JPH1146965A - Carpet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently absorb and remove odor components diffusing in a room, such as formaldehyde, by making an absorbent to absorb at least aldehydes be carried on a carpet main body. SOLUTION: On the surface 2a of a substrate part 2 comprising cloth made of polypropylene, a tuft pile part 3 comprising chemical fiber is planted, nonwoven fabric 5b is adhered by an adhesive 5a of styrene-butadiene rubber emulsion onto the back side 2b of the substrate part 2 to form this carpet main body 1. In that case, at least an absorbent capable of absorbing aldehydes is mixed in. As the absorbent, a chemical absorbent to absorb and combine with aldehydes into the molecule such as a hydrazide compound, etc., is used and, preferably, a hydrazide compound is used in the viewpoint of absorption ability such as absorption rate and absorption quantity, and an adipic acid dihydrazide compound is preferably used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carpet laid on a floor or the like.

[0002]

2. Description of the Related Art Conventionally, carpets of various structures such as a structure in which a pile is formed, such as a tufted carpet, and a structure in which a pile is not formed, such as a needle punch carpet, are known. The fibers used are not limited to natural fibers such as wool, and various types of chemical fibers such as acrylic fibers are used.In terms of room decoration, heat insulation, floor protection, etc. Common.

In recent years, plywood has been mostly used on floors on which carpets are laid, and formaldehyde, which is vaporized from an adhesive such as urea resin used for the plywood, is dispersed in the room, and the The irritating odor gives the occupant a disgust and the substance may impair the health of the inhaler.

When a resident or visitor having a smoking habit smokes indoors, the odor of cigarettes containing acetaldehyde as a main component remains in the room for a long period of time, making it unsuitable for residents without a habit of smoking. Give pleasure. So the resident
In order to remove such an odor, frequent ventilation or masking with an aromatic agent is used.

[0005]

However, even if ventilation is performed, formaldehyde generated from the floor surface is only partially removed together with the wind after it is once dispersed in the room. You will feel the irritating odor when you inhale, and there is no effect unless the wind blows.

[0006] On the other hand, when masking is carried out with a fragrance, the irritating odor and discomfort of formaldehyde and acetaldehyde are alleviated, but since these aldehydes are not removed from the air, the occupants are not allowed to remove it. Suction is still the same. In any case, at present, odor components such as formaldehyde dispersed in a room cannot be sufficiently removed.

[0007] In view of the above-mentioned conventional problems, the present invention provides a carpet capable of efficiently removing odor components such as formaldehyde dispersed in a room and eliminating at least the smell of aldehydes such as formaldehyde from the room. That is the task.

[0008]

In order to solve the above-mentioned problems, the present inventors have found that the source of aldehydes such as formaldehyde is mainly on the floor surface, and the floor surface is often covered with carpet. Focusing on the points, the following measures were taken. That is, a carpet provided with an adsorbent for adsorbing at least aldehydes in the carpet body 1 is used. Here, aldehydes are represented by the general formula R
A compound represented by -CHO, for example, formaldehyde, acetaldehyde and the like.

In the carpet having the above structure, since the carpet body 1 is provided with an adsorbent for adsorbing at least aldehydes, if the carpet is laid on the floor,
Of course, the original purpose of carpets such as decoration and heat insulation can be achieved, and at least the odor component consisting of aldehydes such as formaldehyde generated from the floor surface and acetaldehyde generated during smoking is adsorbed by the provided adsorbent, and indoors. On the other hand, odor components already dispersed in the room are not adsorbed and are adsorbed and removed from the air.

The structure of the carpet body 1 is as follows.
Although not particularly limited, for example, both those having a pile structure and those having a felt structure are preferably employed.

The one having a pile structure includes a pile portion,
It has a base cloth part and a backing part, the base cloth part is made of a base cloth such as tufted carpet or a tightening thread such as a Wilton carpet, and the backing part is an adhesive such as styrene-butadiene rubber emulsion and a necessary adhesive. And a backing material such as a nonwoven fabric, a jute, or a foam material, which is adhered according to the conditions. On the other hand, those having a felt structure have a felt portion made of one or more layers and a backing portion made of an adhesive and a backing material, and the felt portion is manufactured by needle punching a fiber such as cotton. The adhesive and the backing material used for the backing portion are made of the same material as that used for the pile structure.

