Container for holding oil / fat composition

Abstract

The purpose of the present invention is to provide a container for holding an oil / fat composition, the container having a silicon oxide vapor deposition film displaying good oil-deflecting performance. Provided is a container for holding an oil / fat composition, the container having a silicon oxide vapor deposition film on the inside surface thereof. The container has oil / fat slidability of less than 300 seconds on the inside surface thereof. The oil / fat slidability is defined as the time (seconds) required for a rapeseed oil droplet of 24 ±0.5 mg to move 6 mm over a sample surface when the sample surface is inclined by 70° with respect to the vertical at the temperature of 23 ±3°C.

Description

Container for storing oil and fat composition

[0001] The present invention relates to a container for storing an oil or fat composition having a silicon oxide vapor-deposited film, and particularly to a container for storing an oil or fat composition that allows for good oil drainage.

[0002] Conventionally, films have been formed on the surfaces of various substrates to improve their properties. For example, in the case of packaging materials, vapor-deposited films are formed on the surfaces of plastic molded products by plasma CVD to improve their gas barrier properties.

[0003] For example, a method for manufacturing a plastic container is known in which the concentration of the organosilicon compound changes when a barrier layer (vapor-deposited film) containing silicon oxide and at least one compound consisting of at least one or more elements selected from carbon, hydrogen, silicon, and oxygen is formed on at least one side of the plastic container by plasma CVD using at least an organosilicon compound and oxygen or a gas having oxidizing power. The gas flow ratios of the organosilicon compound (hexamethyldisiloxane) and oxygen were 1:2, 1:20, and 1:100 (see Patent Document 1).

[0004] It has also been shown that a silicon oxide film produced at a flow rate ratio of an organosilicon compound gas to a gas containing oxygen atoms in the range of 1:3 to 50, and having a component ratio of 100 Si atoms to 170 to 200 O atoms and 30 or less C atoms, has gas barrier properties (see Patent Document 2).

[0005] On the other hand, for containers, cooking utensils, and the like, good cleanability and ease of content drainage after use improve workability and reduce environmental impact. Therefore, water and oil repellency are also required as characteristics of the substrate of containers, cooking utensils, and the like. For example, a bottle with good drainage properties has been proposed by forming an organic silicon compound film containing nitrogen, silicon, carbon, and hydrogen, and then forming a silicon oxide compound film mainly composed of silicon oxide compounds on the surface using a CVD method (a gas flow rate ratio of hexamethyldisiloxane to oxygen of 1:4) (see Patent Document 3). There has also been a proposal for a functional material in which the functional layer is specified by the element ratio of carbon-containing silicon oxide (see Patent Document 4). However, silicon oxide compound films that focus on the ability of oils and other substances to slide off from oil and fat storage containers have not been studied to date.

[0006] JP 2000-255579 A JP 2003-53873 A JP 2009-46162 A JP 2022-162775 A

[0007] One of the objects of the present invention is to provide a container for storing an oil or fat composition that is coated with a silicon oxide vapor-deposited film and has good oil-draining properties.

[0008] As a result of extensive research, the present inventors have found that a container with good oil-draining properties can be obtained by adjusting the sliding properties of an oil or fat composition in a container, and have completed the present invention.

[0009] That is, one aspect of the present invention may relate to the following: [1] A container for storing an oil or fat composition having a silicon oxide vapor-deposited film on its inner surface, wherein the sliding property of oils and fats on the inner surface of the container according to the following definition is 300 seconds or less: Sliding property of oil or fats: The time (seconds) for a 24±0.5 mg droplet of rapeseed oil to move 6 mm on a sample surface inclined at 70° to the vertical at 23±3°C [2] The container for storing an oil or fat composition according to the above [1], wherein the reduction rate of the amount of residual oil or fat in the container according to the following definition is 20% by mass or more.

[0013] The oil-and-fat composition container according to any one of [1] to [2], wherein the oil-and-fat composition is filled in the container and discharged from the opening of the container by tilting the container 160° relative to the vertical, and the amount of the oil-and-fat composition remaining in the container 600 seconds after the oil-and-fat composition starts to be discharged from the container is defined as the amount of residual oil and fat A (% by mass), and the amount of the oil-and-fat composition remaining in a container identical to the oil-and-fat composition container except that it does not have a silicon oxide vapor-deposited film on its inner surface is measured and defined as the amount of residual oil and fat B (% by mass). The amount of residual oil and fat B is a value that satisfies the following formula:

[0014] The oil-and-fat composition container according to any one of [1] to [2], wherein the silicon oxide vapor-deposited film is a film formed by vapor-depositing hexamethyldisiloxane. [5] The container for storing an oil or fat composition according to any one of [1] to [4] above, which stores an oil or fat composition.

[0010] According to the present invention, it is possible to provide a container for storing an oil or fat composition having a silicon oxide vapor-deposited film that exhibits good oil-draining properties. Furthermore, a container coated with this silicon oxide vapor-deposited film on its surface is expected to have good oil-draining properties, easy removal of oily stains, and good cleanability against oily stains. Furthermore, the container of the present invention is expected to allow the oil or fat composition stored therein to be used up to the last drop, making it less likely that oil or fat will remain in the container, and improving the recyclability of the container.

[0011] The present invention will be described in detail below by way of example. In the embodiments of the present invention, A (numerical value) to B (numerical value) means A or more and B or less. The preferred and more preferred embodiments exemplified below can be used in appropriate combinations with each other, regardless of expressions such as "preferable" or "more preferred." Furthermore, the descriptions of numerical ranges are merely examples, and ranges obtained by appropriately combining the upper and lower limits of each range and the numerical values ​​of the examples can also be preferably used, regardless of expressions such as "preferable" or "more preferred." Furthermore, terms such as "contain" or "comprise" may be interpreted as "essentially consisting of" or "consisting only of," as appropriate.

[0012] [Container for storing an oil / fat composition] The container for storing an oil / fat composition described herein is a container for storing an oil / fat composition having a silicon oxide vapor-deposited film on its inner surface, and the oil / fat sliding property on the inner surface of the container is within 300 seconds, as defined below: Oil / fat sliding property: The time (seconds) required for a 24±0.5 mg rapeseed oil droplet to move 6 mm on a sample surface inclined at 70° to the vertical at 23°C±3°C. The container for storing an oil / fat composition described herein provides an oil / fat composition storage container with good oil-shedding properties by adjusting the oil-shedding property as described above. Oil repellency and water repellency are indicators of the ability to separate liquids or pastes such as oils and fats from the container containing them. However, oil repellency and water repellency have different effects and different ranges of conditions under which they are exhibited, and furthermore, good oil repellency does not necessarily mean that the container has good oil-shedding properties, i.e., no oil or fat remains on the container. Without being bound by theory, this is thought to be because oil repellency and water repellency are related to static contact between the container surface and a liquid, while oil-shedding is related to dynamic contact between the container surface and the oil. Therefore, the present invention focuses on the sliding properties of oils and fats on the surface of a container for storing an oil and fat composition, thereby providing a container for storing an oil and fat composition with good oil-shedding properties. Furthermore, by focusing on the sliding properties of the oil and fat composition in addition to the sliding properties of the oil and fat, a container for storing an oil and fat composition with good oil-shedding properties is provided. Here, the container for storing an oil and fat composition is a container suitable for storing oils and fats or compositions containing oil and fat, and the oil and fat composition means not only oil and fat alone but also any product containing oil and fat (oil and fat or oil-containing composition). Furthermore, the oil and fat composition is preferably liquid or fluid at, for example, 20°C. In this specification, the term "oil," such as the "oil" used in "oil-shedding" and "oil repellency," may refer not only to oils indicating liquid oil, but also to oils and fats and any product containing oil and fat (oil and fat composition). In addition, in this specification, the terms "oil," "fat," "fat composition," and "fat-containing composition" may be read interchangeably.

