JP5465862B2 - Vehicle seat and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vehicle seat and a method for manufacturing the same.

  Urethane foam mainly used as a cushion pad for a seat or the like generates formaldehyde, acetaldehyde, etc., which are one type of VOC13 substance. In automobile seats, the movement to reduce volatile organic compounds (VOC) has started voluntarily, and as a countermeasure, aldehyde catcher agent (gas adsorbent) is applied to the cushion pad. Yes.

  Recently, for the purpose of improving pad manufacturing efficiency, a sheet-like auxiliary material with a catcher agent attached is placed in a mold and subjected to foam molding. A manufacturing method has been proposed (see, for example, Patent Document 1).

JP 2008-80627 A

  However, according to the study by the present inventors, it has been found that the pad described in Patent Document 1 does not provide a VOC reduction effect commensurate with the amount of gas adsorbent used, and the amount of acetaldehyde generated from the pad is still large. doing.

  The present invention has been made in view of the above circumstances, and provides a vehicular seat in which generation of VOC is suppressed more than before even when a cushion pad made of urethane foam is provided, and a method for manufacturing the same. With the goal.

In order to solve the above problems, a vehicle seat according to the present invention includes a cushion pad made of a foamed resin molded body, a support member for supporting the cushion pad, and interposed between the cushion pad and the support member. An anti-noise sheet for preventing the generation of abnormal noise, and the anti-noise sheet is attached to the base material in the form of a sheet of resin film, nonwoven fabric, woven fabric, knitted fabric or paper And a gas adsorbent obtained by supporting an organosilicon compound having an amino group and / or imino group on a carrier and neutralizing part or all of the amino group and / or imino group with an acid. The noise prevention sheet is not integrated with the cushion pad and is interposed between the cushion pad and the support member.

  In the present specification, the noise-preventing sheet is integrated with the cushion pad when 70% or more of the area of one side of the noise-preventing sheet is bonded to the cushion pad by integral foam molding or an adhesive. Means that

  The vehicular seat of the present invention has the above-described configuration, and thus, even when a cushion pad made of urethane foam is provided, it is integrally foam-molded as described above, and a pad on which one side of the auxiliary material is entirely bonded The occurrence of VOC can be suppressed as compared with a conventional seat including the above.

  The reason why the above effect is obtained is that the above-mentioned specific noise prevention sheet is used, and it is not integrated with the cushion pad, so that the adsorption ability of the gas adsorbent by reaction with the isocyanate of the adhesive or urethane raw material In addition to being able to prevent obstruction, it is possible to effectively utilize the gas adsorption surface area of the noise-preventing sheet to which the gas adsorbent has adhered, and to facilitate the flow of air, thereby achieving a high level of adsorption. It is thought that performance can be obtained.

In the vehicle seat of the present invention, from the viewpoint of improving gas adsorbability and heat resistance, the gas adsorbent carries an organosilicon compound having an amino group and / or imino group on a carrier, and the amino group and / or Ru der those obtained by neutralizing a part or all of the imino group with an acid.

Further, the gas adsorbent comprises an organic silicon compound having an amino group and / or imino group supported on a fine particle carrier, and a part or all of the amino group and / or imino group is composed of carbonic acid, formic acid and acetic acid. It is preferably obtained by neutralization with at least one acid selected from the above. This gas adsorbent is more excellent in the adsorption performance of acidic malodorous gases such as acetic acid and aldehyde-based malodorous gas, and more excellent in heat resistance with a sufficiently small decrease in gas adsorption performance due to heat. Thereby, generation | occurrence | production of VOC and a bad smell is further suppressed, and it becomes possible to implement | achieve the vehicle seat which can maintain it over a long term.

In addition, the gas adsorbent is less likely to generate rust when in contact with a metal than an amine salt-based gas adsorbent that is neutralized with an inorganic salt such as hydrochloric acid that does not have the above-described configuration. Even when the support member includes a metal material that easily rusts, a sufficient amount of the gas adsorbent can be contained in the noise prevention sheet, and generation of VOC can be suppressed.

  Furthermore, the gas adsorbent is more effective than the organic silicon compound-based gas adsorbent supported on the carrier having a large particle diameter and the inorganic gas adsorbent having a large particle diameter. Since there is little powder fall-off, the influence on the manufacturing environment is small, and the vehicle seat can be made easier to manufacture.

