JPH044016B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a substrate for powdering liquid substances. It is often convenient to pulverize liquid substances such as oils and fats and organic solvents depending on their use, and attempts have been made to pulverize liquid substances in various fields including food, medicine, and agricultural chemicals. ing. Generally, this powdering is carried out by adsorbing the liquid substance onto a powdering base material, and modified starch, natural gum, etc. are used as the base material.
However, these conventional base materials have problems such as requiring complicated operations to adsorb liquid substances, insufficient adsorption amount of liquid substances, and poor water swelling properties of adsorbed products. It is difficult to find a material that is fully satisfactory as a base material for powdering liquid substances. While the present inventors conducted various studies on powdering liquid substances, they unexpectedly found that a powder obtained by drying an aqueous dispersion of starch or its derivatives and a certain type of polymer substance using a drum dryer was found to be a liquid substance. It was discovered that it is suitable as a base material for powdering substances, and the present invention was completed. That is, the present invention provides an aqueous dispersion of starch or a derivative thereof and one or more polymeric substances selected from the group consisting of water-soluble or water-dispersible proteins and water-soluble synthetic polymers. ~20
The present invention provides a base material for powdering a liquid substance consisting of a drum dryer dry powder having a water solubility of ml/g. The base material of the present invention is a powder that is bulky, has a large specific volume, shows high liquid substance adsorption ability, and has high strength. , so-called liquid leakage hardly occurs during the adsorption process, subsequent holding, and transportation. Moreover, the resulting powdered liquid material product also has the advantage of exhibiting excellent water swelling properties. Thus, the starch or its derivatives used in the present invention include natural starches selected from potato starch, corn starch, waxy corn starch, sweet potato starch, wheat starch, rice starch, tapioca starch, sago starch, and amylose and amylopectin fractions. , etherified starch, esterified starch, oxidized starch, acid-treated starch, grafted starch, and the like. As the polymer substance, water-soluble or water-dispersible proteins such as gelatin, sodium caseinate, water-soluble egg white, whole egg, glue, and collagen, and water-soluble synthetic polymers such as polyvinyl alcohol, sodium polyacrylate, and polyethylene oxide are used. It will be done. These polymeric substances may be used alone or in combination of two or more, and the amount used can be selected as appropriate depending on the performance of the desired powdered product.
0.1-10% based on the starch or its derivative used
(% by weight, the same applies hereinafter) is preferable. In particular,
It is preferable to use water-soluble or water-dispersible proteins as the polymeric substance. The base material of the present invention can be produced by preparing an aqueous dispersion containing starch or a derivative thereof and a polymeric substance, and drying and pulverizing the dispersion using a double or single drum dryer according to a conventional method. The concentration of starch or its derivative in the aqueous dispersion can be appropriately selected depending on the actual operating conditions of the drum dryer, and is usually preferably 30 to 60%. Further, there are no particular restrictions on the operating conditions of the drum dryer, and normal temperatures, pressures, rotational speeds, and roll slit widths can be used, and are adjusted as appropriate depending on the raw materials used, the performance of the powdered product, and the intended use. In addition, the aqueous dispersion contains glycerin fatty acid ester, sucrose fatty acid ester, propylene glycol fatty acid ester, sorbitan fatty acid ester,
Surfactants such as fatty acid salts, alkyl sulfate esters, alkylbenzene sulfonates, alkyl amine salts, quaternary ammonium salts, alkyl betaines, and lecithin are added to starch or its derivatives at a rate of 0.01
It may be added in an amount of up to 10%, thereby further improving the strength and water swelling properties of the resulting powder. The particle size of the obtained dry powder is adjusted using a sieve in a conventional manner. Usually, a particle size of about 20 to 100 mesh is preferred. The thus obtained base material for powdering a liquid substance of the present invention usually has a specific volume of 8.2 to 20 ml/g, and is suitable for use in liquid substances that are required to be powdered in various industrial fields including food, medicine, and agricultural chemicals. It can be suitably used for powdering substances. Such liquid substances include, for example,
rapeseed oil, sesame oil, soybean oil, peanut oil, cottonseed oil,
Oils and fats such as corn oil, safflower oil, coconut oil, palm oil, castor oil, lard, head, fish oil, whale oil, petroleum, vaseline, butter, margarine, hydrogenated oil, shell toning, cod liver oil, perfume oil, spice oil, methanol, Examples include alcohols such as ethanol, isopropanol, and glycerin, solvents such as acetone, ethylene glycol, propylene glycol, xylene, and toluene, and various pesticide emulsions. It can be turned into powder simply by mixing it with other materials and adsorbing it. Next, the present invention will be explained in more detail with reference to Examples. In addition, in the examples, all "parts" mean parts by weight. Example 1 Hydroxypropyl starch (degree of substitution 0.05)
Disperse 100 parts in water and adjust the Baume degree to 15 degrees,
To this, add an aqueous gelatin solution prepared by dissolving 1 part of gelatin in 4 parts of water, and 0.1 part of monoglycerin ester.
Mixed evenly. This dispersion was gelatinized and dried into powder using a double drum dryer in the same manner as in Example 1.
The mixture was passed through a 24-mesh sieve to obtain a base material for powdering a liquid substance with a specific volume of 9.2 ml/g. Example 2 Sodium starch phosphate (degree of substitution 0.05)
Disperse 100 parts in water and adjust the Baume degree to 15 degrees,
An aqueous egg white solution prepared by dissolving 1 part of dried egg white in 7 parts of water was added to this and mixed uniformly. As in Example 1, this dispersion was gelatinized using a double drum dryer, dried and powdered, passed through a 24-mesh sieve, and the specific volume was 9.5.
A base material for powdering a liquid substance of ml/g was obtained. Example 3 100 parts of waxy corn starch was dispersed in water and adjusted to a Baume degree of 18 degrees, and an aqueous egg white solution prepared by dissolving 1 part of dried egg white in 7 parts of water was added thereto and mixed uniformly. This dispersion was gelatinized and dried into a powder using a double drum dryer in the same manner as in Example 1, and passed through a 24-mesh sieve to obtain a base material for powdering a liquid substance with a specific volume of 11.2 ml/g. Control Example 1 100 parts of waxy corn starch was dispersed in water and adjusted to a Baume degree of 18 degrees. This dispersion was prepared in Example 1.
Similarly, gelatinize with a double drum dryer, dry powder, pass through a 24-mesh sieve, and reduce the specific volume to 4.2.
A base material for powdering a liquid substance of ml/g was obtained. The performance of the substrates obtained in these Examples and Control Examples was tested as follows. Test-1 100g of each base material sample was placed in a small blender (rotation speed
60 rpm) for 10 minutes, the specific volume and oil absorption before and after mixing were measured, and the fracture resistance strength was tested. The oil absorption was measured in accordance with the method of JIS K5101-196419 as follows. 3 g of the sample was placed on a glass plate, and boiled linseed oil was dripped into the center of the sample in small amounts from a biuret, waiting for the oil to be naturally absorbed, and the operation of dropping again was repeated until the entire sample became sticky. Oil absorption amount G was calculated from the amount of boiled linseed oil used using the following formula. G (%) = H/S x 100 H: Boiled flaxseed oil amount (ml) S: Sample weight (g) The results are shown in Table 1. In addition, in order to compare the reduction in specific volume and oil absorption due to mixing and destruction of each sample, the residual ratio calculated according to the following formula is also shown. Survival rate (%) = Value after mixing / Value before mixing × 10
0