[0013] (Sliding property of oils and fats or oil and fat compositions) The sliding property of oils and fats or oil and fat compositions is measured based on the time (seconds) it takes for a 24±0.5 mg droplet (or liquid droplet) of rapeseed oil or the like to move 6 mm on a sample surface inclined at 70° from the vertical at 23±3°C. The measurement is performed based on the rear end of the droplet (or liquid droplet) of rapeseed oil or the like, that is, the uppermost point of contact between the sample surface and the oil and fat droplet on the inclined sample surface. Rapeseed oil may be dropped onto a sample surface inclined at 70° from the vertical, or it may be dropped onto a horizontally placed sample surface and then measured at a 70° inclination from the vertical. The sample to be measured is a container for storing the oil and fat composition, and may be measured as is, or a smooth portion of the container for storing the oil and fat composition to be measured may be cut out and used as a flat or approximately flat sample. The method for tilting the sample 70° from the vertical can be any known method, but for example, the "Stage AG85 (Angle Incline)" manufactured by AS ONE Corporation may be used. The oil dripped onto the sample surface of the container for storing the oil / fat composition is, for example, rapeseed oil. Refined rapeseed oil can be used, and rapeseed oil sold for edible use or rapeseed oil sold as a reagent can be used. Rapeseed oil sold for edible use can be "refined rapeseed oil" or "rapeseed salad oil" as defined in the JAS standard ("Japanese Agricultural Standards for Edible Vegetable Oils and Fats," Ministry of Agriculture, Forestry and Fisheries Notification No. 681, August 19, 2019). For example, "Nissin Canola Oil" (manufactured by Nisshin Oillio Group, Inc.) can be used. Furthermore, "Rapeseed Oil" (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.: Wako Grade 1) can be used as a reagent. An oil-soluble colorant may be added to improve the visibility of the rapeseed oil. For example, about 0.1% by mass of beta-carotene can be added to rapeseed oil. The addition of this amount of beta-carotene does not substantially affect the slipperiness of the oil itself (the presence or absence of beta-carotene does not substantially change the slipperiness of the oil). Refined rapeseed oil typically contains 51 to 66% by mass of oleic acid, 19 to 28% by mass of linoleic acid, 2 to 11% by mass of linolenic acid, 3 to 6% by mass of palmitic acid, and 1 to 3% by mass of stearic acid.The amount of the oil / fat mixture dropped is 24±0.5 mg, preferably about 24.36 mg, which is the amount of one drop from a commercially available dropper. When the oil / fat composition is stored in a container, various oils or compositions containing oils, such as emulsified dressings or separated dressings, may be used instead of the oil / fat, and the sliding property may be measured in the same manner as above. An emulsified dressing is a dressing obtained by emulsifying oils and fats, and includes mayonnaise and mayonnaise-type dressings. The sliding property of the oil / fat is tested by placing the above-mentioned amount of rapeseed oil on the sample surface (inclined 70° from the vertical) of the container for storing the oil / fat composition at 23°C±3°C (measurement start), and measuring the time (seconds) required for the rear end of the placed oil / fat droplet to move 6 mm. The sliding property of the oil or fat measured under these conditions is preferably within 300 seconds from the start of measurement, for example, more than 60 seconds to 300 seconds, more preferably more than 20 seconds to 60 seconds, even more preferably more than 10 seconds to 20 seconds, and particularly preferably within 10 seconds.

[0014] (Residual Fat Amount) The reduction rate of the residual fat amount (in the case of a fat or oil composition, the amount of the remaining fat or oil composition) in the storage container described in this specification is preferably 40% by mass or more, more preferably 50% by mass or more or 60% by mass or more, even more preferably 80% by mass or more, and most preferably 90% by mass or more. The method for measuring the reduction rate of the residual fat amount and its definition are as follows. First, a fat or oil composition storage container filled with fat or oil or oil composition and having an opening at the top end (the top end is open and the bottom end is closed) is prepared. The fat or oil composition storage container has a silicon oxide vapor-deposited film on its inner surface, which is the subject of evaluation of the reduction rate of the residual fat amount, and an untreated fat or oil composition storage container identical to the fat or oil composition storage container except that it does not have a silicon oxide vapor-deposited film on its inner surface is used. Generally, a silicon oxide vapor-deposited film is formed after the container is molded, so the untreated fat or oil composition storage container can be a container that has not been subjected to a silicon oxide vapor deposition process immediately after molding.

[0015] The shape of the container is not limited, since the effect of the shape of the container on the amount of residual oil can be canceled out by measuring and comparing the amount of residual oil in a container having a silicon oxide vapor-deposited film on its inner surface with the amount of residual oil in a container not having a silicon oxide vapor-deposited film on its inner surface. For example, a bottle shape, a cylindrical shape, or a bag shape (pillow shape) is preferred.

[0016] The amount of oil or fat composition filled is the usable volume of the container, and for example, if the container is filled with 600 g of edible oil or fat and sold, it is 600 g. Generally, the usable volume of an oil or fat composition container is set to be 90% or more of the container capacity. The usable volume of the container is preferably 90 to 2000 g, more preferably 150 to 1300 g, and even more preferably 400 to 800 g.

[0017] The material of the container is not limited, since the influence of the container material on the amount of residual oil can be canceled out by measuring and comparing the amount of residual oil in a container having a silicon oxide vapor-deposited film on its inner surface with the amount of residual oil in a container not having a silicon oxide vapor-deposited film on its inner surface.

[0018] The type of oil or fat to be filled is not limited, since the residual oil amount in a container having a silicon oxide vapor-deposited film on its inner surface and the residual oil amount in a container not having a silicon oxide vapor-deposited film on its inner surface can be measured and compared using the same type of oil or fat, thereby canceling out analytical variations due to differences in the oil or fat. It is preferable to use an oil or fat having a triglyceride structure as the oil or fat to be measured, since similar physical properties can be expected with other triglycerides, and similar reduction rates in the residual oil amount can be expected. For example, animal and vegetable oils or fats, processed oils and fats thereof, and synthetic oils are preferred as oils or fats having a triglyceride structure. These may be used alone, or mixed oils or fractionated oils may be used. Examples of animal and vegetable oils or fats include rapeseed oil, soybean oil, corn oil, cottonseed oil, safflower oil, sunflower oil, sesame oil, perilla oil, linseed oil, peanut oil, palm oil, palm kernel oil, and coconut oil. The temperature at which the oil or fat is actually discharged from the container is equal to or higher than the melting point of the oil or fat, and since the amount of residual oil or fat can be measured at or above the melting point, a solid oil can also be used. More preferably, the oil is liquid at 20°C, and the above-mentioned rapeseed oil is even more preferred.