  Furthermore, the carrier is preferably silica. In this case, it becomes easy to secure a sufficient amount of the organosilicon compound having an amino group and / or imino group, and it becomes easier to obtain a higher level of gas adsorption performance, thereby further suppressing the occurrence of VOC. A vehicle seat can be realized.

  In the vehicle seat of the present invention, the noise prevention sheet may be a bag, and the support member or the cushion pad may be accommodated in the bag. Such a vehicle seat can achieve a high level of suppression of VOC generation and manufacturing efficiency of the vehicle seat.

The present invention also provides a cushion pad made of a foamed resin molded body, a support member for supporting the cushion pad, and interposed between the cushion pad and the support member for preventing the generation of abnormal noise due to friction. A method for manufacturing a vehicle seat comprising an abnormal noise prevention sheet, comprising a sheet-like base material made of a resin film, a nonwoven fabric, a woven fabric, a knitted fabric or paper , and an amino group and / or imino attached to the base material An anti-noise sheet comprising a gas adsorbent obtained by supporting an organosilicon compound having a group on a carrier and neutralizing part or all of the amino group and / or imino group with an acid is prepared. And the manufacturing method of the vehicle seat which interposes between the said cushion pad and the said supporting member without integrating the sheet for noise prevention in the said cushion pad is provided.

  According to the vehicle seat manufacturing method of the present invention, even when a cushion pad made of urethane foam is provided, it is provided with a pad that is integrally foamed as described above and one side of the secondary material is bonded to the entire surface. Compared to a conventional seat, a vehicle seat in which the occurrence of VOC is suppressed can be obtained.

  The reason why the above effect can be obtained is that the use of the above-mentioned sheet for preventing abnormal noise and the integration of the sheet with the cushion pad make it possible to adsorb the gas adsorbent by the reaction with the adhesive or the isocyanate of the urethane raw material. In addition to being able to prevent obstruction, it is possible to effectively utilize the gas adsorption surface area of the noise-preventing sheet to which the gas adsorbent has adhered, and to facilitate the flow of air, thereby achieving a high level of adsorption. It is thought that performance can be obtained.

In the vehicle seat manufacturing method of the present invention, from the viewpoint of improving gas adsorption and heat resistance, the gas adsorbent carries an organosilicon compound having an amino group and / or imino group on a carrier, and Ru der those obtained by some or all of the amino and / or imino groups is neutralized with an acid.

Further, the gas adsorbent comprises an organic silicon compound having an amino group and / or imino group supported on a fine particle carrier, and a part or all of the amino group and / or imino group is composed of carbonic acid, formic acid and acetic acid. It is preferably obtained by neutralization with at least one acid selected from the above. This gas adsorbent is excellent in the adsorption performance of acidic malodorous gas such as acetic acid and aldehyde-based malodorous gas, and excellent in heat resistance with a sufficiently small decrease in gas adsorption performance due to heat. Thereby, generation | occurrence | production of VOC and a bad smell is further suppressed, and the vehicle seat which can maintain it over a long term can be obtained.

In addition, the gas adsorbent is less likely to generate rust when in contact with a metal than an amine salt-based gas adsorbent that is neutralized with an inorganic salt such as hydrochloric acid that does not have the above-described configuration. Even when the support member includes a metal material that easily rusts, a sufficient amount of gas adsorbent can be contained in the noise prevention sheet, and a vehicle seat in which the occurrence of VOC is suppressed can be easily obtained. it can.

  Furthermore, the gas adsorbent is more effective than the organic silicon compound-based gas adsorbent supported on the carrier having a large particle diameter and the inorganic gas adsorbent having a large particle diameter. Since there is little powder fall, the influence on the manufacturing environment of a vehicle seat can be made small.

  Furthermore, the carrier is preferably silica. In this case, it becomes easy to secure a sufficient amount of the organosilicon compound having an amino group and / or imino group, and it becomes easier to obtain a higher level of gas adsorption performance, thereby further suppressing the occurrence of VOC. A vehicle seat can be obtained.

