JP2011098188A - Surface material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface material that has good deodorizing effect. <P>SOLUTION: The surface material 10 comprises a packing layer 12 and a surface layer 11 stacked up on one surface side of the packing layer 12. The packing layer 12 comprises first impregnated activated carbon 122 formed by amine compounds impregnated in activated carbon, and second impregnated activated carbon 123 formed by alkali carbonate impregnated in activated carbon. When the mass percent of second impregnated activated carbon 123 is 100%, the mass percent of alkali carbonate can be 10 to 25%. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a skin material, and more particularly, to a skin material having deodorizing properties.

In recent years, due to the improvement in airtightness in automobile vehicles and indoors, there is a tendency that the deodorizing action that has been performed by switching between outside air and inside air has become difficult to obtain, and it is possible to deodorize odors in automobile vehicles and indoors. It is desired.
Conventionally, a tufting carpet in which a deodorizing action or an antibacterial action is imparted to a sealing layer is known (Patent Document 1 below).

JP 2008-206802 A

However, there are cases where it is difficult to obtain a sufficient deodorizing effect with conventional techniques. That is, for example, under the situation where the temperature of the deodorizing environment changes, the carboxylic acid-based material such as acetic acid adsorbed at room temperature is re-released at a high temperature, particularly 60 ° C. or higher. There is a problem. This problem is particularly problematic in an environment such as an automobile where the indoor temperature changes drastically.
This invention is made | formed in view of the prior art, and it aims at providing the skin material which can exhibit the deodorizing effect more excellent compared with the past.

The present invention is as follows.
<1> A skin material comprising a sealing layer and a skin layer laminated on one side of the sealing layer,
The sealing layer includes a first impregnated activated carbon and a second impregnated activated carbon,
In the first impregnated activated carbon, an amine-based material is impregnated with activated carbon.
The second impregnated activated carbon has an alkali metal carbonate adhering to the activated carbon,
The skin material, wherein the second impregnated activated carbon has a ratio of alkali metal carbonate of 10 to 25% by mass when the total amount is 100% by mass.
<2> The skin material according to <1>, wherein the second impregnated activated carbon is contained in an amount of 25 to 75% by mass when the total of the first adsorbed activated carbon and the second impregnated activated carbon is 100% by mass.
<3> The skin material according to <1> or <2>, further including a backing layer on the other surface side of the sealing layer.
<4> The skin layer includes a base fabric layer, an adhesive layer, and a sound absorbing layer in this order, and the sound absorbing layer is laminated on one surface side of the sealing layer. A skin material according to any one of the above.
<5> The skin material according to <3>, wherein the backing layer includes a plurality of layers.

According to the skin material of the present invention, excellent deodorizing properties can be obtained. In particular, it is possible to obtain a deodorizing property excellent in a property of suppressing re-release of a carboxylic acid-based material under a high temperature environment.
When the total of the first impregnated activated carbon and the second impregnated activated carbon is 100% by mass, when the second impregnated activated carbon is contained in an amount of 25 to 75% by mass, more excellent deodorizing characteristics can be obtained.
Even in the case where a backing layer is further provided on the other side of the sealing layer, the skin material of the present invention can provide an excellent deodorizing effect. In particular, even if the backing layer is non-breathable, an excellent deodorizing effect can be exhibited.
When the skin layer includes a base fabric layer, an adhesive layer, and a sound absorbing layer in this order, and the sound absorbing layer is laminated on one surface side of the sealing layer, the deodorizing characteristics according to the present invention are sufficiently obtained. In addition, a sound absorbing effect can be obtained.

It is sectional drawing which shows an example of the skin material of this invention typically. It is sectional drawing which shows the other examples of the skin material of this invention typically. It is sectional drawing which shows the other examples of the skin material of this invention typically. It is sectional drawing which shows the other examples of the skin material of this invention typically.

  The skin material 10 of the present invention is a skin material provided with a sealing layer 12 and a skin layer 11 laminated on one surface side of the sealing layer 12, and the sealing layer 12 includes a first impregnated activated carbon 122, The first impregnated activated carbon 122 includes an amine-based material adhering to the activated carbon, and the second impregnated activated carbon 123 includes an alkali metal carbonate adhering to the activated carbon. The impregnated activated carbon 123 is characterized in that the ratio of the alkali metal carbonate is 10 to 25% by mass when the total amount is 100% by mass.

