WO2005035223A1 - 多層構造体の製造方法 - Google Patents
多層構造体の製造方法 Download PDFInfo
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- WO2005035223A1 WO2005035223A1 PCT/JP2004/015071 JP2004015071W WO2005035223A1 WO 2005035223 A1 WO2005035223 A1 WO 2005035223A1 JP 2004015071 W JP2004015071 W JP 2004015071W WO 2005035223 A1 WO2005035223 A1 WO 2005035223A1
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- evoh
- melt
- resin
- multilayer structure
- molding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/185—Articles comprising two or more components, e.g. co-extruded layers the components being layers comprising six or more components, i.e. each component being counted once for each time it is present, e.g. in a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/269—Extrusion in non-steady condition, e.g. start-up or shut-down
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/9298—Start-up, shut-down or parameter setting phase; Emergency shut-down; Material change; Test or laboratory equipment or studies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/17—Articles comprising two or more components, e.g. co-extruded layers the components having different colours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
- B29K2995/0067—Permeability to gases non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7172—Fuel tanks, jerry cans
Definitions
- the present invention relates to a method for producing a multilayer structure (laminate) composed of an ethylene butyl acetate copolymer keride (hereinafter abbreviated as EVOH) in extrusion molding, and more particularly to a purging agent.
- EVOH ethylene butyl acetate copolymer keride
- the present invention relates to a method for producing a multilayered structure capable of obtaining a good molded product immediately after re-starting without using the same.
- EVOH is excellent in gas noria and solvent noria, and is therefore used by being molded into packaging films and containers for foods and the like, gasoline tanks and the like.
- melt molding is performed using EVOH, and the operation of the molding machine (melt extruder) is stopped for a long time (especially 4 hours or more) and then restarted.
- purging is incomplete, it is necessary to perform a long-term discharge operation (purge) in order to remove the EVOH gel and decomposition products etc. existing in the resin flow path of the molding machine.
- purge a long-term discharge operation
- streaks are formed in the molded product (product), and gels and bubbles are mixed in, resulting in enormous time and product loss to obtain a good product.
- the high-density polyethylene (HDPE) and the low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), polystyrene (PS), polypropylene (PP), etc. as a purging agent (purging resin) to purge the resin resin flow path of the molding machine.
- EVOH is added to polyamide Z polyether copolymer, polyester Z polyether copolymer, polyamide Z polyester Z polyether copolymer.
- a purging agent obtained by blending a copolymer such as a polymer see, for example, JP-A-1-178545
- a purging agent obtained by mixing a group 2 metal salt with polyolefin or a blend of polyolefin and EVOH for example, see JP-A- 5-2 79518
- a purging agent composed of a resin such as EVOH which satisfies a specific melt viscosity index (melt index) (for example, see JP-A-5-269754), and a hydrophobic thermoplastic resin.
- Purging agents such as a purging agent (for example, see Japanese Patent Application Laid-Open No. 9-277340) comprising a fat and a hydrophilic thermoplastic resin and a plasticizer of the resin to be purged have been proposed. I have.
- the purging agent disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 1-178545 has poor stability of the purging agent itself because it uses EVOH and a polyamide-based elastomer.
- the purging agent disclosed in Japanese Patent Application Laid-Open No. 5-279518 may cause foreign matters, and the present inventor has examined the purging agent in detail, and found that the purging agent was slightly contained in the extruder (metal surface) after purging. Residue was observed, which could lead to the generation of foreign matter as described above. Further, the purging agent disclosed in Japanese Patent Application Laid-Open No.
- 5-269754 has a low viscosity upon heating (it becomes very low after heating for 300 minutes), which may cause an unpleasant odor and may cause the product to smell, which is not preferable.
- the purging agent disclosed in Japanese Patent Application Laid-Open No. 9-277340 has a problem that the plasticizer volatilizes and may contaminate the processing machine.
- a purging agent that can overcome these drawbacks is desired.In all cases, the use of purging agent requires more than switching to EVOH purging agent and re-melting of EVOH. Switching to EVOH is indispensable, complicating the operation and causing a considerable loss of EVOH.In addition, it is actually formed as a multilayer sheet etc. in combination with not only EVOH but also other resins.
