WO2015194625A1 - 表面に潤滑層が形成されている構造体 - Google Patents
表面に潤滑層が形成されている構造体 Download PDFInfo
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- WO2015194625A1 WO2015194625A1 PCT/JP2015/067575 JP2015067575W WO2015194625A1 WO 2015194625 A1 WO2015194625 A1 WO 2015194625A1 JP 2015067575 W JP2015067575 W JP 2015067575W WO 2015194625 A1 WO2015194625 A1 WO 2015194625A1
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- liquid
- lubricating layer
- solid particles
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- C—CHEMISTRY; METALLURGY
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- 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
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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
- 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
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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
- 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
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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
- 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
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- 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 structure having a lubricating layer formed of a liquid on the surface, and more particularly to a structure in which the lubricity improving effect on a fluid substance is enhanced by the lubricating layer. .
- 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 structure having a lubricating layer on the surface and having improved lubricity with respect to a fluid material, particularly a viscous fluid material, by the lubricating layer.
- Another object of the present invention is to provide a structure that is more slidable with respect to the contents and that is suitably used as a packaging material for containers and lids.
- Still another object of the present invention is to provide a container having improved lubricity to the contents to a level at which the sticking contents of the viscous contents at the bottom are effectively suppressed.
- the present invention includes a base material molded into a predetermined shape, and a lubricating layer for improving the lubricity with respect to the fluid substance formed on the surface of the base material, the lubricating layer comprising a liquid and A structure characterized in that it is formed from solid particles is provided.
- the liquid contained in the lubricating layer has a contact angle (20 ° C.) with respect to the surface of the base material supporting the lubricating layer of 45 ° or less and a viscosity (25 ° C.) of 100 mPa ⁇ s or less.
- the solid particles are organic particles
- the solid particles are present in the lubricating layer in an amount of 0.01 to 10 parts by mass per 100 parts by mass of the liquid in the lubricating layer
- the lubricating layer is formed on the substrate surface in an amount of 1.0 to 6.2 mg / cm 2 ;
- the base material surface is made of synthetic resin
- the substrate surface is made of glass. Is preferred.
- the packaging material is used for accommodating a fluid content having a viscosity (25 ° C.) of 1260 mPa ⁇ s or more, (9) the packaging material is a container; Is preferred.
- a lubricating layer 3 is formed on the surface of a substrate 1 that comes into contact with a fluid substance, and this lubricating layer 3 includes a liquid 5 and solid particles 7 (for example, it includes two components of fine particles having a particle diameter of 300 ⁇ m or less. That is, the fluid substance flowing on the surface of the substrate 1 comes into contact with such a lubricating layer 3, thereby greatly improving the lubricity with respect to the fluid substance. It is already known that the slipperiness with respect to the contents is improved by forming a liquid layer on the inner surface of a packaging material such as a container.
- the viscous contents are discharged from a packaging material (for example, a container) in which such a liquid layer is formed on the inner surface
- the contents are discharged from the packaging material in a 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 of the structure of the present invention includes two components of the liquid 5 and the solid particles 7, thereby comparing with the case where a liquid-only layer is formed, The lubricity with respect to the flowable substance (for example, the container contents) is further enhanced.
- an experimental example 18 in which a liquid layer of liquid paraffin (not containing solid particles) is formed on the surface of a polypropylene sheet
- liquid paraffin and fine Experiment 1 in which a lubricating layer containing solid particles (rice wax) is formed on a polypropylene sheet is compared with the drop speed of mayonnaise-like food (see the examples for detailed conditions).
- the fall speed of the mayonnaise-like food is even faster. That is, both the liquid 5 (liquid paraffin) and the solid particles 7 (rice wax) improve the lubricity with respect to the fluid substance.
- the liquid 5 in the lubricating layer 3 is stably held on the surface of the substrate 1, and the solid particles 7 are also stably held on the surface of the substrate 1 by the liquid 5.
- the effect of improving the slipperiness of both is synergistically enhanced, and the remarkably excellent slipperiness is exhibited.
- the structure of the present invention is used as a container such as a bottle, it is possible to remarkably suppress adhesion and adhesion at the bottom of the content, in addition to the sliding property to the content.
- the adhesion remaining property to the bottom is evaluated, but according to the present invention. From this test result, it can be seen that in the bottle in which the lubrication layer 3 containing the liquid 5 and the solid particles 7 is formed on the inner surface, the remaining adherence of mayonnaise-like food is remarkably suppressed.
- the container which is the most preferable form of the structure of the present invention
- some liquid 5 and solid particles 7 flow down together with the contents and are discharged.
