JP6343314B2 - Shochu storage container - Google Patents

Description

The present invention relates to a shochu container.

  Conventionally, as a container for storing alcoholic beverages, for example, a tank for alcoholic beverages (hereinafter referred to as a conventional example) as disclosed in JP-A-9-58787 has been proposed.

  In this conventional example, titanium is lined on the inner surface of a tank body for storage. For example, in the case of a metal container, when liquor is stored, iron ions are eluted, causing discoloration of liquor and change in taste. When the titanium is lined as described above, the alteration is prevented as much as possible, and the liquor can be satisfactorily stored.

JP-A-9-58787

As a result of further research and development on the aforementioned titanium container for storing sake, the present inventors have developed a shochu storage container that exhibits an unprecedented effect.

  The gist of the present invention will be described with reference to the accompanying drawings.

A shochu container for reducing the astringent taste of shochu, wherein the inner surface 1 ' of the container body 1 is made of titanium having a large number of crystal grains 10 , and 80% or more of the crystal grains 10 are 20 μm or more. The crystal grains 10 having a size and seven or more corners, and the crystal grains 10 having a size of 20 μm or more and having seven or more corners have a Bragg angle of 34 to 41 degrees in X-ray analysis. those according to shochu container, wherein the bottom surface and the top surface of the hexagonal close-packed structure in the range of a texture to be parallel to the plate surface of the inner surface 1 '.

Further, in shochu container of claim 1 Symbol placement, the inner surface 1 of the container body 1 'is one of the shochu container which is characterized in that which has been heat treated in a vacuum atmosphere.

Further, in the shochu storage container according to any one of claims 1 and 2 , the container main body 1 includes a titanium inner cylinder 3 disposed in an outer cylinder 2 through a space S, and the outer body 2 is disposed outside. The present invention relates to a shochu storage container having a vacuum container structure in which a space S between the cylinder 2 and the inner cylinder 3 is a vacuum heat insulating space.

The invention because I as described above, such as it is possible to improve the taste of shochu, a breakthrough shochu container to exert effects unprecedented.

It is explanatory sectional drawing of a present Example. 3 is an explanatory diagram showing the evaluation of the grain size of crystal grains 10. FIG. It is explanatory drawing which shows the number of strokes of a crystal grain. It is a table | surface which shows subject AD used by the taste test which shows the effectiveness of a present Example. 2 is an enlarged explanatory view showing crystal grains 10 provided on the surface of a subject B. FIG. 2 is an enlarged explanatory view showing crystal grains 10 provided on the surface of a subject C. FIG. 2 is an enlarged photograph showing a crystal grain 10 provided on the surface of a subject D. FIG. It is a graph which shows the X-ray-analysis result in material, subject B, and subject D. It is a graph which shows the taste test result (shochu) which shows the effectiveness of a present Example. It is a graph which shows the taste test result (shochu) which shows the effectiveness of a present Example. It is a graph which shows the taste test result (whiskey) which shows the effectiveness of a present Example. It is a graph which shows the taste test result (whiskey) which shows the effectiveness of a present Example. It is a table | surface which shows the taste test result which shows the effectiveness of a present Example. It is a table | surface which shows the taste test result which shows the effectiveness of a present Example.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  The present inventor conducted a test focusing on the fact that the crystal grains generated on the surface when titanium was heated exerted a predetermined action on the liquid (sake), and completed the present invention based on this result. .

That is, when preparing a plurality of containers made of titanium having different manufacturing processes, and storing the shochu in these containers and conducting a taste test of the shochu (test using a taste recognition device), the size and state (shape) of the crystal grains astringency of shochu has confirmed the fact that the reduced accordingly). This is to consistent with the idea that specific adsorption to adsorb tannins as a source of astringency contained in shochu according to the size of the crystal grains.

Based on this result, the present invention is to obtain a container for reducing the astringency of shochu, the inner surface 1 of the container body 1 'was composed of titanium, the inner surface 1' or more size 20μm and In addition, a large number of crystal grains 10 having seven or more corners were provided. The crystal grains 10 having a size of 20 μm or more and having seven or more corners were obtained by heat treatment at a temperature higher than the temperature at which the α phase was transformed into the β phase.

In fact, and to accommodate the shochu to drink container according to the present invention, astringency becomes mellow decreased, the taste will be good.

  Specific embodiments of the present invention will be described with reference to the drawings.

  This embodiment is a container for reducing the astringent taste of shochu or whiskey, and the inner surface 1 ′ of the container body 1 is made of titanium, and this inner surface 1 ′ has a phase from α phase to β phase. By being heat-treated above the transformation temperature, a large number of crystal grains 10 having a size of 20 μm or more and having seven or more corners are provided.

