Patent Application
20160353936
The present invention relates to a packaged wheat flour that can be used by being shaken out of a container.
Wheat flour is used not only as a material, for example, of breads, cakes, and noodles but also as a food coating for the purpose of, for example, absorbing water from the surface of a foodstuff to increase its cohesion with another foodstuff, reducing the stickiness of foodstuffs to prevent adhesion between the foodstuffs, or preventing loss of a savory taste (umami) or burning and sticking of a foodstuff during heating of the foodstuff.
Wheat flour is likely to scatter as dust, while their particles have a tendency to gather to lumps. Hence, in an attempt to attach wheat flour to the entire foodstuff evenly, a technique has conventionally been used in which a large amount of wheat flour is spread on a chopping board or the like and then the foodstuff is rolled on it to attach the wheat flour to the surface of the foodstuff. However, this technique requires an excess amount of wheat flour relative to the foodstuff and inevitably involves a problem of disposal of a large amount of wheat flour having failed to attach to the foodstuff, thus imposing cumbersome and wasteful procedures, particularly in households which use only a relatively small amount of foodstuffs. Additionally, the wheat flour having absorbed moisture from the foodstuff etc. in this technique may adhere to hands and thus make the hands so sticky that other procedures cannot be done.
Patent Literature 1 proposes wheat flour which is unlikely to scatter or form lumps of powder during a procedure, the wheat flour comprising 90% or more of particles having a particle diameter of 150 μm or less and 20 cumulative volume % or less of particles having a particle diameter of 20 μm or less. Patent Literature 2 proposes a granulated composition for batter which is granulated by spraying a liquid containing an emulsifier onto a powder composition containing cereal flour. However, these also require the above-described technique when applied to foodstuffs and are not solutions to the problems of disposal and adhesion to hands.
When conventional wheat flour is attempted to be shaken out of a shaker-type container onto a foodstuff, the wheat flour forms lumps and gets stuck in shaker holes, thus failing to come out of the container. Increasing the size of the shaker holes allows a large amount of wheat flour to come out at one time, thus causing the wheat flour to be excessively applied onto a foodstuff as well as making the wheat flour more likely to scatter around the surroundings. The present inventors have conducted a detailed study with the goal of providing wheat flour which can be shaken out of a shaker-type container onto a foodstuff in small amounts with little scattering or lumping.
As a result, the present inventors have found that when wheat flour having a predetermined particle size distribution is packed in a container having one or more shaker holes having a predetermined size, the wheat flour can be shaken out in small and constant amounts evenly over a certain extent of area with little scattering.
That is, the present invention provides a packaged wheat flour comprising wheat flour packed in a shaker-type container having one or more shaker holes having a maximum width of 2 to 20 mm, the wheat flour having a particle diameter at 10%, D10, of 18 μm or more and a particle diameter at 90%, D90, of 500 μm or less.
The present invention also provides a method of applying wheat flour, comprising shaking out wheat flour through shaker holes to apply the wheat flour to an object, wherein the wheat flour is packed in a shaker-type container having one or more shaker holes having a maximum width of 2 to 20 mm, and the wheat flour has a particle diameter at 10%, D10, of 18 μm or more and a particle diameter at 90%, D90, of 500 μm or less.
The present invention also provides a method of suppressing scattering and formation of lumps of wheat flour, comprising shaking out wheat flour through shaker holes to apply the wheat flour to an object, wherein the wheat flour is packed in a shaker-type container having one or more shaker holes having a maximum width of 2 to 20 mm, and the wheat flour has a particle diameter at 10%, D10, of 18 μm or more and a particle diameter at 90%, 590, of 500 μm or less.
The packaged wheat flour of the present invention can be sprinkled lightly and evenly onto the surface of an object such as a foodstuff, without touching the wheat flour with hands directly. Furthermore, the wheat flour does not scatter over a wide area to soil the hands or surroundings when sprinkled onto an object. The packaged wheat flour of the present invention is unlikely to get stuck in the shaker holes; thus, a certain amount of the wheat flour can be shaken out of the container by gentle operation without repeated or vigorous shaking of the container. With the packaged wheat flour of the present invention, cooking involving the use of wheat flour can be made simpler and more economical.
