WO2017104673A1 - 樹脂組成物およびそれを用いた溶融成形品、ならびに多層構造体 - Google Patents
樹脂組成物およびそれを用いた溶融成形品、ならびに多層構造体 Download PDFInfo
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- WO2017104673A1 WO2017104673A1 PCT/JP2016/087098 JP2016087098W WO2017104673A1 WO 2017104673 A1 WO2017104673 A1 WO 2017104673A1 JP 2016087098 W JP2016087098 W JP 2016087098W WO 2017104673 A1 WO2017104673 A1 WO 2017104673A1
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- 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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- 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
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
-
- 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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
Definitions
- the present invention relates to a resin composition
- a resin composition comprising a saponified ethylene-vinyl ester copolymer (hereinafter sometimes abbreviated as “EVOH”), a melt-molded product using the same, and a multilayer structure. It is. More specifically, while maintaining transparency, the resin composition for obtaining a melt-molded product excellent in ultraviolet absorption effect and alcohol resistance of ultraviolet absorption effect and suppressed in odor generation, and the resin composition are used. And a multilayer structure including a resin composition layer made of a resin composition.
- EVOH saponified ethylene-vinyl ester copolymer
- Gas packaging properties particularly oxygen barrier properties are often required for packaging materials for packaging foods and various articles. This is in order to prevent the effects of oxidative deterioration of the package contents due to oxygen or the like, and to maintain the freshness of the food for a long time. For this reason, in the conventional packaging material, the gas barrier layer which prevents permeation
- Examples of the gas barrier layer generally provided in conventional packaging materials include a gas barrier layer made of an inorganic material and a gas barrier layer made of an organic material.
- a gas barrier layer made of an inorganic material a metal layer such as an aluminum foil or an aluminum vapor deposition layer, or a metal compound layer such as a silicon oxide vapor deposition layer or an aluminum oxide vapor deposition layer is used.
- a metal layer such as an aluminum foil or an aluminum vapor deposition layer has drawbacks such as invisible packaging contents and poor discardability.
- metal compound layers such as silicon oxide vapor deposition layers and aluminum oxide vapor deposition layers are cracked due to deformation during secondary processing such as printing and laminating, vibration and impact during transportation, deformation and dropping of packaging materials, etc. , There is a drawback that the gas barrier property is remarkably lowered.
- a gas barrier layer made of an organic material a layer made of a polyvinylidene chloride polymer or a layer made of a vinyl alcohol polymer such as polyvinyl alcohol or EVOH is used.
- the amount of polyvinylidene chloride polymer used has been greatly reduced in recent years because of the risk of generating harmful chlorine compounds when incinerated and discarded.
- a layer made of a vinyl alcohol polymer such as polyvinyl alcohol and EVOH is transparent, has a merit that cracking of the gas barrier layer is relatively difficult to occur, and there are few problems in terms of disposal, so it is widely used for packaging materials. Yes.
- the packaging material there is a multilayer structure in which a film layer obtained by melt-molding EVOH is used as an intermediate layer, and resin layers made of a thermoplastic resin are formed on both sides of the EVOH film layer as inner and outer layers.
- a multilayer structure is a film or sheet as a packaging material for food packaging materials, pharmaceutical packaging materials, industrial chemical packaging materials, agricultural chemical packaging materials, etc. by utilizing its excellent gas barrier properties and transparency.
- it is used by being molded into a container such as a bottle.
- the multilayer structure since the multilayer structure has excellent transparency, it transmits not only visible light but also ultraviolet rays, so that the problem of deterioration of the packaged contents due to ultraviolet rays may occur. is there.
- the food as the contents is exposed to UV-B and UV-C ultraviolet light having a wavelength region of less than 320 nm, and as a result, the food itself may be greatly altered.
- a water-soluble ultraviolet absorber to a resin film such as polyvinyl alcohol, which is a kind of film having gas barrier properties, the content is excellent in transparency and transmitted through ultraviolet rays.
- a technique for preventing photodegradation of light is proposed (see, for example, Patent Document 1).
- Patent Document 1 when used as a packaging material for a long time, the ultraviolet absorbent bleeds out due to the contents, resulting in a decrease in appearance, a decrease in ultraviolet absorption effect, and odor. Such problems may occur, and further improvement has been demanded.
- the present invention absorbs a wavelength in a specific ultraviolet region (for example, UV-B, UV-C having a wavelength of less than 320 nm) under such a background, and further reduces the ultraviolet absorption effect by the contents containing an alcohol component.
- a specific ultraviolet region for example, UV-B, UV-C having a wavelength of less than 320 nm
- Another object of the present invention is to provide a resin composition capable of forming a molded product free from odor problems and the like, a melt-molded product using the same, and a multilayer structure.
- the present invention relates to EVOH (A), cinnamic acid (B), and at least one of alkali metal salt (C1) and alkaline earth metal salt (C2) (wherein component (C) is cinnamic acid salt.
- the first gist is a resin composition containing
- this invention makes the 3rd summary the multilayer structure which has at least 1 layer of the resin composition layer which consists of the said resin composition as a 2nd summary, and the melt-molded article formed by melt-molding the said resin composition. To do.
- Saponified ethylene-vinyl ester copolymer A) Cinnamic acids (B) At least one of alkali metal salt (C1) and alkaline earth metal salt (C2) (C) (however, component (C) excludes cinnamate) ⁇ 2>
- the content of the cinnamic acid (B) is 0.0005 to 0.1 parts by weight with respect to 100 parts by weight of the ethylene-vinyl ester copolymer saponified product (A). Resin composition.
- the content of at least one of the alkali metal salt (C1) and the alkaline earth metal salt (C2) (C) is 100 parts by weight of the saponified ethylene-vinyl ester copolymer (A). ⁇ 1> or ⁇ 2>, wherein the content is 0.001 to 0.1 parts by weight in terms of metal.
- the weight ratio (B / C) of at least one of the cinnamic acids (B), the alkali metal salt (C1), and the alkaline earth metal salt (C2) (B / C) is 0.01 to 100.
- ⁇ 5> A melt-molded product obtained by melt-molding the resin composition according to any one of ⁇ 1> to ⁇ 4>.
- ⁇ 6> A multilayer structure having at least one resin composition layer comprising the resin composition according to any one of ⁇ 1> to ⁇ 4>.
- a wavelength in a specific ultraviolet region (for example, UV-B, UV-C having a wavelength of less than 320 nm) is absorbed, and further, an ultraviolet absorption effect is reduced by contents containing an alcohol component, an odor problem, etc. It is possible to provide a resin composition capable of forming a molded product that does not occur, a melt-molded product using the same, and a multilayer structure.
- EVOH (A) used in the present invention is usually a resin obtained by copolymerization of ethylene and a vinyl ester monomer and then saponification, and is a water-insoluble thermoplastic resin.
- the polymerization method any known polymerization method such as solution polymerization, suspension polymerization, and emulsion polymerization can be used. In general, solution polymerization using methanol as a solvent is used. Saponification of the obtained ethylene-vinyl ester copolymer can also be performed by a known method. That is, EVOH (A) used in the present invention mainly comprises an ethylene structural unit and a vinyl alcohol structural unit, and in some cases contains a slight amount of vinyl ester structural unit remaining without being saponified.
- vinyl ester-based monomer vinyl acetate is typically used because it is easily available from the market and has high efficiency in treating impurities during production.
- aliphatic vinyl esters such as vinyl formate, vinyl propionate, vinyl valerate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl caprate, vinyl laurate, vinyl stearate, vinyl versatate, and benzoic acid.
- aromatic vinyl esters such as vinyl acid, which are usually aliphatic vinyl esters having 3 to 20 carbon atoms, preferably 4 to 10 carbon atoms, and particularly preferably 4 to 7 carbon atoms. These are usually used alone, but a plurality of them may be used simultaneously as necessary.
- the content of the ethylene structural unit in EVOH (A) is a value measured based on ISO 14663, and is usually 20 to 60 mol%, preferably 25 to 50 mol%, particularly preferably 25 to 35 mol%. If the content is too small, the gas barrier property and melt moldability at high humidity tend to decrease, and conversely if too large, the gas barrier property tends to decrease.
- the saponification degree of the vinyl ester component in EVOH (A) is a value measured based on JIS K6726 (however, EVOH is a solution uniformly dissolved in water / methanol solvent), and usually 90 to 100 mol%.
- the amount is preferably 95 to 100 mol%, particularly preferably 99 to 100 mol%.
- the melt flow rate (MFR) (210 ° C., load 2160 g) of the EVOH (A) is usually 0.5 to 100 g / 10 minutes, preferably 1 to 50 g / 10 minutes, particularly preferably 3 to 35 g / 10. Minutes. If the MFR is too high, the film forming property tends to be lowered. Moreover, when MFR is too low, there exists a tendency for melt extrusion to become difficult.
