WO2015194626A1 - 流動性物質に対する滑性を向上させるための潤滑層形成用コーティング組成物 - Google Patents
流動性物質に対する滑性を向上させるための潤滑層形成用コーティング組成物 Download PDFInfo
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- WO2015194626A1 WO2015194626A1 PCT/JP2015/067576 JP2015067576W WO2015194626A1 WO 2015194626 A1 WO2015194626 A1 WO 2015194626A1 JP 2015067576 W JP2015067576 W JP 2015067576W WO 2015194626 A1 WO2015194626 A1 WO 2015194626A1
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- liquid
- solid particles
- lubricating layer
- container
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/02—Natural products
- C10M159/06—Waxes, e.g. ozocerite, ceresine, petrolatum, slack-wax
-
- 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
- C10M165/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as 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
- B32B2439/00—Containers; Receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2231/00—Means for facilitating the complete expelling of the contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2231/00—Means for facilitating the complete expelling of the contents
- B65D2231/005—Means for facilitating the complete expelling of the contents the container being rigid
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/18—Natural waxes, e.g. ceresin, ozocerite, bees wax, carnauba; Degras
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/401—Fatty vegetable or animal oils used as base material
-
- 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/055—Particles related characteristics
- C10N2020/06—Particles of special shape or size
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/015—Dispersions of solid lubricants
- C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
Definitions
- the present invention relates to a coating composition used for forming a lubricating layer for improving the lubricity with respect to a fluid substance on the surface of a base material molded into a predetermined shape.
- Containers that contain liquid contents are required to discharge the contents regardless of the material of the container.
- a low viscosity liquid such as water
- such discharge is hardly a problem.
- a viscous material such as mayonnaise or ketchup
- it may be a plastic container but glass. Whether it is a made container, this discharge is a serious problem. That is, such contents are not quickly discharged by tilting the container, and adhere to the container wall, and thus cannot be used up to the end. Especially, a considerable amount of contents are placed at the bottom of the container. Remains without being discharged.
- Patent Documents 1 and 2 various techniques have been proposed for improving the lubricity of viscous substances by forming a liquid film on the surface of the substrate.
- Patent Documents 1 and 2 various techniques have been proposed for improving the lubricity of viscous substances by forming a liquid film on the surface of the substrate.
- a container having hydrophobic oxide fine particles adhered to the inner surface has also been proposed as having excellent non-adhesiveness to the contents (Patent Document 3).
- the slipperiness expressed in such a container is considerably lower than that of a container provided with a liquid film.
- the improvement of the slipperiness with respect to the fluid substance as described above is required not only for the container but also for the lid material, and also for a member such as a pipe for allowing the viscous fluid substance to flow. There is a need for improved lubricity.
- an object of the present invention is to provide a coating composition that can form a lubricating layer that improves the lubricity of a viscous fluid substance on the surface of a substrate that has been molded into a predetermined shape.
- Another object of the present invention is to provide a method for forming a lubricating layer on the surface of a substrate used as a packaging material such as a container or a lid.
- a coating composition used for forming a lubricating layer for improving the lubricity with respect to a flowable substance on the surface of a base material molded into a predetermined shape, and comprising the lubricating layer
- a coating composition comprising a liquid as a component as a dispersion medium, and solid particles as a constituent component of the lubricating layer dispersed in the dispersion medium.
- the liquid as the dispersion medium is a high-boiling liquid having a boiling point of 200 ° C. or higher, a contact angle (20 ° C.) with respect to the substrate surface of 45 ° or less and a viscosity of 100 mPa ⁇ s or less ( 25 ° C.)
- the solid particles are dispersed in an amount of 0.01 to 20 parts by mass per 100 parts by mass of the liquid as the dispersion medium.
- the solid particles have a particle size of 5 to 300 ⁇ m;
- the solid particles are organic particles, Is preferred.
- the lubricating layer further improves the lubricity with respect to the flowable substance by spraying the above-mentioned coating composition onto the substrate surface in an amount of 1.0 to 6.2 mg / cm 2. Is provided on the substrate surface.
- a packaging material containing a fluid substance as the substrate, and spray the coating composition on the surface of the packaging material that contacts the fluid substance.
- a lubricating layer for improving the lubricity with respect to the flowable substance obtained by applying the above-described coating composition to the surface of the substrate, the lubricating layer comprising a liquid and solid particles. A formed structure is provided.
- the coating composition of the present invention has a form as a suspension in which solid particles are dispersed in a liquid as a dispersion medium, and this coating composition is formed on a substrate that is molded into a predetermined shape.
- a lubricating layer that improves the lubricity of the fluid substance.
- the liquid as the dispersion medium is a constituent component of the lubricating layer to be formed together with the solid particles dispersed in the composition (suspension), and is removed by heating or the like. It is not a thing. Therefore, the coating layer of the coating composition formed by coating on the surface of the substrate functions as a lubricating layer as it is without performing post-treatment such as heating, which is a great advantage of the present invention. is there.
- the lubricating layer formed by the coating composition of the present invention is formed from the liquid used as the dispersion medium in the coating composition and the solid particles suspended and dispersed in the coating composition.
- the lubrication layer having such a structure exhibits excellent lubricity with respect to fluid substances, and viscous fluid substances of 1260 mPa ⁇ s or more, such as mayonnaise, ketchup, aqueous glue, honey, various sauces It exhibits excellent lubricity for cosmetics such as mustards, dressings, jams, chocolate syrups and emulsions, liquid detergents, shampoos and rinses.
- the coating composition of the present invention is a means for forming a lubricating layer provided on the inner surface (the surface on which the content comes into contact) of a packaging material (such as a container or a lid) containing the viscous substance as described above. Is preferably used.
- FIG. 3A is a diagram showing the presence state of solid particles blended in a coating composition
- FIG. 3A is a model diagram of a lubricating layer when there are many solid particles
- FIG. 3B is a diagram showing solid particles. Model diagram of lubricating layer when there is little The figure for demonstrating the test conditions of a lubricity test.
- the coating composition of the present invention comprises a liquid used as a dispersion medium and solid particles dispersed in the liquid. Both of the liquid and the solid particles are obtained by applying the coating composition to a predetermined substrate. It is a constituent component of the lubricating layer obtained by applying to the surface. That is, referring to FIG. 1, the lubricating layer 3 formed by applying the coating composition of the present invention onto the surface 1 of the substrate 1 that comes into contact with the flowable substance includes a liquid 5, solid particles 7, and the like. The liquid 3 is used as a dispersion medium of the coating composition, and the solid particles 7 are used as dispersion particles in the coating composition.
- the dispersion structure of the solid particles 7 of the coating composition is reflected as it is in the lubricating layer 3, and the lubricating layer 3 is directly in contact with the fluid substance flowing on the surface 1. It will be in contact with it and exhibits excellent lubricity against such fluid substances. That is, the slipperiness is greatly improved as compared with the case where the fluid material flows directly on the surface 1.