The packaged Wheat flour of the present invention is packed in a shaker-type container having one or more shaker holes having a predetermined size and is shaken out through the shaker holes of the container so as to apply the wheat flour to (e.g., sprinkled onto or dredged over) an object in small amounts. The term “shake” as defined in the present invention is not limited to an operation of giving a shake by directing an opening portion of the container downward, and also encompasses, for example, an operation of directing an opening portion of the container vertically downward, an operation of tilting the container, and an operation of giving a shake by inverting and inclining the container. Examples of the object to which the packaged wheat flour of the present invention is applied include, but are not limited to, foodstuffs and cooking utensils such as pans, baking sheets, chopping boards, and plates. The use of the packaged wheat flour of the present invention can avoid scattering or forming lumps of wheat flour when the wheat flour is applied to, particularly sprinkled onto or dredged over, an object in the manner as described above.
Preferably, the packaged wheat flour of the present invention can be used when wheat flour is applied as a cooking ingredient to a foodstuff or a cooking utensil. For example, the packaged wheat flour of the present invention can be used in cases when a small amount of wheat flour is attached to a foodstuff for flouring in making a sautéed food such as meuniere or as a coating ingredient of a deep-fried food such as karaage or fried food; when a small amount of wheat flour is attached to a cooking utensil for flouring in order to prevent adhesion of bakery dough or noodle dough; or when a small amount of wheat flour is added to a foodstuff for thickening food.
Wheat as a material of the wheat flour used in the packaged wheat flour of the present invention may be one belonging to any of strains such as hard wheat, soft wheat, medium-hard wheat, hexaploid wheat, and durum wheat, and may be of any variety belonging to any of those strains. The examples include, but are not limited to: hard wheat such as Canadian western red spring (CW), American dark northern spring (DNS), hard red winter (HRW), and Australian prime hard (PH); Japanese common wheat; medium-hard wheat such as Australian standard white (ASW); soft wheat such as American western white (WW); and durum wheat. Among the above wheats, any one variety or strain may be used alone or two or more different varieties or strains may be used in combination. The wheat flour used in the present invention may be wheat flour obtained by milling such wheat as mentioned above, and may be any one, or a mixture thereof, of hard wheat flour, semi-hard wheat flour, moderate wheat flour, soft wheat flour, and durum flour. Soft wheat flour is preferred.
The wheat flour used in the present invention may be granulated wheat flour. The granulated wheat flour may contain a powder material other than such wheat flour mentioned above, and examples of the powder material include: cereal flour other than wheat flour; starch; a saccharide; an excipient; and a dye powder. However, it is more preferable for the granulated wheat flour to have a lower content of the other powder material such that the granulated wheat flour can maintain the properties intrinsic to wheat flour and be easily used in the same applications as conventional wheat flour. Thus, the content of the other powder material in the granulated wheat flour (calculated as dry matter) is preferably less than 5 mass % of the total raw material flours including the wheat flour and the other powder material. More preferably, the granulated wheat flour contains no powder material other than the wheat flour. In other words, the content of the wheat flour in the granulated wheat flour (calculated as dry matter) is preferably more than 95 mass %, more preferably 100 mass %.
