JPH1099421A - Planar deodorizing body and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planar deordorizing body and manufacture thereof which has a wide range of use, a sheet form, and an immediate effect on the deodorizing effect and excellent in its appearance and handling. SOLUTION: A planar deodorizing body is a laminated structure in which the space between at least two sheets is joinedly integrated by a hot-melt agent mixed with activated carbon particles, and at least one of the sheets is a nonwoven cloth having an air permeability of 20 seconds or less and an average fiber distance of 1 to 100μm, and also the grain diameter of the activated carbon particle is 100 to 1000μm, and the grain diameter of the hot-melt agent particle is 100 to 1000μm, and the melt index of the hot-melt agent is 0.1 to 30. The planar deodorizing body is manufactured in such a way that, after the mixed particles of the activated carbon particles and the hot-melt agent particles are shaken down on a sheet so as to be spread by using a spreader, the other sheet is overlaid on the sheet and hot-pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar deodorant, and more particularly, to a high-efficiency planar deodorant and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, interest in odors in living spaces, clothing, and daily necessities has been increasing with the improvement in the living standards of general consumers. Conventionally, various sheets for the purpose of deodorization have been proposed. Deodorizing functional agents immobilized on textiles can be classified according to their deodorizing mechanisms: (1) sensory deodorizing mechanism, (2) chemical deodorizing mechanism, (3) physical adsorption and deodorizing mechanism, (4) physical chemistry It is roughly divided into a deodorizing mechanism. (1) The sensory deodorant mechanism
An aromatic type, a masking type, a neutralizing type, and the like are known, and all use an aromatic agent such as citral, benzyl acetate, turpentine oil, or the like to make it difficult to feel a bad smell. Although this mechanism is very quick-acting, it does not eliminate the odor, some odor including the fragrance remains, and its use is limited at present. As the chemical deodorization mechanism (2), an oxidation-reduction method, an addition condensation method, and the like are known, and an acrylic acid compound, a phenol compound, a manganese sulfate L ascorbic acid compound, an imine compound, or the like is used. This mechanism utilizes a chemical reaction, in which these substances and a malodorous substance cause a chemical reaction and change or combine with an odorless substance to eliminate the malodor.
However, since acidic deodorants are effective against alkaline odors, the odors that can be deodorized by the deodorant are limited, so the daily life of "refrigerator odor" and "pet odor" There is a problem in that the complex odor has a low effect, has no immediate effect, and requires an extremely long time until the effect is developed.

[0003] The physical adsorption and deodorization mechanism of (3) includes activated carbon,
A porous body such as dry clay bamboo obtained by carbonizing activated clay, ceramics, zeolite, and bamboo powder is used, and a physical adsorption mechanism on the surface of the porous body is used. These have an effect on a wide range of odors as compared with the chemical deodorizing mechanism (Japanese Utility Model Publication No. 6-34105, Japanese Unexamined Patent Publication No. Hei 6-73665).
Japanese Patent Application Laid-Open No. H11-157, and also has a very high immediate effect.
However, since the porous body is a solid particle having a shape of several tens of μm to 10 mm, it is often used in a bag having air permeability. Therefore, it has a bulky shape and is limited to applications that do not require a design such as a refrigerator and a locker in a space in daily life. In addition, the solid particles packed in the bag exist in a lump, and the particles other than the particles on the surface of the lump are inefficient because they do not have a chance to come in contact with the malodorous molecules. Is impaired.

[0004] Further, as a method of immobilizing on a sheet-like material, after mixing the physical adsorbent and a binder in a solution state,
Processing methods of coating or impregnating on paper or non-woven fabric are known, but this method has a problem that the deodorizing function is significantly reduced because the binder covers most of the surface of the physical adsorbent. is there. As a method of fixing the activated carbon to a sheet without covering the surface with a binder, a method of embossing bonding between two thermoplastic sheets with deodorizing functional particles such as activated carbon sandwiched between them has been proposed (Japanese Patent Laid-Open No. Hei 8-
No. 72194). However, in this method, the deodorizing function powder is not actually fixed to the sheet, but merely held while being sandwiched between the sheets, and is deodorized at the time of secondary processing such as cutting and sewing. There is a problem that the functional powder falls off and the processability is extremely poor, and the range of application is extremely limited.