- the melt molding process is further stopped, and the force of the ethylene acetate butyl copolymer flowing out of the die slip portion between the start of the melt molding process and the other resin is reduced.
- the volume must be 2 to 30% by volume of the volume of the die, the EVOH composition contains 0.001 to 0.5% by weight of boron compound in terms of boron, and the melt viscosity ratio of EVOH is 0.5. —10 is a preferred embodiment.
- the melt viscosity ratio is defined as the ratio of the melt viscosity (V4) when EVOH is left under oxygen-free condition at 190 ° C for 4 hours to the melt viscosity (V24) when it is left for 24 hours (V24 / V4).
- an ethylene content of 10 70 mole 0/0 (further ⁇ This 20- 60 mole 0/0, especially 25- 50 mole 0/0)
- the butyl acetate component having a saponification degree of 90 mol% or more (more preferably 95 mol% or more, particularly 99 mol% or more) is preferably used, and if the ethylene content is less than 10 mol%, a molded product is obtained.
- the barrier properties at high humidity and the melt moldability are reduced.
- it exceeds 70 mol% noria may be imparted to the molded product.
- the vinyl acetate component has a degree of kneading of less than 90 mol%, the barrier properties, thermal stability, moisture resistance, etc. of the molded product are undesirably reduced.
- the melt flow rate (MFR) of EVOH (measured at 210 ° C. under a load of 2160 g; the same applies hereinafter) is not particularly limited, but is not limited to 0.5—100 gZlO (particularly, 50 gZlO, especially If the melt flow rate is less than the above range, the extruder tends to be in a high torque state during molding, making extrusion difficult. If it is larger than this, the moldability decreases, and when a multilayer structure (laminate) is formed, the thickness accuracy of the EVOH-containing layer in the laminate decreases, which is not preferable.
- EVOH having a melt viscosity ratio of 0.5 to 10 (further 0.7 to 8).
- melt viscosity ratio is less than 0.5, it is preferable to use an EVOH in the molding machine. If EVOH is left unattended, burning, discoloration, or decomposition gas may be generated.On the other hand, if it exceeds 10, re-startup (restarting of molding) may cause streaks on molded products for a long time. There is no good.
- the melt viscosity ratio referred to here is the ratio of the melt viscosity when left at 190 ° C for 4 hours and 24 hours (melt viscosity after 24 hours Z melt viscosity after 4 hours).
- the EVOH is obtained by saponification of an ethylene-butyl acetate copolymer, and the ethylene-vinyl acetate copolymer can be produced by any known polymerization method, for example, solution polymerization, suspension polymerization, emulsion polymerization and the like.
- the saponification of an ethylene butyl acetate copolymer can also be carried out by a known method.
- a monomer that can be copolymerized with an ethylenically unsaturated monomer copolymerizable within a range that does not impair the effects of the present invention includes propylene.
- Unsaturated acids such as olefins such as butene, 1-butene, isobutene, acrylic acid, methacrylic acid, crotonic acid, (phthalic anhydride), maleic anhydride (anhydride), and itaconic acid;
- the ethylene content is 5 mol% or more (further, 5 to 25 mol%, particularly 8 to 20 mol%).
- Z or the degree of saponification is 1 mol% or more (even 1 to 15 mol%, especially 2 to 10 mol%), and the ratio of Z or MFR is 2 or more (more preferably 3 to 20, especially It is useful to use a blend of EVOH, which is 4-15), since the flexibility, thermoformability, film forming stability, etc. are further improved while maintaining the gas nori properties.
- the method for producing two or more different types of EVOH (blend) is not particularly limited.
- a method of mixing each paste of ethylene acetic acid butyl copolymer before saponification, and then quenching, or a method for preparing alcohol or alcohol of each EVOH after saponification examples include a method of mixing a mixed solution of water and an alcohol, and a method of mixing and kneading each EVOH after mixing.
- the EVOH used in the present invention may contain acids such as acetic acid and phosphoric acid and metal salts thereof such as alkali metals, alkali earth metals, and transition metals.
