JP2014217392A - Processed tea product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processed tea product capable of providing good organoleptic evaluation about appearance such as water color, cloudiness, precipitation condition of particles, taste (drinking feeling), concentration feeling, or the like without generating tea leaves as a waste during drinking, being environmentally friendly, and capable of providing efficient intake of active ingredients such as catechin contained in the tea leaves which usually is wasted as tea leaves, and to provide a manufacturing method therefor.SOLUTION: There is provided a processed tea product obtained by drying a tea extract, and a content ratio [A]/[B] of a water soluble solid part [A] to a water insoluble solid part [B] is 0.5 to 40.0.

Description

  The present invention relates to a processed tea product obtained by drying a tea extract extracted from chopped tea leaves, and a method for producing the same.

Tea is a beverage that has been popular all over the world since ancient times, and it is represented by green tea, mainly non-fermented tea that is widely consumed in Japan, semi-fermented tea represented by oolong tea, and fermentation represented by black tea. It has a wide variety of forms such as tea, and its drinking methods are diverse.
For example, in the case of green tea, it was a common form to drink warm tea that was drunk in the old teapot, but in recent years, green tea beverages in plastic bottles, water, or hot water to drink in the cold state Granules or powdered so-called dry instant green teas that are directly dissolved in water are also widely distributed.

  As mentioned above, the green tea drinking population has increased significantly in recent years as the number of drinking forms has increased, but on the other hand, there has been little change in the number of tea drinkers that can be drunk with teapots as in the past. However, it is necessary to throw away teapots and teacups in teapots, and when extracting with cold water for cold drinking, it tends to be rather avoided in recent years due to the long extraction time. is there.

The tea bag product and the dried instant green tea are effective dsdsv as a means of drinking tea easily, but in the case of the tea bag, it is necessary to discard the used tea bag and discard the tea shells. In terms of the point, compared with the case of drowning in a teapot, there was a problem that the amount of waste tends to increase rather than a significant reduction in labor.
On the other hand, the dried instant green tea has advantages such as the fact that it does not generate a tea shell itself and is easily dissolved in water, greatly reduces the labor of the drinker, and is environmentally friendly in that it is difficult to produce waste. However, when compared to sencha that has been brewed in a teapot, it is inferior in light blue and flavor, and generally, since water-insoluble solids are removed during production, there is no turbidity peculiar to green tea, and at the time of drinking It lacked the sense of concentration, and when dissolved in cold water, there was a problem that the fragrance did not stand and the balance was poor.

The above-mentioned problem of conventional dry instant green tea is one of the factors due to its general manufacturing method.
Since the dried instant green tea is obtained by subjecting a tea extract that can be drunk as it is to a plurality of processing steps such as filtration, concentration, sterilization, and drying, repeated in the course of the processing step. Heating causes deterioration of taste components and color components.
As a result, it is inferior in terms of taste such as light blue, cloudy appearance, flavor, depth of taste, etc. compared to sencha brewed in a teapot, and also in terms of texture and concentration, sencha brewed in a teapot It did not reach.

In addition, since active ingredients such as catechin and fat-soluble vitamins contained in tea leaves remain in the tea shells after extraction, it is more efficient if the tea leaves can be ingested as they are without being discarded as tea shells.
However, in the case of sencha that is brewed in a teapot or in a tea bag, it is difficult to actively ingest the tea leaves themselves, and instant green tea produced from a tea extract that can be drunk as it is, unless it is consciously concentrated. Had similar challenges.

As a technology related to instant green tea, “a tea-making method in which liquid contents are separated from steamed tea leaves by mechanical dehydration means, and the liquid contents are evaporated by drying means to form powder” (Patent Document 1) Is disclosed.
In the invention according to Patent Document 1, in order to squeeze the liquid content from tea leaves by mechanical dehydration means such as a press dehydrator, screw press machine, press press machine, etc. It has the advantage that powdered tea containing a large amount of active ingredients such as catechins contained in can be obtained.
However, compared to ordinary sencha, miscellaneous components and the like are extracted in the process of tea leaf compression, so that it is inferior in flavor, and the liquid content has less water-insoluble solid content. Therefore, when the powdered tea according to the present invention is dissolved, it is possible to solve the problems of conventional instant green tea that the turbidity is weak and the texture and concentration feeling when drinking are inferior compared to sencha It wasn't.