[0005] Further, there is a method in which an adhesive resin layer is provided on one of two sheets and the deodorizing function powder is fixed between the sheets in order to minimize the surface of the deodorizing function powder with a binder resin. It has been proposed (Jpn.
issue). In this method, the amount of the deodorant functional powder is increased in order to reduce the covering area between the functional powder surface and the adhesive resin layer, or the larger the powder particle size, the more the distance between the two sheets is increased. Since the bonding area is significantly reduced, the durability of the sheet itself and the secondary workability are inferior. Conversely, if the amount of deodorant functional powder is reduced or the particle size of the powder is reduced to increase the bonding strength, the surface of the functional powder is more likely to be covered with the adhesive resin layer. In addition, since the adhesive resin layer has no air permeability, it cannot be used in fields requiring air permeability such as filter materials. In addition, some of the conventionally used air-permeable sheets use paper or perforated film.However, in applications such as immersion in water or condensation, mechanical strength such as tearing strength is used. There is a problem that the reduction is remarkable and the application is limited.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to have a wide range of applications, a sheet shape, and a sheet shape excellent in immediate effect of deodorizing effect, appearance and handleability. An object of the present invention is to provide a deodorant and a method for producing the same.

[0007]

Means for Solving the Problems The present inventors have focused on the physical adsorption and deodorizing mechanism having high immediate effect among the above-mentioned deodorizing mechanisms, and have conducted intensive studies on the form of immobilization. By specifying the air permeability of the sheet, the particle size of the activated carbon powder and the hot melt agent powder, etc., the surface area of the physical adsorption functional agent is hardly impaired, extremely high immediate effect is exhibited, and the appearance and handleability are improved. It has been found that an excellent planar deodorant can be obtained, and the present invention has been accomplished.

The invention claimed in the present invention is as follows. (1) A laminated structure in which at least two sheets are joined and integrated with a hot melt agent mixed with activated carbon powder, wherein at least one of the sheets has an air permeability of 20 seconds or less and an average fiber distance of 1 to 1. 100 μm non-woven fabric, wherein the particle size of the activated carbon powder is 100 to 1000 μm, the particle size of the hot melt agent powder is 100 to 1000 μm, and the melt index of the hot melt agent is 0.1 to 30. Planar deodorant. (2) The planar deodorant according to (1), wherein the nonwoven fabric is a synthetic long-fiber nonwoven fabric. (3) The activated carbon powder is a mixed activated carbon powder in which an impregnated activated carbon carrying an acidic substance and an impregnated activated carbon are mixed at a weight ratio (impregnated activated carbon: non-impregnated activated carbon) of 1:99 to 70:30. The planar deodorant of (1) or (2). (4) The mixed powder obtained by mixing the activated carbon powder and the hot melt agent powder is sprinkled, sprayed on a sheet using a sprayer, and then another sheet is stacked and hot-pressed.
(1) A method for producing a planar deodorant body.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the planar deodorant of the present invention, a nonwoven fabric having a specified air permeability and an average inter-fiber distance is used for at least one of the sheets. The air permeability of the planar deodorant can be adjusted as appropriate,
In addition, the effect of the activated carbon powder can be maximized. Further, in the planar deodorant of the present invention, since the particle size of the activated carbon powder, the particle size of the hot melt agent and the melt index (hereinafter, simply referred to as MI value) are specified, the activated carbon powder exists between the sheets. Activated carbon powder can be held uniformly in a planar shape without causing the surface, and the surface of the activated carbon powder is hardly covered by the binder resin for fixing to the sheet. Can be expressed very effectively.