The granulated Wheat flour can be produced by adding water to a raw material flour containing wheat flour and granulating the raw material flour powder. It is preferable that the granulation be performed under a non-thermal condition. The non-thermal condition as defined herein refers to a temperature condition which keeps the degree of gelatinization of the raw material flour from increasing by 5% or more during the granulation process. Assuming, for example, that the raw material flour is wheat flour having a degree of gelatinization of 6% before granulation, the wheat flour granulated under the non-thermal condition has a degree of gelatinization of less than 11% after granulation. Such a non-thermal condition can be, for example, a condition in which external heating using a heating means is not performed or the time of heating is short during the granulation process so that the gelatinization of the raw material flour is hardly caused. Alternatively, for example, the non-thermal condition can be a condition in which external heating using heating means is not performed or the time of the heating is short during the granulation process and the heat internally generated during the granulation process is small so that the gelatinization of the raw material flour is hardly caused. As defined herein, the degree of gelatinization of the raw material flour is a value measured by β-amylase-pullulanase method which is a conventional method.
The method for preparing the granulated wheat flour used in the present invention is not particularly limited, and methods such as tumbling granulation, fluidized-bed granulation, and stirring granulation can be employed. Preferred is a method which can create the above non-thermal condition. Examples of the granulation process include, but are not limited to: a process in which granulation is accomplished by stirring raw material flour containing such wheat flour as described above using a vertical mixer while adding water gradually; and a process in which granulation is accomplished by stirring and transferring the raw material flour using a feeder-type horizontal mixer while adding water with a spray device or the like during the transfer so as to simultaneously perform mixing and transfer. In view of convenience, stirring granulation is preferred. Any of the granulation methods mentioned above can be carried out using a commercially-available granulator. The granulated wheat flour can be subjected to a particle-size regulation process or a drying process after granulation as necessary. These processes are also preferably performed under a condition which keeps the degree of gelatinization from increasing by 5% or more from that of the raw material flour.
The wheat flour used in the present invention may be non-granulated Wheat flour which is not subjected to granulation after milling, may be granulated wheat flour, or may be a mixture of them. Alternatively, classified flour obtained by subjecting the above wheat flour to classification may be used. The term “wheat flour” as used in the following description is intended to encompass both non-granulated wheat flour and granulated wheat flour, unless otherwise distinguished.
The wheat flour used in the packaged wheat flour of the present invention has a predetermined particle size distribution. To be specific, the particle diameter at 10% (D10) is 18 μm or more, preferably 25 μm or more, and the particle diameter at 90% (D90) is 500 μm or less, preferably 400 μm or less. For example, the wheat flour used in the packaged Wheat flour of the present invention can have D10 of 18 μm or more and 90% particle diameter D90 of 500 μm or less, have D10 of 18 μm or more and particle diameter at 90% D90 of 400 μm or less, or have D10 of 25 μm or more and D90 of 400 μm or less. When the wheat flour has D10 of less than 18 μm or D90 of more than 500 μm, dust-like behavior of fine particles or burst of large particles increases the scattering distance of the wheat flour, or the wheat flour forms lumps and becomes difficult to be shaken out of the container. For the wheat flour used in the packaged wheat flour of the present invention, it is more preferable that D90/D10 be 2 to 16, even more preferable that D90/D10 be 3 to 12. When D90/D10 is more than 16, the wheat flour forms lumps and becomes difficult to be shaken out of the container, or an excess amount of the wheat flour is shaken out, which leads to a large scattering distance or poor distribution uniformity. Incidentally, soft flour, which is typical wheat flour, has a particle size distribution such that D10 is about 10 to 15 μm and D90 is about 100 to 120 μm.
As defined herein, the particle diameter at 10% or D10 refers to a value calculated by laser diffraction-scattering method and corresponding to cumulative 10% of particles passing through sieves. Similarly, the particle diameter or D90 refers to a value calculated by laser diffraction-scattering method and corresponding to cumulative 90% of particles passing through sieves. D90/D10, as defined herein, is a ratio between D10 and D90 and is an index of the width of the particle size distribution.
