JP2019041660A - Granulated tea leaf and method for producing the same - Google Patents
Granulated tea leaf and method for producing the same Download PDFInfo
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Abstract
Description
本発明は、水に対する分散性に優れた造粒茶葉、及び当該造粒茶葉の製造方法に関する。 The present invention relates to a granulated tea leaf excellent in dispersibility in water, and a method for producing the granulated tea leaf.
通常、飲用の「お茶」とは、茶葉を発酵若しくは発酵させないで乾燥し、これを粉砕若しくは粉砕せずに水、温水若しくは熱水で抽出した抽出液をいうが、抽出残渣を廃棄しなければならないという不便がある。 Usually, drinking "tea" refers to an extract obtained by drying tea leaves without fermentation or fermentation and extracting them with water, warm water or hot water without grinding or crushing, but without discarding the extraction residue There is the inconvenience of not being
一方、そのような抽出残渣の廃棄を必要としない飲用のお茶として、上記乾燥した茶葉をジェットミル等で平均粒径１０μｍ未満の粉末茶としたものをそのまま熱水に分散させ、茶筅等で撹拌懸濁して飲用するものもある。しかし、このような粉末茶では、平均粒径１０μｍとするためのコストは非常に高く分散性は非常に低いため、利便性に劣る。 On the other hand, as the drinking tea which does not require the disposal of such an extraction residue, the above-mentioned dried tea leaves are made into powder tea having an average particle diameter of less than 10 μm by a jet mill etc. Some are suspended for drinking. However, such powder tea has a very high cost for achieving an average particle diameter of 10 μm and a very low dispersibility, which is less convenient.
そこで、最近では、粉末茶葉と、賦形剤として単糖、二糖、澱粉分解物等とを混合して顆粒化した粉末茶が主流となってきており、より良い顆粒化粉末茶を得ようと、種々の工夫がされている。 Therefore, in recent years, powdered tea obtained by mixing and granulating powdered tea leaves with monosaccharides, disaccharides, starch decomposition products, etc. as an excipient has become mainstream, and a better granulated powder tea will be obtained. There are various ideas.
例えば、特許文献１には、賦形粉末と茶粉末よりなる顆粒を核とし、その表面に茶粉末を被覆してなる茶顆粒は、味・色・香りを維持したまま冷水への分散性が良好になることが開示されている。また、特許文献２には、緑茶葉粉末と、緑茶の抽出液とを混合し、これに賦形剤を加えた後、固形分４０〜８５質量％として真空乾燥することによって、抗酸化性に富み、かつ溶解色が良く、香り、呈味及び溶解性に優れた即席粉末茶が得られることが開示されている。更に、特許文献３には、抗酸化剤を含む水溶液中で、茶葉（ａ）を粉砕抽出並びに微粒化して水中粉砕茶葉（Ａ）を含む微粒化液を調製する工程、得られた微粒化液に、茶葉（ｂ）を粉砕乃至摩砕して得られた乾式粉砕茶葉（Ｂ）と、乾燥助剤とを加えて攪拌混合する工程、及び攪拌混合して得られた混合物を乾燥させる工程とを経ることにより、茶葉含有成分の変質を防ぎ、茶筅を使用せず水に手軽に溶解させることができる分散茶が得られることが開示されている。 For example, in Patent Document 1, tea granules having a core made of granules made of shaping powder and tea powder as a core and coated with tea powder on the surface have dispersibility in cold water while maintaining the taste, color and smell. It is disclosed that it becomes good. In addition, in Patent Document 2, after mixing green tea leaf powder and an extract of green tea, adding an excipient thereto, and then vacuum-drying it as a solid content of 40 to 85% by mass, it has an antioxidant property. It is disclosed that a ready-to-eat powder tea is obtained which is rich and has a good dissolution color and is excellent in smell, taste and solubility. Furthermore, Patent Document 3 discloses a process of preparing an atomized liquid containing ground tea leaf (A) by pulverizing, extracting and atomizing tea leaf (a) in an aqueous solution containing an antioxidant, and obtaining the atomized liquid obtained And dry-dried tea leaves (B) obtained by grinding or grinding tea leaves (b) and a drying aid, stirring and mixing, and drying the mixture obtained by stirring and mixing; It is disclosed that dispersed tea which can be easily dissolved in water without using a teacup can be obtained by preventing deterioration of the tea leaf-containing component.
また、特許文献４には、気流式粉砕機を用いて５〜１５ミクロンとした微粉末茶を流動層造粒コーティング装置により造粒することにより、分散・懸濁性に優れた１０〜３０ミクロンの粉末茶が得られることが開示されている。更に、特許文献５には、茶葉粉砕物４０〜９０質量％に賦形剤として難消化デキストリン１０〜６０質量％を混合して造粒された安息角が４５度未満である茶葉顆粒は、水又は熱水へ加えた時にダマにならずに容易に分散し、茶葉の緑色や風味・旨味を安定して保持できることが開示されている。 Moreover, in patent document 4, it is 10-30 microns which was excellent in the dispersion and suspension property by granulating fine powder tea made into 5-15 microns using an air flow crusher with a fluid bed granulation coating apparatus. It is disclosed that a powdered tea of Furthermore, Patent Document 5 discloses that tea leaf granules having a repose angle of less than 45 degrees, which is granulated by mixing 40 to 90% by mass of ground tea leaves with 10 to 60% by mass of indigestible dextrin as an excipient, Alternatively, it is disclosed that when it is added to hot water, it can be easily dispersed without being damaged, and the green color, flavor and taste of tea leaves can be stably maintained.