- the slipperiness to the contents is improved by forming a film made of liquid on the inner surface of a packaging material such as a container.
- a packaging material for example, a container
- the contents are discharged from the packaging material by liquid-liquid contact.
- the contents flow down on the inner surface of the packaging material by liquid-liquid contact instead of solid-liquid contact. Therefore, if an oily material that is immiscible with the content is used as the liquid, the lubricity with respect to aqueous substances including water is improved. Furthermore, if an aqueous liquid that is immiscible with the contents is used as the liquid, the lubricity with respect to the oily substance can be improved.
- the lubricating layer 3 formed using the coating composition of the present invention has a structure in which the solid particles 5 are dispersed in the liquid 5, a liquid film formed only of the liquid 5 is provided. Compared to the case, the lubricity with respect to the flowable substance (for example, the contents of the container) is further enhanced.
- an experimental example 18 (comparative example) in which a lubricating layer (a liquid film in which solid particles are not dispersed) is formed on the surface of a polypropylene sheet using liquid paraffin;
- a lubricating layer a liquid film in which solid particles are not dispersed
- the present inventor explains why the lubricity with respect to the fluid substance is further improved.
- Etc. are estimated as follows. That is, when a fluid substance (for example, the contents of a packaging material such as a container) falls in contact with the lubricating layer 3, the solid particles 7 exhibit a roller action and fall while rolling together with the fluid substance. For this reason, it is considered that the lubricity is further improved as compared with the case where a film (liquid layer) is simply formed by the liquid 5.
- Experimental Example 19 in which the layer of the liquid 5 (edible oil) was formed in a state where the solid particles 7 were adhered to the surface of the substrate 1 was less slippery with respect to the fluid substance than Experimental Example 1 described above. .
- the solid particles 7 since the solid particles 7 are fixed to the surface of the base material 1, the solid particles 7 do not exhibit an action as a roller.
- the lubricating layer 3 is formed on the surface of the substrate 1 using the coating composition of the present invention as described above, particularly when used as a container such as a bottle,
- the adhesion remaining at the bottom of the contents can be remarkably suppressed.
- the adhesion remaining property to the bottom is evaluated.
- the present invention it can be seen from this test result that in the bottle in which the solid particles are dispersed in the lubrication layer formed on the inner surface, the remaining sticking of mayonnaise-like food is remarkably suppressed.
- the solid particles 7 are continuously held on the surface of the base material 1 while the liquid 5 is held even after the contents are slid down.
- the present inventors consider that the liquid 5 held on the surface of the solid particles 7 exists at the bottom of the container. That is, when only a lubricating layer (simple liquid film) in which fine solid particles 7 are not present is formed, when the container is inverted or inclined, the surface of the substrate 1 is caused by the liquid 5 due to its own weight or the like. (Since the inner surface of the container), as a result, the slidability with respect to the contents at the bottom is greatly reduced.
- the liquid 5 is solid.
- the particles 7 are firmly held on the surface of the substrate 1 (inner surface of the container), and as a result, the sliding can be stably exhibited even at the bottom.
- the container which is the most preferable form of the structure in which the lubricating layer 3 made of the coating composition of the present invention is formed on the surface of the substrate 1
- the liquid 5 and the solid particles 7 of the part flow down together with the contents and are discharged, but when the container is returned to the upright state, the solid particles 7 holding the liquid 5 on the surface are less likely to slide down than the contents. Therefore, it stays on the bottom side of the container, and when the next contents are discharged, excellent sliding properties are exhibited again.
- the type of liquid (liquid 5 in the lubricating layer 3) used as a dispersion medium in the coating composition and solid particles (lubricating layer) dispersed in the coating composition 3 is a container in which viscous contents that have been difficult to discharge smoothly are stored by selecting an appropriate type of solid particles 7) and forming a lubricating layer 3 on the inner surface thereof. And is preferably used.
- the base material 1 is most suitably used as a container for storing contents having a viscosity (25 ° C.) of 1260 mPa ⁇ s or more such as mayonnaise, ketchup, and various dressings.
- the surface of the base material 1 on which the lubricating layer 3 is formed using the coating composition of the present invention can hold the liquid 5 and the solid particles 7 that are constituents of the lubricating layer 3.
- the base material 1 having such a surface is preferably used as a packaging material or a pipe for flowing a viscous fluid substance, and the packaging material includes a synthetic resin container, a glass container, and the like.
- the inner surface conventionally used for accommodating viscous contents is a container made of synthetic resin or glass,
- the material forming the surface of the substrate 1 is most preferably made of synthetic resin.
- a synthetic resin (hereinafter referred to as a base resin) suitable as a material for forming the surface of the substrate 1 may be any thermoplastic resin or thermosetting resin that can be molded. From the viewpoint that it is easy and can stably hold the oily liquid (liquid 5) and the solid particles 7 holding the oily liquid on the surface, a thermoplastic resin is preferable. As such a thermoplastic resin, the following can be illustrated, for example.
- Olefin resins such as low density polyethylene, high density polyethylene, polypropylene, poly 1-butene, poly 4-methyl-1-pentene or ⁇ -olefins such as ethylene, propylene, 1-butene, 4-methyl-1-pentene Random or block copolymers, cyclic olefin copolymers, etc .; Ethylene / vinyl copolymers, such as ethylene / vinyl acetate copolymer, ethylene / vinyl alcohol copolymer, ethylene / vinyl chloride copolymer, etc .; Styrenic resin such as polystyrene, acrylonitrile / styrene copolymer, ABS, ⁇ -methylstyrene / styrene copolymer, etc .; Vinyl resins such as polyvinyl chloride, polyvinylidene chloride, vinyl chloride / vinylidene chloride copolymers, polymethyl acrylate, polymethyl methacryl
- the olefin resin has a lower glass transition point (Tg) and higher molecular mobility at room temperature than a polyester resin such as PET, and therefore is based on the lubricating layer 3 containing an oily liquid such as edible oil.
- Tg glass transition point
- the lubricating layer 3 containing an oily liquid such as edible oil.
- the olefin resin is highly flexible and is also used for a squeeze bottle (squeeze bottle) by direct blow molding.
- a structure in which the lubricating layer 3 is formed on the surface of the base material 1 is used.
- Olefin resins are also suitable from the viewpoint of being applied to such containers.
- the base material 1 having the surface structure described above can form the lubricating layer 3 on the surface using the coating composition of the present invention
- the form thereof is not limited, and pipe shape, container shape, lid material shape, etc.
- Various forms according to the application can be taken.
- the base material 1 and the structure provided with the lubricating layer 3 on the surface thereof are suitably applied to packaging materials.
- the form of a synthetic resin container, a glass container or a metal container, or a lid It is suitably used in the form of a material or a pouring tool (spout).
- this base material 1 when this base material 1 is a container made of a synthetic resin, it may have a single-layer structure in which the entire container is formed of a synthetic resin that forms the inner surface. You may have the laminated structure of.
