WO2018135476A1 - 表面に油膜を有する構造体 - Google Patents
表面に油膜を有する構造体 Download PDFInfo
- Publication number
- WO2018135476A1 WO2018135476A1 PCT/JP2018/000977 JP2018000977W WO2018135476A1 WO 2018135476 A1 WO2018135476 A1 WO 2018135476A1 JP 2018000977 W JP2018000977 W JP 2018000977W WO 2018135476 A1 WO2018135476 A1 WO 2018135476A1
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- WIPO (PCT)
- Prior art keywords
- lubricant
- layer
- olefin resin
- silica
- oil film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B1/00—Layered products having a non-planar shape
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/38—Esters of polyhydroxy compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M105/56—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen
- C10M105/68—Amides; Imides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M107/04—Polyethylene
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/14—Composite materials or sliding materials in which lubricants are integrally molded
Definitions
- the present invention relates to a structure having an oil film formed on the surface, and more particularly, to a structure having a surface with improved slipperiness against water-containing substances by the oil film.
- Plastics are widely used for various applications because they are easy to mold and can be easily molded into various forms.
- the direct blow bottle in which the inner surface of the container wall is formed of an olefin resin such as low-density polyethylene uses its squeeze property and squeeze property to provide a particularly viscous fluid substance such as ketchup or mayonnaise.
- a storage container Widely used as a storage container.
- Means for manufacturing is also known (see, for example, Patent Document 1 or Patent Document 2). According to such means, predetermined irregularities are formed on the surface of the base material in accordance with the particle size and the amount of inorganic fine particles blended in the resin forming the base material surface.
- liquid film when the liquid film is formed as described above to improve the slipperiness with respect to the viscous substance, the liquid film on the surface may be formed unevenly. For this reason, the inconvenience that a viscous substance adheres to a part of the substrate surface may occur.
- oily film oil film
- such a problem tends to occur.
- Patent No. 5971337 Japanese Patent Laying-Open No. 2015-227012
- an object of the present invention is to provide a structure in which the oil film formed on the surface is stably formed and the slipperiness with respect to the viscous water-containing substance is stably exhibited over the entire surface.
- the present inventors conducted a lot of experiments and examined the above problems. As a result, when the surface of the base material is formed of an olefin resin and a lubricant is blended in the olefin resin, the inventors have found that the formation of an oil film becomes unstable by the lubricant and completed the present invention. .
- a structure having a base having a surface formed of a lubricant and a silica-containing olefin resin, and an oil film formed on the surface The lubricant and the silica-containing olefin resin are provided with a structure in which silica particles are dispersed as an additive for preventing the bleeding of the lubricant.
- the substrate has a multilayer structure
- the multilayer structure includes a lubricant and a silica-containing olefin resin layer, a lubricant-containing olefin resin layer, and a gas barrier resin layer in this order from the surface side on which the oil film is formed.
- the ratio of the thickness of the lubricant-containing olefin resin layer to the thickness of the lubricant and silica-containing olefin resin layer is 2 to 6,
- the lubricant is contained in the lubricant and the silica-containing olefin resin layer in an amount of 0.02 to 5 parts by mass per 100 parts by mass of the olefin resin.
- the oil film is formed from glycerin fatty acid ester, liquid paraffin, or edible oil and fat, (5) the base is a container containing a hydrated substance as a content; (6) It has an oil film, a lubricant and a silica-containing olefin resin layer, a lubricant-containing olefin resin layer, a gas barrier resin layer and an outer surface layer in order from the inside of the container.
- the outer surface layer and the lubricant and silica-containing olefin resin layer are formed of the same olefin resin, (7) the lubricant is an unsaturated fatty acid amide; (8)
- the silica particles are hydrophilic silica particles, and are dispersed in the lubricant and the silica-containing olefin resin layer in an amount of 5% by mass or less, (9)
- the average primary particle diameter of the silica particles is 1 to 50 ⁇ m, Is preferred.
- hydrophilic silica particles mean silica particles that have not been surface-treated with a hydrophobizing agent. That is, the hydrophilic silica particles have silanol groups on their surfaces.
- the structure of the present invention has an oil film formed on its surface, it has excellent slipperiness with respect to viscous water-containing substances.
- a particularly important feature is that a lubricant and silica particles are blended in the olefin resin forming the substrate surface.
- an oil film is formed on the surface of the substrate, and this oil film sufficiently improves the slipperiness with respect to the viscous water-containing substance. Therefore, the lubricant in the olefin resin forming the substrate surface is not blended for the purpose of improving the slipperiness.
- Olefinic resins do not have polar groups in their molecules and have an extremely high affinity for oily liquids, so they have excellent oil film retention. For this reason, in this invention, a base-material surface is formed with an olefin resin.
- the olefin resin an olefin resin commercially available for industrial use can be used, and some of these olefin resins contain a lubricant from the beginning.
- thermoplastic resins not limited to olefin resins
- the silica particles function as an additive for preventing the lubricant from bleeding and the bleeding to the surface of the lubricant is effectively prevented.
- Such a structure of the present invention exhibits a stable slipping property with respect to a water-containing substance, and, for example, as a packaging material such as a container or a lid material in which a viscous water-containing substance such as ketchup, mayonnaise, or dressing is stored. Preferably used.
- the structure of the present invention comprises a substrate 1 having at least a surface formed of a lubricant and an olefin resin containing silica particles, and an oil film 3 formed on the surface (particularly the inner surface) of the substrate 1.
- olefin resin used for forming the surface of the substrate those known per se are used.
- olefin polymers such as low density polyethylene, linear low density polyethylene, medium or high density polyethylene, polypropylene, poly (1-butene), poly (4-methyl-1-pentene), and copolymers of these olefins. Polymerized resins and blends are used.
- this structure is used as a squeeze container for extracting the contents, it is preferable to use an ethylene-based resin typified by low-density polyethylene or linear low-density polyethylene.