  The “skin layer (11)” is a layer constituting the skin portion of the present skin material, and is usually a fiber layer capable of forming a raised state on the surface thereof. The structure of the skin layer is not particularly limited, and for example, tufted cloth (see reference numeral 11 in FIGS. 1 and 3), non-woven fabric (see reference numeral 11 in FIGS. 2 and 4), woven fabric, knitted fabric, and the like can be used.

  Among these, as illustrated in FIG. 1, the tufted cloth is a cloth (carpet) formed by tufting a pile yarn 112 on a base cloth (base cloth layer) 111. Further, as illustrated in FIG. 3, a cloth (carpet) obtained by tufting a pile yarn 112 on the base fabric 111 and other layers may be used. Examples of the other layer include a sound absorbing layer, a heat insulating layer, and a cushion layer. These layers may be used alone or in combination of two or more layers. In addition, these layers can interpose an adhesive layer in order to bond the layers.

The kind of the base fabric 111 which comprises the said tuft cloth is not specifically limited, Although various nonwoven fabrics and various woven fabrics can be used, a nonwoven fabric is preferable and also a spun bond is preferable. Furthermore, the material is not particularly limited, and examples thereof include polyester, polyamide, and polyolefin. Polyester is preferable. That is, the base fabric 111 is preferably a polyester spunbonded nonwoven fabric. The basis weight when the base fabric 111 is spunbond is not particularly limited, but is preferably 50 to 150 g / m ^{2, and} more preferably 80 to 120 g / m ² .

  On the other hand, as the pile yarn, a loop pile whose tip is a loop, a cut pile whose tip is cut, and the like can be used. These may use only 1 type and may use 2 or more types together. Furthermore, it is preferable that the tip of the pile yarn on the side opposite to the outer skin protrudes in a U-shape on the side of the sealing layer as illustrated in FIGS. 1 and 3. Thereby, it can be reliably sealed by the sealing layer and the pile yarn can be effectively prevented from falling off. Moreover, the material of the pile yarn is not particularly limited, and examples thereof include polyester, polyamide, polyolefin, and the like, and polyamide is preferable.

Further, when the skin layer 11 (the base fabric 111 in the case where the skin layer 11 is composed of a plurality of layers) is composed of a nonwoven fabric (see FIGS. 2 and 4), the nonwoven fabric may be any nonwoven fabric. Good. Moreover, a more effective raised state (for example, velor tone etc.) can be formed and used by punching a nonwoven fabric with a needle. Furthermore, the material is not particularly limited, and examples thereof include polyester, polyamide, and polyolefin. Polyester is preferable. That is, a polyester needle punched nonwoven fabric is preferred. Furthermore, a twin needle punch nonwoven fabric in which two nonwoven fabrics are laminated and needle punched can be used. When the fabric base fabric 111 is a nonwoven fabric, the fineness of the constituent fibers of the nonwoven fabric is not particularly limited, but is preferably 2.2 to 17 dtex (particularly, 6.6 to 11 dtex).
In addition, hook carpets, stepped carpets, and the like can also be used.

  In addition, as illustrated in FIG. 4, in the case where the skin layer 11 is composed of a plurality of layers while using a nonwoven fabric (nonwoven fabric without pile yarn) as the base fabric 111, other than the base fabric 111 As the layer, a sound absorbing layer, a heat insulating layer, a cushion layer, or the like can be used. These layers may be used alone or in combination of two or more layers. Furthermore, these layers can intervene an adhesive layer to bond the layers.

A sound absorbing layer 113 (see FIGS. 3 and 4) that can be used as a part of the skin layer 11 is a layer for absorbing sound. The structure of the sound absorbing layer is not particularly limited as long as the sound absorbing property can be exhibited. For example, a polyester nonwoven fabric subjected to needle punching can be used. In particular, the fineness of the nonwoven fabric fibers is preferably 2.2 to 17 dtex, particularly 6.6 to 11 dtex, in order to exhibit sound absorbing properties.
The adhesive layer is a layer for interposing these two layers by interposing between the two layers. Examples of the adhesive layer include a layer made of only an adhesive, a layer formed by applying an adhesive to a breathable film, and a heat-sealing layer (a layer made of a thermoplastic resin or the like melted between two layers by heating). ) And the like. These layers may use only 1 type and may use 2 or more types together. In addition, the adhesive layer may be a hole formed by tufting to allow ventilation, and therefore an adhesive may be applied to a non-breathable film.

