Plant-based foamable oil-in-water emulsion

Abstract

To provide a plant-based foamable oil-in-water emulsion having good foaming properties, in which the emulsifier content is 2 mass% or less.SOLUTION: By incorporating, into a foamable oil-in-water emulsion, both an oat-derived oil and a stearic acid-containing fat or oil containing 20 mass% or more of stearic acid in its constituent fatty acids, a plant-based foamable oil-in-water emulsion can be obtained which exhibits good foaming properties even though it is produced solely from plant-derived materials and has an emulsifier content of 2 mass% or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a plant-based foaming oil-in-water emulsion. [Background technology]

[0002] Against the backdrop of depletion of animal resources and environmental conservation, the development of plant-based products that partially or completely replace animal ingredients is progressing. In addition, with consumers becoming more interested in the labeling of ingredients in products, there is an increasing demand for "clean labels" that minimize the number of ingredients used and use easy-to-understand ingredients. Creams and foaming oil-in-water emulsions are also being developed with this trend in mind.

[0003] In general creams and foaming oil-in-water emulsions, the milk protein casein contributes to emulsification, so when animal ingredients such as milk are not used, a technique to supplement this emulsifying function is required. One such technique is disclosed in Patent Document 1, which uses cocoa butter, specific fats and oils, and partial hydrolysis products of vegetable protein materials instead of milk-derived ingredients.

[0004] Furthermore, in the development of oil-in-water emulsions that claim to be vegetable-based, a vegetable oil-in-water emulsion containing a nut or seed paste is disclosed in Patent Document 2. Patent Document 3 discloses a protein-free vegetable whipping cream that contains fat, an anionic emulsifier, and low-viscosity hydroxypropyl methylcellulose.

[0005] Furthermore, synthetic emulsifiers are often used as emulsifiers when preparing oil-in-water emulsions, and Patent Document 4 discloses that polar oils such as oat oil can be used to prepare highly stable oil-in-water emulsions that do not require synthetic emulsifiers. [Prior art documents] [Patent documents]

[0006] [Patent Document 2] Japanese Patent Application Publication No. 2020-115854 [Patent Document 1] Japanese Patent Publication No. 2022-152117 [Patent Document 3] Special Publication No. 2020-531033 [Patent Document 4] International Publication No. 2019 / 224168 Summary of the Invention [Problem to be solved by the invention]

[0007] Patent Documents 2 and 4 do not disclose or suggest foamable oil-in-water emulsions. Furthermore, Patent Documents 1 and 3 disclose oil-in-water emulsions with good foaming properties, but some of them use an emulsifier. It was considered necessary to provide a means for producing such emulsions without using an emulsifier, which is also compatible with clean label applications.

[0008] Therefore, an object of the present invention is to provide a plant-based foamable oil-in-water emulsion that has an emulsifier content of 2% by mass or less and has good foaming properties. [Means for solving the problem]

[0009] The present inventors have conducted studies and found that when a specific fat or oil is blended with an oat-derived oil in a foamable oil-in-water emulsion, a plant-based foamable oil-in-water emulsion with good foaming properties can be obtained, even though the emulsion is produced using only plant materials and has an emulsifier content of 2% by mass or less, and thus completed the present invention.