- the lubricant contained in the said olefin resin is mix
- Fatty acids such as stearic acid, lauric acid; Aliphatic amides such as stearic acid amide, palmitic acid amide, oleic acid amide, erucic acid amide, methylene bis stearic acid amide, ethylene bis stearic acid amide, ethylene bis behenic acid amide, ethylene bis oleic acid amide, linoleic acid amide, Linolenic acid amide; Fatty acid esters such as butyl stearate, hydrogenated castor oil, ethylene glycol monostearate; Alcohols such as cetyl alcohol, stearyl alcohol; Metal soaps such as zinc stearate, calcium stearate;
- the present invention is most effective when an olefin resin containing an aliphatic amide as a lubricant is used.
- Aliphatic amides especially oleic acid amides, which are unsaturated fatty acid amides, have the highest liquid repellency with respect to oily liquids. Therefore, when the surface of the substrate 1 is formed with an olefin resin in which an aliphatic amide is blended as a lubricant, the formation of the oil film 3 is most difficult.
- such a lubricant is included. This is because it is possible to form a stable and uniform oil film 3 even when the oil film is present.
- fatty acid amides having an unsaturated bond such as oleic acid amide, erucic acid amide, ethylenebisoleic acid amide, linoleic acid amide or linolenic acid amide, are present in the presence of unsaturated bonds in the molecular skeleton. Therefore, it has high mobility and is easy to bleed. Even when such a lubricant is used, bleeding of the lubricant onto the surface of the substrate is effectively prevented, and an oil film having a uniform thickness can be formed, so that the effects of the present invention are remarkably exhibited.
- the above-mentioned lubricant is blended for imparting properties such as releasability, and its content is extremely small, being 0.02 to 5 parts by mass per 100 parts by mass of the olefin resin, and the amount of bleeding. From the viewpoint of suppressing the content, it is preferably 0.02 to 0.08 parts by mass.
- the silica particles are used as an additive for preventing bleeding that prevents bleeding of the lubricant.
- the blending amount of the silica particles is preferably 100 to 28,000 parts by weight, more preferably 300 to 20,000 parts by weight, and more preferably 1,000 to 18,000 parts by weight per 100 parts by weight of the lubricant contained in the olefin resin. Is particularly preferred. That is, even if the silica particles are blended in excess, the anti-bleeding effect is not improved, but rather, the moldability of the olefin resin is impaired, or the silica particles are not used as an additive for preventing bleeding. It may function as a surface-imparting agent, and large irregularities may be formed on the surface of the substrate.
- the blending amount of the silica particles is preferably 5.5 parts by mass or less per 100 parts by mass of the olefin resin.
- the silica particle used by this invention is not used as a roughening agent, the compounding quantity may be quite small compared with the case where it is used as a roughening agent.
- the blending amount of silica particles is 1.0 parts by mass or less, particularly 0.5 to 0.8 parts by mass, more preferably about 0.5 to 0.6 parts by mass per 100 parts by mass of the olefin resin. It may be.
- inorganic oxide particles other than silica particles such as alumina and titanium oxide is also conceivable.
- these inorganic oxide particles hardly exhibit the function of preventing the bleeding of the lubricant, the object of the present invention to form a homogeneous oil film 3 cannot be achieved.
- silica particles preferably have a large specific surface area in order to prevent bleeding of the lubricant onto the surface of the substrate by surface adsorption to the lubricant (particularly fatty acid amide).
- the average primary particle diameter of the added silica particles is preferably as small as possible, less than 50 ⁇ m, less than 20 ⁇ m, less than 10 ⁇ m, If it is remarkably less than 1 ⁇ m, the surface area of the silica particles with respect to the addition amount of the silica particles increases, and the bleeding prevention function is improved.
- silica particles of less than 1 ⁇ m are liable to cause secondary aggregation in the olefin resin as a substrate, making it difficult to uniformly disperse.
- the surface area of the silica particles that cause surface adsorption becomes remarkably small with respect to the amount of silica particles added, so the average primary particle diameter is preferably 1 ⁇ m or more. From the above viewpoint, it is preferable that the average primary particle diameter is usually in the range of about 1 to 20 ⁇ m in order to uniformly disperse in the olefin resin and to express a uniform bleeding preventing effect over the entire surface of the substrate.
- silica particles may be surface-treated, but may not be surface-treated.
- the surface treatment agent for surface treatment of silica particles include silicon hydrophobizing agents such as silane compounds, siloxane compounds, and silazane compounds.
- hydrophilic silica particles it is preferable to use hydrophilic silica particles in order to most effectively exert the anti-bleeding effect on lubricants, particularly fatty acid amides.
- the silanol group exists on the surface of the hydrophilic silica particles not subjected to the surface treatment with the hydrophobizing agent, the fatty acid amide is adsorbed on the silica surface due to the interaction between the silanol group and the amide group of the fatty acid amide. This is because bleeding is presumed to be suppressed.
- the blending amount of the hydrophilic silica is as described above. From the viewpoint of a bleeding prevention effect, dispersibility, and moldability, the amount of the hydrophilic silica dispersed in the lubricant and the silica-containing olefin resin layer is 5% by mass or less. Preferably it is.
- the thickness of each layer of the substrate 1 is not particularly limited, but the inner surface layer is preferably 10 to 25 ⁇ m in the body portion.
- the ratio of the thickness of the lubricant-containing olefin resin layer to the thickness of the lubricant and silica-containing olefin resin layer is preferably 2 to 6. That is, even when the thickness of the lubricant-containing olefin resin layer is large, bleeding of the lubricant to the substrate surface is effectively prevented, and the effect of the present invention is exhibited.
- the substrate 1 having a surface formed of the above-described lubricant and silica-containing olefin resin can be used in various forms.