しかし、特許文献１〜３で開示されている顆粒化茶粉末では、多段造粒であったり、造粒工程前に茶抽出工程を採用したりと、製造工程が煩雑であるという欠点がある。また、特許文献４で開示されている粉末茶は分散性の点では満足できるものではなく、更に、特許文献５で開示されている茶葉顆粒は、多量の賦形剤を必要とするために茶本来の風味が損なわれるという欠点がある。 However, the granulated tea powders disclosed in Patent Documents 1 to 3 have the disadvantages that the manufacturing process is complicated, such as multi-stage granulation or employing a tea extraction process before the granulation process. In addition, the powdered tea disclosed in Patent Document 4 is not satisfactory in terms of dispersibility, and furthermore, the tea leaf granules disclosed in Patent Document 5 require a large amount of excipients, so that tea is required. There is a disadvantage that the original flavor is lost.
本発明の課題は、水に対しても優れた分散性を示す造粒茶葉を提供することにある。 An object of the present invention is to provide a granulated tea leaf which exhibits excellent dispersibility in water.
本発明者らは、かかる課題を解決すべく種々検討したところ、意外にも、粉末茶葉を９０質量％以上含有させ、且つ造粒茶葉の平均粒子径を８０〜１８０μｍに設定することにより、造粒茶葉の水への分散性が顕著に向上することを見出した。本発明は、かかる知見に基づいて、更に検討を重ねることにより本発明を完成するに至った。 The present inventors have variously studied to solve the problem, and surprisingly, 90% by mass or more of powder tea leaves are contained, and the average particle diameter of the granulated tea leaves is set to 80 to 180 μm. It has been found that the dispersibility of grain tea leaves in water is significantly improved. The present invention has completed the present invention by conducting further studies based on such findings.
即ち、本発明は、下記に掲げる態様の発明を提供する。
（１）粉末茶葉を９０質量％以上含有し、且つ平均粒子径が８０〜１８０μｍである造粒茶葉。
（２）粉末茶葉の平均粒子径が１０〜３０μｍである、（１）に記載の造粒茶葉。
（３）粉末茶葉を９０質量％以上含む原料粉末を湿式造粒し、平均粒子径が８０〜１８０μｍである造粒茶葉を得る、造粒茶葉の製造方法。
（４）前記湿式造粒が流動層造粒によって行われる、（３）に記載の製造方法。
（５）バインダー液の噴霧条件が、下記式に従って算出される水分上昇速度が１．０３〜２．６２％／分であり、且つバインダー液の噴霧終了時の造粒茶葉の水分量が２４〜３５％となるように設定して造粒される、（４）に記載の製造方法。
(1) Granulated tea leaves containing 90% by mass or more of powder tea leaves and having an average particle diameter of 80 to 180 μm.
(2) Granulated tea leaf as described in (1) whose average particle diameter of a powder tea leaf is 10-30 micrometers.
(3) A method for producing granulated tea leaves by wet granulation of raw material powder containing 90% by mass or more of powdered tea leaves to obtain granulated tea leaves having an average particle diameter of 80 to 180 μm.
(4) The method according to (3), wherein the wet granulation is performed by fluid bed granulation.
(5) The spray condition of the binder solution is such that the rate of increase in water calculated according to the following equation is 1.03 to 2.62% / min, and the moisture content of the granulated tea leaf at the end of spraying of the binder solution is 24 to The production method according to (4), wherein the granulation is set to 35%.
本発明の造粒茶葉は、水に添加して混合すると、ダマを生じることなく容易に分散させることができる。また、本発明の造粒茶葉は、造粒に賦形剤を殆ど使用しないので、嵩が低く利便性に富んでいることに加え、賦形剤の呈味への悪影響を抑制して茶葉本来の良好な風味を呈することもできる。 The granulated tea leaves of the present invention can be easily dispersed without generating lumps when added to water and mixed. Moreover, since the granulated tea leaf of the present invention uses almost no excipient for granulation, in addition to being bulky and highly convenient, it also suppresses the adverse effect on the taste of the excipient to suppress tea leaves originally. Can also exhibit a good taste of
本発明の造粒茶葉は、粉末茶葉を９０質量％以上含有し、且つ平均粒子径が８０〜１８０μｍであることを特徴とする。以下、本発明の造粒茶葉について、詳述する。なお、単に「造粒茶葉」という場合は、最終の乾燥工程を含む一連の造粒を経て得られた製品を指し、「バインダー液（又は水）の噴霧終了時の造粒茶葉」という場合は、一連の造粒において最終乾燥工程を経ていない造粒茶葉を指す。 The granulated tea leaf of the present invention is characterized by containing 90% by mass or more of powdered tea leaf and having an average particle diameter of 80 to 180 μm. Hereinafter, the granulated tea leaves of the present invention will be described in detail. The term "granulated tea leaf" simply refers to a product obtained through a series of granulations including the final drying step, and the term "granulated tea leaf at the end of spraying of the binder liquid (or water)" , Refers to granulated tea leaves not subjected to final drying step in a series of granulation.
本発明の造粒茶葉に含まれる粉末茶葉の茶葉の種類については、特に制限されず、例えば、緑茶、大麦若葉、ケール、モロヘイヤ、よもぎ、麦茶、はと麦茶等の茶葉；ウーロン茶等の半発酵茶葉；紅茶等の発酵茶葉等が挙げられる。これらの中でも、好ましくは緑茶茶葉が挙げられる。なお、「抹茶」は、その原料が「碾茶」であって、揉み作業は行われない等、狭義の「粉末茶葉」には含まれないが、本発明において、「粉末茶葉」という用語は、広義の意味で使用しており、「抹茶」を包含する。 The type of tea leaves of the powdered tea leaves contained in the granulated tea leaves of the present invention is not particularly limited. For example, tea leaves such as green tea, young barley leaves, kale, molohea, wormwood, barley tea, wheat barley and the like; semi-fermented such as oolong tea Tea leaves; Fermented tea leaves such as black tea, etc. may be mentioned. Among these, preferably green tea and tea leaves are mentioned. In addition, "Matcha tea" is not included in the narrow sense "powder tea leaf" because the raw material is "原料 tea" and the kneading operation is not performed. In the present invention, the term "powder tea leaf" is It is used in a broad sense and includes "Matsucha".
