JP5116164B2 - Moisture absorption inhibitor for dried fruits coated with sour ingredients and method for preventing moisture absorption of dried fruits coated with sour ingredients - Google Patents

Description

The present invention is excellent in preventing the sour component from absorbing moisture when the sour component is applied to the surface of the dried fruit, the moisture absorption inhibitor for the sour component coated dried fruit, the sour component coated dried fruit and the sour component coated dried The present invention relates to a method for preventing moisture absorption of fruits.

In general, dried fruits such as raisins are eaten as they are or processed for confectionery. However, when the dried fruit is eaten as it is, the sweetness is strong. Therefore, in order to eat snacks and eat multiple meals, it is desirable to season and process sourness in order to balance the sweetness of the dried fruit itself. However, if the dried fruit surface is seasoned by coating with a sour agent such as citric acid, the dried fruit surface becomes sticky during the coating process, the work efficiency decreases, the appearance deteriorates, and the fingers are pinched when pinching by hand. There were problems such as soiling and binding of dried fruits.
Conventionally, as a technique for coating dried fruits, there is sugar coating. For example, ascorbic acid-containing sugar coatings obtained by coating granular foods such as fruit chips with a sugar coating layer are known (for example, see Patent Document 1). This is intended to prevent quality degradation of ascorbic acid by sugar coating with a solution in which ascorbic acid is dissolved in advance.
However, the sugar-coating method is intended to prevent browning of ascorbic acid, and does not attempt to solve the moisture absorption of the sour component that occurs when the dried fruit itself is flavored with the sour component. . Further, the coating solution was dissolve ascorbic acid, and so hard sugar coating repeating drying, or could not recall the granular food center from the appearance, soft texture of the dried fruit for texture which was crispy squid There was room for improvement.

As other coating methods, malic acid powder and sparingly soluble organic acid powder (with a thickener dissolved in a food for the purpose of developing a quick and vivid acidity without causing stickiness or blocking, There is known a method for coating a sour agent that is dried after applying a powder raw material containing adipic acid and / or fumaric acid) (see, for example, Patent Document 2).
However, in the above coating method, the coating target is food with low moisture (moisture content of less than 5% by weight), mainly confectionery such as candy, chewing gum, tablet confectionery, chocolate, etc., and thus the moisture content is 5% by weight. As described above, when a dried fruit having a relatively high moisture content is coated, there is a problem in that the drying property is poor during the coating process, causing stickiness, and blocking occurs when stored for a long time after the production. In addition, the coating mainly with acidulant did not enhance nutrition.

As other coating methods, foods coated with ascorbyl stearate, an antioxidant, are known for the purpose of improving the moisture resistance and enzyme resistance of foods at the center (for example, patent documents). 3).
However, although the above coated ascorbic acid stearate has a moisture-proof effect, it is an oil-soluble component, so that it does not give a refreshing sour taste peculiar to vitamin C, or absorbs vitamin C into the body as compared with ascorbic acid. There was a problem that the rate was bad. Moreover, when it tried to coat | cover in large quantities in order to express a refreshing acidity, the adhesiveness of the coating layer was bad.

In addition, a dry sweet food is known in which a dipeptide sweetener-containing solution adjusted to a pH of 4 to 5 with a pH lowering agent such as fumaric acid is attached to the surface of a food such as dried fruits and then dried by heating ( For example, see Patent Document 4).
However, fumaric acid used in the above-mentioned dry sweet food has a very small amount of adhesion to food for the purpose of adjusting the pH of the dipeptide sweetener-containing solution, and does not lead to nutritional enhancement. There was a problem of causing stickiness and binding of foods. In addition, when a large amount of a pH lowering agent such as fumaric acid is used to increase the surface adhesion amount, there is a problem that the sweetener used in combination is decomposed and the flavor of the whole dried fruit is broken.

In addition, for the purpose of improving the oxidation stability of the dried fruit by the coating layer and extending the shelf life, the dried fruit, the coating layer containing an edible film such as lipids, and the functional and / or biological activity or functionality. A coated dried fruit to which food components and the like are added is known (for example, see Patent Document 5).
However, although the above-mentioned dried dried fruit has improved oxidative stability, there is a problem that depending on the components added, the sticky fruit may become sticky and the foods bind to each other.

