation is B, the cold resistance is excellent, and if the evaluation is C, the cold resistance is poor.
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Abstract
Description
移動相:テトラヒドロフラン
検出器:示差屈折計
流速:1.0mL/分
カラム温度:20℃
注入量:500μL
添加剤A:下記式(3)で表される化合物(9,10-エポキシオクタデカン酸2-エチルペンタン、分子量:396)
添加剤a2:ポリエステル系可塑剤(重量平均分子量:4080、アジピン酸系ポリエステル)
添加剤B1:エポキシ化大豆油
添加剤B2:アセチル化モノグリセライド
添加剤B3:グリセリン脂肪酸エステル
添加剤B4:Ca/Zn系安定剤
得られた各樹脂組成物60gをラボプラストミル(株式会社東洋精機製作所製、「4C150-01」)に取り付けたローラミキサR60型に投入し、210℃、60rpmで混練し、動的熱安定性時間を測定することで、樹脂組成物の動的熱安定性を評価した。動的熱安定性時間は、定常トルクの数値から150%のトルク値に達するまでの時間とした。動的熱安定性時間が長いほど、熱安定性に優れている。動的熱安定性時間が22分間以上の場合を「A」、17分間以上22分間未満の場合を「B」、17分間未満の場合を「C」として評価した。結果を表1及び2に示す。評価がAであれば熱安定性が優れており、評価がBであれば熱安定性が悪く、評価がCであれば熱安定性が非常に悪いといえる。
各樹脂組成物について、70℃まで冷却した時点で取り出し、Tダイ(幅350mm、ギャップ0.4mm)を装着した直径40mm単軸押出機(L/D=20)にて、樹脂組成物の温度が200℃となる状態で押出し、厚み8μmのラップフィルムを作製した。
得られたラップフィルムを幅4cm、縦11cmに切り出した後4つ折にして、幅1cmの試験片を得た。得られた試験片を、0℃、湿度0%の室内環境下チャック間5cm、速度50mm/min、測定距離20mmで引っ張り試験を行うことで低温下の弾性率を測定した。この低温下の弾性率の数値が小さいほど耐寒性に優れるといえる。弾性率が900Mpa未満の場合を「A」、900Mpa以上1000Mpa未満の場合を「B」、1000Mpa以上の場合を「C」として評価した。結果を表1及び2に示す。評価がAであれば耐寒性が非常に優れており、評価がBであれば耐寒性が優れており、評価がCであれば耐寒性が悪いといえる。
一定面積の試料をラップフィルムから切り取り、その表面積1cm2当たり2mLのヘプタン溶液に25℃の温度で1時間浸漬し、溶液を蒸発乾固させ、その重量を測定することでフィルムからヘプタン溶液への移行量を求めた。当該移行量が少ないほど、添加剤の溶出量を抑制できるといえる。結果を表1及び2に示す。なお、熱安定性及び耐寒性に劣っている比較例2,4は、本評価の対象外とした。
Claims (17)
- 熱可塑性樹脂と、エステル基及びエポキシ基を有する化合物と、を含有し、
前記化合物の分子量が300以上1500以下である、樹脂組成物。 - 前記式(1)におけるmが1であり、nが0である、請求項2に記載の樹脂組成物。
- 前記式(1)におけるR1が炭素数3~12のアルキル基である、請求項3に記載の樹脂組成物。
- 前記式(1)におけるR2が炭素数3~12のアルキレン基である、請求項3又は4に記載の樹脂組成物。
- 前記式(1)におけるR4が炭素数3~12のアルキル基である、請求項3~5のいずれか一項に記載の樹脂組成物。
- 前記式(1)におけるR1が炭素数6~8のアルキル基である、請求項3~6のいずれか一項に記載の樹脂組成物。
- 前記式(1)におけるR2が炭素数6~8のアルキレン基である、請求項3~7のいずれか一項に記載の樹脂組成物。
- 前記式(1)におけるR4が炭素数6~8のアルキル基である、請求項3~8のいずれか一項に記載の樹脂組成物。
- 前記式(1)におけるR1が炭素数8のアルキル基である、請求項3~9のいずれか一項に記載の樹脂組成物。
- 前記式(1)におけるR2が炭素数7のアルキレン基である、請求項3~10のいずれか一項に記載の樹脂組成物。
- 前記式(1)におけるR4が炭素数7のアルキル基である、請求項3~11のいずれか一項に記載の樹脂組成物。
- 請求項1~14のいずれか一項に記載の樹脂組成物からなる層を備える、ラップフィルム。
- 食品の包装に用いられる、請求項15に記載のラップフィルム。
- 巻芯と、
前記巻芯に巻回された、請求項15又は16に記載のラップフィルムと、
前記巻芯及び前記フィルムを収容する箱体と、を備えるラップフィルム収容体。
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| JP2021515392A JP7261293B2 (ja) | 2019-04-24 | 2019-04-24 | 樹脂組成物、ラップフィルム及びラップフィルム収容体 |
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| JPH09176424A (ja) * | 1995-12-27 | 1997-07-08 | Shin Etsu Polymer Co Ltd | ストレッチフィルム |
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| CN103289242A (zh) * | 2013-06-21 | 2013-09-11 | 苏州新区佳合塑胶有限公司 | 抗菌pvc食品保鲜膜 |
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- 2019-04-24 JP JP2021515392A patent/JP7261293B2/ja active Active
- 2019-04-24 WO PCT/JP2019/017513 patent/WO2020217362A1/ja not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS425098B1 (ja) * | 1963-08-19 | 1967-03-02 | ||
| JPS53128650A (en) * | 1977-04-18 | 1978-11-09 | Mizusawa Industrial Chem | Stabilizer for chlorineecontaining polymers |
| JPS62148549A (ja) * | 1985-12-23 | 1987-07-02 | Denki Kagaku Kogyo Kk | ストレツチフイルム |
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| JP7261293B2 (ja) | 2023-04-19 |
| JPWO2020217362A1 (ja) | 2020-10-29 |
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