- the surface on the side in contact with the viscous water-containing substance only needs to be formed of the olefin resin.
- the substrate 1 may have a single-layer structure made of the olefin resin as described above, but is usually a laminated structure with other materials on the condition that the surface is formed of the olefin resin. It is desirable to have For example, a metal foil, glass, paper, or another resin layer can be laminated below the surface resin layer formed of the olefin-based resin, depending on the form. In creating such a laminated structure, an appropriate adhesive can be used as appropriate in order to increase the adhesive strength with the metal foil or other resin layer.
- aluminum foil is usually used as the metal foil.
- Such a form using an aluminum foil is particularly suitable for making a pouch.
- the structure in which other resin layers are laminated is suitable for the form of a container such as a bottle or a cup.
- a gas barrier resin layer typified by an ethylene-vinyl alcohol copolymer, or an oxygen absorbing layer containing an oxidizable polymer and a transition metal catalyst, particularly as an intermediate layer.
- a regrind layer containing scraps such as burrs generated during molding.
- an adhesive resin layer known per se can be provided for adhesion of each layer.
- the outer surface can be formed of a polyester resin such as PET.
- a preferable multilayer structure of the substrate 1 includes an inner surface layer formed of the above-described lubricant and silica-containing olefin resin, and a gas barrier resin layer, an oxygen absorbing layer, a grind layer, an adhesive resin, and the like.
- the structure includes an intermediate layer and the outer surface layer is formed of an olefin resin.
- a single olefin resin is used, and a predetermined amount of silica particles may be blended only in the olefin resin used for forming the inner surface layer.
- the inner surface layer and the outer surface layer it is not necessary to use different grades of olefinic resins for forming the inner surface layer and the outer surface layer, and the inner surface layer and the outer surface layer can be formed of the same olefinic resin. Very advantageous. In addition, it is possible to easily develop characteristics such as flexibility of the olefin resin on the inner and outer surfaces.
- the multilayer structure of the present invention includes an inner surface layer formed of the above-mentioned lubricant and a silica-containing olefin resin, and a lubricant-containing olefin which is a second inner layer adjacent to the inner surface layer.
- the gas barrier resin layer has an effect of blocking the migration of the lubricant. Therefore, the lubricant in the second inner layer cannot be transferred to the gas barrier resin layer side, but is selectively transferred to the inner surface layer side. In this case, the total amount of the lubricant that moves to the inner surface layer side is larger than that in the case where the gas barrier resin layer is not provided as the adjacent layer of the second inner layer, and the lubricant is likely to bleed on the substrate surface.
- lubricant of the present invention and the silica-containing olefin resin layer as the inner surface layer, it is possible to effectively prevent the lubricant repelling the oily liquid from bleeding on the surface of the substrate.
- a homogeneous oil film can be formed on the surface.
- an adhesive layer may be disposed between the lubricant-containing olefin resin layer and the gas barrier resin layer as necessary. This is because the adhesive layer is usually thin and has little influence on the migration of the lubricant.
- ethylene-vinyl alcohol copolymer (EVOH) or polyamide can be used alone or blended. Also, EVOH or a blend of polyamide and polyolefin resin can be used.
- Such a single-layer or multi-layer structure has a known molding method, for example, a film molding method such as a cast method, a T-die method, a calender method, an inflation method, or the like depending on the form; sandwich lamination; co-extrusion molding Co-injection molding; compression molding; vacuum molding;
- a cup shape, a tray shape, or a bottle shape is formed by molding a preform in the form of a sheet, pipe, test tube, etc., and then performing secondary molding such as plug assist molding or blow molding.
- the oil film 3 formed on the surface of the substrate 1 is formed of an oily liquid that improves slipperiness with respect to a viscous water-containing substance.
- an oily liquid must naturally be a non-volatile liquid having a low vapor pressure under atmospheric pressure, for example, a high boiling point liquid having a boiling point of 200 ° C. or higher. This is because when a volatile liquid is used, it easily evaporates and disappears with time, and it becomes difficult to form the oil film 3.
- oily liquids include various ones on the condition that they are high boiling liquids as described above.
- an oily liquid whose surface tension is significantly different from a viscous water-containing substance to be slidable has a higher lubricating effect and is suitable for the present invention.
- Typical examples of such oily liquids include glycerin fatty acid esters, liquid paraffin, and edible oils (edible oils).
- edible fats and oils are optimal.
- edible oils examples include soybean oil, rapeseed oil, olive oil, rice oil, corn oil, ben flower oil, sesame oil, palm oil, castor oil, avocado oil, coconut oil, almond oil, walnut oil, sandwich oil, Salad oil etc. can be used conveniently.
- the oil film 3 made of an oily liquid as described above is usually 1.0 to 50 g / m 2 , particularly 3.0 to 20 g / m 2 in an amount of the surface of the substrate 1 (in the case where the substrate 1 is a packaging material, the inner surface). ).
- the oil film 3 having such a thickness is uniformly formed over the entire surface of the substrate 1. In other words, there is no region where the oil film 3 is not formed on the surface of the substrate 1. Therefore, excellent slipperiness is exhibited evenly over the entire surface of the substrate 1. As a result, for example, it is possible to reliably prevent inconveniences such as viscous water-containing substances adhering to a part of the surface.
- the oil film 3 when the amount or thickness of the oil film 3 is larger than the above range, the oil film 3 is likely to drop off. When the amount or thickness is smaller than the above range, the oil film 3 is not formed homogeneously or the oil film is formed. 3 is formed discontinuously.
- the oil film 3 described above is formed by applying an oily liquid that forms the oil film 3 to the surface of the base 1 that has been formed in advance by spraying, dipping, roll coating, or the like.
- the oil film 3 can also be formed by supplying an oily liquid together with the blow fluid.
- molding is also known, in manufacturing the structure 1 of this invention Such an approach is not appropriate. This is because silica particles for suppressing bleeding are blended in the surface-forming olefin resin.