The “sealing layer” is a layer for sealing fibers constituting the skin layer, and is a layer containing the first impregnated activated carbon 122 and the second impregnated activated carbon 123 (hereinafter also simply referred to as “impregnated activated carbon”). . The structure of the sealing layer is not particularly limited as long as it contains impregnated activated carbon and can seal the skin layer. However, in order to exhibit both of these characteristics, the organic polymer component 121 is usually included.
Although the organic polymer component 121 is not particularly limited, for example, acrylic resin, urethane resin, polyvinyl chloride resin, polyethylene, polypropylene, ethylene-vinyl acetate copolymer (EVA) resin, SBR (styrene-butadiene rubber), Examples of the rubber component include NBR (acrylonitrile-butadiene rubber) MBR (methyl methacrylate-butadiene rubber) and natural rubber. Of these, acrylic resins are preferred. These organic polymer components may be used alone or in combination of two or more.

  Further, the organic polymer component 121 may be included in the sealing layer in any form, but in order to exhibit the adsorption characteristics of the impregnated activated carbon included in the sealing layer more effectively, It has preferable air permeability (porosity). Although this air permeability may be given in any way, for example, by making it in a foamed state, an open cell structure is obtained, while sufficiently exerting a sealing function for the fibers constituting the skin layer, Aeration can be obtained, and the impregnated activated carbon contained in the sealing layer can function more effectively.

The method for forming the sealing layer is not particularly limited. Usually, the back surface side of the skin layer is obtained by using various coating methods for the dispersion in which the organic polymer component 121 and the impregnated activated carbon 122 and 123 are dispersed in a dispersion medium. And then the dispersion medium is removed (dried). In addition, the dispersion can be subjected to pH adjustment to improve the dispersion state of the dispersoid as necessary. Further, an anti-settling agent for suppressing the impregnated activated carbon from settling in the dispersion can be blended. The coating method is not particularly limited, and can be formed by various methods such as a roll coater, a bar coater, spray coating, and dipping.
Further, the coating amount (coating amount) is not particularly limited, but is preferably 5 to 200 g / m ^{2 and} more preferably 50 to 100 g / m ^{2 in} terms of the solid content of the dispersion.
The kind of the dispersion medium of the dispersion is not particularly limited, and an organic dispersion medium may be used, but an aqueous dispersion medium is preferably used, and water is particularly preferable.

Furthermore, as described above, since the sealing layer in the present invention preferably has air permeability, a dispersion containing an organic polymer component and an impregnated activated carbon is foamed (in the form of a mousse) and applied. Is preferred. Thereby, a porous sealing layer is formed and air permeability is obtained, so that the impregnated activated carbon disposed inside the sealing layer can function more effectively. Although the expansion ratio in the case of foaming is not particularly limited, it is usually preferably 2 times or more and more preferably 4 to 9 times. Here, the expansion ratio, the specific gravity of the dispersoid before foaming (minus the dispersion medium from the dispersion) and D _A, the specific gravity of the sealing layer with a value of D _{B /} D _A in the case where a D _B is there.

  The “first impregnated activated carbon” is activated carbon impregnated with an amine-based material. This amine-based substance is a component having a —NH— structure in the molecule. Amine-based substances include hydroxylamine, chloramine, ammonia, methanolamine, ethanolamine, dimethylamine, diethylamine, isopropylamine, butylamine, proline, hydroxyproline, dicyanodiamide, ethyleneimine, ethylenediamine, propylenediamine, diethylenetriamine, 2-diethylamino. Ethanol, 2-dimethylaminoethanol, 1,2-diaminopropane, 1,3-diaminopropane, triethylenetetramine, tetraethylenepentamine, iminobispropylamine, tetramethylenediamine, guanidine carbonate, glycine, alanine, sarcosine, glutamic acid , Hexamethylenediamine, melamine, morpholine, 2-amino-4,5-dicyanoimidazole, 3-azahe Sun-1,6-diamine, hexamethylenediamine, 2-acrylamido-2-methylpropanesulfonic acid, α-amino-ε-caprolactam, acetoguanamine, guanine, acetaldehyde ammonia, 4,7-diazadecane-1,10-diamine , Pyrrolidine, piperidine, piperazine, polyethyleneimine, polyallylamine, polyvinylamine, aminobenzoate, thiourea, methylurea, ethylurea, dimethylurea, diethylurea, ethyleneurea, acetylurea, guanylurea, guanylthiourea, azodicarbon Amide, glycolyl urea, acetyl urea, formamide, acetamide, benzamide, oxamide, pyrrolidone, pyrrolidone carboxylic acid, oxamic acid, succinic acid amide, dicyandiamide, oxazolidone Malonamide succinimide, phthalimide, maleimide, succinimide, hydantoin, barbituric acid, 1-methylol-5,5-dimethylhydantoin, isocyanuric acid, such as aniline. These may use only 1 type and may use 2 or more types together. Among these, amine-based substances having amino groups are preferable, and it is particularly preferable that ethanolamine (monoethanolamine), morpholine, aniline, ethyleneurea and piperazine are contained as amine-based substances.

