JP2009240247A - Insect capturing sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insect capturing sheet for capturing and killing harmful insects and having high insect attracting effect in contrast with conventional insect capturing sheet which captures an accidentally collided insect without actively attracting the insect and, accordingly, failing in increasing the insect capturing effect owing to the lack of active insect attracting activity to necessitate the exchange of the sheet owing to the loss of adhesiveness to unable the use before the sheet is fully covered with the insects. <P>SOLUTION: The insect capturing sheet is produced by printing at least a part of a sheet and applying an adhesive agent to the printed part, wherein the printed part reflects electromagnetic waves having a wavelength band of 300-400 nm at an average reflectance ratio not less than 35%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an insect trap sheet.

  The insect catching sheet is used alone or as a part of the insect catching device. This is an adhesive applied to kill insects that have settled there. Conventionally, yellow or green printing has been applied to such sheets. This is because it is believed that this type of color is preferred by insects.

  In fact, certain insects are known to identify and be attracted to yellow or green. However, in practice, it is also known that ultraviolet rays are better identified and attracted. Therefore, it is attracted by an ultraviolet irradiation lamp.

  Therefore, as a result of investigating conventional insect trapping sheets, the inventor absorbed most of the ultraviolet rays from the ultraviolet lamp and did not reflect the ultraviolet rays. Therefore, for insects that distinguish ultraviolet rays, the insect catching sheet can be recognized as almost dark. Insects that recognize yellow or green visible light can see a little, but a little.

  In the end, the insects did not go there actively, but the insects attracted by the UV lamps only happened to collide and be caught.

  This will not increase the insect trapping effect, and the stickiness will drop before the insect trap sheet is full. When the adhesiveness drops, it cannot be used and must be replaced, which makes it inefficient.

  Accordingly, the present invention provides an insect trap sheet that actively attracts insects and has a large trapping effect.

  In view of the above situation, the present inventor has completed the insect trapping sheet of the present invention as a result of diligent research, and the feature thereof is that at least a part of the sheet is printed, and an adhesive is applied thereon. It is applied, and the printed surface reflects an average of 35% or more of electromagnetic waves in the wavelength region of 300 to 400 nm.

  Electromagnetic waves in the wavelength range of electromagnetic waves that can be recognized by insects are said to be 250 to 600 nm. Among these, it is considered that the film is particularly attracted to electromagnetic waves in the ultraviolet region, ie, near 300 to 400 nm. FIG. 1 shows a graph of the spectral luminous efficiency of insects. It can be seen that the ultraviolet rays of 350 to 380 nm are best seen.

  Therefore, the insect trapping sheet of the present invention is preferably one that strongly reflects the electromagnetic wave of 300 to 400 nm. Further, it is not necessary to strongly reflect other ultraviolet rays. On the contrary, it has been experimentally found that the reflection of ultraviolet rays of 300 nm or less is preferably as small as possible from the viewpoint that the curing and decomposition of the pressure-sensitive adhesive are accelerated. For example, at 300 nm or less, the reflectance is 30% or less, 15% or less, and the like.

Furthermore,
An average of 40% or more of electromagnetic waves in the wavelength region of 300 to 400 nm,
What reflects 15% or more of electromagnetic waves in the wavelength region of 250 to 300 nm on average is suitable. At this level, the effect is increased.

Furthermore,
65% or more of electromagnetic waves in the wavelength range of 300 to 400 nm on average,
What reflects 20% or more of electromagnetic waves in the wavelength region of 250 to 300 nm on average is more preferable.

Also,
60% or more of electromagnetic waves in the wavelength range of 350 to 400 nm on average,
An average of 50% or more of electromagnetic waves in a wavelength region of 300 to 350 nm,
What reflects 20% or more of electromagnetic waves with a wavelength range of 250 to 300 nm on average is also suitable.

  Among these, those reflecting from 20 to 50% for 250 to 300 nm and 70% or more for 300 to 400 nm are more preferable. This is because 300-400 nm ultraviolet rays can be more clearly recognized for insects attracted by 300-400 nm ultraviolet rays.

  Moreover, electromagnetic waves in the wavelength region of 300 to 400 nm are generally very well absorbed by colored pigments. Therefore, when the color pigment is used for printing the sheet of the present invention, the reflectance in this range is inevitably lowered. However, the use of a colored pigment has the effect of attracting insects that recognize the color well.

