JPH05321174A - Jute string for tree and its treatment - Google Patents

Abstract

PURPOSE:To obtain the subject jute string receiving an action of a cellulose- decomposing enzyme or a bacterium so as to be reduced in strength within a prescribed service period, free from requirement for an operation of removal of the string and useful for post-planting cure, rooting, removal of the snow, etc., by applying the enzyme or a culture solution for the bacterium to the jute string and drying it. CONSTITUTION:A string made of jute as the raw material is reeled, immersed in a treatment containing a cellulose-decomposing enzyme (e.g. cellulase) or powdery milk, starch, etc., for a culture medium, subsequently squeezed (55wt.% squeeze ratio) by a centrifugal separator and naturally dried, thus obtaining the objective jute string for trees, treated with the cellulose-decomposing enzyme or the culture solution for a bacterium. In addition, if the resultant jute string 1 is stretched between outdoor trees 2 or between a tree 3 and a pile 4 for post-planting cure, the string absorbs moisture from the ambient air or from the rain, the smog, etc. After allowing the string to stand for a prescribed period, cellulose is decomposed by an action of the cellulose-decomposing enzyme or the cellulose-decomposing bacterium derived from the surrounding environment and adhering to the culture medium applied to the outside layer of the jute and the strength of the jute string is reduced. Thereby, the string is naturally broken and a manual operation for removal is not required.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Burlap is widely used as a string for raising snow on trees because it is strong and advantageous in terms of price. Normally, it is used for about 6 months from spring to autumn, but if used for a certain period of time, it is necessary to remove this jute string.
However, jute fibers are less likely to rot than other plant fibers such as straw. For this reason, cutting and removing work is currently carried out manually, but recently this work tends to be delayed due to lack of manpower, and if the burlap is not broken, damage such as biting into the trunk of the tree and causing damage tends to occur. Is. The present invention relates to a string and a method for treating the string that reduces the strength of the string and is naturally broken by the action of enzymes and bacteria during a certain period of use of the string used for snow raising of trees. The jute string treated in 1. does not require manual removal work.

[0002]

2. Description of the Related Art The jute string which has been conventionally used for tree survival, curing or snow-raising does not show a significant decrease in strength after about 6 months of use. Therefore, the string tied to the trunk cuts into the trunk as the tree grows, and also becomes an obstacle when weeding in the summer. The tree that the string digs into the trunk becomes a bad timber and is a fatal blow in vegetation and afforestation. Therefore, it is necessary to cut and remove the jute string after using for a certain period of time, and a lot of labor has been spent on this. As described above, the conventional jute string has various problems, and the present inventor has applied for Japanese Patent Application Laid-Open No. 2-249886 in order to solve the problems. However, this method uses a metal salt, and when this compound is decomposed, an acid component is generated, and if it remains and accumulates, there is a concern that the environment may be polluted. In addition, its usage requires a work of partially injecting a deterioration promoting agent into a cylindrical burlap string just before use,
There is also a problem that it takes time to do this at the site of use.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been obtained as a result of earnest research for solving the above-mentioned problems, and does not require troublesome preparation work before use, resulting in a decrease in strength after use. A further object of the present invention is to provide a burlap which is promoted, and the feature of the present invention is that the burlap processed by the method of the present invention does not cause a significant decrease in strength during storage and can be used outdoors in spring. Six months after the start, the strength of the jute string dropped to ⅕ or less, and even if the jute string was not forcibly removed manually, the jute string was naturally cut and affected trees and other natural environments. There is no jute string and its processing method.

[0004]

[Means for Solving the Problems] In order to achieve the above-mentioned object, according to the present invention, a jute string made of jute is soaked in the following formulation (hereinafter referred to as the present formulation) and then dried. Prescription Cellulose degrading enzyme 10-30 g / l Bacterial culture agent 1-10 g / l Protective agent 5-15 g / l Cellulose degrading enzyme has a scientific name called cellulase. As a commercial product, Rakuto Kasei There are Entilon CM-10 and CM-20L manufactured by Co., Ltd., Cellulase XP-415 and 425 manufactured by Nagase & Co., Ltd., cellnase, and Meiseracee manufactured by Meiji Seika Co., Ltd. As a bacterial culture agent, a culture agent containing many nutrients for culturing bacteria,
Commonly available milk powder, skim milk, gravy, etc. are available. As the protective agent, starch, carboxymethylcellulose, gelatin, agar, acrylic acid-based polymers, polysaccharides, etc. have a water-absorbing and water-retaining property, and swell to a gel by absorbing water and are easily removed even by rain. Use a high molecular water absorbent. As for the method of applying the treatment liquid, the jute string is formed into a pellicle shape, immersed in the treatment liquid, sufficiently permeated, and then squeezed by a centrifuge and naturally dried. In this step, it is necessary to pay particular attention to the drying temperature, and if the temperature exceeds 40 ° C., the effect of cellulase will decrease, and this must be avoided. If necessary, the pH may be adjusted using an organic acid such as lactic acid, malic acid, succinic acid, gluconic acid, citric acid, fumaric acid or acetic acid. The amount of each drug used varies slightly depending on the weather conditions of the place of use, but in general, the range of this prescription is desirable, and below this range, the effect cannot be sufficiently exerted, and above the range, the cost becomes high, and Problems such as a hard texture will also occur.