On the other hand, the activated carbon as an attachment base material in the first impregnated activated carbon is not particularly limited, and various types can be used. That is, for example, activated carbon activated by a known method using coconut shell, sawdust, coal, charcoal, resin, or the like as a raw material can be used. Among these, activated carbon derived from a coconut shell is preferable from the viewpoint of a large specific surface area and a large amount of pore distribution with a diameter of 2 nm or less (a pore diameter distribution is preferable). The form is not particularly limited, and activated carbon such as powder, crushed, and fiber can be used. However, since the surface area is preferably larger and smaller, powdered activated carbon is preferable.
Further, the particle size of the activated carbon is not particularly limited, but is preferably 1 to 300 μm, and more preferably 10 to 100 μm. In this range, it is difficult for the sealing layer to be covered with the organic polymer component, the falling off of the impregnated activated carbon can be sufficiently suppressed, and the impregnated activated carbon can function more effectively. The preferred particle size of the impregnated activated carbon is the same as the preferred particle size of the activated carbon as the adhering substrate.

The ratio of the amine-based material in the first impregnated activated carbon is not particularly limited, but when the total amount of the first impregnated activated carbon is 100% by mass, the amine-based material is preferably 1 to 50% by mass, and 5 to 20% by mass. % Is more preferable, and 5 to 10% by mass is particularly preferable.
Examples of components suitable for the adsorption of the first impregnated activated carbon include aldehyde-based substances such as acetaldehyde, formaldehyde, propionaldehyde and the like. Note that the first impregnated activated carbon also maintains the adsorption performance for the adsorbing component for which the activated carbon as the adhering substrate originally has appropriateness. Examples of the adsorbing component include hydrocarbon substances such as toluene, xylene, and ethylbenzene.

The “second impregnated activated carbon” is activated carbon impregnated with an alkali metal carbonate. Activated carbon as an impregnation base material has an adsorption characteristic for carboxylic acid-based substances even when no alkali metal carbonate is impregnated. However, since the alkali metal carbonate is impregnated, The re-release of the carboxylic acid substance can be suppressed. In particular, the re-release of the carboxylic acid substance can be suppressed particularly remarkably by setting the amount of attachment within the range of the present invention.
Examples of the alkali metal carbonate include lithium carbonate, sodium carbonate, potassium carbonate, lithium hydrogen carbonate, sodium hydrogen carbonate, and potassium hydrogen carbonate. Of these, potassium carbonate and potassium hydrogen carbonate are preferable, and potassium carbonate is more preferable.

  On the other hand, the activated carbon as the attachment base material in the second impregnated activated carbon is not particularly limited, and various types can be used, and the activated carbon as the attachment base material in the first impregnated activated carbon can be applied as it is. However, the activated carbon in the first impregnated activated carbon and the activated carbon in the second impregnated activated carbon may be the same or different.

  The ratio of the alkali metal carbonate in the second impregnated activated carbon (hereinafter also referred to as “the amount of impregnation”) is 10 to 25% by mass of the alkali metal carbonate when the total amount of the second impregnated activated carbon is 100% by mass. It is. If the amount of adhesion is less than 10% by mass, it is not preferable because the re-release of the carboxylic acid substance at high temperature cannot be suppressed. On the other hand, if the amount of addition exceeds 25% by mass, it is not preferable because the adsorption characteristics for other organic components other than the carboxylic acid substance possessed by the activated carbon as the attachment base material are deteriorated. The amount of this attachment is more preferably 10 to 20% by mass. In this range, the adsorption characteristics for other organic components can be further improved while suppressing the re-release of the carboxylic acid substance. Moreover, it is especially preferable that this amount of addition is 10-15 mass%. In this range, while suppressing the re-release of the carboxylic acid substance, the fluctuation of the adsorption characteristics with respect to other organic components is effectively suppressed, and other organics equivalent to the case where no alkali metal carbonate is added are used. Adsorbability with respect to components can be obtained.

