JPH11169050A - Acarid catching mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new acarid catching mat not exterminating acarids causing atopic dermatitis, asthma, etc. with an ascaricide by using chemicals, but catching the acarids and making them die. SOLUTION: This acarid catching mat is made by attaching a pressure- sensitive adhesive resin to a base material having open air cells and/or communicated air spaces by impregnating, spraying or roll coating while leaving the air cells or gaps exist and not making a filmy film on the surface of the base material. In the mat, an acarid got into the cell or the space is caught by the pressure-sensitive adhesive agent having suitable adhesiveness and made to death. The acarid caught by the adhesive agent is not floated in air. Especially, the acarid catching mat using a soft urethane foam as a base material and a pressure-sensitive adhesive resin made of a urethane can repeatedly be used because the acarid is exterminated by adjusting the adhesiveness and washing in water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a futon, a seat, a bed, a cushion,
The present invention relates to a mat that imparts pressure-sensitive adhesiveness to a mat, an undercarpet, and the like to capture mites.

[0002]

2. Description of the Related Art There are more than 100 types of mites that live in homes, and the damage is increasing as a symptom represented by atopic dermatitis and Zensoku. In recent years, it has been found that about 80% of the causes of atopic dermatitis and Zensoku are due to mites. At present, such measures against mites are limited to those using chemicals or fibers that do not allow the mites to penetrate.

[0003]

With the conventional method for exterminating mites, it is difficult to exterminate the mites completely, and since dead dead mites remain in a floating state like garbage and dust, respiration is difficult. There is a problem that it easily enters the body from the vessel and causes various pathologies.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the problems of the prior art by providing mats such as futons, sheets, beds, cushions, mats, undercarpets, tatami mats, etc. where mites are particularly preferred. It is intended to provide a mat that captures mites and causes death as it is applied to wood, and that does not allow dead bodies to float. That is, the present invention
By impregnating, spraying or roll coating a substrate having open cells and / or communicating spaces with a pressure-sensitive adhesive resin so that a film-like film is not formed on the surface of the substrate while bubbles or voids are present. It is a mite capture mat characterized by being provided. Conventionally, mats that trap mites are usually discarded, but the tick-trapping mat of the present invention does not lose its effectiveness even after repeated washing, especially when a urethane pressure-sensitive adhesive is used. It can be used for a stable period.

[0005] The substrate used in the present invention is a substrate having open cells and / or communicating spaces.
Textiles such as fabrics, non-woven fabrics, felts, straw materials forming tatami mats, and resin foams such as urethane, polyethylene, polypropylene, and vinyl chloride having open cells are provided, and have a space for mites to enter. Since the size of the mites is 0.1 mm inside and outside, when the base material used is a fibrous product, the opening degree of the communication space is used, and when the foamed product has open cells, the bubble size is 0.05 mm for both. It is necessary to do above. If the size is smaller than this, the probability that the mites will be trapped will decrease because the mites cannot enter and spread inside. In the case of a foam base material, if the cell size is too large, the feel at the time of use deteriorates, so the preferable cell size is 0.1 to
It is about 0.5 mm.

It is shown in Reference Example 1 below that the air bubbles or non-woven cloth for efficiently capturing mites needs to have an opening degree of 0.05 mm or more.

As the pressure-sensitive adhesive resin used in the present invention, a material having an adhesiveness of 500 to 5000 g / cm ² can be used. For example, polyurethane, acrylic, silicone,
Resins such as vinyl acetate, styrene-butadiene, and polyvinylidene chloride. However, it is not particularly limited to these materials.

A study on the degree of adhesion for efficiently capturing mites is shown in Reference Example 2 below. According to Reference Example 2, if the degree of adhesion is 500 or more, a tick can be captured with a high probability. If the degree of adhesion is less than 500 g / cm ² , the probability that the mite will escape even if it adheres to the adhesive is high, and it is difficult to capture large ticks. If it exceeds 5000 g / cm ² , the performance of capturing mites is good. However, when sitting or sleeping, the base material sticks due to the adhesive strength, and the cushioning property and the restoring property deteriorate. In addition, there is a commercial product that captures cockroaches with an adhesive, but the cockroaches are large and have a strong force, so that the adhesive force is extremely strong, and the range of the adhesiveness is 5000 g / c.
m ² or more, and the constitution is different from that of the present invention because the pressure-sensitive adhesive is applied on the surface of the base material in the form of a film.