In addition, “a method for producing a powdered tea obtained by wet-pulverizing fresh leaves after steaming, separating the leaves and stems with a strainer or centrifugal sieve, and then further roasting them” Is disclosed (Patent Document 2).
However, in the invention according to Patent Document 2, the purpose is to remove the blue smell and bad taste caused by stems and veins contained in tea leaves, and after drying pasty tea which is an intermediate product In addition, since it is heated and roasted into powder, the taste component and color component are deteriorated by the heating, and it has a problem that the light blue color and flavor when dissolved are inferior to ordinary sencha, After all, the problems of conventional instant green tea could not be solved.

Japanese Patent Laid-Open No. 11-346654 Japanese Patent Laid-Open No. 9-163930

The inventors of the present application improve the appearance of a light-colored tea, etc. in the drinking state, the taste such as flavor, turbidity, texture, concentration, etc. of the dried tea processed product that can be dissolved in water or hot water At the same time, we conducted intensive research on the necessary elements to develop products that can efficiently ingest the active ingredients of tea leaves without generating tea leaves.
As a result, the ratio of the content of “water-soluble solids” and “water-insoluble solids” contained in the processed tea product is an important factor for satisfying the above-mentioned conditions in evaluating these sensuality. The inventors have found out that the present invention has been obtained and have come up with the present invention.

  In addition, the content of monosaccharides such as glucose and fructose and disaccharides such as sucrose and the ratio (sugar ratio) contained in the processed tea product are related as requirements for satisfying the above conditions. The ratio was also found to be adjustable by the heat history in the step of drying the tea extract, leading to the present invention.

  In the present invention, the water-soluble solid content includes solid content soluble in water such as tannin, catechin, caffeine, free sugar, amino acid, water-soluble dietary fiber (eg, pectin), and the like. The water-insoluble solid content includes not only fibers such as cellulose and lignin but also water-insoluble solid particles adjusted in particle size.

In addition, monosaccharides include glucose, fructose and the like, and disaccharides include sucrose and the like.
In the present invention, unless otherwise specified, the sugar ratio is the ratio of the content of sucrose, which is a disaccharide, to the total content [M] of glucose, which is a monosaccharide, and fructose [D]. Represents.

  As described above, the subject of the present invention is that no tea husk that becomes waste at the time of drinking is generated, and the appearance such as light blue color, turbidity, particle sedimentation, taste such as flavor, texture (drinking feeling), concentration feeling, etc. A processed tea product that can obtain a good sensory evaluation, is environmentally friendly, and can more efficiently ingest active ingredients such as catechins contained in tea leaves that are usually discarded as tea leaves, and a method for producing the same There is in getting.

In order to solve the above problems, the present invention has the following configuration.
That is,
1. A processed tea product obtained by drying a tea extract, the content ratio of water-soluble solid content [A] and water-insoluble solid content [B] in the tea processed product, [A] / [B] Is a processed tea product characterized in that it is 0.5-40.0.
2. The ratio of the water-soluble solid content [A] to the water-insoluble solid content [B], [A] / [B] is in the range of 1.7 to 40.0. Goods.
3. The processed tea product has a ratio [M] / [D] of the total content [M] of glucose and fructose [D] and the content [D] of sucrose in the range of 0.05 to 0.20.0, and 1 or 2 processed tea products, wherein the content [D] of sucrose is in the range of 3.0 wt% to 15.0 wt%.
4). The tea extract according to any one of 1 to 3, wherein the tea extract is extracted from shredded tea leaves after green leaf killing or wilt treatment.
5. The tea extract according to any one of 1 to 4, wherein the tea extract is formed in a slurry form.
6). The processed tea product according to any one of 1 to 5, wherein the dried form is powder and / or granule.
7). A method for producing a processed tea product obtained by drying a tea extract, comprising: a cutting step for finely cutting and / or pulverizing tea leaves after blue-killing treatment or wilt treatment to obtain a tea leaf shredded product; water The tea extract extracted in the said extraction process is provided with the extraction process which adjusts soluble solid content and water-insoluble solid content, and the heat drying process which heat-drys the tea extract obtained at the said extraction process. A content ratio of solid content [A] to water-insoluble solid content [B], adjusted so that [A] / [B] is in the range of 0.25 to 20.0. Production method.
8). 7. The method for producing a processed tea product according to 7, wherein the heating and drying step is performed by a contact heating method in which the extract is dried by directly contacting the extract with a heating element.
9. The temperature of the heating body in the heating and drying step is in the range of 100 ° C. to 160 ° C., and the contact time after drying of the extract to the heating body is adjusted in the range of 4 to 90 seconds. The manufacturing method of 8 processed tea products.
10. The method for producing a processed tea product according to any one of 7 to 9, further comprising a hydration step of adding a predetermined amount of water to the fresh leaves in the cutting step.
It is about.