- the inner surface is formed of an olefin resin or a polyester resin, an oxygen barrier layer or an oxygen absorption layer is appropriately laminated as an intermediate layer through an adhesive resin layer, and further, the inner surface is formed.
- a structure in which the same kind of resin as the base resin (olefin resin or polyester resin) is laminated on the outer surface side can be employed.
- the oxygen barrier layer in such a multilayer structure is formed of, for example, an oxygen barrier resin such as ethylene-vinyl alcohol copolymer or polyamide. As long as the oxygen barrier property is not impaired, Other thermoplastic resins may be blended.
- the oxygen absorbing layer is a layer containing an oxidizing polymer and a transition metal catalyst, as described in JP-A No. 2002-240813, etc., and the oxidizing polymer is oxygenated by the action of the transition metal catalyst. As a result, the oxygen is absorbed and the permeation of oxygen is blocked.
- an oxidizable polymer and a transition metal catalyst are described in detail in the above-mentioned JP-A No.
- oxidizable polymer examples include Olefin resins having tertiary carbon atoms (eg, polypropylene, polybutene-1, etc., or copolymers thereof), thermoplastic polyesters or aliphatic polyamides; xylylene group-containing polyamide resins; ethylenically unsaturated group-containing polymers ( For example, a polymer derived from a polyene such as butadiene).
- the inorganic salt, organic acid salt, or complex salt of transition metals, such as iron, cobalt, and nickel are typical.
- Adhesive resins used for bonding the layers are known per se, for example, olefin resins graft-modified with carboxylic acids such as maleic acid, itaconic acid, fumaric acid or their anhydrides, amides, esters, etc .; An ethylene-acrylic acid copolymer; an ion-crosslinked olefin copolymer; an ethylene-vinyl acetate copolymer; and the like are used as the adhesive resin.
- the thickness of each layer described above may be set to an appropriate thickness according to the characteristics required for each layer.
- a ligide layer in which scraps such as burrs generated when the substrate 1 having a multilayer structure as described above is blended with a virgin resin such as an olefin resin as an inner layer.
- a virgin resin such as an olefin resin
- the outer surface can be formed of a polyester resin or an olefin resin.
- the shape of the container is not particularly limited, and may have a shape corresponding to the container material, such as a cup or cup shape, a bottle shape, a bag shape (pouch), a syringe shape, an acupoint shape, or a tray shape, and is stretch-molded. May be.
- the pre-molded body having the above-mentioned inner surface is molded by a method known per se, and this is post-processed such as affixing a film by heat sealing, vacuum molding such as plug assist molding, and blow molding.
- this is post-processed such as affixing a film by heat sealing, vacuum molding such as plug assist molding, and blow molding.
- FIG. 2 shows a direct blow bottle which is the most preferable form of the substrate 1 of the present invention. That is, in FIG. 2, this bottle generally indicated by 10 has a neck portion 11 provided with a screw thread, a trunk wall 15 connected to the neck portion 11 through a shoulder portion 13, and a bottom closing the lower end of the trunk wall 15. The wall 17 is provided, and the above-described liquid film is formed on the inner surface of the bottle 10 and is filled with, for example, a viscous content.
- the coating composition of the present invention used for forming the lubricating layer 3 provided on the surface of the substrate 1 has the liquid 5 in the lubricating layer 3 as a dispersion medium and the solid particles 7 in the lubricating layer 3 as dispersed particles. .
- the liquid 5 used as the dispersion medium an appropriate one is used according to the slippery object to be applied to the surface of the substrate 1 (for example, the contents of the packaging material).
- a liquid 5 is not removed after the coating composition is applied, and the applied layer becomes the lubricating layer 3 as it is. Therefore, naturally, a non-volatile liquid having a low vapor pressure under atmospheric pressure, For example, it must be a high-boiling 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, making it difficult to form the lubricating layer 3.
- the liquid 5 is a high boiling point liquid as described above, and is naturally not miscible with the flowable substance flowing on the surface 1, and further exhibits high wettability with respect to the surface 1.
- the contact angle (20 ° C.) with respect to the surface 1 is 45 ° or less and the viscosity (25 ° C.) is 100 mPa ⁇ s or less. It is. That is, regardless of whether the material of the surface of the substrate 1 is made of synthetic resin, glass, or metal, the liquid 5 that satisfies the physical properties as described above can be used.
- the lubricating effect is higher as the surface tension is significantly different from the material to be lubricated (for example, the contents of the container), which is suitable for the present invention. It is.
- Typical examples include synthetic paraffin, fluorinated liquid, fluorinated surfactant, silicone oil, fatty acid triglyceride, and various vegetable oils.
- Suitable vegetable oils 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 for
- the solid particles dispersed in the liquid 5 that is, the solid particles 7 in the lubricating layer 3 are not dissolved in the liquid 5 and can exist in a solid state.
- the particle diameter (median value of the particles) is 300 ⁇ m or less, particularly 100 ⁇ m. The following fine particles are preferable. If the particle diameter is too large, the roller characteristics due to rolling of the particles are not sufficiently exhibited, and the effect of improving the lubricity becomes insufficient.
- the particle size is desirably 5 ⁇ m or more.
- fusing point is 40 degreeC or more.
- the material of the solid particles 7 is not particularly limited, and may be formed of various organic materials and inorganic materials, but is used as a retention medium for the surface of the base material 1 and as a dispersion medium and is a lubricating layer.
- 3 is preferably organic particles rather than inorganic particles such as metal particles and metal oxides, from the viewpoint of good compatibility with the liquid 5 present in 3.
- olefin wax, rice wax, carnauba Wax, various celluloses, organic resin cured products (for example, cured products obtained by curing polyfunctional acrylic monomers), etc. are preferable, especially from the viewpoint that they can be used without limitation for applications such as food contents. Is preferred.
- the coating composition of the present invention when this is applied to the surface of the substrate 1, the applied layer becomes the lubricating layer 3 as it is, so the composition of the coating composition (the ratio of the amount of the liquid 5 to the solid particles 7) is It is set so as to correspond to the composition of the lubricating layer 3 that exhibits excellent lubricity.
- the solid particles 7 are contained in the coating composition in a ratio of 0.01 to 10 parts by weight, particularly 0.1 to 5 parts by weight, per 100 parts by weight of the liquid (liquid 5) used as a dispersion medium. It is desirable to be dispersed in When the lubricating layer 3 is formed with the coating composition containing the liquid 5 and the solid particles 7 in such an amount, the composition of the liquid 5 and the solid particles 7 is almost reflected in the lubricating layer 3 as it is. Not only the roller characteristics due to rolling are sufficiently exhibited, but also the liquid 5 is stably held by the solid particles 7 and an excellent sliding effect is exhibited. For example, when the amount of the solid particles 7 is larger than the above range, as shown in the model diagram of FIG. May be insufficient.
- the amount of the solid particles 7 is smaller than the above range (that is, the amount of the liquid 5 is large), as shown in the model diagram of FIG.
- the improvement effect may be insufficient.
