JP4628767B2 - Contaminated gas removal paper - Google Patents

Description

  The present invention is intended to control pests and fumigation in storage facilities of storage facilities, etc., for the remaining fumigation gas after fumigation treatment with fumigation gas, and volatile organic compounds (hereinafter referred to as volatile organic compounds) emanating from construction materials (Referred to as VOC) and paper that removes acidic and alkaline air pollutant gases. Specifically, after fumigation, the air in the cabinet is forcibly ventilated to reach a safe management concentration, and then the type and arrangement of the items stored in the cabinet, or the environmental change in temperature and humidity, etc. Prevents the fumigation gas from desorbing and prevents the fumigation gas concentration in the warehouse from rising again above the control concentration, or efficiently removes VOCs emanating from building materials and furniture immediately after new construction or renovation, The present invention relates to a pollutant gas removing paper for removing air pollutant gas by adsorption.

  It is a well-known fact that chemical fumigation has been carried out not only for cultural properties but also for quarantine and agriculture fields in order to control pests and insects. In Japan, methyl bromide has been widely used as an insecticidal fumigant for cultural properties because of its excellent insecticidal power and permeability. In particular, fumigants using a mixed gas of methyl bromide and ethylene oxide are effective for insecticidal and sterilization, so materials and works (hereinafter referred to as collections) in museums, museums, libraries, archives, etc. It has been used for regular fumigation of collections at the time of new acceptance and every year or every other year.

  However, at the 9th Montreal Protocol Conference of the Parties in 1997, methyl bromide (with ozone depletion coefficient of 0.2 or more is subject to regulation, which may cause ozone layer destruction and carcinogenicity. It was agreed that the production and use of methyl (ozone depletion factor of 0.4, which is subject to regulation) will be abolished by 2005. Therefore, fumigation treatment with methyl iodide (ozone destruction coefficient = 0.02) or propylene oxide (ozone destruction coefficient = 0) as an alternative fumigating agent for methyl bromide and a study to confirm its effectiveness and safety were started. It was.

Generally conventional Kaoru蒸作industry has been carried out in Japan, after the inside of the storehouse for 24 hours at 1 m ³ per 100g of about fumigant (methyl bromide 86% + ethylene oxide 14%), several ppm or less Forcibly ventilate the air in the chamber for several days until the safe control concentration is reached. However, the storage that once reached the safe management concentration due to the desorption of the fumigation gas adsorbed to the storage due to the difference in the type of storage and the arrangement in the storage, and environmental changes such as temperature and humidity The fumigation gas concentration inside has a problem that it rises again to several tens of ppm. Therefore, there has been a demand for an inexpensive material that effectively removes low-concentration fumigation gas remaining in the storage or desorbed from the storage.

  On the other hand, “sick house syndrome” of newly constructed or renovated residents has become a problem in recent years. Some of the causes are thought to be caused by VOCs such as formaldehyde, xylene, toluene, hydrogen sulfide, and acetic acid emanating from building materials and furniture, and regulations to further improve the building environment will be introduced. Became. In addition, alkaline and acidic air pollutant gases such as ammonia, sulfurous acid gas, and nitric acid gas have been a problem for some time, and measures to prevent discoloration and deterioration due to polluted gas in the collection of cultural properties are also taken. It is getting to be. Thus, in order to provide a safe environment for people and things, there is a demand for a material that can effectively remove the pollutant gas in a building space immediately after a new construction or renovation.

  The inventors of the present invention include a gas-adsorbing powder in the middle layer of three or more layers of multi-layered laminated paper mainly composed of papermaking fibers in Patent Document 1, and mainly composed of papermaking fibers on the front and back of the middle layer. Proposal of polluted gas removal paper with laminated paper, in which the gas-adsorbing powder is a powdered activated carbon that is a hydrophobic gas-adsorbing powder, or iron-containing aluminum that is a hydrophilic gas-adsorbing powder He introduced hydrates, zinc aluminosilicate minerals and mixtures with silica gel as preferred.