[0010] That is, the present invention is [1] A plant-based foamable oil-in-water emulsion containing an emulsifier content of 2% by mass or less and containing a plant protein material, a plant-based foamable oil-in-water emulsion containing a stearic acid-containing oil containing 20% ​​by mass or more of stearic acid among its constituent fatty acids, and oat-derived oil; [2] The plant-based foamable oil-in-water emulsion according to [1], wherein the total content of unsaturated fatty acids in the constituent fatty acids of the stearic acid-containing oil or fat is 25 to 75% by mass. Unsaturated fatty acids include oleic acid, linoleic acid, and linolenic acid. [3] The plant-based foamable oil-in-water emulsion according to [1] or [2], wherein the content ratio of linoleic acid to oleic acid (linoleic acid / oleic acid content ratio) in the constituent fatty acids of the stearic acid-containing oil or fat is 0.03 or more. [4] The plant-based foamable oil-in-water emulsion according to [1] or [2], wherein the content of S2U triglyceride in the constituent triglycerides of the stearic acid-containing oil or fat is 5 to 88 mass%. S refers to saturated fatty acids with 16 to 22 carbon atoms, and U refers to unsaturated fatty acids with 18 carbon atoms, including oleic acid, linoleic acid, and linolenic acid. S2U is a triglyceride in which two S molecules and one U molecule are bonded. [5] The plant-based foamable oil-in-water emulsion according to [3], wherein the content of S2U triglyceride in the constituent triglycerides of the stearic acid-containing oil or fat is 5 to 88 mass%. S refers to saturated fatty acids with 16 to 22 carbon atoms, and U refers to unsaturated fatty acids with 18 carbon atoms, including oleic acid, linoleic acid, and linolenic acid. S2U is a triglyceride in which two S molecules and one U molecule are bonded. [6] The plant-based foamable oil-in-water emulsion according to [1] or [2], wherein the raw materials of the plant-based foamable oil-in-water emulsion do not contain animal materials. [7] The plant-based foamable oil-in-water emulsion according to [3], wherein the raw materials of the plant-based foamable oil-in-water emulsion do not contain animal materials. [8] The plant-based foamable oil-in-water emulsion according to [4], wherein the raw materials of the plant-based foamable oil-in-water emulsion do not contain animal materials. [9] The plant-based foamable oil-in-water emulsion according to [5], wherein the raw materials of the plant-based foamable oil-in-water emulsion do not contain animal materials.

[10] A method for producing a plant-based foamable oil-in-water emulsion containing a plant protein material and having an emulsifier content of 2% by mass or less, comprising: A method for producing a plant-based foamable oil-in-water emulsion, the method comprising: a stearic acid-containing oil containing 20% ​​by mass or more of stearic acid among constituent fatty acids; and an oat-derived oil in an oil phase of the emulsion; It is related to. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a plant-based foamable oil-in-water emulsion that has good foaming properties despite having an emulsifier content of 2% by mass or less. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be specifically described below.

[0013] A typical foamable oil-in-water emulsion is composed of an oil-in-water emulsion of fats, proteins, water, etc., in combination with an emulsifier, and is also called whipping cream. When this is stirred to incorporate air using a whisk or a dedicated mixer, it becomes what is called whipped cream or whipped cream. Note that before being stirred to incorporate air using a whisk or a dedicated mixer, the foamable oil-in-water emulsion of the present invention is distributed, stored, and sold in an unfoamed liquid state.

[0014] Many foamable oil-in-water emulsions are commercially available, typically using dairy ingredients containing casein, such as milk fat and fresh cream. Animal fats such as beef tallow and lard, as well as animal-derived carbohydrate materials, are also sometimes used in typical foamable oil-in-water emulsions. Foamable oil-in-water emulsions using such animal ingredients are known to have good foaming properties. The plant-based foamable oil-in-water emulsion of the present invention may contain less than 50% by weight of animal ingredients. More preferably, the animal ingredients are present in an amount of 40% by weight or less, 35% by weight or less, 30% by weight or less, 25% by weight or less, 20% by weight or less, 15% by weight or less, 10% by weight or less, 7% by weight or less, 5% by weight or less, 3% by weight or less, 1% by weight or less, or 0% by weight. Most preferably, the plant-based foamable oil-in-water emulsion contains 0% by weight of animal ingredients. That is, it is preferable that the plant-based foamable oil-in-water emulsion does not contain any animal-derived materials as ingredients.

[0015] The plant-based foaming oil-in-water emulsion of the present invention has an emulsifier content of 2% by mass or less in the raw materials. More preferably, it is 1.5% by mass or less, 1% by mass or less, 0.5% by mass or less, or 0% by mass. An emulsifier content of 2% by mass or less can be defined as substantially containing no emulsifier. Even more preferably, the raw materials do not contain any emulsifier. The emulsifier referred to here is not particularly limited as long as it is an emulsifier generally used in the production of edible emulsions. Specific examples include lecithin, enzymatically hydrolyzed lecithin, glycerin fatty acid esters, organic acid monoglycerides, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyglycerin condensed ricinoleic acid esters, sorbitan fatty acid esters, sucrose fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polysorbates, etc.