  Examples of components that can be adsorbed by the second impregnated activated carbon include various acid gases. Examples of the acid gas include acetic acid, hydrogen sulfide, mercaptan, and butyric acid. Note that the second impregnated activated carbon also maintains the adsorption performance for the adsorbing component for which the activated carbon as the adhering substrate originally has appropriateness. Examples of the adsorbing component include hydrocarbon substances such as toluene, xylene, and ethylbenzene.

  The blending ratio of the first impregnated activated carbon and the second impregnated activated carbon is not particularly limited. The total amount of the first impregnated activated carbon and the second impregnated activated carbon is 100% by mass, and the ratio of the second impregnated activated carbon (hereinafter referred to as “second impregnated activated carbon”). The content of “activated carbon” is preferably 25 to 75% by mass, more preferably 25 to 50% by mass. In this range, the characteristics of both the first impregnated activated carbon and the second impregnated activated carbon can be effectively obtained. In other words, while achieving high adsorption performance for both aldehyde-based materials and carboxylic acid-based materials, it suppresses the re-release of carboxylic acid-based materials at high temperatures, and also exhibits high adsorption characteristics for hydrocarbon-based materials. be able to.

  In particular, in the correlation with the amount of addition, when the amount of addition of the second activated carbon is more than 15% by mass and 25% by mass or less, the content of the second additive activated carbon should be 30% by mass or less. Is preferable, and 25-30 mass% is preferable. In this range, by using non-impregnated activated carbon in combination, it is possible to improve the adsorption characteristics for the hydrocarbon-based material while more effectively exhibiting the characteristics of both the first-impregnated activated carbon and the second-impregnated activated carbon.

  On the other hand, when the addition amount of the second impregnated activated carbon is 10% by mass or more and 15% by mass or less, the content of the second impregnated activated carbon is preferably more than 30% by mass, and preferably 35 to 50% by mass. Within this range, high adsorption performance for both aldehyde-based materials and carboxylic acid-based materials can be obtained by using only the first-impregnated activated carbon and the second-impregnated activated carbon without using (without substantially containing) the non-implanted activated carbon. In addition, it is possible to suppress the re-release of the carboxylic acid-based material at a high temperature and to exhibit high adsorption characteristics for the hydrocarbon-based material. In this case, two kinds of impregnated activated carbons may be mixed and blended into the skin material, the mixing operation is simple, the manufacturing equipment can be simplified, and the workability is excellent.

  In addition, when other impregnated activated carbons other than the first impregnated activated carbon and the second impregnated activated carbon (the non-implanted activated carbon and other impregnated activated carbon described later) are used in combination, the first impregnated activated carbon, the second impregnated activated carbon, and other impregnations. The total amount of activated carbon is 100% by mass, and the proportion of other impregnated activated carbon is preferably 30% by mass or less, more preferably 1 to 30% by mass, and particularly preferably 1 to 25% by mass.

  The non-impregnated activated carbon is activated carbon that serves as an attachment base material for the impregnated activated carbon. That is, for example, activated carbon activated by a known method using coconut shell, sawdust, coal, charcoal, resin, or the like as a raw material can be used. Among these, activated carbon derived from a coconut shell is preferable from the viewpoint of a large specific surface area and a large amount of pore distribution with a diameter of 2 nm or less (a pore diameter distribution is preferable). The form is not particularly limited, and activated carbon such as powder, crushed, and fiber can be used. However, since the surface area is preferably larger and smaller, powdered activated carbon is preferable. Furthermore, the preferable particle size is the same as that in the impregnated activated carbon.

  In addition, the first impregnated activated carbon and the second impregnated activated carbon are within a range that does not impede their purpose, the first impregnated activated carbon is not an amine-based material, and the second impregnated activated carbon is the alkali metal carbonate. Other than that, other adhering components may be attached. Examples of other adhering components include other salts except alkali metal halides and alkali metal carbonates. Examples of the alkali metal include Na, K, and Li. Examples of the halogen constituting the halide include bromine and iodine. Examples of the salt include hydroxide. These components may use only 1 type and may use 2 or more types together.

Furthermore, these impregnation components may be blended as other impregnated activated carbon (hereinafter simply referred to as “third impregnated activated carbon”) in addition to the first impregnated activated carbon and the second impregnated activated carbon.
In addition to the first impregnated activated carbon, the second impregnated activated carbon, and the third impregnated activated carbon, a fourth impregnated activated carbon for adsorbing a basic gas can be contained. The configuration of the fourth impregnated activated carbon is not particularly limited, but an impregnated activated carbon impregnated with an acidic substance is preferable. Examples of the acidic substance include water-soluble acid components (components that are acidic when dissolved in water, phosphoric acid, sulfuric acid, and the like). These components may use only 1 type and may use 2 or more types together. Examples of the adsorption component (basic gas) of the fourth impregnated activated carbon include ammonia, trimethylamine, and pyridine.