  According to the invention of the present application, tea shells that become waste at the time of drinking do not occur, and good sensory evaluation can be obtained for light blue, flavor, texture (drinking feeling), turbidity, particle sedimentation status, etc. In addition, since no waste is produced, it is environmentally friendly, and a processed tea product and a method for producing the same that can more efficiently ingest active ingredients such as catechins contained in tea leaves that are usually discarded as tea leaves are obtained. Can do.

  Hereinafter, embodiments of the present invention will be described. The processed tea product according to the embodiment of the present invention is a slurry-like tea leaf extract containing a water-insoluble solid content and a water-soluble solid content, which is extracted from a tea leaf cut product obtained by chopping tea leaves after slaughtering treatment or wilt treatment. This is obtained by heating and drying, but for the specific raw material names and numerical variable values such as content, ratio, time, etc., and device names, etc. described in this example, understanding of the present invention should be understood. It is only an example described for the sake of simplicity, and can be appropriately changed as long as it belongs to the technical scope of the present invention shown in the claims, and is not described for limiting the present invention.

The processed tea product according to this example will be described in detail below.
1. Sample preparation method (raw tea leaves)
There is no particular limitation as long as the tea type of the raw tea leaves that can be used in this example is Camellia Sinensis. In this example, the following fresh leaves were used, but the action and effects of the present invention can be obtained without any particular limitation on the place of origin, tea season (Ichibancha, Nibancha), variety, tea type, etc. It is possible. Place of origin: Shizuoka Prefecture Tea season: Autumn / Winter bancha (picked in early October), Ichibancha (picked in mid-May) Also, there are no particular restrictions on requirements other than the above, tea leaf cultivation conditions, harvest time, etc.

(Blue-killing treatment, etc.) The plucked fresh leaves are subjected to blue-killing treatment in the case of non-fermented tea such as green tea, and wilt treatment in the case of semi-fermented tea such as oolong tea and fermented tea such as black tea.
Blue killing treatment is a treatment that stops the progress of fermentation by applying heat to fresh leaves to inactivate the enzyme and keeps the leaf color green. Specifically, it takes about tens of seconds to hundreds of tens of seconds. There are a method of steaming with heating steam, a method of “steaming heat”, or a method of directly heating fresh leaves by “stir-friing”.
The wilting treatment is a treatment performed on semi-fermented tea such as oolong tea or fermented tea such as black tea, and refers to a treatment of wiping tea leaves with sunlight or the like for a predetermined period while maintaining enzyme activity. After the wilting treatment for a predetermined period, before the twisting treatment, the enzyme is deactivated by frying the kettle or the like to stop the fermentation.
In addition, before the enzyme deactivation treatment, a fermentation process that promotes the enzyme reaction may be performed. In that case, the enzyme deactivation treatment is performed at an appropriate fermentation stage according to the quality of the processed tea product to be produced. Just do it. In addition, you may perform temporary shredding beforehand for the purpose of removing a stem etc. before a blue-killing process.

  In this embodiment, the fresh leaves are shredded to about 5 mm to 20 mm with a food processor (food processor (product name: Magimix 4100, manufactured by FMI Co., Ltd.), and stems are collected by wind sorting. After removing the portion, steaming was performed for 60 seconds at a vapor pressure of 0.2 kgf / cm 2 (Kawasaki Machine Industry Co., Ltd., tea machine 2K type). You may perform the process after the subsequent cutting process.

(Cutting process)
After performing a blue-killing treatment by steaming or the like, it is quickly cooled, and after cooling, the fresh leaves are secondarily shredded using a sharp blade. In addition, you may add water as needed before shredding. The amount of water added can be adjusted so that the tea leaves and the blade can be efficiently contacted by chopping. For example, in the case of a shredding device of a type in which the blade rotates, the tea leaf can be moved so that it can easily come into contact with the blade by adding water to the tea leaf weight at an equal magnification to 10 times. However, when adding water, it is preferable to adjust the water temperature to 20 ° C. or lower so that heat is not applied to the fresh leaves, and ice may be mixed into the water as necessary.
In this example, 300 g of ion-exchanged water at 5 ° C. was added to 100 g of steamed leaves, and the juicer was mixed using a juicer mixer (product name: JC-L80MR, manufactured by Toshiba Home Appliance Co., Ltd.). Next, shredding was performed, and the tea leaves were cut for 1 minute after sufficient movement started.

