JP2005120328A - Devil's tongue jelly-formed material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a devil's tongue jelly-formed material collapsing its shape and falling into pieces by immersing it with water or pouring water on it and also capable of controlling its collapsing time. <P>SOLUTION: This devil's tongue jelly-formed material is obtained by putting a sol-gel state devil's tongue jelly adjusted in a pH range where its insolubilization is incomplete in a desired mold and drying. By immersing the devil's tongue jelly-formed material with water or pouring water on it, its shape is collapsed into pieces. Also there is a correlation between the pH of the sol-gel state devil's tongue jelly and the collapsing time of the devil's tongue jelly-formed material. From the above results, by only controlling the pH of the sol-gel state devil's tongue jelly, it is possible to control the shape-collapsing time of the devil's tongue jelly between several seconds to several hours. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a konjac-formation product that can be used as a molded product of a biodegradable polymer. When immersed in water or sprayed with water, the shape can be collapsed in a short time of several seconds to several hours. The present invention relates to a material that can control the time to be performed.

  Today, a wide range of products are composed of chemically synthesized polymers such as plastics and vinyl materials. These various synthetic polymers are resistant to chemical and microbial degradation, and products that have been drowned into the soil or water will not be decomposed and will remain semi-permanently. Is being contaminated extensively. Some incinerators generate toxic gases such as dioxins and others generate high heat and damage the incinerator. To overcome this situation, biodegradable polymers that are decomposed in the environment Has been researched, developed and commercialized.

  As a biodegradable polymer, konjac, which is mainly composed of konjac mannan, which is a kind of glucomannan, can produce a polymer that is insoluble in water when treated with alkali, and is thermally stable. Has a characteristic that it decomposes and disappears naturally in a few months, so it is considered promising among biodegradable polymers, and various application examples have been reported as substitutes for synthetic polymer products. .

  However, biodegradable polymers based on konjac can be decomposed and removed even if the shape only needs to be maintained for a few minutes to several hours, such as artificial food and outdoor tableware golf tees and marks. Since it takes several months to disappear, it is collected and incinerated or landfilled together with other garbage from the viewpoint of beauty and landscape protection. This does not fully demonstrate the characteristics of biodegradable polymers that can be decomposed and lost in harmony with the environment.

In this way, a biodegradable polymer that does not affect the environment, breaks apart without any shape remaining after the purpose of use is achieved, and can be controlled freely according to the purpose of use, is still in the world. It does not exist and is considered to have high industrial utility value.
Japanese Unexamined Patent Publication No. 07-304881 JP 2001-342354 A JP 2002-275310 A Makoto Oki's “Science of Konyaku” published by Keisuisha

  It is an object of the present invention to provide a konjac formation product that can be disintegrated in shape when immersed in water or subjected to water, and the disintegration time can be controlled.

    The inventor of the present application creates a konjac formed product obtained by putting a sol-gel konjac adjusted to a pH region incompletely insolubilized into a desired mold and drying it, and immersing the konjac formed product in water or applying water. And found that the shape collapsed apart. It was also found and demonstrated that there is a correlation between the pH of the sol-gel konjac within the above range and the shape collapse time of the konjac formed product. From these results, in order to achieve the above-mentioned object, the present invention can control the shape collapse time of the konjac-formed product within a few seconds to several hours simply by adjusting the pH of the sol-gel konjac. It is a thing.

  The konjac formed product of the present invention can be applied to a molded product that needs to keep its shape only for a few seconds to several hours, and the shape may quickly collapse when it is immersed in water after being used. There is an advantage that the disintegration time can be controlled within a few seconds to several hours depending on the purpose.

  A preparation example and an adaptation example when the konjac formed product of the present invention is used as a bait theft prevention sheet for fishing will be described below.

(Example of creation)

As an example of the present invention, a method for producing a konjac formed product for the purpose of preventing bait for fishing will be described below.
(1) Dissolve konjac powder in water and optimally make 0.4% to 0.7% konjac sol.
(2) 0.5 wt% to 1.5 wt% of konjac sol prepared from a pulverized product of a fibrous material such as pulp is mixed.
(3) As a weight submerged in water, 10 wt% to 20 wt% of konjac sol is mixed with a material obtained by pulverizing minerals such as sand.
(4) An alkaline substance such as calcium hydroxide is added in an amount of 0.018 wt% to 0.025 wt% of the whole.
(5) Stir well so that all of (1) to (4) are uniformly mixed.

  Next, the sufficiently stirred sol-gel konjac is poured into a mold having a diameter of 10 cm and a thickness of 5 mm, and dried so as not to be deformed. The drying at this time may be either room temperature drying or heat drying.

  FIG. 1 shows the relationship between the pH of the konjac formed product and the shape collapse time. From this figure, it can be seen that the shape collapses slowly as the pH increases, and conversely, the shape collapses as soon as the pH decreases, and the shape collapse time of the konjac formation can be controlled simply by adjusting the pH. I understand.