[0009] Soft urethane foams are often used for cushions, sheets and mats used in actual furniture, bedding and automobiles, and when these foams are given mite-trapping performance, pressure-sensitive adhesives are required. When the same urethane as the base material is used as the adhesive resin, the degree of adhesion between the base material and the pressure-sensitive adhesive is improved, the control of the adhesive force is easy, and the mites are removed by washing and reused. This is because urethane resin pressure-sensitive adhesives exhibit tackiness due to the presence of hydroxyl groups (OH groups) on the surface, so that washing with water temporarily reduces the adhesiveness of the pressure-sensitive adhesive significantly. Due to the ability to remove ticks. Washing can be repeated as many times as necessary, and after drying, pressure-sensitive adhesiveness is restored, making it a product that can withstand repeated use for a long period of time. .

[0010] A substrate is selected and uniformly adhered to the substrate by impregnation with a resin having pressure-sensitive adhesiveness, spraying, roll coating or the like. In this case, it is important that the pressure-sensitive adhesive resin does not form a film-like film on the surface of the substrate, and the resin is allowed to penetrate into the inside of the substrate, and to cure the resin while bubbles or voids are present. is important. The purpose of preventing air bubbles or spaces from being blocked is to secure cushioning properties and to induce mites inside when used. When the amount of the pressure-sensitive adhesive resin used is too large, the resin becomes hard and the cushioning properties decrease.

As a method of impregnating the resin, simply applying, spraying or dipping a predetermined amount of the resin on the base material increases the area for forming a film-like film on the surface, and blocks air bubbles and voids. For this reason, it is effective to apply the resin by various methods and then compress it with a roll or a press to coat the foam or void forming material, or to blow air on the surface after application. Then, the resin applied to the heating furnace is immediately cured in a heating furnace to prevent the resin coated on the foam or void forming material from flowing down and to ensure a uniform film thickness.

The mat produced in this way bends when pressed, but completely recovers after 1 to 55 seconds when decompressed. The thickness of the substrate is not particularly limited, and the thickness can be selected according to the use of the mat or a desired feeling of use.
The thickness of the adhesive resin to be impregnated into the base material (the distance from the mat surface, where the adhesive resin has penetrated into the mat) is not particularly limited, and since mites are captured near the surface, a few mm is sufficient. . That is, since the thickness of the mat and the thickness of the adhesive resin-impregnated layer can be appropriately selected depending on the use of the mat, the thickness may be thin or thick as long as the thickness of the adhesive resin-impregnated layer can be ensured. . In addition, ticks have a habit of liking dark places and have a propensity to sneak into the void, so adjust the adhesiveness and thickness to determine the thickness of the mat that makes it easy to enter the void and improve the probability of capturing mites You can also.

[0013]

EXAMPLES The present invention will be described in more detail with reference to examples and examples. Reference Example 1 The relationship between the degree of opening of air bubbles or nonwoven fabric and the capture of mites was examined. Base material: urethane foam (Everlight SF: manufactured by Bridgestone) 1) HR-20 (cell size: 0.5 to 1.0 mm) 2) HR-30 (cell size: 0.3 to 0.5 mm) 3) HR-40 (bubble size: 0.2 to 0.3 mm) 4) HR-50 (bubble size: 0.05 to 0.2 mm) Method: Place about 200 to 300 dust mites on the above substrate, The state of diffusion over time was observed with a stereoscopic microscope. The result is as follows. Results: 1) HR-20: The foam cell size is quite large.
Mite spreads very quickly inside. 2) HR-30: The foam has a medium cell size. Mite spreads very quickly inside. 3) HR-40: The foam has a fine cell size. The spread of ticks into the interior spread with little resistance. 4) HR-50: The cell size of the foam is very fine.
As for the diffusion of the mites into the interior, several large females (adults) were caught by the small bubble size part. From these results, it is necessary for the mite (dust mite) to have a bubble size of 0.05 mm or more in order to diffuse into the bubbles or the opening.