As the sheet used in the present invention, a resin film or resin sheet such as polyethylene, polypropylene, polyethylene terephthalate, or a knitted fabric,
A fibrous sheet such as a woven fabric or a nonwoven fabric, and a composite sheet composed of such a fibrous sheet and a resin film or a resin sheet can be used. The fiber material of the fibrous sheet is not particularly limited, and natural fibers such as cotton, wool, hemp, pulp, semi-synthetic fibers such as rayon, and synthetic fibers such as polyethylene, polypropylene, nylon, polyethylene terephthalate, and polyvinyl alcohol are used. Can be When using non-woven fabric, spunbond method, spunlace method, card needle punch method, resin bonding method,
It may be manufactured by any method such as a flash spinning method and a melt blow method.

In the present invention, a nonwoven fabric is used for at least one sheet, and its air permeability by the Gurley method is 2
0 second or less, preferably in the range of 0.3 to 5 seconds, the average inter-fiber distance is 1 to 100 μm, preferably 30 to 60 μm
m. If the air permeability exceeds 20 seconds, the speed at which the odorous gas passes through the sheet becomes higher than the adsorption speed of the activated carbon, and as a result, the immediate effect of the deodorizing effect is impaired. When the average fiber-to-fiber distance exceeds 100 μm, when a strong force such as rubbing is applied to the sheet, the activated carbon or the hot melt agent that has fallen from the hot melt agent may leak through the sheet. On the other hand, if it is less than 1 μm, leakage of the activated carbon or hot melt agent can be prevented, but it is difficult to reduce the air permeability to 20 seconds or less. The fibrous material used for the nonwoven fabric is not particularly limited, and the above-mentioned fibrous sheet can be used. Among them, the synthetic long-fiber nonwoven fabric by the spun bond method has high air permeability and high strength even at a low basis weight. It is expressed, and the planar deodorant can be lightened, and the range of application is very wide, which is preferable.

The activated carbon used in the present invention includes porous powder obtained by firing coconut shell, tar, resin and the like. The particle size of this active powder is 100 to 10
Those having a size of 00 μm, preferably 250 to 500 μm are used. When the particle size exceeds 1000 μm, the unevenness becomes remarkable and the appearance of the sheet is impaired.
Subsequent processing becomes extremely difficult. On the other hand, if it is less than 100 μm, the activated carbon tends to fly in the air, and it becomes extremely difficult to process it into a deodorant.

For the purpose of improving the performance of adsorbing a special malodor on activated carbon powder having such a particle size, a material carrying the above-mentioned chemical deodorant functional material or a mixture of two or more of these materials is used. Is also good. Above all, the unsupported activated carbon powder (impregnated activated carbon) and the activated carbon powder (impregnated activated carbon) loaded with an acidic substance such as a sulfanilic acid compound, an acrylic acid compound, or polyphenol in a weight ratio (impregnated activated carbon: unimpregnated activated carbon) of 1 : 99-70: 50 is preferred because the activated carbon mixed at a ratio of 99:70:50 can provide a high deodorizing effect even on the ammonia odor which is considered to be slightly weak by non-supported activated carbon. If the mixing ratio of the acidic substance-carrying activated carbon is less than 1 by weight, the deodorizing effect on the ammonia odor is reduced with the amount of activated carbon in the present invention, and if it exceeds 70, the deodorizing performance of acidic odors such as acetic acid may be reduced. is there. A more preferred mixing ratio is from 5:95 to 50:50.

In the present invention, the amount of the active substance powder used is
From the viewpoint of handling property and workability, such as easiness of bending of the deodorizing performance and deodorizing sheet, is preferably in the range of 10 to 150 g / m ^2, more preferably in the range of 15~75g / m ² . Examples of the hot melt agent used in the present invention include EVA type, EEA type, LDPE type, polyester type, nylon type and other powdery hot melt agents usually used for processing an adhesive interlining. The particle size of the hot melt powder is 100 to 1000 μm, preferably 2 to 1000 μm.
MI is 50 to 500 μm and indicates viscosity at the time of melting.
The value is 0.1-30, preferably 1-20. If the particle size of the hot melt agent is less than 100 μm, the hot melt agent will easily fly in the air, making it difficult to process into a deodorant. On the other hand, when the thickness exceeds 1000 μm, secondary workability is remarkably impaired, for example, needle breakage occurs at the time of sewing the sheet material.