- the surface of the substrate 1 on which the oil film 3 is to be formed is roughened by post-processing such as a known blasting process prior to the formation of the oil film 3. It is also possible to adopt such means. Thereby, the retainability of the oil film 3 can be further improved.
- the structure of the present invention described above can sufficiently exhibit the surface characteristics of the oil film 3 and improve the slipperiness with respect to a viscous water-containing substance. Therefore, the structure of the present invention is filled with viscous water-containing contents such as ketchup, aqueous paste, honey, various sauces, mayonnaise, mustard, dressing, jam, chocolate syrup, yogurt, and milky lotion. Suitable as a container, particularly as a direct blow molded container.
- silica fine particles are blended in the olefin resin forming the surface, a viscous film is formed by forming an oil film on the surface regardless of whether or not a lubricant is blended in the olefin resin used. It is possible to ensure excellent slipperiness against a hydrated substance. Therefore, there is a great advantage that it is not necessary to select the composition of the olefin resin in industrial implementation.
- Example 1 Using four extruders, four types and six layers of multilayer parison were formed. Subsequently, a multilayer bottle (internal volume: 400 ml) having the following four types and six layers was obtained by known direct blow molding using this multilayer parison. The total thickness of the barrel portion of the multilayer bottle is 400 ⁇ m, and the layer composition ratio is as follows (unit: wt%). Outer surface layer (10.9) / Blend gas barrier layer (2.7) / Main layer (67.7) / Blend gas barrier layer (2.4) / Second inner layer (12. 3) / Inner surface layer (4.0)
- the materials used for each layer are as follows. Outer surface layer; Low density polyethylene (LDPE) MFR: 0.3 g / 10 min (190 ° C., 2.16 Kg) Density: 0.922 g / cm 3 Lubricant (0.03 parts by weight oleic amide per 100 parts by weight LDPE) Blended gas barrier layer; Blend of EVOH copolymer and olefin resin Main layer; Low density polyethylene (LDPE) MFR: 0.3 g / 10 min (190 ° C., 2.16 Kg) Density: 0.922 g / cm 3 Lubricant (0.03 parts by weight oleic amide per 100 parts by weight LDPE) Second inner layer; Low density polyethylene (LDPE) MFR: 0.3 g / 10 min (190 ° C., 2.16 Kg) Density: 0.922 g / cm 3 Lubricant (0.03 parts by weight oleic amide per 100 parts by weight LDPE) Inner surface layer; Blend
- Examples 2 to 4 The resin composition used for the inner surface layer was changed to the following resin composition, and a multilayer bottle was molded in the same procedure as in Example 1 except that the layer composition ratio was changed to the following layer composition ratio. A spray coatability test was conducted. The results are shown in Table 1.
- Blend of low density polyethylene (LDPE) silica LDPE: silica 97: 3 (weight ratio) LDPE MFR: 0.3 g / 10 min (190 ° C., 2.16 Kg) LDPE density: 0.922 g / cm 3 Lubricant (0.03 parts by weight oleic amide per 100 parts by weight LDPE) Layer composition ratio in Example 2; Outer surface layer (10.8) / Blend gas barrier layer (2.9) / Intermediate layer ( 68.7) / Blend gas barrier layer (2.6) / second inner layer (11.9) ) / Inner surface layer (3.1) Layer composition ratio in Example 3; Outer surface layer (11.2) / Blend gas barrier layer (2.6) / Intermediate layer ( 67.2) / Blend gas barrier layer (2.2) / second inner layer (12.3) ) / Inner surface layer (4.5) Layer composition ratio in Example 4; Outer surface layer (10.8) / Blend gas barrier layer (3.0) / Intermediate layer ( 65.6) / Blend gas barrier layer (2.5