粉末茶葉は、前記茶葉、半発酵茶葉、又は発酵茶葉を粉末化することにより得ることができる。当該粉末化の手法については、特に制限されないが、例えば、気流式やミキサー式による粉砕方式による粉末化処理が挙げられる。 Powdered tea leaves can be obtained by pulverizing the tea leaves, semi-fermented tea leaves, or fermented tea leaves. Although it does not restrict | limit especially about the method of the said pulverization, For example, the pulverization process by the grinding | pulverization system by air flow type or mixer type is mentioned.
粉末茶葉の平均粒子径については、特に制限されないが、例えば、５〜４０μｍが挙げられる。より一層優れた分散性を備えさせるという観点から、粉末茶葉の平均粒子径として、好ましくは１０〜４０μｍ、更に好ましくは２０〜３０μｍが挙げられる。本発明において、「粉末茶葉の平均粒子径」は、レーザー回折・散乱式粒子径分布測定装置を使用して測定されるメジアン径である。 Although it does not restrict | limit in particular about the average particle diameter of a powdery tea leaf, For example, 5-40 micrometers is mentioned. The average particle diameter of the powdery tea leaves is preferably 10 to 40 μm, more preferably 20 to 30 μm from the viewpoint of providing further excellent dispersibility. In the present invention, “the average particle size of powdery tea leaves” is a median size measured using a laser diffraction / scattering type particle size distribution measuring apparatus.
本発明の造粒茶葉における粉末茶葉の含有量は９０質量％以上に設定される。このように、粉末茶葉の含有量を高めつつ、造粒茶葉の平均粒子径を後述する所定の範囲に設定することにより、優れた分散性を備えさせることが可能になる。造粒茶葉の嵩を更に低下させつつ、優れた分散性を備えさせるという観点から、本発明の造粒茶葉における粉末茶葉の含有量として、好ましくは９５質量％以上、更に好ましくは９８質量％以上、より好ましくは９９質量％以上、特に好ましくは１００質量％が挙げられる。本発明において、粉末茶葉の含有量は、造粒茶葉に不可避的に吸湿又は残存している水の含有量を除いて算出される値である。 The content of powdered tea leaves in the granulated tea leaves of the present invention is set to 90% by mass or more. As described above, by setting the average particle size of the granulated tea leaves in a predetermined range described later while enhancing the content of the powdered tea leaves, it is possible to provide excellent dispersibility. The content of the powdered tea leaves in the granulated tea leaves of the present invention is preferably 95% by mass or more, more preferably 98% by mass or more, from the viewpoint of providing excellent dispersibility while further reducing the bulk of the granulated tea leaves More preferably, it is 99 mass% or more, Especially preferably, 100 mass% is mentioned. In the present invention, the content of powdered tea leaves is a value calculated excluding the content of water which is inevitably absorbed by moisture or remains in the granulated tea leaves.
本発明の造粒茶葉において、粉末茶葉の含有量が１００質量％未満である場合には、賦形剤を含んでいることが好ましい。本発明で使用される賦形剤の種類については、食品に使用可能であることを限度として特に制限されないが、例えば、澱粉分解物、澱粉、糖類及び増粘多糖類等の粘着性素材が挙げられる。これらの賦形剤は、１種単独で使用してもよく、また２種以上を組み合わせて使用してもよい。 In the granulated tea leaf of the present invention, when the content of the powdered tea leaf is less than 100% by mass, it is preferable to contain an excipient. The type of excipient used in the present invention is not particularly limited as long as it can be used in foods, but, for example, tacky materials such as starch decomposition products, starch, saccharides and polysaccharide thickeners may be mentioned. Be These excipients may be used alone or in combination of two or more.
これらの賦形剤の中でも、好ましくは、澱粉分解物が挙げられる。本発明で使用される澱粉分解物のＤＥ（デキストロース当量）については、特に制限されないが、例えばＤＥ８〜２５、好ましくはＤＥ８〜１８が挙げられる。 Among these excipients, preferred are starch degradation products. The DE (dextrose equivalent) of the starch hydrolyzate used in the present invention is not particularly limited, and examples thereof include DE 8 to 25 and preferably DE 8 to 18.
本発明の造粒茶葉において賦形剤を含有させる場合、その含有量としては、１０質量％以下、好ましくは０．１〜１０質量％、更に好ましくは０．１〜５質量％、特に好ましくは０．１〜２質量％、特に好ましくは０．１〜１質量％が挙げられる。本発明において、賦形剤の含有量は、造粒茶葉に不可避的に吸湿又は残存している水の含有量を除いて算出される値である。 When an excipient is contained in the granulated tea leaf of the present invention, the content thereof is 10% by mass or less, preferably 0.1 to 10% by mass, more preferably 0.1 to 5% by mass, particularly preferably 0.1 to 2% by mass, particularly preferably 0.1 to 1% by mass can be mentioned. In the present invention, the content of the excipient is a value calculated excluding the content of water which is inevitably absorbed or remaining in the granulated tea leaves.
本発明の造粒茶葉の平均粒子径は、８０〜１８０μｍに設定される。このような平均粒子径を具備しつつ、粉末茶葉の含有量が前述する範囲を充足することによって、水、温水、及び熱水に対して、優れた分散性を備えさせることが可能になる。分散性をより一層向上させるという観点から、本発明の造粒茶葉の平均粒子径として、好ましくは９０〜１８０μｍ、更に好ましくは９５〜１８０μｍが挙げられる。 The average particle diameter of the granulated tea leaf of the present invention is set to 80 to 180 μm. When the content of the powdered tea leaves satisfies the above-described range while having such an average particle diameter, it becomes possible to provide excellent dispersibility to water, warm water, and hot water. From the viewpoint of further improving the dispersibility, the average particle diameter of the granulated tea leaf of the present invention is preferably 90 to 180 μm, more preferably 95 to 180 μm.
