JPS63722Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a vapor sustained release material (volatile substance sustained release material), which can be easily manufactured by mass production means, and To provide a sustained vapor release material that can be easily installed in a short time at a place where a volatile substance should exert its effect, and can be stably maintained at the installed place for a long period of time.

(Prior art) In recent years, volatile substances such as fragrances, insecticides, fungicides, and insect sex pheromones have been stably placed over long periods of time in predetermined locations where these volatile substances should exert their effects. The very gradual and continuous dissipation of the vapors of these volatile substances has become an extremely important technical problem in practice.

JP-A-Sho was developed based on the above issues.
Japanese Patent Application No. 57-156403 discloses a vapor controlled release body in which a volatile substance is stored inside a thin tube made of a polymeric material and a metal wire joined (attached) in the axial direction of the thin tube. The thin tube attached with this metal wire has excellent formability, so it can be easily formed into any shape, and it can be stably installed at a desired location for a long period of time, and in large quantities. It can be supplied by means of production.

However, since this sustained-release material has a structure in which a metal wire is attached to a thin tube, the manufacturing cost and the filling cost of volatile substances are high, it takes some time to install, and the location where it is installed after use is high. It is troublesome to remove from the plant, and when it is installed on fruit trees or other trees as a sustained release agent for insect sex pheromone, the metal wire may damage the pruning knife if pruning is performed as it is.

(Structure of the device) The present invention solves these disadvantages. It is a thin tube made of a polymeric material that stores a volatile substance inside and is closed at both ends. The present invention relates to a vapor sustained release body having a shape bent at an angle of .

The present invention will be explained in detail below.

The sustained vapor release body of the present invention has an external shape shown in Fig. 1,
It has the vertical cross-sectional structure shown in Fig. 2, and both ends 1 and 2 of the thin tube made of a polymeric material serving as the vapor controlled release body are sealed by means such as heat fusion, and the angle is 90° at one point 3 on the axis. It is bent (bent, curved) at the following angles. A volatile substance (liquid) 5 is sealed inside the thin tube, and this liquid 5 permeates the tube wall 4 and is gradually released from the outer wall surface of the tube.

The polymeric material constituting the sustained release body (tubule) is a two-dimensional polymer such as polyolefin, polyacrylic, polymethacrylic, polyamide, polyester, fiber derivative, organopolysiloxane, etc. itself or a plasticizer, lubricant, or stabilizer. It can be selected as appropriate from those that can be processed into a tubular shape by commonly known extrusion molding methods, such as mixtures containing
In addition to plasticizers, lubricants, and stabilizers, colorants, ultraviolet absorbers, etc. are mixed as necessary. Further, it is also possible to use a material formed into a tubular shape by extrusion or the like, and then made three-dimensional by a crosslinking reaction.

The dimensions of the thin tube are 0.2mm to 20mm inner diameter and 0.1mm wall thickness.
to 5 mm, and the length should preferably be at least 3 times the outer diameter. If the inner diameter is thinner than 0.2 mm, it will be extremely difficult to manufacture a thin tube and it will not be easy to fill the inside with a volatile substance, so it is not practical. It will be disadvantageous. In addition, when the inner diameter becomes larger, it becomes possible to fill a large amount that can maintain sustained release for a long period of time (usually more than one year's worth of volatile substances can be stored, considering the required vapor concentration of volatile substances). However, sustained-release products have disadvantages such as deterioration during use if exposed to direct sunlight or outside air for too long, and also have the disadvantage that the release rate decreases and is not constant as release progresses. Wall thickness, together with material selection, greatly affects the evaporation rate of volatile substances, so it is necessary to choose an appropriate wall thickness, but in general, it is extremely difficult to mold anything thinner than 0.1 mm, and it is necessary to make it thicker than the above range. This would be economically wasteful and practically meaningless. If the length of the capillary is too short, it may be impractical due to stability issues when installed at a predetermined location.

In the present invention, it is important that the sustained-release body (tubule) is bent at an angle of 90° or less at one point on the axis, and the inventors have investigated various structures. If the refraction angle is larger than the above angle, the installation stability will be poor and the wind speed will be lower.
If the wind blows at a speed of 15 m/sec or more, the object will fall or scatter, making it impossible to achieve the purpose. However, if the angle is set to less than 90 degrees, the suspension from tree branches, etc. will be reliably and stably carried out, and the above-mentioned It turned out that the disadvantage was resolved.

Note that the sustained-release body may be substantially provided with a seal or a partition wall at one or more locations in the capillary, and the performance as a sustained-release body will not be adversely affected. In addition, the shape of the sustained release body (tubule) is not limited to those shown in Figures 1 and 2, as long as it is bent at an angle of 90° or less at one point on the axis, but for example, the shape shown in Figure 3 is acceptable. It can also be from.

Volatile substances stored inside the tubules include fragrances, insecticides, fungicides, insect sex pheromones, etc.
It covers all substances that act in a vapor state and are used singly or as a mixture of two or more. Note that antioxidants, colorants, etc. are added to these volatile substances as necessary.

Since the vapor controlled release material of the present invention has the shape and structure described above, when it is applied as a controlled release material for insect sex pheromone substances, it is suitable for use in trees with dense branches such as tea trees. By simply hanging the bent part of the sustained release material on a branch, it is possible to maintain the installation stably for a long period of time even in strong winds, and the desired effect can be achieved over a long period of time. be able to.

The vapor sustained release material of the present invention is applied to the sustained release of various volatile substances, but when used as a sustained release material for insect sex pheromone substances, the target crops and trees must be the height of the tree. Crops and garden trees that are low and are less affected by the wind, have thin branches and dense branches and leaves, such as tea trees, grape trees, strawberries, soybeans, tomatoes, cucumbers, boxwood, azalea, azalea, Japanese azalea, Japanese cypress, etc. Garden trees such as

[Brief explanation of the drawing]

Figure 1 shows the external shape of the sustained vapor release body of the present invention, Figure 2
The figures show their longitudinal cross-sectional structures. Moreover, FIG. 3 shows a vapor sustained release body having another shape. 1, 2... end of thin tube, 3... bending point, 4...
Pipe wall, 5...volatile substance.

Claims (1)

[Scope of utility model registration request] A controlled vapor release body that is a thin tube made of a polymeric material that stores a volatile substance inside and is closed at both ends, bent at an angle of 90 degrees or less at one point on the tube axis.