  For example, in the case of yellow or green with the naked eye, those that reflect an average of 35% or more of electromagnetic waves in the wavelength region of 300 to 400 nm are suitable. This is because the above reflection of 65% or more with these colors is actually difficult.

  In order to provide the electromagnetic wave reflection characteristics as in the present invention, the printing ink and the adhesive are problematic. That is, the ink exhibits predetermined reflection characteristics, and the pressure-sensitive adhesive prevents the electromagnetic waves from being absorbed as much as possible.

  The ink that can be used as the printing ink of the present invention should be almost the same as the reflection characteristic described in claim 1 or have a slightly higher reflectivity.

  Such inks are inks composed of pigments and vehicles having similar or similar reflective properties. Examples of the pigment include barium sulfate and aluminum hydroxide. A combination of various pigments may also be used. Furthermore, if it has such characteristics, it may be colored as well as white. In short, after mixing with the vehicle and applying the adhesive on it, it is sufficient to have the reflection characteristics as described in claim 1.

  In general, since pigments such as yellow and green absorb ultraviolet rays, when they are mixed, the amount of mixing must be taken care of so that the reflectance described in claim 1 can be secured.

Although the ink vehicle used in the present invention is free, it is desirable not to mix an ultraviolet absorber with the vehicle in order to efficiently reflect ultraviolet rays. Ordinary resins contain UV absorbers to prevent their own decomposition and curing and prolong their life, but they are not mixed specially.
Further, as the vehicle, any of a fluororesin system, a silicon resin system, a urethane resin system, and an acrylic resin system is preferable. The fluororesin system and the silicon resin system are resistant to ultraviolet rays (permeate ultraviolet rays), and the acrylic resin system is inexpensive and easy to use. In particular, an acrylic resin type that does not contain an ultraviolet absorber is inexpensive and suitable.

  In the present invention, the printing method is arbitrary, and any method such as gravure printing, offset printing, silk screen method and the like may be used. Also, a dipping method, spraying, or other special methods may be used. Furthermore, printing may be performed only on one side of the sheet or may be performed on both sides.

The entire surface of the insect trapping sheet of the present invention does not have to have the reflection characteristics described above. In other words, printing that does not have the above-described reflection characteristics (normal printing) may be performed. The same color or different colors may be used.
Such a printing method may be multi-color printing at once, as in normal printing (even if it is multi-colored, it is not necessarily a different color and may be the same for human eyes) The printing of the present invention may be first printed on the entire surface and then partially printed with normal ink.

On the contrary, after printing the entire surface with normal ink (yellow, yellowish green, etc.), the printing of the present invention may be partially printed.
In addition, when printing according to the present invention over a normal ink, there is also a method of printing by reducing the amount of the pigment in the ink of the present invention. This is because the printing ink of the present invention allows electromagnetic waves to pass to some extent and reflects visible light below.

  As a pattern for printing different colors on this single sheet, a stripe pattern, a polka dot pattern, a concentric circle pattern, a pattern of insects and various shapes, a pattern of plants such as flowers and fruits, a completely random shape, and the like are free. For example, the ink of the present invention and normal ink are alternately printed in a 1 cm-wide striped pattern as a sheet having a size of about 50 × 50 cm.

  Furthermore, you may print using the ink containing a luminous pigment or a fluorescent pigment instead of a normal pigment. Since these irradiate visible light or ultraviolet light for a certain period of time even after the light irradiation is stopped, they are very effective in a place without an ultraviolet lamp or a fluorescent lamp. The printing method and the like may be the same as those for the yellow and yellow-green inks described above.

  An adhesive is applied above the printed surface. The pressure-sensitive adhesive may be the same as a conventional insect trapping sheet, and may or may not contain a UV absorber. In order to efficiently transmit ultraviolet rays, a fluororesin system, a silicon resin system, a urethane resin system, or an acrylic resin system is preferable. Moreover, even if it is a polybutene type | system | group etc., the thing which does not put an ultraviolet absorber is cheap and suitable.

  Here, the sheet is a thin film-like material such as paper, plastic film, and non-woven fabric. The sheet may have a normal rectangular shape, but may have a tape shape with a small width.