本発明において、造粒茶葉の平均粒子径は、篩い分け法によって測定される値である。造粒茶葉の平均粒子径の測定方法は、具体的には、以下に示す通りである。先ず、目開きが５３μm、６３μm、７５μm、１０６μm、１５０μm、及び２５０μmの篩を準備し、目開きが小さいものが下、目開きが大きいものを上になるように積み重ね、最上段の篩に造粒茶葉を載せて蓋をし、振動機にて振動を与える。次いで、各篩残った造粒茶葉の重量を測定する。以下の算出式に従って、平均粒子径（重量ベースの累積５０％値）を算出する。
本発明の造粒茶葉の粒度分布については、前述する平均粒子径を満たす限り、特に制限されないが、造粒茶葉の総重量に対する１０６μｍ以上１５０μｍ未満の造粒茶葉の重量の比率として、例えば、２０％以上、具体的には２０％以上３５％未満が挙げられる。ここで、「造粒茶葉の総重量に対する７５μｍ以上１５０μｍ未満の造粒茶葉の重量の比率」は、前記平均粒子径の測定と同様の条件の篩い分け法によって求められる値である。 The particle size distribution of the granulated tea leaves of the present invention is not particularly limited as long as the above-mentioned average particle diameter is satisfied, but the ratio of the weight of granulated tea leaves of 106 μm or more and less than 150 μm to the total weight of granulated tea leaves is, for example, 20 % Or more, specifically 20% or more and less than 35%. Here, “the ratio of the weight of granulated tea leaves of 75 μm or more and less than 150 μm to the total weight of granulated tea leaves” is a value determined by the screening method under the same conditions as the measurement of the average particle diameter.
本発明の造粒茶葉は、粉末茶葉及び必要に応じて添加される賦形剤を含む原料粉末を用いて、前述する平均粒子径に造粒することによって製造される。本発明の造粒茶葉を製造する際の造粒法については、前述する平均粒子径の造粒物が得られることを限度として特に制限されず、湿式造粒法又は乾式造粒法のいずれであってもよいが、好ましくは湿式造粒法が挙げられる。 The granulated tea leaves of the present invention are produced by granulating the above-mentioned average particle diameter using raw material powders containing powdered tea leaves and optionally added excipients. The granulation method for producing the granulated tea leaves of the present invention is not particularly limited as long as the granulated material having the above-mentioned average particle diameter can be obtained, and either of the wet granulation method or the dry granulation method is used. Although there may be, preferred is a wet granulation method.
本発明の造粒茶葉を湿式造粒法で製造する場合、流動層造粒、転動式造粒、攪拌造粒、押出造粒等のいずれの造粒法で行ってもよいが、前述する平均粒子径の造粒茶葉を効率的に製造するという観点から、好ましくは流動層造粒法が挙げられる。 When the granulated tea leaves of the present invention are produced by a wet granulation method, any granulation method such as fluidized bed granulation, rolling granulation, stirring granulation, extrusion granulation may be carried out, but From the viewpoint of efficiently producing granulated tea leaves having an average particle size, a fluidized bed granulation method is preferably mentioned.
本発明の造粒茶葉を湿式造粒法で製造する場合、バインダー液として水を使用し、原料粉末（粉末茶葉及び必要に応じて添加される賦形剤を含む原料）に対して噴霧等によって添加すればよい。また、本発明の造粒茶葉に賦形剤を含有させる場合、バインダー液として使用される水には、造粒茶葉に含有させる賦形剤の一部又は全部を溶解又は分散させておいてもよい。バインダー液として使用される水に賦形剤を溶解又は分散させる場合、バインダー液として使用される水における賦形剤の濃度は、例えば、０．１〜２０w／v％程度に設定すればよい。 When the granulated tea leaves of the present invention are produced by a wet granulation method, water is used as a binder liquid, and the raw material powder (raw material containing powdered tea leaves and an excipient added as necessary) is sprayed or the like It may be added. In addition, when the granulated tea leaves of the present invention contain an excipient, even if some or all of the excipients contained in the granulated tea leaves are dissolved or dispersed in water used as a binder liquid. Good. When dissolving or dispersing an excipient in water used as a binder liquid, the concentration of the excipient in water used as a binder liquid may be set to, for example, about 0.1 to 20 w / v%.
本発明の造粒茶葉を湿式造粒法で製造する場合、湿式造粒の条件については、前述する平均粒子径の造粒物が得られることを限度として特に制限されないが、例えば、流動層造粒法の場合であれば、下記式に従って算出される水分上昇速度が、１．０３〜２．６２％／分、好ましくは１．３６〜２．６２％／分、更に好ましくは１．６６〜２．６２％／分となり、且つバインダー液の噴霧終了時の造粒茶葉の水分量が２４〜３５％、好ましくは２６〜３５％、更に好ましくは３０〜３４％となるように、バインダー液の噴霧条件を制御することによって、前述する平均粒子径の造粒物を効率的に製造することができる。
なお、前記「造粒茶葉の水分量」及び「原料粉末の水分量」は、赤外線水分計を用いて設定温度１０５℃で測定される値である。また、前記「バインダー液の噴霧時間」は、バインダー液の噴霧開始から所定量のバインダー液の噴霧が終了までに要する時間であり、バインダー液の噴霧時間内で、持続的にバインダー液の噴霧を行ってもよく、また断続的にバインダー液の噴霧を行ってもよい。断続的にバインダー液の噴霧を行う態様としては、例えば、バインダー液の噴霧、停止、払い落し、停止を１サイクルとして、当該サイクルを繰り返し行う態様が挙げられる。断続的にバインダー液の噴霧を行う場合には、前記「バインダー液の噴霧時間」には、前記停止及び払い落しに要する時間も包含される。 The "water content of granulated tea leaves" and the "water content of raw material powder" are values measured at a set temperature of 105 ° C. using an infrared moisture meter. The "binder liquid spray time" is the time required from the start of the binder liquid spray to the end of the spray of the predetermined amount of binder liquid, and the binder liquid is continuously sprayed within the binder liquid spray time. The binder solution may be sprayed intermittently. As an aspect which sprays a binder liquid intermittently, the aspect which repeatedly performs the said cycle is made, for example as spraying of a binder liquid, stop, wash-off, and stop as 1 cycle. In the case of intermittently spraying the binder solution, the "time for spraying the binder solution" also includes the time required to stop and remove the binder solution.