- the solid particles 7 holding the liquid 5 on the surface are less likely to slide down than the contents, and therefore remain on the bottom side of the container. It will exhibit excellent sliding properties again.
- a viscous content that has been difficult to be smoothly discharged can be obtained by appropriately selecting the type of liquid 5 and the type of solid particles 7. It is suitably used as a container to be accommodated.
- the structure of the present invention 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, various dressings and the like.
- the lubricating layer 3 provided on the surface of the substrate 1 uses a coating liquid in which solid particles 7 are dispersed in the liquid 5, and this coating liquid is used. It can be easily formed by coating the surface of the substrate 1 by spraying or the like.
- the model figure which shows the state of the lubricating layer formed in the surface of the structure of this invention.
- the model figure which shows the state of the solid particle which exists in a lubricating layer.
- the figure which shows the form of the direct blow bottle which is a suitable form of the structure of this invention.
- a base material 1 having a surface serving as a foundation for a lubricating layer 3 in a structure of the present invention can hold a liquid 5 and solid particles 7 contained in the lubricating layer 3 and at the same time a packaging material.
- a packaging material As long as it can be molded according to the form, it is not particularly limited, and may be made of synthetic resin, glass, or metal. That is, the structure of the present invention is suitably used as a packaging material or a pipe for flowing a viscous fluid substance, and in particular, the packaging material is a synthetic resin container, a glass container, or a metal container.
- the inner surface conventionally used for accommodating viscous contents is a container made of synthetic resin or glass,
- the material forming the inner surface of the packaging material is most preferably made of synthetic resin. is there.
- 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 5 and the solid particles 7 holding the oily liquid 5 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, so that the lubricating layer 3 containing an oily liquid such as edible oil is provided on the surface.
- Tg glass transition point
- the lubricating layer 3 containing an oily liquid such as edible oil is provided on the surface.
- the olefin resin is highly flexible and is also used for squeeze bottles by direct blow molding. From the viewpoint of applying the present invention to such a container, the olefin resin is Is suitable.
- the liquid 5 used for forming the lubricating layer 3 provided on the structure surface 1 is appropriate depending on the slippery object to be applied to the surface 1 (for example, the contents of the packaging material).
- a 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, making it difficult to form the lubricating layer 3.
- the liquid is a high-boiling liquid as described above, and is not miscible with the fluid substance flowing on the surface of the substrate 1, but further has high wettability with respect to the surface of the substrate 1.
- the contact angle (20 ° C.) with respect to the surface of the substrate 1 is 45 ° or less and the viscosity (25 ° C.) is 100 mPa ⁇ s or less. Is preferred. That is, regardless of whether the material forming the surface of the substrate 1 is made of synthetic resin, glass or metal, the lubricating layer 3 is formed by combining the liquid 5 satisfying the above physical properties with the fixed particles 7. What is necessary is just to form.
- 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.
- an oily liquid having a surface tension in the range of 10 to 40 mN / m, particularly 16 to 35 mN / m.
- Typical examples include fluorinated liquids, fluorinated surfactants, silicone oils, fatty acid triglycerides, 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 lubricating layer 3 containing the two components of the liquid 5 and the solid particles 7 described above is applied to the surface of the base material 1 (for example, the inner surface of the packaging material) in an amount of 1.0 to 6.2 mg / cm 2. It is desirable that it be formed. That is, if the amount is too small or too large, the lubricity improving effect by the lubricating layer 3 tends to be unstable.
- the solid particles 7 used as a constituent component of the lubricating layer 3 do not dissolve in the liquid 5 that is another constituent component of the lubricating layer 3 and can exist in a solid state. Although it does not dissolve in the fluid substance (for example, the contents of the container) flowing on the surface), it is particularly preferable that the particles have a particle diameter (particle median) of 300 ⁇ m or less, preferably 100 ⁇ m or less. If the particle diameter is too large, the influence on the lubricity of the solid particles 7 is reduced, and the solid particles 7 are liable to fall off due to their own weight. As a result, the lubricity improving effect tends to be insufficient. .
- the particle size is desirably 5 ⁇ m or more.
- the solid particles 7 need to be solid when the lubricating layer 3 is formed or in a use state of the structure, and the melting point is desirably 40 degrees or more.
- the raw material of the solid particles 7 is not particularly limited, and may be formed of various organic materials and inorganic materials.
- the solid particle 7 is a constituent of the base material 1 and the lubricating layer 3.
- organic particles are preferable to inorganic particles such as metal particles and metal oxides.
- inorganic particles such as metal particles and metal oxides.