  This insect trapping sheet may be used not only by a method of sticking inside a normally used insect trapping apparatus but also completely separately from the insect trapping apparatus. It can be used in the form of a tape, hung above the display shelf for fresh food, or placed next to the entrance where insects are not needed. Since sunlight and ordinary fluorescent lamps also contain ultraviolet rays, they receive the electromagnetic waves and reflect the ultraviolet rays. If normal colors are also printed, they also reflect visible light with those lights.

The insect trapping sheet of the present invention has the following great advantages.
(1) Unlike the conventional sheet, the present insect trapping sheet actively reflects ultraviolet rays, so that the insects are attracted and the trapping effect is great.
(2) In the sheet in which the ink of the present invention and the visible light reflecting ink are separately applied, the sheet attracted by visible light is also effective, and the insect trapping effect is further improved.

Hereinafter, the present invention will be described in more detail based on embodiments.
Example 1
As a vehicle, 22 parts by weight of urethane resin, 22 parts by weight of barium sulfate powder, 22 parts by weight of aluminum hydroxide powder, and 34 parts by weight of a solvent (alcohol solvent) were mixed to prepare an ink.
Separately, normal yellow ink and yellow-green ink were prepared.

Using this ink, printing (a thickness of 25 μm with a roll coater) was applied to the paper 1 as shown in FIG. It is a striped pattern with equal widths. Ink 2 of Example 1 is white, and sequentially yellow 3 and yellow-green 4. A pressure-sensitive adhesive (polybutene type and no UV absorber) is applied to the surface with a normal thickness of 100 μm.
This was pasted next to the window of a local convenience store so that it could be illuminated by a convenience store. Considerable insects were attracted and captured without the use of UV lamps. Also, there was a certain degree of attracting effect during the daytime. Of course, if this is attached to the insect trapping device instead of the conventional insect trapping sheet, the effect is greater.

  FIG. 3 shows another embodiment of FIG. 2, in which flexographic printing with a thickness of 20 μm was performed. In this example, two types of yellow-green 4 and ink 2 of Example 1 were used. An example of this is a checkered pattern. This also had a considerable effect. The pressure-sensitive adhesive was the same as in FIG.

Next, the reflection characteristics of electromagnetic waves will be described.
FIG. 4 is a graph obtained by irradiating a thin gray plate made of ABS resin with an electromagnetic wave and measuring the reflectance of the electromagnetic wave in each wavelength region. As can be seen from this figure, the electromagnetic wave in the wavelength region of about 300 to 400 nm has almost no reflection and is about 10 to 20%.

  FIG. 5 shows the same measurement of a plate used in FIG. 4 coated with an ink containing titanium oxide as a pigment (acrylic vehicle 10 wt%, pigment 50 wt%, other toluene organic solvent) with a thickness of 20 μm. Is. Also in this example, it can be seen that the reflection is small at 300 to 400 nm as in FIG.

  In FIG. 6, only the pigment of the ink used in FIG. 5 is changed to barium sulfate, and the mixing amount and the coating amount are the same. From this figure, it can be seen that barium sulfate is largely reflected in the region of 300 to 400 nm.

  7 and 8 are similar to FIG. 6, but are examples in which the pigment is aluminum oxide or aluminum hydroxide. It can be seen that these are also greatly reflected.

  FIG. 9 shows an example of an ink in which 10% by weight of a fluororesin, 25% by weight of aluminum hydroxide powder, 25% by weight of calcium carbonate powder, and 40% by weight of a solvent are mixed as a vehicle. The results of spectroscopic analysis of reflected light using a thin coating of this ink on white coated paper (coating thickness of about 20 μm) are shown. As is apparent from this figure, it can be seen that 300 to 400 nm is reflected very well.

  FIG. 10 shows the result of spectroscopic analysis of the reflectance of a transparent adhesive (acrylic adhesive and no UV absorber) applied to the printed surface of FIG. 9 with a thickness of 100 μm. It can be seen that the adhesive applied in this way sufficiently reflects the ultraviolet rays.

  FIG. 11 is the same as the example of FIG. 9, but only the vehicle uses an acrylic resin. Also in this example, it can be seen that 300 to 400 nm is reflected very well.

  FIG. 12 shows the result of spectroscopic analysis of the reflectance of a transparent adhesive (polybutene adhesive and no UV absorber) applied to the printed surface of FIG. 11 with a thickness of 100 μm. As is the case with FIG. 10, it can be seen that the ultraviolet rays are sufficiently reflected.