In particular, the use of a powdered hot melt having the same particle diameter as that of the activated carbon as the main functional agent applies a uniform pressure to all of the powdered hot melt and the activated carbon powder during hot press bonding. Activated powder can be bonded to the sheet only at the point of contact between the sheet and the activated carbon powder, with almost no change in shape, and it has excellent immediate deodorizing performance and is smooth and soft in appearance. It is preferable because a deodorant can be obtained. When the MI value is less than 0.1, the fluidity at the time of melting is too small, so that the adhesion between the sheets becomes weak.
On the other hand, when the MI value exceeds 30, the molten powdery hot melt agent is sucked into the sheet-like material, causing spots such as spots on the appearance, or clinging to the activated carbon surface, resulting in markedly impairing the deodorizing performance. The amount of the powdered hot melt used is preferably 10 to ²⁰⁰ g / m ² .

The planar deodorant of the present invention can be produced, for example, as follows. First, a mixed powder of activated carbon powder and a powdered hot melt agent is mixed using a commonly used powder mixer such as a homomixer or a rotary mixer, and the mixed powder is used, for example, when producing an adhesive interlining. Spread evenly on the sheet using a powder shaker used for, etc., layer another sheet on this, and then hot press,
The hot melt is softened or fused to adhere and integrate. If necessary, two or more air permeable sheets may be used, or the mixed powder may be distributed between the air permeable sheets and hot pressed.

[0017]

The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the invention thereto. In addition,
The air permeability, average inter-fiber distance and deodorant performance in the examples were measured as follows. (1) Air permeability was measured according to the JISL-1096 Gurley method. (2) The average inter-fiber distance is calculated by the following equation. <In the case of one type of fiber thickness> Average distance between fibers = 100000 (Atd / 9000W)
^1/2, where A: area of the nonwoven fabric (m ² ) t: thickness of the nonwoven fabric (m) d: fineness (denier) <when the thickness of the fiber is N types>

(Equation 1) Here, di: the fineness of the i-th type fiber (denier) fi: the mixing ratio (%) of the i-th type fiber

When the fiber diameter was not clear, the fiber diameter was measured with a scanning microscope, converted into denier according to the following equation, and then the average inter-fiber distance was calculated. In the measurement of the weight and thickness, a sample of 20 × 20 cm ² was used, the weight was measured, and then the thickness under a load of 10 g / m ² of contact pressure was measured. D = 11.9 (d / ρ) ^1/2 where D: fiber diameter (μm) d: fineness (denier) ρ: specific gravity

(3) Evaluation of Deodorizing Performance <Evaluation of Immediate Effect of Deodorizing Performance> A planar deodorant is cut out to 5 × 10 cm. Sample and 20pp in 1000cc Tedlar bag
600 cc of acetaldehyde gas adjusted to m is sealed and left in an environment of 20 ° C. After 5, 10, 20, 30, 60, and 120 minutes, the concentration of the odor gas in the Tedlar bag is measured with a detector tube, and the odor gas residual ratio is calculated by the following equation.

(Equation 2)

<Evaluation of Deodorizing Performance for Various Offensive Odor Components> A planar deodorant is cut out to 5 × 10 cm. A sample in a 1000 cc Tedlar bag and 600 cc of a malodorous gas (hydrogen sulfide, trimethylamine, ammonia) adjusted to the following concentration are sealed and left in an environment of 20 ° C. Hydrogen sulfide 20 ppm Trimethylamine 20 ppm Ammonia 100 ppm After 60 minutes, the odor gas concentration in the Tedlar bag is measured with a detector tube, and the odor gas residual ratio is calculated by the following equation.

(Equation 3)

The following Examples 1 to 3 and Comparative Examples 1 to
Table 1 summarizes properties such as air permeability of the sheet used in No. 6. Table 2 summarizes the measurement results of the residual gas concentration of the obtained planar deodorant, and the like.