- olefin wax, rice wax, carnauba wax, various celluloses, A cured product of an organic resin (for example, a cured product obtained by curing a polyfunctional acrylic monomer) or the like is preferable, and rice wax is preferable from the viewpoint that it can be used without limitation for use in food contents.
- the solid particles 7 as described above are contained in 100 parts by mass of the liquid that is a constituent of the lubricating layer 3 from the viewpoint of being effectively held on the surface of the substrate 1 while holding the liquid 5 on the particle surface. It is desirable that it is present in the lubricating layer 3 in a ratio of 0.01 to 10 parts by weight, particularly 0.1 to 5 parts by weight.
- the amount of the solid particles 7 is too large, the solid particles 5 aggregate and behave as apparently large particles, thereby improving the lubricity. Becomes lower. Further, as shown in the model diagram of FIG.
- the liquid 5 is liable to fall off and the effect of improving the lubricity is lowered.
- the liquid retention effect of the solid particles 7 at the bottom becomes unsatisfactory, and the effect of suppressing adhesion of the contents at the bottom may be insufficient.
- the solid particles 7 in the lubricating layer 3 may be exposed on the surface of the lubricating layer 3 while holding the liquid 5, or at least part of the solid particles 7 adhere to the surface of the substrate 1. Although it may exist, it is preferable that most of them are dispersed in the lubricating layer 3 in order to exhibit the greatest improvement in lubricity.
- the lubricating layer 3 containing the solid particles 7 described above is a coating prepared by mixing a predetermined amount of the predetermined amount of the solid particles 7 with the liquid 5 that is a component of the lubricating layer 3 and stirring the mixture.
- the coating liquid can be easily formed by spraying, dipping, or the like on the surface of the substrate 1 such as a container.
- a small amount of the liquid 5 and the solid particles 7 are mixed, and after the liquid is applied to the surface of the substrate 1, the remaining liquid 5 is applied on the coating layer by spraying or the like. be able to.
- the structure of the present invention having the surface structure described above has the form
- the form of the substrate 1 can be used as various forms depending on the application, such as a pipe shape, a container shape, and a lid shape.
- the structure of the present invention is suitably applied to the use of packaging materials.
- the base material 1 may be a synthetic resin container, a glass container, or a metal container, a cover material, a pouring tool (spout), or the like. It is suitably used as a form.
- the base material 1 forming this structure is a container made of a synthetic resin
- 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 liglide layer as an inner layer in which scraps such as burrs generated when forming a multilayer structure (base material 1) as described above are blended with a virgin resin such as an olefin resin.
- 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
- the coating liquid in which the solid particles 7 are dispersed in the liquid 5 forming the lubricating layer 3 is spray-sprayed to achieve the purpose.
- the solid particle-containing lubricating layer 3 can be formed.
- the lubricating layer 3 can also be formed by applying it to the inner surface of the container by application using a roller, a knife coater, or the like.
- FIG. 3 shows a direct blow bottle which is the most preferable form of the structure of the present invention. That is, in FIG. 3, this bottle generally indicated by 10 has a neck 11 provided with a thread, a trunk wall 15 connected to the neck 11 via a shoulder 13, and a bottom closing the lower end of the trunk wall 15. It has the wall 17, and the lubricating layer 3 mentioned above is formed in the inner surface of such a bottle 10, for example, it will be filled with the viscous content.
- the viscosity is particularly high. (25 ° C.) is suitably used as a container for storing viscous contents of 100 mPa ⁇ s or more, and particularly when the liquid film 3 is formed using the oily liquid described above, for example, mayonnaise, ketchup It is most suitable as a filling bottle for viscous contents such as cosmetic paste such as aqueous paste, honey, various sauces, mustard, dressing, jam, chocolate syrup and milky lotion, liquid detergent, shampoo and rinse.
- cosmetic paste such as aqueous paste, honey, various sauces, mustard, dressing, jam, chocolate syrup and milky lotion, liquid detergent, shampoo and rinse.
- the present invention will be described in the following experimental examples.
- the containers, synovial fluid (liquid 5 which is a constituent component of the lubricating layer 3), and contents used in each example and comparative 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
- 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 synovial fluid is 10 mg of edible oil used for the slide liquid with the inner surface of the container of the multilayer sheet of the sheet material being the upper surface, 20 ° C., 50% RH, contact angle meter (Kyowa Interface Science Co., Ltd.
- DropMaster700 Measured with viscosity; The viscosity of the synovial fluid was measured by putting the spindle and guard of a B-type digital viscometer into the liquid placed in a beaker, rotating the spindle for 1 minute at 25 ° C., and 10 rpm.
