JPH0580342B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a sheet material with excellent odor absorbing properties. [Prior art and its problems] Conventionally, sheet materials such as interior materials and wall covering materials for buildings, vehicles, and other rooms have been made by laminating synthetic resins such as soft vinyl chloride resin on sheet base materials. Commonly used. In particular, when this sheet material is used as an interior material, the surface layer of the sheet material is embossed, printed, matted, etc. to give it decorative properties. In recent years, as living standards have improved, adequate measures have been required to reduce odors, foul odors, etc. in the atmosphere of buildings, vehicles, and other rooms. In a general household, these odors and odors are caused by odors in closed spaces, such as tray odors, closet odors and humidity, garbage odors in the kitchen, and bad breath and body odor in places where large numbers of people gather, such as meeting halls and common rooms. ,
There is a smell of cigarettes, etc. Methods for removing this odor, such as malodor, include spraying or volatilizing adsorbents such as activated carbon or liquid deodorizers, but the deodorizing effect is temporary and does not provide a satisfactory effect. . Attempts have also been made to install purifiers to remove them, but small-sized ones do not produce sufficient effects, and large-sized ones require large-scale equipment, constricting indoor space and increasing costs. Under these circumstances, the development of materials with excellent odor absorbing properties has been strongly desired by society and industry, especially the housing industry. As a material that has this odor-absorbing property, there is an odor-absorbing material in which cellulose fibers are mixed with hydrated magnesium silicate clay minerals (Japanese Patent Application No. 59-259575;
Publication No. 259576, Publication No. 59-259577, Publication No. 59-
259578). [Problems to be Solved by the Present Invention] The above-mentioned odor-absorbing material certainly has excellent odor-absorbing performance, but when used as an interior material, there is a problem that the surface is easily scratched when removing dirt. Therefore, it was not necessarily satisfactory for long-term use as an interior material. The present inventors have conducted intensive research to solve the above-mentioned conventional problems and have conducted various systematic experiments, resulting in the present invention. An object of the present invention is to provide a sheet material that has excellent odor absorbing properties and from which stains on the surface can be easily removed. [Means for Solving the Problems] The first invention provides a sheet base material containing a hydrous magnesium silicate clay mineral (hereinafter referred to as clay mineral);
A sheet material comprising a synthetic resin layer formed on the surface of the base material, the sheet material having a large number of fine pores that penetrate at least the synthetic resin layer in the thickness direction and reach the sheet base material. has a section,
The length of the hydrated magnesium silicate clay mineral is
It is a sheet material that is an aggregate of microcrystals with a size of 10 μm or less and an aspect ratio of 100 or less. Further, a second invention is a sheet material formed of a sheet base material containing clay minerals, a resin paint layer containing clay minerals formed on the surface of the base material, and a synthetic resin layer, comprising: The sheet material has a large number of fine pores extending from the surface layer through at least the synthetic resin layer and the resin paint layer in the thickness direction to reach the sheet base material, A sheet material in which the mineral is an aggregate of microcrystals with a length of 10 μm or less and an aspect ratio of 100 or less. Further, to explain the configurations of the first invention and the second invention in more detail, the sheet base materials of the first invention and the second invention are made of paper, flame-retardant paper, woven fabric, non-woven fabric, knitted fabric, glass cloth, etc. It is a material in which clay minerals are mixed, or a laminate of two or more of them. Furthermore, clay minerals are clay minerals whose main component is hydrated magnesium silicate and which has highly reactive hydroxyl groups on its surface. The clay mineral is composed of fibers with a diameter of about 0.005 to 0.6 μm, and parallel to the fibers there are pores (channels) with a rectangular cross section of about 10 to 6 Å, and the clay mineral itself is resistant to moisture in the atmosphere. It has the property of adsorbing gaseous substances such as odors, malodors, and foreign odors in the atmosphere. In addition, some of the magnesium or silicon in the clay mineral may be replaced with aluminum, iron, nickel, sodium, or the like. Specifically, there are Sepiolite, Xylotile, Loughlinite, Falcondoite, which has hydrated magnesium silicate as its main component, and Palygorskite, which has hydrated aluminum silicate as its main component. One or two of these
It is a mixture of more than one species. Further, these materials may be calcined within a temperature range of 400 to 800°C. Also commonly known as Mountain Cork (Mountain Cork)
cork), Mountain wood,
Minerals such as mountain leather, meerschaum, and attapulgite also fall under this category. This clay mineral may be used in the form of powder, granules, or plates, but it must be crushed to the extent that the pores of this clay mineral remain and that it passes through a JIS standard sieve of 300 mesh. The length is better.