  In addition, in the Patent Document 2, the present inventors formed a coating layer mainly composed of a gas-adsorbing powder and an adhesive on at least one side of a base paper mainly composed of papermaking fibers, or partially, We proposed a pollutant gas removal paper in which thin paper was laminated on the surface of the paint layer. Among them, the gas-adsorbing powder was made of powdered activated carbon, which is a hydrophobic gas-adsorbing powder, or hydrophilic gas adsorption. It was introduced that iron-containing aluminum hydrates, zinc aluminosilicate minerals, and silica gel, which are powders, are preferred.

Japanese Patent Application No. 2004-233292 Japanese Patent Application No. 2004-233293

The pollutant gas removal paper proposed in Patent Document 1 and Patent Document 2 described above has an ability to remove pollutant gases such as fumigation gas, various VOCs, and air pollutant gas. However, it has not been able to adapt to the fine usage methods that can accurately cope with various different environments and apply expensive gas-adsorbing powders in the minimum necessary amount. An object of the present invention is to solve the above-described problems, and specifically, the following six points are the problems.
(1) To find a powder having excellent adsorption performance against fumigation gas.
(2) To find a powder having excellent adsorption performance against pollutant gases such as VOC and alkaline or acidic air pollutant gases.
(3) A paint layer mainly composed of a gas adsorbing powder and an adhesive is provided on one side or both sides of the base paper.
(4) Coating paper provided with a coating layer mainly composed of hydrophobic gas-adsorbing powder and adhesive, and coating provided with a coating layer mainly composed of hydrophilic gas-adsorbing powder and adhesive By combining paper and changing the type and amount of gas-adsorbing powder, obtain contaminated gas-removal paper that matches the environment in which it is applied.
(5) Laminate thin paper on the surface of the paint layer to prevent the gas-adsorbing powder from falling off and not to contaminate the stored items.
(6) It can be disposed of by incineration waste disposal and is inexpensive.

  That is, the invention according to claim 1 of the present invention has a coating layer (2) mainly composed of hydrophobic gas-adsorbing powder and adhesive on one side of a base paper (4) mainly composed of papermaking fibers. Or a partially formed coated paper, and a coating layer (3) mainly composed of a hydrophilic gas-adsorbing powder and an adhesive is formed on the entire surface or partially on the opposite side. This is a polluted gas-removing paper characterized in that paper is manufactured, and then a thin paper (1) mainly composed of papermaking fibers is laminated and integrated on the front and back surfaces of the coated paper.

  The invention according to claim 2 of the present invention has a coating layer (2) mainly composed of hydrophobic gas-adsorbing powder and adhesive on one side of a base paper (4) mainly composed of papermaking fibers, or A partially formed coated paper is manufactured, and then a thin paper (1) mainly composed of papermaking fibers is laminated and integrated on the coating surface of the coated paper, and a papermaking fiber prepared separately. A coated paper having a coating layer (3) mainly composed of hydrophilic gas-adsorbing powder and adhesive on one side of a base paper (4) mainly composed of A thin paper (1) mainly composed of papermaking fibers is laminated and integrated on the coating surface of the coated paper. Next, it is characterized by coated paper having a coating layer mainly composed of hydrophobic gas-adsorbing powder and adhesive, and coated paper having a coating layer mainly composed of hydrophilic gas-adsorbing powder and adhesive. This is a polluted gas removing paper characterized in that non-coated surfaces of coated paper are bonded together via an adhesive layer (5).

  The invention according to claim 3 of the present invention is characterized in that the coating layer comprises 10 to 25 parts by mass of an adhesive with respect to 100 parts by mass of the gas-adsorbing powder. Contaminant gas removal paper.

  The invention according to claim 4 of the present invention is the pollutant gas according to any one of claims 1 to 3, wherein the hydrophobic gas-adsorbing powder is powdered activated carbon having an average particle size of 50 μm or less. Removal paper.

  The invention according to claim 5 of the present invention is the contaminated gas removing paper according to any one of claims 1 to 4, wherein the hydrophilic gas-adsorbing powder is iron-containing aluminum hydrate. is there.

  The invention according to claim 6 of the present invention is the pollutant gas removing paper according to any one of claims 1 to 4, wherein the hydrophilic gas adsorbing powder is a zinc aluminosilicate mineral. is there.

  The invention according to claim 7 of the present invention is the contaminated gas removing paper according to any one of claims 1 to 4, wherein the hydrophilic gas-adsorbing powder is silica gel.