- Examples 5 to 8> The resin composition used for the inner surface layer was changed to the following resin composition, and a multilayer bottle was molded in the same procedure as in Example 1 except that the layer composition ratio was changed to the following layer composition ratio. A spray coatability test was conducted. The results are shown in Table 1.
- Blend of low density polyethylene (LDPE) silica LDPE: silica 95: 5 (weight ratio) LDPE MFR: 0.3 g / 10 min (190 ° C., 2.16 Kg) LDPE density: 0.922 g / cm 3 Lubricant (0.03 parts by weight oleic amide per 100 parts by weight LDPE) Layer composition ratio in Example 5; Outer surface layer (11.0) / Blend gas barrier layer (2.8) / Intermediate layer ( 68.6) / Blend gas barrier layer (2.5) / second inner layer (11.8) ) / Inner surface layer (3.3) Layer composition ratio in Example 6; Outer surface layer (11.0) / Blend gas barrier layer (2.8) / Intermediate layer ( 67.2) / Blend gas barrier layer (2.6) / second inner layer (12.2) ) / Inner surface layer (4.2) Layer composition ratio in Example 7; Outer surface layer (9.0) / Blend gas barrier layer (1.7) / Intermediate layer (5 9.0) / Blend gas barrier layer (2.1)
- LDPE low density polyethylene
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Abstract
Description
ところで、粘稠な流動性物質が収容される容器では、該内容物を速やかに排出し且つ容器内に残存させることなくきれいに排出して最後まで使いきるために、内容物に対して容器内面が高い滑り性を示すことが求められる。
かかる技術によれば、基材表面を形成する樹脂に滑剤などの添加剤を加える場合と比して、滑り性を飛躍的に高めることができるため、現在注目されている。
このような微細な凹凸は、通常、液膜を形成すべき基材表面に、無機微粒子が分散されたエタノール溶液などのコーティング液をスプレー噴霧し、乾燥することにより形成することができる。また、基材表面形成用の樹脂に無機微粒子が配合された樹脂組成物を使用し、かかる樹脂組成物を用いて延伸成形等の成形を行い、所定の形状を有する基材(例えば容器)を製造するという手段も知られている(例えば、特許文献1又は特許文献2参照)。かかる手段によれば、基材表面を形成している樹脂に配合されている無機微粒子の粒径や配合量に応じて、基材表面に所定の凹凸が形成されることとなる。
前記滑剤及びシリカ含有オレフィン系樹脂には、滑剤のブリーディング防止用添加剤として、シリカ粒子が分散されていることを特徴とする構造体が提供される。
(1)前記基体は、多層構造を有しており、
前記多層構造は、前記油膜が形成されている表面側から滑剤及びシリカ含有オレフィン系樹脂層、滑剤含有オレフィン系樹脂層及びガスバリア性樹脂層をこの順に含むこと、
(2)前記滑剤及びシリカ含有オレフィン系樹脂層の厚みに対する前記滑剤含有オレフィン系樹脂層の厚みの比率が2~6であること、
(3)前記滑剤が、前記滑剤及びシリカ含有オレフィン系樹脂層中、オレフィン樹脂100質量部当り0.02~5質量部の量で含有されていること、
(4)前記油膜が、グリセリン脂肪酸エステル、流動パラフィン、または食用油脂から形成されていること、
(5)前記基体が、含水物質を内容物とする容器であること、
(6)前記容器の内側から順に油膜、滑剤及びシリカ含有オレフィン系樹脂層、滑剤含有オレフィン系樹脂層、ガスバリア性樹脂層並びに外表面層を有しており、
前記外表面層と滑剤及びシリカ含有オレフィン系樹脂層とが、同一のオレフィン系樹脂により形成されていること、
(7)前記滑剤が不飽和脂肪酸アミドであること、
(8)前記シリカ粒子が親水性シリカ粒子であり、前記滑剤及びシリカ含有オレフィン系樹脂層中に5質量%以下の量で分散していること、
(9)前記シリカ粒子の平均一次粒子径が1~50μmであること、
が好適である。
尚、本願明細書では、親水性シリカ粒子は、特記しない限り、疎水化剤による表面処理がされていないシリカ粒子を意味する。即ち、前記親水性シリカ粒子は、その表面にシラノール基を有している。
オレフィン系樹脂は、分子中に極性基を有しておらず、油性液体に対する親和性が極めて高いため、油膜の保持性に優れている。このため、本発明では、オレフィン系樹脂により基体表面を形成する。前記オレフィン系樹脂としては、工業用に市販されているオレフィン系樹脂を用いることができるが、このようなオレフィン系樹脂には、初めから滑剤が配合されているものがある。オレフィン系樹脂に限らず、一般の熱可塑性樹脂の多くは、所定の成形型を用いての熱成形により、所定形状に成形されるため、離型性を持たせるため、予め滑剤を配合しておくことにより、成形時に滑剤を配合するという作業を省略できるからである。
このような滑剤の配合量は微量であるため、通常は樹脂の性状等に悪影響を与えることはない。しかし、本発明者等の研究によると、滑剤が配合されているオレフィン系樹脂を用いての成形により表面が形成されている基体では、その表面に均一な油膜を形成することが困難であることが判った。その理由は、オレフィン系樹脂に滑剤が配合されている場合、表面への滑剤のブリード量が多く、しかも、この滑剤は、油性液体に対する撥液性が高いからである。即ち、滑剤がブリードした表面に油性液体を塗布して油膜を形成する場合、滑剤がブリードした部分で油性液体がはじかれてしまうため、油膜厚みが大きくばらついたり、油膜が形成されていない部分が生じたりする。この結果、このような部分に粘稠な含水物質が付着してしまったり、又は滑り性が大きく低下しまうこととなる。
本発明の構造体は、少なくとも表面が滑剤とシリカ粒子含有のオレフィン系樹脂により形成されている基体1と、基体1の表面(特に内面)に形成された油膜3とからなる。
脂肪酸、例えばステアリン酸、ラウリン酸;
脂肪族アミド、例えばステアリン酸アミド、パルミチン酸アミド、オレ
イン酸アミド、エルカ酸アミド、メチレンビスステアリン酸アミド、エチ
レンビスステアリン酸アミド、エチレンビスベヘン酸アミド、エチレンビ
スオレイン酸アミド、リノール酸アミド、リノレン酸アミド;
脂肪酸エステル、例えばブチルステアレート、硬化ヒマシ油、エチレン
グリコールモノステアレート;
アルコール、例えばセチルアルコール、ステアリルアルコール;
金属石ケン、例えばステアリン酸亜鉛、ステアリン酸カルシウム;