(Extraction process)
The water-soluble solid content and the water-insoluble solid content of the solution containing tea leaf shredded material obtained by the cutting step are adjusted. The adjustment method can be appropriately selected from methods such as filtration through a mesh, squeezing by pressurization, separation by specific gravity difference such as decantation and centrifugation, and a plurality of means may be combined. Further, the water-insoluble solid content may be adjusted by dispersing the separated water-insoluble solid content again in the obtained extract. Further, the extraction step may be omitted.
In this example, the solution containing the cut tea leaves obtained by treating 1 kg of steamed leaves obtained by the cutting step was filtered using a stainless steel mesh having an aperture of 1.4 mm, and the filtrate While obtaining 4.4 kg, the filtration residue of the said filtrate was further accommodated in the nylon mesh of 1 mm opening, and it pressed and compressed, and 3.0 kg of pressing extracts were obtained. The pressed extract and the filtrate were mixed to obtain 7.4 kg of tea extract.

(Heat drying process)
The tea extract is heat-dried by directly contacting the heated body.
In this example, an aluminum tray was placed as a heating element on a nichrome wire heater as a drying device, and drying was performed under the following heating conditions. Heater surface temperature: 100 ° C to 160 ° C, preferably 110 ° C to 150 ° C, more preferably 120 ° C to 140 ° C. Tea extract / heated body area ratio: 130 g / m 2 Heating time after drying: 4 seconds to 90 seconds, preferably 4 seconds to 25 seconds. If the heating temperature is too high, a miscellaneous taste is generated, and if it is too low, a blue odor is produced.
In addition, the flavor can be adjusted by maintaining the heating state until the dried product is separated from the heated body after drying.If this time is too short, the blue odor remains, and if it is too long, it is miscellaneous. Taste occurs and the light blue color tends to turn red. This time can be appropriately adjusted in accordance with the heating body surface temperature.

2. Method for Measuring Sample Composition The samples in this example were subjected to composition quantification, qualitative analysis, and the like by the following methods.

(Measurement of water-insoluble solid content)
In the state of the tea extract before drying, 10 g of each sample was collected in a centrifuge tube and centrifuged at 3000 rpm. After measuring the dry weight of the filter paper (ADVANTEC Toyo Co., Ltd. model number: No. 5C diameter 90 mm), it collected by filtering the supernatant solid substance after centrifugation with the said filter paper. Next, 10 g of ion-exchanged water was added to the centrifuge tube and shaken sufficiently. After centrifugation again under the same conditions, the supernatant solid was collected by suction filtration in the same manner with the filter paper. After the same treatment was repeated again, the solid matter remaining in the centrifuge tube was washed with water, and finally all the solid content was collected on the filter paper, washed with water and subjected to suction filtration, and the solid content was collected. In this state, the filter paper was dried at 60 ° C. for 3 hours, and the mass after drying was measured. Based on the above results, the water-insoluble solid content per 10 g of the sample was calculated by the following formula 1.
(Formula 1) Water-insoluble solid content [B] per 10 g of sample = (weight of filter paper after drying−weight of filter paper before filtration)
Moreover, about the sample after drying, 0.5g was extract | collected for every sample to the centrifuge tube, 10g of ion-exchange water was added, and it fully shaken, performed the same process as the above, and computed by the following Formula 2. .
(Formula 2) Water-insoluble solid content (%) in dried material [B] = (weight of filter paper after drying−weight of filter paper before filtration) ÷ 0.5 × 100

(Measurement of water-soluble solid content)
At the time of measuring the content of the water-insoluble solid, the total weight and Brix (%) of the filtrate collected by suction filtration were measured and calculated by the following formulas 3 and 4.
(Formula 3) Water-soluble solid content [A] per 10 g of sample = (weight of filtrate × Brix (%) ÷ 100)
(Formula 4) Water-soluble solid content (%) [A] = (filter paper weight × Brix (%) ÷ 100) ÷ 0.5 × 100 in the dried sample