  The invention according to claim 8 of the present invention is the contaminated gas removing paper according to any one of claims 1 to 4, wherein the hydrophilic gas-adsorbing powder is silica-alumina gel clay. It is.

  In the invention according to claim 9 of the present invention, the hydrophilic gas-adsorbing powder is any two kinds selected from iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel and silica-alumina gel-like clay. The contaminated gas removing paper according to any one of claims 1 to 4, wherein the paper is a mixed gas.

  The invention according to claim 10 of the present invention is that the hydrophilic gas adsorbing powder is any three kinds selected from iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel and silica-alumina gel-like clay. The contaminated gas removing paper according to any one of claims 1 to 4, wherein the paper is a mixed gas.

  The invention according to claim 11 of the present invention is characterized in that the hydrophilic gas-adsorbing powder is a mixture of iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel and silica-alumina gel clay. Item 5. The contaminated gas removing paper according to any one of Items 1 to 4.

According to the present invention, the fumigation gas concentration of the air in the storage is lowered to a safe management concentration of several ppm or less by ventilation after the fumigation treatment, and then 0.025 to 0.1 m ² per 1 m ³ (use By suspending the polluted gas removing paper of volume: A / V = 0.025 to 0.1 m ⁻¹ ) for several days from the ceiling or along the wall, or covering the storage and storage shelves, Residual and desorbed low-concentration fumigation gas can be effectively removed. In addition, it effectively removes pollutant gases such as VOCs in a building space newly constructed or renovated by the same method as described above for one week to several months, and adsorbs and removes air pollutant gases. Can provide an inexpensive material that can be incinerated and discarded as a general waste disposal.

  In order to solve the above-described problems, the present inventors have developed a powder having excellent adsorption performance for methyl iodide and propylene oxide, which are substitutes for methyl bromide, and VOC, air pollutant gas, etc. A study was conducted to find a powder with excellent adsorption performance against pollutant gases. Next, a paint layer mainly composed of a gas-adsorbing powder and an adhesive is formed on the whole or a part of at least one surface of a base paper mainly composed of papermaking fibers, and then a thin paper is laminated on the surface of the paint layer. As a result of the integration, the gas adsorbing powder is prevented from falling off and the stored product is not soiled. In addition, the material of the base paper constituting the whole was made into a form that can be incinerated and discarded by general waste disposal by using paper mainly made of papermaking fibers.

In order to find a powder having excellent gas adsorption performance, the present inventors examined various types of powder in two groups as described below. For this purpose, 25 g / m ^{2 of} a paint mainly composed of 100 parts by mass of various gas-adsorbing powders and 15 parts by mass of adhesive is applied to one side of a base paper having a basis weight of 60 g / m ² manufactured mainly using papermaking fibers. Coating was performed to obtain a coated paper having a basis weight of 85 g / m ² . Next, as a gas adsorption performance evaluation, various coated papers were cut into 10 × 10 cm squares to obtain evaluation samples. Furthermore, the above-described base paper having a basis weight of 60 g / m ² was similarly prepared as a blank. These samples are pretreated for 24 hours under conditions of a temperature of 23 ° C. and a relative humidity of 50%, then the samples are put in a Tedlar bag, degassed, and injected with 2 liters of various gases prepared to known concentrations. Then, immediately using a detector tube (manufactured by Gastec Co., Ltd.), the concentration was measured under the condition of a temperature of 23 ° C., and this was taken as the initial concentration. After leaving the temperature at 23 ° C. for 5 hours, the gas concentration in the Tedlar bag was measured again. The gas adsorption performance of each sample was converted as an adsorption amount (μg) per 1 g of each gas adsorbing powder by subtracting the residual concentration from the initial concentration. The initial concentrations were 300 ppm for propylene oxide and methyl iodide, and 100 ppm for acetic acid, formaldehyde, hydrogen sulfide, xylene, toluene, ammonia, sulfurous acid gas, and nitric acid gas.