The adsorbent is not particularly limited as long as it can adsorb at least aldehydes such as formaldehyde and acetaldehyde. For example, aldehydes are contained in molecules such as hydrazide compounds, azole compounds and azine compounds. Chemical adsorbents that bind and adsorb, etc. and perlite, zeolite, silica gel, physical adsorbents such as activated carbon etc. that confine and adsorb aldehydes etc. in micropores, etc. A chemical adsorbent is preferable in consideration of the adsorption speed, the effect continuity, and the like. Among the chemical adsorbents, a hydrazide compound is preferable from the viewpoint of the adsorption ability such as the adsorption speed and the amount of adsorption.

The use of a hydrazide compound also has the advantage of adsorbing not only the aldehydes but also ketones such as acetone and methyl ethyl ketone which are often used in paints and building materials.

The hydrazide compound is not particularly limited, and may be a monohydrazide compound having one hydrazide group in the molecule, a dihydrazide compound having two hydrazide groups in the molecule, or three or more hydrazide groups in the molecule. And the like.

Specific examples of the monohydrazide compound include:
For example, a general formula R-CO-NHNH2 (a)
R represents a hydrogen atom, an alkyl group or an aryl group which may have a substituent.].

In the above general formula (A), examples of the alkyl group represented by R include a methyl group, an ethyl group and n
-C 1 to C 1 -propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl and the like
Twelve linear alkyl groups can be mentioned. Examples of the aryl group include a phenyl group, a biphenyl group, a naphthyl group and the like, and among these, a phenyl group is preferable. Further, as a substituent of the aryl group,
For example, hydroxyl group, halogen atom such as fluorine, chlorine, bromine, etc., methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, tert-butyl group, iso
A linear or branched alkyl group having 1 to 4 carbon atoms such as -butyl group.

More specifically, the hydrazide compound of the above general formula (a) includes lauric hydrazide, salicylic hydrazide, form hydrazide, acetohydrazide, propionic hydrazide, p-hydroxybenzoic hydrazide, naphthoic hydrazide, -Hydroxy-
Examples thereof include 2-naphthoic acid hydrazide.

Specific examples of the dihydrazide compound include, for example, the general formula H2NHN-X-NHNH2... (B) wherein X represents a group -CO- or a group -CO-A-CO-. A
Represents an alkylene group or an arylene group.].

In the above formula (II), examples of the alkylene group represented by A include methylene, ethylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, Examples thereof include a linear alkylene group having 1 to 12 carbon atoms such as a nonamethylene group, a decamethylene group, and an undecamethylene group. As an arylene group, for example,
Phenylene group, biphenylene group, naphthylene group, anthrylene group, phenanthrylene group and the like,
Of these, a phenylene group and a naphthylene group are preferred. Examples of the substituent of the arylene group include the same substituents as those of the above-described aryl group.

Specific examples of the dihydrazide compound represented by the above general formula (b) include, for example, oxalic acid dihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, adipic acid dihydrazide, azelaic acid dihydrazide, sebacic acid dihydrazide, dodecane diacid dihydrazide, And dibasic acid dihydrazides such as maleic acid dihydrazide, fumaric acid dihydrazide, diglycolic acid dihydrazide, tartaric acid dihydrazide, malic acid dihydrazide, isophthalic acid dihydrazide, terephthalic acid dihydrazide, dimer acid dihydrazide, and 2,6-naphthoic acid dihydrazide. Further, various dibasic acid dihydrazide compounds described in JP-B-2-4607, 2,4-dihydrazide-6-
Methylamino-sym-triazine and the like can also be used as dihydrazide.

Specific examples of the polyhydrazide compound include polyacrylic hydrazide.

Of these, dihydrazide compounds are preferred, dibasic dihydrazide is particularly preferred, and adipic acid dihydrazide having the fastest adsorption rate is provided.
Are more preferred. Also, adipic dihydrazide is water-soluble and hardly volatilizes, so that it is well dissolved and dispersed in a rubber emulsion to be described later, and hardly volatilizes after molding.
The above hydrazide compounds can be used alone or as a mixture of two or more, or can be used as a mixture with an azole compound.