[0019] A container for storing a fat or oil composition, filled with the fat or oil composition and having an opening at its upper end, is quickly tilted at an angle of 160° relative to the vertical. That is, the container for storing the fat or oil composition is tilted from an upright state (0° relative to the vertical: a state in which the opening faces vertically upward) to 160° relative to the vertical (a state in which the opening is positioned vertically below the bottom of the container), and the fat or oil is discharged from the upper opening of the container. The time when the fat or oil composition begins to be discharged from the container opening is defined as 0 seconds, and the amount of fat or oil composition remaining in the container 600 seconds after that is defined as the residual fat or oil amount. This elapsed time may further be 150 seconds, 200 seconds, or 300 seconds. Here, when the amount of residual oil and fat in a container for storing an oil and fat composition having a silicon oxide vapor-deposited film on its inner surface is defined as residual oil and fat amount A (% by mass), and the amount of residual oil and fat in a container that is identical to the container for storing an oil and fat composition except that it does not have a silicon oxide vapor-deposited film on its inner surface is defined as residual oil and fat amount B (% by mass), the reduction rate of the residual oil and fat amount can be calculated from the following formula: Reduction rate (%) of residual oil and fat amount = (1 - A / B) × 100.

[0020] (Silicon oxide vapor-deposited film) The container for storing a fat or oil composition of the present invention is a container for storing a fat or oil composition, at least its inner surface of which is coated with the above-mentioned silicon oxide vapor-deposited film. The surface coating may be on all or part of the inner and outer surfaces of the container for storing a fat or oil composition, but by having a silicon oxide vapor-deposited film on the outermost layer of the inner surface of the container for storing a fat or oil composition, the oil or oil content can be easily discharged. Furthermore, the silicon oxide vapor-deposited film of the present invention may have another coating between the substrate of the container for storing a fat or oil composition and the coating layer of the silicon oxide vapor-deposited film.

[0021] In the present invention, the effects of the present invention can be achieved by selecting a silicon oxide vapor-deposited film that allows oils and fats to slide off the inner surface of a container within 300 seconds. Examples of silicon oxide vapor-deposited films that have this sliding property include the following silicon oxide vapor-deposited films: The surface of the silicon oxide vapor-deposited film has, in ionic strength measurements obtained by time-of-flight secondary ion mass spectrometry, a ratio of the sum of the intensity of ion a (ionic strength A) and the intensity of ion ao (ionic strength AO) to the intensity of ion s (ionic strength S) ((ionic strength A + ionic strength AO) / ionic strength S) of 10 or more, and / or a ratio of the ionic strength AO of ion ao to the ionic strength S of ion s (ionic strength AO / ionic strength S) of 0.7 or more. In another embodiment, the silicon oxide vapor-deposited film of the present invention has, in ionic strength measurements obtained by time-of-flight secondary ion mass spectrometry, (a) a ratio of ionic strength AO to ionic strength B (ionic strength AO / ionic strength B) of 3 or more. The silicon oxide vapor-deposited film of the present invention is preferably a silicon oxide vapor-deposited film in which, in terms of ionic strengths measured by time-of-flight secondary ion mass spectrometry, the surface of the silicon oxide vapor-deposited film has: (b) a ratio of the ionic strength AO to the ionic strength A (ionic strength AO / ionic strength A) of 0.1 or more or 0.2 or more; and / or (c) a ratio of the sum of the ionic strength A and the ionic strength AO to the ionic strength S ((ionic strength A+ionic strength AO) / ionic strength S) of 10 or more; and / or (d) a ratio of the ionic strength AO to the ionic strength S (ionic strength AO / ionic strength S) of 0.7 or more.

[0022] Here, ion s, ion a, ion ao, ion b, ion intensity S, ion intensity A, ion intensity AO, and ion intensity B are as follows: Ion s is a positive ion with m / z 43.97. Ion a is a positive ion with m / z 43.00, a positive ion with m / z 59.03, and a positive ion with m / z 73.05. Ion ao is a negative ion with m / z 31.02, a negative ion with m / z 59.00, a negative ion with m / z 74.99, a positive ion with m / z 102.97, and a negative ion with m / z 134.96. Ion b is a positive ion with m / z 78.99 and a positive ion with m / z 138.95. Ion intensity S is the intensity of the positive ion with m / z 43.97. Ion intensity A is the sum of the intensities of the positive ions at m / z 43.00, m / z 59.03, and m / z 73.05. Ion intensity AO is the sum of the intensities of the negative ions at m / z 31.02, m / z 59.00, m / z 74.99, m / z 102.97, and m / z 134.96. Ion intensity B is the sum of the intensities of the positive ions at m / z 78.99 and m / z 138.95.

[0023] In the present invention, ions detected by time-of-flight secondary ion mass spectrometry are identified by m / z (a dimensionless quantity obtained by dividing the mass m of an ion by the valence of the ion). The intensity of an ion (ion intensity) is a value that depends on the number of ions detected by time-of-flight secondary ion mass spectrometry (a value detected for each ion of each m / z).

[0024] The silicon oxide vapor deposition film of the present invention can be produced by a plasma CVD method using a reactive gas containing an organosilicon compound, and it is believed that by leaving a certain amount or more of alkyl groups and / or alkoxy groups in the silicon oxide vapor deposition film, and / or by leaving a certain ratio of hydroxyl groups and alkoxy groups in the silicon oxide vapor deposition film, the film will exhibit oil-repellent properties and slippery properties for oils and fats.

[0025] The content of components containing hydroxyl groups and / or alkoxy groups and / or alkyl groups in a silicon oxide vapor-deposited film correlates with the intensity of peaks derived from functional groups, which is obtained by analyzing the surface of the silicon oxide vapor-deposited film by time-of-flight secondary ion mass spectrometry (TOF-SIMS). Therefore, the silicon oxide vapor-deposited film of the present invention is required to have a certain ratio of the ionic strength of ions presumed to contain hydroxyl groups and / or alkoxy groups and / or alkyl groups to the ionic strength of ions presumed to be derived only from silicon oxide, as measured by time-of-flight secondary ion mass spectrometry.

[0026] The ions assumed to be derived only from silicon oxide (ion s) are positive ions with m / z 43.97 (SiO), and the ionic strength of this ion is ionic strength S. The ions assumed to contain alkyl groups (ion a) are positive ions with m / z 43.00 (SiCH), positive ions with m / z 59.03 (SiC2H7), and positive ions with m / z 73.05 (SiC3H9), and the sum of these ionic strengths is ionic strength A. The ions assumed to contain alkoxy groups (ions ao) are the negative ions with m / z 31.02 (CH3O), the negative ions with m / z 59.00 (SiCHO), the negative ions with m / z 74.99 (SiCH3O2), the positive ions with m / z 102.97 (Si2CH3O2), and the negative ions with m / z 134.96 (Si2CH3O4), and the sum of these ionic intensities is the ionic strength AO. Furthermore, the ions assumed to contain hydroxyl groups (ions b) are the positive ions with m / z 78.99 (SiO3H3) and the positive ions with m / z 138.95 (SiO5H3), and the sum of these ionic intensities is the ionic strength B.