- EVOH (A) used in the present invention may further contain structural units derived from the following comonomer within a range not inhibiting the effects of the present invention (for example, 10 mol% or less).
- the comonomer include olefins such as propylene, 1-butene, isobutene, 2-propen-1-ol, 3-buten-1-ol, 4-penten-1-ol, and 5-hexen-1-ol.
- Hydroxy group-containing ⁇ -olefins such as 3,4-dihydroxy-1-butene, 5-hexene-1,2-diol, and esterified products thereof, such as 3,4-diacyloxy-1-butene, especially 3 2,4-diacetoxy-1-butene, 2,3-diacetoxy-1-allyloxypropane, 2-acetoxy-1-allyloxy-3-hydroxypropane, 3-acetoxy-1-allyloxy-2-hydroxypropane, glycerol mono Vinyl ether, glycerin monoisopropenyl ether, etc., derivatives of acylated products, 2-methylenepropane-1 Hydroxyalkylvinylidenes such as 3-diol and 3-methylenepentane-1,5-diol, 1,3-diacetoxy-2-methylenepropane, 1,3-dipropionyloxy-2-methylenepropane, 1,3-dibuti Hydroxyalkyl vinyli
- EVOH (A) that has been “post-modified” such as urethanization, acetalization, cyanoethylation, oxyalkyleneation, and the like can also be used.
- EVOH (A) copolymerized with hydroxy group-containing ⁇ -olefins is preferable in terms of good secondary moldability, and among them, EVOH having a primary hydroxyl group in the side chain, particularly 1,2-diol. EVOH having in the side chain is preferred.
- EVOH (A) having a 1,2-diol in the side chain includes a 1,2-diol structural unit in the side chain.
- the 1,2-diol structural unit is specifically a structural unit represented by the following general formula (1).
- R 1 , R 2 and R 3 each independently represent a hydrogen atom or an organic group
- X represents a single bond or a bond chain
- R 4 , R 5 and R 6 each independently represent a hydrogen atom or an organic group.
- Examples of the organic group in the 1,2-diol structural unit represented by the general formula (1) include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a tert-butyl group.
- a saturated hydrocarbon group such as a group, an aromatic hydrocarbon group such as a phenyl group and a benzyl group, a halogen atom, a hydroxyl group, an acyloxy group, an alkoxycarbonyl group, a carboxyl group, and a sulfonic acid group.
- EVOH (A) contains a 1,2-diol structural unit represented by the above general formula (1), its content is usually 0.1 to 20 mol%, more preferably 0.1 to 15 mol%, especially Is preferably 0.1 to 10 mol%.
- EVOH (A) used in the present invention may be a mixture with other different EVOH, and as the other EVOH, those having different ethylene structural unit contents, represented by the general formula (1) Examples thereof include those having different contents of the represented 1,2-diol structural units, those having different degrees of saponification, those having different melt flow rates (MFR), and those having different other copolymerization components.
- cinnamic acids (B) are contained in EVOH (A).
- a wavelength in a specific ultraviolet region (for example, UV-B, UV-C having a wavelength of less than 320 nm) is absorbed, and further, an ultraviolet absorption effect is reduced by contents containing an alcohol component, an odor problem, etc.
- a resin composition capable of forming a molded product that does not occur is obtained.
- Cinnamic acid (B) used in the present invention includes cinnamic acid itself, as well as cinnamic acid derivatives such as cinnamic acid alcohol, cinnamic acid ester, and cinnamic acid salt. Among these, it is optimal to use cinnamic acid itself.
- cinnamic acid include cis-cinnamic acid and trans-cinnamic acid, and trans-cinnamic acid is preferably used from the viewpoint of stability and cost.
- cinnamate examples include alkali metal cinnamate such as lithium cinnamate, sodium cinnamate, and potassium cinnamate, and alkaline earth metal cinnamate such as magnesium cinnamate, calcium cinnamate, and barium cinnamate. From the viewpoint of the thermal stability of the resin composition, an alkali metal cinnamate is preferably used.
- the content of the cinnamic acids (B) is preferably 0.0005 to 0.1 parts by weight, more preferably 0.001 to 0.08 parts by weight, with respect to 100 parts by weight of EVOH (A). More preferably, the amount is 0.0015 to 0.05 parts by weight, particularly preferably 0.005 to 0.03 parts by weight, and particularly preferably 0.01 to 0.02 parts by weight. If the content is too small, the ultraviolet absorption effect tends to decrease, and if the content is too large, odor generation during melt molding tends to be a problem.
- the content of cinnamic acids (B) in the resin composition in the present invention can be measured using liquid chromatography mass spectrometry (LC / MS / MS).
- LC / MS / MS liquid chromatography mass spectrometry
- Cinnamic acid (10.89 mg) is weighed into a 10 mL volumetric flask and dissolved in methanol to give a 10 mL solution (standard stock solution; 1089 ⁇ g / mL). Subsequently, the prepared standard stock solution was diluted with methanol, and each mixed standard (0.109 ⁇ g / mL, 0.218 ⁇ g / mL, 0.545 ⁇ g / mL, 1.09 ⁇ g / mL, 2.18 ⁇ g / mL) was mixed. Prepare the solution. LC / MS / MS analysis is performed using these mixed standard solutions, and a calibration curve is created.
- sample solution preparation of sample solution
- (1) After weighing the resin composition (1 g) of the present invention into a 10 mL volumetric flask, 9 mL of methanol is added.
- (3) Add methanol to make a constant volume of 10 mL (sample solution (I)).
- methanol is added to make a constant volume of 10 mL (sample solution (II)).
- the liquid obtained by filtering the sample solution (I) or the sample solution (II) with a polytetrafluoroethylene (PTFE) filter (pore size 0.45 ⁇ m) is used for LC / MS / MS analysis as a measurement solution.
- PTFE polytetrafluoroethylene
- EVOH (A) contains at least one of alkali metal salt (C1) and alkaline earth metal salt (C2) (C).
- cinnamic acids (B) in EVOH (A), in particular cinnamic acid partially react with at least one of alkali metal salt (C1) and alkaline earth metal salt (C2) (C).
- alkali metal salt (C1) and alkaline earth metal salt (C2) C
- at least one (C) of the alkali metal salt (C1) and the alkaline earth metal salt (C2) may be any salt that can form cinnamate.
- the alkali metal salt (C1) and alkaline earth metal salt (C2) used in the present invention are those excluding the cinnamate described above, and are preferably water-soluble salts from the viewpoint of the productivity of the resin composition.
- alkali metal salt (C1) and alkaline earth metal salt (C2) used in the present invention include lithium, sodium, potassium, rubidium, cesium and the like as the alkali metal, and beryllium, magnesium and calcium as the alkaline earth metal. , Barium, strontium, radium and the like, and these can be used alone or in combination.
- alkali metals include sodium and potassium.
- the alkaline earth metal is preferably magnesium or calcium. Particularly preferred is sodium.
- the alkali metal salt (C1) and alkaline earth metal salt (C2) used in the present invention are inorganic such as carbonate, hydrogen carbonate, phosphate, borate, sulfate, chloride, etc. It may be a salt, a monocarboxylate having 2 to 11 carbon atoms (acetate, butyrate, propionate, enanthate, caprate, etc.), dicarboxylate having 2 to 11 carbon atoms (shu Acid salts, malonates, succinates, adipates, suberates, sebates, etc., monocarboxylates having 12 or more carbon atoms (laurate, palmitate, stearate, 12 hydroxystearate) Acid salt, behenate salt, montanate salt), and organic acid salt such as citrate.
- a monocarboxylate having 2 to 11 carbon atoms acetate, butyrate, propionate, enanthate, caprate, etc.
- organic acid salts more preferred are monocarboxylic acid salts having 2 to 4 carbon atoms, which are water-soluble low molecular weight compounds, particularly preferred are acetates and propionates, and most preferred are acetates. is there.
- the content of at least one of the alkali metal salt (C1) and the alkaline earth metal salt (C2) (C) is 0.001 to 0.1 parts by weight in terms of metal with respect to 100 parts by weight of EVOH (A).
- the amount is preferably 0.005 to 0.05 parts by weight, more preferably 0.008 to 0.025 parts by weight.
- the content of at least one of alkali metal salt (C1) and alkaline earth metal salt (C2) (C) in EVOH (A) can be calculated by quantifying each metal by an atomic absorption method.
- the sample for atomic absorption analysis for example, precisely weighs the dried resin composition, puts it in a constant weight platinum evaporating dish, carbonizes it with an electric heater, then heats it with a gas burner, bakes until smoke does not occur, Further, put the platinum evaporating dish in an electric furnace, raise the temperature and completely incinerate. After cooling, add hydrochloric acid and pure water to the incinerated product, heat it with an electric heater to dissolve, It is possible to prepare a sample for atomic absorption analysis by pouring and making the volume constant with pure water.