[Table] As shown in Table 1, the base material of the present invention has a much larger specific volume and oil absorption than the control example, and has high fracture resistance. In addition, when similar tests were conducted using the starch and starch derivative itself used in these Examples, both before and after mixing,
The specific volume was 2.2 to 2.4 ml/g and the oil absorption was 60 to 64%. Test-2 15g of rapeseed oil was adsorbed on 20g of each base material,
It was spread over an area of 100 cm ² on a 200 cm ² paper (thickness 3 mm) that had been weighed in advance, and a load of 20 kg was applied per 100 cm ² and left for one day. The amount of rapeseed oil adsorbed on the paper was weighed, and the residual rate of rapeseed oil adsorbed on the substrate under load compression was calculated using the following formula. Residual rate (%) = 15 - rapeseed oil adsorbed on paper (g) /
15×100 The results are shown in Table 2.

[Table] It is clear from the results in Table 2 that the base material of the present invention has excellent strength and oil absorption ability. In addition, when the starch and starch derivative itself used in these Examples were similarly tested, the residual rate was about 28% in both cases.

Claims (1)

[Scope of Claims] 1 Potato starch, corn starch, waxy corn starch, sweet potato starch, wheat starch, rice starch, tapioca starch, sago starch, amylose, amylopectin fraction, etherified starch, esterified starch, oxidized starch, Starch or a derivative thereof selected from the group consisting of acid-treated starch and grafted starch; and one or more polymeric substances selected from the group consisting of water-soluble or water-dispersible proteins and water-soluble synthetic polymers. of aqueous dispersion, 8.2 to 20 ml/
A base material for powdering a liquid substance, characterized in that it consists of a drum dryer-dried powder having a specific volume of g. 2. The base material of item 1 above, wherein the polymeric substance is a water-soluble or water-dispersible protein. 3. The base material according to item 1 or 2 above, which contains 0.1 to 10% by weight of the polymeric substance based on starch or its derivative.