JP5296840B2 - Raw starch paste and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a raw starch paste at low cost, in which the component is hardly separated, and has appropriate viscosity until being applied to an adherend. <P>SOLUTION: The raw starch paste includes raw precipitation and raw gluten that are wheat starch, in addition, trehalose, and the method of manufacturing the raw starch paste includes: a raw precipitation addition step A of adding the raw precipitation containing 40-50 wt.% of moisture to become 6.0-15.0 wt.%; a gluten addition step B of adding the raw gluten containing 40-50 wt.% of moisture to become 3.4-8.5 wt.%; and a trehalose addition step C of adding the trehalose to become 0.2-0.4 wt.%. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a raw starch paste using wheat starch and a method for producing the same.

  The glue is bonded to an adherend such as paper by a chemical action and a mechanical action, and the glue itself is also solidified to form a strong film to bond the adherends together. For example, when the adherend is paper, the chemical action is a hydrogen bond between the hydroxyl group in cellulose, which is a component of the paper, and the hydroxyl group of the paste. On the other hand, in the mechanical action, the glue enters the inside of the paper and hardens, and the hardened glue serves as a so-called anchor to physically bond the paper and the glue.

  As an aspect of the glue, in addition to being able to exert a chemical and mechanical action with the above-described adherend, so as to be able to soak into the surface of the paper that is the adherend, or to fill the concave portion of the surface, Liquids having a certain degree of viscosity are widely used. As raw materials for the paste having such physical properties, starch, polyvinyl alcohol, polyvinylpyrrolidone and the like are known.

  The starch paste is a paste mainly composed of natural (plant) derived starch, and is cured and bonded through a process of evaporating moisture after being applied to the adherend. The starch paste is particularly often used for bonding paper because it is inexpensive, easy to use and highly safe.

  For example, Patent Documents 1 and 2 describe the use of starch paste as paste for cardboard. In Patent Document 1, for example, starch paste is used which is mainly made of wheat starch and is subjected to graft copolymerization treatment on the starch. In Patent Document 2, for example, starch paste obtained by reducing the viscosity of wheat starch by oxidation treatment or enzyme treatment is used.

Japanese Patent Publication No. 61-11982 Japanese Examined Patent Publication No. 61-13511

It is important to select the glue to be used appropriately depending on the type of adherend and the site to be coated.
For example, when adhering adherends such as paper with starch paste, adhering adherends having flat surfaces to each other and adhering materials having uneven surfaces on at least one of the surfaces. In the case of pasting, it is good to use different starch pastes with different viscosities.
That is, in the latter case (having an uneven surface on the surface of the adherend), it is easier for the starch paste to enter the unevenness on the surface of the adherend when using a low-viscosity starch paste. It can be done quickly. Therefore, the viscosity of starch paste is an important factor.

  After the starch paste has been produced for a while, the paste components and water may be separated, particularly at low temperatures in winter. In such a case, there is a possibility that the original adhesive strength of the starch paste cannot be obtained due to changes in the viscosity and adhesive properties of the starch paste. In order to avoid such a situation, it is necessary to mix the components separated by stirring the starch paste uniformly, and it takes time to manage the quality of the starch paste.

  In order to obtain a desired bonding state and adhesive strength using starch paste, the starch paste components and water contained in the paste are separated from the production of the starch paste to the application to the adherend. It is required to have an appropriate viscosity without being separated.

  Therefore, an object of the present invention is to provide a raw starch paste at a low cost, which is difficult to separate components and has an appropriate viscosity until it is applied to an adherend.

That is, in order to achieve the above object, the following inventions [1] to [4] are provided.
[1] A raw starch paste containing raw starch and ginger, which are wheat starch, and further containing trehalose.
[2] 2.4 to 7.5 wt% of the solid content of the ginger precipitate, 1.4 to 4.2 wt% of the solid content of the ginger, and 0.2 to 0.4 wt% of trehalose, Furthermore, the raw starch paste according to the above [1] containing 85 to 96% by weight of water.
[3] The raw starch paste according to the above [1] or [2], wherein the average particle size of the ginger is 25 to 40 μm and the average particle size of the ginger is 2 to 10 μm.
[4] A bioprecipitation adding step of adding a bioprecipitate containing 40 to 50% by weight of water so as to be 6.0 to 15.0% by weight, and a ginger containing 40 to 50% by weight of water 3.4 A method for producing a raw starch paste, comprising: a ginger addition step of adding to -8.5 wt% and a trehalose addition step of adding trehalose to be 0.2 to 0.4 wt%.