- the weight ratio (B / C) of cinnamic acid (B) and at least one of alkali metal salt (C1) and alkaline earth metal salt (C2) used in the present invention (B / C) is 0.01 to 100. It is preferably 0.1 to 50, more preferably 0.5 to 10, particularly preferably 1 to 5. If the weight ratio (B / C) is too low, the ultraviolet absorption effect tends to decrease, and if it is too high, the alcohol resistance effect of the ultraviolet absorption effect tends to decrease.
- thermoplastic resin (D) contains, as a resin component, other thermoplastic resin (D) in addition to EVOH (A) within a range that is usually 30% by weight or less with respect to EVOH (A). May be.
- thermoplastic resin (D) examples include linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, ethylene- ⁇ -olefin ( ⁇ -olefin having 4 to 20 carbon atoms) copolymer, ethylene-acrylate copolymer, polypropylene, propylene- ⁇ -olefin ( ⁇ -olefin having 4 to 20 carbon atoms) copolymer, polybutene Olefins such as polypentene or copolymers, polycyclic olefins, or polyolefin resins and polystyrene resins in a broad sense such as those obtained by graft-modifying these olefins alone or copolymers with unsaturated carboxylic acids or esters thereof , Polyester, polyamide, copolymerized polyamide, polychlorinated Cycloalkenyl, polyvinylidene
- the EVOH (A) layer is formed at the end of the packaging material after the hot water treatment of the packaging material.
- a polyamide-based resin for the purpose of preventing elution.
- the polyamide-based resin can form a network structure by the interaction of the amide bond with the OH group and / or ester group of EVOH (A), thereby preventing elution of EVOH during hydrothermal treatment. be able to. Therefore, when the resin composition of the present invention is used as a packaging material for retort food or boiled food, it is preferable to blend a polyamide-based resin.
- polyamide resins can be used. Specifically, for example, polycapramide (nylon 6), poly- ⁇ -aminoheptanoic acid (nylon 7), poly- ⁇ -aminononanoic acid (nylon 9), polyundecanamide (nylon 11), polylauryl lactam (nylon 12) ) And the like.
- copolymerized polyamide resin examples include polyethylene diamine adipamide (nylon 26), polytetramethylene adipamide (nylon 46), polyhexamethylene adipamide (nylon 66), polyhexamethylene sebamide (nylon).
- terminal-modified polyamide resins may be used, and terminal-modified polyamide resins are preferable.
- the terminal-modified polyamide resin is, for example, a terminal-modified polyamide resin modified with a hydrocarbon group having 1 to 22 carbon atoms, and a commercially available one may be used.
- the number of terminal COOH groups [X] of the terminal-modified polyamide-based resin and the terminal CONR 1 R 2 group (where R 1 is a hydrocarbon group having 1 to 22 carbon atoms, R 2 is a hydrogen atom or Number [Y] of the hydrocarbon group having 1 to 22 carbon atoms, 100 ⁇ Y / (X + Y) ⁇ 5
- a terminal-modified polyamide resin satisfying the above is used.
- the above-mentioned terminal-modified polyamide resin is obtained by N-substituted amide modification of a normal unmodified polyamide resin with a terminal adjusting agent, and is based on the total number of carboxyl groups contained in the polyamide resin before modification. Is a polyamide-based resin modified by 5% or more. If the amount of modification is too small, there will be a large amount of carboxyl groups in the polyamide-based resin, and such carboxyl groups will react with EVOH during melt molding to generate gels, etc., and the appearance of the resulting film tends to be poor. Tend.
- Such a terminal-modified polyamide resin can be produced, for example, by the method described in Japanese Patent Publication No. 8-19302.
- the EVOH / polyamide resin content ratio is usually 99/1 to 70/30 by weight, preferably 97/3 to 75/25. Particularly preferred is 95/5 to 85/15.
- the weight ratio of the polyamide-based resin is too large, long run moldability and gas barrier properties tend to be lowered.
- the weight ratio of the polyamide-based resin is too small, the EVOH elution suppression effect after the hot water treatment tends to decrease.
- the resin composition of the present invention includes EVOH (A) (if desired, other thermoplastic resin (D)), cinnamic acids (B), alkali metal salts (C1) and alkalis.
- EVOH if desired, other thermoplastic resin (D)
- B cinnamic acids
- C1 alkali metal salts
- alkalis if desired, alkalis, an inorganic filler (E) may further be contained.
- said inorganic filler (E) is a plate-shaped inorganic filler from the point of exhibiting more gas-barrier property, for example, the kaolin which consists of a hydrous aluminum silicate as a main component, and particle
- grains are plate-shaped, layered Examples thereof include mica and smectite, which are silicate minerals, and talc composed of magnesium hydroxide and silicate. Of these, kaolin is preferably used. The type of kaolin is not particularly limited and may or may not be calcined, but calcined kaolin is preferred.
- the gas barrier property of the resin composition of the present invention is further improved by blending the inorganic filler (E).
- the inorganic filler (E) in particular, in the case of a plate-like inorganic filler, since it has a multilayer structure, in the case of film formation, the plate-like surface of the plate-like inorganic filler is easily oriented in the surface direction of the film. Thus, it is presumed that the plate-like inorganic filler oriented in the plane direction particularly contributes to oxygen shielding of the resin composition layer (for example, film).
- the content of the inorganic filler (E) is usually 1 to 20% by weight, preferably 3 to 18% by weight, and more preferably 5 to 15% by weight with respect to EVOH (A). If the content is too small, the effect of improving the gas barrier property tends to decrease, and if it is too large, the transparency tends to decrease.
- the resin composition of the present invention includes EVOH (A), cinnamic acids (B), alkali metal salts (C1) and alkaline earth metal salts (for the purpose of improving gas barrier properties after hydrothermal treatment (retort treatment).
- EVOH cinnamic acids
- C1 alkali metal salts
- alkaline earth metal salts for the purpose of improving gas barrier properties after hydrothermal treatment (retort treatment).
- an oxygen absorbent (F) may be further contained.
- the oxygen absorbent (F) is a compound that captures oxygen more quickly than the packaged contents. Specifically, an inorganic oxygen absorbent, an organic oxygen absorbent, a composite oxygen absorbent using an inorganic catalyst (transition metal catalyst) and an organic compound in combination, and the like can be given. Such an oxygen absorbent (F) usually does not contain at least one of the alkali metal salt (C1) and the alkaline earth metal salt (C2) (C).
- the inorganic oxygen absorbent examples include metals and metal compounds, which absorb oxygen when they react with oxygen.
- a metal Fe, Zn, Al, Ni, Sn, etc.
- iron typically iron.
- the iron powder any known iron powder, such as reduced iron powder, atomized iron powder, electrolytic iron powder, etc. can be used without particular limitation, regardless of its production method.
- the iron used may be obtained by reducing iron once oxidized.
- the metal compound is preferably an oxygen deficient metal compound.
- the oxygen-deficient metal compound include cerium oxide (CeO 2 ), titanium oxide (TiO 2 ), and zinc oxide (ZnO). These oxides are reduced by oxygen from the crystal lattice by reduction treatment. It is pulled out to be in an oxygen deficient state and exhibits oxygen absorbing ability by reacting with oxygen in the atmosphere.
- Such metals and metal compounds also preferably contain a metal halide or the like as a reaction accelerator.
- Examples of the organic oxygen absorber include a hydroxyl group-containing compound, a quinone compound, a double bond-containing compound, and an oxidizable resin. Oxygen can be absorbed when oxygen reacts with a hydroxyl group or a double bond contained therein.
- As the organic oxygen absorber ring-opening polymers of cycloalkenes such as polyoctenylene, conjugated diene polymers such as butadiene, and cyclized products thereof are preferable.
- the content of such oxygen absorbent (F) is usually 1 to 30% by weight, preferably 3 to 25% by weight, more preferably 5 to 20% by weight, based on EVOH (A). is there.
- the resin composition of the present invention if necessary, within a range not impairing the effects of the present invention (for example, at 5% by weight or less of the entire resin composition), ethylene glycol, Plasticizers such as aliphatic polyhydric alcohols such as glycerin and hexanediol; higher fatty acids (for example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, etc.), higher fatty acid esters (methyl esters of higher fatty acids, Isopropyl ester, butyl ester, octyl ester, etc.), higher fatty acid amides (saturated aliphatic amides such as stearic acid amide and behenic acid amide), unsaturated fatty acid amides such as oleic acid amide and erucic acid amide, ethylene bis stearic acid,
- Plasticizers such as aliphatic polyhydric alcohols such as
- the base resin in the entire resin composition of the present invention is EVOH (A). Therefore, the amount of EVOH (A) is usually 70% by weight or more, preferably 80% by weight or more, and particularly preferably 90% by weight or more based on the entire resin composition. When the amount is too large, the blending effect of the above (B), (C), (D), (E), (F), (G) (including the case where these are used in combination) tends to be reduced, When the amount is too small, the gas barrier property tends to decrease.