  In this embodiment, the container body 1 is configured as a beverage container used when drinking alcohol. However, the container body 1 may be a storage container (server) for storing alcohol while aging, for example. It is not a thing.

  The container body 1 has a vacuum container structure in which an inner cylinder 3 is disposed in an outer cylinder 2 via a space S, and the space S between the outer cylinder 2 and the inner cylinder 3 is a vacuum heat insulating space. is there. The container body 1 may have a hollow double structure in which the space portion S is not evacuated, or may have a single structure instead of a hollow double structure. In any case, the inner surface 1 ′ of the container body 1 is in a vacuum atmosphere. It is desirable that the heat treatment be performed at a temperature higher than the temperature at which the α phase is transformed into the β phase (882 ° C.).

  Specifically, the outer cylinder 2 and the inner cylinder 3 constituting the container body 1 are bottomed cylindrical bodies made of titanium as illustrated in FIG. 1, and the inner cylinder 3 is compared with the outer cylinder 2. The diameter is small and the height is set low, and the open end portions 2a and 3a are set to have substantially the same diameter.

  Therefore, when the inner cylinder 3 is arranged in the outer cylinder 2 and the opening end portions 2 a and 3 a are joined together, a space S is formed between the outer cylinder 2 and the inner cylinder 3.

  Titanium in this specification indicates pure titanium, and only the inner cylinder 3 is made of titanium, and the outer cylinder 2 is not limited to titanium but may be other metals or synthetic resins.

  A recess 2b is provided at the center of the bottom of the outer cylinder 2, and a deaeration hole 2b 'for vacuum sealing is provided at the center of the recess 2b.

  Further, as shown in FIG. 1, the container body 1 is provided with a large number of crystal grains 10 having a size of 20 μm or more on the inner surface 1 ′ and the outer surface 1 ″ in the manufacturing process described later. From the test results described later, the size of 10 seems to have a better effect on shochu or whiskey, but the lower limit is set to 20 μm considering the effect on taste, and the upper limit is considered when productivity is considered. Is set to 11 mm.

In this embodiment, so that by Riyui Akiratsubu 10 in the following method for producing the crystal grains 10 and having a seven or more corners in the above size 20 [mu] m.

  That is, first, the inner cylinder 3 is arranged in the outer cylinder 2, and the opening end portions 2 a and 3 a are joined to each other by welding (argon welding) to provide the container body 1. A space S is formed between the inner surface of the outer cylinder 2 constituting the container body 1 and the outer surface of the inner cylinder 3. This space part S becomes a vacuum heat insulation space part by vacuum processing later.

  Subsequently, a heating / cooling process (normal pressure process) for cooling the container body 1 after heating is performed a plurality of times (twice).

  Specifically, the container body 1 is placed in a vacuum superheated furnace. At this time, a brazing material 4 (titanium brazing) is disposed around a deaeration hole 2 b ′ provided at the bottom of the outer cylinder 2, and a sealing plate 5 is placed on the brazing material 4.

In this state, the temperature in the vacuum heating furnace is about 800 ° C. or more (above the recrystallization temperature of titanium, and the temperature at which the transformation point of titanium is 882 ° C. (change from α structure (close-packed six-method structure) to β structure (body-centered cubic structure)). ) Exceeding about 1,050 ° C.) and gradually degassing to a vacuum state (10 ⁻³ to 10 ⁻⁵ Torr), and further raising the temperature to about 1050 ° C. This state is maintained for 15 to 20 minutes. At this time, the outer cylinder 2 and the inner cylinder 3 of the container body 1 are recrystallized (having an α structure), and the ductility is increased (the crystal grains are coarsened in the portion not recrystallized).

  At this time, the brazing material 4 is melted, the outer cylinder 2 and the sealing plate 5 are integrated, the deaeration hole 2b ′ is closed, and the space S between the outer cylinder 2 and the inner cylinder 3 is sealed in a vacuum state. It is stopped and a vacuum heat insulation space part is formed.

  When the heating is stopped and the temperature in the vacuum heating furnace is lowered to a temperature lower than 700 ° C. (about 630 ° C. to 670 ° C.) by natural cooling, nitrogen gas is introduced into the vacuum heating furnace to return to normal pressure, The temperature of the container body 1 is cooled down to room temperature at once, and the vacuum sealing operation is completed.

  The reason for returning to the atmospheric pressure state (introducing nitrogen gas) at a temperature lower than 700 ° C. is that the material is too soft at a high temperature of about 700 ° C. or higher. When the pressure is returned to normal pressure), the outer cylinder 2 and the inner cylinder 3 are largely recessed to form a portion where the outer cylinder 2 and the inner cylinder 3 come into contact with each other, and this is prevented.