  Like the structure of said [1]-[3], the raw starch paste of this invention contains the raw sediment and the ginger which are raw starches of wheat as a raw material of the said raw starch paste. Ginger and ginger are raw starches extracted from wheat flour. That is, ginger and ginger can be obtained at low cost because they are not processed (dried (heated), oxidized, or enzymatically treated) like processed starch. In addition, raw sediment and ginger contain a certain amount of water, and since the processing is not performed, the high molecular structure of starch is maintained. Is excellent in thickening properties.

  Furthermore, the raw starch of the present application contains trehalose, which is a kind of disaccharide. As a result of diligent research, the present inventors have found that the raw sediment solid content is 2.4 to 7.5% by weight, the ginger solid content is 1.4 to 4.2% by weight, like the raw starch paste of the present application, If blended to contain 0.2-0.4% by weight of trehalose and 85-96% by weight of water, the original properties of the paste when raw starch paste is produced will be maintained over a long period of time. I found out that I can do it.

  In Example 1, which will be described later, an upper limit (7.5% by weight) for ginger, an upper limit (4.2% by weight) for ginger and a lower limit (85% by weight) for water are defined. Stipulates the lower limit (2.4 wt%) of ginger, the lower limit (1.4 wt%) of ginger and the upper limit of water (96 wt%).

  With the raw starch paste of the present invention, it becomes possible to prevent separation of components and water from being separated after production, having water retention for a long period after production, and having an appropriate viscosity. It becomes a paste that can be maintained. Thus, since the raw starch paste of this application tends to maintain the quality at the time of manufacturing raw starch paste over a long period of time, quality management becomes easy.

  Moreover, in the raw starch paste of this invention, the average particle diameter of the said raw sediment is 25-40 micrometers, the average particle diameter of the said ginger is 2-10 micrometers, and the component from which average particle size distribution differs is mixed. The viscosity of raw starch paste is increased by adding raw precipitate with a large average particle size. On the other hand, a raw starch paste with fine texture can be obtained by adding ginger having a small average particle diameter. Adhesive strength can be improved by using a fine raw starch paste.

  Furthermore, according to the method for producing raw starch paste of [4] above, the raw starch paste of the present invention can be produced by mixing water-containing raw sediment and ginger at a predetermined ratio. In particular, the raw starch, ginger, and trehalose are added in a ratio specific to the present application in this method, so that the raw starch paste that can maintain properties such as viscosity when the raw starch paste is produced over a long period of time. Can be manufactured.

It is a flowchart which shows the outline | summary of the manufacturing method of the raw starch paste of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The raw starch paste of the present invention contains raw starch and ginger which are wheat starches, and further contains trehalose.
Ginger and ginger are starches extracted from wheat flour. These can be produced by known methods. For example, it can be produced by adding a small amount of salt and water to wheat flour, kneading it well, leaving it in a bowl shape, allowing it to stand for a predetermined time, and then washing it in water. During the manufacturing process, ginger and ginger are separated. The one that settles in water is ginger and the one that does not settle is ginger. The ginger and ginger contain about 40 to 50% by weight of water. The grit used in the present invention has an average particle size of 25 to 40 μm, and the ginger has a mean particle size of 2 to 10 μm. Further, the raw sediment and ginger used in the present invention are not subjected to processing treatments such as drying (heating), oxidation, and enzyme treatment as in the case of processed starch, so that the high molecular structure of starch is maintained.

  The raw starch paste of the present invention contains 2.4 to 7.5% by weight of ginger solids, 1.4 to 4.2% by weight of ginger solids, and 0.2 to 0.4% by weight of trehalose. Furthermore, it contains 85 to 96% by weight of water. The “solid content” refers to a polymer contained in ginger and ginger, and does not include moisture contained in ginger and ginger.