It is an aggregate of microcrystals with a size of 10 μm or less and an aspect ratio of 100 or less. The pulverization at this time is carried out by wet pulverization or dry pulverization using a mixer, ball mill, vibration mill, pin mill, beater, jet mill, or the like. To give a simple example of how clay minerals are mixed into a material, assuming that the material is paper, paper raw materials such as cellulose fibers, the above-mentioned clay minerals, and a water-soluble polymer solution are mixed and paper is made. It is obtained by making paper using a machine and drying it. In this case, the water-soluble polymer solution used is a synthetic polymer latex such as acrylonitrile butadiene latex, styrene butadiene latex, acrylate latex, or vinyl acetate emulsion, or a natural polymer solution such as starch paste. Alternatively, the material sheet may be obtained by simply immersing the material sheet in the above-mentioned mixed solution of the water-soluble polymer solution and clay mineral, or by coating the material sheet with this mixed solution and drying it. In this case, the content of clay mineral in the sheet base material is preferably 10 to 70% by weight. If the content is less than 10% by weight, a sufficient odor absorption effect cannot be obtained, and if the content exceeds 70% by weight, the odor absorption effect is excellent, but the workability is poor and various physical properties such as tensile strength and tear strength are reduced. This is because there is a possibility that the sheet material cannot be put to practical use as a sheet material. Further, the synthetic resin layer of the first invention and the second invention is made of a synthetic resin that softens and can be molded by applying heat, and specifically, polyvinyl chloride, polyvinyl chloride,
Examples include polyamides such as polyvinyl acetate, polyurethane, and nylon, polyethylene, polypropylene, polystyrene, polymethacrylic acid or its ester, polyacrylic acid or its ester, and the like alone or in mixtures, or copolymers thereof. In addition to these, colorants such as dyes and pigments, plasticizers,
Stabilizers and other additives such as fillers and flame retardants may be mixed as necessary. For example, examples of the plasticizer include various esters such as phosphate esters such as TCP (tricresyl phosphate) and adipic esters. In particular, examples of plasticizers for vinyl chloride resin include primary plasticizers such as DOP (dioctyl phthalate), DBP (dibutyl phthalate), and DIDP (diisodecyl phthalate), and secondary plasticizers such as chlorinated paraffin and petroleum plasticizers. In addition, as a stabilizer for vinyl chloride resin,
Examples include Ba-Zn organic composites, Ba-Zn composite soaps, chelators, and epoxidized soybeans. Examples of synthetic resin fillers include talc, clay, silicic anhydride, silica, calcium carbonate, muscovite, mica, silica gel, etc., or those surface-treated with stearic acid, its calcium salts, and surfactants. It will be done. Flame retardants include non-halogen-containing phosphate esters such as TCP, CRP (Tris[dichloropropyl]
Examples include halogen-containing phosphoric acid esters such as phosphate) and tris[2,3 dibromopropyl] phosphate, halogen-containing organic compounds such as chlorinated paraffin, TBE (tetrabromoethane), and inorganic compounds typified by antimony trioxide. It will be done. Furthermore, the resin coating layer of the second invention is a water-based or solvent-based coating of thermoplastic resin impregnated with clay minerals. The thermoplastic resin is a resin that does not inhibit the odor absorbing properties of clay minerals, and specifically, polyacrylic resin, polyvinyl acetate resin, polyurethane resin, etc. alone, a copolymer, or a mixture thereof. be. In this case, the content ratio of clay mineral in the resin paint layer is based on 100 parts by weight of the resin solid content of the paint layer.