  The reason why the shape collapse of the konjac formed product of the present invention can be controlled will be described below. Konjac mannan is composed of a complex polysaccharide in which a large number of D-glucose and D-mannose are linked by β-1.4 bonds in a molar ratio of 2: 3 to 1: 1.6. is there. Further, there is a branch by β-1.3 bond from the main chain mannose group at a ratio of 1 to 32 to 80 sugar residues, and an acetyl group is ester-bonded at a ratio of 19 per 19 sugar residues. To do.

  The gelation mechanism of konjac mannan is triggered by deacetylation with an alkaline additive, and konjac mannan, which has lost its acetyl group by alkali treatment, is partially crystallized by intermolecular hydrogen bonding, forming a network structure with this as a node. It becomes insoluble.

  At this time, the deacetylation can be limited by adjusting the amount of the alkaline additive, and the formation of a network structure by the subsequent hydrogen bonding can be adjusted, so that the strength of the konjac gel can be controlled. Thus, the sol-gel konjac produced by adjusting the alkaline addition amount becomes a sol-gel konjac having a different degree of gelation depending on the alkaline addition amount. Therefore, a sol-gel konjac with a low degree of gelation is easy to dissolve in water, and the time for the shape to collapse is shortened. become. (See Figure 1)

  Based on the composition of the sol-gel konjac, by adding an arbitrary amount of fibrous substance as a support to this composition, the forming process can be facilitated and the strength can be arbitrarily adjusted.

(Adaptation example)

  FIG. 2 shows an application example in which the konjac product of the present invention is used as a sheet 2 for preventing feeding. The fishhook 3 is passed through the center position of the bait theft prevention sheet 2 and brought to the vicinity of the fishing line 4 above the fishhook 3, and the fishing bait 1 is attached to the fishhook 3.

  After attaching fishing bait 1, cover fishing bait 1 with light hand so as to wrap fishing bait 1 with bait-preventing sheet 2 and quickly throw it into the water. To do.

  While the fishing bait 1 covered with the bait-preventing sheet 2 is sinking in the water, the bait-preventing sheet 2 is mixed with sand as a weight, so that there is no buoyancy. 1 can be carried to the target water depth.

  The fishing bait 1 wrapped in the bait-preventing sheet 2 was observed from the surface while the fishing bait 1 was sinking into the water. I didn't come to 1 at all. Also, since the bait-preventing sheet 2 collapses apart after the shape collapse time has elapsed (after reaching the target water depth), the fishing bait 1 appears intact in front of the fish to be fished. I was able to.

  In this way, when the bait-preventing sheet 2 is used as shown in FIG. 2, the bait stealing small fish can steal the bait while sinking to the water depth for fishing the target fish. You can submerge the bait in an intact state until the desired depth. Further, the sheet 2 for preventing food theft by the konjac formed product of the present invention can control the shape collapse time after being immersed in water, so the time that the food has to reach the target water depth After the lapse of time, the shape collapsed, so it became possible to efficiently guide the bait before the eyes of the fish to be fished with the bait intact.

  Currently, it can be widely applied and developed to biodegradable polymer simulated baits, outdoor tableware, golf tees and marks, etc., which are partially applied. In addition, unlike conventional biodegradable polymers, they do not decompose or disappear after several months of use, but after achieving various purposes of use, they can be quickly shaped by simply immersing them in water or applying water. Because it can be collapsed, it can also be applied to applications that must be dealt with, such as disposal, aesthetics, and landscape protection.

It is the graph which showed the correlation with pH and shape collapse time of the konjac formation product of this invention. (Example 1) It is the schematic when using the konjac formation material of this invention as a sheet | seat for bait anti-theft. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fishing bait 2 The sheet | seat for bait | stealing prevention by the konjac formation of this invention 3 Fishhook 4 Fishing line

Claims (4)

  At least water, konjac mannan and an alkaline additive are mixed by stirring, and a sol-gel konjac adjusted to a pH in the range of incomplete insolubilization is placed in a desired mold and dried. A konjac product, wherein the shape of the konjac product collapses when immersed in water or water.   The time at which the shape collapses can be controlled within a few seconds to several hours by arbitrarily setting the pH of the sol-gel konjac according to claim 1 within a range where insolubilization is incomplete. Item 10. A konjac formation product according to Item 1.   It is composed of sol-gel konjac prepared by mixing water, 0.2% to 3.0% konjac mannan, 1.5 wt% or less fibrous material, and alkaline additive, and adjusting the pH within a range of pH 8 to less than 12. The konjac formation product according to claim 1 or 2,   The konjac formation product according to claim 1, 2 or 3, wherein 10 to 20 wt% of pulverized mineral is mixed.

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