(Adjusting the content ratio of water-insoluble solids and water-soluble solids)
The amount of the water-insoluble solid is changed by changing parameters such as the amount of water added (hydrolysis ratio), shredding time, mesh size in the extraction step, presence of pressing during solid-liquid separation, and pressing strength. It is possible to adjust.
In this example, by adjusting the above-described parameters, the content ratio [A] of the water-soluble solid content [A] and the water-insoluble solid content [B] in the tea extract before drying. / [B] is in the range of 0.25 to 20.0, preferably 1.5 to 20, and more preferably 2.0 to 7.0. And in the tea processed product after drying the tea extract adjusted in this way, content ratio [A] / [B] of water-soluble solid content [A] and water-insoluble solid content [B] is set. The range is 0.5 to 40.0, preferably 1.7 to 30.0, and more preferably 2.2 to 10.0.
When the ratio is larger than the above value, the progress of the Maillard reaction becomes excessive at the time of heating and drying, the feeling of roasting and the feeling of base become excessive, while the feeling of concentration is insufficient. Conventional dry instant green tea has this tendency because it does not contain water-insoluble solids.
Moreover, when the said ratio is smaller than the said value, how to apply heat becomes inadequate, a blue odor tends to come out, and unnatural texture is left.

(Particle size distribution)
The particle size distribution in the tea extract was measured using a particle size distribution meter (SALD-210: manufactured by Shimadzu Corporation).
The particle shape can be adjusted by the same method as the above-described adjustment of the water-soluble solid content and the water-insoluble solid content.
In this example, the 50% particle size is 5 μm to 300 μm, the 90% particle size is 30 μm to 700 μm, preferably the 50% particle size is 30 μm to 250 μm, and the 90% particle size is 200 μm to 500 μm. It is what.
When the particle size is larger than the above range, it feels rough during drinking and tends to settle.
In addition, when the particle size is smaller than the above range, the Maillard reaction becomes excessive, the water-soluble solid content is excessively heated, and a miscellaneous taste is produced, and the light blue color becomes red and the feeling of concentration decreases, but the cloudy state Is good.

(Sugar ratio)
For quantification of glucose, fructose and sucrose, known measurement methods can be used.
In this example, measurement was performed using the following analysis conditions, and the ratio [M] / [D] of the sucrose content [D] to the total content [M] of glucose and fructose was calculated.
In this example, the sugar ratio is in the range of 0.05 to 0.20, and the sucrose content [D] is about 3.0 wt% to 15.0 wt%. is there.
The composition of sugars reflects the heat history in the processing process of processed tea products. If the sugar ratio is too high, it is suggested that heat is applied intermittently throughout the process. The original freshness tends to be impaired. On the other hand, if the sugar ratio is too low, it is suggested that excessive heat is applied in a short time, and tends to exhibit a strong miscellaneous taste, a burning odor, a reddish light blue, and the like.
(Analysis conditions)
・ Analyzer: HPLC sugar analyzer manufactured by Dionex ・ Column: Carbopack PA1 (4.6 mm × 250 mm) (P / N35391 manufactured by Dionex)
-Column temperature: 30 ° C
・ Flow rate: 1.0 mL / min
・ Gradient conditions: See Table 1 below

Samples 1 to 8 whose compositions were adjusted in accordance with the above-described methods, and commercially available Ichibanchacha, Bancha, and Ichibancha, instant tea manufactured from Bancha, were prepared as comparative examples. The sensory evaluation test was implemented about the influence on the sensory item with respect to the change of the content ratio of water-soluble solid content and water-insoluble solid content. In addition, the manufacturing method of instant tea is as follows.
Extraction of 50 g of tea leaves using 1 L of ion-exchanged water at 80 ° C. for 15 minutes, the extract obtained by solid-liquid separation (150 mesh) and filter paper filtration (Advantech No. 2) was concentrated 10 times and Drying was performed in the same manner to obtain about 10 g of a dried product.

  In this sensory evaluation test, 0.5 g of dried tea product after drying was dissolved in 100 mL of hot water at a temperature of 98 ° C. or cold water at 20 ° C. by six trained panelists in charge of beverage development. The solution was visually observed and sampled.

Based on the method described above, Samples 1 to 8 were prepared in which the ratio of water-insoluble solids and water-soluble solids was set to the values shown in Table 2. As for the tea leaves used as raw materials, Samples 1 to 7 use autumn / winter bancha, and Sample 8 uses the most tea. As samples for the comparative examples, Ichibancha and Bancha sencha extracted by the usual extraction method, and dried instant green tea produced by the conventional production method from Ichibancha and Bancha extract were prepared. Table 3 shows the preparation conditions of the sample for the comparative example.