50 to 150 parts by weight are preferred. If the content is less than 50 parts by weight, a sufficient effect will not be obtained, and if it exceeds 150 parts by weight, the bonding properties with the sheet base material and/or the synthetic resin layer will be weakened, and the strength of the resin coating layer will be reduced. This is because there is a risk that the product may become unusable. The sheet material of the first invention has a synthetic resin layer laminated on the surface of the sheet base material containing the above-mentioned clay mineral,
Furthermore, a large number of fine pores are formed in the sheet material, penetrating the synthetic resin layer to reach the sheet base material, or even penetrating the sheet base material. Further, a second invention provides a synthetic resin layer in which a resin coating layer containing the above-mentioned clay mineral and a synthetic resin softened by heating above the melting point are laminated on the surface of the sheet base material containing the above-mentioned clay mineral. Furthermore, it is obtained by forming a large number of fine pores extending from the surface layer through at least the synthetic resin layer and the resin paint layer to reach the sheet base material, or even through the sheet base material. As a method for forming the synthetic resin layer, well-known methods such as a calender method, a coating method, and an extrusion method can be used, but the calender method is preferable from the viewpoint of mass production and production cost. Alternatively, the synthetic resin may be heated and softened, a synthetic resin sheet may be preformed by a molding method such as a calendaring method, a coating method, or an extrusion method, and the synthetic resin sheet may be laminated on a sheet base material or a resin paint-coated sheet base material. good. In the case of the coating method, in addition to coating the resin directly on the sheet base material, the resin is coated on the mold release material, and after heating and gelling, it is immediately bonded to the base material or it is bonded with an adhesive, and the mold release material is peeled off. and get it. Further, as a method for forming the resin paint layer, a well-known coating method such as a solid coating method using a knife coater, a bar coater, a reverse roll coater, a rotary screen, or a gravure printing machine can be used. In addition, the pores can be formed by pressing or piercing a needle roll equipped with a large number of thin metal needles from the resin layer surface of the sheet material, or by pressing a flat plate equipped with a large number of thin metal needles into the resin layer of the sheet material. There are methods such as pressing or piercing. Further, in the sheet materials of the first and second inventions, it is preferable that at least the surface resin layer (synthetic resin layer or resin paint layer) is subjected to surface area enlarging means.
That is, by providing the surface resin layer of the sheet material with unevenness by the surface area enlarging means, the contact area with the atmosphere can be increased. As a method for applying this surface area enlarging means, there are methods such as applying an embossed pattern by an embossing method or applying a pattern using a valley printing machine. This expands the surface area of the synthetic resin layer or resin paint layer on the surface of the sheet material containing clay minerals, increases the proportion of clay minerals in the synthetic resin layer that come into contact with the atmosphere, and Since it adsorbs odorous gaseous substances, even more excellent odor absorption performance can be imparted to the sheet material. In addition, it is preferable that the sheet materials of the first and second inventions have a design imparting means applied to at least the surface resin layer (synthetic resin layer or resin paint layer), so that they have excellent odor absorbing properties and a design property. Can be made of high sheet material. This design imparting means includes applying an embossed pattern using an embossing method, applying a printed pattern using a gravure printer, screen printer, rotary screen printer, etc., or forming a surface treatment layer by applying a surface treatment agent. There are other methods. These may be used alone or in combination of two or more. The embossed pattern may be formed either before or after the printed pattern is formed, and the surface treatment layer may be formed before or after the embossed pattern is formed, and the printed pattern may be added after the layer is formed. . In addition, these design imparting means may be applied either before or after the pore forming step. still,
After the pore forming step, it is necessary to perform the process so as not to close the pores. Here, it is preferable that the printing paint or surface treatment agent used for imparting design properties contains the above-mentioned clay mineral mixed therein. This is because by incorporating the clay mineral, even more excellent odor absorbing performance can be imparted to the sheet material. In this case, the amount of clay mineral mixed is preferably 50 to 150 parts by weight based on 100 parts by weight of the resin solid content of the paint or surface treatment agent. If the mixing amount is less than 50 parts by weight, no significant improvement in odor absorption performance is observed. Also, the mixing amount is 150
This is because if the amount exceeds 1 part by weight, problems such as a decrease in film strength and coatability may occur, which is not preferable. In addition, as a method for imparting an embossed pattern, a method generally used for thermoplastic resins can be adopted, and in particular, a roll embossing method, that is, a resin layer is heated and shaped with a cold embossing roll, or a heated embossing roll is used. It is efficient and preferable from the point of view of mass production. Further, methods for forming a printed pattern include a method for forming a pattern using a gravure printing machine, a screen printing machine, a rotary screen printing machine, etc., a method for forming a pattern using a valley printing machine, and the like. In this case, the printing paint used is a water-based or solvent-based paint made of resin such as polyvinyl chloride resin, urethane resin, polyamide resin, etc. alone or a copolymer thereof, or a mixture thereof.