[0016] The plant-based foamable oil-in-water emulsion of the present invention can be used with food additives, flavorings, colorings, seasonings, preservatives, etc., even if they are made from animal-derived raw materials, as long as the effects of the present invention are not impaired. It is more preferable that these materials are also plant-derived.

[0017] Stearic acid-containing fats and oils The plant-based foamable oil-in-water emulsion of the present invention contains a stearic acid-containing oil or fat containing 20% ​​by mass or more of stearic acid among its constituent fatty acids. More preferably, the lower limit of the stearic acid content is 23% by mass or more, 25% by mass or more, 30% by mass or more, or 35% by mass or more. Even more preferably, the upper limit is 70% by mass or less, or 65% by mass or less. By using a stearic acid-containing oil or fat within this range, a plant-based foamable oil-in-water emulsion with good physical properties and an emulsifier content of 2% by mass or less can be obtained. Stearic acid is a saturated fatty acid having 18 carbon atoms.

[0018] The stearic acid-containing fat is preferably contained in the oil phase of the plant-based foamable oil-in-water emulsion in an amount of 3 to 35% by mass. More preferably, the lower limit is 4% by mass or more, 5% by mass or more, or 6% by mass or more. More preferably, the upper limit is 33% by mass or less, 30% by mass or less, 28% by mass or less, or 26% by mass or less. By containing the stearic acid-containing fat in this range in the plant-based foamable oil-in-water emulsion, a plant-based foamable oil-in-water emulsion with an emulsifier content of 2% by mass or less and excellent physical properties can be obtained.

[0019] The stearic acid-containing oil preferably has a total content of unsaturated fatty acids in the constituent fatty acids of 25 to 75% by mass. More preferably, the lower limit is 30% by mass or more, or 35% by mass or more. More preferably, the upper limit is 72% by mass or less, or 70% by mass or less. By including the stearic acid-containing oil in this range in the plant-based foamable oil-in-water emulsion, a plant-based foamable oil-in-water emulsion with good physical properties and an emulsifier content of 2% by mass or less can be obtained. Note that the unsaturated fatty acids refer to oleic acid, linoleic acid, and linolenic acid.

[0020] The stearic acid-containing fat or oil preferably has a ratio of linoleic acid to oleic acid (linoleic acid / oleic acid content ratio) in the constituent fatty acids of 0.03 or more. More preferably, the lower limit is 0.05 or more, 0.1 or more, or 0.5 or more. Even more preferably, the upper limit is 4 or less, 3.5 or less, or 3.2 or less. By using fat or oil within this range, a plant-based foamable oil-in-water emulsion with an emulsifier content of 2% by mass or less and excellent physical properties can be obtained. Note that oleic acid is an unsaturated fatty acid with 18 carbon atoms and a degree of unsaturation of 1, and linoleic acid is an unsaturated fatty acid with 18 carbon atoms and a degree of unsaturation of 2.

[0021] The stearic acid-containing oil or fat preferably has a content ratio of stearic acid to palmitic acid (stearic acid / palmitic acid content ratio) in the constituent fatty acids of 3 or more and 30 or less. More preferably, the lower limit is 4 or more, or 5 or more. Even more preferably, the upper limit is 25 or less, or 20 or less. When the content is within this range, a plant-based foamable oil-in-water emulsion with good physical properties and an emulsifier content of 2% by mass or less can be obtained. Palmitic acid is a saturated fatty acid with 16 carbon atoms.

[0022] The palmitic acid content of the stearic acid-containing oil or fat among the constituent fatty acids is preferably 20% by mass or less. More preferably, the upper limit is 15% by mass or less, or 10% by mass or less. More preferably, the lower limit is 1% by mass or more, or 2% by mass or more. Furthermore, by keeping the content within this range, a plant-based foamable oil-in-water emulsion with good physical properties and an emulsifier content of 2% by mass or less can be obtained.