  As a drying method, an aluminum tray was placed as a heating body on a nichrome wire heater, and the drying conditions were unified to a heating body surface temperature of 125 ° C. and a heating time after drying of 4.5 seconds.

(sensory evaluation)
The evaluation index of each item is as follows.
= Appearance evaluation =
◎ Natural green turbidity ○ Green turbidity △ Yellowish green turbidity or light green and weak turbidity × Transparent yellowish brown

= Taste in hot water supply =
◎ Good flavor with no odor and freshness ○ No odor but slight miscellaneous △ No odor but slightly heated odor

= Food texture and concentration in hot water =
◎ Moderate concentration ○ Slightly unsatisfactory △ Slight roughness or weakness

= Natural taste in draining water =
◎ Good taste with no odor and freshness ○ No odor but slight miscellaneous △ No odor but slightly heated odor × No tea leaves open, so flavor is light or unbalanced

= Food texture / concentration feeling when draining water =
◎ Moderate density ○ Slightly unsatisfactory △ Slightly rough or weak density × Low density due to the tea leaves not opening

Aggregation was performed for each of the evaluation items described above, and an overall score was calculated according to the following formula 5.
(Formula 5) Rating = (◎ Number * 5) + (○ Number * 3) + (△ Number * 1)
The evaluation of the score calculated by the above formula was as follows.
= Comprehensive evaluation =
◎ Scores 21-25
○ Rating 11-20
△ Score 6-10
× Rating 0-5

また、比較例における評価結果を表５に示す。

(Evaluation results)
Table 4 shows the results of sensory evaluation of Sample 1 to Sample 8.

Table 5 shows the evaluation results in the comparative example.

(Discussion)
As shown in Table 4 and Table 5, the ratio of the water-soluble solid content [A] to the water-insoluble solid content [B], [A] / [B] is included in the range of 0.5 to 40.0. No. 8 has better sensory evaluation results than the comparative sample deviating from the range. In addition, Samples 2 to 4 and Samples 6 and 8 in which [A] / [B] are in the range of 1.7 to 30.0 were particularly excellent in overall evaluation. Sample 8 using the most tea as the raw material showed the best results, but Samples 2 and 3 using autumn / winter bancha as the raw material were not inferior to that. As for the comparative example, in the case of the most tea, the sensory evaluation in the hot water was very good, but the tea leaves did not open sufficiently in the water and the concentration was insufficient. The sensory evaluation result was better. As described above, according to the present embodiment, tea husk that becomes waste at the time of drinking is not generated, and the appearance such as light blue color, turbidity, particle sedimentation, taste such as flavor, texture (drinking feeling), concentration feeling, etc. As a result, a good sensory evaluation could be obtained.

Samples 9 to 14 in which the drying conditions were changed in the content ratio of the water-soluble solid content and the water-insoluble solid content in Sample 2 with good results in Example 1 were prepared. The impact on the items was evaluated. In addition, instant tea was prepared using bancha produced as a raw material, and compared with the above samples. In addition, the manufacturing method of instant tea is as follows.
50 g of tea leaves were extracted for 15 minutes using 1 L of ion exchange water at 80 ° C., and the extract obtained by solid-liquid separation (150 mesh) and filter paper filtration (Advantech No. 2) was concentrated 10 times. Matcha 0.5 g was dispersed and spray dried at 150 ° C. to obtain about 10 g of a dried product.

Table 6 shows the conditions for preparing Samples 9 to 14 and the comparative sample.

(sensory evaluation)
The evaluation index of each item is as follows.
= Appearance evaluation =
◎ Natural green turbidity ○ Light green turbidity or green natural turbidity △ Yellowish green turbidity × Reddish dark turbidity

= Taste in hot water supply =
◎ Fresh scent or moderate sweet scent ○ Slightly blue odor △ Slightly heated odor or mixed feeling of heating and green tea

= Food texture and concentration in hot water =
◎ Moderate concentration ○ Slightly unsatisfactory △ Unsatisfactory

The above-mentioned evaluation items were tabulated and a total score was calculated according to the following formula 6.
(Formula 6) Score = (◎ Number * 5) + (○ Number * 3) + (△ Number * 1)
The evaluation of the score calculated by Equation 6 was as follows.
= Comprehensive evaluation =
◎ Score 11 ~ 15
○ Score 6-10
△ Score 1-5
× Rating 0

(Evaluation results)
Table 7 shows the results of sensory evaluation of Samples 9 to 14.