- acids such as acetic acid and phosphoric acid and metal salts thereof such as alkali metals, alkali earth metals, and transition metals.
- alkali (earth) metal salts are preferred in that they improve the formability of the adhesive, the adhesiveness between the adhesive and the resin when the multilayer film is formed using the adhesive, and the heat-stretchable formability. It is preferably used because of its excellent effect.
- the EVOH used in the present invention contains a boron compound.
- a boron compound is preferably contained in EVOH in an amount of 10 to 5000 ppm (more preferably 20 to 300 Oppm) in terms of boron. If the strong content is less than 10 ppm, the amount of EVOH to be purged at the time of restarting tends to increase, and if it exceeds 5000 ppm, the appearance of the obtained molded article tends to deteriorate, which is not preferable.
- Examples of the powerful boron compound include boric acid or a metal salt thereof, for example, calcium borate, cobalt borate, zinc borate (such as zinc tetraborate and zinc metaborate), potassium aluminum borate, and ammonium borate.
- boric acid or a metal salt thereof for example, calcium borate, cobalt borate, zinc borate (such as zinc tetraborate and zinc metaborate), potassium aluminum borate, and ammonium borate.
- cadmium borate cadmium orthoborate, cadmium tetraborate, etc.
- potassium borate potassium borate (potassium metaborate)
- silver borate silver metaborate, silver tetraborate, etc.
- alkali (earth) metal salts examples include organic acids such as acetic acid, propionic acid, butyric acid, lauric acid, stearic acid, oleic acid, and benamic acid such as sodium, potassium, calcium, and magnesium.
- Acids and metal salts of inorganic acids such as sulfuric acid, sulfurous acid, carbonic acid and phosphoric acid. Preferred are acetates, phosphates and hydrogen phosphates.
- the content of such a metal salt is preferably 5 to 100 ppm (more preferably 10 to 500 ppm, particularly 20 to 300 ppm) in terms of metal with respect to EVOH.
- the content exceeds 100 ppm, the appearance of the multilayer film obtained when the multilayer film or the like is formed may be unfavorably deteriorated.
- the total content is preferably within the above range.
- the method for incorporating the above-mentioned acids, their metal salts, or boron compounds into EVOH is not particularly limited, and a) the porous precipitate of EVOH having a water content of 20 to 80% by weight may be used as an acid or A method in which the metal salt or boron compound is brought into contact with an aqueous solution to be contained therein and force-dried.
- a homogeneous EVOH solution water / alcohol solution, etc.
- a saturated aliphatic amide eg, stearic acid amide, etc.
- an unsaturated fatty acid amide eg, oleic acid, etc.
- Lubricants such as amides), bisfatty acid amides (eg, ethylene bisstearic acid amide), low molecular weight polyolefins (eg, low molecular weight polyethylene having a molecular weight of about 500 to 10,000, or low molecular weight polypropylene, etc.), and inorganic salts (eg, Talcite, etc.), plasticizers (eg, aliphatic polyhydric alcohols such as ethylene glycol, glycerin, hexanediol, etc.), oxygen absorbers [eg, reduced iron powders as inorganic oxygen absorbers, and water absorbing materials And aluminum electrolyte Pum powder, potassium sulfite, titanium oxide photocatalyst, etc.
- plasticizers eg, aliphatic polyhydric alcohols such as ethylene glycol, glycerin, hexanediol, etc.
- oxygen absorbers eg, reduced iron powders as inorganic oxygen absorbers, and water
- Coordination conjugates of transition metals with nitrogen-containing compounds such as bis-salicylaldehyde doimine cobalt, tetraethylene pentamine cobalt, cobalt Schiff base complexes, porphyrins, macrocyclic polyamine complexes, polyethyleneimine-cobalt complexes, terpenes Conjugates, reactants of amino acids and hydroxyl group-containing reducing substances, triphenylmethyl conjugates, etc.Coordination conjugates of nitrogen-containing resins and transition metals (e.g., meta- A combination of xylene diamine and cobalt), a tertiary hydrogen-containing resin and a transition metal Lend products (for example, a combination of a propylene oligomer and cobalt), a
- Inhibitors ultraviolet absorbers, coloring agents, antistatic agents, surfactants, antibacterial agents, antiblocking agents (such as talc fine particles), slip agents (such as amorphous silica), fillers (such as inorganic fillers) May be blended.
