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(12) Patent Application Publication (10) Pub. No.: US 2007/0128327 A1 Takashima Et Al

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(12) Patent Application Publication (10) Pub. No.: US 2007/0128327 A1 Takashima Et Al US 20070 128327A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2007/0128327 A1 Takashima et al. (43) Pub. Date: Jun. 7, 2007 (54) PACKAGE DRINK (86). PCT No.: PCT/UP04/17875 (75) Inventors: Shinichiro Takashima, Tokyo (JP); S 371(c)(1), Masaki Iwasaki, Tokyo (JP); Kojirou (2), (4) Date: Jun. 1, 2006 Hashizume, Haga-gun (JP): Naoki O O Hosoya, Tokyo (JP); Shinji Yamamoto, (30) Foreign Application Priority Data Tokyo (JP); Yoshikazu Ogura, Tokyo Dec. 2, 2003 (JP)...................................... 2003-402533 (JP); Jun Saito, Kamisu-shi (JP); Dec. 22, 2003 (JP). ... 2003-424,557 Hitoshi Takaya, Kamisu-shi (JP); Feb. 26, 2004 (JP). ... 2004-050719 Masami Shimizu, Tokyo (JP); Oct. 29, 2004 (JP)...................................... 2004-316,760 Norihiko Satake, Tokyo (JP); Eiichi Hoshino, Tokyo (JP); Yikiteru Publication Classification Sugiyama, Tokyo (JP) (51) Int. Cl. Correspondence Address: (52) ic 3/00 (2006.01) 426/597 OBLON, SPIVAK, MCCLELLAND, MAIER & Oa - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - NEUSTADT, P.C. 194O DUKE STREET (57) ABSTRACT ALEXANDRIA, VA 22314 (US) To provide a packaged high-catechin beverage in which a low-caffeine green tea extract is added. A packaged beverage (73) Assignee: Kao Corporation, Tokyo (JP) containing from 0.03 to 1.0 wt % of non-polymer catechins, in which a low-caffeine green tea extract obtained by a (21) Appl. No.: 10/581,200 method of brining a green tea extract into contact with a 91/9 to 97/3 by weight mixture of an organic solvent and water, (22) PCT Fed: Dec. 1, 2004 activated carbon, and acid clay or activated clay is added. US 2007/O128327 A1 Jun. 7, 2007 PACKAGE DRINK 0013 Patent Document 7 JP-A-2004-147508 FIELD OF THE INVENTION 0014) Patent Document 8 JP-A-06-142405 0015 The present invention provides a packaged bever 0001. This invention relates to a packaged beverage in age containing from 0.03 to 1.0 wt % of non-polymer which a low-caffeine green tea extract is added, and also to catechins, wherein the packaged beverage contains a low a process for production of the low-caffeine green tea caffeine green tea extract obtained by a method of bringing eXtract. a green tea extract into contact with a 91/9 to 97/3 by weight mixture of an organic solvent and water (i.e. a mixture of an BACKGROUND OF THE INVENTION organic solvent and water at a weight ratio of 91/9 to 97/3), 0002 Catechins are known to have a suppressing effect activated carbon, and acid clay or activated clay. on increase in cholesterol level and an inhibitory effect on 0016. The present invention also provides a process for C.-amylase activity (Patent Documents 1 to 2). To develop producing a low-caffeine green tea extract containing from Such physiological effects of catechins, it is necessary for an 25 to 90 wt % of non-polymer catechins based on a dry adult to drink 4 to 5 cups of tea per day. Accordingly, there weight of the extract, which comprises bringing a green tea is a desire for technology that permits addition of catechins extract into contact with a 91/9 to 97/3 by weight mixture of at a high concentration to beverages to facilitate ingestion of an organic solvent and water, activated carbon, and acid clay a large amount of catechins. As one of the methods, cat or activated clay. echins are added in a dissolved form to a beverage by using a concentrate of green tea extract (Patent Document 3) or the 0017. The present invention further provides a low-caf like. feine green tea extract, wherein the low-caffeine green tea extract contains from 40 to 90 wt % of non-polymer cat 0003. As processes for extracting catechins with a stable echins based on a solid content of the low-caffeine green tea taste from green tea or semi-fermented or fermented tea extract, and a weight ratio of the non-polymer catechins to leaves, there are known a two-step extraction process in caffeine is from 25 to 200. which extraction is conducted with slightly warm water, and Subsequent to heating, extraction is conducted again and an 0018. The present invention still further provides a pro extraction process under strongly acidic conditions (Patent cess for selectively removing caffeine from a caffeine Documents 4-6). However, these extraction processes are containing catechin composition, which comprises dispers limited to the extraction of catechins from tea leaves, and are ing a green tea extract in a 91/9 to 97/3 by weight mixture intended to achieve only stabilization of a taste of a purified of an organic solvent and water and bringing the resulting product and maintenance of a good taste. dispersion into contact with activated carbon and acid clay 0004 Further, catechins are generally known to be spar or activated clay. ingly soluble in organic solvents. It is also known that the extraction of catechins can be promoted in a