[0023] The stearic acid-containing oil preferably has a linoleic acid content of 2% by mass or more among the constituent fatty acids. More preferably, the lower limit is 2.5% by mass or more, 3% by mass or more, or 5% by mass or more. Even more preferably, the upper limit is 50% by mass or less, 45% by mass or less, or 40% by mass or less. By using an oil within this range, a plant-based foamable oil-in-water emulsion with good physical properties and an emulsifier content of 2% by mass or less can be obtained.

[0024] The stearic acid-containing oil preferably has an S2U triglyceride content of 5 to 88% by mass among its constituent triglycerides. More preferably, the lower limit is 7% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, or 40% by mass or more. Furthermore, the upper limit is more preferably 85% by mass or less, 80% by mass or less, or 75% by mass or less. By using an oil or fat within this range, a plant-based foamable oil-in-water emulsion with excellent physical properties can be obtained, with an emulsifier content of 2% by mass or less. Here, S represents a saturated fatty acid having 16 to 22 carbon atoms, and U represents an unsaturated fatty acid having 18 carbon atoms, including oleic acid, linoleic acid, and linolenic acid. S2U is a triglyceride in which two S molecules and one U molecule are bonded.

[0025] The stearic acid-containing oil preferably has an SU2 triglyceride content of 6 to 60% by mass in the constituent triglycerides. More preferably, the lower limit is 8% by mass or more, 10% by mass or more, or 15% by mass or more. Also, more preferably, the upper limit is 55% by mass or less, 50% by mass or less, 45% by mass or less, or 40% by mass or less. By using an oil within this range, an emulsifier content is 2% by mass or less, and a plant-based foamable oil-in-water emulsion with good physical properties can be obtained. Note that SU2 is a triglyceride in which one S molecule and two U molecules are bonded.

[0026] The stearic acid-containing oil preferably has a St2U triglyceride content of 3 to 80% by mass in the constituent triglycerides. More preferably, the lower limit is 3.5% by mass or more, 5% by mass or more, 10% by mass or more, 20% by mass or more, or 30% by mass or more. Furthermore, the upper limit is more preferably 75% by mass or less, or 70% by mass or less. By using an oil or fat within this range, a plant-based foamable oil-in-water emulsion with excellent physical properties and an emulsifier content of 2% by mass or less can be obtained. Here, St refers to stearic acid, a saturated fatty acid with 18 carbon atoms. St2U is a triglyceride in which two molecules of St and one molecule of U are bonded.

[0027] As long as the stearic acid-containing oils and fats satisfy the above-mentioned conditions, one or more kinds of oils and fats can be used as raw materials. Examples of such oils and fats include vegetable oils and fats that are commonly used for food, such as soybean oil, rapeseed oil, corn oil, cottonseed oil, peanut oil, sunflower oil, rice oil, safflower oil, olive oil, sesame oil, palm oil, coconut oil, palm kernel oil, medium-chain triglyceride (MCT), shea butter, and sal fat, as well as processed oils and fats obtained by fractionating, hydrogenating, interesterifying, or the like, and further mixtures of these oils and fats.

[0028] A preferred embodiment of the stearic acid-containing oil is an oil that has been subjected to interesterification. The interesterification method may be interesterification using a chemical catalyst or an enzyme. The interesterification may be random or regiospecific. Examples of the chemical catalyst include sodium methylate, and examples of the enzyme include regiospecific lipase and regiononspecific lipase. When the stearic acid-containing oil is an interesterified oil, a plant-based foamable oil-in-water emulsion with good physical properties and an emulsifier content of 2% by mass or less can be obtained.

[0029] ◆Oat oil The plant-based foaming oil-in-water emulsion of the present invention contains oat-derived oil. Oat is a grain called oats, barley, or oats. Oat-derived oil is an oil extracted from oats and rich in glycolipids, a type of polar lipid. Commercially available oat-derived oils can be used, such as "SWEOAT OIL PL40FG" manufactured by Swedish Oat Fiber AB.