  In the vehicle seat manufacturing method of the present invention, the noise prevention sheet is a bag, and the noise prevention sheet is cushioned by accommodating the support member or the cushion pad in the bag. And the support member. In this case, a vehicle seat in which VOC generation is sufficiently suppressed can be efficiently manufactured.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case provided with the cushion pad which consists of urethane foams, generation | occurrence | production of VOC can be provided compared with the conventional vehicle seat and its manufacturing method.

(Vehicle seat)
FIG. 1 is a partially cutaway perspective view showing a configuration of a vehicle seat according to a preferred embodiment of the present invention. A vehicle seat 100 shown in FIG. 1 includes a cushion pad 10 made of a foamed resin molding, and a support member 20 including a seat frame 24 in which a spring material 22 for supporting the cushion pad 10 is assembled. An abnormal noise prevention sheet 30 disposed between the cushion pad 10 and the support member 20 is provided, and these are covered with an exterior material 40. The support member 20 and the cushion pad 10 face each other and are assembled with an abnormal noise prevention sheet 30 interposed therebetween.

  Examples of the cushion pad 10 include those formed of polyurethane foam, polyurethane chip, or the like.

  The noise prevention sheet 30 may be configured to include a sheet-like base material made of a resin film, a nonwoven fabric, a woven fabric, a knitted fabric, or paper, and a gas adsorbent attached to the base material.

  Examples of the material for the resin film include polyethylene, polypropylene, and polyvinyl chloride. Nonwoven fabrics include those made of felt, polypropylene, polyester, nylon, rayon, acrylic, cotton, wool, etc., and flame retardant fibers, deodorant fibers, carbon fibers, antibacterial fibers, conductive fibers, etc. It is done. Examples of the material for the woven fabric and the knitted fabric include polypropylene, polyester, nylon, rayon, acrylic, cotton, and wool. As the nonwoven fabric, a spunbond nonwoven fabric, a needle punched nonwoven fabric, a thermal bond nonwoven fabric, a chemical bond nonwoven fabric, or the like can be used.

  Further, the base material of the noise preventing sheet 30 is preferably a nonwoven fabric in terms of gas adsorption surface area and economy, and in terms of price, noise preventing effect and heat resistance, a polyester nonwoven fabric having a mesh structure. Is more preferable. A commercial item can be used for the nonwoven fabric made from polyester which has a mesh structure.

As thickness of a base material, 0.5-10 mm is preferable at the point of abnormal noise prevention property, texture, price, powder fall-off prevention property, and a deodorizing effect. Further, the basis weight of the substrate is preferably 10 to ²⁰⁰ g / m ^{2 in} terms of noise prevention, texture, price, powder fall prevention, and deodorizing effect.

  As the gas adsorbent to be attached to the substrate, various gas adsorbents can be used as long as they can capture a volatile organic compound (VOC). For example, the compound which has the effect | action which capture | acquires acidic gas and aldehyde gas, such as an inorganic type compound, an amine type compound, an amide type compound, a carbamide type compound, a hydrazide type compound, an amino acid type compound, is mentioned.

  In the present invention, as the gas adsorbent, it is preferable to use a support in which an organic silicon compound having an amino group and / or imino group is supported on a carrier or a product obtained by neutralizing the amino group and / or imino group with an acid. .

  In particular, from the standpoints of gas adsorption to acidic gases such as acetic acid and aldehyde gases, heat resistance, suitability for spray processing, low powder fall-off, resistance to rust when contacted with metal, etc. As the gas adsorbent, an organosilicon compound having an amino group and / or imino group is supported on a fine particle carrier, and a part or all of the amino group and / or imino group is selected from the group consisting of carbonic acid, formic acid and acetic acid. It is preferable to use those obtained by neutralization with at least one acid.

  The gas adsorbent can be obtained, for example, by selecting those that can react and bond with each other as the carrier and the organosilicon compound, reacting them, and neutralizing with the acid. The organosilicon compound is preferably one in which the amino group and / or imino group can be sufficiently present on the support after the reaction with the support.

  As the carrier, a compound having a hydroxyl group can be used from the viewpoint of good reactivity with an organosilicon compound having an amino group and / or an imino group, and activated carbon or a metal oxide having a hydroxyl group can be used. It is preferable to use it. Examples of the metal oxide having a hydroxyl group include silica, alumina, titania, zirconia, and zinc oxide.