By blending ginger, ginger and trehalose in the above ratio to produce the raw starch paste of the present invention, it becomes possible to prevent the components from being separated after production or water from being separated, after production, It becomes a raw starch paste that has a water retention ability over a long period of time and can maintain an appropriate viscosity.
In the present invention, processed starch such as dried starch is not used, and only 0.2 to 0.4% by weight of trehalose may be added. Therefore, the raw starch paste of the present invention can be provided at low cost.

It becomes a raw starch paste with a high viscosity by containing a specific amount of ginger or ginger like the raw starch paste of the present invention. That is, since it becomes a highly viscous paste, it is convenient for pasting a specific adherend. For example, when manufacturing large-capacity paper bags such as rice bags, fertilizer bags, cement bags, etc., it is used when pasting the back (body part) of the bag and pasting the bottom The type of glue to be changed may be changed.
A high-viscosity paste such as the raw starch paste of the present application is suitable for bonding the back surfaces of a pair of bags, for example. If there are irregularities (folds or the like) in the paste application area, it is preferable to apply the glue quickly over the entire surface of the irregularities, and thus a glue with low viscosity is often used. On the other hand, in the case of the back surface, since the paste application area is usually flat, it is preferable to use a high-viscosity glue that does not cause dripping of the glue.

  The raw starch paste of the present invention contains bioprecipitation adding step A in which bioprecipitation containing 40 to 50% by weight of water is added to 6.0 to 15.0% by weight and 40 to 50% by weight of water. Performing ginger addition step B for adding 3.4% to 8.5% by weight of ginger and trehalose addition step C for adding trehalose to 0.2 to 0.4% by weight. Can be manufactured (FIG. 1).

  Each of biosediment, ginger and trehalose is put into a stirring vessel, and stirring is performed for a predetermined time by a stirring means capable of controlling temperature, stirring speed and the like (stirring step). The order of adding each component is not limited. Stirring may be performed while adding water, or in a state where each component is added after a predetermined amount of water is previously charged into the container. Stirring is performed while maintaining a desired temperature (for example, 85 to 90 ° C.), and after a predetermined time has elapsed, for example, the mixture is cooled to room temperature to produce raw starch paste.

  You may add another component to the raw starch paste of this invention as needed. Examples of other components include starches other than wheat and preservatives. The other components are added to, for example, about 1.0 to 2.5% by weight.

  Examples of the present invention will be described.

[Example 1]
4000 kg of the raw starch paste of the present invention was produced.
Add 600 kg of sausage (Kusano Foods Co., Ltd.) containing 44% by weight of water, 340 kg of ginger (Kusano Foods Co., Ltd.) containing 44% by weight of water, and 12 kg of trehalose (made by Hayashibara Shoji Co., Ltd.) Water was added so that the volume was 3000 L (final weight 4000 kg). The mixture was stirred at 90 ° C. for 3 hours while adding each component, and then cooled to room temperature.

  The produced raw starch paste was used as an industrial starch paste for adhering adherends such as paper and cloth such as cardboard and paper bags. In addition, the raw starch paste of this example has a water retention ability over a long period of time and maintains an appropriate viscosity without separation of components or water over 3 months after production. did it.

  In addition, raw sediment and ginger are refine | purified in the state containing about 40 to 50 weight% of water | moisture content in these manufacturing steps. That is, in this example, those having a water content of 44% by weight were used, but if the water content was between 40 and 50% by weight, the same effect was obtained (results not shown).

For example, in the bioprecipitation of the present example, when the water content is 40% by weight, the solid content is 6.0% by weight (15 × 0.4), and when the water content is 50% by weight, the solid content is 7.5%. % By weight (15 × 0.5) (Table 2).
Further, in the ginger of this example, when the water content is 40% by weight, the solid content: 3.40% by weight (8.5 × 0.4), and when the water content is 50% by weight, the solid content: 4. 25% by weight (8.5 × 0.5) (Table 2).