weakly acidic EMBODIMENTS OF THE INVENTION range. A high proportion of an organic solvent, however, 0019. The present invention relates to a method for involves such a problem that the efficiency of extraction of selectively removing caffeine from a green tea extract with catechins is substantially lowered (Patent Document 7). out significantly changing the composition of catechins and 0005. In tea leaves, however, caffeine component is also moreover, without deteriorating the color, and also to a contained generally at from 2 to 4 wt % although catechins low-caffeine green tea extract produced by the method and are contained in an amount as much as about 15 wt %. As a packaged beverage, especially a packaged non-tea bever caffeine exhibits a central stimulant effect, it is used for the age in which the low-caffeine green tea extract is added. Suppression of sleepiness. On the other hand, its excessive 0020. The present invention further relates to a process ingestion is considered to bring about adverse effects such as for selectively removing caffeine from a green tea extract nervosity, nausea and hyposomnia. Investigations have, without significantly changing the composition of catechins therefore, been made for processes that selectively remove only caffeine from caffeine-containing compositions. and moreover, without deteriorating the color. 0021. The present inventors have found that a low 0006 Proposed is, for example, a process in which caf caffeine green tea extract can be obtained as a purified green feine is selectively removed by bringing a caffeine-contain tea extract, in which caffeine has been selectively removed ing, aqueous solution into contact with activated clay or acid without significantly changing the composition of catechins, clay (Patent Document 8). However, this process is accom and moreover, without deteriorating the color, by bringing a panied by such a problem that the color may be deteriorated green tea extract into contact with a 91/9 to 97/3 by weight in some instances, although caffeine can be selectively mixture of ethanol and water, activated carbon, and acid clay removed by simply using activated clay or acid clay. or activated clay, and also that the low-caffeine green tea 0007 Patent Document 1 JP-A-60-156614 extract provides high-catechin beverages, especially pack aged high-catechin non-tea beverages with a good taste. 0008 Patent Document 2.JP-A-03-133928 0022. According to the present invention, it is possible to 0009 Patent Document 3 JP-A-59-219384 selectively remove caffeine from a green tea extract without 0010) Patent Document 4.JP-A-2003-219799 significantly changing the compositions of catechins, and moreover, without changing the color, and to efficiently 0011 Patent Document 5 JP-A-2003-219800 extract non-polymer catechins. In addition, the addition of 0012 Patent Document 6.JP-A-2003-225053 the resulting low-caffeine green tea extract enables obtention US 2007/O128327 A1 Jun. 7, 2007 of a packaged beverage which is low in caffeine content, 0029. As the green tea extract, it is possible to use contains catechins at a high concentration, and is good in specifically a commercially-available crude Solid catechin color and taste. preparation such as “Polyphenon' (product of Tokyo Food Techno Co., Ltd.), “TEAFURAN” (product of ITO EN, 0023 The green tea extract for use in the present inven LTD.) or “SUNPHENON” (product of Taiyo Kagaku Co., tion contains one or more non-polymer catechins. The term “non-polymer catechins' as used herein is a generic term Ltd.). which collectively encompasses non-epicatechins such as 0030. As the green tea extract, it is also possible to use an catechin, gallocatechin, catechin gallate and gallocatechin extract obtained from tea leaves belonging to the Genus gallate, and epicatechins such as epicatechin, epigallocat Camellia and subjected beforehand to a treatment of con echin, epicatechin gallate and epigallocatechin gallate. On tacting with carbon dioxide in a Supercritical state. The tea the other hand, the term “gallates' is a generic term which leaves for use in Supercritical extraction can be either raw tea collectively embraces catechin gallate, gallocatechin gallate, leaves or manufactured tea leaves insofar as they belong to epicatechin gallate and epigallocatechin gallate among the the Genus Camelia. As the manufactured tea leaves, non above-described non-polymer catechins. Further, the term fermented tea is more preferred. Preferred examples of 'gallocatechins' is a generic term which collectively encom steamed tea leaves include Sencha (middle-grade green tea), passes gallocatechin, gallocatechin gallate, epigallocatechin fukamushicha (deep-steamed green tea), gyokuro (shaded and epigallocatechin gallate among the above-described green tea), kabusecha (partially shaded green tea), mushi non-polymer catechins. The term 'gallocatechins percent tamaryokucha (Steamed, rounded, beads-shaped green tea), age' means the weight percentage of the gallocatechins in and bancha (coarsegreen tea).
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