  The first group of gas-adsorbing powders are hydrophobic gas-adsorbing powders, typically represented by activated carbon. Activated carbon can be roughly classified into two types: granular activated carbon and powdered activated carbon. In the present invention, it is preferable to use powdered activated carbon having an average particle size of 50 μm or less in order to form a paint mainly composed of a gas adsorbing powder and an adhesive on the surface of the base paper. Generally, charcoal, wood, coconut shell, coal, lignite, bituminous coal, peat, etc. are used as raw materials for activated carbon. Since the pore size distribution that affects the gas adsorption amount varies greatly depending on the difference in the raw materials used, it is characterized by differences in the adsorption performance to various gases. In addition, for the purpose of adsorbing a specific gas as a target, the above-mentioned granular or powdery activated carbon is chemically treated, or a special functional activated carbon to which metals such as silver are attached is used. Also good.

  The second group of gas-adsorbing powders are hydrophilic gas-adsorbing powders such as iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel, silica-alumina gel clay, zeolite, alumina gel, etc. It is. These adsorbents are hydrophilic and are characterized by selectively adsorbing polar molecules such as water. The main object of the present invention is to remove the residual fumigation gas described above. However, it will be more useful if air pollutants such as sulfurous acid gas in the cabinet can be removed at the same time. In addition, in a newly built building, if polluting gases such as VOC emanating from building materials and furniture can be removed, it is indispensable for a newly built or renovated house or storage facility. Accordingly, an object of the present invention is to provide a contaminated gas removing paper utilizing the gas adsorbing powders of both groups.

Table 1 shows the results of evaluation by dividing the gas adsorption amount (μg) per 1 g of the various gas adsorbing powders described above into the following four categories. Although the standard differs depending on the type of pollutant gas, it was determined that a mark of “◯” or higher was acceptable as having pollutant gas adsorption performance.
A: Adsorbs polluting gas well.
○: Adsorbs pollutant gas.
Δ: Slightly adsorbs pollutant gas.
X: Contaminated gas is hardly adsorbed.
About propylene oxide: A: 7500 μg / g or more
○: Less than 7500 μg / g to 2000 μg / g or more
Δ: Less than 2000 μg / g to 500 μg / g or more
X: Less than 500 μg / g for methyl iodide ◎: 1500 μg / g or more
○: Less than 1500 μg / g to 1000 μg / g or more
Δ: Less than 1000 μg / g to 500 μg / g or more
×: Less than 500 μg / g Acetic acid, formaldehyde, hydrogen sulfide, xylene, toluene, ammonia, sulfurous acid gas, nitric acid gas A: 1000 μg / g or more
○: Less than 1000 μg / g to 500 μg / g or more
Δ: Less than 500 μg / g to 200 μg / g or more
X: Less than 200 μg / g

<Table 1>

From the results in Table 1, the following was found.
(1) The powder that adsorbs methyl iodide and propylene oxide well is coconut shell activated carbon, and wood activated carbon also adsorbs both gases, but is slightly inferior to coconut shell activated carbon. Silica gel adsorbs propylene oxide.
(2) Hydrophilic adsorbents such as iron-containing aluminum hydrate, zinc aluminosilicate mineral, and silica-alumina gel-like clay hardly adsorb methyl iodide and propylene oxide.
(3) Coconut shell activated carbon and wood activated carbon adsorb xylene and toluene. Iron-containing aluminum hydrate, zinc-alumina silicate mineral, silica gel, and silica-alumina gel-like clay absorb little xylene and toluene.
(4) Wood activated carbon, coconut shell activated carbon, and silica gel absorb little hydrogen sulfide, but iron-containing aluminum hydrate, alumina zinc silicate mineral, and silica alumina gel-like clay adsorb hydrogen sulfide.
(5) Iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel, silica-alumina gel clay, and wood pulp paper adsorb acetic acid.
From the above, it can be seen that a polluted gas removing paper carrying activated carbon alone is sufficient to remove residual fumigation gases such as methyl iodide and propylene oxide. However, it is necessary to use activated carbon and a hydrophilic adsorbent in combination in order to make it possible to adsorb and remove the VOC and air pollutant gas described above.