- the resin composition of the present invention includes, for example, 1) a porous precipitate of EVOH (A) having a water content of 20 to 80% by weight, cinnamic acid (B), alkali metal salt (C1), and alkaline earth metal salt ( C2) is brought into contact with an aqueous dispersion containing at least one of (C), and EVOH (A) is subjected to at least one of cinnamic acid (B), alkali metal salt (C1) and alkaline earth metal salt (C2) (C 2) a method of drying after containing 2) a uniform solution (water / alcohol solution, etc.) of EVOH (A) at least of cinnamic acid (B), alkali metal salt (C1) and alkaline earth metal salt (C2)
- a porous precipitate of EVOH (A) having a water content of 20 to 80% by weight cinnamic acid (B), alkali metal salt (C1), and alkaline earth metal salt ( C2)
- the dispersibility of at least one of cinnamic acid (B), alkali metal salt (C1) and alkaline earth metal salt (C2) (C) is excellent 1), 2) Or the method of 5) is preferable.
- substantially pellet-like EVOH is stirred and dispersed mechanically or with hot air
- substantially pellet-like EVOH (A) gives dynamic effects such as stirring and dispersion.
- a dryer for performing fluidized drying a cylindrical / groove-type stirred dryer, a circular tube dryer, a rotary dryer, a fluidized bed dryer, a vibrating fluidized bed dryer
- a conical rotary dryer, etc., and a dryer for performing static drying a batch box dryer as a stationary material type, a band dryer, a tunnel dryer as a material transfer type, A vertical dryer etc. can be mentioned. It is also possible to combine fluidized drying and stationary drying.
- the heating gas used in the drying process air or an inert gas (nitrogen gas, helium gas, argon gas, etc.) is used, and the temperature of the heating gas is 40 to 150 ° C., and productivity and EVOH ( A) is preferable in terms of preventing thermal deterioration.
- the drying treatment time depends on the water content of EVOH (A) and its treatment amount, but usually about 15 minutes to 72 hours is preferable from the viewpoint of productivity and prevention of thermal degradation of EVOH (A).
- the melt kneading temperature is usually 150 to 300 ° C, preferably 170 to 250 ° C.
- the resin composition obtained by the above methods 1) to 5) can be directly melt-molded after melt-kneading the raw materials, from the viewpoint of industrial handling, the resin composition after melt-kneading It is preferable to prepare a pellet made of the composition and subject it to a melt molding method to obtain a melt molded product. From the viewpoint of economy, a method of melt-kneading using an extruder, extruding into a strand, and cutting and pelletizing is preferable.
- the shape of the pellet includes, for example, a spherical shape, a cylindrical shape, a cubic shape, a rectangular parallelepiped shape, etc., but is usually a spherical shape (rugby ball shape) or a cylindrical shape, and its size is convenient when used as a molding material later.
- the diameter is usually 1 to 6 mm, preferably 2 to 5 mm
- the height is usually 1 to 6 mm, preferably 2 to 5 mm.
- the length is 1 to 6 mm, preferably 2 to 5 mm, and the length is usually 1 to 6 mm, preferably 2 to 5 mm.
- the water content of the resin composition or pellet is preferably 0.001 to 5% by weight (more preferably 0.01 to 2% by weight, particularly 0.1 to 1% by weight). If the rate is too low, the long-run moldability tends to be lowered. Conversely, if the rate is too high, foaming may occur during extrusion molding, which is not preferable.
- the melt-molded product of the present invention is obtained by melt-molding the resin composition of the present invention.
- the resin composition of the present invention can be formed into, for example, a film, a cup, a bottle, or the like by a melt molding method.
- the melt molding method include extrusion molding methods (T-die extrusion, inflation extrusion, blow molding, melt spinning, profile extrusion, etc.), injection molding methods, and the like.
- the melt molding temperature is usually appropriately selected from the range of 150 to 300 ° C.
- “film” is not particularly distinguished from “sheet” and “tape”, but is described as meaning including these.
- the melt-molded product containing the resin composition of the present invention may be used as it is for various applications.
- the thickness of the resin composition layer is usually 1 to 5000 ⁇ m, preferably 5 to 4000 ⁇ m, particularly preferably 10 to 3000 ⁇ m.
- the multilayer structure of the present invention has at least one layer composed of the resin composition of the present invention.
- a layer composed of the resin composition of the present invention (hereinafter simply referred to as “resin composition layer” refers to a layer composed of the resin composition of the present invention) is laminated with another substrate to further increase the strength. It can be raised and other functions can be added.
- thermoplastic resin other than EVOH (hereinafter referred to as “other thermoplastic resin (H)”) is preferably used.
- the layer structure of the multilayer structure is such that the resin composition layer of the present invention is ⁇ ( ⁇ 1, ⁇ 2,%) And the other thermoplastic resin (H) layers are ⁇ ( ⁇ 1, ⁇ 2,). , ⁇ / ⁇ , ⁇ / ⁇ / ⁇ , ⁇ / ⁇ / ⁇ , ⁇ 1 / ⁇ 2 / ⁇ , ⁇ / ⁇ 1 / ⁇ 2, ⁇ 2 / ⁇ 1 / ⁇ / ⁇ 1 / ⁇ 2, ⁇ 2 / ⁇ 1 / ⁇ / ⁇ 1 / ⁇ 2, ⁇ 2 / ⁇ 1 / ⁇ / ⁇ 1 / ⁇ / ⁇ 1 Any combination such as / ⁇ 2 is possible.
- R is a recycled layer containing a mixture of the resin composition of the present invention and a thermoplastic resin, which is obtained by remelt molding an edge portion or a defective product generated in the process of producing the multilayer structure, ⁇ / R / ⁇ , ⁇ / R / ⁇ / ⁇ , ⁇ / R / ⁇ / R / ⁇ , ⁇ / ⁇ / R / ⁇ / ⁇ , ⁇ / R / ⁇ / R / ⁇ / R ⁇ , etc.
- the number of layers of the multilayer structure of the present invention is generally 2 to 15 layers, preferably 3 to 10 layers in total.
- an adhesive resin layer may be interposed between the respective layers as necessary.
- the layer structure of the multilayer structure preferably includes the resin composition layer of the present invention as an intermediate layer, and other thermoplastic resin (H) layers as both outer layers of the intermediate layer.
- a multilayer structure comprising at least the basic unit as a constituent unit with the unit of the provided layer structure ( ⁇ / ⁇ / ⁇ or ⁇ / adhesive resin layer / ⁇ / adhesive resin layer / ⁇ ) as a basic unit is preferred. .
- thermoplastic resin (H) examples include linear low density polyethylene, low density polyethylene, ultra low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-propylene (block and random) copolymer, Polyethylene resins such as ethylene- ⁇ -olefin ( ⁇ -olefin having 4 to 20 carbon atoms) copolymer, polypropylene such as polypropylene and propylene- ⁇ -olefin ( ⁇ -olefin having 4 to 20 carbon atoms) copolymer (Unmodified) polyolefin resins such as resins, polybutenes, polypentenes, polycyclic olefin resins (polymers having a cyclic olefin structure in the main chain and / or side chain), and these polyolefins as unsaturated carboxylic acids or their Unsaturated carboxylic acid-modified polyolefin graft-modified with ester Broadly defined polyolefin resins including modified olefin
- polyamide resins, polyolefin resins, polyester resins, and polystyrene resins, which are hydrophobic resins, are preferable, and polyethylene resins, polypropylene resins, and polycyclic olefins are more preferable.
- Polyolefin resins such as these and other unsaturated carboxylic acid-modified polyolefin resins, and in particular, polycyclic olefin resins are preferably used as hydrophobic resins.
- thermoplastic resin which is the said adhesive resin layer forming material
- a well-known thing can be used, if it selects suitably according to the kind of thermoplastic resin used for the other thermoplastic resin (H) used as a base material.
- a typical example is a modified polyolefin polymer containing a carboxyl group obtained by chemically bonding an unsaturated carboxylic acid or an anhydride thereof to a polyolefin resin by an addition reaction or a graft reaction.
- maleic anhydride graft modified polyethylene maleic anhydride graft modified polypropylene, maleic anhydride graft modified ethylene-propylene (block and random) copolymer, maleic anhydride graft modified ethylene-ethyl acrylate copolymer, maleic anhydride graft
- examples thereof include a modified ethylene-vinyl acetate copolymer, a maleic anhydride-modified polycyclic olefin resin, a maleic anhydride graft-modified polyolefin resin, and the like. These can be used alone or in combination of two or more.