As the azole compound and the azine compound, well-known 5- or 6-membered heterocyclic compounds having two or three nitrogen atoms as hetero atoms can be widely used. These heterocyclic compounds include a linear or branched alkyl group having about 1 to 4 carbon atoms, 1 or 2
An aryl group which may have at least two substituents, a hydroxyl group, an amino group, an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, a mercapto group, an ester group, a carboxyl group, a benzotriazolyl group, 1
One or more substituents such as -hydroxybenzotriazolyl group may be substituted. Here, carbon number 1-4
Examples of the linear or branched alkyl group include methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, tert-butyl and the like.

Examples of the azole compound include a diazole compound, a triazole compound and a thiadiazole compound, and a diazole compound and a triazole compound are preferably used.

Specific examples of the diazole compound include, for example, 3-methyl-5-pyrazolone, 1,3-dimethyl-
5-pyrazolone, 3-methyl-1-phenyl-5-pyrazolone, 3-phenyl-6-pyrazolone, 3-methyl-
Pyrazolone compounds such as 1- (3-sulfophenyl) -5-pyrazolone, pyrazole, 3-methylpyrazole,
1,4-dimethylpyrazole, 3,5-dimethylpyrazole, 3-5-dimethyl-1-phenylpyrazole, 3
-Aminopyrazole, 5-amino-3-methylpyrazole, 3-methylpyrazole-5-carboxylic acid, 3-methylpyrazole-5-carboxylic acid methyl ester, 3-methylpyrazole-5-carboxylic acid ethyl ester, 3,
Pyrazole compounds such as 5-methylpyrazoledicarboxylic acid and the like can be mentioned.

Specific examples of the triazole compound include, for example, 1,2,3-triazole, 1,2,4-triazole, 3-n-butyl-1,2,4-triazole,
3,5-dimethyl-1,2,4-triazole, 3,5
-Di-n-butyl-1,2,4-triazole, 3-mercapto-1,2,4-triazole, 3-amino-
1,2,4-triazole, 4-amino-1,2,4-
Triazole, 3,5-diamino-1,2,4-triazole, 5-amino-3-mercapto-1,2,4-triazole, 3-amino-5-phenyl-1,2,4-
Triazole, 3,5-diphenyl-1,2,4-triazole, 1,2,4-triazol-3-one, urazole (3,5-dioxy-1,2,4-triazole), 1,2,4 -Triazole-3-carboxylic acid, 1
-Hydroxybenzotriazole, 5-hydroxy-7
-Methyl-1H-benzotriazole, 5-methyl-1
H-benzotriazole and the like can be mentioned.

Examples of the azine compound include a diazine compound, a triazine compound and a pyridazine compound. Of these, a pyridazine compound is preferably used. Specific examples of the biridazine compound include, for example, 6-methyl-8-hydroxytriazolobiridazine, 4,5-dichloro-3-viridazine, maleic hydrazide, 6-methyl-3-viridazone, and the like.

Among these, azole compounds are preferable, and triazole compounds such as 1,2,4-triazole and 1,2,3-triazole, pyrazole compounds such as 3,5-dimethylpyrazole, and 3-methyl-5-pyrazolone. And the like are particularly preferred. The azole compound and the azine compound can be used alone or in combination of two or more.

As a means for providing the above-mentioned adsorbent in the carpet body 1, a method such as mixing, coating or sticking can be exemplified.

As a method of mixing, a pile yarn constituting a pile portion, a base fabric or a fastening yarn constituting a base fabric portion, an adhesive and a backing material constituting a backing portion, and a fiber yarn constituting a felt portion are mixed. Method.