  Activated carbon and hydroxyl group-containing metal oxides have their surfaces immersed in alkali such as alkali metal or alkaline earth metal hydroxides, carboxylates, ammonia, aliphatic or aromatic amines, and amino group-containing polymers. It may be subjected to alkali treatment by a method such as

  Among the above carriers, it is preferable to use a metal oxide having a hydroxyl group. In this case, when the gas adsorbent is applied to the substrate to obtain the gas adsorbing material, the influence on the hue of the substrate can be further reduced. Further, silica is particularly preferable because it is rich in hydroxyl groups on the surface and can increase the amount of the organosilicon compound having an amino group and / or an imino group.

  The carrier is preferably particles having an average particle diameter in the range of 1 nm to 5 μm, more preferably particles in the range of 1 nm to 1 μm, still more preferably particles in the range of 1 nm to 500 nm, and ranges of 1 nm to 200 nm. Are most preferred. If the average particle size of the support is less than 1 nm, the ability to support an organosilicon compound having an amino group and / or imino group tends to be poor, and sufficient gas adsorbability tends to be difficult to obtain. Further, even if the average particle diameter exceeds 5 μm, the surface area of the carrier becomes small, and thus there is a tendency that sufficient gas adsorbability is hardly obtained. Furthermore, when the average particle diameter of the carrier is within the above range, it is possible to produce a gas adsorbing material while sufficiently reducing the influence on the hue of the substrate (in particular, suppressing whitening). In addition, when the gas adsorbent is adhered to the substrate, it may be processed by a spray method, but if the average particle size is within the above range, clogging of the spray hardly occurs and the gas adsorbent is sprayed. Suitability can be improved. In the present invention, the average particle diameter means a median diameter of 50% cumulative.

  The organosilicon compound having an amino group and / or imino group is preferably a compound having at least one amino group and / or imino group and a functional group capable of reacting with and binding to the functional group of the carrier. In the case where the carrier has a hydroxyl group, examples of the functional group capable of reacting with the hydroxyl group to bind thereto include -SiOH group and -SiOR group (where R represents a hydrocarbon group, preferably carbon And an alkyl group having a number of 1 to 3).

  Examples of the organosilicon compound having such a functional group include 3-aminopropyltrihydroxysilane, methoxy (3-aminopropyl) dihydroxysilane, ethoxy (3-aminopropyl) dihydroxysilane, and γ-aminopropyltrimethoxysilane. , Γ-aminopropyltriethoxysilane, γ-aminopropylmethyldimethoxysilane, γ-aminopropylmethyldiethoxysilane, γ-aminopropyldimethylethoxysilane, γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ- (2-aminoethyl) aminopropyltriethoxysilane, γ- (2-aminoethyl) aminopropylmethyldimethoxysilane, γ- (2-aminoethyl) aminopropylmethyldiethoxysilane, γ- (2-aminoethyl) aminop Pyrdimethylmethoxysilane, γ- (2-aminoethyl) aminopropyldimethylethoxysilane, γ- (2-aminoethylamino) propyl (isopropoxy) dimethoxysilane, 2- (2-aminoethyl) -3-aminopropyltri Examples include silane coupling agents such as methoxysilane.

  In order to support the organosilicon compound having an amino group and / or imino group on the carrier, for example, the carrier is added to an aqueous solution of the organosilicon compound (usually about 5 to 40% by mass), and at room temperature for 10 minutes to The method of stirring for about 5 hours is mentioned. The amount of the organosilicon compound used is preferably 0.1 to 5 g, more preferably 0.5 to 2 g, relative to 1 g of the carrier.

  In order to neutralize part or all of the amino group and / or imino group with at least one acid selected from the group consisting of carbonic acid, formic acid and acetic acid, for example, the aqueous solution obtained above is adjusted to pH The method of neutralizing by adding one or more of carbon dioxide gas, dry ice, formic acid, and acetic acid until from 1 to 12 to 4 to 10, preferably from 6 to 10 is mentioned. Through such neutralization treatment, an aqueous dispersion containing a gas adsorbent can be obtained. In addition, after neutralization, you may add conventionally well-known components, such as a dispersing agent (preferably nonionic surfactant), a thickener, and antiseptic | preservative, as needed. It is also possible to obtain a powdery gas adsorbent by removing water from the aqueous dispersion.