- thermoplastic resin (H) base resin
- adhesive resin layer are conventionally known within a range that does not impair the gist of the present invention (for example, 30% by weight or less, preferably 10% by weight or less).
- Plasticizers, fillers, clays (montmorillonite, etc.), colorants, antioxidants, antistatic agents, lubricants, core materials, antiblocking agents, ultraviolet absorbers, waxes and the like may be included.
- a lamination method in the case of producing a multilayer structure by laminating the resin composition of the present invention with another substrate (other thermoplastic resin (H)) (including the case where an adhesive resin layer is interposed) is known. It can be done by the method.
- a method of melt extrusion laminating another substrate to the film, sheet or the like of the resin composition of the present invention conversely, a method of melt extrusion laminating the resin composition of the present invention to another substrate, the resin composition of the present invention A film (layer) and another substrate (layer) comprising the resin composition of the present invention, and an organic titanium compound, an isocyanate compound, and a polyester compound.
- the co-extrusion method is preferable from the viewpoint of cost and environment.
- the multilayer structure is then subjected to a (heating) stretching process as necessary.
- the stretching treatment may be either uniaxial stretching or biaxial stretching, and in the case of biaxial stretching, it may be simultaneous stretching or sequential stretching.
- a roll stretching method a tenter stretching method, a tubular stretching method, a stretching blow method, a vacuum / pressure forming method, or the like having a high stretching ratio can be employed.
- the stretching temperature is usually selected from the range of about 40 to 170 ° C., preferably about 60 to 160 ° C. If the stretching temperature is too low, the stretchability becomes poor, and if it is too high, it becomes difficult to maintain a stable stretched state.
- heat fixation may then be performed for the purpose of imparting dimensional stability after stretching.
- the heat setting can be carried out by a known means.
- the stretched multilayer structure is usually heat-treated at 80 to 180 ° C., preferably 100 to 165 ° C., usually for 2 to 600 seconds while maintaining a tension state. To do.
- the multilayer stretched film obtained using the resin composition of this invention as a film for shrink, in order to provide heat shrinkability, it does not perform said heat setting, for example to the film after extending
- stretching What is necessary is just to perform processing, such as applying cold air and cooling and fixing.
- a cup or tray-like multilayer container from the multilayer structure of the present invention.
- a method for producing the multi-layer container usually a drawing method is employed, and specifically, a vacuum forming method, a pressure forming method, a vacuum / pressure forming method, a plug assist type vacuum / pressure forming method and the like can be mentioned.
- a blow molding method is adopted, specifically, an extrusion blow molding method (double-head type, mold transfer type).
- the multilayer structure of the present invention is optionally subjected to heat treatment, cooling treatment, rolling treatment, printing treatment, dry laminating treatment, solution or melt coating treatment, bag making processing, deep drawing processing, box processing, tube processing, split processing, etc. Can be done.
- the thickness of the multilayer structure (including stretched ones) of the present invention and further the thickness of the resin composition layer, the other thermoplastic resin (H) layer and the adhesive resin layer constituting the multilayer structure, It is appropriately set according to the type of thermoplastic resin, the type of adhesive resin, the application and packaging form, the required physical properties, and the like.
- the following numerical value is the sum of the thicknesses of the same kind of layers when there are two or more kinds of resin composition layers, adhesive resin layers, and other thermoplastic resin (H) layers. It is the value.
- the total thickness of the multilayer structure of the present invention (including the stretched structure) is usually 10 to 5000 ⁇ m, preferably 30 to 3000 ⁇ m, particularly preferably 50 to 2000 ⁇ m.
- the gas barrier property may be lowered.
- the gas barrier property becomes excessive performance, and unnecessary raw materials tend to be used, which tends to be uneconomical.
- the resin composition layer is usually 1 to 500 ⁇ m, preferably 3 to 300 ⁇ m, particularly preferably 5 to 200 ⁇ m, and the other thermoplastic resin (H) layer is usually 5 to 30000 ⁇ m, preferably 10 to 20000 ⁇ m, particularly The thickness is preferably 20 to 10,000 ⁇ m, and the adhesive resin layer is usually 0.5 to 250 ⁇ m, preferably 1 to 150 ⁇ m, particularly preferably 3 to 100 ⁇ m.
- the ratio of the thickness of the resin composition layer to the other thermoplastic resin (H) layer in the multilayer structure is the most when there are a plurality of layers.
- the ratio of the thick layers is usually 1/99 to 50/50, preferably 5/95 to 45/55, particularly preferably 10/90 to 40/60.
- the thickness ratio of the resin composition layer to the adhesive resin layer in the multilayer structure is usually 10 by the ratio of the thickest layers when there are a plurality of layers. / 90 to 99/1, preferably 20/80 to 95/5, particularly preferably 50/50 to 90/10.
- Containers and lids made of bags and cups made of stretched films, trays, tubes, bottles, etc., as described above, as well as seasonings such as mayonnaise and dressing, miso, etc. It is useful as a container for various packaging materials for fermented foods, fats and oils such as salad oil, beverages, cosmetics, and pharmaceuticals.
- the layer made of the resin composition of the present invention is not only highly transparent, but also excellent in absorption performance of wavelengths in a specific ultraviolet region (for example, UV-B, UV-C having a wavelength of less than 320 nm), and further contains an alcohol component. Because the content of the contents contained does not reduce the UV absorption effect and odor problems, etc., general foods, seasonings such as mayonnaise and dressings, fermented foods such as miso, fats and oils such as salad oil, soups and beverages It is useful as various containers such as cosmetics, pharmaceuticals, detergents, cosmetics, industrial chemicals, agricultural chemicals and fuels.
- semi-solid foods and seasonings such as mayonnaise, ketchup, sauce, miso, wasabi, mustard, grilled meat, etc.
- liquid beverages such as salad oil, mirin, juice, tea, sports drinks, mineral water, milk, etc.
- bottles and tubes for seasonings, cups for semi-solid foods and seasonings such as fruit, jelly, pudding, yogurt, mayonnaise, miso, processed rice, cooked food, soup, raw meat, It is useful as a packaging material for processed meat products (ham, bacon, wiener, etc.), cooked rice, wide-mouth containers for pet food, and more preferably, containers for alcoholic beverages such as sake, beer, wine, alcohol fuels ( It is useful as a material for tanks for biofuels.
- EVOH (a1) [content of ethylene structural unit: 29 mol%, saponification degree: 99.6 mol%, MFR: 8.8 g / 10 min (210 ° C., load: 2160 g)] was used.
- the EVOH (a1) in the form of pellets is dipped in an aqueous solution containing sodium acetate (c1) and then dried. Finally, the moisture content of the resin composition pellets is 0.2% by weight with respect to the resin composition.
- Sodium acetate An alkali metal salt-containing EVOH resin containing 110 ppm of (c1) in terms of sodium was obtained. That is, this resin contains 0.011 part of sodium acetate (c1) in terms of sodium with respect to 100 parts of EVOH (a1).
- the content of sodium acetate (c1) was calculated by ashing the alkali metal salt-containing EVOH resin, dissolving in an aqueous hydrochloric acid solution, and quantifying sodium by atomic absorption spectrometry.
- Cinnamic acid (b1) As cinnamic acid (B), cinnamic acid (b1) manufactured by Wako Pure Chemical Industries, Ltd. was used. Cinnamic acid (b1) was blended to 0.0155 part with respect to 100 parts of EVOH (a1) in the alkali metal salt-containing EVOH resin produced by the above procedure, and dry blended. This was melt-kneaded for 5 minutes under the conditions of 230 ° C. and 50 rpm using a plastograph manufactured by Brabender, to prepare a resin composition.
- the obtained resin composition was subjected to hot press molding at 230 ° C. using a compression molding machine (NSF-37) manufactured by Shindo Metal Industry Co., Ltd., and a single layer having a thickness of 80 ⁇ m, a width of 1.5 cm, and a length of 5 cm. A film was produced.
- NSF-37 compression molding machine manufactured by Shindo Metal Industry Co., Ltd.
- the content of cinnamic acid (b1) was evaluated based on the following procedure using liquid chromatography mass spectrometry (LC / MS / MS).
- Cinnamic acid (b1) (10.89 mg) was weighed into a 10 mL volumetric flask and dissolved in methanol to give a 10 mL solution (standard stock solution; 1089 ⁇ g / mL). Subsequently, the prepared standard stock solution was diluted with methanol, and each mixed standard (0.109 ⁇ g / mL, 0.218 ⁇ g / mL, 0.545 ⁇ g / mL, 1.09 ⁇ g / mL, 2.18 ⁇ g / mL) was mixed. A solution was prepared. LC / MS / MS analysis was performed using these mixed standard solutions, and a calibration curve was prepared.