[0030] The oat-derived oil is preferably contained in the oil phase of the plant-based foamable oil-in-water emulsion at 0.1 to 3% by mass. More preferably, the lower limit is 0.2% by mass or more, 0.4% by mass or more, or 0.5% by mass or more. Also, more preferably, the upper limit is 2.5% by mass or less, 2% by mass or less, or 1.5% by mass or less. By containing the oat-derived oil in this range in the plant-based foamable oil-in-water emulsion, a plant-based foamable oil-in-water emulsion with an emulsifier content of 2% by mass or less and excellent physical properties can be obtained.

[0031] The oil phase of the plant-based foamable oil-in-water emulsion of the present invention may contain oils other than the stearic acid-containing oils described above. Examples of the oils include vegetable oils that are commonly used for food, such as soybean oil, rapeseed oil, canola oil, safflower oil, sunflower oil, rice bran oil, corn oil, cottonseed oil, peanut oil, kapok oil, olive oil, palm oil, palm kernel oil, and coconut oil, as well as hardened, fractionated, or interesterified versions of these oils. One or more of these oils may also be used.

[0032] The oil phase content of the plant-based foamable oil-in-water emulsion of the present invention, as a lipid content including lipids contained in raw materials other than the stearic acid-containing oil and fat and the oils other than the stearic acid-containing oil and fat, is 8% by mass or more, 10% by mass or more, 12% by mass or more, 15% by mass or more, or 18% by mass or more, and further is 60% by mass or less, 55% by mass or less, 50% by mass or less, or 45% by mass or less.

[0033] ◆Protein material The plant-based foamable oil-in-water emulsion of the present invention contains a vegetable protein material. Specific examples of the protein material source include soybeans, peas, mung beans, chickpeas, pinto beans, coffee beans, pistachios, coconuts, sesame seeds, almonds, peanuts, macadamia nuts, hazelnuts, cashew nuts, walnuts, chestnuts, sunflower seeds, and potatoes. The vegetable protein material is preferably derived from one or more sources selected from the group consisting of beans, nuts, and nuts, more preferably from one or more sources selected from soybeans, peas, mung beans, chickpeas, coconuts, sesame seeds, and almonds, even more preferably from soybean protein material and / or pea protein material, and most preferably from soybean protein material. The vegetable protein material is more preferably a partially hydrolyzed product of the vegetable protein material.

[0034] The protein material contained in the plant-based foamable oil-in-water emulsion is preferably 0.2 to 15% by mass, calculated as solids, of the plant-based foamable oil-in-water emulsion. It is more preferably 0.3 to 12% by mass, or 0.4 to 10% by mass. The protein material can be used as a powder, or after adding water to the powder. The protein material can also be used in a liquid state without being converted into a powder. Specific examples include soy milk, low-fat soy milk, and soy milk cream, which has a higher lipid content than soy milk. In either case, by blending the amount equivalent to the above-mentioned solids, a plant-based foamable oil-in-water emulsion with an emulsifier content of 2% by mass or less and excellent physical properties can be obtained.

[0035] Phosphate and / or citrate The plant-based foaming oil-in-water emulsion of the present invention may or may not contain phosphate and / or citrate. Preferably, the plant-based foaming oil-in-water emulsion does not contain phosphate and / or citrate. Here, "not containing phosphate and / or citrate" means that phosphate and / or citrate are not intentionally contained in the foaming oil-in-water emulsion, and means that phosphate and / or citrate are not contained in the emulsion other than those that are inevitably mixed in due to the raw materials used.

[0036] ◆Other ingredients In addition to the above, the plant-based foaming oil-in-water emulsion of the present invention may contain appropriate ingredients such as fragrances, thickening polysaccharides, gelling agents, salts, pH adjusters, and sugars, as long as the effects of the present invention are not impaired.