As a method of mixing the above-mentioned pile yarn, a method of mixing an adsorbent with a raw material pellet by dry blending, a method of mixing an adsorbent at the time of melt-kneading in a spinning step, and a method of mixing an adsorbent with cotton Spinning method and the like can be mentioned. As a method of mixing with the base cloth, a method of mixing at the time of spinning or spinning of the fibers constituting the base cloth, a method of mixing an adsorbent with a resin binder, and forming a sheet-like material thereof as a base cloth, When a nonwoven fabric produced by papermaking is used as a base fabric, a method of dampening an adsorbent at the time of papermaking may be used. Examples of a method of mixing the above-mentioned tightening yarn or the fiber yarn constituting the felt portion with a method similar to the above-mentioned pile yarn during spinning or spinning of the tightening yarn include a method of mixing. The adhesive and the backing material can be mixed in a conventional manner.

As a method of coating, an adsorbent is blended with an organic solvent such as water or alcohol, a vinyl acetate-based paint, an acrylic paint, a urethane-based paint, and the like. For example, a method of applying to the front surface and / or the back surface of the cloth portion, the back surface of the backing portion, and the like can be exemplified. In the production stage, the method can be applied to a method of completing a carpet after applying the composition to each part, or a method of appropriately producing a carpet after producing the carpet by a usual method. Examples of the method of sticking include a method of sticking a member having an adsorbent to a space between piles, a base cloth, a back surface of a carpet body, or the like.

Each of the above methods can be appropriately selected according to the characteristics of the adsorbent, such as heat resistance and adsorption ability. However, when a chemical adsorbent is used as the adsorbent, the viewpoints of the adsorption ability and safety are considered. Therefore, a method in which the adsorbent is not exposed to the surface, for example, a method of mixing the adsorbent with the adhesive in the backing portion, a method of using a nonwoven fabric coated with the adsorbent as a base cloth, and the like can be preferably adopted.

When the method of mixing with the adhesive of the backing portion or the method of mixing with the foaming material used as the backing material is adopted, the portion having the adsorbent has a porous structure, and the specific surface area is increased, so that the adsorbing capacity is increased. Is preferred because it is possible to improve

The foaming material is not particularly limited. For example, thermoplastic resins such as polyethylene, polyvinyl chloride and vinyl acetate, and thermosetting resins such as polyurethane and vinyl ester can be used. , Isoprene rubber, chloroprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, acrylonitrile
A foam made of rubber such as butadiene rubber, silicone rubber, or urethane rubber may be used. When rubber is used, there is an advantage that displacement of the carpet can be prevented, and among these rubbers, styrene-butadiene rubber which is highly versatile and can be molded at a relatively low temperature is preferable.

The means for foaming is not particularly limited, and can be appropriately selected and used from known organic foaming agents and inorganic foaming agents. Carbon dioxide, freon, methylene dichloride, pentane, air Alternatively, a gas (carbon dioxide) that has reacted with water, such as polyurethane, may be foamed by directly enclosing it in a polymer. Above all, according to a two-stage foaming method in which foam is once grown by chemical foaming before mechanical foaming or gelling using gas, and then the cells are grown by heating and open cells can be obtained, a continuous foam can be obtained and deodorized. This is preferable because the performance can be improved.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a carpet according to the present invention will be described. <First Embodiment> In FIG. 1, reference numeral 1 denotes a surface 2a of a base fabric portion 2 made of a plain woven fabric (base fabric) made of polypropylene.
A tuft-shaped pile portion 3 made of chemical fiber such as an acrylic / polyester blended yarn (blend ratio: 1: 1) is planted, and a styrene-butadiene rubber (hereinafter, appropriately referred to as “SBR”) is formed on the back surface 2b of the base fabric portion 2. This shows a carpet body provided with a backing portion 5 by sticking a nonwoven fabric 5b (corresponding to a backing material) using an emulsion as an adhesive 5a.

An adsorbent capable of adsorbing at least aldehydes is mixed in the SBR emulsion (various additives such as a stabilizer are mixed if necessary). Of these, adipic dihydrazide (hereinafter abbreviated as “ADH” as appropriate) is used. The nonwoven fabric 5b has a fiber amount of about 15 to 100 g / m ² , for example.

The method for producing such a carpet is not particularly limited, but it can be produced, for example, through a known tufted step and a backing step. That is, in the tufted process, the roll-shaped base cloth portion is sent out, a pile yarn is inserted using a needle from the back side of the base cloth portion, and a loop of the pile yarn is hooked on a hook on the front side of the base cloth portion. By repeating the process of planting a loop-shaped pile portion and cutting the loop top portion of the pile portion with a knife provided opposite the hook, the tuft-shaped pile portion is planted in the base cloth portion. Is done.