  In addition, nitrogen gas is introduced and rapidly cooled, as will be described later, by heating to a temperature higher than the recrystallization temperature of titanium, the crystal grains 10 facing in the same direction are rapidly cooled to rapidly cool the crystal grains 10. This is to fix the orientation of.

  The reason why the heating and cooling treatment described above is performed in a vacuum heating furnace (in a vacuum atmosphere) is to prevent oxidation and nitridation (blackening that significantly reduces the commercial value) that can occur when processing in an oxygen atmosphere. In addition, when the temperature in the vacuum heating furnace becomes lower than 700 ° C., nitrogen gas is introduced into the vacuum heating furnace in order to shorten the working time, and nitrogen is about 800 ° C. or more. This is because nitriding is easy in the temperature range.

  In the heating / cooling process in the present embodiment, the container body 1 is processed with the cover body proposed by the present applicant in Patent No. 3581639 covered, and also in this respect, contact with oxygen or nitrogen is performed. By limiting, it is possible to reliably prevent the container body 1 from being darkened due to oxidation or nitridation.

  Subsequently, in the same manner as described above, the container body 1 that has been subjected to the first heating and cooling process is again subjected to the heating and cooling process. As a result of the grain size evaluation (crossing method) of the crystal grain 10 shown in FIG. 2, the crystal grain 10 (grain diameter) provided on the outer surface 1 ″ and the inner / outer surface 1 ′ of the container body 1 by this second heating / cooling process. Is a size of 20 μm or more.

  Note that the size of the crystal grains 10 increases as the number of heating and cooling processes and the time are increased. However, considering productivity (cost efficiency), two times (about 15 to 20 minutes each time) are considered appropriate.

  Next, the test which shows the effectiveness of the liquor storage container which concerns on the present Example manufactured as mentioned above is demonstrated.

  That is, subject A, subject B, subject C and subject D shown in FIG. 4 and shochu as sample liquid are prepared, and a taste recognition device (TS-5000Z manufactured by Intelligent Sensor Technology Co., Ltd.) is used. Taste test was conducted in each. In addition, this taste recognition device has a lasting taste that lasts after swallowing the food due to the difference in potential when the taste sensor is immersed in the reference solution and the sample solution. Taste is evaluated with two types of taste (aftertaste).

  Subject A is a glass container.

  The subject B is a titanium container in which a titanium inner cylinder 3 is disposed in a titanium outer cylinder 2 via a space S, and the space between the outer cylinder 2 and the inner cylinder 3 is provided. S has a hollow double structure that is not vacuum (equivalent to the state before the first heating and cooling treatment). The subject 2 is heated during the spinning process into the container shape, and as a result of the particle size evaluation (crossing method) of the crystal grains 10 shown in FIG. 2, the outer surface 1 ″ of the container body 1 and the sample liquid are touched. The inner surface 1 ′ was provided with crystal grains 10 having a size of 11 μm or less, and the crystal grains 10 having seven or more corners accounted for 59.4% of the surface area (total area observed with an electron microscope). The surface of the material (as-rolled material) before forming the outer cylinder 2 and the inner cylinder 3 constituting the present embodiment has crystal grains 10 having a size of 16 μm or less.

  Subject C is a titanium container, which was obtained by the manufacturing method according to this example described above except that the heating temperature condition was suppressed to 530 ° C. (Those subjected to two heating / cooling treatments) 2) As a result of the grain size evaluation (crossing method) of the crystal grain 10 shown in FIG. 2, the outer surface 1 ″ of the container body 1 and the inner surface 1 ′ in contact with the sample liquid have a crystal grain size smaller than 20 μm. 10 and the crystal grains 10 having seven or more corners provided on the surface area accounted for 54.0% of (the total area observed with an electron microscope).

  Subject D is a titanium container, which is obtained by the manufacturing method according to the above-described embodiment (two heat-cooling treatments are performed), and the grain size of the crystal grain 10 illustrated in FIG. As a result of the evaluation (crossing method), crystal grains 10 having a size of 20 μm or more are provided on the outer surface 1 ″ of the container main body 1 and the inner surface 1 ′ in contact with the sample liquid, and the crystal grains having seven or more corners are provided. 10 was 100% of the surface area (total area observed with an electron microscope).

  The crystal grains 10 are more stable in terms of energy as they are circular. In this regard, since the crystal grains 10 are closer to a circle by having seven or more corners, the seven crystal grains 10 that exhibit the effects of the present embodiment are seven. Those having the above corners are considered optimal.