上述した脂肪族アミドの中でも、不飽和結合を有する脂肪酸アミド、例えば、オレイン酸アミド、エルカ酸アミド、エチレンビスオレイン酸アミド、リノール酸アミド又はリノレン酸アミドは、分子骨格中の不飽和結合の存在により、運動性が高くブリードしやすい。このような滑剤を用いた場合にも、滑剤の基体表面へのブリーディングが有効に防止され、均一な厚みの油膜を形成することができる点で、本発明の効果が極めて顕著に発揮される。
また、上記シリカ粒子の配合量は、上記オレフィン系樹脂100質量部当り5.5質量部以下が好ましい。尚、本発明で用いるシリカ粒子は、粗面化剤として使用されるものではないため、粗面化剤として使用される場合に比して、その配合量はかなり少なくてもよい。例えば、シリカ粒子の配合量は、オレフィン系樹脂100質量部当り1.0質量部以下、特に0.5~0.8質量部、さらには0.5~0.6質量部程度の微量の範囲であってもよい。
一方で、1μm未満のシリカ粒子は基体であるオレフィン系樹脂中において、二次凝集をおこしやすく、均一な分散が困難になる。二次凝集が発生するとシリカ粒子の添加量に対し、表面吸着を起こすシリカ粒子の表面積は著しく小さくなるため、平均一次粒子径は1μm以上であることが好ましい。
以上の観点からオレフィン系樹脂に対して均一に分散させ、基体の表面全体にわたって均等なブリーディング防止効果を発現させるため、通常、その平均一次粒子径が1~20μm程度の範囲にあることが好ましい。更に、好ましい範囲且つシリカ粒子を添加する層厚みよりも十分に小さな粒径を選択することで、基体表面に不要な凹凸を発生させることを回避することも可能である。
また、このようなシリカ粒子は、表面処理されていてもよいが、表面処理されていなくてもよい。シリカ粒子を表面処理する場合の表面処理剤としては、シラン化合物、シロキサン化合物、シラザン化合物などのケイ素系疎水化剤が挙げられる。本発明において、滑剤、特に脂肪酸アミドに対するブリーディング防止効果を最も有効に発揮させるためには、親水性シリカ粒子を使用することが好ましい。疎水化剤による表面処理がされていない親水性シリカ粒子の表面には、シラノール基が存在するため、このシラノール基と脂肪酸アミドのアミド基との相互作用により、脂肪酸アミドがシリカ表面に吸着され、ブリーディングが抑制されると推測されるためである。
前記親水性シリカの配合量は、上述した通りであるが、ブリーディング防止効果、分散性及び成形性のバランスの観点から、前記滑剤及びシリカ含有オレフィン系樹脂層中に5質量%以下で分散していることが好ましい。
また、このような多層構造にあっては、上記のオレフィン系樹脂による表面層を内面とし、外面を他の樹脂により形成することも可能である。例えば、外面をPET等のポリエステル樹脂で形成することも可能である。
本発明において、好適な基体1の多層構造は、上記の滑剤及びシリカ含有オレフィン系樹脂により内表面層が形成され、且つ上記ガスバリア性樹脂の層、酸素吸収層、グラインド層、接着剤樹脂などを中間層として含み、且つ外表面層がオレフィン系樹脂により形成された構造である。このような多層構造の場合には、一つのオレフィン系樹脂を用い、内表面層の形成に使用されるオレフィン系樹脂にのみ所定量のシリカ粒子を配合すればよい。即ち、内表面層及び外表面層の形成に異なるグレードのオレフィン系樹脂を使用する必要がなく、内表面層と外表面層とを同一のオレフィン系樹脂により形成することができるため、工業的に極めて有利である。しかも、内外面にオレフィン系樹脂が有する可撓性等の特性を容易に発現させることができる。
係る利点を最大限に活かすために、本発明の多層構造体は、上記の滑剤及びシリカ含有オレフィン系樹脂により形成された内表面層、この内表面層に隣接する第二内層である滑剤含有オレフィン系樹脂層、及び中間層としてのガスバリア性樹脂層をこの順に有する。
ガスバリア性樹脂層は、滑剤の移行を遮断する効果を有する。従って、第二内層中の滑剤は、ガスバリア性樹脂層側に移行することができず、内表面層側に選択的に移行することとなる。この場合、内表面層側に移行する滑剤の総量は、第二内層の隣接層としてガスバリア性樹脂層を設けない場合と比較して大きくなり、滑剤が基体表面にブリードし易くなる。しかるに、上述したように、本発明の滑剤及びシリカ含有オレフィン系樹脂層を内表面層に用いることで、基体表面に油性液体をはじく滑剤がブリードすることを有効に防止することができるため、基体表面上に均質な油膜を形成することができる。
上記の滑剤及びシリカ含有オレフィン系樹脂により内表面層が形成され、且つこの内表面層に隣接する第二内層として、滑剤含有オレフィン系樹脂層、中間層としてガスバリア性樹脂層の順に配置された多層構造体において、滑剤含有オレフィン系樹脂層とガスバリア性樹脂層との間には必要に応じて接着層を配置しても良い。通常、接着層は薄く、滑剤の移行にはほとんど影響を与えないと考えられるためである。ガスバリア性樹脂層としては、エチレン-ビニルアルコール系共重合体(EVOH)又はポリアミドを単独またはブレンドして用いることができる。また、EVOH又はポリアミドとポリオレフィン系樹脂とのブレンド物を用いることも出来る。
かかる油性液体は、当然、大気圧下での蒸気圧が小さい不揮発性の液体、例えば沸点が200℃以上の高沸点液体でなければならない。揮発性液体を用いた場合には、容易に揮散して経時と共に消失し、油膜3を形成することが困難となってしまうからである。
例えば、表面張力が10乃至40mN/m、特に16乃至35mN/mの範囲にある油性液体を用いることが好ましい。このような油性液体の代表的な例としては、グリセリン脂肪酸エステル、流動パラフィン、食用油脂(食用油)が挙げられる。特に、粘稠な含水物質が食品類である場合には、食用油脂が最適である。
このような食用油脂としては、大豆油、菜種油、オリーブオイル、米油、コーン油、べに花油、ごま油、パーム油、ひまし油、アボガド油、ココナッツ油、アーモンド油、クルミ油、はしばみ油、サラダ油などが好適に使用できる。
尚、油膜3の量又は厚みが上記範囲よりも大きい場合には、油膜3の脱落などを生じ易くなってしまい、上記範囲よりも少ない場合には、油膜3が均質に形成されず、又は油膜3が不連続に形成されてしまう。
尚、上記の油性液体を表面形成用のオレフィン系樹脂に混合しておき、成形後のブリーディングにより表面に油膜を形成するという手法も知られているが、本発明の構造体1を製造するには、かかる手法は適当ではない。表面形成用のオレフィン系樹脂にブリーディング抑制のためのシリカ粒子が配合されているからである。
特に本発明は、表面を形成するオレフィン系樹脂にシリカ微粒子を配合しておけば、使用するオレフィン系樹脂に滑剤が配合されているか否かにかかわらず、表面に油膜を形成することにより粘稠な含水物質に対する優れた滑り性を確保することができる。そのため、工業的実施に際して、オレフィン系樹脂の組成を選択する必要がないという大きな利点を有する。
尚、以下の実験例等で行った各種の特性、物性等の測定方法は次の通りである。
後述の方法で作製した構造体表面(ボトル内面)の油接触角を固液界面解析システムDropMaster700(協和界面科学(株)製)を用いて測定した。油としてサラダ油を用い、大気中において、サラダ油が構造体表面に滴下されてから60秒後の油接触角(1μL)の値を測定した。この値が10度以下であれば、油が良く濡れ拡がり、均一な油膜が塗工できると判断できる。
2.スプレー塗工性試験
後述の方法で作製した構造体表面(ボトル内面)に対し、サラダ油をスプレー塗工し、スプレー塗工性を評価した。評価基準は次の通りである。
良好:サラダ油がはじかれることなく、油膜が形成される。
不良:サラダ油がはじかれ、油膜が形成されていない部分が存在する。
4つの押出機を用い、4種6層の多層パリソンを成形した。次いで、この多層パリソンを用いての公知のダイレクトブロー成形により、下記の4種6層の層構成の多層ボトル(内容積:400ml)を得た。多層ボトルの胴部総厚みは400μmで、層構成比は下記の通りである(単位:wt%)。
外表面層(10.9)/ブレンド系ガスバリア層(2.7)/メイン層
(67.7)/ブレンド系ガスバリア層(2.4)/第二内層(12.