  As described above, the filler layer is preferably formed from a dispersion containing an organic polymer component and an impregnated activated carbon. The dispersion of the dispersion may be maintained depending on the pH. In such a case, the dispersion state of the dispersion is better maintained by using an impregnated activated carbon with little fluctuation in pH. it can. From this viewpoint, the pH of activated carbon alone is preferably 6-9. The first impregnated activated carbon and the second impregnated activated carbon are preferable because the pH is easily maintained at 6 to 9 when mixed with the dispersion and the dispersion state of the dispersion can be further maintained.

Moreover, when pH changes with the mixing | blending of the said impregnated activated carbon, pH adjustment can be performed. As pH adjustment, when adjusting pH to the acidic side, citric acid, phosphoric acid, sulfuric acid, hydrochloric acid, etc. can be used. These may use only 1 type and may use 2 or more types together. On the other hand, when adjusting the pH to the basic side, sodium hydroxide, magnesium hydroxide, potassium hydroxide, ammonia or the like can be used. These may use only 1 type and may use 2 or more types together.
In addition, a surfactant can be blended in order to improve the dispersibility of the dispersion. Anionic, cationic, nonionic and amphoteric surfactants can be used as the surfactant. These may use only 1 type and may use 2 or more types together. Furthermore, in order to adjust the viscosity of the dispersion, a thickener can be blended. By adjusting the viscosity of the dispersion, the degree of penetration into the skin layer can be adjusted. Furthermore, as described above, an anti-settling agent for suppressing the impregnated activated carbon from settling in the dispersion can be blended.

  Furthermore, the blending ratio of the organic polymer component {particularly the solid content in the dispersion (latex)} and the impregnated activated carbon is not particularly limited, but the impregnated activated carbon can be 10 to 90% by mass, and 20 to 80% by mass. % Is preferable, 30 to 70% by mass is more preferable, and 30 to 50% by mass is particularly preferable. In the preferred range, the impregnated activated carbon can be effectively fixed in the sealing layer and the impregnated activated carbon can function effectively while reducing the ratio of the surface of the impregnated activated carbon covered with the organic polymer component. it can. In particular, in the more preferable range and the particularly preferable range, the effect is remarkably obtained.

  The skin material of the present invention can have other configurations in addition to the skin layer and the sealing layer. Another configuration includes a backing layer (symbol 13 in FIGS. 1 to 4). The backing layer is a layer disposed on the other surface side (back surface side) of the sealing layer, functions as a sound insulation layer that blocks sound from the other surface side, and further improves shape retention. be able to. Further, this backing layer may consist of only one layer or a plurality of layers. The multilayered backing layer may be composed of any number of layers, but is usually 2 to 5 layers, more preferably 2 to 3 layers. In the case of a plurality of layers, each layer can have a different function.

  The material of the backing layer is not particularly limited, but can be formed of resin, elastomer, rubber, or the like. Thereby, it can be set as the skin material excellent in sound insulation. The resin is preferably a thermoplastic resin. Examples of the thermoplastic resin include polyolefin resins and polyvinyl chloride resins. These may use only 1 type and may use 2 or more types together. Of these, polyolefin resins are preferred, polyethylene is more preferred, and low density polyethylene is particularly preferred. Excellent sound insulation can be exhibited while having sufficient strength, flexibility and processability. Examples of the elastomer include olefin-based thermoplastic elastomers, styrene-based thermoplastic elastomers, urethane-based thermoplastic elastomers, polyester-based thermoplastic elastomers, and polyamide-based thermoplastic elastomers. These may be used alone or in combination of two or more. Furthermore, examples of the rubber include butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, natural rubber, isoprene rubber, and chloroprene rubber. These may be used alone or in combination of two or more.

  This backing layer may have air permeability, but is preferably a layer that does not have air permeability. As a result, in addition to the excellent sound insulation properties, waterproof properties can be obtained, and a rust prevention effect can be exhibited. Further, when the backing layer is composed of a plurality of layers, it is preferable that at least one layer is the air-impermeable layer. Furthermore, when the backing layer is composed of a plurality of layers, at least one of them can be formed of a nonwoven fabric or the like.

(1) Preparation of mixed activated carbon Each activated carbon was mixed so that it might become the combination shown in Table 1 (the total amount of activated carbon is 100 mass%), and mixed activated carbon AC1-AC11 was obtained.