The burlap treated with this formulation absorbs moisture or rain from the ambient air when it is used outdoors, especially in the spring.
The cellulose-degrading enzyme gradually starts its action by absorbing moisture from mist and the like and at an appropriate temperature. Cellulolytic enzymes are inactivated after a certain period of time.On the other hand, while being left outdoors, the cellulolytic bacteria existing in the natural environment from the surrounding environment, such as Bacillus met
hanigenes, Bacillus fussicularum, Bacillus cellulosae
dissolvens, Clostridium thermocellum, Bacillus ferr
ugineus, Bacillus mesentericus vulgatus, Bacillus pr
Incorporate oteus, Bacillus amylobacter, etc. It absorbs a moderate amount of water from the surrounding environment and, together with the temperature rise from spring to summer, the culture layer becomes an optimal culture site for these bacteria. In addition, the protective agent itself serves as a nutrient for bacteria, and also has a function of preventing runoff due to rain in this culture place and maintaining an appropriate humidity. In this way, bacteria are introduced into the culture area,
The bacterium propagates from spring to the rainy season and then into the summer, promoting the decline in the strength of the jute string. In this way, the jute string treated with this formulation in the spring is used for trees, and after the summer, it becomes the fall, and as the tree grows and grows, the strength of this jute string gradually decreases, and in combination with the growth of the tree. , The burlap is naturally cut. The burlap scraps that have been cut from the trees are more decayed on the ground and naturally change.

[0006]

【Example】

Example 1 A hemp string made of jute was removed, dipped in a treatment solution as shown in Table 1 and squeezed with a centrifugal separator (squeezing rate: 55%) to be naturally dried. Prescription No. 1 is blank (unprocessed). The cellulase used was Entilon CM-10, the milk powder was a general commercial product, and the starch was industrial potato starch. The pH of each formulation was adjusted to 4.5 with acetic acid.

[0007]

[Table 1]

The treated samples were allowed to stand under the conditions shown in Table 2. The standing conditions B and C are set assuming the situation during storage of each sample. After a certain period of time, the strength of each sample was measured according to JIS L-1095, and the strength retention with the sample before standing was calculated.

[0009]

[Table 2]

Table 3 shows the tenacity retention ratio when left under the conditions A, B and C, and FIG. 1 shows the tenacity retention ratio when left under the condition A.

[0011]

[Table 3]

Example 2 The same sample as in Example 1 was immersed in a treatment liquid as shown in Table 4 and then naturally dried by squeezing it with a centrifugal separator (squeezing ratio: 55%).
The standing condition was as shown in Table 2A. The results are shown in Table 3 and FIG.

[0013]

[Table 4]

[0014]

As is apparent from Table 3 and FIG. 1, when the formulation 4 is wound around a tree for 6 months outdoors as compared with the formulation 1 (untreated), the tenacity retention becomes small and the effect of the present invention is large. Recognize. In addition, Formulations 2 and 3 are obtained by removing one component of Formulation 4, but have a higher retention rate than Formulation 4, and the effect of the three-component mixture of the present invention can be understood. See also FIG.
As is clear from the above, it was confirmed that the tendency of the tenacity retention rate with the passage of days of Formulations 7 and 8 is almost the same as that of Formulation 4, and that the same effect is obtained. The storage conditions B and C were measured for the tenacity retention rate for three months during storage in the warehouse, but no significant difference was observed between the prescriptions 1, 2, 3, and 4. Therefore, the formulation 4 of the present invention has little change in strength during storage after production, but when wrapped around a tree and used for 6 months from spring to autumn, the strength of the jute string is significantly reduced during the period of use. I understood.

[0015]

[Brief description of drawings]

FIG. 1 is a condition A shown in Table 2 (around outdoor trees)
5 shows the relationship between the standing period and the strength reduction rate for each prescription in Table 1.

[Fig. 2] Fig. 2 shows the condition A in Table 2 (outdoor tree winding).
5 shows the relationship between the standing period and the strength reduction rate for each prescription in Table 4.

FIG. 3 shows an example of curing a jute string tree treated according to the present invention. In addition, 1 is a jute string, 2 and 3 are trees, and 4 is a pile.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C12S 11/00 7732-4B

Claims (2)

[Claims] 1. A jute string for trees, which is obtained by applying a cellulolytic enzyme and a bacterial culture solution to the jute string and drying the jute string. 2. A method for treating a jute string for trees, which comprises immersing the jute string in a cellulolytic enzyme and a bacterial culture solution and then drying the jute string.