(Discussion)
As shown in Table 5 and Table 6, the ratio of the total content [M] of glucose and fructose [M] and the content [D] of sucrose [M] / [D] is included in the range of 0.05 to 0.20. Samples 9 to 14 obtained all had good sensory evaluation. In addition, the samples 9 to 13 having the sugar ratio of 0.08 to 0.20 obtained better evaluation. The comparative example was prepared as an instant tea with matcha by spray drying method assuming instant tea on the market, but unlike the above sugar ratio, the appearance was variously inferior to the product of the present invention. . Therefore, according to the present embodiment, tea husk that becomes waste at the time of drinking is not generated, and the appearance such as light blue color, turbidity, particle sedimentation, taste such as flavor, texture (drinking feeling), concentration feeling, etc. are good. Sensory evaluation could be obtained.

  The present invention can be used for a processed tea product obtained by drying a tea extract extracted from chopped tea leaves, and a method for producing the same.

Products and tea bag form, the dried instant green tea, although Ru Ha effective as a means for drinking with ease tea, if the tea bag form, it is necessary to discard the spent tea bags, discarded tea leaves In that respect, compared with the case of drowning in a teapot, there was a problem that the amount of waste tends to increase rather than a significant reduction in labor.
On the other hand, the dried instant green tea has advantages such as the fact that it does not generate a tea shell itself and is easily dissolved in water. However, when compared to sencha that has been brewed in a teapot, it is inferior in light blue and flavor, and generally, since water-insoluble solids are removed during production, there is no turbidity peculiar to green tea, and at the time of drinking It lacked the sense of concentration, and when dissolved in cold water, there was a problem that the fragrance did not stand and the balance was poor.

Further, "the leaves wet grinding after steaming, the paste tea that is obtained by separating the leaves and stems by straining or centrifuging sifter, after drying, further roasting to a manufacturing method of a tea powder obtained by Rukoto" is It is disclosed (Patent Document 2).
However, in the invention according to Patent Document 2, the purpose is to remove the blue smell and bad taste caused by stems and veins contained in tea leaves, and after drying pasty tea which is an intermediate product In addition, since it is heated and roasted into powder, the taste component and color component are deteriorated by the heating, and it has a problem that the light blue color and flavor when dissolved are inferior to ordinary sencha, After all, the problems of conventional instant green tea could not be solved.

In order to solve the above problems, the present invention has the following configuration.
That is,
1. A tea processed product comprising a heat- dried tea extract , wherein the tea extract is obtained by squeezing a tea extract extracted from a water-leaved tea leaf cut product and an extraction residue of the tea leaf cut product. The content ratio of the water-soluble solid content [A] and the water-insoluble solid content [B] calculated based on Brix in the tea processed product , which is a mixture with the obtained pressed extract , [A] / [B ] Is a tea processed product characterized by being 0.5-40.0.
2. Content ratio of said water soluble solid content [A] and said water insoluble solid content [B], [A] / [B] is the range of 1.7-40.0, 1 tea Processed goods.
3. Wherein the tea workpiece, the ratio of the total content of glucose and fructose [M] and the content of sucrose [D], is in the range of 0.05~0.2 0 [M] / [D ], and 1 or 2 processed tea products , wherein the content [D] of sucrose is in the range of 3.0 wt% to 15.0 wt%.
4). The tea extract, leaves the Yaao processing, or any tea workpiece 1 to 3, characterized in that the extract that is extracted from the cutting of the tea leaves after withering process.
5 . 4. The processed tea product according to any one of 1 to 4, wherein the heat- dried product is in the form of powder and / or granules .
It relates to.

(Cutting process)
After performing a blue-killing treatment by steaming or the like, it is quickly cooled, and after cooling, the fresh leaves are secondarily shredded using a sharp blade. In addition, you may add water as needed before shredding. The amount of water added can be adjusted so that the tea leaves and the blade can be efficiently contacted by chopping. For example, in the case of a shredding device of a type in which the blade rotates, the tea leaf can be moved so that it can easily come into contact with the blade by adding water to the tea leaf weight at an equal magnification to 10 times. However, when adding water, it is preferable to adjust the water temperature to 20 ° C. or lower so that heat is not applied to the fresh leaves, and ice may be mixed into the water as necessary.
In this example, 300 g of ion-exchanged water at 5 ° C. was added to 100 g of steamed leaves, and the juicer was mixed using a juicer mixer (product name: JC-L80MR, manufactured by Toshiba Home Appliance Co., Ltd.). Next, shredding was performed, and the tea leaves were cut for 1 minute after sufficient movement started.