- the base material 1 is a container
- the retention of the solid particles 7 at the bottom of the container tends to be unsatisfactory, and the disappearance of the solid particles 7 tends to occur. As a result, the contents adhere to the bottom of the container.
- the residual deterrent effect may be insufficient.
- the above-described coating composition of the present invention is easily prepared by mixing the liquid 5 (dispersion medium) and the solid particles 7 in the above-described quantitative ratio, and stirring to uniformly disperse the solid particles 7. Can do.
- Such a coating composition is usually applied to the surface of the substrate 1 in an amount of 1.0 to 6.2 mg / cm 2 , and thus the surface of the substrate 1 is provided with such an amount of the lubricating layer 3. Preferably it is formed. That is, if this amount is too small, it may be difficult to sufficiently exhibit the sliding improvement effect by the lubricating layer 3. If this amount is too large, the amount may become unstable due to the falling off of the lubricating layer 3 or the like. In addition, it tends to be difficult to exhibit the roller characteristics of the solid particles 7.
- the above-mentioned coating composition has a viscosity suitable for coating, and can be applied by means according to the form of the surface of the substrate 1, such as spraying, dipping, roller application, application by knife coater, etc. In particular, it can be easily applied regardless of the form of the surface of the substrate 1, and the application amount (corresponding to the amount of the lubricating layer 3) can be easily set in the above-mentioned amount range. Spray atomization is optimal.
- the lubricating layer 3 has a viscous flow with a viscosity (25 ° C.) of 100 mPa ⁇ s or more.
- a viscosity 25 ° C.
- the type of the liquid 5 or solid particles is appropriately selected, and the lubricating layer 3 is formed on the inner surface thereof, the content adhesion remaining prevention effect on the bottom portion is also exhibited.
- liquid film 3 is formed using the oily liquid described above, for example, mayonnaise, ketchup, aqueous paste, honey, various sauces, mustard, dressing, jam, chocolate syrup, milky lotion, It is most suitable as a filling bottle for viscous contents such as liquid detergents, shampoos and rinses.
- the present invention will be described in the following experimental examples.
- the container (base material 1), synovial fluid (liquid 5 which is a component of the lubricating layer 3), and contents used in each experimental example are as follows.
- Sheet material As the sheet material, a multilayer sheet having a width of 75 mm and a length of 50 mm cut out from a multilayer bottle described later, and a glass plate having a width of 75 mm and a length of 50 mm were provided.
- Inner layer Low density polyethylene resin (LDPE)
- Intermediate layer ethylene-vinyl alcohol copolymer (EVOH)
- Outer layer Low density polyethylene resin (LDPE)
- Adhesive layer between inner and outer layers and intermediate layer): acid-modified polyolefin
- Edible oil A Medium chain fatty acid added salad oil (viscosity 33 mPa ⁇ s (25 ° C), contact angle 18 °)
- Edible oil B Medium chain fatty acid-free salad oil (viscosity 80 mPa ⁇ s (25 ° C), contact angle 18 °)
- Solid particles Rice wax Cellulose In each experimental example, solid particles were mixed with the liquid (dispersion medium) shown in Table 1 or Table 2 and stirred to disperse solid particles having a prescribed particle size. Was prepared, and a prescribed coating amount was applied uniformly on the inner surface of the container sheet material and the inner surface of the bottle.
- Particle size of solid particles The particle size was determined by measuring the particle size distribution of a dispersion obtained by mixing 1% solid particles in edible oil A with a laser light diffraction scattering method using a particle size distribution analyzer (LA-300 manufactured by Horiba, Ltd.). The value was taken as the particle diameter.
- Contact angle The contact angle of the dispersion medium (Liquid 5) was 10 mg of edible oil used for the slide-off liquid with the inner surface of the container of the multilayer sheet of sheet material as the upper surface, 20 ° C., 50% RH, contact angle meter (Kyowa Interface Science Co., Ltd.) ) Measured with a Drop Master 700).
- the viscosity of the dispersion medium was measured by placing the B-type digital viscometer spindle and guard into the liquid placed in a beaker, rotating the spindle for 1 minute at 25 ° C. and a rotation speed of 10 times / minute.
- the evaluation method of slipperiness (slidability of a sheet material) and bottom part slipperiness (bottle) using the contents is as follows. ⁇ Evaluation of lubricity> After each coating solution was applied to the sheet material, it was held at an angle of 30 degrees (see FIG. 4), 6 mg of mayonnaise-like food was dropped, the time for moving 5 cm was measured, and evaluated according to the following criteria.
- a spray nozzle was inserted into the bottle to the bottom, and the coating liquid was applied to the entire side wall from the bottom of the bottle by pulling up while spraying the coating composition (coating liquid).
- a bottle with a liquid film in which solid particles are dispersed on the inner surface of the container is filled with 400 g of mayonnaise-like food as the contents, and the bottle mouth is heat sealed with aluminum foil and sealed with a cap. To obtain a filled bottle. The filled bottle filled with the contents was stored at 23 ° C. for 1 week.
- Content sliding rate (%) (Surface area where the contents slide down / Bottle body wall surface area) ⁇ 100 From the sliding rate of the contents calculated above, the slipperiness was evaluated according to the following criteria. ⁇ : Content sliding rate is 90% or more ⁇ : Content sliding rate is 50% or more and less than 90% ⁇ : Content sliding rate is less than 50%
- Example 1 to 6 Using a multilayer sheet as an inner surface forming material of the packaging material, a coating composition in which rice wax (particle diameter: 100 ⁇ m) is dispersed in edible oil A (dispersion medium) is applied in the ratio of solid particles in Table 1 and the coating amount. And the slipperiness was evaluated.
- rice wax particle diameter: 100 ⁇ m
- edible oil A dispersion medium
- Example 7 Coating composition with the ratio of solid particles in Table 1 and the coating amount in the same manner as in Experimental Example 1 except that a multilayer sheet was used as the inner surface forming material of the packaging material and the solid particles were changed to rice wax (particle diameter 50 ⁇ m). A thing was apply
- Example 8 The coating composition was determined in the same manner as in Experimental Example 1 except that a multilayer sheet was used as the inner surface forming material of the packaging material and the solid particles were changed to rice wax (particle diameter 250 ⁇ m). A thing was apply
- Example 9 The coating composition was applied in the same manner as in Experimental Example 1, except that a multilayer sheet was used as the inner surface forming material of the packaging material, and the slide-off liquid was changed to cooking oil B. The slipperiness was evaluated.
- Example 10 The coating composition was used in the same manner as in Experimental Example 1 except that a multilayer sheet was used as the inner surface forming material of the packaging material, and the solid particles were changed to cellulose (particle diameter 120 ⁇ m). Was applied and the sliding property was evaluated.
- Example 11 A glass plate was used as the inner surface forming material of the packaging material, and the coating composition was applied in the same manner as in Experimental Example 1 except that the coating composition was applied in the ratio of the solid particle amount and the coating amount in Table 1.