3)/内表面層(4.0)
外表面層;
低密度ポリエチレン(LDPE)
MFR:0.3g/10min(190℃、2.16Kg)
密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
ブレンド系ガスバリア層;
EVOH共重合体とオレフィン系樹脂のブレンド
メイン層;
低密度ポリエチレン(LDPE)
MFR:0.3g/10min(190℃、2.16Kg)
密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
第二内層;
低密度ポリエチレン(LDPE)
MFR:0.3g/10min(190℃、2.16Kg)
密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
内表面層;
低密度ポリエチレン(LDPE)とシリカのブレンド
LDPE:シリカ=99:1(重量比)
LDPEのMFR:0.3g/10min(190℃、2.16Kg
)
LDPEの密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
内表面層に用いる樹脂組成物を下記の樹脂組成物に変更し、下記の層構成比に変更した以外は実施例1と同様の手順で多層ボトルを成形し、上述の油の接触角測定とスプレー塗工性試験を行った。結果を表1に示した。
内表面層;
低密度ポリエチレン(LDPE)シリカのブレンド
LDPE:シリカ=97:3(重量比)
LDPEのMFR:0.3g/10min(190℃、2.16Kg)
LDPEの密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
実施例2における層構成比;
外表面層(10.8)/ブレンド系ガスバリア層(2.9)/中間層(
68.7)/ブレンド系ガスバリア層(2.6)/第二内層(11.9
)/内表面層(3.1)
実施例3における層構成比;
外表面層(11.2)/ブレンド系ガスバリア層(2.6)/中間層(
67.2)/ブレンド系ガスバリア層(2.2)/第二内層(12.3
)/内表面層(4.5)
実施例4における層構成比;
外表面層(10.8)/ブレンド系ガスバリア層(3.0)/中間層(
65.6)/ブレンド系ガスバリア層(2.5)/第二内層(12.6
)/内表面層(5.5)
内表面層に用いる樹脂組成物を下記の樹脂組成物に変更し、下記の層構成比に変更した以外は実施例1と同様の手順で多層ボトルを成形し、上述の油の接触角測定とスプレー塗工性試験を行った。結果を表1に示した。
内表面層;
低密度ポリエチレン(LDPE)シリカのブレンド
LDPE:シリカ=95:5(重量比)
LDPEのMFR:0.3g/10min(190℃、2.16Kg)
LDPEの密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
実施例5における層構成比;
外表面層(11.0)/ブレンド系ガスバリア層(2.8)/中間層(
68.6)/ブレンド系ガスバリア層(2.5)/第二内層(11.8
)/内表面層(3.3)
実施例6における層構成比;
外表面層(11.0)/ブレンド系ガスバリア層(2.8)/中間層(
67.2)/ブレンド系ガスバリア層(2.6)/第二内層(12.2
)/内表面層(4.2)
実施例7における層構成比;
外表面層(9.0)/ブレンド系ガスバリア層(1.7)/中間層(5
9.0)/ブレンド系ガスバリア層(2.1)/第二内層(23.4)
/内表面層(4.8)
実施例8における層構成比;
外表面層(15.9)/ブレンド系ガスバリア層(4.4)/中間層(
53.4)/ブレンド系ガスバリア層(3.7)/第二内層(17.9
)/内表面層(4.7)
内表面層に用いる樹脂組成物を下記の樹脂組成物に変更した以外は実施例1と同様の手順で多層ボトルを成形し、上述の油の接触角測定と接触角測定とスプレー塗工性試験を行った。結果を表1に示した。
内表面層;
低密度ポリエチレン(LDPE)シリカのブレンド
LDPE:シリカ=99.7:0.5(重量比)
LDPEのMFR:0.3g/10min(190℃、2.16Kg)
LDPEの密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
内表面層に用いる樹脂組成物を下記の樹脂組成物に変更し、下記の層構成比に変更した以外は実施例1と同様の手順で多層ボトルを成形し、上述の油の接触角測定とスプレー塗工性試験を行った。結果を表1に示した。
内表面層;
低密度ポリエチレン(LDPE)
LDPEのMFR:0.3g/10min(190℃、2.16Kg)
LDPEの密度:0.922g/cm3
滑剤(LDPE100質量部当り0.03質量部のオレイン酸アミド)
比較例1における層構成比;
外表面層(16.1)/ブレンド系ガスバリア層(4.0)/中間層(
54.4)/ブレンド系ガスバリア層(3.3)/第二内層(17.2
)/内表面層(5.0)
さらに、本発明の構造体では、内表面層に対する第二内層の厚み比を2~5に設定しても、第二内層からの脂肪族アミドからなる滑剤のブリーディングが有効に抑制できていることが確認できた。
3:油膜
Claims (10)
- 滑剤及びシリカ含有オレフィン系樹脂により形成された表面を有する基体と、該表面上に形成された油膜を有する構造体において、
前記滑剤及びシリカ含有オレフィン系樹脂には、滑剤のブリーディング防止用添加剤として、シリカ粒子が分散されていることを特徴とする構造体。 - 前記基体は、多層構造を有しており、
前記多層構造は、前記油膜が形成されている表面側から滑剤及びシリカ含有オレフィン系樹脂層、滑剤含有オレフィン系樹脂層及びガスバリア性樹脂層をこの順に含む請求項1に記載の構造体。 - 前記滑剤及びシリカ含有オレフィン系樹脂層の厚みに対する前記滑剤含有オレフィン系樹脂層の厚みの比率が2~6である請求項2に記載の構造体。
- 前記滑剤が、前記滑剤及びシリカ含有オレフィン系樹脂層中、オレフィン樹脂100質量部当り0.02~5質量部の量で含有されている請求項1に記載の構造体。
- 前記油膜が、グリセリン脂肪酸エステル、流動パラフィン、または食用油脂から形成されている請求項1に記載の構造体。
- 前記基体が、含水物質を内容物とする容器である請求項1に記載の構造体。
- 前記容器の内側から順に油膜、内表面層としての滑剤及びシリカ含有オレフィン系樹脂層、滑剤含有オレフィン系樹脂層、ガスバリア性樹脂層並びに外表面層を有しており、