In this case, the amount of water contained in 4000 kg of raw starch paste is the total amount of water added during stirring and water contained in raw sediment and ginger. That is, water added at the time of stirring: 76.2% by weight (3048/4000), and water contained in ginger and ginger when the water content is 40% by weight: 14.1% by weight (9.0 + 5.1) Value obtained by adding: 90.3% by weight.
Similarly, when the water content of ginger and ginger is 50% by weight, the water content of the raw starch paste is 87.9% by weight (76.2 + 7.5 + 4.2).

Therefore, the raw starch paste of this example has a solid content of raw sediment of 6.0 to 7.5% by weight, a solid content of ginger of 3.4 to 4.2% by weight, a trehalose of 0.3% by weight, and a water content of 87%. It was recognized that the same effect could be obtained if it was in the range of .9 to 90.3% by weight.
Furthermore, in view of the case of containing about 2.5% by weight of other components, the water content of the raw starch paste of this example only needs to be reduced by the amount of the other components, so that 85.4 (about 85). To 87.8% by weight.

[Example 2]
10,000 kg of the raw starch paste of the present invention was produced.
600 kg of raw sediment containing 44% by weight of water, 340 kg of ginger containing 44% by weight of water, and 30 kg of trehalose were added and water was added. It stirred at room temperature for 3 hours, adding each component.

  The produced raw starch paste was used as industrial starch paste (for example, paste (body paste) for pasting the back (body portion) of a paper cement bag having a capacity of 20 L). In addition, the raw starch paste of this example also has a water retention ability and maintains an appropriate viscosity for a long period of time without separation of components or separation of water over 3 months after production. did it.

In the bioprecipitation of this example, when the water content is 40% by weight, the solid content: 2.4% by weight (6 × 0.4), and when the water content is 50% by weight, the solid content: 3.0 % By weight (6 × 0.5) (Table 4).
Further, in the ginger of this example, when the water content is 40% by weight, the solid content: 1.4% by weight (3.4 × 0.4), and when the water content is 50% by weight, the solid content: 1. 7% by weight (3.4 × 0.5) (Table 4).

In this case, the amount of water contained in 10000 kg of raw starch paste is included in the water added at the time of stirring: 90.3% by weight (9030/10000), and in the raw sediment and ginger when the water content is 40% by weight. Water: 5.6% by weight (3.6 + 2.0) plus 95.9 (about 96%)%.
Similarly, when the water content of ginger and ginger is 50% by weight, the water content of the raw starch paste is 95.0% by weight (90.3 + 3.0 + 1.7).

  Therefore, the raw starch paste of this example has a solid content of 2.4 to 3.0% by weight, a solid content of ginger 1.4 to 1.7% by weight, a trehalose 0.3% by weight, and a water content of 95. It was recognized that the same effect could be obtained if it was in the range of -96% by weight.

[Another embodiment 1]
In Examples 1 and 2, trehalose was added to 0.3 wt%, but may be added to 0.2 to 0.4 wt%. Even in this case, a raw starch paste having the same effect as in Examples 1 and 2 could be produced (results not shown).

  INDUSTRIAL APPLICATION This invention can be utilized for the manufacturing method of raw starch paste and the said raw starch paste.

A Ginkgo addition process B Ginger addition process C Trehalose addition process

Claims (4)

  Raw starch paste containing raw starch and ginger, which are wheat starch, and trehalose.   It contains 2.4 to 7.5 wt% of the solid content of the ginger precipitate, 1.4 to 4.2 wt% of the solid content of the ginger, 0.2 to 0.4 wt% of trehalose, and water. The raw starch paste according to claim 1, containing 85 to 96% by weight.   The raw starch paste according to claim 1 or 2, wherein the average particle size of the raw sediment is 25 to 40 µm, and the average particle size of the ginger is 2 to 10 µm. A bioprecipitation adding step of adding bioprecipitation containing 40 to 50% by weight of water so as to be 6.0 to 15.0% by weight;
Ginger addition step of adding ginger containing 40 to 50% by weight of water so as to be 3.4 to 8.5% by weight;
And a trehalose addition step of adding trehalose so as to be 0.2 to 0.4% by weight.

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