- the liquid obtained by filtering the sample solution (I) or the sample solution (II) with a PTFE filter (pore size 0.45 ⁇ m) was subjected to LC / MS / MS analysis as a measurement solution.
- the detected concentration of cinnamic acid (b1) was calculated from the peak area value detected by LC / MS / MS analysis and the calibration curve of the standard solution.
- the transmittance (%) at a wavelength of 280 nm was measured using a spectrophotometer “UV2600” manufactured by Shimadzu Corporation.
- the EVOH (A) single layer film was produced as a reference film in the same procedure as Comparative Example 1 described later, and the transmittance (%) was measured in the same manner.
- UV absorption increase rate (Z) was calculated using the following formula (1), and the ultraviolet absorption effect was evaluated according to the following evaluation criteria.
- UV absorption increase rate (Z) was calculated using the said Formula (1), and the alcohol resistance of the ultraviolet absorption effect was evaluated on the following evaluation criteria.
- UV absorption increase rate (Z) ⁇ 2 ⁇
- UV absorption increase rate (Z) ⁇ 2 ⁇
- ⁇ Odor sensory test (odor evaluation)> The monolayer film (5 g) was sealed in a stoppered flask and subjected to an odor sensory test using a sample left at 200 ° C. for 15 minutes in a nitrogen atmosphere as a sample.
- the odor sensory test was conducted by seven persons, and was scored based on the following evaluation criteria, and the average value of the seven persons was used as the odor evaluation result. The higher the value, the stronger the odor. In particular, an evaluation of 4 or more means a bad odor. 0: Odorless. 1: The smell that can finally be detected. 2: A weak odor that tells what odor is. 3: Smell that can be easily detected. 4: Strong odor (bad odor). 5: Strong odor (strong odor).
- Example 1 In Example 1, it carried out similarly except not mix
- Example 2 In Example 1, it carried out similarly except not mix
- Example 3 A resin composition and a single layer film were produced in the same manner as in Example 1 except that cinnamic acid (b1) was not blended. The obtained single layer film was evaluated in the same manner as in Example 1.
- the monolayer film of Example 1 containing cinnamic acid (b1) and sodium acetate (c1) with respect to EVOH (a1) is the same as that of Comparative Examples 1 to 3 that does not contain a part of them.
- the UV (280 nm) absorption effect is strong, and the alcohol resistance of the UV absorption effect is also strong, and the odor evaluation is less than 4, and the generation of odor at high temperature (such as during melt molding) is suppressed. I understand that.
- the resin composition of the present invention contains (C) at least one of EVOH (A), cinnamic acid (B), alkali metal salt (C1) and alkaline earth metal salt (C2).
- a melt-molded product for example, a film or the like
- a multilayer structure comprising the resin composition has a wavelength in a specific ultraviolet region (for example, UV-B, UV-less than 320 nm) while maintaining excellent transparency. It is an excellent film that absorbs C) and further suppresses the generation of odor. Therefore, it is useful as various packaging materials for food, particularly as a container for alcoholic beverages.
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Abstract
Description
すなわち、本発明は、EVOH(A)、桂皮酸類(B)、及びアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)(ただし、成分(C)は桂皮酸塩を除く)を含有する樹脂組成物を第1の要旨とする。
<1>下記成分(A)~(C)を含有する樹脂組成物。
エチレン-ビニルエステル系共重合体ケン化物(A)
桂皮酸類(B)
アルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)(ただし、成分(C)は桂皮酸塩を除く)
<2>前記桂皮酸類(B)の含有量が、前記エチレン-ビニルエステル系共重合体ケン化物(A)100重量部に対して0.0005~0.1重量部である<1>記載の樹脂組成物。
<3>前記アルカリ金属塩(C1)及び前記アルカリ土類金属塩(C2)の少なくとも一方(C)の含有量が、前記エチレン-ビニルエステル系共重合体ケン化物(A)100重量部に対して金属換算で0.001~0.1重量部である<1>または<2>記載の樹脂組成物。
<4>前記桂皮酸類(B)と前記アルカリ金属塩(C1)及び前記アルカリ土類金属塩(C2)の少なくとも一方(C)の重量比率(B/C)が、0.01~100である<1>~<3>のいずれか1つに記載の樹脂組成物。
<5><1>~<4>のいずれか1つに記載の樹脂組成物を溶融成形してなる溶融成形品。
<6><1>~<4>のいずれか1つに記載の樹脂組成物からなる樹脂組成物層を少なくとも1層有する多層構造体。
本発明で用いるEVOH(A)について説明する。
本発明で用いるEVOH(A)は、通常、エチレンとビニルエステル系モノマーを共重合させた後にケン化させることにより得られる樹脂であり、非水溶性の熱可塑性樹脂である。重合法も公知の任意の重合法、例えば、溶液重合、懸濁重合、エマルジョン重合を用いることができるが、一般的にはメタノールを溶媒とする溶液重合が用いられる。得られたエチレン-ビニルエステル系共重合体のケン化も公知の方法で行い得る。
すなわち、本発明で用いるEVOH(A)は、エチレン構造単位とビニルアルコール構造単位を主とし、場合によってはケン化されずに残存した若干量のビニルエステル構造単位を含むものである。