[0037] ◆Example of manufacturing a plant-based foaming oil-in-water emulsion The plant-based foamable oil-in-water emulsion of the present invention can be produced by a known method for producing a foamable oil-in-water emulsion. For example, an oil phase is produced by dissolving a stearic acid-containing oil, an oat-derived oil, and, if necessary, other oils and fats and oil-soluble materials. Separately, a water-soluble raw material is dissolved in water to produce an aqueous phase. The oil phase is added to the aqueous phase while stirring with a homogenizer or the like to produce an oil-in-water emulsion (pre-emulsification step). The resulting oil-in-water emulsion is further homogenized with a high-pressure homogenizer or the like (homogenization step). After that, the emulsion is subjected to heat sterilization (heat sterilization step), followed by cooling, aging, and other steps to obtain a plant-based foamable oil-in-water emulsion. The homogenization step may be carried out again after the heat sterilization step, or it may be carried out only after the heat sterilization step.

[0038] In the present invention, there are two types of sterilization treatment for foamable oil-in-water emulsions: indirect heating and direct heating. Examples of indirect heating treatment equipment include the APV plate-type UHT treatment equipment (manufactured by APV Corporation), the CP-UHT sterilizer (manufactured by Climati Package Co., Ltd.), the Stork tubular sterilizer (manufactured by Stork Corporation), and the Contherm scraping-type UHT sterilizer (manufactured by Tetra Pak Alfa Laval Co., Ltd.), but these are not the only examples. Examples of direct heating sterilization equipment include the ultra-high temperature sterilizer (manufactured by Iwai Kikai Kogyo Co., Ltd.), the Uperization sterilizer (manufactured by Tetra Pak Alfa Laval Co., Ltd.), the VTIS sterilizer (manufactured by Tetra Pak Alfa Laval Co., Ltd.), the Lagier UHT sterilizer (manufactured by Lagier Co., Ltd.), and the Paralyzator (manufactured by Pasch & Silkeborg Co., Ltd.), and any of these equipment may be used.

[0039] The plant-based foaming oil-in-water emulsion of the present invention has excellent emulsification stability as a sterile filled product when aseptically filled into a showley pack or the like in a liquid state after the above sterilization treatment.

[0040] The plant-based foamable oil-in-water emulsion obtained through the above steps can be further subjected to a whipping step to prepare whipped cream (whipped cream). In the whipping step, the emulsion obtained in the emulsification step is partially demulsified and the composition is aerated, thereby obtaining whipped cream. The plant-based foamable oil-in-water emulsion of the present invention includes both the state before foaming and the state after foaming.

[0041] The whipped vegetable-based foaming oil-in-water emulsion can be used as a filling, sandwich, topping, coating, and the like. The whipped plant-based foaming oil-in-water emulsion can be consumed either refrigerated or frozen, or can be frozen and then thawed before consumption.

[0042] The plant-based foaming oil-in-water emulsions of the present invention can be used in foamed and / or non-foamed liquid forms in ice creams, drinks, cakes, confectioneries, etc. [Example]

[0043] The present invention will be described in more detail below.

[0044] The fatty acid and triglyceride contents of the oils and fats used in the study are shown in Table 1. All oils and fats used were manufactured by Fuji Oil Co., Ltd. The fatty acid and triglyceride contents were measured as follows. The fatty acid content was measured according to AOCS Official Method Ce 1h-05. The triglyceride content was measured by high-performance liquid chromatography (column: ODS, eluent: acetone / acetonitrile = 80 / 20, liquid volume: 0.9 ml / min, column temperature: 25°C, detector: differential refractometer).

[0045] Stearic acid-containing fats and oils 1 20 parts of safflower oil and 80 parts of stearic acid were mixed and transesterified using a 1,3-position specific enzyme. After that, the fatty acids were distilled off, and the resulting mixture was bleached and deodorized in the usual way to obtain stearic acid-containing oil 1.