[Table 1]

[0022]

[Table 2]

Example 1 Polyethylene terephthalate is melt-spun and drawn from a spinneret by air soccer to produce a uniform long fiber web, which is uniformly embossed with convex portions and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm and EVA powder hot melt agent having a melting point of 83 ° C. and a melt index of 2.5, fractionated to a particle size of 250 to 500 μm, were added in a weight ratio of 1: 2. The resulting mixture was mixed with a rotary powder mixer to obtain a mixed powder of activated carbon powder and hot melt agent powder. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent were applied onto the previously prepared long-fiber nonwoven fabric (sheet A). The powder was sprayed so that the total amount of the powder became 60 g / m ² . Furthermore, the same long-fiber nonwoven fabric (sheet B) was overlaid and joined with a hot press roll heated to 150 ° C. to obtain a planar deodorant. The obtained sheet-like deodorant had a remarkably high deodorant performance immediate effect, and was deodorized after 10 minutes to a residual ratio of acetaldehyde gas of 4%. In addition, hydrogen sulfide and trimethylamine also had a gas remaining rate of 0%, confirming a high effect.

Comparative Example 1 Polyethylene terephthalate was melt-spun and drawn from the spinneret by air soccer to produce a uniform long-fiber web, which was uniformly arranged on an embossing roll having convex portions and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, the coconut shell activated carbon powder fractionated to a particle size of 500 to 3000 μm and the EVA-based powder hot melt agent having a melting point of 83 ° C. and a melt index of 2.5 fractioned to a particle size of 250 to 500 μm were added in a weight ratio of 2: 1. The resulting mixture was mixed with a rotary powder mixer to obtain a mixed powder of activated carbon powder and hot melt agent powder. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent are applied onto the previously prepared long-fiber nonwoven fabric (sheet A). The powder was sprayed so that the total amount of the powder became 60 g / m ² . Furthermore,
The same long-fiber nonwoven fabric (sheet B) was overlaid and joined by a hot press roll heated to 150 ° C. to obtain a planar deodorant. The deodorizing performance of this planar deodorant body, including the immediate effect, was confirmed to be as high as in Example 1. However, the appearance and roughness were extremely poor and the smoothness was poor. Occasionally, the cutting blades and needles had large impact and abrasion was remarkably inferior in practical use.

Example 2 Polyethylene terephthalate was melt-spun and drawn from the spinneret by air soccer to produce a uniform long fiber web, which was uniformly embossed with convex portions and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, the coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm and the LDPE powder hot melt agent fractionated to a particle size of 250 to 500 μm having a melting point of 130 ° C. and a melt index of 25 are brought to a weight ratio of 2: 1. Was mixed with a rotary powder mixer to obtain a mixed powder of activated carbon powder and hot melt agent powder. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent are applied onto the previously prepared long-fiber nonwoven fabric (sheet A). The powder was sprayed so that the total amount of the powder became 60 g / m ² . Furthermore,
The same long-fiber nonwoven fabric (sheet B) was overlaid and joined with a hot press roll heated to 200 ° C. to obtain a planar deodorant. The deodorant performance of the obtained planar deodorant is high,
After a minute, the residual acetaldehyde gas was deodorized to 15%, and after 30 minutes to 5%. Hydrogen sulfide and trimethylamine also had a gas remaining rate of 0%, confirming a high effect.

Comparative Example 2 Polyethylene terephthalate was melt-spun and drawn from the spinneret by air soccer to produce a uniform long fiber web, which was uniformly embossed on the embossing roll having convex portions and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, the coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm and the EEA powder hot melt agent having a melting point of 86 ° C. and a melt index of 250, fractionated to a particle size of 250 to 800 μm, are in a weight ratio of 2: 1. Was mixed with a rotary powder mixer to obtain a mixed powder of activated carbon powder and hot melt agent powder. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent are applied onto the previously prepared long-fiber nonwoven fabric (sheet A). The powder was sprayed so that the total amount of the powder became 60 g / m ² . Furthermore, the same long-fiber nonwoven fabric (sheet B) was overlaid and joined with a hot press roll heated to 150 ° C. to obtain a planar deodorant. The deodorant performance of the obtained planar deodorant body is low,
Minutes later, the residual ratio of acetaldehyde gas was 60%,
It was 20% even after 0 minutes. Hydrogen sulfide and trimethylamine have gas residual rates of 10% and 5%, respectively.
It can be seen that the deodorizing effect of the activated carbon is inhibited as compared with the examples.

