JP2981137B2 - Green tea beverage and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a green tea beverage and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, green tea beverages are usually prepared by adjusting the particle size and turbidity of a green tea extract obtained by a kneader method or the like in a solid-liquid separation process such as centrifugation or filtration, followed by preparation, filling and sterilization. Conduct manufacturing. At this time, when trying to produce a refreshingly flavored green tea beverage, the strength of solid-liquid separation can be increased and the turbidity can be reduced, while the flavor of green tea contains fine particles and has a rich and deep flavor When the green tea beverage is manufactured, the strength of solid-liquid separation can be reduced and the turbidity can be increased.

However, a conventional solid-liquid separator such as a centrifugal separator of a plate type cannot control the degree of removal of fine particles in a green tea beverage, that is, cannot control the turbidity. In addition, there is a problem that a large facility investment is required because the equipment improvement such as introduction of a microfiltration machine is required.

[0004] Japanese Patent Application Laid-Open No. 62-44136, Japanese Patent Application Laid-Open No. 03-108444, and Japanese Patent Application Laid-Open No. 04-31348 are examples of techniques relating to tea extract and production of green tea beverages. However, these prior arts do not disclose a method of performing solid-liquid separation of a green tea extract and then adding and adjusting green tea powder during preparation.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method for producing green tea and a product thereof, in which a conventional solid-liquid separator can be used in the process of producing green tea and the turbidity of the green tea can be freely adjusted. .

A first aspect of the present invention is that the minimum particle size capable of separating 100% of the fine particles generated during green tea extraction is 0.5 to 5 μm.
m, the green tea powder was added to the transparent green tea extract having a turbidity of less than 0.05 at OD ₇₂₀ , and the turbidity was reduced to O.
About green tea beverage which is characterized in that it has a D ₇₂₀ at 0.05 to 3.00.

[0007] The second aspect of the present invention is that the minimum particle size capable of separating 100% of the fine particles generated during the extraction of green tea is 0.5 to 5 µm.
The green tea extract is centrifuged under the conditions described in
And ₇₂₀ with less than 0.05 of the treatment liquid, then _{OD 720} the turbidity of green tea beverage obtained by adding green tea powder during compounding
And a method for producing a green tea beverage characterized by having a pH of 0.05 to 3.00.

[0008] As a method for removing fine particles from the green tea extract, a centrifuge is used. Centrifugation is used under the condition that the minimum particle size at which 100% separation is possible is 0.5 to 5 μm.

The green tea powder to be added at the time of preparation may be any green tea powder as long as it is finely pulverized. Green tea powder is preferred as a form having a uniform particle size and used. The particle size of the green tea powder may be arbitrarily adjusted by a separator, but a green tea powder having a particle size distribution of 0.1 to 150 μm is more effective.

[0010] When adding the green tea powder, it is advisable to mix it with other powdered ingredients before mixing, add a small amount of water to the mixture, add high-speed stirring and dispersion, and then pass through a strainer.

According to the production method of the present invention, the green tea beverage can be adjusted to an appropriate turbidity. Turbidity affects the texture of green tea. That is, if the turbidity is too large, roughness is increased and unpleasantness increases. On the other hand, if the turbidity is too small, the body feels too clear and the body feels less. Therefore, after centrifugation, when adding green tea powder, the texture is preferable and the turbidity that does not cause precipitation is examined. The OD ₇₂₀ value is 0.05 to 3.00, particularly 0.05
-1.5 was found to be preferable.

[0012]

The present invention will be described below with reference to examples.
The present invention is not limited by this.

Example 1 As shown in FIGS. 1 to 3, 30 liters of green tea liquid extracted by a kneader was roughly filtered through an 80 mesh screen to obtain a green tea extract, and then 100 centimeters were separated by a centrifugal separator.
Operating under the condition that the minimum particle size that can be separated by 2% is 2 μm,
A green tea extract from which fine particles were removed was obtained. On the other hand, green tea powder having a median diameter of 14 μm was premixed with sodium bicarbonate and sodium ascorbate (shown as AsANA in FIG. 1 and vitamin C Na in FIG. 2), and then premixed.
The mixture was added to 1 liter of water, stirred at high speed and dispersed, and then passed through a 200 mesh strainer to obtain a green tea powder dispersion. The green tea powder dispersion was mixed in the preparation tank with the green tea extract from which fine particles had been removed by the centrifugal separator to obtain a green tea beverage of the present invention. The resulting turbidity of green tea beverages, 0.07 at OD ₇₂₀
It was 5.

Example 2 30 liters of green tea liquid extracted by a kneader was roughly filtered through an 80-mesh screen to obtain a green tea extract, and the minimum particle size at which a 100% separation by a centrifugal separator was 2 μm. To obtain a green tea extract from which fine particles were removed. On the other hand, green tea powder having a median diameter of 49 μm is premixed with sodium hydrogen carbonate and sodium ascorbate,
After addition to 5 liters of water and high-speed stirring and dispersion, the mixture was passed through a 200 mesh strainer to obtain a green tea powder dispersion. The green tea powder dispersion was mixed in the preparation tank with the green tea extract from which fine particles had been removed by the centrifugal separator to obtain a green tea beverage of the present invention. The resulting turbidity of the green tea beverage, in OD ₇₂₀ 0.0
80.

[0015]

Industrial Applicability According to the present invention, a green tea beverage having a rich taste containing green tea fine particles moderately and having a deep taste can be obtained. Further, the green tea beverage of the present invention has a feature that it can be adjusted to an appropriate turbidity. Furthermore, compared to a turbidity adjustment method using microfiltration or the like, the management work is easy at a low cost for equipment.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing an outline of a method for producing a green tea beverage of an example of the present invention.

FIG. 2 is a flow sheet showing all process charts of an embodiment of the present invention.

FIG. 3 (a) is a graph showing the relationship between the particle size of a green tea extract and the corresponding particle amount. (B) is a graph showing the relationship between the particle size after centrifugation and after addition of green tea powder and the corresponding particle amount.

Claims (2)

(57) [Claims] 1. Fine particles produced by extracting green tea are
A green tea powder is added to a transparent green tea extract having a turbidity of less than 0.05 at OD ₇₂₀ by removing the 0% separable minimum particle size under 0.5 to 5 μm, and the turbidity is reduced to OD _720. With 0.
A green tea beverage, wherein the green tea beverage has a ratio of from 0.5 to 3.00. 2. The method according to claim 1, wherein the fine particles produced by the extraction of green tea are 100
The green tea extract is centrifuged under the condition that the minimum particle size that can be separated is 0.5 to 5 μm, and its turbidity is 0.05 at OD ₇₂₀ .
Less than the processing liquid and then the turbidity of green tea beverage obtained by adding green tea powder when formulated at _{OD 720} 0.05 to 3.
A method for producing a green tea beverage, wherein the method is set to 00.