Further, the surface layer is formed using a general surface treatment agent processing method such as a gravure method, a roll coater method, a knife coater method, or the like. Thereby, a sheet material with excellent design and high added value can be obtained. Furthermore, in the sheet materials of the first and second inventions, the synthetic resin layer preferably has a layer thickness of 0.05 to 1.0 mm. This is because if the layer thickness is less than 0.05 mm, defects in physical properties and strength are likely to occur, and if it exceeds 1.0 mm, the weight becomes heavy and there are greater restrictions on workability and construction. [Action of the Invention] Although the effects of the first invention and the second invention are not necessarily clear yet, they are thought to be as follows. First, the sheet materials of the first and second inventions have a sheet base material containing a clay mineral as one of their constituent elements. The sheet base material containing this clay mineral reaches the sheet base material from the surface of the resin layer (synthetic resin layer or resin paint layer) of the sheet material through a large number of fine pores that penetrate the base material. It's communicating. By the way, the clay mineral in this sheet base material consists of fibers with a diameter of about 0.005 to 0.6 μm, and pores (channels) with a rectangular cross section of about 10 to 6 Å exist parallel to the fibers. The pores or breaks in the pores serve as receptor sites for odorous gaseous substances, in particular ammonia, isovaleric acid, pyridine, etc. Therefore, the atmosphere that is in contact with the surface of the resin layer of the sheet material comes into contact with the clay minerals in the sheet base material through the pores, and the odorous gaseous substances that are odor components in the atmosphere are transferred to the clay minerals. Because it is adsorbed by
It is thought that this gives the sheet material excellent odor absorption performance. The clay mineral also has the ability to absorb and release atmospheric humidity. Further, since the surface layer of the sheet material is made of resin, even if the surface gets stained with cigarette tar, mud, or other dirt, it can be easily cleaned with water, a neutral detergent, etc., and it is not easily scratched. Moreover, the second invention uses a resin coating layer containing clay mineral as one of its constituent elements. This clay mineral exhibits the same odor-absorbing performance as mentioned above, so it is
In the original sheet material, this clay mineral adsorbs odor-absorbing gaseous substances in the air that come into contact with the clay mineral in the resin paint layer through the pores of the sheet material, or the clay mineral on the surface of the resin paint layer absorbs odor-absorbing gaseous substances. It is thought that the sheet material comes into contact with the atmosphere and adsorbs odor-absorbing gaseous substances in the air, thereby imparting even better odor-absorbing performance to the sheet material. [Effects of the Invention] As described above, the sheet materials of the first and second inventions are materials with excellent odor absorbing properties, and when used as interior materials for rooms or automobiles, no special purification device is required to be attached. Instead, the interior material has the remarkable effect of adsorbing and purifying odorous gaseous substances in the room, etc., and has the effect of greatly reducing costs. [Example] Figures 1 to 6 show the first invention and/or the second invention.