[0046] Stearic acid-containing fats and oils 2 20 parts of shea butter and 80 parts of acetone were mixed and stirred at 27.5 ° C for 30 minutes to precipitate gums. The mixture was then left to stand, and the precipitated gums were filtered to obtain degummed shea butter. Next, 18.5 parts of degummed shea butter and 81.5 parts of acetone were mixed, and the temperature was gradually lowered with weak stirring. When the temperature reached 2.5 ° C, the mixture was maintained at a constant temperature for 30 minutes, and the resulting mixture was filtered to obtain a liquid fraction. This liquid fraction was bleached and deodorized according to conventional methods, and the resulting product was designated stearic acid-containing fats and oils 2.

[0047] Stearic acid-containing fats and oils 3 The mixed liquid produced with stearic acid-containing fat 2 was filtered, and the solid portion was bleached and deodorized in a conventional manner to obtain a product designated as stearic acid-containing fat 3.

[0048] Palmitic acid-containing oils and fats Palm oil (100 parts) was fractionated twice to obtain a mid-melting point fraction, which was then bleached and deodorized in the usual manner to obtain a palmitic acid-containing oil.

[0049] [Table 1] TIFF2025151959000001.tif80169

[0050] ·S refers to saturated fatty acids with 16 to 22 carbon atoms, U refers to unsaturated fatty acids with 18 carbon atoms, such as oleic acid, linoleic acid, and linolenic acid, and St refers to stearic acid. S2U refers to a triglyceride in which two S molecules and one U molecule are bonded, and SU2 refers to a triglyceride in which one S molecule and two U molecules are bonded. St2U refers to a triglyceride containing two molecules of stearic acid and one molecule of U.

[0051] According to the formulations in Table 2, each plant-based foamable oil-in-water emulsion was obtained by the following "Production method of plant-based foamable oil-in-water emulsion".

[0052] ■Method for manufacturing plant-based foaming oil-in-water emulsion 1. The raw materials in Table 2 "Oil phase" were mixed and dissolved to form the oil phase. 2. The ingredients in Table 2 "Aqueous phase" were mixed to form the aqueous phase. 3. The oil phase from 1 and the water phase from 2 were mixed in an emulsification tank and pre-emulsified, then homogenized at a homogenization pressure of 4 MPa. 4. Then, using an ultra-high temperature sterilizer (manufactured by Iwai Machinery Industry Co., Ltd.), the mixture was sterilized using direct heating at 140-148°C for 4-8 seconds, and then immediately cooled to obtain each plant-based foaming oil-in-water emulsion.

[0053] The raw materials used are as follows: Palm kernel oil: "Refined palm kernel oil" manufactured by Fuji Oil Co., Ltd. (stearic acid content: 2.3% by mass) Palm kernel oil: Fuji Oil Co., Ltd.'s "Numeraline 38" (stearic acid content: 18.4% by mass) Interesterified oil: "Melanosand 38" manufactured by Fuji Oil Co., Ltd. (stearic acid content: 5.2% by mass) Oat-derived oil: Swedish Oat Fiber AB "SWEOAT OIL PL40FG" Powdered soy protein: Fuji Oil Co., Ltd.'s "New Fujipro 1900" (protein: 83.3%, moisture: 5.5%) Low-fat soy milk: "Umai Nen" (protein: 5.3%, moisture: 90.2%) manufactured by Fuji Oil Co., Ltd.

[0054] The whipping time and overrun were evaluated. The evaluation methods for each were as follows. If both items were passed, the product was evaluated as passing overall.

[0055] ■How to evaluate whipping time 320 g of sugar was added to 4 kg of each plant-based foaming oil-in-water emulsion, and the mixture was whipped in a mixer ("NHP-20M," high-speed, manufactured by Kanto Mixing Machinery Co., Ltd.), and the time required to reach the optimum foaming state was measured. A product that took 10 minutes or less to reach the optimum foaming state was deemed to have good foaming properties and passed the test. The time required to reach the optimum foaming state refers to the time from the start of stirring to the time the optimum foaming state is reached when the emulsion of the present invention is stirred to foam, and the optimum foaming state refers to the state in which the emulsion has reached its maximum volume due to foaming.