JP-A-8-70792 JP 2006-141256 A JP-A-63-7769 JP 57-141248 A JP-T-2006-501834

The present invention has been made in view of the circumstances as described above, and its object is to prevent the sour component from absorbing moisture when the sour component is applied to the dried fruit surface. The object of the present invention is to provide a moisture absorption preventing agent for dried sour component-coated fruits, a sour component-coated dried fruit and a method for preventing moisture absorption of a sour component-coated dried fruit.

The present invention achieves the above object by a moisture absorption inhibitor for a sour component-coated dried fruit, which is a sour component moisture-absorbing agent used for a dried fruit coated with a sour component, wherein vitamin C is an active ingredient. To do.

Preferably, it further contains the following organic acid (1).
(1) Among fumaric acid, adipic acid, and glutamic acid, it is preferable to contain one or more kinds, and further contains the following (A) or (B).
(A) Carbohydrate (B) In addition to fats and oils having a melting point of 30 to 50 ° C., the sour component is preferably coated by soft sugar coating or powder coating.

Moreover, the said objective is achieved by the sour component coating dried fruit characterized by being covered with the moisture absorption inhibitor for the sour component coating dried fruit of the present invention.

In addition, the present invention achieves the above object by a method for preventing moisture absorption of a sour component-coated dried fruit, characterized in that vitamin C is used as a sour component that coats the surface of the dried fruit. Coating is done by soft sugar coating or powder coating.

That is, the present inventors studied to impart sourness to the surface of the dried fruit in order to alleviate the sweetness of the dried fruit and obtain a comprehensive flavor. As a result, it has been found that depending on the sourness imparting conditions, the dried fruit surface may absorb moisture or be difficult to absorb moisture. As a result of further studies, it was found that the hygroscopicity varies depending on the type of organic acid conventionally used as a sour component. This phenomenon is presumed to be due to the difference in the hygroscopicity on the surface of the dried fruit due to the different binding properties with water molecules in the air depending on the type of the sour component or the addition method.
Accordingly, as a result of further pursuing the most effective hygroscopic component when imparting sourness to the dried fruit surface, the present inventors, as a result of using vitamin C as a moisture absorption inhibitor, absorbs moisture during the sour component coating operation. Therefore, the covering workability is good, the surface of the dried fruits is not sticky during long-term storage, the binding between the dried fruits is suppressed, the appearance is good, and vitamin C itself works as a sourness imparting agent. As a result, it was found that dried fruits with a good balance between acidity and sweetness can be obtained, and nutritional enhancement as vitamin C can be achieved. Moreover, it discovered that the effect which prevents moisture absorption further improved by combining a specific sour agent with vitamin C. In addition, the sour-tasting ingredient is coated with a soft sugar coating that alternately coats the powder ingredient and the sugar-containing aqueous solution, or by powder coating, making use of the original soft texture and appearance of the dried fruit. As a result, the present invention was reached.

According to the present invention, the dried fruit is coated with the coating layer containing vitamin C. Therefore, even when the dried fruit having a relatively high water content of 5 to 30% by weight is used as a center, it is not sticky from the time of the coating work, Moisture absorption can be prevented even during storage. Therefore, alteration of vitamin C itself is prevented, vitamin C persistence is excellent, and nutrition can be enhanced.
Furthermore, when a specific organic acid is used in combination, moisture absorption of dried fruits can be prevented even if other sour components are contained.
Furthermore, since it contains saccharides or fats and oils having a melting point of 30 to 50 ° C., the moisture absorption preventing property is further improved and the appearance is also good.
Since the moisture absorption inhibitor for sour-component-dried dried fruits of the present invention is excellent in moisture absorption prevention properties, dried fruits do not bind to each other. Therefore, it is possible to accommodate and seal a plurality of dried fruits in a container without wrapping the dried fruits individually, and it is excellent in the fast feeding property that the dried fruits are picked and eaten directly from the container.
In addition, even for dried fruits with a high sweetness for improving the storage stability, the sourness quickly developed from the surface layer relaxes the sweetness due to the moisture-absorbing agent for dried fruits coated with the sourness component of the present invention. It has a well-balanced and sweet flavor.
Moreover, according to this invention, it can be set as the form which utilized the soft food texture and external appearance of the dried fruit.