- the melt-molded calo- when the above-described EVOH (composition) is used together with another resin and supplied to a melt-forming machine having a die to form a multilayer structure, the melt-molded calo-
- the main feature is that the EVOH staying in the melt forming machine is left at a temperature 0 to 100 ° C lower than the processing temperature during melt forming until the melt forming process is started again after performing The forming process will be described below.
- the molding machine used in the present invention is not particularly limited, and a melt extruder equipped with a die is used. Can be used, and T dies, round dies, blow molding dies and the like can be used.
- the processing temperature of the EVOH is 200 to 270 ° C (further, 210 to 250 ° C, especially 220 to 240 ° C). And the thickness of the layer may be non-uniform, and conversely if it exceeds 270 ° C It is not preferable because color may be generated.
- multilayer melt molding of EVOH is performed by a conventionally known method, employing the above conditions.
- LZD 20-40
- CR (compression ratio of screw) 1.5-6.0
- 30-200mm ⁇ multi-layer downward round tip at the tip of multiple single screw extruders with 15-120mm ⁇ screws Using a blow bottle molding machine equipped with a die, at least one extruder is supplied with EVOH, and other extruders are supplied with a resin (thermoplastic resin) other than EVOH.
- the temperature of the die is set to 190-280 ° C, and a multi-layer bottle can be formed at a screw rotation speed of 10-1000 rpm with a discharge rate of 0.5-500 kgZhr.
- the set temperature of the molding machine at this time is set to a temperature lower by 0 to 100 ° C (further 0 to 80 ° C, particularly 0 to 50 ° C) than the processing temperature at the time of melt molding, Leave it for more than 4 hours (or even 4-100 hours, especially 8-80 hours). If the temperature of the EVOH is higher than the heating temperature at this time, the accumulated EVOH will burn or decompose gas, and the resin will be colored, which will require a large amount of time for purging.
- the standing temperature for resins other than EVOH is not particularly limited.
- the outflow amount of EVOH in the die is kept to a certain amount or less during the above-mentioned leaving period (usually 4 hours or more, further 5 to 100 hours, particularly 10 to 60 hours). This is preferable because the restarting time can be reduced.
- the amount of outflow of EVOH out of the dice during standing is 2-30% (or 5-25%, especially 10-20%) of the EVOH capacity in the die. It is. If the spill rate exceeds 30%, it may cause burns in the dies, which may cause streaks to occur at the time of re-starting. Because of this, a large amount of time is required for force purging, which is not preferable.
- the method of maintaining the strong outflow there is no particular limitation on the method of maintaining the strong outflow, but the change in the melt viscosity of each resin at each temperature is grasped, and the standing temperature is set to 0 to 100 ° from the processing temperature. It may be performed by a method of adjusting the temperature at a low temperature, or by directly applying a plate for preventing outflow to the lip portion of the die only when left unattended.
- the present invention is useful in molding a multilayer structure including an EVOH layer.
- Other resins (thermoplastic resins) used for layers other than the EVOH layer include linear low-density polyethylene and low-temperature resin.
- Polyolefin resins polyesters, polyamides, copolymerized polyamides, poly Vinyl chloride, polyvinyl chloride, acrylic resin, polystyrene, butyl ester resin, polyester elastomer, polyurethane elastomer, chlorinated polyethylene, chlorinated polypropylene, aromatic or aliphatic polyketone, and the like.
- Examples include polyalcohols obtained by reduction, and other EVs, etc., but from the viewpoint of practicality such as physical properties (particularly strength) of the laminate, polypropylene, polyamide, polyethylene, ethylene-vinyl acetate copolymer , Polystyrene, polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are preferably used.