Reference Example 2 The relationship between the capture of ticks and the degree of adhesion was examined. [Test 1: Diffusion and capture rate of mites] Substrate: After applying pressure-sensitive adhesives having different degrees of adhesion on a polyester resin plate having a diameter of 6 cm, they were cured at room temperature for 7 days. Adhesive: The degree of adhesion was adjusted by changing the mixing ratio of the following materials. Main agent (Hyprene P-302: manufactured by Mitsui Tosho Chemical Co., Ltd.) Curing agent (PPG Diol-3000) Catalyst (25% DOP solution of lead octylate) Method: About 200 to 300 at the center of a circular adhesive sheet
Dust mites are placed and spread in a light-shielded environment at a temperature of 25 ° C and a humidity of 75%, and the state changes over time (0.5, 5,
1, 2, 4, 8, 12, and 24 hours).
It shows the arrival time of the individual who has reached the outer periphery (moving 3 cm) fastest. 2 shows the percentage of solids captured on the adhesive sheet. Results: shown in Table 1. [Measurement of Adhesiveness] Measurement Jig A jig having the shape shown in FIG. 1 was cut out from a polyethylene resin rod with a lathe. The size of the measurement surface was a disk having a diameter of 10 mm and a thickness of 5 mm, and the surface was polished smoothly. A 6 mmφ cylinder was made on the disk, and a 2 mm diameter hole was drilled. Measurement method Place the above jig on a urethane adhesive sheet and weigh 10
Place a 0 g weight. After standing for 30 seconds, the weight is removed, the jig is pulled up, and the strength at the time of peeling is measured. For the measurement, a push bull gauge capable of recording a peak value was used (Aiko Engineering Co., Ltd., Mod
el9520; measurement range: 0 to 20 kg). The measurement was performed five times per sample, and the average value was obtained. Results: The results are shown in Table 1.

[0015]

[Table 1] As the adhesiveness of the pressure-sensitive adhesive sheet increases, the mite spreads slowly, and the catch rate improves. Ticks actively spread on non-sticky sheets, but 500g / c on sticky sheets.
In the adhesive of greater than m ^2, diffusion of mites extremely slow 8
About 5% of mites could be captured on the adhesive sheet.

Example 1 A flexible polyurethane foam having a density of 30 kg / m ³ was added to 10
The sheet was cut into a mat of × 300 × 300 mm, and 20 g of a polyurethane-based pressure-sensitive adhesive resin was sprayed on the front and back sides.
The composition of the pressure-sensitive adhesive is Hyprene P-302 (manufactured by Mitsui Chemicals, Inc.) as the main component (terminal isocyanate group-containing compound).
To 100 parts by weight (hereinafter simply referred to as "parts") of polypropylene diol having a molecular weight of 3000 (Diol-300).
0), 0.05 parts of P-25 (25% DOP (dioctyl phthalate) solution of lead octylate)) as a curing catalyst, and 23 parts of methylene chloride. Then, after being compressed by a squeezing roller to allow the adhesive to penetrate the entire foam, the adhesive was cured at 60 ° C. for 2 hours and at room temperature for one week, and the adhesive was coated on the surface of the foam forming material. At this time, the adhesiveness of the mat is 1500 g / cm.
^{Was 2} . Dermatophagoides pteronyssinus was removed from the culture medium at one point of the sample, and about one hundred microspatters were released, and the behavior was observed with a 50-fold stereoscopic microscope. As a result, the house dust mite, Dermatophagoides farina, which tries to get into the foam bubbles, begins to stick to the pressure-sensitive adhesive resin attached to the bubbles,
After 3 hours, most of the ticks have been trapped in parts of the body, after 8 hours they have become completely immobilized, after 24 hours almost 95% or more have been caught, and after that 1
00% were observed dead. The corpse also remained trapped. The mat was covered with a fabric to prepare a cushion, which was used. As a result, the cushioning property was maintained and the usability was good. After 48 hours, the mat was washed by hand-rubbing with a neutral detergent, air-dried, and observed again with a microscope. As a result, Dermatophagoides pteronyssinus was observed and removed. The adhesiveness after air drying also returned to the initial state.

Example 2 An acrylic emulsion-based adhesive (Esdine # 7110, manufactured by Sekisui Chemical Co., Ltd., trade name: Esdine # 7110, solid content 50%) was applied to 2,000 × 1000 × 3 mm synthetic fiber felt made of cotton and synthetic fiber with water to 39%. Using the diluted solution, the synthetic fiber felt was impregnated. Then squeeze twice with a roll, at 60 ° C for 3 hours
Further, the mixture was cured at normal temperature for one week, and the resin liquid was attached to the fiber surface. There were many openings on the felt surface, and no film-like coating was formed on the surface. At this time, the adhesiveness was 4000 g / cm ² , and a mite capture experiment was performed as in Example 1. In the present example, a large house dust mite was used as a specimen. As a result, similar to the first embodiment,
After 24 hours, 95% or more of them were captured and died. It has been confirmed that this sheet is suitable for use in which it is used by covering a surface cloth, is used for capturing various mites which require a high degree of adhesion, and is discarded after being used for a certain period of time.