The present invention will be described in detail.
The moisture absorption inhibitor (hereinafter referred to as “moisture absorption inhibitor”) for dried fruits having a sour taste component according to the present invention contains vitamin C. Vitamin C acts effectively as a moisture absorption preventing component and as a sour component. The vitamin C is a kind of water-soluble vitamin and refers to the L form of ascorbic acid, and examples thereof include ascorbic acid and ascorbic acid salts. These may be used alone or in combination of two or more. Preferably, ascorbic acid is desirable in terms of obtaining a flavor, that is, a refreshing acidity peculiar to vitamin C. The dosage form of ascorbic acid is a dry product such as powder or granule.
Furthermore, it is preferable that vitamin C is contained in an amount of 0.5% by weight or more and 10% by weight or less in the total weight of the sour-component-dried fruit, in terms of excellent moisture absorption prevention and improving the appearance and flavor.
The vitamin C content refers to the amount of vitamin C adhering to the sour-tasting component-coated dried fruit at the final product stage by the moisture absorption inhibitor coating operation.
If the content of vitamin C exceeds 10% by weight in the total weight of the sour-component-coated dried fruit, the surface of the dried fruit becomes cloudy and the appearance is deteriorated, or the acidity becomes strong and the flavor tends to deteriorate.

When an organic acid is used for the moisture absorption inhibitor of the present invention, fumaric acid is suitable for moisture absorption prevention and a good balance between sweetness and sourness of dried fruits, and adipic acid and glutamic acid are suitable for moisture absorption prevention. Used.

Moreover, you may use the auxiliary raw material selected suitably for the moisture absorption inhibitor of this invention in the range which does not impair the objective of this invention. For example, various sugars (powder sugar, sugar alcohol, liquid sugar, honey, starch syrup, etc.), starches (starch, modified starch, modified starch, starch degradation product, etc.), fats and oils, milk, powdered taste ingredients (powdered tea) , Egg white powder, egg yolk powder, acidulant, seasoning, powder extract, etc.), flavor, stabilizer, gelling agent such as gelatin, thickening stabilizer such as gum arabic and pullulan, salt such as calcium and sodium, coloring And nutritional components (collagen, hyaluronic acid, dietary fiber, vitamins, minerals, DHA, bifidobacterial growth factor, garcinia cambodia extract powder, gymnema powder, etc.). If necessary, these may be added directly to the moisture absorption inhibitor or may be further added as a coating layer to the surface of the coating layer formed by the moisture absorption inhibitor.

Among the above-mentioned auxiliary materials, the inclusion of a saccharide or oil having a melting point of 30 to 50 ° C. is preferable in terms of workability during coating operation, moisture absorption prevention, appearance, and flavor.
The saccharide refers to the various saccharides described above, and examples thereof include sucrose, glucose, lactose, fructose, maltose, maltitol, erythritol, palatinit, lactitol, xylitol, and starch syrup.
It is preferable to use a gelling agent and a thickening stabilizer in combination with the saccharide in terms of workability and appearance of the coating operation.
The said fats and oils are fats and oils whose melting | fusing point is 30 degreeC or more and 50 degrees C or less, for example, hardened oils, such as palm oil or palm oil, coconut oil, rapeseed oil, soybean oil, or a melting point adjusted to 30-50 degreeC. These may be used alone or in combination of two or more.
If the melting point of the oil or fat is less than 30 ° C, it tends to dissolve during long-term storage and the effect of preventing moisture absorption cannot be obtained. If the melting point is higher than 50 ° C, the oil or fat will not dissolve in the oral cavity when ingested, so is there.

The dried fruit in the present invention is a dried fruit or vegetable fruit / skin, etc., dried by an appropriate method after a sugar addition treatment such as immersing in a sugar solution such as sugar or untreated. Is. Preferably, the water content is 5% by weight or more, more preferably 5 to 30% by weight, from the viewpoint of effectively obtaining the effect of the present application. Moreover, you may give fruit juice immersion process, the process by sulfite etc. for browning prevention, etc. before and after a drying process suitably. Examples include dried fruits such as cranberry, papaya, pineapple, mango, apple, raisins, melon, cantaloupe, prunes, pears, kiwi, apricots, strawberries, bananas, oranges, lemons, eggplants, peaches, and citrus peels. .