(Measurement of water-insoluble solid content)
In the state of the tea extract before drying, 10 g of each sample was collected in a centrifuge tube and centrifuged at 3000 rpm. After measuring the dry weight of the filter paper (ADVANTEC Toyo Co., Ltd. model number: No. 5C diameter 90 mm), it collected by filtering the supernatant solid substance after centrifugation with the said filter paper. Next, 10 g of ion-exchanged water was added to the centrifuge tube and shaken sufficiently. After centrifugation again under the same conditions, the supernatant solid was collected by suction filtration in the same manner with the filter paper. After the same treatment was repeated again, the solid matter remaining in the centrifuge tube was washed with water, and finally all the solid content was collected on the filter paper, washed with water and subjected to suction filtration, and the solid content was collected. In this state, the filter paper was dried at 60 ° C. for 3 hours, and the mass after drying was measured. Based on the above results, the water-insoluble solid content per 10 g of the sample was calculated by the following formula 1.
(Formula 1) Water-insoluble solid content [B] per 10 g of sample = (weight of filter paper after drying−weight of filter paper before filtration)
Moreover, about the sample after drying, 0.5g was extract | collected for every sample to the centrifuge tube, 10g of ion-exchange water was added, and it fully shaken, performed the same process as the above, and computed by the following Formula 2. .
(Formula 2) Water-insoluble solid content (%) in dry sample [B] = (weight of filter paper after drying−weight of filter paper before filtration) ÷ 0.5 × 100

(Measurement of water-soluble solid content)
At the time of measuring the content of the water-insoluble solid, the total weight and Brix (%) of the filtrate collected by suction filtration were measured and calculated by the following formulas 3 and 4.
(Formula 3) Water-soluble solid content [A] per 10 g of sample = (weight of filtrate × Brix (%) ÷ 100)
(Equation 4) water soluble solids in the dry sample (%) [A] = (filtration liquid weight × Brix (%) ÷ 100) ÷ 0.5 × 100

(Discussion)
As shown in Table 6 and Table 7 , the ratio of the total content [M] of glucose and fructose [M] and the content [D] of sucrose, [M] / [D] included in the range of 0.05-0.20. Samples 9 to 14 obtained all had good sensory evaluation. In addition, the samples 9 to 13 having the sugar ratio of 0.08 to 0.20 obtained better evaluation. The comparative example was prepared as an instant tea with matcha by spray drying method assuming instant tea on the market, but unlike the above sugar ratio, the appearance was variously inferior to the product of the present invention. . Therefore, according to the present embodiment, tea husk that becomes waste at the time of drinking is not generated, and the appearance such as light blue color, turbidity, particle sedimentation, taste such as flavor, texture (drinking feeling), concentration feeling, etc. are good. Sensory evaluation could be obtained.

Claims (5)

A tea processed product comprising a heat-dried tea extract, wherein the tea extract is obtained by squeezing a tea extract extracted from a water-leaved tea leaf cut product and an extraction residue of the tea leaf cut product. Consisting of a mixture with the resulting pressed extract,
The content ratio of water-soluble solid content [A] calculated based on Brix and water-insoluble solid content [B], [A] / [B] in the processed tea product is 0.5 to 40.0. A processed tea product.   The content ratio [A] / [B] of the water-soluble solid content [A] and the water-insoluble solid content [B] is in the range of 1.7 to 40.0. Processed tea products.   In the processed tea product, the ratio of the total content [M] of glucose and fructose [M] and the content [D] of sucrose, [M] / [D] is in the range of 0.05 to 0.20, and The tea processed product according to claim 1 or 2, wherein the sucrose content [D] is in the range of 3.0 wt% to 15.0 wt%.   The tea processing solution according to any one of claims 1 to 3, wherein the tea extract is an extract extracted from a cut product of tea leaves after a green-killing treatment or a wilting treatment of fresh leaves. Goods.   The processed tea product according to any one of claims 1 to 4, wherein the heat-dried product is in the form of powder and / or granules.