- the thermoplastic resin layer is used as both outermost layers, and when the EVOH (including) layer is a and the thermoplastic resin layer is b, bZaZb, b / R / a / R, b / R / a / R / b, b / R / a / R / b, where R is the regrind layer that is a mixture of EVOH and thermoplastic resin / a / b, h / RZaZRZaZRZb, etc.It is also possible to employ a layer structure of bZaZb and bZRZaZb, and to use b for these layer structures as needed for the regrind layer.
- an adhesive resin for example, a carboxylic acid-modified polymer
- Liolefin resin is used.
- the production method of the present invention is particularly useful when molding a container.
- a container having the above-mentioned thermoplastic resin layer, EVOH layer, and thermoplastic resin layer structure If the method of the present invention is carried out by supplying the EVOH and the thermoplastic resin to an injection molding machine, a direct blow molding machine, an injection blow molding machine, or the like, a direct blow molding method is preferably employed.
- the container obtained by intensive use is for transporting, storing and storing volatile fuel-based compounds mainly composed of hydrocarbons such as agrochemicals, reagents, and kerosene, including fuel tanks for automobile gasoline and the like. It is useful as various containers such as bottles, tanks and drums.
- EVOH ethylene content 32 mole 0/0, Keni ⁇ 99.5 mole 0/0, MFR12gZlO component (21 0 ° C, load 2160 g), 180 ppm boron compound 380ppm contained in terms of boron, magnesium acetate over magnesium terms Content, melt viscosity ratio 6]
- HDPE high-density polyethylene, “Novatec HD HB431” manufactured by Nippon Polychem Co., Ltd.
- adhesive resin maleic anhydride-modified high-density polyethylene, “Modick” manufactured by Mitsubishi Iridaku Co., Ltd.
- the extruder for each layer was a single-screw extruder with a diameter of 30 mm, equipped with a downward round die of 21 mm ⁇ , and the resin volume in the die was 140 cm 3 .
- the thing was used.
- the ratio of the recovered resin to the HDPE of virgin was adjusted so that the EVOH content in the recovery layer was 1%.
- the set temperature of the processing machine for each layer was set to 210 ° C, and the die temperature was also set to 210 ° C.
- the molding was left at the set temperature for 8 hours.
- the resin flowing out of the die at this time was 10% of the die volume.
- the total amount of resin used for the 17-minute purge was 3,300 g.
- Example 1 was repeated except that the storage temperature was 150 ° C and the flow rate of the resin was 4%. After 11 minutes, the streak disappeared, and a bottle with good appearance was obtained.
- the total amount of resin used for the 13-minute purge was 3000 g.
- Example 1 Magnesium in Example 1, an ethylene content of 32 mole 0/0, Keni ⁇ 99.5 mole 0/0, MFR12g Zlo min (210 ° C, load 2160 g), 380 ppm boron compound in terms of boron, magnesium acetate Using EVOH with 250 ppm conversion and melt viscosity ratio of 4 When the resin was restarted in the same manner except that the flow rate of the resin was set to 35%, the bottle shape could be formed 4 minutes after the start of the flow of the resin, and the streaks were formed 21 minutes later. Disappeared, and a bottle with good appearance was obtained.
- Example 3 after stopping, a plate was applied to the lip portion of the die to suppress resin outflow.
- the outflow of resin at this time was 12%.
- a bottle shape could be formed two minutes after the resin was started to flow, and after 15 minutes, the streak disappeared to obtain a bottle having good appearance.
- the total amount of resin used for the 17-minute purge was 3,700 g.
- Example 1 was repeated in the same manner as in Example 1 except that the processing temperature was 230 ° C and the processing temperature was left as it was, and the outflow was 15%. After a minute, the bottle could be shaped, and after 15 minutes, the streak disappeared and a bottle with good appearance could be obtained.
- the total amount of resin used for the purging for 18 minutes was 4000 g.
- Example 1 was repeated except that the leaving time was 5 hours and the outflow amount was 7%, and when the resin was restarted, a bottle shape could be formed 2 minutes after the resin was started to flow. After 10 minutes, the streak disappeared and a bottle with good appearance was obtained.
- the total amount of resin used for the 12-minute purge was 2600 g.