上記コモノマーは、例えば、プロピレン、1-ブテン、イソブテン等のオレフィン類や、2-プロペン-1-オール、3-ブテン-1-オール、4-ペンテン-1-オール、5-ヘキセン-1-オール、3,4-ジヒドロキシ-1-ブテン、5-ヘキセン-1,2-ジオール等のヒドロキシ基含有α-オレフィン類や、そのエステル化物である、3,4-ジアシロキシ-1-ブテン、特に、3,4-ジアセトキシ-1-ブテン等、2,3-ジアセトキシ-1-アリルオキシプロパン、2-アセトキシ-1-アリルオキシ-3-ヒドロキシプロパン、3-アセトキシ-1-アリルオキシ-2-ヒドロキシプロパン、グリセリンモノビニルエーテル、グリセリンモノイソプロペニルエーテル等、アシル化物等の誘導体、2-メチレンプロパン-1,3-ジオール、3-メチレンペンタン-1,5-ジオール等のヒドロキシアルキルビニリデン類、1,3-ジアセトキシ-2-メチレンプロパン、1,3-ジプロピオニルオキシ-2-メチレンプロパン、1,3-ジブチロニルオキシ-2-メチレンプロパン等のヒドロキシアルキルビニリデンジアセテート類、アクリル酸、メタクリル酸、クロトン酸、(無水)フタル酸、(無水)マレイン酸、(無水)イタコン酸等の不飽和酸類あるいはその塩あるいは炭素数1~18のモノまたはジアルキルエステル類、アクリルアミド、炭素数1~18のN-アルキルアクリルアミド、N,N-ジメチルアクリルアミド、2-アクリルアミドプロパンスルホン酸あるいはその塩、アクリルアミドプロピルジメチルアミンあるいはその酸塩あるいはその4級塩等のアクリルアミド類、メタアクリルアミド、炭素数1~18のN-アルキルメタクリルアミド、N,N-ジメチルメタクリルアミド、2-メタクリルアミドプロパンスルホン酸あるいはその塩、メタクリルアミドプロピルジメチルアミンあるいはその酸塩あるいはその4級塩等のメタクリルアミド類、N-ビニルピロリドン、N-ビニルホルムアミド、N-ビニルアセトアミド等のN-ビニルアミド類、アクリルニトリル、メタクリルニトリル等のシアン化ビニル類、炭素数1~18のアルキルビニルエーテル、ヒドロキシアルキルビニルエーテル、アルコキシアルキルビニルエーテル等のビニルエーテル類、塩化ビニル、塩化ビニリデン、フッ化ビニル、フッ化ビニリデン、臭化ビニル等のハロゲン化ビニル化合物類、トリメトキシビニルシラン等のビニルシラン類、酢酸アリル、塩化アリル等のハロゲン化アリル化合物類、アリルアルコール、ジメトキシアリルアルコール等のアリルアルコール類、トリメチル-(3-アクリルアミド-3-ジメチルプロピル)-アンモニウムクロリド、アクリルアミド-2-メチルプロパンスルホン酸等のコモノマーがあげられる。
本発明においては、EVOH(A)に対して桂皮酸類(B)が含有される。
桂皮酸としては、例えば、シス―桂皮酸、トランス―桂皮酸を挙げることができ、安定性および価格の観点から、好適にはトランス―桂皮酸が用いられる。
本発明における、樹脂組成物中の桂皮酸類(B)の含有量は、液体クロマトグラフィー質量分析法(LC/MS/MS)を用いて測定することができる。詳細には、例えば、下記の手順が挙げられる。なお、下記手順は桂皮酸類(B)として桂皮酸を用いた場合を例にして記載するが、桂皮酸以外の桂皮酸類(B)についても同様の手順にて行なわれる。
桂皮酸(10.89mg)を10mLメスフラスコに秤量し、メタノールに溶解して10mL溶液とする(標準原液;1089μg/mL)。ついで、調製した標準原液をメタノールで希釈して、複数濃度(0.109μg/mL、0.218μg/mL、0.545μg/mL、1.09μg/mL、2.18μg/mL)の各混合標準溶液を調製する。これら混合標準溶液を用いてLC/MS/MS分析を実施し、検量線を作成する。
(1)本発明の樹脂組成物(1g)を10mLメスフラスコに秤量後、メタノール9mLを加える。
(2)超音波処理を120分間実施後、室温(25℃)で放冷する。
(3)メタノールを加えて10mLに定容する(試料溶液(I))。
(4)試料溶液(I)1mLを10mLメスフラスコに採取後、メタノールを加えて10mLに定容する(試料溶液(II))。
(5)試料溶液(I)あるいは試料溶液(II)をポリテトラフルオロエチレン(PTFE)フィルタ(ポアサイズ0.45μm)で濾過した液体を測定溶液としてLC/MS/MS分析に供する。
(6)LC/MS/MS分析で検出されたピーク面積値と、標準溶液の検量線から桂皮酸の検出濃度を算出する。
LCシステム: LC-20A[島津製作所社製]
質量分析計: API4000[AB/MDS Sciex]
分析カラム: Scherzo SM-C18 (3.0×75mm、3μm)
カラム温度: 45℃
移動相: A 10mmol/L 酢酸アンモニウム水溶液
B メタノール
タイムプログラム: 0.0→5.0min B%=30%→95%
5.0→10.0min B%=95%
10.1→15.0min B%=30%
流量: 0.4mL/min
切り替えバルブ: 2.0to6.0min: to MS
注入量: 5μL
イオン化: ESI法
検出: 負イオン検出(SRM法)
モニターイオン: Q1=147.0→Q3=102.9(CE:-15eV)
本発明においては、EVOH(A)に対してアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)が含有される。
したがって、かかるアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)は、桂皮酸塩を形成可能な塩であればよい。
EVOH(A)中のアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)の含有量は、原子吸光度法により各金属を定量することにより算出することができる。原子吸光分析用の試料は、例えば、乾燥した樹脂組成物を精秤して、恒量化した白金蒸発皿に入れ、電熱器で炭化し、次いでガスバーナーで加熱し、煙が出なくなるまで焼き、更に電気炉内に前記の白金蒸発皿を入れ、昇温して、完全に灰化させて、冷却後、灰化物に塩酸及び純水を入れ、電熱器で加熱して溶解し、メスフラスコに流し込み、純水で容量を一定にして原子吸光分析用の試料として調製することができる。
本発明において使用される桂皮酸類(B)とアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)の重量比率(B/C)は、0.01~100であることが好ましく、より好ましくは0.1~50、さらに好ましくは0.5~10、特に好ましくは1~5である。かかる重量比率(B/C)が低すぎると、紫外線吸収効果が低下する傾向があり、高すぎると紫外線吸収効果の耐アルコール性効果が低下する傾向がある。
本発明の樹脂組成物は、樹脂成分として、EVOH(A)以外に、他の熱可塑性樹脂(D)を、EVOH(A)に対して、通常30重量%以下となるような範囲内で含有してもよい。
具体的には、例えば、ポリカプラミド(ナイロン6)、ポリ-ω-アミノヘプタン酸(ナイロン7)、ポリ-ω-アミノノナン酸(ナイロン9)、ポリウンデカンアミド(ナイロン11)、ポリラウリルラクタム(ナイロン12)等のホモポリマーがあげられる。
100×Y/(X+Y)≧5
を満足する末端変性ポリアミド系樹脂が好ましく用いられる。
本発明の樹脂組成物には、ガスバリア性を向上させる目的で、EVOH(A)(所望により、さらに他の熱可塑性樹脂(D))、桂皮酸類(B)、アルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)の他、さらに無機フィラー(E)を含有してもよい。
本発明の樹脂組成物には、熱水処理(レトルト処理)後のガスバリア性を改善する目的で、EVOH(A)、桂皮酸類(B)、アルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)の他、さらに酸素吸収剤(F)を含有してもよい。
上記金属としては、通常、水素よりもイオン化傾向の大きい金属(Fe、Zn、Al、Ni、Sn等)が用いられ、代表的には鉄である。これらの金属は、粉末状で用いられることが好ましい。鉄粉としては、還元鉄粉、アトマイズ鉄粉、電解鉄粉等、その製法等によらず、従来公知のものを特に限定されることなく何れも使用可能である。また、使用する鉄は、一旦酸化された鉄を還元処理したものであってもよい。
このような金属および金属化合物は、反応促進剤としてハロゲン化金属等を含有することも好ましい。
本発明の樹脂組成物には、上記各成分のほか、必要に応じて、本発明の効果を損なわない範囲内にて(例えば、樹脂組成物全体の5重量%以下にて)、エチレングリコール、グリセリン、ヘキサンジオール等の脂肪族多価アルコール等の可塑剤;高級脂肪酸(例えばラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、ベヘニン酸、オレイン酸等)、高級脂肪酸エステル(高級脂肪酸のメチルエステル、イソプロピルエステル、ブチルエステル、オクチルエステル等)、高級脂肪酸アミド(ステアリン酸アミド、ベヘニン酸アミド等の飽和脂肪族アミド、オレイン酸アミド、エルカ酸アミド等の不飽和脂肪酸アミド、エチレンビスステアリン酸アミド、エチレンビスオレイン酸アミド、エチレンビスエルカ酸アミド、エチレンビスラウリン酸アミド等のビス脂肪酸アミド)、低分子量ポリオレフィン(例えば分子量500~10000程度の低分子量ポリエチレン、又は低分子量ポリプロピレン)、;フッ化エチレン樹脂等の滑剤;アンチブロッキング剤;酸化防止剤;着色剤;帯電防止剤;抗菌剤;不溶性無機塩(例えば、ハイドロタルサイト等);界面活性剤;共役ポリエン化合物等の公知の添加剤を適宜配合することができる。
本発明の樹脂組成物は、例えば、1)含水率20~80重量%のEVOH(A)の多孔性析出物を、桂皮酸類(B)とアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)を含有する水分散液と接触させて、EVOH(A)に桂皮酸類(B)とアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)を含有させてから乾燥する方法、2)EVOH(A)の均一溶液(水/アルコール溶液等)に桂皮酸類(B)とアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)を含有させた後、凝固液中にストランド状に押し出し、次いで得られたストランドを切断してペレットとして、さらに乾燥処理をする方法、3)EVOH(A)と桂皮酸類(B)とアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)を一括してドライブレンドする方法、4)EVOH(A)と桂皮酸類(B)とアルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)を一括してドライブレンドしてから押出機等で溶融混練する方法、5)EVOH(A)の製造時において、ケン化工程で使用したアルカリ(水酸化ナトリウム、水酸化カリウム等)を酢酸等の酸類で中和して、残存する酢酸等の酸類や副生成する酢酸ナトリウム、酢酸カリウム等のアルカリ金属塩(C1)の量を水洗処理により調整し、得られたアルカリ金属塩(C1)含有EVOH(A)に桂皮酸類(B)及び所望によりアルカリ土類金属塩(C2)をドライブレンドしてから押出機等で溶融混練する方法などを挙げることができる。