Example 3 A soft urethane foam cut into a size of 2000 × 1000 × 300 mm was coated with P-302 as a urethane-based pressure-sensitive adhesive.
(100 parts), Diol-3000 (125 parts), P-
A liquid obtained by mixing 25 (0.05 parts) with methylene chloride (22 parts) was mixed with an air spray device manufactured by Iwata Coating Machine Co., Ltd. for 200 times.
g / cm ² were sprayed on both sides. Then, compressed air was blown to the surface, and processing was performed so that the adhesive shavings did not penetrate into the foam and a film-like film was not formed on the surface. Curing was carried out at 600 ° C. for 2 hours and further at room temperature for 1 week. The pressure-sensitive adhesive penetrated about 5 mm inside from the surface, and the space was sufficiently secured. Adhesion at this time is 4000 g / cm
^{Was 2} . When the same mite capture test as in Example 2 was performed, 95% or more were captured 24 hours later, and death was confirmed. After putting the sheets on this mat and making the bed,
Because the inside is conventional urethane foam, the cushioning property is good, and it also has mite removal and washing resistance,
It was the best thing as a health bet.

Example 4 200 g / silicone pressure-sensitive adhesive resin was used for the inner straw of a tatami mat.
m ^{2 was} applied and cured at room temperature. Adhesion degree is 600g / c
m ² . Next, a tatami mat was put on the tatami mat, and the tatami mat was used for two months. After the tatami mat was used, the tatami mat was peeled off and the inside was observed.

Example 5 Bifunctional polytetramethylene ether glycol having a molecular weight of 1000 and pure MDI (diphenylmethane diisocyanate) in a dimethylformamide solvent as a flexible urethane foam used in Example 1 and a urethane resin pressure-sensitive adhesive. Is polymerized, and the molecular weight of the terminal hydroxyl group is about 5
A 0000 solution was used. After the pressure-sensitive adhesive solution was applied on the foam, the mixture was compressed with a press to remove excess adhesive, immediately after removing the solvent in water, dried at 70 ° C. for 2 hours, and further dried at room temperature for 1 week. Adhesion at this time is 2
000 g / cm ² . When the mite capture test was performed in the same manner as in Example 1, 95% or more were captured after 24 hours.

COMPARATIVE EXAMPLE 1 The same flexible polyurethane foam as in Example 1 was combined with a urethane-made pressure-sensitive adhesive of poly (propylene) triol having a molecular weight of 5,000 (Triol-5000; trifunctional).
It was the same as Example 1 except that 20 parts were used. At this time, since the terminal of the resin is not a hydroxyl group, the adhesiveness is low and 100 g / cm.
^{Was 2} . The result of the tick capture test was that only two mites were captured.

Comparative Example 2 Example 1 was the same as Example 1 except that 140 parts of Diol-3000 was used as the urethane-made pressure-sensitive adhesive on the same flexible polyurethane foam as in Example 1. At this time, the adhesiveness was high, and was 10,000 g / cm ² . The result of the mite capture test was 100% captured, but when sitting on this foam, there was no cushioning and the adhesiveness was too strong to restore.
It remained concave.

[0023]

As described above, there have been published many research results indicating that ticks cause atby dermatitis, Zensoku, etc., and the occurrence of ticks has increased rapidly with the degree of sealing of houses. The present invention, for example, is not intended to prevent mites or kill mites using acaricides, etc., but captures inhabiting mites in mats and takes a completely new viewpoint of causing death as it is. It is an invention. Especially, it is applied to futons, beds, sofas, carpets, tatami mats, etc. that are suitable for mites, and aims to eradicate 100 million mites that are said to be in the home. It is also expected to be effective for patients with mite-type atby dermatitis and Zensoku patients caused by inhaling their dead bodies.

[Brief description of the drawings]

FIG. 1 is a side view of a measuring jig used for measuring the adhesiveness of an adhesive used in the present invention.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yosuke Daimon 3-23-31 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture Inside Mitsui Chemicals Inc. (72) Inventor Keisuke Fukuda 3-5-2 Kasumigaseki, Chiyoda-ku, Tokyo Mitsui Chemicals, Inc.

Claims (4)

[Claims] 1. A film-like film is formed on the surface of a substrate by impregnating, spraying or roll-coating a substrate having open cells and / or communicating spaces with a pressure-sensitive adhesive resin while air bubbles or voids are present. A mite capture mat characterized in that it is provided so as not to produce a mite. 2. The mite capture mat according to claim 1, wherein the substrate having the cell size and / or the communication space is a substrate having an opening degree of 0.05 mm or more. 3. The pressure-sensitive adhesive resin weighs 500 to 5000 kg.
^3. The mite capture mat according to claim 1, wherein the mat has a tackiness in the range of / cm ² . 4. The mite catch mat according to claim 1, wherein the substrate having open cells is a flexible urethane foam, and the pressure-sensitive adhesive resin is a urethane-made pressure-sensitive adhesive resin.