- 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 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 the inner surface forming material of the packaging material, a coating liquid in which rice wax (particle diameter 100 ⁇ m) is dispersed in edible oil A (synovial fluid) is applied in the ratio of solid particles in Table 1 and the coating amount. The slipperiness was evaluated.
- Example 7 The coating liquid 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 rice wax (particle diameter 50 ⁇ m). Was applied to evaluate the lubricity.
- Example 8 The coating liquid 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 rice wax (particle diameter 250 ⁇ m). Was applied to evaluate the lubricity.
- Example 9 Using a multilayer sheet as the inner surface forming material of the packaging material, except that the sliding liquid was changed to edible oil B, the coating liquid was applied in the ratio of solid particles in Table 1 and the coating amount in the same manner as in Experimental Example 1. Lubricity was evaluated.
- Example 10 The coating liquid was applied in 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 cellulose (particle diameter 120 ⁇ m). This 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 liquid was applied in the same manner as in Experimental Example 1 except for the ratio and the coating amount of the solid particles in Table 1, and the lubricity was evaluated.
- Example 12 Using a multi-layer bottle as a packaging material, a coating liquid in which rice wax (particle diameter: 100 ⁇ m) was dispersed in edible oil A was applied at the ratio of solid particle amount and coating amount shown in Table 1, and the bottom slip was evaluated.
- Example 13 Using a multi-layer bottle as a packaging material, a coating liquid in which rice wax (particle diameter: 50 ⁇ m) was dispersed in edible oil A was applied at the ratio of solid particle amount and coating amount shown in Table 1, and the bottom lubricity was evaluated.
- Example 14 Using a multi-layer bottle as a packaging material, a coating liquid 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 the inner surface forming material of the packaging material, a coating liquid 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 to improve lubricity. evaluated.
- Example 17 Using a multilayer sheet as the inner surface forming material of the packaging material, a coating liquid in which rice wax (particle diameter 350 ⁇ m) is dispersed in edible oil A is applied at the ratio of solid particle amount and application amount shown in Table 2 to improve 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 synovial fluid.
- Example 22 A multilayer bottle was used as a packaging material, and the bottom slip was evaluated without applying a sliding liquid.
- 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 solid particles in the lubricating layer is high, the residual rate of the lubricating layer is high.
- the ratio of the solid particles in the lubricating layer is too high, the solid particles may agglomerate to prevent the contents from slipping or 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 17: bottom 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、内容物に対する滑性がより向上しており、容器や蓋等の包装材として好適に使用される構造体を提供することにある。
本発明のさらに他の目的は、底部での粘稠な内容物の付着残存が有効に抑制されるレベルまで内容物に対する滑性が向上した容器を提供することにある。
(1)前記潤滑層に含まれる液体が、該潤滑層を支持している前記基材表面に対する接触角(20℃)が45°以下であり且つ100mPa・s以下の粘度(25℃)を有していること、
(2)前記固体粒子が、有機粒子であること、
(3)前記固体粒子が、前記潤滑層中の液体100質量部当り0.01~10質量部の量で該潤滑層中に存在していること、
(4)前記潤滑層が、1.0~6.2mg/cm2の量で前記基材表面に形成されていること、
(5)前記基材表面が合成樹脂製であること、
(6)前記基材表面がガラス製であること、
が好ましい。
(7)包装材として使用されること、
(8)前記包装材が、粘度(25℃)が1260mPa・s以上の流動性内容物の収容に使用されること、
(9)前記包装材が容器であること、
が好適である。
容器等の包装材の内面に液体層を形成することにより、内容物に対する滑性が向上することは、すでに公知である。そして、このような液体層が内面に形成されている包装材(例えば容器)から粘稠な内容物を排出する場合、この内容物は、液-液接触して包装材から排出されることとなる。即ち、固-液接触ではなく、液-液接触で内容物は包装材内面を流れ落ちるため、液体として内容物と混和しない油性のものを使用すれば、水を含む水性物質に対する滑性を向上させ、さらに、液体として内容物と混和しない水性のものを使用すれば、油性物質に対する滑性を向上させることができるというものである。
しかるに、本発明の構造体が有している潤滑層3は、液体5と固体粒子7との2成分を含んでおり、これにより、液体のみの層が形成されている場合に比して、流動性物質(例えば容器内容物)に対する滑性がより一層高められている。