- Example 12 Using a multi-layer bottle as a packaging material, a coating composition in which rice wax (particle diameter: 100 ⁇ m) was dispersed in edible oil A was applied at the ratio of solid particles in Table 1 and the coating amount, and the bottom lubricity was evaluated. .
- Example 13 Using a multi-layer bottle as a packaging material, a coating composition in which rice wax (particle diameter: 50 ⁇ m) was dispersed in edible oil A was applied at the ratio of solid particle amount and application amount shown in Table 1, and the bottom lubricity was evaluated. .
- Example 14 Using a multi-layer bottle as a packaging material, a coating composition in which rice wax (particle diameter 250 ⁇ m) was dispersed in edible oil A was applied at the ratio of solid particle amount and application amount shown in Table 1, and the bottom lubricity was evaluated. .
- Example 15 to 16 Using a multilayer sheet as an inner surface forming material of the packaging material, a coating composition in which rice wax (particle diameter: 100 ⁇ m) is dispersed in edible oil A is applied in the ratio of solid particle amount and application amount shown in Table 2, and lubricity Evaluated.
- Example 17 Using a multilayer sheet as an inner surface forming material of the packaging material, a coating composition in which rice wax (particle diameter 350 ⁇ m) is dispersed in edible oil A is applied in the ratio of solid particle amount and application amount shown in Table 2, and lubricity Evaluated.
- Example 18 A multilayer sheet was used as the inner surface forming material of the packaging material, and edible oil A was applied at the coating amount shown in Table 2 to evaluate the lubricity.
- Example 19 A multilayer sheet was used as the inner surface forming material of the packaging material, and 2.5 g of rice wax was applied, and then edible oil A was applied at the application amount shown in Table 2 to evaluate the lubricity.
- Example 20 A multilayer sheet was used as the inner surface forming material of the packaging material, and the lubricity was evaluated without applying the coating composition.
- Example 22 A multilayer bottle was used as a packaging material, and the bottom slip was evaluated without applying the coating composition.
- the lubricity of the contents is improved by forming a lubricating layer containing liquid and solid particles on the inner surface of the sheet material and the bottle, and the contents are excellent in lubricity.
- the ratio of the solid particles in the coating composition is high, the residual ratio of the lubricating layer is high.
- the ratio of the solid particles in the coating composition is too high, the solid particles may agglomerate to inhibit sliding of the contents or to be mixed into the contents.
- the ratio (corresponding to the amount of solid particles per 100 g of liquid) is preferably 0.01 to 10%, more preferably 0.1 to 5%.
- base material 3 lubricating layer 5: liquid 7: solid particles 10: bottle 11: neck 13: shoulder 15: trunk wall
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Abstract
Description
かかる技術によれば、基材表面を形成する合成樹脂に滑剤などの添加剤を加える場合と比して、滑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。
しかしながら、かかる容器で発現する滑性は、液膜を設けた容器と比較すると、かなり低い。
さらに、上記のような流動性物質に対する滑性の向上は、容器ばかりでなく、蓋材にも求められているし、さらには、粘稠な流動性物質を流すためのパイプなどの部材にも滑性の向上が求められている。
本発明の他の目的は、容器や蓋等の包装材として使用される基材の表面に潤滑層を形成する方法を提供することにある。
(1)前記分散媒としての前記液体が、沸点が200℃以上の高沸点液体であって、前記基材表面に対する接触角(20℃)が45度以下であり且つ100mPa・s以下の粘度(25℃)を有していること、
(2)前記分散媒としての前記液体100質量部当り、0.01~20質量部の量で前記固体粒子が分散されていること、
(3)前記固体粒子が、5~300μmの粒子径を有していること、
(4)前記固体粒子が、有機粒子であること、
が好ましい。
かかる方法においては、前記基材として、流動性物質が収容される包装材を使用し、前記コーティング組成物を、該容包装材の流動性物質が接触する面にスプレー噴霧することが望ましい。
本発明によれば、さらに、上記のコーティング組成物を前記基材の表面に塗布した流動性物質に対する滑性を向上するための潤滑層を有し、該潤滑層は、液体と固体粒子とから形成されている構造体が提供される。
かかるコーティング組成物においては、上記の分散媒である液体は、この組成物(懸濁液)に分散されている固体粒子と共に、形成される潤滑層の構成成分であり、加熱等により除去されるものではない。従って、基材表面に塗布することにより形成されたコーティング組成物の塗布層は、加熱等の後処理を行うことなく、そのまま潤滑層として機能するものであり、これは、本発明の大きな利点である。