This figure conceptually shows a specific example of the sheet material of the invention. FIG. 1 shows an embodiment of the first invention, in which a sheet material 1 has a synthetic resin layer 4 laminated on the surface of a sheet base material 2 containing fibrous clay minerals 3. Holes 5 are formed in the material 1 so as to penetrate through the synthetic resin layer 4 and reach the sheet base material 2 . Although the pores 5 are enlarged for easy understanding and the number of pores 5 is small, in reality, a large number of fine pores 5 are provided to improve the odor absorbing performance and to improve the odor absorbing performance of the sheet. The surface of the material 1 has good decorative properties. The synthetic resin layer 4 of the sheet material 1 is colored or uncolored as appropriate, and its surface is embossed or printed by a conventional method. When used as an interior material, the sheet base material 2 is Affix it to the joint side of the room, such as the wall surface of the vehicle or the body of the car, using adhesive. Here, odor components in the room come into contact with the sheet base material 2 through the pores 5 of the sheet material 1,
Odorous gaseous substances in the atmosphere are adsorbed by clay minerals and indoor air can be purified. Further, in this case, if the structure is such that the pores 5 also penetrate the sheet base material 2, the odor absorbing performance can be further improved. FIG. 2 shows another embodiment of the first invention, in which the sheet material 11 has a synthetic resin layer 14 containing clay minerals 16 laminated on the surface of a sheet base material 12 containing clay minerals 13. Further, the sheet material 11 is formed with a hole 15 that penetrates the synthetic resin layer 14 and reaches the sheet base material 12. That is, since odor components in the atmosphere come into contact with the clay minerals 16 in the synthetic resin layer 14 and the sheet base material 11, the odor absorption effect can be further enhanced. Also,
In this case, if the structure is such that the pores 15 also penetrate the sheet base material 12, the odor absorbing performance can be further improved. Furthermore, FIG. 3 is an enlarged cross-sectional view of a main part conceptually showing the sheet material 11 shown in FIG. 2 provided with a surface area enlarging means. Since the contact area is increased, more odorous gaseous substances can be adsorbed, thus improving the ability to purify the atmosphere. FIG. 4 shows an embodiment of the second invention, in which a sheet material 21 has clay minerals 29 between a sheet base material 22 containing clay minerals 23 and a synthetic resin layer 24.
A resin paint layer 28 is provided in the sheet material 21, and the sheet material 21 has pores 2 that penetrate the synthetic resin layer 24 and the resin paint layer 28 and reach the sheet base material 22.
5 is formed. By providing the resin paint layer 28, the bonding between the sheet base material 22 and the synthetic resin layer 24 can be strengthened, and the clay mineral 29 in the resin paint layer 28 can effectively exhibit odor absorbing performance. It can enhance the odor absorption effect. FIG. 5 shows another embodiment of the sheet material of the second invention, in which the sheet material 31 has a synthetic resin layer 34 laminated on the surface of a sheet base material 32 containing clay minerals 33. Further, a resin paint layer 38 containing clay minerals 39 is laminated on the synthetic resin layer 34, and the sheet material 31 has a resin paint layer 38, a synthetic resin layer 34, and a sheet base material 32.
A hole portion 25 is formed to penetrate through the hole portion 25 . By providing the resin paint layer 38 on the surface of the sheet material 31, the clay mineral 39 in the paint layer 38
Since the ratio of contact with the atmosphere increases, the odor absorption effect can be further enhanced. Furthermore, FIG. 6 shows another embodiment of the sheet material of the second invention, in which the sheet material 41
, a resin paint layer 48 is provided between a sheet base material 42 containing clay mineral 43 and a synthetic resin layer 44 containing clay mineral 46, and the respective resin layers are laminated. The material 41 includes a synthetic resin layer 44, a resin paint layer 48, and a sheet base material 42.
Holes 45 are formed through the resin coating layer 4.
8 contains clay mineral 49. By providing the resin paint layer 48, the bond between the sheet base material 42 and the synthetic resin layer 44 can be strengthened, and the clay mineral 49 in the resin paint layer 48 can enhance the odor absorption effect. Furthermore, by providing the synthetic resin layer 44 on the surface of the sheet material 41, clay minerals 49 in the resin layer 44 can be
Since the ratio of contact with the atmosphere increases, the odor absorption effect can be further enhanced. This will be specifically explained below using examples. Example 1 A sheet material consisting of a sheet base material and a synthetic resin layer was manufactured, and a performance evaluation test was conducted. First, sepiolite-containing wallpaper having the composition shown in Table 1 was prepared as a sheet base material. Table 1 Composition of sheet base material - Pulp 100 parts by weight - Sepiolite 100 parts by weight - Aqueous acrylic emulsion 10 parts by weight (solid content) - Retention agent 1 part by weight - Coagulant 1 part by weight Next, as a synthetic resin, Prepare a soft vinyl chloride resin composition with the composition shown in Table 2, and mix it with approx.