流動層造粒法において、水分上昇速度及び噴霧終了時の造粒茶葉の水分量が前記範囲となるように、バインダー液の噴霧条件を調整するには、原料粉末に対するバインダー液の噴霧量、バインダー液の噴霧速度、及び造粒機内への給気温度等を適宜制御すればよい。具体的には、造粒機内への給気温度を２０〜４０℃の範囲に設定する場合であれば、原料粉末１００質量部当たり、使用（噴霧）するバインダー液量を３０〜８０質量部、好ましくは４０〜８０質量部、更に好ましくは５０〜７０質量部の範囲内で適宜設定し、且つ原料粉末１ｋｇ当たりのバインダー液の噴霧速度を４．８〜６３ｍｌ／分の範囲内で適宜設定すればよい。ここで、原料粉末１ｋｇ当たりのバインダー液の噴霧速度とは、湿式造粒装置内に供給される水の噴霧速度を、湿式造粒に供される原料粉末の重量（Ｋｇ）で除した値を指す。 In the fluidized bed granulation method, in order to adjust the spraying conditions of the binder solution so that the rate of water rise and the water content of the granulated tea leaves at the end of spraying become the above ranges, the amount of binder solution sprayed onto the raw material powder, binder The spray speed of the liquid, the temperature of air supplied into the granulator, etc. may be appropriately controlled. Specifically, if the supply air temperature into the granulator is set to a range of 20 to 40 ° C., the amount of binder liquid to be used (sprayed) is 30 to 80 parts by mass per 100 parts by mass of the raw material powder, The amount is preferably 40 to 80 parts by mass, more preferably 50 to 70 parts by mass, and the spray speed of the binder solution per 1 kg of the raw material powder is appropriately set to 4.8 to 63 ml / min. Just do it. Here, the spray speed of the binder liquid per 1 kg of the raw material powder is a value obtained by dividing the spray speed of water supplied into the wet granulation apparatus by the weight (Kg) of the raw material powder to be subjected to the wet granulation. Point to.
なお、造粒茶葉の風味を維持させる上で、造粒機内への給気温度は２０〜４０℃の範囲に設定することが望ましい。但し、造粒機内への給気温度を２０℃未満に設定する場合であれば、バインダー液の噴霧速度を前記範囲よりも低くする、及び／又は原料粉末１００質量部当たりのバインダー液量を前記範囲よりも減らす、等によって、水分上昇速度及び噴霧終了時の造粒茶葉の水分量が前記範囲を満たすように調整することができる。また、造粒機内への給気温度を４０℃超に設定する場合であれば、バインダー液の噴霧速度を前記範囲よりも高くする、及び／又は原料粉末１００質量部当たりのバインダー液量を前記範囲よりも増やす、等によって、水分上昇速度及び噴霧終了時の造粒茶葉の水分量が前記範囲を満たすように調整することができる。また、水分上昇速度及び噴霧終了時の造粒茶葉の水分量は、使用する流動層造粒機の大きさ、原料粉末の量等によって影響を受けるので、使用する流動層造粒機の大きさ、原料粉末の量等を踏まえた上で、原料粉末に対するバインダー液の噴霧量、バインダー液の噴霧速度、及び造粒機内への給気温度等を、前記範囲を参考にして適宜設定すればよい。 In addition, in order to maintain the flavor of granulated tea leaves, it is desirable to set the supply air temperature to the inside of a granulator in the range of 20-40 degreeC. However, if the temperature for supplying air into the granulator is set to less than 20 ° C., the spray speed of the binder liquid is made lower than the above range and / or the amount of binder liquid per 100 parts by mass of the raw material powder is The rate of increase of water content and the water content of the granulated tea leaves at the end of spraying can be adjusted to satisfy the above ranges by reducing the water content to a range or the like. In addition, if the temperature for supplying air into the granulator is set to more than 40 ° C., the spray speed of the binder liquid is made higher than the above range and / or the amount of binder liquid per 100 parts by mass of the raw material powder is The rate of increase of water content and the water content of the granulated tea leaves at the end of spraying can be adjusted to satisfy the above ranges by increasing the water content over the range or the like. In addition, the rate of water rise and the amount of moisture in the granulated tea leaves at the end of spraying are affected by the size of the fluid bed granulator used, the amount of raw material powder, etc. Therefore, the size of the fluid bed granulator used Based on the amount of raw material powder, etc., the spray amount of the binder liquid to the raw material powder, the spray speed of the binder liquid, the air supply temperature into the granulator, etc. may be appropriately set with reference to the above range. .
流動層造粒法において、前記条件でバインダー液の噴霧が完了した後に、流動層造粒機内で所望の水分含量になるまで引き続き乾燥を行うことにより、本発明の造粒茶葉が得られる。 In the fluid bed granulation method, after spraying of the binder solution is completed under the above conditions, the granulated tea leaves of the present invention are obtained by continuing drying until the desired water content is achieved in the fluid bed granulator.
造粒によって得られた造粒茶葉は、必要に応じて、整粒等を行い、粒子径を調節してもよい。 Granulated tea leaves obtained by granulation may be subjected to particle sizing etc. to adjust the particle diameter, if necessary.
以下、本発明の実施例について詳述するが、本発明はこれらに限定されるものではない。 Hereinafter, although the example of the present invention is explained in full detail, the present invention is not limited to these.