  In addition, as shown in FIG. 8, the subject D is clearly different from the material (as-rolled material) and the subject B in the orientation of the crystal grains 10, and the subject D has a size of 20 μm or more and seven The large number of crystal grains 10 having the above-mentioned angles are such that the bottom surface and the top surface of the hexagonal close-packed structure of titanium are parallel to the plate surface of the inner surface 1 'in a Bragg angle range of 34 to 41 degrees in the X-ray analysis. It is formed in the texture.

  The results of a taste test using the taste recognition device for the sample liquids (shochu) placed in these subjects A to D are as shown in FIGS. In addition, the case where the sample liquid is put and left for 30 minutes (FIG. 9) and the case where it is left for 3 hours (FIG. 10) are tried.

  As shown in FIGS. 9 and 10, subject A did not have a significant change in taste, but titanium subjects B, C, and D showed a change in taste. The saltiness decreased, and the saltiness decreased as time passed. This shows that it is suitable as a beverage container used when drinking shochu, and can also be applied to a storage container that contains shochu and aged for a predetermined period.

  When actually tasting, it was confirmed that the subject D was clearly mellow.

  Moreover, the result of having performed whiskey as a sample liquid, having put this whiskey in the test subject A and D, and having performed the taste test twice using the taste recognition apparatus is as FIG.

  As shown in FIGS. 11 and 12, subject A did not have a significant change in taste, but subject D showed a change in taste, and subject D in particular showed a decrease in astringency. This shows that it is also effective for whiskey.

  As described above, in this embodiment, when shochu or whiskey is stored, the astringency is reduced and the taste becomes mellow, and the taste is improved.

  This is because the ethanol concentration is what determines the taste of shochu and whiskey, and the ethanol aqueous solution in which ethanol and water are mixed forms a cluster structure. Since ethanol is adsorbed on the wall when placed in a container having crystal grains 10 such as this, the taste of shochu and whiskey seems to be mild.

  Furthermore, it is thought that the specific adsorption which adsorb | sucks the tannin which becomes the origin of the astringency contained in liquor is also influenced.

  Further, in this embodiment, the container body 1 has a vacuum double structure, and if it is further closed with a lid, it is difficult to be affected by the outside air temperature. It will be suitable for

  Next, sensory evaluation showing the effectiveness of the sake container according to the present embodiment will be described.

  The test subject A, test subject B, and test subject D were poured into shochu (sake shochu), covered and left for 1 minute or 30 minutes, and then a taste sensory test was performed.

  The test method is as follows.

  (1) Performed by 5 evaluators.

(2) Evaluate odor, umami, and generality. The scoring criteria are 1 point (very bad), 2 points (slightly bad), 3 points (normal), 4 points (slightly good), and 5 points (very good). 1).

(3) Evaluate astringency, bitterness, and sourness. As an evaluation point, 5 points (substantially reduced),
4 points (slightly reduced), 3 points (ordinary), 2 points (slightly remaining), and 1 point (slightly remaining) are used as scoring standards (hereinafter referred to as sensory evaluation 2).

(4) The average value of the scoring results of the five subjects is calculated, and subject A as a reference product is set to 3 points (normal) as a reference, and subject A, subject B, and subject D are subjected to relative evaluation.

  The result of sensory evaluation 1 is as shown in FIG. 13, and subject D obtained a higher score than subject A and subject B.

  From this result, it can be seen that the subject D can improve the taste of shochu and can be applied as a beverage container poured with shochu.

  The result of sensory evaluation 2 is as shown in FIG. 14, and subject D obtained a higher score than subject A and subject B.

  From this result, it can be seen that the subject D can be applied as a beverage container poured with shochu like the result of sensory evaluation 1 with mild taste of sake. The result of this sensory evaluation 2 was almost the same as the result of the taste test described above, and it was confirmed that it was effective as a sake container.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

S space part 1 container main body 1 'inner surface 2 outer cylinder 3 inner cylinder
10 grains

Claims (3)

A shochu storage container for reducing the astringent taste of shochu , wherein the inner surface of the container body is made of titanium having a large number of crystal grains, and the crystal grains are 80% or more in size of 20 μm or more and 7 Further, the crystal grains having a size of 20 μm or more and 7 or more angles are hexagonal close-packed in a Bragg angle range of 34 ° to 41 ° in X-ray analysis. A shochu storage container , characterized in that the bottom and top surfaces of the structure are textures parallel to the plate surface of the inner surface . In shochu container of claim 1 Symbol placement, shochu container, wherein the inner surface of the container body is one that has been heat treated in a vacuum atmosphere. 3. The shochu storage container according to claim 1 , wherein the container main body includes a titanium inner cylinder disposed in an outer cylinder through a space portion, and the outer cylinder and the inner cylinder. A shochu storage container characterized by having a vacuum container structure in which the space portion is a vacuum heat insulating space portion.