JPH07112728B2 - Sheet material and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sheet material having excellent odor absorption and a method for producing the same.

[Conventional technology]

Conventionally, the sheet materials used in the past, especially interior materials for interior use, are mainly aimed at obtaining a decorative effect based on their design after being mounted, and further, workability at the time of mounting, surface strength at the time of use, and other physical properties. It was intended to improve the physical properties.

In recent years, sheet materials have been produced in which effects such as dew condensation prevention and air permeability are individually imparted, but these are merely subordinately imparted.

On the other hand, a fireproof material in which at least one of a glassy substance, an asbestos substance and mountain bark is blended in the foamable coating layer (JP-A-51).
-88898) and a resin porous body (for example, Japanese Patent Application Laid-Open No. 49-105871) in which a fork-chain structure type clay mineral is blended in a thermoplastic resin are known. ,
Although it can provide fireproofness and flame retardancy, it does not have performance such as workability and decorativeness as an interior material for indoor use.

On the other hand, recently, there is a strong tendency to avoid the smoke and odor of cigarettes in a narrow space such as indoors or automobile interiors.Therefore, a container containing a deodorant is placed or a purifying device is installed, but the former is not effective. This is not sufficient, and the latter has the disadvantages that the cost is increased due to the installation of a separate device, and the indoor space is narrowed.

[Problems to be Solved by the Invention]

The present invention does not use a separate device such as a purifying device in eliminating odors in an automobile or a small room, and imparts odor absorbing performance to the interior decoration material itself for interior decoration, and a sheet material excellent in odor absorption property and It is to provide the manufacturing method.

[Means for Solving the Problems]

That is, in the first aspect of the present invention, a vinyl chloride resin layer containing a hydrous magnesium silicate clay mineral (hereinafter referred to as clay mineral) is formed on the surface of a sheet-shaped substrate (hereinafter referred to as substrate). The second invention is a sheet material excellent in odor absorption, and a second invention is that a thermoplastic resin intermediate layer containing a clay mineral is formed between a base material and a vinyl chloride resin layer containing a clay mineral. It is a sheet material excellent in odor absorption in which a large number of fine pores formed in the thickness direction are formed in at least the vinyl chloride resin layer of the sheet material.

The third invention of the present invention is to coat a vinyl chloride resin with a plasticizer, a filler and a clay mineral, heat the mixture to a temperature not lower than the melting point of the vinyl chloride resin, and knead the mixture to obtain a base material coating resin. It is a method for producing a sheet material having excellent odor absorption, which comprises a resin adjusting step and a laminating step of laminating the coating resin obtained in the coating resin adjusting step on the surface of a sheet-shaped substrate. Further, a second invention is a base material forming step of applying a thermoplastic resin coating material containing a clay mineral onto a base material and drying it to form a resin coating material coating base material, a plasticizer and a filler for vinyl chloride resin. And a clay mineral are mixed, heated to a temperature equal to or higher than the melting point of the vinyl chloride resin, and kneaded to form a resin for coating the base material, and a coating resin obtained in the coating resin coating step, A laminating step of laminating on the thermoplastic resin layer of the sheet base material obtained in the base material forming step, and a plurality of fine particles in the thickness direction of the resin layer in at least the resin layer of the laminate obtained in the laminating step. It can be manufactured by a hole forming step of forming a different hole.

The present invention comprises the above-mentioned constitution,
A more detailed description will be given below.

The clay mineral used in the present invention is a clay mineral containing hydrous magnesium silicate as a main component and having a highly reactive hydroxyl group on its surface. The clay mineral has a diameter of 0.005 to 0.6 μm.
Pores with a rectangular cross section of about 10 × 6Å or 6 × 6Å parallel to the fibers.
Are present and have the property of absorbing and releasing moisture in the air. Further, the broken portion of the pore (channel) functions as a receiving portion for the odorous gaseous substance, has the property of absorbing the odorous gaseous substance in the air, and also absorbing and releasing moisture and the like. In addition, in the clay mineral, a part of magnesium may be replaced with aluminum, iron, sodium, nickel or the like.