Example 3 Polyethylene terephthalate is melt-spun and drawn from the spinneret by air soccer to produce a uniform long-fiber web, which is uniformly embossed with convex portions and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, the coconut shell activated carbon powder fractionated to a particle size of 250-500 μm and the EVA-based powder hot melt agent having a melting point of 83 ° C. and a melt index of 2.5, fractionated at a particle size of 250-500 μm, were added in a weight ratio of 2: 1. The resulting mixture was mixed with a rotary powder mixer to obtain a mixed powder of activated carbon powder and hot melt agent powder. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent are applied onto the previously prepared long-fiber nonwoven fabric (sheet A). The powder was sprayed so that the total amount of the powder became 60 g / m ² . Further, a PP film (sheet B) having an air permeability of 300 seconds or more (no air permeability) is overlaid and joined with a hot press roll heated to 130 ° C. from the long fiber nonwoven fabric side to obtain a planar deodorant. Was. The obtained sheet-like deodorant had a remarkably high deodorant performance immediate effect, and was deodorized after 10 minutes to a residual ratio of acetaldehyde gas of 4%. Hydrogen sulfide and trimethylamine also had a gas remaining rate of 0%, confirming a high effect.

Example 4 Polyethylene terephthalate is melt-spun and drawn from the spinneret by air soccer to produce a uniform long fiber web, which is uniformly embossed with convex portions and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, coconut shell activated carbon powder fractionated to a viscosity of 250 to 500 μm, activated carbon powder in which 5% by weight of sulfanilic acid is supported on activated carbon powder,
EVA powder hot melt agent having a melting point of 83 ° C. and a melt index of 2.5, fractionated to 分 500 μm, was mixed with a rotary powder mixer at a weight ratio of 1: 1: 4, and activated carbon powder was mixed. Thus, a mixed powder of the hot melt agent powder was obtained. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent are applied onto the previously prepared long-fiber nonwoven fabric (sheet A). The powder was sprayed so that the total amount of the powder became 60 g / m ² . Furthermore, the same long-fiber nonwoven fabric (sheet B) was overlaid and joined with a hot press roll heated to 150 ° C. to obtain a planar deodorant. The obtained sheet-like deodorant had a remarkably high deodorizing performance immediate effect, and was deodorized after 10 minutes to a residual acetaldehyde gas rate of 8%. Hydrogen sulfide, trimethylamine, and ammonia also have a gas residual rate of 0%.
High effect was confirmed.

Comparative Example 3 A polyethylene polymer and a solvent were discharged from a high-temperature high-pressure condition to a low-temperature low-pressure region from a nozzle, and the solvent was flushed.
After the fibrillated reticulated fiber is formed, the fibril
Thermocompression bonding with a calender roll at 0 ° C.
g / m ² of polyethylene nonwoven fabric was obtained. The air permeability of the obtained sheet was 50 seconds, and the average inter-fiber distance was 0.7 μm. Next, coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm and EV having a melting point of 83 ° C. and a melt index of 2.5 fractionated to a particle size of 250 to 500 μm.
The A-type powder hot melt was mixed with a rotary powder mixer at a weight ratio of 2: 1 to obtain a mixed powder of activated carbon powder and hot melt agent powder. Next, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth, activated carbon powder and hot melt agent powder were placed on the previously prepared polyethylene nonwoven fabric (sheet A). Was sprayed so that the total amount became 60 g / m ² . Furthermore,
The same polyethylene non-woven fabric (sheet B) is overlaid and 120
Joining was carried out by a hot press roll heated to a temperature of ° C. to obtain a planar deodorant. The deodorant performance of the obtained planar deodorant was low, and the acetaldehyde gas remaining rate was 30% after 30 minutes.