[0027] The silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in terms of ionic intensities measured by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, (a) the ratio of ionic strength AO to ionic strength B (ionic strength AO / ionic strength B) is preferably 3 or more, more preferably 6 or more, even more preferably 8 or more, particularly preferably 12 or more, and particularly preferably 14 or more. The silicon oxide vapor-deposited film of the present invention is preferably a silicon oxide vapor-deposited film in which, in terms of ionic intensities measured by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, (b) the ratio of ionic strength AO to ionic strength A (ionic strength AO / ionic strength A) is 0.1 or more or 0.2 or more, preferably 1.8 or more or 1.9 or more, and more preferably 2.0 or more. In another embodiment, the silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in the ionic strength measurement obtained by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, the ratio of the sum of ionic strength A and ionic strength AO to (c) ionic strength S ((ionic strength A + ionic strength AO) / ionic strength S) is 10 or more, preferably 20 or more, more preferably 30 or more, and even more preferably 33 or more. Furthermore, the silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in the ionic strength measurement obtained by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, the ratio of ionic strength AO to (a)' ionic strength B (ionic strength AO / ionic strength B) is preferably 20,000 or less or 14,000 or less, more preferably 500 or less, 200 or less, 100 or less, 50 or less, or 40 or less. The silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in the ionic strengths measured by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, the ratio of the ionic strength AO to the ionic strength A (ionic strength AO / ionic strength A) (b)' is preferably 5 or less, more preferably 3 or less, or 1 or less.Furthermore, the silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in the ionic strength measured by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, the ratio of the sum of ionic strength A and ionic strength AO to ionic strength S ((ionic strength A+ionic strength AO) / ionic strength S) is preferably 60,000 or less or 45,000 or less, more preferably 1,000 or less or 600 or less, even more preferably 100 or less, and particularly preferably 80 or less.

[0028] In yet another embodiment, the silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in the ionic strengths measured by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, the ratio of ionic strength AO to ionic strength S (ionic strength AO / ionic strength S) may be 0.7 or more, preferably 0.8 or more, more preferably 1 or more, even more preferably 5 to 500, and particularly preferably 7 to 250. In yet another embodiment, the silicon oxide vapor-deposited film of the present invention is a silicon oxide vapor-deposited film in which, in the ionic strengths measured by time-of-flight secondary ion mass spectrometry of the surface of the silicon oxide vapor-deposited film, the ratio of ionic strength AO to ionic strength S (ionic strength AO / ionic strength S) may be 0.7 or more, preferably 1 to 200, more preferably 10 to 150, and most preferably 20 to 50.

[0029] Furthermore, with regard to the ionic strength, (e) the ratio of ionic strength A to ionic strength S (ionic strength A / ionic strength S) is preferably 5 or more, more preferably 6 or more, even more preferably 7 or more, and particularly preferably 40 or more.

[0030] Regarding the effects of alkyl and alkoxy groups in silicon oxide vapor-deposited films on oil repellency and oil-slippage, the more alkoxy groups there are relative to the alkyl groups, the higher the oil repellency and oil-slippage. Therefore, at the peak, (f) the ratio of ionic strength AO to ionic strength A (ionic strength AO / ionic strength A) is preferably 0.2 or more, more preferably 0.5 or more, and even more preferably 1 or more. Here, the above conditions (a) to (f) and (a)' to (c)' may or may not be satisfied by combining two or more of the conditions (a) to (f) and (a)' to (c)'. Preferably, the combination is a combination of (a) with one or more of (b) to (f) and (a)' to (c)', or a combination of (c) or (c)' with (d) and, optionally, one or more of the conditions (a), (b), and (e) to (f).

[0031] In the present invention, time-of-flight secondary ion mass spectrometry can be performed using a commercially available device. For example, a time-of-flight secondary ion mass spectrometer ("TOF.SIMS5" manufactured by ION-TOF GmbH, Germany, measurement area: 500 μm square, primary ion source: Bi) sold by Hitachi High-Tech Science Corporation can be used.

[0032] The silicon oxide vapor-deposited film of the present invention can achieve good oil repellency and oil and grease sliding properties by simply covering the surface, so the thickness of the film is not considered to have any particular effect. The film thickness is not particularly limited, but is preferably 1 to 800 nm, more preferably 5 to 500 nm, even more preferably 8 to 400 nm, particularly preferably 10 to 300 nm, and most preferably 10 to 150 nm.

[0033] The thickness of the silicon oxide vapor-deposited film can be measured, for example, using a microscopic automatic film thickness measurement system (model number: F54 XY 200UV) manufactured by Filmetrics Inc., a stylus film thickness meter "DEKTAK" manufactured by Bruker, or by preparing a cross section of the film and measuring it with a field emission scanning electron microscope "JSM-7800F Prime" (magnification 30,000 times, acceleration voltage 2 kV, working distance 10.3 mm) manufactured by JEOL Ltd. The portion of the container for storing the oil or fat composition that is coated with the silicon oxide vapor-deposited film may be all or a part of the container, and in particular, it may be only the surface portion that comes into contact with the oil or fat.

[0034] In the container for storing an oil or fat composition of the present invention, the contact angle of rapeseed oil at 23°C ± 3°C on the surface covered with the silicon oxide vapor-deposited film is preferably 20° or more, more preferably 20 to 90°, even more preferably 25 to 80°, and most preferably 30 to 60°. The rapeseed oil here is as described above.

[0035] (Materials and parts of the container for storing an oil or fat composition) The container (substrate) for storing an oil or fat composition of the present invention is preferably formed from a material selected from the group consisting of resin, glass, paper, china clay, and metal, and more preferably from resin. By providing the silicon oxide vapor-deposited film on the inner surface of the container for storing an oil or fat composition, it is possible to obtain a container for storing an oil or fat composition that is prevented from being soiled with oil or fat and has improved oil and fat removability. Suitable resins include thermoplastic resins known per se, such as low-density polyethylene, high-density polyethylene, polypropylene, poly-1-butene, poly-4-methyl-1-pentene, polyolefins (for example, polyolefins such as random or block copolymers of α-olefins such as ethylene, propylene, 1-butene, and 4-methyl-1-pentene), ethylene-vinyl compound copolymers (for example, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-vinyl chloride copolymer), styrene-based resins (for example, polystyrene, acrylonitrile-styrene copolymer, A copolymer), and the like. Examples of suitable resins include biodegradable resins such as polyethylene terephthalate, polybutylene terephthalate, and polylactic acid, as well as mixtures thereof. Examples of suitable resins include polyethylene and polyethylene terephthalate. Examples of suitable metals include one or more metals selected from iron, nickel, copper, zinc, lead, aluminum, chromium, titanium, and the like, or alloys containing one or more of these metals as a main component. Examples of suitable metals include polyvinyl compounds (e.g., polyvinyl chloride, polyvinylidene chloride, vinyl chloride-vinylidene chloride copolymers, polymethyl acrylate, polymethyl methacrylate, and the like), polyamides (e.g., nylon 6, nylon 6-6, nylon 6-10, nylon 11, and nylon 12), thermoplastic polyesters (e.g., polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate), polycarbonate, polyphenylene oxide, and polylactic acid, as well as mixtures thereof. Examples of suitable resins include polyethylene and polyethylene terephthalate. Examples of suitable metals include one or more metals selected from iron, nickel, copper, zinc, lead, aluminum, chromium, and titanium, as well as alloys containing one or more of these metals as a main component. Stainless steel is more preferred.