Specifically, Sepiolite, Falcondoite or Palygorskite
skite), white tile, raffinite or sepiolite (M
eers-chaum) etc. are used alone or in combination of two or more. Also commonly known as Mountain colk, Mountain wood, Mountain leather.
ountain leather), Attapulgite
Etc. correspond to this. The clay mineral may be used in any form of powder, granules or plates, but it is pulverized to such an extent that the pores having the clay mineral remain and pass through a JIS standard 300 mesh sieve. The pulverized product is preferably an aggregate of fine crystals having a length of 10 μm or less and an aspect ratio (fiber length / fiber diameter) of 100 or less. The pulverization is performed by a mixer, a ball mill, a vibration mill. Wet milling or dry milling using a pin mill, a beating machine, or the like. The clay mineral normally retains various forms of water called adsorbed water, adsorbed water, zeolite water, bound water or structured water.

In the present invention, in particular, the above-mentioned clay mineral is used by removing its water content in advance and only having a water content of 5% by weight or less is used. This is because when the water content exceeds 5% by weight, the water content is vaporized during the formation and processing of the sheet material of the present invention, and the resin layer becomes inhomogeneous, so that the intended product cannot be obtained.

The sheet material of the present invention is manufactured as follows. That is, the first invention may be formed into a colored or non-colored sheet by heating and softening the resin layer into a substrate, and the second invention is an intermediate resin containing the clay mineral in the substrate. After the formation of the layer, the above resin layer is further formed on the upper surface of the sheet to form a sheet, and a printed pattern and an embossed pattern are provided on the surface of the sheet.

Next, in the formed sheet, the second invention, that is, the second invention formed by interposing an intermediate resin layer between the substrate and the resin layer, and the sheet in which the resin layer is formed on the substrate A sheet is provided with a sheet material of the present invention by providing a large number of fine holes using a piercing device such as a needle roll having a clearance or a flat plate provided with a large number of thin metal needles.

In the present invention, first, the above resin layer is heat-softened and laminated on a sheet-shaped substrate such as paper, flame-retardant paper, non-woven fabric, woven fabric and knitted fabric.

The amount of the clay mineral used in the resin layer is 5 to 50 parts by weight, preferably 10 to 40 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If it is less than 5 parts by weight, the effects of odor absorption and hygroscopicity are insufficient, and if it exceeds 50 parts by weight, the above-mentioned various effects increase, but due to the peculiar structure of the clay mineral, it has a processing slippage during the processing of the layer. And heat resistance are reduced, which is not preferable. For this reason, it is preferable to use the clay mineral after mixing it with the resin composition and aging it for a certain period of time so that the plasticizer in the composition is sufficiently contained in the clay mineral. By doing so, the clay mineral is uniformly and sufficiently dispersed in the resin layer at the time of forming and processing, it is possible to eliminate the above-mentioned defects, improve defects during processing such as scraping, and also have the various functional effects. Can be sufficient. As a method of forming the resin layer, a calendar method, a coating method,
Although various methods such as an extrusion method can be used, the calender method is preferable in terms of mass productivity and production cost. Further, as the above-mentioned coating method, a solid coating method using a knife coater, a bar coater, a reverse roll coater, a rotary or a gravure printing machine, or the like can be applied. In this method, in addition to a method of directly coating the resin layer on the base material, coating on a release material is performed, and the material is immediately bonded to the base material after heat gelation, or bonded via an adhesive layer, and then released. The mold material is peeled off to obtain a product.

Whichever method is used, the thickness of the resin layer is 0.
05 mm to 1.0 mm is preferable, and if it is less than 0.05 mm, problems with physical strength tend to occur, and if it exceeds 1.0 mm, it is tough and there is no problem with physical strength, but it is heavy in weight and used as various interior materials. When it is used, it becomes difficult to mount and sew, which causes a problem in construction, which is not preferable.

The resin layer does not have to be non-porous, and may be a polymorphic substance produced by a method using a chemical foaming agent, a reactive gas, mechanical stirring or the like. In this case, a non-porous layer having the same composition as the above resin layer may be laminated on the porous resin layer. The thickness of the porous resin layer is 0.05 to 3.0 m
If m is less than 0.05 mm, weight reduction due to being porous, flexibility, and good texture will be lost, and if it exceeds 3.0 mm, workability such as mounting and sewing will be difficult, and strength will be a problem. Is likely to occur, which is not preferable.

When the non-porous resin layer is laminated on the porous resin layer, the thickness of the layer is optimally from 0.05 to 0.50 mm, and if it is less than 0.05 mm, there is a problem of strength, and if it exceeds 0.50 mm. It is not preferable because it becomes heavy, and there is a problem in workability similar to the above when used as an interior material, and the texture becomes hard.