Comparative Example 4 Coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm and melting point 83 fractionated to a particle size of 250 to 500 μm
C., an EVA powder hot melt having a melt index of 2.5 was mixed with a rotary powder mixer at a weight ratio of 2: 1 to obtain a mixed powder of activated carbon powder and hot melt agent powder. . Next, a PP film (sheet A) having an air permeability of 300 seconds or more (no air permeability) using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth. It was sprayed on the powder so that the total of the activated carbon powder and the hot melt powder was 60 g / m ² . Further, the same PP film (sheet B) is stacked and
Bonding was performed by a hot press roll heated to 30 ° C. to obtain a planar deodorant. Since the sheet used had no air permeability, the sheet deodorant had no deodorizing performance.

Comparative Example 5 Polyethylene terephthalate was melt-spun and pulled from the spinneret by air soccer to produce a uniform long fiber web, which was uniformly embossed with a convex portion and a lower surface having a smooth surface. Thermocompression bonding between rolls, fineness 2
d, a long-fiber nonwoven fabric having a basis weight of 30 g / m ² was obtained. The air permeability of the obtained sheet is 0.3 seconds, and the average inter-fiber distance is 47 μm.
Met. Next, activated carbon: acrylic resin aqueous solution = 3: coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm was added to an aqueous acrylic resin solution diluted at a solid content of 5%.
The resulting mixture was applied to the above-mentioned sheet (sheet A) with a comma roll coater so that the applied amount of the solid was 60 g / m ^2, and dried to obtain a planar deodorant. The instant deodorizing performance of this planar deodorant was remarkably poor, and the gas residual ratio was 70% after 10 minutes. In addition, the residual gas rates of hydrogen sulfide and trimethylamine were 20% and 1%, respectively.
0%, indicating that the performance of the activated carbon was significantly impaired as compared with the examples. This is probably because the acrylic resin binder covers most of the activated carbon surface.

Comparative Example 6 Coconut shell activated carbon powder fractionated to a particle size of 250 to 500 μm and melting point 83 fractionated to a particle size of 250 to 500 μm
C., an EVA powder hot melt having a melt index of 2.5 was mixed with a rotary powder mixer at a weight ratio of 2: 1 to obtain a mixed powder of activated carbon powder and hot melt agent powder. . Next, on a Kent paper (sheet A) having a basis weight of 20 g / m ² and an air permeability of 10 seconds, using a hot roll bonding type laminating apparatus equipped with a powder dispersing apparatus usually used for laminating paper or cloth. The powder was sprayed so that the total of activated carbon powder and hot melt agent powder became 60 g / m ² . Further, the same Kent paper (sheet B) was overlaid and joined with a hot press roll heated to 130 ° C. to obtain a planar deodorant. Although the deodorant performance and immediate effect of this planar deodorant are high,
Due to the high rigidity of the paper, the appearance was very uneven and the smoothness was poor.

[0033]

The planar deodorant of the present invention has a very high effect of removing the offensive odor and is excellent in appearance, handleability and secondary workability. Further, according to the production method of the present invention, a planar deodorant having the above effects can be obtained efficiently.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 27/12 B32B 27/12 27/18 27/18 F 31/20 31/20

Claims (4)

[Claims] 1. A laminated structure in which at least two sheets are joined and integrated with a hot melt agent mixed with activated carbon powder, wherein at least one of the sheets has an air permeability of 20 seconds or less and an average inter-fiber distance. 1 to 100 μm nonwoven fabric, and the particle size of the activated carbon powder is 100 to 1000 μm
m, the particle size of the hot melt agent powder is 100 to 1000 μm
And the hot melt agent has a melt index of 0.1
A planar deodorant body having a size of from 30 to 30. 2. The planar deodorant according to claim 1, wherein the nonwoven fabric is a synthetic long-fiber nonwoven fabric. 3. A mixed activated carbon powder in which the activated carbon powder is a mixture of impregnated activated carbon carrying an acidic substance and non-impregnated activated carbon in a weight ratio (impregnated activated carbon: non-impregnated activated carbon) of 1:99 to 70:30. The planar deodorant according to claim 1 or 2, wherein 4. A mixed powder obtained by mixing activated carbon powder and hot melt agent powder, is sprayed on a sheet by using a disperser, and then another sheet is stacked and hot-pressed. 2. The method for producing a planar deodorant according to item 1.