  FIG. 13 shows an example of an ink in which 10% by weight of an acrylic resin, 50% by weight of aluminum hydroxide powder, 2% by weight of a yellow pigment, and 38% by weight of a solvent are mixed as a vehicle. That is, FIG. 11 is the same as the vehicle and others, but a yellow pigment is inserted instead of the white pigment calcium carbonate. In this example, since the yellow pigment is in the way, the reflectance of the printed surface is reduced to some extent, but it can be seen that almost 40% or more is reflected. Even in this case, there is a great effect as compared with the conventional one that hardly reflects.

  FIG. 14 is obtained by applying a transparent surface adhering agent (polybutene-based adhesive without an ultraviolet absorber) with a thickness of 100 μm to that of FIG. Although it is a little lower, it is still effective.

  FIG. 15 is a graph of spectroscopic analysis of electromagnetic waves irradiated by a normal ultraviolet lamp. In this ultraviolet lamp, there are peaks at 360 nm and 440 nm, and the amount of light is 360 to 380 nm. When this is compared with FIG. 1, it is understood that the reflectance at 360 to 380 nm should be large.

  FIG. 16 is a spectral analysis result of reflectance when the ultraviolet ray lamp of FIG. 15 is irradiated on the printing surface of FIG. It can be seen from FIG.

It is a graph of the spectral luminous efficiency of an insect. It is a top view which shows an example of the insect trap sheet of this invention. It is a top view which shows the other example of the insect trap sheet of this invention. It is the graph which measured the reflectance of the plastic board. It is the graph which measured the reflectance of titanium oxide. It is the graph which measured barium sulfate reflectance. It is the graph which measured the reflectance of aluminum oxide. It is the graph which measured the reflectance of aluminum hydroxide. It is the graph which measured the reflectance of the printing surface used for this invention. It is the graph which measured the reflectance of what applied the transparent adhesive to the printing surface of FIG. It is the graph which measured the reflectance of the other printing surface used for this invention. It is the graph which measured the reflectance of what applied the transparent adhesive to the printing surface of FIG. It is the graph which measured the reflectance of the other printing surface of this invention. It is the graph which measured the reflectance of what applied the transparent adhesive to the printing surface of FIG. It is a graph of the spectral analysis of the irradiation electromagnetic wave of a normal ultraviolet lamp. It is a spectral-analysis result of a reflectance when the ultraviolet lamp of FIG. 15 is irradiated to the printing surface of FIG.

Explanation of symbols

1 Insect capturing sheet 2 Invention ink 3 Yellow ink 4 Yellow green ink

Claims (9)

An insect trap, which is printed on at least a part of a sheet and coated with an adhesive, and reflects 35% or more of electromagnetic waves in the wavelength region of 300 to 400 nm on the printed surface on average. Sheet. On the printed surface,
An average of 40% or more of electromagnetic waves in the wavelength region of 300 to 400 nm,
The insect trap sheet according to claim 1, which reflects an average of 15% or more of electromagnetic waves in a wavelength region of 250 to 300 nm. On the printed surface,
60% or more of electromagnetic waves in the wavelength range of 350 to 400 nm on average,
An average of 50% or more of electromagnetic waves in a wavelength region of 300 to 350 nm,
The insect trapping sheet according to claim 2, which reflects an average of 20% or more of electromagnetic waves in a wavelength region of 250 to 300 nm. 4. The insect trap sheet according to claim 1, wherein the printed surface is white to the naked eye and reflects an average of 65% or more of electromagnetic waves in a wavelength region of 300 to 400 nm. The insect trapping sheet according to claims 1 to 3, wherein the printed surface is yellow with the naked eye and reflects an average of 35% or more of electromagnetic waves in a wavelength region of 300 to 400 nm. The insect trapping sheet according to claims 1 to 3, wherein the printed surface is green with the naked eye and reflects an average of 35% or more of electromagnetic waves in the wavelength region of 300 to 400 nm. The insect trapping sheet according to claim 1, wherein an ultraviolet absorber is not mixed in the ink vehicle used for the printing. The insect trapping sheet according to claim 1, wherein a part of the sheet is printed with normal ink. The insect trap sheet according to claim 1, wherein the adhesive is not mixed with an ultraviolet absorber.

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