The mixture was kneaded with a mixing roll at 150°C, and then laminated onto a sheet base material using a calender roll at about 160°C to obtain a beige colored laminated sheet with a thickness of about 0.2 mm. Table 2 Compounding composition of synthetic resin・Vinyl chloride resin (=1100) 100 parts by weight・DOP 100 parts by weight・Paraffin chloride 10 parts by weight・Ca-Zn composite stabilizer 1 part by weight・Chelator 1 part by weight・Titanium white pigment 15 parts by weight, 3 parts by weight of benzidine yellow, 70 parts by weight of calcium carbonate, 5 parts by weight of antimony trioxide.Next, after heating the surface of the resin layer of this laminated sheet using a far-infrared heater, the irregularities were removed. A patterned laminated sheet was obtained by applying an emboss pattern using an embossing roll having a dense cloth-grain pattern. Next, on this patterned laminated sheet, the needle spacing was 5
Using a needle roll having a large number of thin metal needles with a diameter of 1 mm, holes reaching the sheet base layer from the resin surface were formed to obtain a sheet material according to the first invention (sample number 1). This sheet material had a soft feel. A performance evaluation test of the obtained sheet material was conducted by an odor absorption test and a hygroscopicity test. First, the odor absorption test was conducted by a cigarette smoke odor absorption test and a high concentration ammonia gas odor absorption test.
In the tobacco smoke odor absorption test, the ceiling was used as the test material.
Internal volume 91 with the other five sides surrounded by acrylic plates
(450mm x 450mm x 450mm) box was used. A commercially available filtered cigarette (leaf part length: 30 mm) is placed in this box, ignited, and immediately after the smoke disappears, 30 minutes later, 60 minutes later, and 90 minutes later, The ammonia concentration was measured using a gas detection tube. After the measurement, the front of the box was opened to visually observe the state of the smoke, and at the same time, the degree of odor was sensory-evaluated to evaluate cigarette smoke. The ammonia content in the smoke of one cigarette is
It is 80ppm. Moreover, the test was conducted at room temperature (24°C). The results obtained are shown in Table 3. In the table, ``○'' in the ``Smoke level'' column means ``little'', ``△'' means ``a lot'', and ``○'' in the ``smell level'' column means ``weak''.
"△" indicates "strong" and "x" indicates "very strong" (the same applies below). The odor absorption test for high-concentration ammonia gas uses the same box as above. 1.0ml of a 5.6% aqueous ammonia solution is dropped into the box, and the ammonia concentration in the box is measured after 30 minutes, 60 minutes, and 90 minutes. Measured with a detection tube. The results obtained are shown in Table 4. Next, the hygroscopicity test was conducted in accordance with the test method of JIS 23 M-102. First, the test material is 150mm x 150
The sample was cut to a size of mm, and an acrylic resin plate cut to the same size was bonded to the test material using a vinyl acetate resin adhesive to obtain a bonding material. Next, the bonding material was dried in a desiccator for 24 hours, and the weight of the dried bonding material was measured. Next, this bonding material was immediately left in a constant temperature and humidity chamber adjusted to a temperature of 50° C. and a humidity of 98% for 6 hours, and then the weight of the bonding material was measured. From these measurement results, the moisture absorption performance was evaluated using the following formula. Moisture absorption performance evaluation value ( hygroscopicity )
The larger the value, the better the moisture absorption performance. Hygroscopicity (mg/cm ² )=Amount of moisture absorbed (mg: weight difference before and after standing)/Surface area of test material (cm ² ) The obtained results are also shown in Table 4. For comparison, a sheet material was prepared in the same manner as described above except that commercially available wallpaper lining paper (main components: pulp, talc) was used as the sheet base material, and a comparative sheet material (sample number C1) was obtained. Ta. The comparative sheet material was subjected to the same performance evaluation test as described above, and the results are shown in Tables 3 and 4.