In the backing step, the SB is previously set in the hopper.
R Emulsion and ADH (powder or emulsion) are added and mixed, and the SBR adjusting solution is applied to the back surface of the base fabric, a non-woven fabric is adhered thereon, and then the adhesive is dried. The carpet is manufactured through both steps.

Since the carpet having the above structure is provided with an adsorbent for adsorbing at least aldehydes, when laid on a floor, an aldehyde group such as formaldehyde generated from the floor and a hydrazide group of ADH are bonded. ,
Odorous components such as formaldehyde are quickly adsorbed and removed by the adsorbent, and can be prevented from dispersing indoors. In addition, since the odor components such as formaldehyde and acetaldehyde dispersed in the room are also adsorbed by the adsorbent, the odor components such as formaldehyde hardly disperse in the indoor air. The room is deodorized with almost no unpleasant odor caused by odor components such as formaldehyde and acetaldehyde.

Further, pile yarns are complicated on the back surface 2b of the base cloth portion 2 and SBR penetrates into the pile yarns, so that after drying, the backing portion 5 (the portion of the adhesive 5a) becomes porous, There is an advantage that the area where the mixed adsorbent comes into contact with air is increased, and a faster and larger amount of odor components such as formaldehyde can be adsorbed.

In the present embodiment, ADH which is a dihydrazide compound is used as an adsorbent excellent in adsorbing and removing aldehydes, but other adsorbents described in detail above may be used. However, among the dihydrazide compounds,
ADH is not only excellent in adsorbing aldehydes, but also water-soluble and hardly volatilized because it has four methylene groups.
There is an advantage that it can be easily mixed with the BR emulsion and hardly volatilized after molding, so that the adsorption ability can be surely maintained.

In this embodiment, the SBR mixed with the adsorbent may be foamed. By foaming an adhesive such as SBR, the adsorbent is supported on the porous body, and thus has the above-mentioned advantages.

In the present embodiment, SBR is used as the adhesive, but another adhesive may be used. However,
The versatile SBR is relatively inexpensive and can be molded at a relatively low temperature, so that when foaming, not only can mechanical foaming be carried out, but also mixed A
It is preferable because it has an advantage that it is difficult to lower the DH adsorption ability.

Further, in this embodiment, the backing portion is made of an adhesive and a backing material such as a nonwoven fabric. For example, the backing portion may be made of only the adhesive. Further, the backing portion is provided on the entire back surface of the carpet main body, but it does not necessarily have to be provided on the entire back surface, and may be provided, for example, in a band shape along the pile yarn setting direction. . In addition, in the present embodiment, the adsorbent is not provided on the foamed or non-foamed adhesive, and the adsorbent is provided on the carpet body by means such as applying the adsorbent to the backing material. Good.

Further, in the present embodiment, the pile portion is formed in a tuft shape by cutting the top portion, but the pile portion may be formed into a loop-shaped pile portion without cutting. Further, the carpet body is not limited to the structure in which the pile portion is formed. Further, in the present embodiment, a known cloth-like body such as a woven or non-woven fabric of a synthetic fiber or a natural fiber or a molded sheet may be used for the base cloth. In addition, in this embodiment, the backing material is made of a nonwoven fabric, but a known cloth material such as a jute or a foamable sheet may be used, for example.

Means for removing odor components by providing the above-mentioned various adsorbents in wallpaper or the like may be considered. However, providing an adsorbent in a carpet as in the present invention means deodorizing the interior of a room. It is particularly significant from the point of view. That is, odor components such as formaldehyde are mainly generated from the adhesive of the plywood, and if an adsorbent for adsorbing the odor components on the carpet is provided, the odor components do not disperse indoors. If the adsorbent is provided in the wallpaper or the like, the odor component is once dispersed in the room and then adsorbed, so that the resident will inhale the odor component.