前記外表面層と滑剤及びシリカ含有オレフィン系樹脂層とが、同一のオレフィン系樹脂により形成されている請求項6に記載の構造体。 - 前記滑剤が不飽和脂肪酸アミドである請求項1に記載の構造体。
- 前記シリカ粒子が親水性シリカ粒子であり、前記滑剤及びシリカ含有オレフィン系樹脂層中に5質量%以下の量で分散している請求項8に記載の構造体。
- 前記シリカ粒子の平均一次粒子径が1~50μmである請求項1に記載の構造体。
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| KR1020197020891A KR20190097203A (ko) | 2017-01-18 | 2018-01-16 | 표면에 유막을 갖는 구조체 |
| US16/477,973 US20200123464A1 (en) | 2017-01-18 | 2018-01-16 | Structured body having oil film on surface thereof |
| AU2018210071A AU2018210071A1 (en) | 2017-01-18 | 2018-01-16 | Structured body having oil film on surface thereof |
| JP2018522821A JP6376313B1 (ja) | 2017-01-18 | 2018-01-16 | 表面に油膜を有する構造体 |
| RU2019125728A RU2710329C1 (ru) | 2017-01-18 | 2018-01-16 | Структурированное тело, имеющее масляную пленку на своей поверхности |
| EP18741196.2A EP3572230A4 (en) | 2017-01-18 | 2018-01-16 | SURFACE OIL FILM STRUCTURE |
| CA3048384A CA3048384A1 (en) | 2017-01-18 | 2018-01-16 | Structured body having oil film on surface thereof |
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| WO2022244587A1 (ja) * | 2021-05-17 | 2022-11-24 | 凸版印刷株式会社 | 包装材用フィルム、包装材、包装袋及び包装体 |
| JP2022176708A (ja) * | 2021-05-17 | 2022-11-30 | 凸版印刷株式会社 | 包装材用フィルム、包装材、包装袋及び包装体 |
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- 2018-01-16 CN CN201880006889.0A patent/CN110177689A/zh not_active Withdrawn
- 2018-01-16 KR KR1020197020891A patent/KR20190097203A/ko not_active Ceased
- 2018-01-16 US US16/477,973 patent/US20200123464A1/en not_active Abandoned
- 2018-01-16 CA CA3048384A patent/CA3048384A1/en not_active Abandoned
- 2018-01-16 EP EP18741196.2A patent/EP3572230A4/en not_active Withdrawn
- 2018-01-16 RU RU2019125728A patent/RU2710329C1/ru active
- 2018-01-16 JP JP2018522821A patent/JP6376313B1/ja active Active
- 2018-01-16 AU AU2018210071A patent/AU2018210071A1/en not_active Abandoned
- 2018-01-16 WO PCT/JP2018/000977 patent/WO2018135476A1/ja not_active Ceased
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020090018A (ja) * | 2018-12-05 | 2020-06-11 | 東洋製罐グループホールディングス株式会社 | 包装用多層構造体 |
| JP7304690B2 (ja) | 2018-12-05 | 2023-07-07 | 東洋製罐グループホールディングス株式会社 | 包装用多層構造体 |
| WO2022244587A1 (ja) * | 2021-05-17 | 2022-11-24 | 凸版印刷株式会社 | 包装材用フィルム、包装材、包装袋及び包装体 |
| JP2022176708A (ja) * | 2021-05-17 | 2022-11-30 | 凸版印刷株式会社 | 包装材用フィルム、包装材、包装袋及び包装体 |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2710329C1 (ru) | 2019-12-25 |
| JP6376313B1 (ja) | 2018-08-22 |
| CN110177689A (zh) | 2019-08-27 |
| AU2018210071A1 (en) | 2019-07-04 |
| EP3572230A4 (en) | 2020-07-22 |
| US20200123464A1 (en) | 2020-04-23 |
| CA3048384A1 (en) | 2018-07-26 |
| JPWO2018135476A1 (ja) | 2019-01-24 |
| KR20190097203A (ko) | 2019-08-20 |
| EP3572230A1 (en) | 2019-11-27 |
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