従って、本発明のコーティング組成物は、上記のような粘稠な物質を内容物とする包装材(例えば容器や蓋)の内面(内容物が接触する面)に設けられる潤滑層を形成する手段として好適に使用される。
即ち、図1を参照して、本発明のコーティング組成物を、流動性物質と接触する基材1の表面1上に塗布することにより形成される潤滑層3は、液体5と固体粒子7とを含んでおり、液体3は、コーティング組成物の分散媒として使用されたものであり、固体粒子7は、コーティング組成物中の分散粒子として使用されたものである。
かかる図から理解されるように、コーティング組成物の固体粒子7の分散構造が、そのまま、潤滑層3に反映されており、このような潤滑層3は、表面1上を流れる流動性物質と直接接することとなり、かかる流動性物質に対して優れた滑性を示す。即ち、表面1上を直接流動性物質が流れる場合に比して、その滑性は大きく向上している。
例えば、後述する実験例に示されているように、ポリプロピレンシートの表面に、流動パラフィンを用いて潤滑層(固体粒子が分散されていない液膜)を形成した実験例18(比較例)と、流動パラフィン(液体2)にライスワックス(固体粒子7)が分散されているコーティング組成物を用いて潤滑層を形成した実験例1(本発明例)について、マヨネーズ様食品の落下速度を比較すると(詳細な条件は実施例参照)、実験例1の方が、マヨネーズ様食品の落下速度の方が、さらに速くなっている。
即ち、潤滑層3に接しながら流動性物質(例えば、容器等の包装材の内容物)が落下する際、この固体粒子7がコロの作用を示し、流動性物質と共に転がりながら落下していく。このため、単に液体5による膜(液体層)を形成した場合よりもさらに滑性が向上するものと考えられる。実際、基材1の表面に固体粒子7が付着している状態で、液体5(食用油)の層を形成した実験例19は、前述した実験例1よりも流動性物質に対する滑性が低い。この場合には、固体粒子7は、基材1の表面に固定されているため、コロとしての作用を示さないからである。
例えば、後述する実験例には、内容物としてマヨネーズ様食品(粘度:1260mPa・s@25℃)を充填したボトルの内面に潤滑層3を形成したとき、その底部への付着残存性が評価されているが、本発明に従って、内面に形成されている潤滑層中に固体粒子が分散されているボトルでは、マヨネーズ様食品の付着残存が著しく抑制されていることが、この試験結果から判る。
図1を参照して、本発明のコーティング組成物を用いて潤滑層3を形成する基材1の表面は、潤滑層3の構成成分である液体5と固体粒子7とを保持し得ると同時に、用途に応じた成形が可能である限り、特に制限されず、合成樹脂製であってもよいし、ガラス製でもよく、さらには金属製であってもよい。即ち、このような表面を有する基材1は、包装材や粘稠な流動性物質を流すためのパイプなどとして好適に使用されるが、特に包装材は、合成樹脂製容器、ガラス製容器及び金属製容器の何れであってもよいし、また、容器の口部のシールに用いる合成樹脂製の蓋や、容器内容物の注出に使用される合成樹脂製の注出具であってもよい。
但し、特に容器として使用する場合において、粘稠な内容物に対する排出性を高めるという観点からは、粘稠な内容物の収容に従来から使用されている内面が合成樹脂製或いはガラス製の容器、特に内面が合成樹脂製の容器に本発明を適用することが好ましく、従って、基材1の表面(例えば包装材の内面)を形成する素材は、合成樹脂製であることが最も好適である。
このような熱可塑性樹脂としては、例えば、以下のものを例示することができる。
オレフィン系樹脂、例えば、低密度ポリエチレン、高密度ポリエチレン、ポリプロピレン、ポリ1-ブテン、ポリ4-メチル-1-ペンテンあるいはエチレン、プロピレン、1-ブテン、4-メチル-1-ペンテン等のα-オレフィン同士のランダムあるいはブロック共重合体、環状オレフィン共重合体など;
エチレン・ビニル系共重合体、例えば、エチレン・酢酸ビニル共重合体、エチレン・ビニルアルコール共重合体、エチレン・塩化ビニル共重合体等;
スチレン系樹脂、例えば、ポリスチレン、アクリロニトリル・スチレン共重合体、ABS、α-メチルスチレン・スチレン共重合体等;
ビニル系樹脂、例えば、ポリ塩化ビニル、ポリ塩化ビニリデン、塩化ビニル・塩化ビニリデン共重合体、ポリアクリル酸メチル、ポリメタクリル酸メチル等;
ポリアミド樹脂、例えば、ナイロン6、ナイロン6-6、ナイロン6-10、ナイロン11、ナイロン12等;
ポリエステル樹脂、例えば、ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート、ポリエチレンナフタレート、及びこれらの共重合ポリエステル等;
ポリカーボネート樹脂;
ポリフエニレンオキサイド樹脂;
生分解性樹脂、例えば、ポリ乳酸など;
勿論、成形性が損なわれない限り、これらの熱可塑性樹脂のブレンド物を、下地樹脂として使用することもできる。
即ち、オレフィン系樹脂は、PET等のポリエステル樹脂と比較してガラス転移点(Tg)が低く、室温下での分子の運動性が高いため、食用油などの油性液体を含む潤滑層3を基材1の表面に形成する場合には、このような油性液体の一部が内部に浸透し、この結果、潤滑層3(液体5及び液体5を表面に保持した固形粒子7)を安定に保持するという点で適している。
さらに、オレフィン系樹脂は、可撓性が高く、ダイレクトブロー成形による絞り出し容器(スクイズボトル)の用途にも使用されており、潤滑層3が基材1の表面に形成されている構造体をこのような容器に適用するという観点からもオレフィン系樹脂は適している。
特に、基材1、および、その表面に潤滑層3を備えた構造体は、包装材の用途に好適に適用され、例えば、合成樹脂製容器、ガラス製容器或いは金属製容器の形態や、蓋材や注出具(スパウト)などの形態で好適に使用される。
特に内面が、オレフィン系樹脂或いはポリエステル樹脂で形成されている場合には、中間層として、適宜接着剤樹脂の層を介して、酸素バリア層や酸素吸収層を積層し、さらに、内面を形成する下地樹脂(オレフィン系樹脂或いはポリエステル樹脂)と同種の樹脂が外面側に積層した構造を採用することができる。
また、酸素吸収層は、特開2002-240813号等に記載されているように、酸化性重合体及び遷移金属系触媒を含む層であり、遷移金属系触媒の作用により酸化性重合体が酸素による酸化を受け、これにより、酸素を吸収して酸素の透過を遮断する。このような酸化性重合体及び遷移金属系触媒は、上記の特開2002-240813号等に詳細に説明されているので、その詳細は省略するが、酸化性重合体の代表的な例は、第3級炭素原子を有するオレフィン系樹脂(例えばポリプロピレンやポリブテン-1等、或いはこれらの共重合体)、熱可塑性ポリエステル若しくは脂肪族ポリアミド;キシリレン基含有ポリアミド樹脂;エチレン系不飽和基含有重合体(例えばブタジエン等のポリエンから誘導される重合体);などである。また、遷移金属系触媒としては、鉄、コバルト、ニッケル等の遷移金属の無機塩、有機酸塩或いは錯塩が代表的である。
上述した各層の厚みは、各層に要求される特性に応じて、適宜の厚みに設定されればよい。
即ち、図2において、全体として10で示されるこのボトルは、螺条を備えた首部11、肩部13を介して首部11に連なる胴部壁15及び胴部壁15の下端を閉じている底壁17を有しており、このようなボトル10の内面に前述した液膜が形成され、例えば粘稠な内容物が充填されることとなる。
基材1表面上に設けられる潤滑層3の形成に使用される本発明のコーティング組成物は、潤滑層3中の液体5を分散媒とし且つ潤滑層3中の固体粒子7を分散粒子として有する。
かかる液体5は、このコーティング組成物を塗布した後に除去されるものではなく、塗布層がそのまま潤滑層3となるものであるため、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、潤滑層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、水や水を含む親水性物質に対する滑性を高めるには、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液体5として用いるのが良く、流動パラフィン、合成パラフィン、フッ素系液体、フッ素系界面活性剤、シリコーンオイル、脂肪酸トリグリセライド、各種の植物油などが代表的である。植物油としては、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。
また、この固体粒子5は、潤滑層3の滑性を発揮させる構造体の使用時に固体状態を維持することが必要であるため、融点は40℃以上であることが望ましい。
例えば、固体粒子7の量が上記範囲よりも多いと、図3(a)のモデル図に示されているように、固体粒子7が凝集して存在する傾向が高くなり、滑性向上効果が不十分となるおそれがある。