- Example 1 an ethylene content of 32 mole 0/0, Keni ⁇ 99.5 mole 0/0, MFR12g / 10 minutes (210 ° C, load 2160g), using EVOH with a melt viscosity ratio of 2, containing 180 ppm of magnesium acetate in terms of magnesium, and using the same procedure except that the outflow was 35%, and restarted. 5 minutes after the resin began to flow, the shape of the bottle became possible, and after 20 minutes, the streak disappeared and a bottle with good appearance was obtained.
- the total amount of resin used for this 25-minute purge was 5,500 g.
- Example 1 before stopping, the extruder for the EVOH layer was purged with commercially available polyethylene (“NOBATEK LD LF542H” manufactured by Nippon Polychem Co., Ltd.), and then the temperature of the processing machine was lowered to room temperature. After adding EVOH and re-starting, it took 20 minutes from the start of resin flow of all layers to be able to mold the bottle shape, and furthermore, the streak disappeared and the bottle had good appearance. It took me 50 minutes to get it.
- NOBATEK LD LF542H commercially available polyethylene
- the total amount of resin used for purging during this time was 16000g.
- Example 1 the procedure was the same except that the die temperature at the time of standing after the molding was stopped was set to 230 ° C, and the product was started up again. It took 7 minutes to be able to do this, and it took 35 minutes before the streak disappeared and a bottle with good appearance was obtained.
- the total amount of resin used for the purge for 42 minutes was 9,500 g.
- Example 1 the same procedure was followed except that the die temperature at the time of standing after the molding was stopped was changed to 80 ° C, and when the resin was restarted, bottle-shaped molding was started after the resin flow started. It took 10 minutes to be possible, and 30 minutes before the streak disappeared and a good-looking bottle was obtained.
- the total resin amount used for purging during this period was 9,000 g.
- Table 1 shows the evaluation results of the bottles of the examples and the comparative examples.
- the method for producing a multilayer structure of the present invention is useful for various moldings, particularly effective for blow molding, and is a useful production method for molding fuel containers such as gasoline tanks.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Laminated Bodies (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Fats And Perfumes (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US10/576,073 US20070029689A1 (en) | 2003-10-14 | 2004-10-13 | Process for Preparing Multilayer Structure Product |
EP04792312A EP1674237B1 (en) | 2003-10-14 | 2004-10-13 | Process for producing multilayer structure |
AT04792312T ATE528121T1 (de) | 2003-10-14 | 2004-10-13 | Verfahren zur herstellung einer mehrlagigen struktur |
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JP2003353790A JP4527957B2 (ja) | 2003-10-14 | 2003-10-14 | 成形加工方法 |
JP2003-353790 | 2003-10-14 |
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PCT/JP2004/015071 WO2005035223A1 (ja) | 2003-10-14 | 2004-10-13 | 多層構造体の製造方法 |
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US (1) | US20070029689A1 (ja) |
EP (1) | EP1674237B1 (ja) |
JP (1) | JP4527957B2 (ja) |
CN (1) | CN100537189C (ja) |