The sour-tasting component-coated dried fruit of the present invention is coated with a moisture absorption inhibitor. The coating method is a soft sugar coating in which the powder component mixed with the moisture absorption inhibitor raw material and, if necessary, the auxiliary material and a saccharide-containing aqueous solution are alternately charged into a rotary kettle or the like, and the moisture absorption inhibitor is formed by coating and drying. Alternatively, any method may be used such as powder coating in which only the powder component is directly coated with a rotary kettle or the like, or the powder component and oil are coated alternately. Incidentally, sugar protein-containing aqueous solution is preferably 50 to 70 wt% saccharide-containing aqueous solution is desirable in view of productivity and drying.
Preferably, a soft sugar coating in which the sour component-containing powder and the saccharide-containing aqueous solution are alternately applied and dried or a powder coating in which the sour component-containing powder is applied as it is is desirable. In the case of soft sugar coating or powder coating, unlike hard sugar coating that repeats drying by applying a sugar solution containing a sour ingredient, the coating layer is formed with irregularities along the shape of the dried fruit, so the shape of the dried fruit It is possible to obtain an appearance that takes advantage of the above. Soft sugar coating and powder coating, unlike hard sugar coating, have a soft texture, so it is possible to design products that make use of the original food of dried fruits. In any case, it is desirable to use vitamin C as it is in a dry form in order to increase the persistence of vitamin C.

Further, the number of coatings may be one or more. Furthermore, adjusting the amount of vitamin C compounded and the number of coatings so that the sour-tasting ingredient-dried dried fruit finally falls within the above-mentioned vitamin C content range is preferable in terms of moisture absorption prevention, appearance, and flavor. is there. For example, it is desirable in terms of workability, appearance, and flavor of the coating operation that the vitamin C content of the powder component is 10 to 60% by weight in the total weight of the powder component and the number of times of coating is 1 to 5 times.
It should be noted that which of the soft sugar coating and the powder coating is adopted may be appropriately adopted depending on the shape of the dried fruit, the moisture content, and the like. For example, if the flat shape or dried fruit has a high water content, powder coating is suitable for covering workability, prevention of sticking between dried fruits and stickiness, and when the dried fruit has a low water content. Soft sugar coating is suitable in terms of the persistence of vitamin C efficacy, flavor and appearance. In addition, combining an oil or fat coating with a powder coating or soft sugar coating is more preferable in terms of the persistence of vitamin C efficacy. Furthermore, the combination of soft sugar coating and fats and oils is most preferable in terms of the persistence of vitamin C efficacy.

The sour-component-dried dried fruit coated with the moisture absorption inhibitor of the present invention is produced, for example, as follows using the above raw materials.
First, dry fruits are prepared.
Next, vitamin C is mixed with an organic acid and auxiliary materials as necessary to prepare a powder component. Separately, a saccharide-containing aqueous solution in which powdered saccharide, water, and auxiliary materials as necessary are mixed, or an oil and fat having a melting point of 30 to 50 ° C. is prepared.
And first, the said dried fruit is thrown into a rotary pot, and it sets to ventilation temperature 15-35 degreeC, humidity 20-60%, and a wind speed 3-20 m / s, rotating a rotary pot at about 10-35 rpm. First, the powder component is applied, and then the sugar-containing solution or the oil / fat is sprinkled and rotated while being blown for 1 to 20 minutes. By repeating this series of coating operations one or more times, a sour-component-dried dried fruit coated with the moisture absorption inhibitor of the present invention is obtained. Soft sugar coating is obtained by alternately coating the powder component and the sugar-containing aqueous solution. Moreover, you may add the coating | coated operation by fats and oils of melting | fusing point 30-50 degreeC after coat | covering the said moisture absorption inhibitor.
The other, even only the powder component with one or more swing multiplied Keru Pas Uda coating, it is possible to obtain the sour components coated nut of the invention.

What is necessary is just to wrap with a packaging body suitably, when commercializing this acidity component covering dried fruit. Preferably, the material of the package is aluminum, aluminum vapor deposition, glass vapor deposition, or the like, which is a moisture-sealable material that can be sealed, and is suitable in terms of maintaining the flavor without binding after packaging. is there.

Hereinafter, the present invention will be specifically described based on examples.