試験例１
１．造粒茶葉の製造
まず、国産碾茶微粉末（以下、「原料抹茶」という）２ｋｇを５型流動層造粒機（フローコーター、フロイント産業社）に投入し、排気ファンから吸引した２０℃エアーを底部より吹き込み流動させた。次に、原料抹茶に対して８０℃の水（バインダー液）１０００ｍｌを噴霧して造粒し、噴霧終了後に給気温度１００℃及び３０分の条件で引き続き乾燥を行うことにより、造粒茶葉を得た。なお、使用した原料抹茶の平均粒子径、水の噴霧速度、水の噴霧時間は、以下の表１の通りである。水の噴霧は、「４０秒噴霧＋１秒停止＋１０秒払い落し＋１秒停止」を１サイクルとして、当該サイクルを繰り返すことにより断続的に行った。また、原料抹茶の平均粒子径は、レーザー回折・散乱式粒子径分布測定装置（ＭＴ３０００、日機装製）を使用して測定したメジアン径である。
Test Example 1
1. Production of granulated tea leaves First, 2 kg of domestic sweet potato fine powder (hereinafter referred to as "raw material matcha") is introduced into a 5 type fluidized bed granulator (flow coater, Freund Corporation), and 20 ° C air sucked from an exhaust fan It blew in from the bottom and made it flow. Next, the powdered green tea is granulated by spraying 1000 ml of water (binder solution) at 80 ° C., and after the spraying is completed, the granulated tea leaf is continuously dried under the conditions of air supply temperature 100 ° C. and 30 minutes. Obtained. In addition, the average particle diameter of the raw material green tea used, the spraying speed of water, and the spraying time of water are as Table 1 below. The water spray was intermittently performed by repeating the cycle with "40 seconds spray + 1 second stop + 10 seconds withdrawal + 1 second stop" as one cycle. Moreover, the average particle diameter of the raw material green tea is a median diameter measured using a laser diffraction / scattering particle diameter distribution measuring apparatus (MT3000, manufactured by Nikkiso Co., Ltd.).
また、水の噴霧前の原料抹茶及び噴霧終了時の造粒茶葉をサンプリングし、赤外線水分計（「ＦＤ−６１０」、ケツト科学研究所株式会社製）を用いて設定温度１０５℃で水分量の測定を行った。得られた各水分量の値を用いて、前記算出式に従って、水分上昇率を算出した。結果を表１に示す。 In addition, raw material green tea before spraying water and granulated tea leaves at the end of spraying are sampled, and an infrared moisture meter ("FD-610", manufactured by Ketto Science Research Institute Co., Ltd.) is used to set the moisture content at a setting temperature of 105 ° C. It measured. The rate of increase in water was calculated according to the above-mentioned calculation formula using the obtained values of water content. The results are shown in Table 1.
２．造粒茶葉の平均粒子径及び粒度分布の測定
目開きが５３μm、６３μm、７５μm、１０６μm、１５０μm、２５０μmの篩を細かいものから順に上に載せて６段に積み、最上段の篩に、造粒茶葉を２０ｇ投入して蓋をし、振動機（ＩＩＤＡ ＳＩＥＶＥ ＳＨＡＫＥＲ 飯田製作所製）にて１０分間、蓋上部より衝撃を加えて振動させ、各篩上に存在する造粒茶葉の重量を測定し、測定に供した造粒茶葉に対する各篩上の造粒茶葉の重量割合（分布割合（％））を算出した。また、前述の算出式に従って、平均粒子径を求めた。得られた結果を表２に示す。
2. Measurement of average particle size and particle size distribution of granulated tea leaves 53 μm, 63 μm, 75 μm, 106 μm, 150 μm, 250 μm sieves are loaded sequentially from the fine one on top of the other and stacked in 6 stages to granulate the top sieve. Add 20 g of tea leaves, cover with a lid, apply impact from top of lid for 10 minutes with vibrator (IIDA SIEVE SHAKER Iida Mfg.) And vibrate, measure the weight of granulated tea leaves present on each sieve, The weight ratio (distribution ratio (%)) of the granulated tea leaves on each sieve to the granulated tea leaves used for the measurement was calculated. Also, the average particle size was determined according to the above-mentioned calculation formula. The obtained results are shown in Table 2.
３．造粒茶葉の分散性評価
２０℃及び６０℃の水１００ｍｌに造粒茶葉０．５ｇを撹拌しながら加え、１０秒間攪拌後、懸濁液の分散性を目視で観察し、下記判定基準に従って分散性を評価した。
（分散性の判定基準）
◎：ダマが発生しない
〇：発生するダマの数が１０個未満
×：発生するダマの数が１０個以上
なお、５ｍｍ以上の塊を「ダマ」とした。
3. Evaluation of dispersibility of granulated tea leaf 0.5 g of granulated tea leaf is added to 100 ml of water at 20 ° C. and 60 ° C. while stirring, and after stirring for 10 seconds, the dispersibility of the suspension is visually observed and dispersed according to the following judgment standard The sex was evaluated.
(Discrimination criteria)
◎: No damage is generated. :: The number of generated damage is less than 10 ×: The number of generated damage is 10 or more. A mass of 5 mm or more is regarded as "dam."
得られた結果を表３に示す。また、参考のため、実施例１の造粒茶葉を２０℃の水に分散させた際の外観（分散性の評価◎）を撮影した写真を図１、実施例１の造粒茶葉を６０℃の水に分散させた際の外観（分散性の評価〇）を撮影した写真を図２、比較例３の造粒茶葉を２０℃の水に分散させた際の外観（分散性の評価×）を撮影した写真を図３に示す。 The obtained results are shown in Table 3. Further, for reference, FIG. 1 is a photograph of the appearance (the evaluation of dispersibility 分散) when the granulated tea leaves of Example 1 are dispersed in water at 20 ° C., and the granulated tea leaves of Example 1 are 60 ° C. The photograph which photographed the appearance (dispersion evaluation 評 価) when dispersed in water of FIG. 2, the appearance when dispersing the granulated tea leaves of Comparative Example 3 in water at 20 ° C. (dispersion evaluation ×) The photograph which image | photographed is shown in FIG.
