JPH06277160A - Dried product of white-colored konjak sponge and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a dried product of a white-colored konjak sponge having a small coefficient of contraction and degree of deformation and at least 80 of brightness and a method for manufacturing the same. CONSTITUTION:A konjak sponge is placed under pressure reduction and water content contained in the sponge is gasified to take heat away from the sponge, freeze and dry the sponge for providing a dried product of a white-colored konjak sponge having at least 80 of brightness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white konjak sponge dried product having high commercial value and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, konjak sponges have been obtained by freezing konjak containing glucomannan, which is a natural polysaccharide, as its main component. It is often used for face washing and washing of infants.

Since the above-mentioned konjak sponge is a natural polysaccharide, if it is left in the environment while containing water,
As mold and bacteria propagate and deteriorate due to it, they are transported and sold in a dry state. However, when hot air drying, which is a general drying method, is applied, there is a problem that the dried product shrinks and deforms, which lowers the product value. As a countermeasure, there is a method of performing freeze-drying, but if preliminary freezing is insufficient or the surface is thawed during drying,
Partially whitened, causing another problem that reduces the product value.

[0004]

The problem to be solved is that the dried product of konjak sponge produced by utilizing the above-mentioned conventional freeze-drying becomes partly white and its product value is low.

[0005]

The first invention is a white konjak sponge dried product having a lightness of 80 or more without adding a coloring matter such as a pigment or a dye or a bleaching agent.

A second aspect of the present invention is a method for producing a dried white konjak sponge product, which comprises placing the konjak sponge under reduced pressure and vaporizing the water contained therein to remove heat, freeze, and dry.

[0007]

EXAMPLES First, the method for producing konjak sponge will be described. First, 50 grams of konjak powder is dissolved in 2.4 liters of water. Separately, 72 grams of carrageenan is dissolved in 2.4 liters of water, cooled to gel, and the resulting gel is cut into cubes of a certain size to form carrageenan gel cubes. Next, a carrageenan gel cube and lime water are added to the konjac flour solution, and the mixture is poured into a mold to be molded and then gelled. Further, the carrageenan gel cube in the obtained gel molded product is dissolved and removed in hot water.
After removing the carrageenan gel cubes, the konjak sponge is obtained by thawing and dehydrating after freezing.

This konjak sponge was placed in a dry chamber having a shelf temperature of 30 ° C. without pre-freezing,
By reducing the pressure and evaporating the water contained in it,
When it removes heat and freezes, it instantly turns white. Further, if the pressure reduction is continued as it is, a dried product of konjac sponge is obtained.

[0009]

The operation is as follows. The dried product of the konjak sponge has a lightness (S
Lens Mφ using M color computer SM-4 type
The value measured at 30) was 91.7, the shrinkage ratio was 6% based on the dimension before drying, and no deformation was observed. For comparison, the konjac sponge was pre-frozen at -20 ° C for 30 minutes, placed in a dry chamber with the shelf heater turned off, immediately depressurized, and 1 hour later, the shelf heater was turned on (temperature Was set to 30 ° C.) and the pressure was reduced, a lightness of 70.4, a shrinkage of 6% and no deformation was observed, but a dried product with a partially whitened surface was obtained.

[0010]

Since the present invention is constructed as described above,
The resulting dried product is uniformly whitened and has a brightness of 8
It was 0 degrees or more, and the product value was significantly improved. In the present invention, the preliminary freezing step is unnecessary, and when the dried product is immersed in water, it returns to the state before drying and no change in physical properties was observed.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akira Tanaya 2-2-8, Misono-cho, Nishi-ku, Hiroshima City Nishikawa Gum Kogyo Co., Ltd. (72) Toshio Shimizu 3622 Kihara-cho, Mihara-shi, Hiroshima Shimizu Chemical Co., Ltd. Inside the formula company (72) Inventor Hideki Shimizu 3622 Kihara-cho, Mihara City, Hiroshima Prefecture Shimizu Chemical Co. Inside the formula company

Claims (2)

[Claims] 1. A white konjak sponge dried product having a brightness of 80 or more without adding a coloring matter such as a pigment or a dye and a bleaching agent. 2. The konjak sponge is placed under a reduced pressure and the water contained therein is vaporized to remove heat,
A method for producing a white konjak sponge dried product, which comprises freezing and drying.