  In the present invention, a coated paper provided with a coating layer (2) mainly composed of a hydrophobic gas-adsorbing powder and an adhesive on one side of a base paper (4) mainly composed of paper-making fibers; Combine the coated paper with the coating layer (3) mainly composed of hydrophilic gas-adsorbing powder and adhesive on the opposite side of the fiber-based base paper. A thin paper sheet (1) mainly composed of the above is laminated and integrated for use. Alternatively, a coated paper having a coating layer (2) mainly composed of a hydrophobic gas-adsorbing powder and an adhesive on one side of a base paper (4) mainly composed of paper-making fibers is manufactured, and then A thin paper (1) mainly composed of papermaking fibers is laminated and integrated on the coating surface of the coated paper. A coated paper provided with a paint layer (3) mainly composed of hydrophilic gas-adsorbing powder and adhesive on one side of a base paper (4) mainly composed of paper-making fibers prepared separately, A thin paper (1) mainly composed of papermaking fibers is laminated and integrated on the coating surface of the coated paper. Next, non-coated surface of coated paper having a coating layer mainly composed of hydrophobic gas-adsorbing powder and adhesive, and coated paper having a coating layer mainly composed of hydrophilic gas-adsorbing powder and adhesive The two are bonded together via the adhesive layer (5).

  The gas adsorption performance of activated carbon, which is a hydrophobic gas adsorbent powder, varies depending on the raw materials used, and is greatly influenced by the pore diameter and pore distribution. The coconut shell activated carbon in which the peak of the average pore radius is concentrated in the vicinity of 1.0 nm has a much smaller average pore radius than the wood activated carbon in which the average pore radius is distributed in the range of 2.0 to 3.5 nm. Therefore, it has also been confirmed from the above-described evaluation results that the adsorption performance for the VOC such as fumigation gas, toluene and xylene is excellent. Accordingly, wood activated carbon can be used as the activated carbon used in the present invention, but coconut shell activated carbon is preferred. In addition, the activated carbon is preferably powdered activated carbon having an average particle size of 50 μm or less. The reason is that if the average particle size is larger than this, the surface of the coating layer will be rough due to the unevenness of the particles, and the specific surface area of the activated carbon will be small, so the pollutant gas adsorption performance tends to decrease, which is not preferable. is there. Further, since the specific surface area increases as the average particle size decreases, it is preferable as an effect of improving the pollutant gas adsorption performance. However, since the cost tends to increase as the average particle size decreases, the average particle size ranges from 3 to 50 μm. Are preferred. Also, the above-described functional activated carbon can be used in the present invention as long as the average particle size and price are appropriate.

Examples of the hydrophilic gas-adsorbing powder include silica gel, alumina gel, silica alumina gel, synthetic zeolite, iron-containing aluminum hydrate, zinc aluminosilicate mineral, etc., silica alumina gel gel clay And natural inorganic powders such as diatomaceous earth, diatom shale, white clay, activated white clay, and natural zeolite. These can be used alone or in combination of one or more. However, in order to supplement each gas adsorption performance, it is possible to use several kinds of powders in addition to activated carbon. Among the powders described above, iron-containing aluminum hydrate and zinc aluminosilicate mineral are commercially available from Mizusawa Chemical Industry Co., Ltd. under the trade names “Alphemite FP” and “Mizukanite HP”, respectively. Silica gel is commercially available from Fuji Silysia Chemical Ltd. under the trade name “Silica gel PA-270A”. Further, the silica-alumina gel-like clay is a kind of ore that exists in nature and is called allophane. Its properties are chemically active, and it is characterized by high adsorption and moisture absorption. The chemical composition is generally represented by (1-2) Sio ₂ .Al ₂ O _3. (4-6) H ₂ O, and is commercially available from Shinagawa Kasei Co., Ltd. under the trade name “Secard TS-35”. As shown in Table 1, iron-containing aluminum hydrates, zinc aluminosilicate minerals, and silica-alumina gel clays are particularly capable of adsorbing to hydrogen sulfide, and also adsorbing to acetic acid, formaldehyde, ammonia, sulfurous acid gas and nitric acid gas. Since it is good, it can be suitably used. Silica gel has excellent adsorption performance for ammonia, acetic acid, formaldehyde, and nitric acid gas, and can be suitably used.