本発明の溶融成形品は、本発明の樹脂組成物を溶融成形してなるものである。本発明の樹脂組成物は、溶融成形法により、例えばフィルム、さらにはカップやボトル等に成形することができる。上記溶融成形方法としては、押出成形法(T-ダイ押出、インフレーション押出、ブロー成形、溶融紡糸、異型押出等)、射出成形法等があげられる。溶融成形温度は、通常150~300℃の範囲から適宜選択される。
なお、本発明において、「フィルム」とは、特に「シート」、「テープ」と区別するものではなく、これらも含めた意味として記載するものである。
本発明の多層構造体は、上記本発明の樹脂組成物からなる層を少なくとも1層有するものである。本発明の樹脂組成物からなる層(以下、単に「樹脂組成物層」というと、本発明の樹脂組成物からなる層をいう。)は、他の基材と積層することで、さらに強度を上げたり、他の機能を付与したりすることができる。
本発明の多層構造体の層数は、のべ数にて通常2~15層、好ましくは3~10層である。
なお、上記層構成において、それぞれの層間には、必要に応じて接着性樹脂層を介層してもよい。
代表的には、不飽和カルボン酸またはその無水物をポリオレフィン系樹脂に付加反応やグラフト反応等により化学的に結合させて得られるカルボキシル基を含有する変性ポリオレフィン系重合体をあげることができる。
例えば、本発明の樹脂組成物のフィルム、シート等に他の基材を溶融押出ラミネートする方法、逆に他の基材に本発明の樹脂組成物を溶融押出ラミネートする方法、本発明の樹脂組成物と他の基材とを共押出する方法、本発明の樹脂組成物からなるフィルム(層)および他の基材(層)を各々作製し、これらを有機チタン化合物、イソシアネート化合物、ポリエステル系化合物、ポリウレタン化合物等の公知の接着剤を用いてドライラミネートする方法、他の基材上に本発明の樹脂組成物の溶液を塗工してから溶媒を除去する方法等があげられる。これらの中でも、コストや環境の観点から考慮して共押出する方法が好ましい。
<樹脂組成物及び単層フィルムの製造>
EVOH(A)として、EVOH(a1)〔エチレン構造単位の含有量29モル%、ケン化度99.6モル%、MFR8.8g/10分(210℃、荷重2160g)〕を用いた。ペレット状のEVOH(a1)を、酢酸ナトリウム(c1)を含有する水溶液に浸漬したあと乾燥し、最終的に樹脂組成物ペレットの含水率が樹脂組成物に対して0.2重量%、酢酸ナトリウム(c1)をナトリウム換算で110ppm含有したアルカリ金属塩含有EVOH樹脂を得た。すなわち、かかる樹脂は、EVOH(a1)100部に対して酢酸ナトリウム(c1)をナトリウム換算で0.011部含有する。
桂皮酸(b1)(10.89mg)を10mLメスフラスコに秤量し、メタノールに溶解して10mL溶液とした(標準原液;1089μg/mL)。ついで、調製した標準原液をメタノールで希釈して、複数濃度(0.109μg/mL、0.218μg/mL、0.545μg/mL、1.09μg/mL、2.18μg/mL)の各混合標準溶液を調製した。これら混合標準溶液を用いてLC/MS/MS分析を実施し、検量線を作成した。
(1)上記得られた樹脂組成物(1g)を10mLメスフラスコに秤量後、メタノール9mLを加えた。
(2)超音波処理を120分間実施後、室温(25℃)で放冷した。
(3)メタノールを加えて10mLに定容した(試料溶液(I))。
(4)試料溶液(I)1mLを10mLメスフラスコに採取後、メタノールを加えて10mLに定容した(試料溶液(II))。
(5)試料溶液(I)あるいは試料溶液(II)をPTFEフィルタ(ポアサイズ0.45μm)で濾過した液体を測定溶液としてLC/MS/MS分析に供した。
(6)LC/MS/MS分析で検出されたピーク面積値と、標準溶液の検量線から桂皮酸(b1)の検出濃度を算出した。
LCシステム: LC-20A[島津製作所社製]
質量分析計: API4000[AB/MDS Sciex]
分析カラム: Scherzo SM-C18(3.0×75mm、3μm)
カラム温度: 45℃
移動相: A 10mmol/L 酢酸アンモニウム水溶液
B メタノール
タイムプログラム: 0.0→5.0min B%=30%→95%
5.0→10.0min B%=95%
10.1→15.0min B%=30%
流量: 0.4mL/min
切り替えバルブ: 2.0to6.0min: to MS
注入量: 5μL
イオン化: ESI法
検出: 負イオン検出(SRM法)
モニターイオン: Q1=147.0→Q3=102.9(CE:-15eV)
上記単層フィルムを用い、島津製作所社製の分光光度計「UV2600」を使用して、波長280nm(紫外線領域)の透過率(%)を測定した。また、基準フィルムとしてEVOH(A)単層フィルムを後述の比較例1と同様の手順で作製し、同様に透過率(%)を測定した。
紫外線吸収増加率(Z)≧2:○
紫外線吸収増加率(Z)<2:×
上記単層フィルムおよび基準フィルムを、山善製薬社製のエタノール(純度95.1~96.9%)を50ml入れた密閉フラスコ中に入れ3日間室温で撹拌した。その後、単層フィルムおよび基準フィルムを、島津製作所社製の分光光度計「UV2600」を使用して、波長280nm(紫外線領域)の透過率(%)を測定した。
紫外線吸収増加率(Z)≧2:○
紫外線吸収増加率(Z)<2:×
上記単層フィルム5gを栓付フラスコ中に密閉し、窒素雰囲気下、200℃で15分間放置したものを試料として臭気官能試験に供した。なお、臭気官能試験は、7人で行い、下記評価基準に基づき採点し、7人の平均値を臭気評価結果とした。数値が高いほど臭気が強いことを意味し、特に評価4以上は悪臭を意味する。
0:無臭。
1:やっと感知できる臭い。
2:何の匂いか分かる弱い臭い。
3:楽に感知できる臭い。
4:強い臭い(悪臭)。
5:強烈な臭い(強烈な悪臭)。
実施例1において、桂皮酸(b1)及び酢酸ナトリウム(c1)を配合しない以外は同様に行い、樹脂組成物および単層フィルムを作製した。得られた単層フィルムについて、実施例1と同様に評価した。
実施例1において、酢酸ナトリウム(c1)を配合しない以外は同様に行い、樹脂組成物および単層フィルムを作製した。得られた単層フィルムについて、実施例1と同様に評価した。
実施例1において、桂皮酸(b1)を配合しない以外は同様に行い、樹脂組成物および単層フィルムを作製した。得られた単層フィルムについて、実施例1と同様に評価した。
Claims (6)
- 下記成分(A)~(C)を含有する樹脂組成物。
エチレン-ビニルエステル系共重合体ケン化物(A)
桂皮酸類(B)
アルカリ金属塩(C1)及びアルカリ土類金属塩(C2)の少なくとも一方(C)(ただし、成分(C)は桂皮酸塩を除く) - 前記桂皮酸類(B)の含有量が、前記エチレン-ビニルエステル系共重合体ケン化物(A)100重量部に対して0.0005~0.1重量部である請求項1記載の樹脂組成物。
- 前記アルカリ金属塩(C1)及び前記アルカリ土類金属塩(C2)の少なくとも一方(C)の含有量が、前記エチレン-ビニルエステル系共重合体ケン化物(A)100重量部に対して金属換算で0.001~0.1重量部である請求項1または2記載の樹脂組成物。
- 前記桂皮酸類(B)と前記アルカリ金属塩(C1)及び前記アルカリ土類金属塩(C2)の少なくとも一方(C)の重量比率(B/C)が、0.01~100である請求項1~3のいずれか1項に記載の樹脂組成物。
- 請求項1~4のいずれか1項に記載の樹脂組成物を溶融成形してなる溶融成形品。
- 請求項1~4のいずれか1項に記載の樹脂組成物からなる樹脂組成物層を少なくとも1層有する多層構造体。
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CN201680073497.7A CN108473742B (zh) | 2015-12-16 | 2016-12-13 | 树脂组合物及使用其的熔融成型品、以及多层结构体 |
SG11201804990WA SG11201804990WA (en) | 2015-12-16 | 2016-12-13 | Resin composition, melt-molded article using same, and multilayered structure |
JP2016574202A JP6812799B2 (ja) | 2015-12-16 | 2016-12-13 | 樹脂組成物およびそれを用いた溶融成形品、ならびに多層構造体 |
EP16875650.0A EP3392305A4 (en) | 2015-12-16 | 2016-12-13 | RESIN COMPOSITION, MOLDED MOLDED ARTICLE USING SAME, AND MULTILAYER STRUCTURE |
US16/062,337 US10961370B2 (en) | 2015-12-16 | 2016-12-13 | Resin composition, melt-molded article using same, and multilayered structure |
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WO2019004262A1 (ja) * | 2017-06-27 | 2019-01-03 | 日本合成化学工業株式会社 | エチレン-ビニルアルコール系共重合体組成物、ペレットおよび多層構造体 |
JP2020105317A (ja) * | 2018-12-27 | 2020-07-09 | 株式会社クラレ | 樹脂組成物、成形体及び多層構造体 |
TWI838339B (zh) | 2017-06-27 | 2024-04-11 | 日商三菱化學股份有限公司 | 乙烯-乙烯醇系共聚物組成物、丸粒及多層結構體 |
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EP3392305A4 (en) | 2019-07-31 |
US10961370B2 (en) | 2021-03-30 |
TW201726753A (zh) | 2017-08-01 |
CN108473742A (zh) | 2018-08-31 |
JPWO2017104673A1 (ja) | 2018-10-04 |
SG11201804990WA (en) | 2018-07-30 |
EP3392305A1 (en) | 2018-10-24 |
TWI715693B (zh) | 2021-01-11 |
US20180362728A1 (en) | 2018-12-20 |
JP6812799B2 (ja) | 2021-01-13 |
CN108473742B (zh) | 2021-11-12 |
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