<Examples 1-8, Comparative Example 1>
First, dried fruit cranberries were prepared. (Moisture content: 16% by weight, size: 15 mm x 15 mm x 15 mm)
Next, powder components, saccharide-containing aqueous solutions, and fats and oils having the compositions shown in Table 1 were prepared.
Next, 50 kg of cranberries were put into the rotary kettle, and the air temperature was set to 28 ° C. and the humidity was 45% or less while the rotary kettle was rotated at 25 rpm. After applying 0.75 kg of the powder component, 0.9 kg of a saccharide-containing aqueous solution or 0.3 kg of fats and oils was applied and rotated for 5 minutes while blowing at a wind speed of 3 to 20 m / s. The number of coatings of the powder component and the saccharide-containing aqueous solution or fat was performed as shown in Table 1. Then, it was taken out from the rotary kettle and allowed to stand for 24 hours at an atmospheric temperature of 26 ° C. and a humidity of 45% or less to obtain a sour ingredient-coated cranberry coated with a moisture absorption inhibitor.
In addition, moisture content is set at 105 ° C. with a ket moisture meter FD-240-2 (manufactured by Kett Co., Ltd.). The measured value was used.

<Examples 9 to 21, Comparative Example 2>
First, the following dried fruits were prepared. (Size: 10mm x 10mm x 12mm)
Examples 9 to 15: Mango (water content: 10% by weight)
Examples 16 to 18, 20 and Comparative Example 2: Pineapple (water content: 7% by weight)
Examples 19 and 21: Papaya (water content: 11% by weight)
Next, powder components, saccharide-containing aqueous solutions or fats and oils having the compositions shown in Tables 2 to 3 were prepared.
Thereafter, in the same manner as in Example 1 described above, sour-component-dried dried fruits coated with each moisture absorption inhibitor were obtained.
In addition, the fats and oils of Examples 20 and 21 were sprinkled with 0.25 kg of fats and oils once after the coating times shown in Table 3 were applied.

Workability at the time of coating operation of the above-mentioned Example product and Comparative Example product, about 30 g of each was housed and sealed in an aluminum vapor-deposited flat pouch and stored at 55 ° C. for 3 days, moisture absorption preventing property, binding property and vitamin C remaining property Was evaluated as follows. Moreover, sensory evaluation was carried out by 10 expert panelists on the appearance and flavor of the above-mentioned Example products and Comparative Example products immediately after production.
(Moisture absorption prevention)
The surface condition was observed visually and touched.
(Binding property)
It calculated with the weight ratio of the binder of the dried fruits which occupy per whole weight.
(Vitamin C persistence)
Taking the vitamin C content immediately after production as 100%, the residual rate of vitamin C content of the stored product was calculated. The vitamin C content was measured by the following method.
(Vitamin C content measurement method)
30 g of the sample was accurately weighed, 220 g of distilled water was added and stirred, and the supernatant of the sample that was allowed to stand for 1 minute was measured by the indophenol titration method.

As a result of evaluation, in the examples, good results were obtained in all evaluations. In particular, when vitamin C was contained, and fumaric acid, adipic acid and glutamic acid were used in combination, workability during coating operation, moisture absorption prevention, binding property, vitamin C persistence, appearance and flavor were good. In Examples 1, 2, 9 to 15, and 19 which are soft sugar coatings, the dried fruit food as the center was utilized as it was, and a coating layer was formed along the uneven shape of the dried fruit.
On the other hand, the comparative example 1 which does not contain vitamin C did not give sourness and was bad in flavor. Moreover, since the comparative example 2 was the sour addition only by the sour component (organic acid) which does not contain vitamin C, the workability | operativity at the time of coating | coating operation, moisture absorption prevention, binding property, and the external appearance were bad.

Claims (5)

The organic acid of the following (1) containing a sour components, a moisture prevention agent sour component used in drying fruit coating the sour components, in total acidity component coated nut weight, 0.5 wt Vitamin C moisture prevention agent for sour components coated nut, wherein% to 10 wt% or less. (1) One or more of fumaric acid, adipic acid, glutamic acid, citric acid, malic acid and tartaric acid Furthermore, the following (A) or (B) moisture prevention agent for sour components Nut coated according to claim 1 Symbol mounting, characterized in that it contains a.
(A) Carbohydrate (B) Oil with a melting point of 30-50 ° C Coating of sour components, moisture prevention agent for sour components Nut coated according to claim 1 or 2, wherein the performed by soft dragee or powder coating. The organic acid of the following (1) is contained as a sour component, and 0.5% by weight or more and 10% by weight or less of vitamin C in the total weight of the sour component-coated dried fruit is used for the dried fruit that covers the sour component. to hygroscopic prevent how sour components coated nut.
(1) One or more of fumaric acid, adipic acid, glutamic acid, citric acid, malic acid and tartaric acid Coating of sour components, moisture prevention how sour components Nut coated according to claim 4, wherein a performed by soft dragee or powder coating.