JPH03241611A - Noxious creature evading cable - Google Patents

Abstract

PURPOSE:To evade various harmful creatures such as rats and termites over a long time by forming a cable outer layer of a coating material containing a terpenoid group evading agent. CONSTITUTION:In this cable, a cable outer layer is coated with a cable sheath 6 containing a terpenoid group evading agent. This terpenoid compound monomer is a group of compounds contained by vegetable oil or resin rubber material to be obtained by steam distillation of various parts of plants and its essence is a substance containing two or more pieces of isoprene and it can be either of mono-terpenoid of the carbon number 10 (C5X2), sesqui-terpenoid of the carbon number 15 pieces (C5X3), diterpenoid of the carbon number 20 pieces (C5X4) and triterpenoid of the carbon number 30 pieces (C5X6). Thereby, the effective component inside a terpenoid group evading agent is gradually volatilized and scattered from the cable outer layer to evade creatures such as rats and termites inflicting various harms on wires - cables widely and over a log term.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a pest repellent cable that prevents damage caused by rats, termites, etc.

(Prior Art) Due to the diversification of usage environments in recent years, electric wires and cables are increasingly being damaged by living things such as rats, termites, shipworms, and mold.

Conventionally, so-called pest repellent cables have been used to prevent this type of damage.

In other words, rodent-proof cables that contain cycloheximide as a repellent in the cable sheath material to protect against rodent damage, cables whose surfaces are coated with tough polymers such as nylon or high-density polyethylene, or metal sheaths. Termite-proof cables are coated with a metal sheath to protect them from damage caused by termites, cables are similarly coated with metal sheaths to protect them from ship-eating insects, and organic arsenic compounds are added to the sheath material to prevent damage from mold. Anti-mold cables and the like are generally known as pest repellent cables.

However, most of these were developed by specifying the organisms that are expected to have a repellent effect, and because the types of repellent organisms are limited, they have had the problem of not being able to respond to the recent diversification of the environment in which cables are used. In other words, if we were to expect a wide range of repellent effects against a variety of living things, we would have to add a combination of many repellents or form multiple repellent layers of various types, which could lead to deterioration of the characteristics of the cable. .

In addition, conventional repellents do not have long-lasting effects, so cables that have been given a repellent effect by adding repellents have the problem that the repellent effect quickly disappears, and the use of metal sheaths However, there was a problem that the cable had poor flexibility.

(Problem to be solved by the invention) Pest-repelling cables such as termite-proof cables have been used to protect electric wires and cables from harmful organisms, but the organisms that have a repelling effect are limited. Moreover, there were problems in that the effect was not long-lasting and good cable characteristics could not be obtained.

The present invention has been made to solve these conventional problems, and has a wide range of repellent effects against various living things that are harmful to electric wires and cables, maintains this excellent effect over a long period of time, and The purpose of the present invention is to provide a pest-repellent cable that does not impair the original characteristics of the cable and does not cause harm to the environment or humans or livestock.

[Structure of the Invention] (Means for Solving the Problems) The pest repellent cable of the present invention is characterized in that the outer layer of the cable is formed of a coating material containing a terpenoid repellent.

Terpenoid repellents used in the present invention include those containing terpenoid compound monomers, low polymers, low copolymers, etc. as repellent components.

Terpenoid compound monomers are a group of compounds contained in plant essential oils or resin gums obtained by steam distillation of various parts of plants, and essentially contain 2 or more isoprenes and have 10 carbon atoms (C5 ×2)
Monoterpenoids having 15 carbons (Cs x 3), diterpenoids having 30 carbons (05x4), and triterpenoids having 30 carbons (C5XG) can all be used.

These terpenoid compounds are aromatic and essential oil components of plants, and are substances that do not affect the natural cycle at all, and are therefore harmless to humans and animals.

Terpenoid compound monomers that can be used in the present invention include β-myrcene (CIoH16), alloocimene (CIoH16),
oH16), citral (C1oH160), linalool (CHO), limonene (C1oH16) 0 16 dipentene (C1oH16), terpinene (C1oH1
6), Terpineol (C1oH180), Anethole (CHO), Pinene (Ct o Hte), Noboru (CHO), Camphene (C1oH6), No]1
19 Pylacetate (C13H2102), isobornyl acetate (C12H2oO2), etc. are exemplified.

In addition, low polymers and low copolymers of these terpenoid compound monomers include polymer average molecular weights of 1000 or less,
A polymer having a degree of polymerization of dimer to heptamer is suitable.