A second invention of the present invention is a sheet material in which an intermediate resin layer is interposed between the base material and the resin layer as described above. In this case, the paint used for the intermediate resin layer is a heat containing the clay mineral. Use an aqueous type or solvent type of a plastic resin. Further, the amount of the clay mineral mixed in the paint is preferably 50 to 150 parts by weight with respect to 100 parts by weight of the resin solid content of the paint, and if less than 50 parts by weight, it is bonded to the base material and the resin layer as an upper layer thereof. However, the above-mentioned various functional effects are insufficient, and
If the amount exceeds 0 parts by weight, the above-mentioned various effects will be sufficient, but the bondability with the above-mentioned two will be weakened, and the film strength will be unfavorably unusable.

As a method for forming the intermediate resin layer, a coating method such as a knife coater, a bar coater, a reverse roll coater, a rotary screen or a solid coating method using a gravure printing machine is used. It is preferable to use a solid coating method for a screen or a gravure printing machine. This is because if the coating material penetrates into the base material, the texture of the product becomes hard and a problem occurs in construction.

By providing the intermediate resin layer as in the second aspect of the invention as described above, the bond between the base material and the resin layer is further strengthened, and the above-mentioned resin is added because the clay mineral is added to the layer. The various functional effects of the layer and the base material can be synergistically increased.

Then, the resin layer surface of the sheet material thus obtained is embossed and / or printed to give a three-dimensional and various design property as a material for interior decoration. In some cases, a surface treatment agent is formed on the surface of the resin layer to form a surface treatment layer.

The formation of the embossed pattern may be before or after the formation of the printed pattern, and the formation of the surface treatment layer may be either before or after the formation of the embossed pattern, and the printed pattern after the formation of the layer. May be given.

The above-mentioned clay mineral is mixed and used in the printing coating material and the surface treatment agent applied to the present invention similarly to the above-mentioned resin layer.
The mixed amount is preferably 50 to 150 parts by weight with respect to 100 parts by weight of the resin solid content of the above both coatings, if it is less than 50 parts by weight the above-mentioned various functionalities cannot be provided, and if it exceeds 150 parts by weight. Although the above-mentioned effect is increased, the film strength is lowered and there is a problem in coatability, which is not preferable.

As a method of shaping the embossed pattern, any method may be used as long as it is an embossing method generally used for thermoplastic resins, but is it a roll embossing method, that is, a method of heating a resin layer and shaping with a cold embossing roll? Alternatively, the embossing method of shaping with a heating embossing roll is efficient and preferable in terms of mass production.

The shape of the embossed pattern of the above-mentioned shape may be any shape, but if possible, it is preferable that the shape has a large uneven step and an extremely high uneven density. This is because the contact surface area with the outside air becomes larger and the above-mentioned various functional effects are increased.

Further, the method for forming the printed pattern is to form the printed pattern by using a gravure printing machine, a screen printing machine, a rotary screen printing machine or the like, or add a more complicated and three-dimensional pattern by using a valley printing machine. Can be done.

As the method for processing the surface treatment agent, a general method for processing the surface treatment agent such as a gravure method, a roll coater method and a knife coater method is used.

Next, in the above-mentioned sheet material on which the resin layer as the intermediate layer is formed, holes are formed after the formation. Specific examples of the method include a method of piercing the sheet material surface with a flat plate provided with a large number of thin metal needles having clearance or a needle roll provided with a large number of metal needles.

By providing the pores, the bad odor and humidity in the outside air have a large contact area and degree of contact with the clay mineral contained in the sheet material, and the odor absorbing property and the moisture absorbing effect are further increased. Because it does. In the first aspect of the invention, a large number of fine pores may be formed to enhance the odor absorbing effect. Further, the void portion may penetrate the resin layer.

Next, as the vinyl chloride resin used in the resin layer of the present invention, in addition to homopolymers of vinyl chloride resin, copolymers of vinyl chloride and vinyl acetate, etc., vinyl chloride and ethylene-vinyl acetate copolymer, vinyl chloride It is also possible to use a graft copolymer with various monomers, and also a mixture of these copolymers and a vinyl chloride homopolymer and a mixture of a vinyl chloride homopolymer and another thermoplastic resin. Further, as these homopolymers, any polymerization method such as suspension polymerization and emulsion polymerization can be used.

In addition, the vinyl chloride resin of the present invention contains DO generally used.
In addition to P, DHP, DIDP, chlorinated paraffin, and other plasticizers and fillers, colorants, stabilizers, lubricants, kerators, etc. are used.
The resin layer may be colored or non-colored, and when it is used as a transparent layer, the kind and addition amount of the material used may be selected and used.