  In the gas adsorbent, the amino group and / or imino group derived from the organosilicon compound supported on the carrier is neutralized with one or more acids selected from the group consisting of carbonic acid, formic acid and acetic acid. Even when subjected to heat treatment or a heat history over time, it can have excellent heat resistance such that gas adsorbability with respect to acidic gases such as acetic acid and aldehyde gases is sufficiently maintained. Specifically, the gas adsorbability can be sufficiently maintained up to about 5 minutes at 200 ° C. in the case of heat treatment and up to about 100 hours at 100 ° C. in terms of the heat history over time.

  Such excellent heat resistance is advantageous in that the gas adsorbability can be sufficiently maintained even when the temperature of the vehicle becomes high in summer or the like, and the generation of VOC can be suppressed over a long period of time.

  In the case of using strong acid such as hydrochloric acid or sulfuric acid, organic acid such as citric acid or malic acid, etc. as neutralizing acid for neutralizing amino group and / or imino group derived from organosilicon compound supported on carrier The above effects are difficult to obtain. The reason is considered that the neutralized salt is strong, so that the gas adsorbability itself is lowered and the heat resistance due to the deoxidation is hardly exhibited.

  As a method for adhering the gas adsorbent to the substrate, the gas adsorbent is used as it is or by using a dispersion obtained by appropriately diluting or concentrating with a solvent such as water or alcohol, by a known method such as spraying, coating, or kiss roll. The method of apply | coating, the method of immersing, etc. are mentioned. Application by spraying is performed by, for example, a nozzle, a rotor dumper, a hand gun, or the like. Application | coating by coating is performed by a knife, a rotary, a gravure, a screen etc., for example. At this time, a binder may be appropriately added to the gas adsorbent or the dispersion thereof. As the binder, conventionally known binders can be used without particular limitation. For example, polyvinyl alcohol, acrylic emulsion, vinyl acetate emulsion, ethylene-vinyl acetate copolymer emulsion, methyl cellulose, acrylic-ethylene copolymer emulsion, urethane type An emulsion, a silicone emulsion, etc. are mentioned. When applied by coating, thickeners such as guar gum, locust bean gum, tamarind gum, carboxymethyl cellulose, carboxyethyl cellulose, hydroxyethyl cellulose, carboxymethyl starch, carboxyethyl starch, sodium acrylate, and sodium alginate may be added. preferable.

  As described above, when the gas adsorbent is obtained as a dispersion containing a solvent such as water, a powdered gas adsorbent obtained by distilling off the solvent from the dispersion and the binder are mixed. This mixture can be applied to a substrate.

  About the usage-amount of a binder, when there are too many binders, gas adsorption property may fall. Therefore, the amount of the binder used is up to 0.1 g, preferably 0.02 to 0.5 g with respect to 1 g of the gas adsorbent, in order to balance the retention of the gas adsorbent on the base material and the gas adsorbability. It is good to do.

The adhesion amount of the gas adsorbent in the noise preventing sheet according to the present invention is 0.1 to 30 (in terms of solid content) g from the viewpoints of deodorizing property, powder fall-off preventing property, texture, flame retardancy, and economy. / M ² is preferred.

  After the gas adsorbent or its dispersion is applied to the substrate, heat treatment can be performed under appropriate conditions according to the type of substrate and the amount of adsorbed gas adsorbent. For example, natural drying and conditions from room temperature to 220 ° C. for several seconds to several days can be mentioned.

  In addition to the gas adsorbent, the anti-noise sheet according to the present invention adheres, for example, appropriately using conventionally used components such as a flame retardant, an antistatic agent, an antibacterial agent, a softener, and a binder. You may let them.

  In the vehicle seat 100 shown in FIG. 1, the noise prevention sheet 30 according to the present invention cut into a predetermined size is arranged between the cushion pad 10 and the support member 20 as it is. In such an aspect, the noise prevention sheet can be interposed between the cushion pad and the support member without taking a special process.