The following products were used as the activated carbons.
First impregnated activated carbon (1); manufactured by Nippon Enviro Chemicals Co., Ltd., product name “Shirakaba GAA”
Second impregnated activated carbon (21); Potassium carbonate-impregnated activated carbon with an addition amount of 5% by mass Second impregnated activated carbon (22); Potassium carbonate impregnated activated carbon Second impregnated activated carbon (24); Potassium carbonate impregnated activated carbon with an addition amount of 20% by weight Second impregnated activated carbon (25); Potassium carbonate impregnated activated carbon with an impregnation amount of 25% by mass Non-added activated carbon (3); Nippon Enviro Chemicals Product name "Shirakaba G2c"
In addition, the activated carbon of the adhesion base material of the second impregnated activated carbon (21) to (25) is the same as the non-implanted activated carbon (3).

(2) Preparation of Latex Each of the mixed activated carbons AC1 to AC11 is added to and mixed with latex (acrylic resin aqueous emulsion, solid content concentration 50% by mass, pH 8.5), and water containing mixed activated carbon and latex. A dispersion was prepared. The blending of each mixed activated carbon and latex was such that the total amount of the mixed activated carbon and the solid content of the latex was 100 mass%, the mixed activated carbon was 40 mass%, and the solid content of the latex was 60 mass%.

(3) Manufacture of test skin materials (3-1) Test skin materials CP1 to CP11
A non-woven fabric having a basis weight of 350 g / m ² (the surface was raised with a needle punch) was used as the skin layer. The foamed latex obtained by foaming each latex (acrylic resin aqueous emulsion, solid content concentration 50 mass%) prepared above on the back surface (the side not brushed) of this skin layer is 100 g / in terms of solid content in a roll coater. It was coated at a coat weight of m ^2. Then, it dried at 170 degreeC for 5 minutes, the sealing layer was formed, and the laminated body by which the sealing layer was laminated | stacked on the back surface side of the skin layer was obtained. An olefin resin (polyethylene) was directly extruded into a film shape and roll-bonded to the side of the sealing layer of this laminate using a T-die melt extruder. Furthermore, after that, molding heating is performed at 180 ° C. for 2 minutes, cooling, and skin materials CP1 to CP11 having a non-breathable backing layer (the total content of mixed activated carbon in each skin material is 40 g / m ² ). Got.

(3-2) Skin material CP12 for testing
On the back surface of the skin layer 11 formed by tufting (floating) the pile yarn 112 on the base fabric layer 111, the latex containing the previously prepared mixed activated carbon AC7 (acrylic resin aqueous emulsion, solid content concentration 50 mass%) is foamed. Coating the foamed latex with a roll coater at a solid content mass conversion of 60 g / m ² (ie, the latex solid content is 30 g / m ² and the mixed activated carbon AC7 is applied at 30 g / m ² ). did. Then, it was made to dry for 5 minutes at the temperature of 170 degreeC, the sealing layer 12 was formed, and the laminated body by which the sealing layer 12 was laminated | stacked on the back surface side of the skin layer 11 was obtained. A non-breathable first backing layer 131 was formed on the side of the sealing layer 12 of this laminate in the same manner as (3-1). Furthermore, the 2nd backing layer 132 is laminated | stacked on the back surface side of this 1st backing layer 131, the backing layer 13 is formed, and the skin material CP12 of this invention (the front and back does not have ventilation | gas_flowing, the total content of mixed activated carbon is 30g. / M ² ).

In the skin material CP12, the base fabric layer 111 is a nonwoven fabric having a basis weight of 100 g / m ² . Further, the pile yarn 112 is planted in the base fabric layer 111 with a basis weight of 450 g / m ² . The first backing layer 131 is made of polyethylene and has a basis weight of 350 g / m ² . Furthermore, the 2nd backing layer 132 is comprised from a nonwoven fabric, and the fabric weight is 15 g / m < ² >.