As the resin used for the above-mentioned printing paint and the intermediate resin layer, a vinyl chloride resin, a urethane resin, a polyamide resin, a homopolymer or a copolymer thereof, or a mixture thereof is used in the form of an aqueous and solvent paint. .

〔The invention's effect〕

As described above, according to the first invention and the second invention, a sheet material having an excellent odor absorbing property can be obtained by mixing a clay mineral having an excellent odor absorbing property into the vinyl chloride resin layer or the intermediate layer. Alternatively, when it is used as an interior material for an automobile or the like, the clay mineral in the interior material absorbs a bad odor in the room and can purify the room air without installing any special purification device.

In addition, both the first invention and the second invention have excellent performance as an interior material because they have decorative properties as interior materials and also have physical properties such as tension.

In addition, the method for producing a sheet material having excellent odor absorbing property according to the present invention as in the third invention is the same as the conventional method for producing a synthetic resin sheet-like material or interior material, except that a clay mineral having odor absorbing performance is blended. Since it can be manufactured continuously in a simple manner, the cost can be reduced.

〔Example〕

The drawings show an embodiment of each of the first invention and the second invention. Next, the present invention will be specifically described with reference to the drawings and the following embodiments.

FIG. 1 shows an embodiment of the first invention, in which a sheet material 1 comprises a vinyl chloride resin layer 3 laminated on a surface of a sheet-like base material 2. The fibrous clay mineral 4 is uniformly dispersed in the layer 3.

The vinyl chloride resin layer 3 is appropriately colored or uncolored, and the surface thereof is embossed or printed according to a conventional method. To use it as an interior material, the base material 2 is placed on the interior wall surface or the body side of an automobile. Attach it with adhesive.

The odorous components in the room are absorbed by the clay mineral 4 dispersed in the vinyl chloride resin layer 3, so that the indoor air can be purified.

FIG. 2 shows the sheet material of FIG. 1 provided with holes (the same reference numerals as in FIG. 1 indicate the same members), but the sheet material 5 is the vinyl chloride resin layer 3. The sheet-shaped base material 2 is laminated with the vinyl chloride resin layer 3 having pores 6. The holes 6 are enlarged for easy understanding, and the number of holes 6 is small,
In reality, many fine holes are formed. Therefore, the formation of the voids 6 does not impair the decorativeness of the surface of the vinyl chloride resin layer 3.

By forming a large number of fine pores 6 as described above, the odor in the room is reduced by the clay mineral 4 on the surface of the vinyl chloride resin layer 3.
Not only is odor absorbed by vinyl chloride resin layer 3
The clay mineral in contact with the voids 6 absorbs the odor, and the purification effect can be further enhanced.

Further, FIG. 3 shows an embodiment of the second invention (in FIG. 3, the same reference numerals as those in FIGS. 1 and 2 are the same members), and the sheet material 7 is a sheet-like substrate. A thermoplastic resin intermediate layer 8 is laminated between 2 and the vinyl chloride resin layer 3 containing the clay mineral 4. The clay mineral 9 is uniformly dispersed in the thermoplastic resin intermediate layer 8, and pores 6 that penetrate the vinyl chloride resin layer 3 and reach the intermediate thermoplastic resin layer 8 are formed.

By providing the thermoplastic resin layer 8 of the intermediate layer, the bond between the sheet-shaped substrate 2 and the vinyl chloride resin layer 3 can be further strengthened, and the clay mineral 9 in the thermoplastic resin intermediate layer 8 can be It exhibits an odor absorbing property and can further enhance the odor absorbing effect.

FIG. 4 is an enlarged cross-sectional view of the main part of the sheet material 1 of FIG. 1 with an embossed pattern. The surface area of the vinyl chloride resin layer 3 is shown by the embossed pattern 10 on the surface of the vinyl chloride resin layer 3. The surface contact area with the outside atmosphere is expanded, and the odor absorbing effect can be enhanced.
Although FIG. 4 is an exemplification of the first invention, the same is true of the second invention. Particularly, in the second invention, due to the synergistic effect of the surface area increasing effect and the effect of the hole portion 6, Further, the odor absorbing effect can be further enhanced.