An example of the method for adjusting the particle size distribution of wheat flour to the above range is a method in which wheat flour is classified and a portion of the wheat flour is selectively collected so that the collected wheat flour has a particle size distribution within the above predetermined range. Another example of the method for adjusting the particle size distribution of wheat flour is a method in which wheat flour is granulated so that the particle size distribution falls within the above predetermined range. Alternatively, the granulated wheat flour may be further classified to achieve the above predetermined particle size distribution to use. Additionally, wheat flours classified or granulated as above may be mixed together as appropriate, or they may further be mixed with typical wheat flour, to prepare wheat flour having the desired particle size distribution. However, in view of increasing the homogeneity of the wheat flour and improving its duality as a cooking ingredient or stability during the shaking-out operation, it is preferable to use the granulated wheat flour alone.
A preferred example of the wheat flour used in the present invention is granulated wheat flour prepared to have the above predetermined particle size distribution by subjecting 100 parts by mass of raw material flour containing 95 mass- or more of wheat flour to stirring granulation performed under the non-thermal condition described above while adding 25 to 40 parts by mass of water and by optionally further subjecting the granulated flour to particle-size regulation and drying.
Additionally, it is preferable for the wheat flour used in the present invention to have a mean particle diameter of 40 to 400 μm, more preferably 40 to 200 μm, in view of further reducing scattering of the wheat flour shaken out of the container. The mean particle diameter of the wheat flour as defined herein is a mean volume diameter (MV) based on particle diameters calculated by laser diffraction-scattering method.
The wheat flour used in the present invention may, depending on its intended use, be mixed with another powder material and thus provided in the form of a wheat flour composition. Examples of the other powder material include: typical wheat flour such as hard wheat flour, semi-hard wheat flour, moderate wheat flour, soft wheat flour, and durum flour; cereal flour other than wheat flour such as rye flour, rice flour, corn flour, barley flour, and bean flour; starch such as tapioca starch, potato starch, corn starch, waxy corn starch, and wheat starch; processed starch such as pregelatinized, etherified, esterified, acetylated, and cross-linked products of the above starch; a saccharide; egg powder; egg white powder; a thickener; fat and oil; an emulsifier; an excipient; a fluidizer; a seasoning; a spice; activated gluten; and an enzyme additive. The amount of the wheat flour with the predetermined particle size distribution used in the wheat flour composition according to the present invention differs depending on factors such as the intended use and production cost of the wheat flour composition, but is preferably 40 mass % or more, more preferably 50 mass % or more, even more preferably 60 masse- or more. It is preferable that the particle size distribution of the wheat flour composition be within the above predetermined range.
According to the present invention, the wheat flour or the wheat flour composition is provided in the form of being packed in a shaker-type container having one or more shaker holes. The shaker-type container may be a container having a size and shape which allow it to be held with one hand for the operation of shaking out the wheat flour packed therein. For example, a container having a size and shape like those of cruets for seasonings and spices is preferred. To be more specific, the shaker-type container is preferably a self-supporting container in the shape of a cylindrical column, an elliptical column, or a prismatic column with a diameter or a length of one side of the base of about 20 to 100 mm and a height of about 80 to 200 mm and having a size which allows about 50 to 300 g of the wheat flour to be packed. The material of the container is not particularly limited as long as the material allows preservation of the Wheat flour and does not deform during the shaking-out operation. Examples of the material include plastics, metals, and paper.
The shape of the one or more shaker holes of the shaker-type container is not particularly limited, and examples thereof include circles, triangles, rectangles, and other polygons. The size of each of the one or more shaker holes is such that its maximum width is preferably 2 to 20 mm, more preferably 3 to 12 mm, even more preferably 4 to 8 mm. The number of the shaker holes is preferably 2 to 9, more preferably 4 to 7. When the size of the shaker holes is too small or when the number of the holes is small, the shaken-out amount is likely to be too small or the holes are likely to be clogged with the wheat flour. On the other hand, when the size of the shaker holes is too large or when the number of the holes is large, a large amount of the wheat flour is shaken out of the container in one shaking-out operation, and thus the wheat flour is excessively sprinkled onto an object or unnecessarily consumed, leading to reduced economic efficiency, in addition to which the wheat flour is likely to scatter and soil the surroundings. The shaker-type container used in the present invention preferably has 2 to 9 shaker holes in the shape of a circle with a diameter of 2 to 20 mm, more preferably has 4 to 7 shaker holes in the shape of a circle with a diameter of 3 to 12 mm, even more preferably has 4 to 7 shaker holes in the shape of a circle with a diameter of 4 to 8 mm. Alternatively, the shaker-type container used in the present invention preferably has 2 to 9 shaker holes approximately in the shape of a rectangle or another polygon with a diagonal length of 2 to 20 mm, more preferably has 4 to 7 shaker holes approximately in the shape of a rectangle or another polygon with a diagonal length of 3 to 12 mm, even more preferably has 4 to 7 shaker holes approximately in the shape of a rectangle or another polygon with a diagonal length of 4 to 8 mm.