【table】

【table】

[Table] As is clear from Tables 3 and 4, the sheet material of the example according to the first invention is superior in odor absorption and moisture absorption compared to the comparative sheet material. Note that the sheet material of this example showed good workability. Example 2 A sheet material consisting of a sheet material, a clay mineral-containing resin paint layer, and a synthetic resin layer was manufactured, and the same performance evaluation test as in Example 1 was conducted. First, a water-based acrylic resin paint (resin solid content) was applied to the surface of the same sepiolite-containing wallpaper as in Example 1.
13 parts by weight) attapulgite per 100 parts by weight
A resin paint containing 13 parts by weight was applied using a bar coater and dried to obtain a resin paint-coated sheet base having a basis weight of 150 g/m ² and a thickness of about 2 mm. Next, a synthetic resin composition having the composition shown in Table 5 was prepared as a synthetic resin, and it was molded into a beige sheet with a thickness of 0.18 mm using an extruder at a temperature of about 15°C. A laminated sheet was obtained by laminating it with a paint-coated sheet base material. Next, on the surface of the resin layer of this laminated sheet, a pale pink floret pattern was applied using a gravure printing machine. Table 6 shows the composition of the printing paint used at this time. Table 5 Synthetic resin composition - Urethane resin 100 parts - Ca-Ba-Zn complex stabilizer 2.5 parts by weight - Lubricant 1 part by weight - Titanium white pigment 15 parts by weight - Benzidine yellow pigment 2 parts by weight - Calcium carbonate 15 Parts by weight・Chelator 2.5 parts by weight Table 6 Printing paint composition・Solvent-based acrylic printing paint (Resin solid content: 15 parts by weight) 100 parts by weight・Sepiolite 15 parts by weight・Titanium white pigment 12 parts by weight・Watchin Grazed pigment 2 parts by weight Furthermore, after heating the surface of the resin layer of this printed patterned laminated sheet using a far-infrared heater, embossing is performed between an embossing roll having a cloth grain pattern and a rubber roll. A patterned laminated sheet was obtained. Next, holes were formed in this patterned laminated sheet in the same manner as in Example 1 to obtain a sheet material of the second invention (Sample No. 2). This sheet material had a soft feel. The performance evaluation test of the obtained sheet material was carried out in Example 1.
I went in the same way. For comparison, a sheet material was prepared in the same manner as described above, except that a commercially available nonwoven fabric (thickness: 1 mm) made of acrylic fiber was used as the sheet base material, and a sheet material for comparison ( Sample number C2) was obtained, and the results of these performance evaluation tests are also shown in Tables 3 and 4 above. As is clear from Tables 3 and 4, it can be seen that the sheet material according to the second invention has superior odor absorption and hygroscopicity compared to the comparative sheet material.
Note that the sheet material of this example showed good workability. Example 3 A sheet material consisting of a sheet base material, a synthetic resin, and a clay mineral-containing resin coating layer was manufactured, and the same performance evaluation test as in Example 1 was conducted. First, a sepiolite-containing wallpaper similar to that in Example 1 was prepared, and then a synthetic resin having the composition shown in Table 2 of Example 1 was laminated onto a sheet base material in the same manner as in Example 1, to a thickness of about 0.2 mm. A thick beige colored laminated sheet was obtained. Next, a surface treatment agent paint having the composition shown in Table 7 was applied to the surface of the synthetic resin layer using a gravure roll, and dried to form a resin paint layer with a thickness of about 0.1 mm.