Example 1 A soft vinyl chloride resin composition containing a flame-retardant paper for wallpaper lining as a base material and the clay mineral having the following composition mixed therein was used to prepare about 150
Kneading with a mixing roll at ℃
After forming a beige colored resin layer having a thickness of about 0.2 mm using the calender roll of No. 1, the surface of the layer was subsequently heated using a far infrared heater, resulting in a large unevenness and conspicuousness. An embossing pattern was applied using an embossing roll having a texture pattern to obtain an odor absorbing sheet material.

The obtained odor absorbing sheet material is useful as a wall material decorative interior material having a soft texture and good workability, and the obtained product has the odor absorbing test and the hygroscopic test shown below. In addition, it was confirmed that the functional effects excellent in odor absorption, dew condensation prevention and moisture absorption prevention were exhibited.

[Resin layer composition blending composition]

Vinyl chloride resin (= 1100) 100 parts by weight Clay mineral 30〃 DOP 50〃 Chlorinated paraffin 15〃 Ca-Zn complex stabilizer 2.5〃 Kelator 1〃 Titanium white pigment 15〃 Benzidine yellow 2〃 Calcium carbonate 20〃 Antimony trioxide 5 Comparative Example 1 A sheet material was obtained by using the same composition and processing method as in Example 1 except that the clay mineral material alone was removed from the resin layer resin composition composition of Example 1. The obtained product was similar to the product of Example 1 in terms of texture and workability, but did not have the various functional effects intended by the present invention.

Example 2 A flame retardant paper for wallpaper lining used in Example 1 was mixed with the same clay mineral as in Example 1 to prepare a resin layer-blended composition.
A sheet material having the same structure was prepared by the same method as described above, and then a flat plate having a large number of thin metal needles from its surface was used to provide holes to obtain an odor absorbing material. The obtained product is suitable in terms of feeling and workability as an interior material similar to that of Example 1, and has more excellent effects than Example 1 as shown in the following odor absorption test and hygroscopicity test. It was a thing.

Comparative Example 2 A sheet material having the same structure as in Example 2 was obtained in the same manner as in Example 2 by using the base material of Example 2 and the resin layer containing composition containing no clay mineral. The obtained product did not have the various functional effects intended by the present invention, as in Comparative Example 1.

Example 3 A surface treatment agent coating was prepared by forming the same resin layer on the same substrate as in Example 1 by the same compounding composition and processing method, and mixing the clay mineral having the following compounding composition on the surface of the resin layer. After forming a surface treatment layer on the entire surface using a gravure roll, a printing pattern containing a clay mineral having the following composition is used to apply a small floral print pattern with a gravure printing machine, and then a severe suede pattern with unevenness After producing the sheet material by applying embossing using the squeezing roll of
By the same method as in Example 2, pores were added from the surface of the sheet material to obtain a product. The obtained product was more rich in design than Example 2, and the following odor absorption test,
As shown in the hygroscopicity test, it had the same excellent various functional effects as in Example 2.

(1) [Coating composition for surface treatment] Water-based acrylic surface-treating agent coating (resin solid content 13% by weight) 100 parts by weight clay mineral 13 〃 (2) [Compounding composition for printing coating] Solvent-based acrylic printing Paint (resin solid content 15% by weight) 100 parts by weight Clay mineral 15 〃 Titanium white pigment 12 〃 Watching red pigment 2 〃 Example 4 Clay mineral having the following composition as an intermediate resin layer on the base material used in Example 1 The water-based resin coating composition mixed with was coated using a rotary screen so that the coating amount after drying was 30 g / m ² .

[Intermediate resin coating composition] Aqueous acrylic resin coating (13% by weight of solid resin content) 100 parts by weight Clay mineral 13 〃 Then dried in a hot air drying oven at a temperature of 130 ° C for 2 minutes to form an intermediate resin layer .

Next, the same resin mineral resin mixture composition as in Example 1 containing the same clay mineral as that used in Example 2 was processed in the same manner as in Example 2 to form a sheet material. Then, a hole was attached to obtain a product. The product obtained is in Example 2.
Similar to the above, the texture and workability were good, and, as shown in the following odor absorption test and hygroscopicity test, it had various operational effects superior to those of Example 2.

[1] [Odor absorbing test] (1) (Test method 1) Ammonia gas in cigarette smoke Amount of ceiling 91L (450mm × 450mm × 450mm) ), Room temperature 2
Using a box at 4 ° C, put a commercially available filter-tipped cigarette (length of leaf portion: 30 mm) in the box, ignite it, and extinguish the cigarette, and then 30 minutes, 60 minutes and 90 minutes. After a minute, the concentration of ammonia in the box was measured with a detector tube. After the measurement, the front of the box was opened and the state of smoke was visually inspected. At the same time, the degree of odor was sensory-evaluated to obtain an evaluation for cigarette smoke.