<Second Embodiment> The present embodiment relates to a carpet having a structure in which the fiber yarn itself constituting the carpet body is provided with an adsorbent, and the description of the same parts as those in the first embodiment will be omitted, and the drawings will be omitted. No. is used.

In FIG. 2, the pile portion 3 is made of a fiber yarn obtained by spinning a gel spinning stock solution in which a known chemical fiber raw material is mixed with an adsorbent such as ADH by wet or dry spinning. The carpet main body 1 according to the present embodiment uses the tightening thread 6 without using the base cloth as the base cloth part 2, and woven the tightening thread 6 and the fiber thread provided with the adsorbent with a loom, and This is a structure in which a tuft-like pile portion 3 is formed in 2a. Various backing parts 5 exemplified in the first embodiment are provided on the back surface 2b of the carpet body 1 as necessary.

In the carpet having the above structure, since the carpet body 1 itself is provided with an adsorbent, its surface is
Odor components such as formaldehyde are adsorbed from 2a. In addition, since the pile portion 3 is formed in a tufted shape by cutting off the top portion, the area where the adsorbent comes into contact with air increases as compared with the loop-shaped pile portion, and the odor of formaldehyde and the like is increased quickly and with a large amount. There is an advantage that components can be adsorbed.

In this embodiment, a pile portion may be formed by using a base cloth portion as in the first embodiment and implanting a fiber yarn provided with an adsorbent therewith. Furthermore, although the above-described advantages are obtained by forming a tuft-shaped pile portion, the pile portion is not necessarily limited to the tuft shape, and may be a loop shape, or may be a structure in which the pile portion is not formed.

<Third Embodiment> The present embodiment relates to a carpet having a structure in which an adsorbent is provided in a base cloth portion.
The description of the same parts as those of the embodiment is omitted, and the numbers in the drawings are used.

The base cloth 2 is, for example, 50 to 250 g / m
^{It is} composed of a non-woven fabric having a fiber amount of about ² and one side coated with a paint containing an adsorbent such as ADH in a vinyl acetate-based, acrylic-based, urethane-based emulsion or the like. The pile portion 3 is provided on the base fabric portion 2 by a tufting process, and the backing portion 5 is formed by a backing process.
Is provided. In the carpet having the above configuration, since the base cloth portion 2 is provided with the adsorbent, odor components such as formaldehyde are adsorbed.

In the present embodiment, a paint containing an adsorbent such as ADH is applied to one surface of the base fabric portion. However, the paint may be applied to both surfaces. In addition, the base cloth 2
Is made of a non-woven fabric, but may be another cloth-like body such as a woven fabric. Further, it may have a cotton-like layer thereon. Further, in the present embodiment, the adsorbent is provided by applying a paint containing an adsorbent such as ADH to one surface of the base cloth portion. The adsorbent may be provided by mixing itself with an adsorbent such as ADH.

<Fourth Embodiment> The present embodiment relates to a carpet having a structure in which a paint containing an adsorbent is sprayed on a carpet body and the adsorbent is provided. The description is omitted, and the numbers in the drawings are used.

The pile portion 3 is provided on the base fabric portion 2 through a tufting process. Next, during the backing process, the pile portion 3
Is sprayed with a paint containing an adsorbent such as ADH in a vinyl acetate-based, acrylic-based, urethane-based emulsion or the like. An adhesive 5a is applied to the back surface 2b of the base cloth portion 2 (a backing material 5b is attached as necessary), and the adhesive 5a
And the paint containing the adsorbent are simultaneously dried by a dryer, and the adsorbent is fixed to the pile unit 3 together with the backing unit 5.

Since the carpet having the above structure is also provided with an adsorbent, odor components such as formaldehyde are adsorbed.

<Fifth Embodiment> This embodiment relates to a carpet having a felt structure, and the description of the same parts as those of the first embodiment will be omitted, and the numbers in the drawings will be used as appropriate.

In FIG. 3, the carpet body 1 has a backing material 10a made of a foamed sheet, and an SBR is applied as an adhesive 5a to a back surface 10a of a felt portion 10 made of one or more layers. 5b is attached and the backing part 5 is provided. The felt constituting the felt portion 10 may be a known felt such as a needle felt, a woven felt, and a compressed felt. The foamable sheet constituting the backing material 5b is made of a resin material containing an adsorbent such as ADH and foamed by a foaming means such as a foaming agent to form a sheet.