The shaker-type container may further include a spooning opening in addition to the one or more shaker holes. The spooning opening can be used as an opening through which the wheat flour is taken out of the container with a measuring spoon, a tea spoon, or the like or through Which a relatively large amount of the wheat flour is shaken out of the container. In the shaker-type container, the spooning opening is preferably located at a distance from the one or more shaker holes. For example, the shaker holes may be arranged at one end of the top face of the shaker-type container while the spooning opening may be provided at a point 90 to 180° away from the shaker holes in the top face.
The one or more shaker holes and the spooning opening of the shaker-type container are preferably covered with a lid. The type of the lid is not particularly limited. A lid easily openable/closable with one hand, such as a sliding lid or flap lid, is preferred. The lid for the shaker holes is preferably a single lid capable of opening/closing a plurality of shaker holes together. The lid for the one or more shaker holes and the lid for the spooning opening may be one shared lid or may be separate, distinct lids. In either case, it is preferable for the lid(s) to be configured to avoid simultaneous opening of the one or more shaker holes and the spooning opening. For example, the lid for the one or more shaker holes and the lid for the spooning opening are two flap lids openable/closable independently of each other. Alternatively, the lid for the one or more shaker holes and the lid for the spooning opening are one shared sliding lid that moves to close at least either the shaker holes or the spooning opening.
It is preferable that, when the packaged wheat flour of the present invention is shaken out of the container by performing once the shaking-out operation of directing the opening portion of the container vertically downward, the wheat flour can be shaken out in an amount suitable for flouring an ingredient such as meat or fish. The suitable amount is, for example, about 0.5 g to 2 g, more preferably about 0.8 to 1.4 g. It is also preferable that, when the packaged wheat flour of the present invention is shaken out of the container toward a target point on a plane located 10 cm downward by performing the above shaking-out operation once, the wheat flour can be distributed over a suitable extent of area for flouring an ingredient such as meat or fish. The area is, for example, a limited area extending to a maximum width of about 8 to 25 cm, preferably to a maximum width of about 10 cm to 20 cm, with the target point defined as the center of the area. If it is desired to shake a larger amount of the wheat flour out of the container or distribute the wheat flour over a broader area, the above shaking-out operation may be repeated or may be performed more vigorously.
Next, examples will be given to describe the present invention in more detail. It should be noted that the present invention is not limited only to the examples given below.
1 kg of commercially-available wheat flour (soft flour, “Flour”, manufactured by Nisshin Flour Milling Inc. and having D10 of 11 μm and D90 of 112 μm) was put in a container and stirred with a hand mixer while adding water from a spray, which was followed by drying in a thermostatic chamber. This granulation was performed with variation of the conditions such as the amount of added water, the temperature during stirring, and the drying time and, further, the obtained granulated wheat flour was classified using sieves, as required. In this way, wheat flours having particle size distributions shown in Table 1 were produced. The particle size distributions and the mean particle diameters (mean volume diameter of particle diameters: MV) of the wheat flours thus produced were measured by laser diffraction-scattering method using Microtrac MT3000II (NIKKISO CO., LTD.). A cylindrical container with a diameter of 50 mm and a height of 120 mm was packed with 100 g of each wheat flour, and then a circular plastic plate having a diameter of 50 mm and a thickness of 0.2 mm and having five shaker holes of 5 mm diameter was fitted to the top of the container. In this way, shaker-packaged wheat flours were produced.