[0056] ■ Method for evaluating overrun The overrun was calculated using the following formula under the optimum foaming condition at the time of evaluation of the whipping time. An overrun value of 85 or more was considered to be acceptable. [(Amount of foamable oil-in-water emulsion substance before foaming) - (Amount of foamable oil-in-water emulsion substance in maximum foaming state)] ÷ (Amount of foamable oil-in-water emulsion substance in maximum foaming state) × 100 [Unit: %]

[0057] [Table 2] TIFF2025151959000002.tif114169

[0058] In a plant-based foamable oil-in-water emulsion containing a stearic acid-containing oil and an oat-derived oil, good foaming properties were obtained even though the emulsifier content was 2% by mass or less (Examples 1 to 5). On the other hand, a plant-based foamable oil-in-water emulsion containing a stearic acid-containing oil but not an oat-derived oil could not be whipped, and the whipping time and overrun were not measurable (Comparative Example 2). Furthermore, in a plant-based foamable oil-in-water emulsion containing an oil other than a stearic acid-containing oil, the whipping time was within 10 minutes, but the overrun did not exceed 85°C (Comparative Example 3).

Claims

1. A plant-based foamable oil-in-water emulsion containing a plant protein material and having an emulsifier content of 2% by mass or less, A plant-based foamable oil-in-water emulsion comprising a stearic acid-containing fat containing 20% ​​by mass or more of stearic acid among its constituent fatty acids, and oat-derived oil.

2. 2. The plant-based foamable oil-in-water emulsion according to claim 1, wherein the total content of unsaturated fatty acids in the constituent fatty acids of the stearic acid-containing oil or fat is 25 to 75% by mass. The unsaturated fatty acids include oleic acid, linoleic acid, and linolenic acid.

3. 3. The plant-based foamable oil-in-water emulsion according to claim 1, wherein the ratio of linoleic acid to oleic acid (linoleic acid / oleic acid ratio) among the constituent fatty acids of the stearic acid-containing oil is 0.03 or more.

4. 3. The plant-based foamable oil-in-water emulsion according to claim 1, wherein the content of S2U triglycerides in the constituent triglycerides of the stearic acid-containing oil or fat is 5 to 88% by mass. S refers to saturated fatty acids with 16 to 22 carbon atoms, and U refers to unsaturated fatty acids with 18 carbon atoms, including oleic acid, linoleic acid, and linolenic acid. S2U is a triglyceride in which two S molecules and one U molecule are bonded.

5. 4. The plant-based foamable oil-in-water emulsion according to claim 3, wherein the content of S2U triglycerides in the constituent triglycerides of the stearic acid-containing oil or fat is 5 to 88% by mass. S refers to saturated fatty acids with 16 to 22 carbon atoms, and U refers to unsaturated fatty acids with 18 carbon atoms, including oleic acid, linoleic acid, and linolenic acid. S2U is a triglyceride in which two S molecules and one U molecule are bonded.

6. 3. The plant-based foaming oil-in-water emulsion according to claim 1, wherein the raw materials of the plant-based foaming oil-in-water emulsion do not contain any animal material.

7. 4. The plant-based foaming oil-in-water emulsion of claim 3, wherein the raw materials of the plant-based foaming oil-in-water emulsion do not contain any animal-derived material.

8. 5. The plant-based foaming oil-in-water emulsion of claim 4, wherein the raw materials of the plant-based foaming oil-in-water emulsion do not contain animal materials.

9. 6. The plant-based foaming oil-in-water emulsion of claim 5, wherein the raw materials of the plant-based foaming oil-in-water emulsion do not contain any animal-derived material.

10. A method for producing a plant-based foamable oil-in-water emulsion containing a plant protein material and having an emulsifier content of 2% by mass or less, comprising: A method for producing a plant-based foamable oil-in-water emulsion, the method comprising: containing a stearic acid-containing fat or oil containing 20% ​​by mass or more of stearic acid among constituent fatty acids; and containing oat-derived oil in the oil phase of the emulsion.

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