Furthermore, holes were formed in the same manner as in Example 1 to obtain a sheet material (sample number 3). This sheet material had a soft feel. Table 7 Compounding composition of surface treatment agent Water-based acrylic surface treatment agent paint (resin solid content: 15 parts by weight) ...100 parts by weight Sepiolite ...13 parts by weight Performance evaluation test of the obtained sheet material was conducted Example 1
The results obtained in the same manner as above are also shown in Tables 3 and 4. Example 4 A sheet material consisting of a sheet base material and a clay mineral-containing synthetic resin layer was manufactured, and the same performance evaluation test as in Example 1 was conducted. First, a sepiolite-containing wallpaper similar to that in Example 1 was prepared, and a soft vinyl chloride resin composition having the composition shown in Table 8 was laminated onto the sheet base material in the same manner as in Example 1, to give an approximately 0.2 A beige colored laminated sheet with a thickness of mm was obtained. Next, an embossed pattern and voids were formed in the same manner as in Example 1 to obtain a sheet material according to the first invention (sample number 4). This sheet material had a soft feel. Table 8 Compounding composition of synthetic resin - Vinyl chloride resin (=1100) 100 parts by weight - DOP 50 parts by weight - Sepiolite 30 parts by weight - Chlorinated paraffin 10 parts by weight - Ca-Zn composite stabilizer 1 part by weight - Chelator 1 weight 15 parts by weight of titanium white pigment 2 parts by weight of benzidine yellow 70 parts by weight of calcium carbonate 5 parts by weight of antimony trioxide A performance evaluation test of the obtained sheet material was conducted in Example 1.
The results obtained in the same manner as above are also shown in Tables 3 and 4. Example 5 A sheet material consisting of a sheet base material, a clay mineral-containing resin paint layer, and a clay mineral-containing synthetic resin layer was produced, and the same performance evaluation test as in Example 1 was conducted. First, sepiolite-containing wallpaper similar to that in Example 1 was prepared, and a surface treatment agent paint having the composition shown in Table 7 was applied to the surface of the paper using a barcoder, and dried to give a basis weight of 150 g/m. ^2. A resin paint coated sheet base material having a thickness of approximately 2 mm was obtained. Next, on the surface of the resin paint layer of the resin paint coated sheet base material, a synthetic resin having the composition shown in Table 8 of Example 4 prepared in advance was laminated in the same manner as in Example 1,
A sheet material was obtained by forming an embossed pattern and voids in the same manner as in Example 1 (Sample No. 5). This sheet material had a soft feel. The performance evaluation test of the obtained sheet material was conducted in the same manner as in Example 1, and the results are shown in Tables 3 and 4.

[Brief explanation of drawings]

FIG. 1 is a conceptual sectional view of an embodiment of the first invention;
FIG. 2 is a conceptual sectional view of another embodiment of the first invention;
FIG. 3 is a conceptual partial enlarged cross-sectional view of still another embodiment of the first invention, FIG. 4 is a conceptual cross-sectional view of an embodiment of the second invention, and FIG. 5 is a conceptual diagram of another embodiment of the second invention. The sectional view and FIG. 6 are further conceptual sectional views of the second invention. 1, 11, 21, 31, 41... sheet material,
2, 12, 22, 32, 42... sheet base material,
3,13,23,33,43...clay mineral, 4,
14, 24, 34, 44...Synthetic resin layer, 5, 1
5, 25, 35, 45...Vacancy, 6, 16, 2
6, 36, 46... Clay mineral, 17... Surface area expanding means, 28, 38, 48... Resin paint layer, 2
9,39,49...clay mineral.

Claims (1)

[Scope of Claims] 1. A sheet material comprising a sheet base material containing a hydrated magnesium silicate clay mineral and a synthetic resin layer formed on the surface of the sheet base material, the sheet material comprising at least the synthetic resin layer. The hydrated magnesium silicate clay mineral has a length of 10 μm or less and an aspect ratio of 100 or less. A sheet material characterized by being an aggregate of microcrystals. 2. The sheet material according to claim 1, wherein at least the synthetic resin layer of the sheet material is provided with surface area enlarging means. 3 A sheet material formed of a sheet base material containing a hydrated magnesium silicate clay mineral, a resin paint layer containing a hydrated magnesium silicate clay mineral formed on the surface of the sheet base material, and a synthetic resin layer. The sheet material has a large number of fine pores that penetrate the synthetic resin layer and the resin paint layer from at least the surface layer in the thickness direction and reach the sheet base material, and A sheet material characterized in that clay mineral is an aggregate of microcrystals with a length of 10 μm or less and an aspect ratio of 100 or less. 4. The sheet material according to claim 3, wherein the sheet material is provided with surface area enlarging means on at least the surface layer thereof. 5. The sheet material according to claim 1 or 3, wherein the synthetic resin layer contains a hydrous magnesium silicate clay mineral.