Each of these may be used alone or in a mixture, but from the viewpoint of sustainability of the repellent effect, the amount of low polymer or low copolymer is at least 5% by weight of the total terpenoid compounds. It is desirable to contain the above amount.

In the present invention, these terpenoid compounds may be incorporated as they are as terpenoid-based repellents into the sheathing material base material constituting the cable outer layer, but in order to maintain the effect over a long period of time, it is also possible to add these terpenoid compounds to the sheathing material base material. In order to facilitate dispersion and avoid impairing the cable properties, it is more desirable to use these terpenoid compounds in the form of so-called microcapsules by supporting them on porous inorganic particles.

By microencapsulating, even if a terpenoid compound monomer, which has a rather poor sustainability of effect as it is, is used alone, a practically sufficient long-term sustainability can be obtained.

As the porous inorganic particles, for example, hollow particles having a particle size of about 0.5 to 150 μm and a surface pore size of about 20 to 1.000 μm manufactured by an interfacial reaction method are preferably used. be done.

Examples of inorganic materials that make up the granules include alkaline earth metal carbonates (alkaline earth metal carbonates, barium carbonate, magnesium carbonate, etc.), alkaline earth metal silicates (calcium silicate, barium silicate, magnesium silicate, etc.), and metal oxides. thing(
silica, cobalt oxide, nickel oxide), metal carbonates (
cobalt carbonate, nickel carbonate, basic copper carbonate, etc.), metals (cobalt, nickel, copper, etc.), and the like.

Microencapsulation methods include, for example, mixing the above-mentioned terpenoid compound and porous inorganic particles under reduced pressure and then gradually returning the pressure to normal pressure, or reducing the pressure after mixing and then gradually returning to normal pressure. A return method can be used.

When using a terpenoid compound in microcapsule form, a retention agent can be included together with the terpenoid compound in order to further enhance the sustainability of the repellent effect.

Examples of the retention agent include polyhydric alcohols (glycerin, propylene alcohol, sorbitol, polyethylene glycol, etc.), sugars (sucrose, lactose, glucose, etc.), diethyl phthalate, benzyl benzoate, and the like.

The pest repellent cable of the present invention uses such a terpenoid compound or a microencapsulated terpenoid compound in a general cable coating material such as a vinyl chloride resin composition, a polyolefin resin composition, a chloroprene rubber composition, or a polyester. It can be obtained by adding the elastomer to a urethane elastomer, etc., and coating the cable core directly or via another coating layer using a method suitable for each composition.

The thickness of the layer containing terpenoid repellent is 0.1+
It is desirable that the content is 0.05 to 1 nm or more as a terpenoid compound which is an effective repellent ingredient.
It is preferable to set it as O weight%, and the more preferable range is 0.
．． It ranges from 10 to 5% by weight. Layer thickness is 0.1+n
If it is thinner than n+ or if the content of terpenoid compounds or substances is less than 0.05% by weight, the repellent effect will be insufficient,
Moreover, if the content exceeds 10% by weight, there is a risk that the mechanical properties of the cable will deteriorate, which becomes a problem especially when the layer containing the repellent also serves as a cable sheath.

FIG. 1 is a cross-sectional view showing an example of the pest repellent cable of the present invention, in which an insulator 2 such as cross-linked polyethylene is placed on a conductor 1.
A cable made of a vinyl chloride resin composition or the like containing a terpenoid repellent on the outer periphery of the three cable cores 3 which are twisted together with a jute or other intermediary 4 and pressed and wrapped with a pressing tape 5. It has a structure in which a sheath 6 is provided.

In a cable with such a structure, the effective repellent component from the terpenoid repellent in the cable sheath 6 gradually evaporates and repels creatures such as rats and termites over a long period of time, making it possible to protect the cable from these creatures. .

(Function) In this way, in the pest repellent cable of the present invention, the active ingredient in the terpenoid repellent gradually evaporates from the outer layer of the cable, thereby widely eliminating various organisms that cause harm to electric wires and cables, such as rats and termites. Avoid for a long time. Moreover, the cable's original characteristics are not impaired, and there is no risk of polluting the environment or harming humans or animals.

(Example) Next, examples of the present invention will be described.

Examples 1 to 12 A compound was obtained by mixing each component with a mixing roll according to the formulation shown in the table, and this was mixed with an insulator 2 made of cross-linked polyethylene around the outer periphery of a conductor (cross-sectional area 22 mj) 1 as shown in FIG. A cable sheath 6 is applied to the outer periphery of the cable core 3 with a thickness of 0.2+nn under the temperature conditions shown in the table.
A pest repellent Kepur was produced by coating with +.