[0036] Examples of such containers for storing oil and fat compositions include bottles, tanks, pillows, cups, deep plates, containers, etc., and the lids, caps, handles, nozzles, etc. that constitute the containers can also be recognized as parts of the container. As the containers for storing oil and fat compositions, molded products such as bottles, tanks, pillows, containers, etc. for oils and fats are particularly preferred.

[0037] (Oil and fat composition to be stored) The container for storing an oil and fat composition of the present invention may be a container for storing an oil and fat composition in which an oil and / or an oil and fat composition is stored. The oil and fat stored in the container for storing an oil and fat composition is preferably, for example, one having a triglyceride structure, and animal and vegetable oils, processed oils thereof, and synthetic oils are preferred. These may be used alone, or mixed oils or fractionated oils may be used. Examples of animal and vegetable oils include rapeseed oil, soybean oil, corn oil, cottonseed oil, safflower oil, sunflower oil, sesame oil, perilla oil, linseed oil, peanut oil, palm oil, palm kernel oil, coconut oil, etc. Mixed oils or fractionated oils of these may also be used. More preferably, the oil is liquid at 20°C, and the above-mentioned rapeseed oil is even more preferred. It is preferably edible. Furthermore, an oil and fat composition in which an emulsifier, antifoaming agent, antioxidant, etc. are dispersed or dissolved in the oil and fat composition may also be used, as long as the effects of the present invention are not impaired. The content of components other than fats and oils is preferably 20% by mass or less, more preferably 5% by mass or less. Examples of fat and oil compositions to be stored in the fat and oil composition storage container include those containing water in addition to fats and oils, such as separated dressings and emulsified dressings. Examples of separated dressings that can be used include Japanese-style dressings and French dressings, and examples of emulsified dressings that can be used include sesame-flavored dressings, mayonnaise, and mayonnaise-type dressings.

[0038] [Method for manufacturing a container for storing an oil or fat composition] The container for storing an oil or fat composition of the present invention can be manufactured by coating the container with a silicon oxide vapor-deposited film by a plasma CVD method using an organosilicon compound and any oxidizing gas as reactive gases, where ionic strength S, ionic strength A, ionic strength AO, and ionic strength B and their proportions are as described above in [Silicon oxide vapor-deposited film].

[0039] (Organosilicon Compound and Oxidizing Gas) In the method for producing a container for storing an oil or fat composition of the present invention, an organosilicon compound is used as a silicon source for forming a silicon oxide vapor-deposited film. Examples of the organosilicon compound include organosilane compounds (e.g., hexamethyldisilane, vinyltrimethylsilane, methylsilane, dimethylsilane, tetramethylsilane, trimethylsilane, diethylsilane, propylsilane, phenylsilane, methyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, tetramethoxysilane, tetraethoxysilane, phenyltrimethoxysilane, methyltrimethoxysilane, and methyltriethoxysilane), organosiloxane compounds (e.g., octamethylcyclotetrasiloxane, 1,1,3,3-tetramethyldisiloxane, and hexamethyldisiloxane), diethoxydimethylsilane, and dimethyldimethoxysilane. In addition to these materials, silazanes such as hexamethyldisilazane, aminosilanes, etc. can also be used. These organosilicon compounds can be used alone or in combination of two or more. Silane (SiH4) or silicon tetrachloride can also be used in combination with the above-mentioned organosilicon compounds. Organosilicon compounds having only functional groups selected from methyl groups, methoxy groups, ethyl groups, and ethoxy groups as the organic functional groups of the organosilicon compound are preferred, organosilicon compounds having ethoxy groups and / or methoxy groups are more preferred, and organosilicon compounds having only ethoxy groups are even more preferred. Organosilicon compounds having only methyl groups are also even more preferred. Tetraethoxysilane, tetramethoxysilane, hexamethyldisilazane, hexamethyldisiloxane, etc. are preferred, and organosilicon compounds containing only hexamethyldisiloxane or hexamethyldisiloxane are more preferred.

[0040] The oxidizing gas may be oxygen or NOx, with oxygen being preferred. The carrier gas and discharge stabilizing gas may be a rare gas such as argon or helium.

[0041] In the method for producing a container for storing an oil or fat composition of the present invention, the container for storing an oil or fat composition is preferably coated with a silicon oxide vapor-deposited film by a plasma CVD method in which the ratio of the flow rate (volume) of the oxidizing gas to the total flow rate (volume) of the reactant gas is 0 to 95% by volume. By using these conditions, a silicon oxide vapor-deposited film with particularly excellent oil and fat sliding properties can be obtained. The ratio of the flow rate (volume) of the oxidizing gas to the total flow rate (volume) of the reactant gas is more preferably 1 to 65% by volume or 1 to 60% by volume, even more preferably 2 to 40% by volume or 2 to 30% by volume, and most preferably 5 to 10% by volume. The flow rate of the reactant gas depends on the coverage area of ​​the container for storing an oil or fat composition to be treated. For example, when coating the inner surface of a plastic container with a capacity of 400 mL to 1.5 L, it is preferable to supply the reactant gas at a flow rate of 3 to 2000 sccm, particularly 5 to 600 sccm, per container. The term "sccm" refers to the amount (cc or ml) of gas flowing per minute at 0° C. and 1 atmosphere.

[0042] (Plasma CVD Method) In the present invention, a substrate surface held in a plasma treatment chamber is subjected to plasma treatment by the plasma CVD method in an atmosphere containing the above-mentioned organosilicon compound, an optional oxidizing gas, and, if necessary, a carrier gas, to form a vapor-deposited film having the above-mentioned composition.

[0043] During plasma treatment, the plasma treatment chamber is maintained at a vacuum level sufficient to generate glow discharge, and the pressure during film formation is preferably 1 to 200 Pa, more preferably 3 to 100 Pa. Under this condition, microwaves (300 MHz to 300 GHz) or radio frequency waves (1 to 300 MHz) are supplied to form a silicon oxide vapor deposition film by glow discharge. For example, the microwave output is preferably in the range of 10 to 1000 W, more preferably 20 to 1000 W. The microwave frequency is preferably 500 MHz to 30 GHz, more preferably 1 to 10 GHz, and even more preferably 1 to 5 GHz. The radio frequency output is preferably 20 to 1500 W, more preferably 30 to 1500 W. The radio frequency frequency is preferably 1 to 100 MHz, more preferably 1 to 30 MHz, and even more preferably 10 to 15 MHz.

[0044] In the method for producing a container for storing a fat or oil composition of the present invention, it is sufficient that the outermost layer on the inner surface of the container for storing a fat or oil composition is a silicon oxide vapor-deposited film coated under the above-mentioned conditions, and a container for storing a fat or oil composition coated under other conditions may be further coated under the above-mentioned production conditions. Also, the conditions of the plasma CVD method may be changed, for example, by changing the amount of oxidizing gas supplied, and finally coating may be performed under the above-mentioned production conditions.

[0045] Next, the present invention will be described in more detail with reference to Examples, Comparative Examples, and Reference Examples, but the present invention is not limited thereto. Furthermore, hereinafter, "%" refers to mass % unless otherwise specified. In the tables, "(A + AO) / S" means "(ionic strength A + ionic strength AO) / ionic strength S," "A / S" means "ionic strength A / ionic strength S," "AO / S" means "ionic strength AO / ionic strength S," "AO / A" means "ionic strength AO / A," and "AO / B" means "ionic strength AO / B."