  In the present invention, regarding the method of interposing the noise prevention sheet between the cushion pad and the support member, the noise prevention sheet is not integrated with the cushion pad, and the noise prevention effect and the generation of VOC are achieved. If the effect to suppress is acquired, it will not be restricted to said aspect but can be changed suitably.

For example, the noise prevention sheet can be interposed between the cushion pad and the support member by the following means.
(1) The noise prevention sheet is locked to the support member or the cushion pad by the locking tool.
(2) Adhering the noise prevention sheet to the support member or the cushion pad partially or linearly with an adhesive (so that the total adhesion area of the noise prevention sheet is less than 50%).
(3) Wrap an anti-noise sheet around a part or the whole of the support member or the cushion pad.
(4) A support member or a cushion pad is accommodated in the bag body of the noise prevention sheet.

  Examples of the locking tool include a fixing pin, a wire, a hook-and-loop fastener, a string, a plastic fastener, sewing, and the like.

  As the adhesive, epoxy, urethane, acrylic and vinyl acetate adhesives can be used. In the present embodiment, the total adhesion area of the noise preventing sheet is preferably 50% or less, more preferably 20% or less, and even more preferably 15% or less.

  It is preferable that the said bag body has a shape which can accommodate a cushion pad or a supporting member, and can cover the circumference | surroundings.

  In the vehicle seat of the present invention, for example, the noise prevention seat according to the present invention may be interposed between the cushion pad constituting the seat back and the support member thereof in the same manner as described above. .

  The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to these examples.

<Preparation of treatment liquid containing gas adsorbent>
(Processing liquid 1)
Addition of 67 g of γ- (2-aminoethyl) aminopropyltrimethoxysilane to 437 g of colloidal silica (Nissan Chemical Co., Ltd., trade name “Snowtex 30”, average particle size 10-20 nm, silica content 30% by mass) The reaction solution was stirred at room temperature for about 2 hours. Next, carbon dioxide gas was blown into the reaction solution until the pH of the reaction solution reached 9, neutralization treatment was performed, 496 g of water was further added, and water dispersion with a gas adsorbent concentration of 20 mass% was added. A liquid (treatment liquid 1) was obtained. The pH of the reaction solution before neutralization was 11.6.

<Preparation of noise prevention sheet>
(Sheet 1)
A spunbonded nonwoven fabric (weight per unit area: 40 g / m ² ) was immersed in the treatment liquid 1 under the condition that the adhesion amount of the gas adsorbent was 2 g / m ² . And the sheet | seat for abnormal noise prevention (sheet | seat 1) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

(Sheet 2)
A spunbonded nonwoven fabric (weight per unit area: 40 g / m ² ) was immersed in the treatment liquid 1 under the condition that the adhesion amount of the gas adsorbent was 5 g / m ² . And the sheet | seat for noise prevention (sheet | seat 2) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

<Preparation of spring receiving sheet>
(Sheet 3)
A spunbonded nonwoven fabric (weight per unit area: 100 g / m ² ) was immersed in the treatment liquid 1 under the condition that the adhesion amount of the gas adsorbent was 2 g / m ² . And the sheet | seat for noise prevention (sheet | seat 3) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

(Sheet 4)
A spunbonded non-woven fabric (weight per unit area: 100 g / m ² ) was immersed in the treatment liquid 1 under the condition that the adhesion amount of the gas adsorbent was 5 g / m ² . And the sheet | seat for noise prevention (sheet | seat 4) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

<Evaluation of aldehyde reduction effect of foamed urethane resin molding>
Example 1
40 parts by mass of tolylene diisocyanate to 100 parts by mass of polyether polyol in a mixture of polyether polyol (GP-3000, manufactured by Sanyo Chemical Industries, Ltd.), water, silicone foam stabilizer and catalyst. The foamed urethane resin molded body produced by blending in proportions was cut into a size of 8 cm × 10 cm wide and 7 cm thick. On the cut-out molded body, the sheet 1 obtained above was cut and cut into 8 cm × 10 cm to obtain a test piece assuming the state shown in FIG.

(Example 2)
A test piece was obtained in the same manner as in Example 1 except that the sheet 2 was used instead of the sheet 1.