Each of the packaged wheat flours of Production Examples 1 to 11 was shaken out onto a smooth, flat surface placed horizontally. The shaking-out was done at a height of 10 cm directly above a mark provided at the center of the flat surface by performing once the operation of directing the opening portion of the container vertically downward toward the mark. The amount of the wheat flour shaken out was measured as the shaken-out amount. The area over which the shaken-out wheat flour was distributed was defined, the lengths of straight lines each extending from a point on one outer edge of the area to another edge through the mark were measured, and the maximum of the lengths was employed as the scattering distance. The measurement was conducted 10 times for each wheat flour, and the average values of the shaken-out amount and scattering distance were determined and evaluated by three ratings, A, B, and C according to the criteria listed below. In addition, the uniformity of distribution of the shaken-out wheat flour was evaluated. For the distribution uniformity, the wheat flour shaken out of the container by the same operation as above was visually observed, and the distribution of the shaken-out wheat flour was evaluated by four ratings, A, B, C, and according to the criteria listed below. The evaluation was performed three times. When the same score was obtained twice or more, the score was adopted as an evaluation result for the distribution uniformity. When all the three times of evaluation yielded different scores, the distribution uniformity was determined to be unevaluable.
A 0.8 to 1.4 g
B 0.5 or more and less than 0.8 or more than 1.4 g and 2 g or less
C less than 0.5 g or more than 2 g
A 10 to 20 cm
B 8 cm or more and less than 10 cm or more than 20 cm and 25 cm or less
C less than 8 cm and more than 25 cm
A Substantially uniform and almost no unevenness.
B Slightly uneven.
C Significantly uneven.
D Significantly uneven, and there are some portions where the wheat flour is not at all distributed or distributed in lumps.
The results are shown in Table 1. A result obtained for commercially-available wheat flour (“Flour” manufactured by Nisshin Flour Milling Inc.) is shown as a reference example.
As shown in Table 1, when the commercially-available wheat flour containing a large amount of small-diameter component was attempted to be used by shaking it out of the container, the holes were clogged at the first shaking-out operation, and any fraction of the wheat flour was not shaken out of the container. The result of this test revealed that the particle size distribution of wheat flour preferably satisfies both D10≧18 μm and D90≦500 μm in order that the wheat flour may, without clogging shaker holes, be shaken out of a container in a suitable amount over a suitable extent of area to flour a typical foodstuff. For the packaged wheat flouts having such a particle size distribution (Production Examples 1 to 8), the shaken-out amount and the scattering distance fell within the suitable range, the distribution uniformity was high and, in addition, the shaken-out amount and the scattering distance did not vary much between shaking-out operations. Furthermore, even repeated shaking-out operations did not cause the holes to be clogged, which means that high ease of handling was achieved. In particular, for the packaged wheat flours satisfying both D10≧25 μm and D90≦400 μm (Production Examples 3, 6, and 7), the variation between shaking-out operations was small, and the wheat flour could be spanked out almost evenly.
Shaker-packaged wheat flours were produced (Production Examples 12 to 24) in the same manner as in Production Example 3, except for varying the size of the shaker holes of the shaker-type container as shown in Table 2. The packaged wheat flours were evaluated for the shaken-out amount, scattering distance, and distribution uniformity in the same manner as in Test Example 1. The result for Production Example 3 is also shown again in Table 2.
As shown in Table 2, the shaken-out amount and scattering distance of the wheat flours were successfully adjusted to the suitable ranges by appropriately setting the size and number of the shaker holes.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2014-023463 | Feb 2014 | JP | national |
| PCT/JP2014/059085 | Mar 2014 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2015/053691 | 2/10/2015 | WO | 00 |