[0046] [Comparative Examples 1 to 3 and Examples 1 to 4] (Plasma CVD Apparatus 1) The film formation conditions using the plasma CVD apparatus 1 used in the comparative examples and examples are as shown in Table 1. The settings of the plasma CVD apparatus 1 other than those in Table 1 are as follows. Name: Plasma CVD apparatus 1 Film formation method: PECVD (Plasma Enhanced Chemical Vapor Deposition) Plasma source: CCP (Capacitively Coupled Plasma) Electrode shape: Similar type (to the container shape) External RF electrode: Upper and lower 2-piece structure, no cooling mechanism Internal gas introduction electrode: φ6.35 mm, no heating mechanism Material: Aluminum alloy (external electrode), SUS304 (internal electrode) RF power supply: Frequency 13.56 MHz RF switch: For 2 channels Matching method: Automatic impedance matching Exhaust configuration: Mechanical booster pump (main pull), rotary pump (auxiliary) Exhaust manifold External dimensions: 350 mm x 350 mm x H150 mm

[0047] (Preparation 1 of a container for storing an oil or fat composition having a silicon oxide vapor-deposited film on its inner surface) A commercially available uncoated polyethylene terephthalate container for edible oils and fats (PET container: usable capacity 600 g, inner diameter of upper opening 27.6 mm, height 218.7 mm) was used as Comparative Example 1. The container of Comparative Example 1 was subjected to plasma treatment using plasma CVD apparatus 1 (details described above) under the film-forming conditions in Table 1, thereby coating the PET container with a silicon oxide vapor-deposited film, and these were used as container samples (samples of containers for storing an oil or fat composition) of Comparative Example 2 and Examples 1 to 3. The container samples of Comparative Example 2 and Examples 1 to 3 specifically used hexamethyldisiloxane (hereinafter sometimes referred to as HMDSO) or tetramethoxysilane (hereinafter sometimes referred to as TMOS) as the organosilicon compound. If necessary, oxygen (O) was mixed with the organosilicon compound as an oxidizing gas and used as a reaction gas. Argon (Ar) was also used as a discharge stabilizing gas, if necessary. First, the PET container was placed in the plasma treatment chamber of the plasma CVD apparatus 1. The pressure in the plasma treatment chamber was reduced to 1 Pa or less, and then the reactive gas and, optionally, a discharge stabilizing gas (Ar) were introduced into the plasma treatment chamber at the flow rates shown in Table 1. The pressure was stabilized to the pressure shown in Table 1 over 30 to 60 seconds. Discharge was then performed at the plasma output and for the time shown in Table 1 to coat the surface of the PET container with a silicon oxide vapor deposition film. After the discharge, the introduction of the reactive gas and optional discharge stabilizing gas was stopped, and the pressure in the film formation chamber was reduced to 1 Pa or less. The plasma treatment chamber was then opened to the atmosphere, and the PET container was removed from the plasma treatment chamber. Under the above conditions, multiple PET containers coated with a silicon oxide vapor deposition film were produced. Their ionic strength and ionic strength ratio, slipperiness, and residual grease content (reduced grease content) were analyzed and evaluated according to the following analytical methods. The analysis and evaluation results are shown in Tables 2 and 3.

[0048] [Analysis method] (Oil and fat sliding property 1) The containers (container samples) for storing the oil and fat compositions of the Examples and Comparative Examples were placed horizontally, and a drop (approximately 24.36 mg) of refined rapeseed oil ("Nissin Canola Oil" manufactured by Nisshin Oillio Group Co., Ltd. 99.9%) colored with carotene ("β-Carotene 30% FS" manufactured by DMS Co., Ltd.) was dropped onto the flat surface of the container from the opening of the container. The sample was immediately placed on a stage ("Stage (Angle Inclination)" manufactured by AS ONE Corporation) set at an inclination of 70° relative to the vertical direction, and the time it took for the rear end of the oil and fat droplet (the uppermost contact point between the sample surface and the oil and fat droplet on the inclined sample surface) to move 6 mm on the sample surface was measured. The temperature during measurement was room temperature (23 ° C.). Evaluation was performed based on the following criteria A to E according to the movement time, and if A to D, the oil and fat sliding property was considered to be good. Here, it can be determined that the shorter the transfer time, the better the oil / grease sliding property. A rating: 10 seconds or less B rating: more than 10 to 20 seconds C rating: more than 20 to 60 seconds D rating: more than 60 to 300 seconds E rating: more than 300 seconds

[0049] Reference (Effect of Presence or Absence of Carotene) A 2 cm square PET plate was cut from the flat portion of the container for storing the oil and fat composition of Example 1 to serve as a sample. The sample was placed on a stage ("Stage (Angle Inclination)" manufactured by AS ONE Corporation) set at a 70° inclination relative to the vertical direction. A mixture of refined rapeseed oil ("Nissin Canola Oil" manufactured by The Nisshin Oillio Group, Inc., 99.9% by mass) colored with carotene ("β-Carotene 30% FS" manufactured by DMS, 0.1% by mass) and refined rapeseed oil alone ("Nissin Canola Oil" manufactured by The Nisshin Oillio Group, Inc., 100% by mass) was dropped onto the sample surface using a dropper. The time it took for the rear end of the oil droplet (the uppermost point of contact between the sample surface and the oil droplet on the inclined sample surface) to move 6 mm across the sample surface was measured. The temperature during the measurement was room temperature (23°C). In both cases, the time was 5 seconds, the same as the result of Example 1 in Table 3. From these results, it was confirmed that there was no influence of the inclination of the sample or carotene when the rapeseed oil was applied to the sample surface.

[0050] (Reduction rate 1 of residual oil and fat amount) The containers for storing oil and fat compositions of the Examples and Comparative Examples were prepared as samples. After measuring the mass of the empty samples, the samples were filled with 600 g of rapeseed oil. Refined rapeseed oil ("Nissin Canola Oil" manufactured by The Nisshin Oillio Group, Inc.) was used as the rapeseed oil. The container was quickly tilted at an angle of 160° from the vertical to discharge the rapeseed oil. The time when the rapeseed oil began to discharge from the upper opening of the container was defined as 0 seconds, and 600 seconds later, the container was returned to its original tilt and the amount of rapeseed oil remaining in the container (residual oil and fat amount) was measured. The test was carried out at room temperature (23°C). When the residual oil and fat amount of the container for storing oil and fat compositions of Comparative Example 1 was defined as B (mass%) and the residual oil and fat amount of the containers for storing oil and fat compositions of each of the other Examples or Comparative Examples was defined as A (mass%), the reduction rate of the residual oil and fat amount was calculated using the following formula. Reduction rate of residual oil and fat amount (%) = (1 - A / B) x 100

[0051] (Surface Functional Group Analysis) Using a time-of-flight secondary ion mass spectrometer ("TOF.SIMS5" sold by Hitachi High-Tech Science Corporation, accelerating voltage 30 kV, measurement area: 500 μm square, primary ion source: Bi (bismuth)), the inner surfaces of the samples of containers for storing oil and fat compositions in the Examples and Comparative Examples were analyzed. From the ionic intensities of the obtained peaks, the ratio of the sum of ionic strength A and ionic strength AO to ionic strength S ((ionic strength A + ionic strength AO) / ionic strength S), the ratio of ionic strength A to ionic strength S (ionic strength A / ionic strength S), the ratio of ionic strength AO to ionic strength S (ionic strength AO / ionic strength S), the ratio of ionic strength AO to ionic strength A (ionic strength AO / ionic strength A), and the ratio of ionic strength AO to ionic strength B (ionic strength AO / ionic strength B) were calculated. The ion intensity (ion intensity) referred to here is a value dependent on the number of ions detected by time-of-flight secondary ion mass spectrometry (the value detected for each m / z ion). Ion intensity S is the intensity of the positive ion at m / z 43.97, ion intensity A is the sum of the intensities of the positive ions at m / z 43.00, m / z 59.03, and m / z 73.05, ion intensity AO is the sum of the intensities of the negative ions at m / z 31.02, m / z 59.00, m / z 74.99, m / z 102.97, and m / z 134.96, and ion intensity B is the sum of the intensities of the positive ions at m / z 78.99 and m / z 138.95.