Since the carpet having the above-mentioned structure is also provided with an adsorbent, odor components such as formaldehyde are adsorbed.

<Sixth Embodiment> The present embodiment relates to a carpet having a structure in which a carpet body and an adsorbent containing an adsorbent are formed separately and the adsorbent is attached to the carpet body. The description of the same parts as those in the first embodiment is omitted, and the numbers in the drawings are appropriately used.

In FIG. 4, the adsorbent 7 is formed in a belt shape by mixing a known synthetic resin with an adsorbent such as ADH. It is preferable to foam such a synthetic resin because it becomes a porous body. The adsorbent 7 is coated with a pressure-sensitive adhesive or the like, and the adsorbent 7 is wound into a roll to form a winding tape 8. The carpet according to the present embodiment is
It is constituted by adhering the adsorbent 7 to an arbitrary position of the carpet body 1.

According to the carpet having the above structure, if the adsorbent sufficiently adsorbs odor components such as formaldehyde and the adsorbing ability is significantly reduced, the adsorbent 7 can be replaced.
There is an advantage that a carpet that absorbs odor components again can be configured. In addition, according to the adsorbent 7 illustrated in the present embodiment, it can be attached to a conventionally used carpet.

[0065]

EXAMPLES Examples 1 to 6 and comparative examples will be given below,
The effect of the carpet according to the present invention will be specifically described. Example
1 to 6 and Comparative Examples are the same as those in the first embodiment.
A carpet with a pile structure was used.
Bubbles. That is, as shown in Table 1 below,
Backing part made of foamable SBR with foam ratio is provided
Each carpet has a foaming SBR of 300
g / m ^TwoCoated. In addition, foamable SBR refers to SBR
The marjon is stirred by a stirrer to form a viscous liquid,
The viscous liquid was gelled by heating at 135 ° C using a heater.
Machine that cures and stabilizes for a specified time after
Manufactured by foaming.

(Examples 1 to 3) The carpet bodies of Examples 1 to 3 were formed by using an acrylic / polyester blended yarn (50:50) as the pile yarn and forming a pile with a basis weight of 500 g / m ^2. A plain weave fabric made of polypropylene was used as the cloth (100 g of polypropylene).
/ M ² ). Further, as an adsorbent, each weight% of A shown in Table 1 was used.
DH is mixed with foamable SBR. (Examples 4 to 6) The carpet bodies of Examples 4 to 6 are made of a pile yarn and an acrylic / polyester blend yarn (50:50).
Was used to form a pile having a basis weight of 500 g / m ² , and a nonwoven fabric made of polyester was used as a base fabric (amount of polyester was 95 g / m ² ). Table 1
% Of ADH is mixed with the foamable SBR.

(Comparative Example) The carpet body of the comparative example is composed of a pile yarn and an acrylic / polyester blend yarn (50:50).
To form a pile having a pile weight of 500 g / m ² , and a plain weave woven cloth made of polypropylene was used as a base cloth (amount of polypropylene: 100 g / m ² ). In addition, the foamable SBR constituting the backing part has AD
H is not mixed.

(Test Method and Results) Each of the carpets of Examples 1 to 6 and Comparative Example was cut into a size of 5 cm × 5 cm to obtain a test piece, and an aluminum foil was attached to the surface provided with the backing portion. Further, a gas-impermeable tape is stuck on the aluminum foil, and the gas-impermeable tape is stuck to the periphery of the pile portion of the carpet body by 5 mm, and an opening of 4 cm × 4 cm is formed on the pile portion side of the carpet body. The gas was shut off leaving the window.

After the test piece is set up in a glass container having a volume of 415 ml, a commercially available 90% aqueous acetaldehyde aqueous solution is diluted with 5 ° C. water, and the acetaldehyde aqueous solution is dropped on the bottom of the glass container using a micro cylinder. The opening of the glass container was closed with a gas-impermeable film (trade name: Ciron Film, manufactured by Fuji Photo Industry Co., Ltd.), and the concentration of acetaldehyde in the container was adjusted to 470 ppm. After the container was allowed to stand in a sealed state at room temperature of 25 ° C. for 60 hours, the air in the container was sucked by a gas suction device, and the gas detector tube NO. Using 92 (manufactured by Gastech), the concentration of acetaldehyde was measured. Table 1 shows the results.