また、固体粒子7の量が上記範囲よりも少ないと(即ち、液体5の量が多い)、図3(b)のモデル図に示されているように、固体粒子7のコロ特性による滑性向上効果が不十分となってしまうおそれがある。さらに、基材1が容器である場合には、容器底部での固体粒子7の保持が不満足となり、固体粒子7の消失が生じ易くなる傾向があり、この結果、容器底部での内容物の付着残存抑止効果も不十分となってしまうおそれがある。
特に、この構造体を容器として使用し、液体5や固体粒子の種類を適宜選択して、その内面に潤滑層3を形成したものは、底部への内容物付着残存防止効果をも示す。特に前述した油性液体を用いて液膜3が形成されている場合には、例えば、マヨネーズ、ケチャップ、水性糊、蜂蜜、各種ソース類、マスタード、ドレッシング、ジャム、チョコレートシロップ、乳液等の化粧液、液体洗剤、シャンプー、リンス等の粘稠な内容物の充填ボトルとして最も好適である。
各実験例にて使用した容器(基材1)、滑液(潤滑層3の構成成分である液体5)、内容物は次のとおりである。
(1)シート材
シート材として、後述する多層ボトルから切り出した幅75mm、長さ50mmの多層シートと、幅75mm、長さ50mmのガラス板を供した。
(2)ボトル
下記の層構成を有する多層構造を有し、且つ内容量400gの多層ダイレクトブローボトルを供した。
内層:低密度ポリエチレン樹脂(LDPE)
中間層:エチレン-ビニルアルコール共重合体(EVOH)
外層:低密度ポリエチレン樹脂(LDPE)
接着層(内外層と中間層との間):酸変性ポリオレフィン
(1)潤滑層形成用液体(分散媒)
食用油A:
中鎖脂肪酸添加サラダ油
(粘度33mPa・s(25℃)・接触角18度)
食用油B:
中鎖脂肪酸添加なしサラダ油
(粘度80mPa・s(25℃)・接触角18度)
(2)固体粒子
ライスワックス
セルロース
各実験例において、表1或いは表2に示した上記液体(分散媒)に固体粒子を混ぜ合わせ、撹拌し、規定の粒子径の固体粒子が分散したコーティング組成物を調製し、容器のシート材、ボトルの内面に規定の塗布量を、容器内面に均一となるように塗布した。
固体粒子の粒子径;
粒子径は、食用油Aに固体粒子1%を混ぜた分散液を、レーザ光回折散乱法で粒度分布を粒度分布測定装置((株)堀場製作所製LA―300)にて測定し、粒子中央値を粒子径とした。
接触角;
分散媒(液体5)の接触角は、シート材の多層シートの容器内面を上面にして滑落液に使用した食用油を10mg落とし、20℃、50%RH、接触角計(協和界面科学(株)社DropMaster700)にて測定した。
粘度;
分散媒の粘度は、ビーカーに入れた液体に、B型デジタル粘度計のスピンドルとガードを入れ、25℃、回転数10回/分でスピンドルを1分間回転させ、粘度測定を行った。
卵1個(50g)と酢15ccと塩2.5ccを混ぜた後、さらに食用油150ccを混ぜ合わせて、実験用のマヨネーズ様食品を作成した。各実施例、比較例では、必要量の内容物を作成して使用した。
<滑性の評価>
シート材に各塗布液を塗布した後、30度の角度に保持し(図4参照)、6mgのマヨネーズ様食品を落下させ、5cmを移動する時間を測定し、次の基準で評価した。
◎:14秒未満で移動
○:14秒以上18秒未満で移動
△:18秒以上で移動
×:60秒以上落下しない
<容器の底部滑性の評価>
ボトル内に、噴霧ノズルを底まで挿入し、コーティング組成物(塗布液)を噴霧しながら引き上げることによりボトル底部から側壁全面に塗布液を塗布した。この容器内面に固体粒子を分散させた液膜が形成されているボトル内に、内容物であるマヨネーズ様食品を常法で400g充填し、ボトル口部をアルミ箔でヒートシールし、キャップで密封して充填ボトルを得た。
内容物が充填された充填ボトルを23℃で1週間保管した。1週間保管されたボトルについて、胴部を押し、ボトル口部を通して内容物を最後まで搾り出した後、このボトル内に空気を入れ形状を復元させた。
次いで、このボトルを倒立(口部を下側)にして1時間保管した後のボトル胴部壁の内容物滑落程度(胴部壁に内容物が付着していない程度)を測定し、次の式で内容物滑落率を計算した。
内容物滑落率(%)
=(内容物が滑落している表面積/ボトル胴部壁表面積)×100
上記で計算された内容物滑落率から、滑性を次の基準で評価した。
○:内容物滑落率が90%以上
△:内容物滑落率が50%以上で90%未満
×:内容物滑落率が50%未満
包装材の内面形成材として多層シートを用い、食用油A(分散媒)にライスワックス(粒子径100μm)を分散させたコーティング組成物を、表1中の固体粒子量の比率、塗布量で塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、固体粒子をライスワックス(粒子径50μm)に変更した以外は実験例1と同様にして、表1中の固体粒子量の比率、塗布量でコーティング組成物を塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、固体粒子をライスワックス(粒子径250μm)に変更した以外は実験例1と同様にして、表1中の固体粒子量の比率、塗布量でコーティング組成物を塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、滑落液を食用油Bに変更した以外は実験例1と同様にして、表1中の固体粒子量の比率、塗布量でコーティング組成物を塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、固体粒子をセルロース(粒子径120μm)に変更した以外は実験例1と同様にして、表1中の固体粒子量の比率、塗布量でコーティング組成物を塗布し、滑落性を評価した。
包装材の内面形成材としてガラス板を用い、それ以外は実験例1と同様にして、表1中の固体粒子量の比率、塗布量でコーティング組成物を塗布し、滑性を評価した。
包装材として多層ボトルを用い、食用油Aにライスワックス(粒子径100μm)を分散させたコーティング組成物を、表1中の固体粒子量の比率、塗布量で塗布し、底部滑性を評価した。
包装材として多層ボトルを用い、食用油Aにライスワックス(粒子径50μm)を分散させたコーティング組成物を、表1中の固体粒子量の比率、塗布量で塗布し、底部滑性を評価した。
包装材として多層ボトルを用い、食用油Aにライスワックス(粒子径250μm)を分散させたコーティング組成物を、表1中の固体粒子量の比率、塗布量で塗布し、底部滑性を評価した。
包装材の内面形成材として多層シートを用い、食用油Aにライスワックス(粒子径100μm)を分散させたコーティング組成物を、表2中の固体粒子量の比率、塗布量で塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、食用油Aにライスワックス(粒子径350μm)を分散させたコーティング組成物を、表2中の固体粒子量の比率、塗布量で塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、食用油Aを表2中の塗布量で塗布し、滑性を評価した。
包装材の内面形成材として多層シートを用い、ライスワックスを2.5g塗布後、食用油Aを表2中の塗布量で塗布して滑性を評価した。
包装材の内面形成材として多層シートを用い、コーティング組成物を塗布せずに滑性を評価した。
包装材として多層ボトルを用い、食用油Aを塗布して底部滑性を評価した。
包装材として多層ボトルを用い、コーティング組成物を塗布せずに底部滑性を評価した。
尚、表1,2において、EX.は実験例の略である。
前記実験例の結果を踏まえ、表3に示す量で固体粒子(ライスワックス)と分散媒(食用油)を含むコーティング組成物を0.6ccガラス材(プレパラート)に塗布し、全体に馴染ませ垂直に30秒維持し、水平に戻した時の塗布液の面積当たりの残存割合(%)を測定した。結果を表3に示す。
尚、表中に示されていないがコーティング組成物中の固体粒子の比率を高くし過ぎると、前記固体粒子が凝集して内容物の滑落を阻害、または内容物に混入する恐れがあり、その比率(液体100g当りの固体粒子量に相当)は0.01~10%が好ましく、特に0.1~5%がより好ましい。
3:潤滑層
5:液体
7:固体粒子
10:ボトル
11:首部
13:肩部
15:胴部壁
Claims (8)
- 所定形状に成形されている基材の表面に、流動性物質に対する滑性を向上させる潤滑層を形成するために使用されるコーティング組成物であって、該潤滑層の構成成分としての液体を分散媒として含み、該分散媒中に、該潤滑層の構成成分としての固体粒子が分散されていることを特徴とするコーティング組成物。
- 前記分散媒としての前記液体が、沸点が200℃以上の高沸点液体であって、前記基材表面に対する接触角(20℃)が45度以下であり且つ100mPa・s以下の粘度(25℃)を有している請求項1に記載のコーティング組成物。
- 前記分散媒としての前記液体100質量部当り、0.01~20質量部の量で前記固体粒子が分散されている請求項2に記載のコーティング組成物。
- 前記固体粒子が、5~300μmの粒子径を有している請求項1に記載のコーティング組成物。