[0052]

[0053]

[0054]

[0055] The sliding properties of Comparative Examples 1 and 2 were rated E, and the amount of oil remaining in the container after 600 seconds was about 1.5 g. On the other hand, the sliding properties of Examples 1 to 3 were rated A to C, and the amount of oil remaining was also reduced by 50% by mass or more compared to Comparative Example 1, which was good.

[0056] Comparative Examples 3-4 and Examples 4-5 Using the container for storing an oil and fat composition of Comparative Example 1, the amount of residual oil was measured by the above-mentioned method for measuring the reduction rate of the amount of residual oil, except that rapeseed oil was replaced with olive oil (extra virgin olive oil, manufactured by The Nisshin Oillio Group, Ltd.) (Comparative Example 3). Similarly, using the container for storing an oil and fat composition of Example 1, the amount of residual oil was calculated using olive oil (extra virgin olive oil, manufactured by The Nisshin Oillio Group, Ltd.), and the reduction rate of the amount of residual oil was calculated (calculated by replacing "Comparative Example 1" with "Comparative Example 3" in the above-mentioned "Reduction rate of residual oil amount 1") (Example 4). Furthermore, using the container for storing an oil and fat composition of Comparative Example 1, the amount of residual oil was measured by the above-mentioned method for measuring the reduction rate of residual oil, except that rapeseed oil was replaced with cottonseed oil (refined cottonseed oil, manufactured by The Nisshin Oillio Group, Ltd.) (Comparative Example 4). Furthermore, using the container for storing the oil and fat composition of Example 1, the amount of residual oil was measured in the same manner as above using cottonseed oil (refined cottonseed oil, manufactured by The Nisshin Oillio Group, Ltd.), and the reduction rate of the residual oil was calculated (calculated by replacing "Comparative Example 1" with "Comparative Example 4" in the above "Reduction rate of residual oil and fat amount 1") (Example 5). The results are shown in Table 4.

[0057] From the results in Table 4, it was confirmed that in Examples 4 and 5, which used the container of Example 1, the effect of reducing the amount of residual oil and fat was similarly achieved not only with rapeseed oil but also with other vegetable oils.

[0058] Comparative Example 5 and Examples 6 to 7 (Plasma CVD Apparatus 2) Plasma CVD apparatus 2 was used. The plasma CVD apparatus used was a model PD-220NL manufactured by Samco Inc. (RF power source: frequency 13.56 MHz), and the conditions were as shown in Table 5.

[0059]

[0060] (Preparation 2 of a container for storing an oil or fat composition having a silicon oxide vapor deposition film on its surface) A commercially available uncoated polyethylene film (low-density PE film: 100 μm thick, manufactured by Toshin Scientific Industry Co., Ltd.) used for pillow (bag) containers was cut into a 14 cm square, which was designated Comparative Example 5. An evaluation sample treated in the same manner as in Comparative Example 5 was coated with a silicon oxide vapor deposition film using the above-mentioned plasma CVD apparatus 2 under the conditions shown in Table 5, which was designated Example 6. Specifically, the film sample of Example 6 used tetraethoxysilane (hereinafter, TEOS) as the organosilicon compound. Oxygen (O) was used as the oxidizing gas. Helium (He) was used as the carrier gas for TEOS as necessary. First, the film sample was set in the load lock chamber of plasma CVD apparatus 2. After the load lock chamber was depressurized, the film sample was moved to the plasma treatment chamber, and the pressure in the plasma treatment chamber was then reduced to 3×10 ―3 The pressure was reduced to 0.2 Pa or less. Thereafter, the oxidizing gas was introduced into the plasma treatment chamber at a flow rate shown in Table 5, and the pressure was stabilized at the pressure shown in Table 5 over 60 to 90 seconds. Then, the organosilicon compound was introduced into the plasma treatment chamber at a flow rate shown in Table 5, and the pressure was again stabilized at the pressure shown in Table 5 over 60 seconds. Thereafter, discharge was carried out at the plasma output shown in Table 5 for the time shown in Table 5, thereby coating a silicon oxide vapor-deposited film on the surface of the film sample. After the discharge, the introduction of the organosilicon compound and oxidizing gas was stopped, and the pressure in the film formation chamber was reduced to 4 x 10 ―3After the pressure was reduced to or below Pa, the film sample was moved to a load lock chamber, which was then opened to the atmosphere and the film sample was removed from the load lock chamber. An evaluation sample treated in the same manner as in Comparative Example 5 was coated with a silicon oxide vapor deposition film using the plasma CVD apparatus 1 used in Example 1 under the film formation conditions of Example 1 in Table 1, to give Example 7. The conditions for the plasma CVD apparatus 1 used were changed to the following conditions for coating. Film formation method: PECVD (Plasma Enhanced Chemical Vapor Deposition) Plasma source: CCP (Capacitively Coupled Plasma) Electrode shape: Parallel plate type, electrode distance 50 mm External RF electrode: SUS304 (lower electrode), aluminum alloy + SUS304 (upper electrode) Lower RF electrode: Φ320 mm, water-cooled Upper gas shower electrode: Φ320 mm, heated Internal gas introduction electrode: Φ6.35 mm, no heating mechanism Materials: Aluminum alloy (external electrode), SUS304 (internal electrode) RF power supply: Frequency 13.56 MHz RF switch: For 2 channels Matching method: Automatic impedance matching Exhaust configuration: Mechanical booster pump (main exhaust), rotary pump (auxiliary) Exhaust manifold External dimensions: 350 mm x 350 mm x H150 mm

[0061] The resulting oil-removal properties of Comparative Example 5, Examples 6, and 7 were analyzed and evaluated. The films were also molded into pillow shapes (dimensions: width 7 cm, height 14 cm, opening dimensions: circumference 13 cm), and the reduction rate of residual oil was evaluated according to the following method. The results of the analysis and evaluation are shown in Table 6.