[0070]

[Table 1]

In all of Examples 1 to 6, acetaldehyde was completely removed from the air in the container, and in the comparative example, a very small amount of acetaldehyde was removed. From these results, it was demonstrated that the test pieces of Examples 1 to 6 were excellent in acetaldehyde adsorption.

Further, the test pieces used in Examples 1 to 6 were transferred to a glass container having a capacity of 1200 ml, acetaldehyde was dropped, and the concentration of acetaldehyde in the container was 956.
ppm, and the concentration of acetaldehyde in the container was measured again after 60 hours in the same manner. Table 2 shows the results.

[0073]

[Table 2]

In Examples 2 and 5, acetaldehyde was almost removed, but in Examples 1, 3, 4 and 6, acetaldehyde remained in the air.

Further, with respect to the test pieces used in Examples 2 and 5, acetaldehyde was dropped into the same container having a capacity of 1200 ml, and the acetaldehyde concentration in the container was 431.
ppm, and the concentration of acetaldehyde in the container was measured again after 60 hours in the same manner. Table 2 also shows the results.

Table 3 shows the results obtained by converting the total amount of acetaldehyde adsorbed on the test pieces of Examples 1 to 6 and Comparative Example into grams.

[0077]

[Table 3]

From Table 3, it was proved that the larger the amount of ADH, the larger the amount of acetaldehyde adsorbed, and the higher the foaming ratio, that is, the more porous the material, the larger the amount of acetaldehyde adsorbed. In this example, acetaldehyde was used as the aldehyde in order to simplify the measurement.
It is obvious to those skilled in the art that other aldehydes such as formaldehyde have the same effect.

[0079]

As described above, when the carpet according to the present invention is used, odor components such as formaldehyde generated from the floor surface and acetaldehyde dispersed in the room are adsorbed by the adsorbent provided. The odor component is not dispersed in the room, and the odor component already dispersed in the room is also adsorbed and removed from the air, so that the room is deodorized. Therefore, the resident hardly sucks the odor component, so that the resident does not feel a bad smell in the room, and furthermore, there is no possibility that the resident's health is impaired.

Further, according to the means of the present invention, odor components such as formaldehyde can be adsorbed more quickly and in a large amount. In particular, as described in claim 3, adipate dihydrazide is used as an adsorbent. If there is, the effect is remarkable.

[Brief description of the drawings]

FIG. 1 is a partially omitted sectional view showing a first embodiment of a carpet according to the present invention.

FIG. 2 is a partially omitted cross-sectional view showing a second embodiment of the carpet according to the present invention.

FIG. 3 is a partially omitted sectional view showing a fifth embodiment of the carpet according to the present invention.

FIG. 4 is a partially omitted perspective view showing a sixth embodiment of the carpet according to the present invention.

[Explanation of symbols]

 1. Carpet body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor, Kiyomitsu Yagi 1256, Kudamatsu, Kishiwada-shi, Osaka Otsuka Chemical Co., Ltd. Kishiwada Office (72) Inventor, Katsura Torii 3-2-2, Ote-dori, Chuo-ku, Osaka-shi, Osaka Otsuka Chemical Co., Ltd. (72) Inventor Yoshihisa Tomotaki 463 Kagasuno, Kawauchi-cho, Tokushima City, Tokushima Prefecture Otsuka Chemical Co., Ltd. (72) Inventor Kazuki Kamiya 463 Kasuno, Kawauchi-cho, Tokushima City, Tokushima Prefecture Inside the Tokushima Plant Co., Ltd.

Claims (3)

[Claims] 1. A carpet, wherein the carpet body (1) is provided with an adsorbent for adsorbing at least aldehydes. 2. The carpet according to claim 1, wherein the adsorbent is carried on a porous body. 3. The carpet according to claim 1, wherein the adsorbent contains at least an adipic dihydrazide compound.