即ち、液体5(流動パラフィン)及び固体粒子7(ライスワックス)の何れも流動性物質に対する滑性を向上させるものである。しかるに、本発明では、固体粒子7の存在により、潤滑層3中の液体5が安定に基材1の表面に保持され、さらに固体粒子7も液体5により基材1の表面に安定に保持され、この結果、両者の滑り性向上効果が相乗的に高められ、著しく優れた滑り性が発揮されるものと考えられる。
例えば、後述する表1及び表2では、内容物としてマヨネーズ様食品(粘度:1260mPa・s@25℃)を充填したボトルについて、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、液体5と固体粒子7とを含む潤滑層3が内面に形成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、本発明の構造体における潤滑層3の下地となる表面を有する基材1は、潤滑層3に含まれる液体5と固体粒子7とを保持し得ると同時に、包装材の形態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、本発明の構造体は、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を基材1として本発明を適用することが好ましく、従って、包装材内面(基材1の表面)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を表面に形成する場合には、この油性液体(液体5)の一部が内部に浸透し、この結果、液体5及び固形粒子7を含む潤滑層3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、本発明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。
構造体表面1上に設けられる潤滑層3の形成に使用される液体5としては、この表面1に付与しようとする滑性の対象物(例えば、包装材の内容物)に応じて適宜のものが使用されるが、かかる液体は、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、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。
さらに、この固体粒子7は、潤滑層3形成時或いは構造体の使用状態において固体であることが必要であり、その融点は40度以上であることが望ましい。
例えば、図2(a)のモデル図に示されているように、固体粒子7の量が多すぎると、固体粒子5は凝集して、見かけ上大きな粒子として挙動することとなり、滑性向上効果が低くなる。また図2(b)のモデル図に示されているように、固体粒子7の量が少なすぎると、液体5の脱落を生じ易くなり、滑性向上効果が低くなり、特に、この構造体を容器として使用する場合には、底部での固体粒子7の液体保持効果が不満足となり、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。
また、潤滑層3中の固体粒子7は、液体5を保持した状態で潤滑層3の表面に露出していてもよいし、固体粒子7の少なくとも一部が基材1の表面に付着して存在していてもよいが、最も大きな滑性向上効果を発現させるためには、その多くが潤滑層3中に分散されていることが好適である。
上述した表面構造を有する本発明の構造体は、液体5と固体粒子7とを含む潤滑層3が流動性物質と接触するように基材1の表面に形成されている限りにおいて、その形態は制限されず、例えば基材1の形態をパイプ形状、容器形状、蓋材形状等、用途に応じた種々の形態として使用に供することができる。
特に、本発明の構造体は、包装材の用途に好適に適用され、例えば、基材1を合成樹脂製容器、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)などの形態として好適に使用される。
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3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の内面に前述した潤滑層3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。
各実施例、比較例にて使用した容器、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(滑液)
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(滑液)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液を調製し、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;
滑液の接触角は、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;
滑液の粘度は、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、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(滑液)にライスワックス(粒子径100μm)を分散させたコーティング液を、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液を塗布し、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中の固体粒量の比率、塗布量でコーティング液を塗布し、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液を塗布し、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液を塗布し、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液を塗布し、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液を、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液を、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液を、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液を、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液を、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、滑液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、滑落液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。
次いで、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)と液体(食用油)を含むコーティング液を0.6ccガラス材(プレパラート)に塗布し、全体に馴染ませた後、垂直に30秒維持して、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。その結果を表3に示す。
尚、表中に示されていないが、潤滑層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
17:底壁
Claims (11)
- 所定形状に成形されている基材と、該基材表面に形成されている流動性物質に対する滑性を向上するための潤滑層とを含み、該潤滑層は、液体と固体粒子とから形成されていることを特徴とする構造体。
- 前記固体粒子が、300μm以下の粒子径を有している請求項1に記載の構造体。
- 前記潤滑層に含まれる液体が、該潤滑層を支持している前記基材表面に対する接触角(20℃)が45°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に記載の構造体。
- 前記固体粒子が、有機粒子である請求項1に記載の構造体。
- 前記固体粒子が、前記潤滑層中の液体100質量部当り0.01~10質量部の量で該潤滑層中に存在している請求項1に記載の構造体。
- 前記潤滑層が、1.0~6.2mg/cm2の量で前記基材表面に形成されている請求項1に記載の構造体。
- 前記基材表面が、合成樹脂製である請求項1に記載の構造体。
- 前記基材表面が、ガラス製である請求項1に記載の構造体。
- 包装材として使用される請求項1に記載の構造体。
- 前記包装材は、粘度(25℃)が1260mPa・s以上の流動性内容物の収容に使用される請求項9に記載の構造体。
- 前記包装材が容器である請求項10に記載の構造体。
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CN106470840A (zh) | 2017-03-01 |
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