この結果から、平均粒子径が８０〜１８０μｍを満たす造粒茶葉（実施例１〜５）は、２０℃及び６０℃の双方の水に対して、優れた分散性を示すことが確認された。 From this result, it was confirmed that granulated tea leaves (Examples 1 to 5) having an average particle diameter of 80 to 180 μm exhibit excellent dispersibility in water at both 20 ° C. and 60 ° C.
試験例２
１．造粒茶葉の製造
まず、国産碾茶微粉末（以下、「原料抹茶」という）２ｋｇを５型流動層造粒機（フローコーター、フロイント産業社）に投入し、排気ファンから吸引した２０℃エアーを底部より吹き込み流動させた。次に、原料抹茶に対して８０℃の水（バインダー液）を噴霧して造粒し、噴霧終了後に給気温度１００℃及び３０分の条件で引き続き乾燥を行うことにより、造粒茶葉を得た。なお、使用した原料抹茶の平均粒子径、噴霧した水の量、水の噴霧速度、水の噴霧時間は、以下の表４の通りである。水の噴霧は、「４０秒噴霧＋１秒停止＋１０秒払い落し＋１秒停止」を１サイクルとして、当該サイクルを繰り返すことにより断続的に行った。また、原料抹茶の平均粒子径は、レーザー回折・散乱式粒子径分布測定装置（ＭＴ３０００、日機装製）を使用して測定したメジアン径である。また、水の噴霧前の原料抹茶及び噴霧終了時の造粒茶葉をサンプリングし、赤外線水分計（「ＦＤ−６１０」、ケツト科学研究所株式会社製）を用いて設定温度１０５℃で水分量の測定を行った。得られた各水分量の値を用いて、前記算出式に従って、水分上昇率を算出した。
Test example 2
1. Production of granulated tea leaves First, 2 kg of domestic sweet potato fine powder (hereinafter referred to as "raw material matcha") is introduced into a 5 type fluidized bed granulator (flow coater, Freund Corporation), and 20 ° C air sucked from an exhaust fan It blew in from the bottom and made it flow. Next, granulated tea leaves are granulated by spraying water at 80 ° C. (binder solution) to granulate, and after completion of spraying, granulated tea leaves are obtained by continuing drying under the conditions of air supply temperature 100 ° C. and 30 minutes. The In addition, the average particle diameter of the raw material matcha used, the amount of sprayed water, the spraying speed of water, and the spraying time of water are as Table 4 below. The water spray was intermittently performed by repeating the cycle with "40 seconds spray + 1 second stop + 10 seconds withdrawal + 1 second stop" as one cycle. Moreover, the average particle diameter of the raw material green tea is a median diameter measured using a laser diffraction / scattering particle diameter distribution measuring apparatus (MT3000, manufactured by Nikkiso Co., Ltd.). In addition, raw material green tea before spraying water and granulated tea leaves at the end of spraying are sampled, and an infrared moisture meter ("FD-610", manufactured by Ketto Science Research Institute Co., Ltd.) is used to set the moisture content at a setting temperature of 105 ° C. It measured. The rate of increase in water was calculated according to the above-mentioned calculation formula using the obtained values of water content.
２．造粒茶葉の平均粒子径及び分散性の評価
得られた造粒茶葉について前記試験例１と同条件で平均粒子径及び分散性の評価を行った。結果を表５に示す。その結果、実施例１、６、７、８、及び９は、平均粒子径が８０〜１８０μｍを満し、２０℃及び６０℃の双方の水に対して、優れた分散性を示すことが確認された。一方、比較例５は、平均粒子径が８０μｍ未満であり、分散性が悪かった。なお、比較例６は、水噴霧終了時の水分量が３６．１％と高く、製造時に流動不良が発生して造粒茶葉を製造することができなかった。
2. Evaluation of Average Particle Size and Dispersibility of Granulated Tea Leaves The obtained granulated tea leaves were evaluated for average particle size and dispersibility under the same conditions as in Test Example 1 above. The results are shown in Table 5. As a result, it is confirmed that Examples 1, 6, 7, 8 and 9 have an average particle diameter of 80 to 180 μm and show excellent dispersibility in water at both 20 ° C. and 60 ° C. It was done. On the other hand, in Comparative Example 5, the average particle size was less than 80 μm, and the dispersibility was poor. In Comparative Example 6, the water content at the end of water spraying was as high as 36.1%, and a flow failure occurred at the time of production, making it impossible to produce granulated tea leaves.