AT (1) | ATE528121T1 (ja) |
WO (1) | WO2005035223A1 (ja) |
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CN109415133B (zh) * | 2016-06-30 | 2019-09-17 | 株式会社可乐丽 | 燃料容器 |
JP7246169B2 (ja) * | 2018-11-22 | 2023-03-27 | 株式会社クラレ | ブロー成形容器、並びにこれを備える燃料容器及びボトル容器 |
JP7195891B2 (ja) * | 2018-11-22 | 2022-12-26 | 株式会社クラレ | 蒸着フィルム、包装材、及び真空断熱体 |
CN111542568B (zh) * | 2017-12-28 | 2023-04-14 | 株式会社可乐丽 | 树脂组合物、其制造方法 |
JP7226976B2 (ja) * | 2018-11-22 | 2023-02-21 | 株式会社クラレ | フィルム及びその製造方法、包装材、並びに真空包装袋 |
JP7407336B2 (ja) | 2021-12-21 | 2023-12-28 | 株式会社クラレ | 樹脂組成物、ならびにそれを用いたパージング剤および成形機のパージング方法 |
Citations (6)
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JPH06285955A (ja) * | 1993-03-31 | 1994-10-11 | Sekisui Chem Co Ltd | 押出機の停止方法及び始動方法 |
JPH09323345A (ja) * | 1996-06-05 | 1997-12-16 | Toshiba Mach Co Ltd | 加熱バレルの温度制御装置 |
JPH1016024A (ja) * | 1996-06-26 | 1998-01-20 | Nippon Synthetic Chem Ind Co Ltd:The | パージング剤 |
JP2002052659A (ja) * | 2000-08-08 | 2002-02-19 | Kuraray Co Ltd | ガソリンバリア性に優れた燃料容器用多層成形部品 |
JP2002307506A (ja) * | 2001-04-11 | 2002-10-23 | Niigata Tekko Seikeiki Kk | 射出成形機の温度設定方法および温度設定装置 |
JP2003192016A (ja) * | 2001-12-26 | 2003-07-09 | Toray Ind Inc | 多層中空容器およびその製造方法 |
Family Cites Families (5)
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JP4208974B2 (ja) * | 1995-05-12 | 2009-01-14 | 株式会社クラレ | 燃料容器 |
EP0813948B1 (en) * | 1996-06-18 | 2003-10-08 | Kuraray Co., Ltd. | Purging agent and purging method |
KR100497271B1 (ko) * | 1998-10-07 | 2005-06-29 | 가부시키가이샤 구라레 | 에틸렌-비닐 알콜 공중합체로 이루어진 수지 조성물, 이를 함유하는 다층 구조체 및 이의 제조방법 |
US6964990B2 (en) * | 1999-12-16 | 2005-11-15 | Kuraray Co., Ltd. | Ethylene-vinyl alcohol copolymer resin composition of improved long-run workability, and its shaped articles |
JP2002210889A (ja) * | 2001-01-19 | 2002-07-31 | Nippon Synthetic Chem Ind Co Ltd:The | 多層容器 |
-
2003
- 2003-10-14 JP JP2003353790A patent/JP4527957B2/ja not_active Expired - Fee Related
-
2004
- 2004-10-13 WO PCT/JP2004/015071 patent/WO2005035223A1/ja active Application Filing
- 2004-10-13 AT AT04792312T patent/ATE528121T1/de not_active IP Right Cessation
- 2004-10-13 US US10/576,073 patent/US20070029689A1/en not_active Abandoned
- 2004-10-13 CN CNB2004800302504A patent/CN100537189C/zh active Active
- 2004-10-13 EP EP04792312A patent/EP1674237B1/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06285955A (ja) * | 1993-03-31 | 1994-10-11 | Sekisui Chem Co Ltd | 押出機の停止方法及び始動方法 |
JPH09323345A (ja) * | 1996-06-05 | 1997-12-16 | Toshiba Mach Co Ltd | 加熱バレルの温度制御装置 |
JPH1016024A (ja) * | 1996-06-26 | 1998-01-20 | Nippon Synthetic Chem Ind Co Ltd:The | パージング剤 |
JP2002052659A (ja) * | 2000-08-08 | 2002-02-19 | Kuraray Co Ltd | ガソリンバリア性に優れた燃料容器用多層成形部品 |
JP2002307506A (ja) * | 2001-04-11 | 2002-10-23 | Niigata Tekko Seikeiki Kk | 射出成形機の温度設定方法および温度設定装置 |
JP2003192016A (ja) * | 2001-12-26 | 2003-07-09 | Toray Ind Inc | 多層中空容器およびその製造方法 |
Also Published As
Publication number | Publication date |
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CN1867441A (zh) | 2006-11-22 |
US20070029689A1 (en) | 2007-02-08 |
EP1674237A4 (en) | 2011-01-05 |
EP1674237A1 (en) | 2006-06-28 |
JP2005119039A (ja) | 2005-05-12 |
ATE528121T1 (de) | 2011-10-15 |
CN100537189C (zh) | 2009-09-09 |
JP4527957B2 (ja) | 2010-08-18 |
EP1674237B1 (en) | 2011-10-12 |
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