(Comparative Example 1)
In the mold in which the sheet 3 obtained as described above is arranged, a polyether polyol (GP-3000 (manufactured by Sanyo Kasei Kogyo Co., Ltd.)), water, a silicone foam stabilizer and a mixed liquid of catalyst and tolylene diisocyanate. Was blended at a ratio of 40 parts by mass with respect to 100 parts by mass of the polyether-based polyol to produce an integrally molded product in which the sheet 3 was bonded to one surface of the foamed urethane resin molded body. It was cut into a size of 8 cm × width 10 cm and thickness 7 cm, and this was used as a test piece.

(Comparative Example 2)
A test piece was obtained in the same manner as in Comparative Example 1 except that the sheet 4 was used instead of the sheet 3.

(Comparative Example 3)
Polyether polyol (GP-3000 (manufactured by Sanyo Chemical Co., Ltd.)), water, a silicone foam stabilizer and a catalyst in a mixed solution of 40 parts by mass of tolylene diisocyanate with respect to 100 parts by mass of the polyether polyol. The foamed urethane resin molded body produced by blending at a ratio was cut into a size of 8 cm × 10 cm wide and 7 cm thick. This was air-dried at 100 ° C. The coating amount of the treatment liquid 1 was set so that the amount of the adsorbed gas adsorbent after drying was 2 g / m ² , thus obtaining a test piece.

(Comparative Example 4)
A test piece was obtained in the same manner as in Comparative Example 3 except that the treatment liquid 1 was spray-coated under the condition that the adhesion amount of the gas adsorbent after drying was 5 g / m ² .

(Reference example)
Polyether polyol (GP-3000 (manufactured by Sanyo Chemical Co., Ltd.)), water, a silicone foam stabilizer and a catalyst in a mixed solution of 40 parts by mass of tolylene diisocyanate with respect to 100 parts by mass of the polyether polyol. The foamed urethane resin molded body produced by blending in proportions was cut into a size of 8 cm × 10 cm wide and 7 cm thick, and this was used as an unprocessed test piece.

  About the test piece obtained by said Example, the comparative example, and the comparative example, the generation amount of the aldehyde was evaluated with the following method. The results are shown in Table 1.

  A test piece was placed in a 10 L Tedlar bag, and 4 L of nitrogen gas was sealed. The Tedlar bag was then heated at 65 ° C. for 2 hours. After heating, 3 L of gas in the Tedlar bag was passed through the aldehyde adsorption column to adsorb aldehydes to the column. Next, the aldehydes adsorbed on the column are eluted with a solvent (acetonitrile), and the eluate is subjected to liquid chromatography (“CLASS-M10A” manufactured by Shimadzu Corporation, measurement wavelength: 360 nm, solvent: acetonitrile / water (55/45). Volume%), injection amount: 10 μl, ODS column), and quantitative analysis was performed.

[Gas adsorption performance of gas adsorbent, evaluation of powder fall and rust generation]
<Preparation of treatment liquid containing gas adsorbent>
(Processing liquid 2)
An aqueous dispersion (treatment liquid) in which a porous powder having an average particle diameter of 5 μm, aminoguanidine hydrochloride, a nonionic surfactant, and a thickener are mixed and dispersed in water, and the concentration of the gas adsorbent is 20% by mass. 2) was adjusted.

(Processing liquid 3)
Colloidal silica having an average particle diameter of 20 nm and aminoguanidine hydrochloride were mixed with water to prepare an aqueous dispersion (treatment liquid 3) having a gas adsorbent concentration of 10% by mass.

(Processing liquid 4)
Adipic acid dihydrazide was dissolved in water to prepare a gas adsorbent aqueous solution (treatment liquid 4) having a gas adsorbent concentration of 5 mass%.

<Preparation of noise prevention sheet>
(Sheet 5)
A spunbonded nonwoven fabric (weight per unit area: 40 g / m ² ) was immersed in the treatment liquid 2 under the condition that the adhesion amount of the gas adsorbent was 2 g / m ² . And the sheet | seat for noise prevention (sheet | seat 5) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

(Sheet 6)
A spunbonded nonwoven fabric (weight per unit area: 40 g / m ² ) was immersed in the treatment liquid 3 under the condition that the adhesion amount of the gas adsorbent was 2 g / m ² . And the sheet | seat for noise prevention (sheet | seat 6) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

(Sheet 7)
A spunbonded nonwoven fabric (weight per unit area: 40 g / m ² ) was immersed in the treatment liquid 4 under the condition that the adhesion amount of the gas adsorbent was 2 g / m ² . And the sheet | seat for noise prevention (sheet | seat 7) was obtained by drying the nonwoven fabric after an immersion process at 120 degreeC for 2 minute (s).