試験例３
１．造粒茶葉の製造
表６に示す割合で国産碾茶微粉末（以下、「原料抹茶」という）と賦形剤（粉飴（澱粉分解物）、ＤＥ２５、松谷化学工業株式会社製「ＭＰＤ」）を混合した原料粉末２Ｋｇを５型流動層造粒機（フローコーター、フロイント産業社）に投入し、排気ファンから吸引した２０℃のエアーを底部より吹き込み流動させた。次に、原料粉末に対して８０℃の水１０００ｍｌを噴霧して造粒し、噴霧終了後に給気温度１００℃及び３０分の条件で引き続き乾燥を行うことにより、造粒茶葉を得た。なお、使用した原料抹茶の平均粒子径、水の噴霧速度、水の噴霧時間は、以下の表６の通りである。水の噴霧は、「４０秒噴霧＋１秒停止＋１０秒払い落し＋１秒停止」を１サイクルとして、当該サイクルを繰り返すことにより断続的に行った。また、原料抹茶の平均粒子径は、レーザー回折・散乱式粒子径分布測定装置（ＭＴ３０００、日機装製）を使用して測定したメジアン径である。また、原料抹茶の平均粒子径は、レーザー回折・散乱式粒子径分布測定装置（ＭＴ３０００、日機装製）を使用して測定したメジアン径である。また、水の噴霧前の原料粉末及び噴霧終了時の造粒茶葉（比較例７の場合は原料粉末）をサンプリングし、赤外線水分計（「ＦＤ−６１０」、ケツト科学研究所株式会社製）を用いて設定温度１０５℃で水分量の測定を行った。得られた各水分量の値を用いて、前記算出式に従って、水分上昇率を算出した。
Test Example 3
1. Production of granulated tea leaves Domestic sweet potato fine powder (hereinafter referred to as "raw material matcha") and excipient (powder (starch decomposition product), DE25, "MPD" manufactured by Matsutani Chemical Industry Co., Ltd.) at a ratio shown in Table 6 2 kg of the mixed raw material powder was introduced into a 5 type fluidized bed granulator (flow coater, Freund Sangyo Co., Ltd.), and air at 20 ° C. sucked from an exhaust fan was blown from the bottom to flow. Next, 1000 ml of water at 80 ° C. was sprayed onto the raw material powder to granulate, and after the end of spraying, granulated tea leaves were obtained by continuing drying under the conditions of air supply temperature 100 ° C. and 30 minutes. In addition, the average particle diameter of the raw material green tea used, the spraying speed of water, and the spraying time of water are as Table 6 below. The water spray was intermittently performed by repeating the cycle with "40 seconds spray + 1 second stop + 10 seconds withdrawal + 1 second stop" as one cycle. Moreover, the average particle diameter of the raw material green tea is a median diameter measured using a laser diffraction / scattering particle diameter distribution measuring apparatus (MT3000, manufactured by Nikkiso Co., Ltd.). Moreover, the average particle diameter of the raw material green tea is a median diameter measured using a laser diffraction / scattering particle diameter distribution measuring apparatus (MT3000, manufactured by Nikkiso Co., Ltd.). In addition, the raw material powder before spraying water and the granulated tea leaves at the end of spraying (raw material powder in the case of Comparative Example 7) are sampled, and an infrared moisture meter ("FD-610", manufactured by Ketto Science Research Institute Co., Ltd.) The water content was measured at a set temperature of 105 ° C. using the above. The rate of increase in water was calculated according to the above-mentioned calculation formula using the obtained values of water content.
実施例１及び１０では、製造時にトラブルを生じさせることなく造粒茶葉が得られたが、比較例７では、賦形剤の割合が多く、原料抹茶の割合が少なかったために、製造時に流動不良が発生した。そこで、以下に示す平均粒子径の測定、並びに分散性評価は、実施例１及び１０の造粒茶葉を用いて行った。 In Examples 1 and 10, granulated tea leaves were obtained without causing trouble during the production, but in Comparative Example 7, the proportion of the excipient was high and the proportion of the raw material green tea was low, so flow failure at the time of production There has occurred. Then, the measurement of the average particle diameter shown below and dispersion evaluation were performed using the granulated tea leaf of Example 1 and 10.
２．造粒茶葉の平均粒子径及び分散性の評価
得られた造粒茶葉について前記試験例１と同条件で平均粒子径及び分散性の評価を行った。結果を表７に示す。その結果、賦形剤を１０質量％含んでいても、平均粒子径が８０〜１８０μｍを満たす造粒茶葉は、良好な分散性を有していることが確認された。
2. Evaluation of Average Particle Size and Dispersibility of Granulated Tea Leaves The obtained granulated tea leaves were evaluated for average particle size and dispersibility under the same conditions as in Test Example 1 above. The results are shown in Table 7. As a result, it was confirmed that the granulated tea leaves having an average particle diameter of 80 to 180 μm have good dispersibility, even if they contain 10% by mass of an excipient.
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| JP2019216748A (en) * | 2018-05-17 | 2019-12-26 | 大正製薬株式会社 | Solid material |
| JP2021000047A (en) * | 2019-06-24 | 2021-01-07 | 佐藤食品工業株式会社 | Granulated powder tea leaves and method for producing the same |
| US20210289808A1 (en) * | 2020-03-18 | 2021-09-23 | Amorepacific Corporation | Processed product of tea in the form of particles |
| US11612172B2 (en) | 2018-10-25 | 2023-03-28 | Amorepacific Corporation | Processed products of tea with quick dispersibility in water and method for manufacturing processed products of tea |
| US11653665B2 (en) | 2019-08-21 | 2023-05-23 | Amorepacific Corporation | Processed products of tea and method for manufacturing the same |
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| JP2006121930A (en) * | 2004-10-27 | 2006-05-18 | Q'sai Co Ltd | Plant powder and method for producing the same |
| JP2010068741A (en) * | 2008-09-17 | 2010-04-02 | Ito En Ltd | Tea leaf granule and method for producing tea leaf granule |
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| JP2010068741A (en) * | 2008-09-17 | 2010-04-02 | Ito En Ltd | Tea leaf granule and method for producing tea leaf granule |
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| JP2019216748A (en) * | 2018-05-17 | 2019-12-26 | 大正製薬株式会社 | Solid material |
| US11612172B2 (en) | 2018-10-25 | 2023-03-28 | Amorepacific Corporation | Processed products of tea with quick dispersibility in water and method for manufacturing processed products of tea |
| JP2021000047A (en) * | 2019-06-24 | 2021-01-07 | 佐藤食品工業株式会社 | Granulated powder tea leaves and method for producing the same |
| US11653665B2 (en) | 2019-08-21 | 2023-05-23 | Amorepacific Corporation | Processed products of tea and method for manufacturing the same |
| US20210289808A1 (en) * | 2020-03-18 | 2021-09-23 | Amorepacific Corporation | Processed product of tea in the form of particles |
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