(3-3) Skin material CP13 for testing
Latex (acrylic resin water system) containing the previously prepared mixed activated carbon AC7 on the back surface of the skin layer 11 formed by planting the pile yarn 112 on the laminate obtained by bonding the base fabric layer 111 and the sound absorbing layer 114 via the adhesive layer 113 A foamed latex obtained by foaming an emulsion and a solid content concentration of 50% by mass is coated on a roll coater at a solid content mass conversion of 60 g / m ² (ie, the latex solid content is 30 g / m ² , and the mixed activated carbon AC7 is 30 g / m ² . It becomes the conversion which is coated with m ² ). Then, it was made to dry for 5 minutes at the temperature of 170 degreeC, the sealing layer 12 was formed, and the laminated body by which the sealing layer 12 was laminated | stacked on the back surface side of the skin layer 11 was obtained. A non-breathable first backing layer 131 was formed on the side of the sealing layer 12 of this laminate in the same manner as (3-1). Furthermore, the 2nd backing layer 132 is laminated | stacked on the back surface side of this 1st backing layer 131, the backing layer 13 is formed, and the skin material CP13 of this invention (the front and back does not have ventilation | gas_flowing, the total content of mixed activated carbon is 30g. / M ² ).

In the skin material CP13, the base fabric layer 111 is a nonwoven fabric having a basis weight of 80 g / m ² . Further, the pile yarn 112 is planted in the base fabric layer 111 with a basis weight of 550 g / m ² . Furthermore, the sound absorbing layer 113 is a nonwoven fabric with a basis weight of 300 g / m ² , and the adhesive layer 114 is made of a polyethylene film and has a basis weight of 18 g / m ² . The first backing layer 131 is made of polyethylene and has a basis weight of 350 g / m ² . Furthermore, the 2nd backing layer 132 is comprised from a nonwoven fabric, and the fabric weight is 15 g / m < ² >.

(4) Deodorization test 1 (Measurement of residual concentration after 1 hour)
Each skin material obtained by said (1)-(3) was cut | judged to 100 mm x 80 mm, and it was set as the test piece. Next, each test piece was put into a gas bag (GL Science Co., Ltd.) having a volume of 10 liters, and 4 liters (temperature 35 ° C.) of 100 ppm each of the test gases {acetic acid, toluene, acetaldehyde} shown in Table 2 Injected to form an environment containing each test gas. And the density | concentration of each test gas of the density | concentration after progress for 1 hour after inject | pouring was measured using the detection tube type measuring device (made by Gastec Co., Ltd.). For the measurement of each test gas, a detector tube corresponding to each test gas described in Table 2 was used. The results are shown in Table 2.

(5) Deodorization test 2 (Measurement of re-release concentration by heating)
After the deodorization test 1 of (4) above, all the gas in the gas bag was removed, and then 4 liters of nitrogen gas was injected. Subsequently, after maintaining at 80 ° C. for 2 hours, the concentration of each test gas was measured using a detector tube type measuring instrument (manufactured by Gastec Co., Ltd.). For the measurement of each test gas, a detector tube corresponding to each test gas described in Table 2 was used. The results are shown in Table 2.

  In addition, in this invention, it can restrict to what is shown to said specific Example, It can be set as the Example variously changed within the range of this invention according to the objective and the use.

  The skin material of the present invention is suitably used as a skin material for various equipment and interior parts in automobiles, railway vehicles, ships, aircraft, indoors, and the like. Among these, it is suitably used as a car carpet for automobile use. That is, for example, it can be widely used as a floor carpet and an article carpet, and among these, it is suitable as a floor carpet. In addition, other examples include indoor carpets, chair skins, tatami mats, and curtains.

10; skin material,
11; skin layer, 111; base fabric (base fabric layer), 112; pile yarn, 113; adhesive layer, 114; sound absorbing layer,
12; Sealing layer, 121; Organic polymer component, 122; First impregnated activated carbon, 123; Second impregnated activated carbon,
13; backing layer, 131; first backing layer, 132; second backing layer.

Claims (5)

A skin material comprising a sealing layer and a skin layer laminated on one side of the sealing layer,
The sealing layer includes a first impregnated activated carbon and a second impregnated activated carbon,
In the first impregnated activated carbon, an amine-based material is impregnated with activated carbon.
The second impregnated activated carbon has an alkali metal carbonate adhering to the activated carbon,
The skin material, wherein the second impregnated activated carbon has a ratio of alkali metal carbonate of 10 to 25% by mass when the total amount is 100% by mass.   The skin material according to claim 1, wherein the second impregnated activated carbon is contained in an amount of 25 to 75 mass% when the total of the first impregnated activated carbon and the second impregnated activated carbon is 100 mass%.   The skin material according to claim 1 or 2, further comprising a backing layer on the other surface side of the sealing layer.   4. The skin layer according to claim 1, wherein the skin layer includes a base fabric layer, an adhesive layer, and a sound absorbing layer in this order, and the sound absorbing layer is laminated on one surface side of the sealing layer. Skin material.   The skin material according to claim 3, wherein the backing layer includes a plurality of layers.

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