(Ammonia content in one cigarette smoke is 80ppm) (2) (Test method 2) vs. high concentration ammonia gas Room temperature 24 ° C using the same box as above (Test method 1)
1.0 ml of a 5.6% concentration aqueous ammonia solution was dropped into the box, and after 30 minutes, 60 minutes, and 90 minutes, the ammonia concentration in the box was measured in the same manner as in the above (Test Method 1) to obtain a high concentration. An evaluation for ammonia gas was obtained.

[2] [Hygroscopicity test] (Test method) In accordance with the test method of JASS 23M-102, the test material (150 mm
(× 150 mm), the acrylic resin plate cut to the same size as the test material was bonded to the test material using a vinyl acetate resin-based adhesive, dried in a desiccator for 24 hours, and dried. After measuring the weight of the bonding material, immediately after leaving it for 6 hours in a constant temperature and humidity chamber adjusted to a temperature of 50 ° C. and a humidity of 98%, the weight of the bonding material is measured, and the weight before and after the standing is determined, The hygroscopicity value was calculated using the following formula. The hygroscopicity indicates that the larger the value is, the more excellent the hygroscopicity is.

(test results)

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the first invention, and FIG.
FIG. 3 is a cross-sectional view of the sheet material in which holes are provided, FIG. 3 is a cross-sectional view of an embodiment of the second invention, and FIG. 4 is an enlarged cross-sectional view of an essential portion of the embossed embodiment of FIG. It is a figure. 1,5,7 ... Sheet material, 2 ... Sheet-like substrate, 3 ... Vinyl chloride resin layer, 4,9 ... Clay mineral, 6 ... Vacancy part, 8
...... The thermoplastic resin intermediate layer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shoji Sugiura, Shoji Sugiura, Aichi Prefecture, Nagakute Town, Aichi Prefecture, No. 41, Yokosuka, Yokoshiro Central Research Institute Co., Ltd. (72) Inventor, Mitsumasa Horii, Aichi Prefecture, Nagakute Town 1 in 41, Yokomichi, Nagatoji, Central Research Institute, Toyota (72) Inventor, Shoji Akimoto, 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation, (72) Inventor, Atsunori Kinoshita, 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (9)

[Claims] 1. A sheet material excellent in odor absorption, wherein a vinyl chloride resin layer containing a hydrous magnesium silicate clay mineral is laminated on the surface of a sheet-shaped substrate. 2. The sheet material having excellent odor absorbing property according to claim 1, wherein the hydrous magnesium silicate clay mineral is sepiolite, palygorskite, silotile or raffinite. 3. A sheet material excellent in odor absorption according to claim 1, wherein at least the surface of the vinyl chloride resin layer is provided with a surface area enlarging means. 4. The sheet material excellent in odor absorption according to claim 1, wherein the sheet material has a large number of fine pores formed at least in the vinyl chloride resin layer in the thickness direction. . 5. A thermoplastic resin intermediate layer containing a hydrous magnesium silicate clay mineral is formed between a sheet-shaped substrate and a vinyl chloride resin layer containing a hydrous magnesium silicate clay mineral. A sheet material having excellent odor absorption, which comprises a large number of fine pores formed in the thickness direction of at least a vinyl chloride resin layer of the sheet material. 6. The sheet material excellent in odor absorption according to claim 5, wherein the hydrous magnesium silicate clay mineral is sepiolite, palygorskite, silotile or laffinite. 7. The sheet material excellent in odor absorption according to claim 5, wherein at least the surface of the vinyl chloride resin layer is provided with surface area enlarging means. 8. A coating resin for mixing a vinyl chloride resin with a plasticizer, a filler and a hydrous magnesium silicate clay mineral and heating the mixture to a temperature not lower than the melting point of the vinyl chloride resin to knead it to form a resin for coating a sheet base material. A method for producing a sheet material having excellent odor absorption, which comprises an adjusting step and a laminating step of laminating the coating resin obtained in the coating resin adjusting step on the surface of a sheet-shaped substrate. 9. The method for producing a sheet material having an excellent odor absorption property according to claim 8, wherein the hydrous magnesium silicate clay mineral is sepiolite, palygorskite, silotile or raffinite.