  About the gas adsorbent aqueous dispersion obtained above, the gas adsorbent aqueous solution, and the noise prevention sheet, the gas adsorption performance, the powder fall off, and the degree of occurrence of rust were evaluated by the following methods. The results are shown in Table 2.

(Evaluation of gas adsorption performance based on the amount of aldehyde generated)
Polyether polyol (GP-3000 (manufactured by Sanyo Chemical Co., Ltd.)), water, a silicone foam stabilizer and a catalyst in a mixed solution of 40 parts by mass of tolylene diisocyanate with respect to 100 parts by mass of the polyether polyol. The foamed urethane resin molded body prepared by blending in proportions was cut into a size of 8 cm × 10 cm wide and 7 cm thick.Sheets 1, 5-7 obtained above on the cut molded body The sample was cut into a size of 8 cm × 10 cm, and a test piece assuming the state shown in FIG. 1 was obtained.

  About the obtained test piece, the generation amount of the aldehyde was measured by the above method, and the gas adsorption performance was evaluated in stages by A, B, and C based on the generation amount. In addition, A shows that the generation amount of aldehyde is the smallest and C shows the highest generation amount.

(Evaluation of powder omission)
About the sheet | seats 1 and 5-7 obtained above, it is set as the evaluation of powder omission of a gas adsorbent by visually confirming the degree of powder omission when giving a friction and an impact, and the order with less powder omission is set. I wrote. 1 indicates the least powder fall.

(Evaluation of rust generation)
The treatment liquids 1 to 4 obtained above were sprayed on a small plate made of iron (SPCC-SB) and left for 3 days. Thereafter, the occurrence of rust was visually confirmed. When the occurrence of rust was observed, “Yes”, and when the occurrence of rust was not observed, “No”.

1 is a partially cutaway perspective view showing a configuration of a vehicle seat according to a preferred embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Cushion pad, 20 ... Support member, 30 ... Seat for noise prevention, 40 ... Exterior material, 100 ... Seat for vehicles.

Claims (6)

A cushion pad made of a foamed resin molded body, a support member for supporting the cushion pad, and interposed between the cushion pad and the support member to prevent noise from being generated due to friction. And a seat for
The anti-noise sheet has a sheet-like substrate made of a resin film, nonwoven fabric, woven fabric, knitted fabric or paper , and an organosilicon compound having an amino group and / or an imino group attached to the substrate. And a gas adsorbent obtained by neutralizing part or all of the amino group and / or imino group with an acid ,
The vehicle seat, wherein the noise prevention seat is interposed between the cushion pad and the support member without being integrated with the cushion pad. The vehicle seat according to claim 1, wherein the acid is at least one acid selected from the group consisting of carbonic acid, formic acid, and acetic acid.   The vehicle seat according to claim 1 or 2, wherein the noise prevention sheet is a bag body, and the support member or the cushion pad is accommodated in the bag body. A cushion pad made of a foamed resin molded body, a support member for supporting the cushion pad, and interposed between the cushion pad and the support member to prevent noise from being generated due to friction. And a vehicle seat manufacturing method comprising:
A sheet-like substrate made of a resin film, nonwoven fabric, woven fabric, knitted fabric or paper , and an organosilicon compound having an amino group and / or an imino group attached to the substrate are supported on a carrier, and the amino group and / or A gas adsorbent obtained by neutralizing part or all of the imino group with an acid, and an anti-noise sheet,
A method for manufacturing a vehicle seat, wherein the noise preventing seat is interposed between the cushion pad and the support member without being integrated with the cushion pad. The method for manufacturing a vehicle seat according to claim 4, wherein the acid is at least one acid selected from the group consisting of carbonic acid, formic acid, and acetic acid.   The method for manufacturing a vehicle seat according to claim 4 or 5, wherein the noise prevention sheet is a bag body, and the support member or the cushion pad is accommodated in the bag body.

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