In addition, microcapsule A in the table contains 32 alloocimene.
After mixing 1 m part of FF and 43 parts by weight of sesquiterpene, silica-based porous microcapsules (particle size 5
Microcapsule B was prepared by mixing 25 parts of microcapsules (with a surface pore diameter of 100 μm) and then returning the pressure to normal pressure. Thereafter, 25 parts of silica-based porous microcapsules (particle size: 5 μm/surface pore size: 100 μm) were mixed under reduced pressure, and then the pressure was returned to normal pressure.

Next, from each of these pest repellent cables, 10 to 1.
5 am test pieces were cut out and various repellent effect confirmation tests were conducted using the following methods.

Test 1 (Mouse repellent test) A test piece (LOEM) was placed in a rat cage together with water and left for one week to observe whether there was a repellent effect. The test was conducted five times for each cable.

Test 2 (Ant repellent test) A test piece (10 cm) was placed in a petri dish with food (black pine), and 100 termites and soldier ants were added to the test piece.
The samples were left for 4 weeks at a temperature of 8±2°C, and the presence or absence of a repellent effect was observed. The evaluation ranges from 0 (no damage) to 11 (depending on the damage situation).
The results were divided into 12 ranks (severe damage). The relationship between rank and damage status is as follows.

1: Adhesion of ant soil is observed, but there is no feeding damage.

2-3: Ant soil and slight feeding damage are observed at the cut end.

4 to 6: Feeding damage progresses starting from the cut end.

7-9...Partial feeding damage is also observed on the central surface.

lO~11... Feeding damage spread over the entire area.

1] Test 3 (Test for repelling Sargassum) Three test pieces (1.5 cm) were immersed at intervals of 5C11 in a container containing 500 ml of seawater in which 200 Sarus larvae that had reached the (I) breeding stage were grown, and for 24 hours. The adhesion rate of Fujibbo after that was investigated.

Test 4 (Ship-eating insect repellent test) Two test pieces (15 cm) and water supply (1 cm square, length 15 cm)
m) were buried alternately in the soil where 50 ship-eating insects were growing, and left for 4 weeks to observe whether there was a repellent effect.

Evaluation is from 0 (no damage) to 0 (no damage) depending on the damage situation according to Test 3.
It was divided into 12 ranks, 11 (severe damage).

Test 5 (anti-mold test) Place a test piece (10 cm) on an agar medium in a petri dish,
Top 5 bacterial species, Aspergillus 1usc
lavatu, C, tropicaljs, Pus
arium moniliforme.

Pcnicjllium citrinum, T
richophytonmentagrOphytes
A mixture of these was uniformly applied and left to stand for 4 weeks, and the presence or absence of repellent effect was observed.

The above results are shown in the lower column of the table.

] 2 For comparison, instead of the terpenoid repellent, a cycloheximide preparation (manufactured by Tanabe Pharmaceutical Co., Ltd., trade name Naramycin) and an organic pyrifos preparation (manufactured by Yoshitomi Pharmaceutical Co., Ltd., trade name 1) were used.
Migard OX), 0BPA (10,10'-oxybisphenoxyarsine) preparation (Antifungal agent manufactured by Pentron, trade name Vinyzene) Cables manufactured in the same manner as in the Examples (Comparative Examples 2 to 4.8) .9)
Similar repellent effect confirmation tests were also conducted on cables manufactured without any repellent added (Comparative Examples 1.5 to 7). These results are also shown in the table along with their compositions.

(The following is a blank space) 3 [Effects of the Invention] As is clear from the above examples, the f-i parasite repellent cable of the present invention not only exhibits excellent repellent effects over a long period of time for a wide variety of organisms, but also causes no environmental pollution. The outer layer of the cable is made of a terpenoid-based repellent that is not harmful to humans or animals, so it can be widely applied to wires and cables in all usage environments, and these wires and cables can be used in a variety of ways. It can protect living things from harm.

Moreover, the original characteristics of the cable are not impaired.

Furthermore, the pest repellent cable of the present invention not only protects the cable itself, but also protects the surrounding environment from harmful animals.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one structural example of the pest repellent cable of the present invention, and FIG. 2 is a cross-sectional view showing another structural example of the present invention. ]......Conductor 2...Insulator 5 3...Cable core 6...
...Cable sheath containing terpenoid repellent

Claims (1)

[Claims] (1) A pest repellent cable characterized in that the outer layer of the cable is formed of a coating material containing a terpenoid repellent.