- 前記固体粒子が、有機粒子である請求項4に記載のコーティング組成物。
- 請求項1に記載のコーティング組成物を、1.0~6.2mg/cm2の量で前記基材表面にスプレー噴霧することにより、流動性物質に対する滑性を向上させる潤滑層を該基材表面に形成する方法。
- 前記基材として、流動性物質が収容される包装材を使用し、前記コーティング組成物を、該容包装材の流動性物質が接触する面にスプレー噴霧する請求項6に記載の方法。
- 請求項1に記載のコーティング組成物を前記基材の表面に塗布した流動性物質に対する滑性を向上するための潤滑層を有し、該潤滑層は、液体と固体粒子とから形成されている構造体。
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- 2015-04-20 EP EP15809434.2A patent/EP3159165B1/en active Active
- 2015-04-20 KR KR1020177000385A patent/KR101909978B1/ko active IP Right Grant
- 2015-04-20 CN CN201580033312.5A patent/CN106470840B/zh active Active
- 2015-04-20 WO PCT/JP2015/062018 patent/WO2015194251A1/ja active Application Filing
- 2015-04-20 JP JP2016529136A patent/JP6593332B2/ja active Active
- 2015-04-20 US US15/319,446 patent/US20170321071A1/en not_active Abandoned
- 2015-06-18 JP JP2016529503A patent/JP6767608B2/ja active Active
- 2015-06-18 US US15/320,124 patent/US10131804B2/en active Active
- 2015-06-18 JP JP2016529502A patent/JP6589863B2/ja active Active
- 2015-06-18 KR KR1020177000386A patent/KR101953749B1/ko active IP Right Grant
- 2015-06-18 CN CN201580033367.6A patent/CN106471075B/zh active Active
- 2015-06-18 WO PCT/JP2015/067575 patent/WO2015194625A1/ja active Application Filing
- 2015-06-18 EP EP15809491.2A patent/EP3159385B1/en active Active
- 2015-06-18 WO PCT/JP2015/067576 patent/WO2015194626A1/ja active Application Filing
- 2015-06-18 US US15/320,028 patent/US20170190142A1/en not_active Abandoned
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JPWO2015194251A1 (ja) * | 2014-06-20 | 2017-06-29 | 東洋製罐株式会社 | 表面に液膜が形成されている構造体及び液膜形成用コーティング液 |
AU2016252824B2 (en) * | 2015-04-24 | 2019-03-07 | Toyo Seikan Co., Ltd. | Structure having solid particles distributed on the surface thereof |
JP2016203527A (ja) * | 2015-04-24 | 2016-12-08 | 東洋製罐株式会社 | 表面に固体粒子が分布している構造体 |
US20180134004A1 (en) * | 2015-04-24 | 2018-05-17 | Toyo Seikan Co., Ltd. | Structure having solid particles distributed on the surfaces thereof |
EP3287267A4 (en) * | 2015-04-24 | 2018-12-19 | Toyo Seikan Co., Ltd. | Structure with solid particles distributed on surface |
AU2016252826B2 (en) * | 2015-04-24 | 2019-01-31 | Toyo Seikan Co., Ltd. | Structure having externally added regions on the surface thereof |
WO2016170882A1 (ja) * | 2015-04-24 | 2016-10-27 | 東洋製罐株式会社 | 表面に固体粒子が分布している構造体 |
US10596781B2 (en) | 2015-04-24 | 2020-03-24 | Toyo Seikan Co., Ltd. | Structure having solid particles distributed on the surfaces thereof |
US11820914B2 (en) | 2017-03-02 | 2023-11-21 | LiquiGlide Inc. | Systems and methods for creating durable lubricious surfaces via interfacial modification |
JP2019156449A (ja) * | 2018-03-13 | 2019-09-19 | 東洋製罐株式会社 | 粘稠物質用容器 |
JP7149084B2 (ja) | 2018-03-13 | 2022-10-06 | 東洋製罐株式会社 | 粘稠物質用容器 |
JP2019171663A (ja) * | 2018-03-28 | 2019-10-10 | 東洋製罐グループホールディングス株式会社 | 潤滑層形成能を有する表面を備えたフィルム |
JP7102853B2 (ja) | 2018-03-28 | 2022-07-20 | 東洋製罐グループホールディングス株式会社 | 潤滑層形成能を有する表面を備えたフィルム |
Also Published As
Publication number | Publication date |
---|---|
US10131804B2 (en) | 2018-11-20 |
EP3159385A4 (en) | 2017-12-20 |
EP3159165B1 (en) | 2020-10-07 |
JPWO2015194626A1 (ja) | 2017-05-25 |
JPWO2015194625A1 (ja) | 2017-04-20 |
EP3159165A4 (en) | 2017-12-20 |
CN106471075B (zh) | 2019-07-19 |
EP3159165A1 (en) | 2017-04-26 |
EP3159385A1 (en) | 2017-04-26 |
US20170321071A1 (en) | 2017-11-09 |
WO2015194625A1 (ja) | 2015-12-23 |
JP6767608B2 (ja) | 2020-10-14 |
WO2015194251A1 (ja) | 2015-12-23 |
CN106470840A (zh) | 2017-03-01 |
KR101909978B1 (ko) | 2018-10-19 |
EP3159385B1 (en) | 2021-01-06 |
US20170130155A1 (en) | 2017-05-11 |
KR101953749B1 (ko) | 2019-03-04 |
JP6589863B2 (ja) | 2019-10-16 |
US20170190142A1 (en) | 2017-07-06 |
JP6593332B2 (ja) | 2019-10-23 |
KR20170016452A (ko) | 2017-02-13 |
JPWO2015194251A1 (ja) | 2017-06-29 |
KR20170016453A (ko) | 2017-02-13 |
CN106471075A (zh) | 2017-03-01 |
CN106470840B (zh) | 2018-11-16 |
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