[0062] [Analysis method] (Oil and fat sliding property 2) On the film used as the starting material in the above "Preparation 2 of an oil and fat composition storage container having a silicon oxide vapor-deposited film on its surface," a drop (approximately 24.36 mg) of refined rapeseed oil ("Nissin Canola Oil" manufactured by Nisshin Oillio Group Co., Ltd., 99.9%) colored with carotene ("β-Carotene 30% FS" manufactured by DMS, 0.1%) was dropped with a dropper. The sample was immediately placed on a stage ("Stage (angle tilt)" manufactured by AS ONE Corporation) tilted at 70° to the vertical direction, and the time it took for the rear end of the oil and fat droplet (the uppermost contact point between the sample surface and the oil and fat droplet on the inclined sample surface) to move 6 mm on the sample surface was measured. The temperature during the measurement was room temperature (23 ° C.). The transfer time was evaluated based on the following criteria A to E, with A to D being considered to have oil-sliding properties and / or oil-repellent effects. Here, the shorter the transfer time, the higher the oil-sliding properties and / or oil-repellent effects, and the better the result can be judged to be. A: Within 10 seconds B: Over 10 to 20 seconds C: Over 20 to 60 seconds D: Over 60 to 300 seconds E: Over 300 seconds

[0063] (Reduction ratio 2 of residual oil and fat amount) After measuring the mass of an empty sample of a pillow-shaped film (commercially available polyethylene film (low-density PE film: thickness 100 μm, manufactured by Toshin Scientific Industry Co., Ltd., dimensions: width 7 cm, height 14 cm, opening dimensions: circumference 13 cm), 50 g of rapeseed oil was filled. Refined rapeseed oil ("Nissin Canola Oil" manufactured by The Nisshin Oillio Group, Inc.) was used as the rapeseed oil. The film was quickly tilted at an angle of 180° from the vertical, and the rapeseed oil was allowed to flow through the pillow-shaped film. The rapeseed oil was discharged from the opening. The time when the rapeseed oil started to be discharged from the opening at the top end of the pillow-shaped film was defined as 0 seconds, and 90 seconds after that, the tilt was returned to its original position and the amount of rapeseed oil remaining in the pillow-shaped film (amount of residual oil and fat) was measured. The test was carried out at room temperature (23°C). When the amount of residual oil and fat in the container for storing an oil and fat composition of Comparative Example 5 was defined as B (% by mass) and the amount of residual oil and fat in the pillow-shaped films of each of the other Examples was defined as A (% by mass), the reduction rate of the amount of residual oil and fat was calculated using the following formula: Reduction rate (%) of residual oil and fat amount = (1 - A / B) x 100

[0064]

[0065] Glass Metal Examples (Preparation of Silicon Oxide Vapor Deposition Film and Container for Storage of Oil and Fat Composition) A glass Petri dish (Petri dish, manufactured by Kenis, product number: NOR-100, dimensions: diameter 100 mm, height 16 mm) and a metal stainless steel Petri dish (manufactured by Kenis, dimensions: diameter 90 mm, height 20 mm) were designated Comparative Examples 6 and 7, respectively. The Petri dishes of Comparative Examples 6 and 7 were coated with a silicon oxide vapor deposition film by plasma treatment using the same equipment and film formation conditions as in Example 7, and designated Examples 8 and 9, respectively. Petri dishes coated with a silicon oxide vapor deposition film were produced under the above conditions, and the oil sliding property and the amount of residual oil (reduction rate of residual oil) were analyzed and evaluated. The results of the analysis and evaluation are shown in Table 7.

[0066] [Analysis method] (Oil sliding property 3) On the bottom surface of the petri dishes of Comparative Examples 6 and 7 and Examples 8 and 9 above, one drop (approximately 24.36 mg) of refined rapeseed oil ("Nissin Canola Oil" manufactured by Nisshin Oillio Group Co., Ltd. 99.9%) colored with carotene ("β-Carotene 30% FS" manufactured by DMS Co., Ltd.) was dropped with a dropper. The sample was immediately placed on a stage set at an inclination of 70 ° relative to the vertical direction ("Stage (angle tilt)" manufactured by AS ONE Corporation), and the time it took for the rear end of the oil droplet (the uppermost contact point between the sample surface and the oil droplet on the inclined sample surface) to move 6 mm on the sample surface was measured. The temperature during measurement was room temperature (23 ° C.). Evaluation was performed based on the following criteria A to E depending on the movement time, and if A to D, it was determined that the oil had sliding property and / or oil repellency. Here, the shorter the transfer time, the higher the oil sliding property and / or oil repellency effect, and the better it can be judged to be. A rating: 10 seconds or less B rating: more than 10 seconds to 20 seconds C rating: more than 20 seconds to 60 seconds D rating: more than 60 seconds to 300 seconds E rating: more than 300 seconds

[0067] (Reduction rate 3 of residual oil amount) 50 g of rapeseed oil was filled into the petri dishes of Comparative Examples 6 and 7 and Examples 8 and 9. Refined rapeseed oil ("Nissin Canola Oil" manufactured by The Nisshin Oillio Group, Inc.) was used as the rapeseed oil. The petri dish was quickly tilted so that the bottom was angled 45° downward from perpendicular to the ground, and the rapeseed oil was discharged. The time when the rapeseed oil began to be discharged from the upper opening of the petri dish was defined as 0 seconds, and 90 seconds later, the tilt was returned to its original position and the amount of rapeseed oil remaining in the petri dish (residual oil amount) was measured. The test was performed at room temperature (23°C). When the amount of residual oil in the container for storing an oil and fat composition of Comparative Example 6 was defined as B (% by mass) and the amount of residual oil in the petri dish of Example 8 was defined as A (% by mass), the reduction rate of the residual oil amount was calculated using the following formula. Similarly, the amount of residual oil and fat in the container for storing the oil and fat composition of Comparative Example 7 was designated B (% by mass), and the amount of residual oil and fat in the Petri dish of Example 9 was designated A (% by mass). Similarly to the above, the reduction rate of the amount of residual oil and fat was calculated using the following formula: Reduction rate of residual oil and fat amount (%) = (1 - A / B) x 100

[0068]

Claims

1. A container for storing an oil and fat composition, having a silicon oxide vapor deposition film on its inner surface, wherein the sliding property of oil and fat on the inner surface of the container is within 300 seconds, as defined below. Sliding property of oil and fat: The time (seconds) for a 24±0.5 mg droplet of rapeseed oil to move 6 mm on a sample surface inclined at 70° to the vertical at 23±3°C.

2. A container for storing an oil-and-fat composition according to claim 1, wherein a reduction ratio of the amount of residual oil and fat in the container for storing an oil-and-fat composition according to the following definition is 20% by mass or more. Reduction ratio of residual oil and fat: when the oil-and-fat composition filled in the container for storing an oil-and-fat composition is discharged from an opening of the container by tilting the container at 160° with respect to the vertical, the amount of the oil-and-fat composition remaining in the container 600 seconds after the oil-and-fat composition starts to be discharged from the container is defined as a residual oil and fat amount A (mass %), and the amount of the oil-and-fat composition remaining in a container identical to the container for storing an oil-and-fat composition except that it does not have a silicon oxide vapor-deposited film on its inner surface is measured and defined as a residual oil and fat amount B (mass %), a value that satisfies the following formula: reduction ratio (%) of residual oil and fat amount=(1-A / B)×100.

3. A container for storing an oil or fat composition according to claim 1 or 2, which is made of a material selected from the group consisting of resin, glass, paper and metal.

4. The container for storing an oil or fat composition according to any one of claims 1 to 3, wherein the silicon oxide vapor-deposited film is a film formed by vapor-depositing hexamethyldisiloxane.

5. A container for storing an oil or fat composition according to any one of claims 1 to 4, in which an oil or fat composition is stored.

Images