In the present invention, a coating layer mainly composed of a hydrophobic gas-adsorbing powder and an adhesive is formed on one surface of a base paper mainly composed of papermaking fibers, and a hydrophilic layer is formed on the opposite surface. A paint layer mainly composed of a reactive gas adsorbing powder and an adhesive is formed on the entire surface or a part thereof, and a thin paper mainly composed of papermaking fibers is laminated and integrated on the front and back surfaces of the paint layer. It is. As the base paper and thin paper used here, paper made of papermaking fiber, dry or wet nonwoven fabric made of chemical fiber or synthetic fiber, spunbond paper, woven fabric, etc. can be used, but it has gas adsorption performance, In addition, it is preferable to use paper mainly composed of papermaking fibers because it can be easily incinerated and discarded. Further, it is preferably in the range of 40 and 80 g / ^{m 2} as the basis weight of the base paper. If the basis weight of the base paper is less than 40 g / m ² , the strike-through phenomenon of the paint immediately after the paint is applied to the base paper becomes severe, and the roll contamination of the coating machine becomes significant, which hinders continuous production. This is not preferable. On the other hand, when the basis weight of the base paper exceeds 80 g / m ² , the problems as described above are reduced, but the air permeability of the base paper is slow, which is not preferable. Furthermore, about the basic weight of the thin paper laminated | stacked on the front and back of a coating layer, it is preferable to exist in the range of 10-30 g / m < ² >. If the basis weight of the thin paper is less than 10 g / m ² , there is a risk that the gas adsorbing powder will drop off, and if it exceeds 30 g / m ² , the gas adsorption rate will be slightly reduced, which is not preferable.

  The papermaking fibers used for the base paper (4) and thin paper (1) include softwood bleached kraft pulp (NBKP), softwood unbleached kraft pulp (NUKP), hardwood bleached kraft pulp (LBKP), and softwood bleached sulfite pulp. (NBSP), thermomechanical pulp (TMP) and other wood pulp alone or a mixture, mainly non-wood pulp such as hemp and kenaf, rayon, vinylon, polyethylene, synthetic pulp, polypropylene and other chemical fibers and synthetic fibers Can be used in combination. Moreover, in order to improve the strength and water resistance of paper, a hot water-soluble fiber such as polyvinyl alcohol fiber, a low-melting-point heat-adhesive fiber such as polypropylene, polyethylene, or polyester, or a composite fiber can be used in combination. However, as shown in Table 1, it is desirable to use a method that makes the best use of gas adsorption performance with respect to ammonia, acetic acid, nitric acid gas, etc. that wood pulp originally has.

  The coating layer in the present invention is mainly composed of the gas adsorbing powder and the adhesive as described above. Adhesive types include acrylic emulsion, ethylene vinyl acetate emulsion, vinyl acetate emulsion, urethane emulsion and copolymer emulsions of these, synthetic rubber latex such as SBR, NBR and MBR, and adhesion for paper such as casein, starch and PVA. Those commonly used as agents are used alone or in combination of one or more as necessary.

  The coating material used in the present invention is prepared by adding a dispersant to the gas-adsorbing powder, dispersing in water, and then adding and mixing an adhesive. At this time, a water retention agent, a flow improver, an antiseptic, an antifungal agent and the like can be appropriately added as necessary. As for the usage-amount of an adhesive agent, 10-25 mass parts is preferable with respect to 100 mass parts of gas adsorbent powder. If the amount is less than 10 parts by mass, it is difficult to obtain the strength of the coating layer itself, and the lamination strength with the thin paper is insufficient. If the amount exceeds 25 parts by mass, the strength as described above is obtained, but the gas of the gas-adsorbing powder is obtained. Since adsorption performance is inhibited, it is not preferable.

The coating material thus prepared is applied to one side or both sides of the base paper using a coating machine such as a roll coater, a gravure coater, or a comma coater. At this time, the feature of the present invention is that the coated surface is covered with thin paper in order to prevent the stored product from being soiled due to falling off of the gas-adsorbing powder contained in the paint. For this, you may use a commonly used adhesive to bond the base paper and thin paper, but the paint layer in a wet state before coating the base paper and entering the drying oven It is preferable that the thin paper is laminated and pressure-bonded thereon, and the base paper (4) and the thin paper (1) are integrated with each other through the coating layer through a drying process. By doing so, the surface of the paint layer is covered with the adhesive, and as a result, it is possible to prevent the problem of deteriorating the adsorbing performance of the pollutant gas, and at the same time, the process of coating and bonding the adhesive is omitted. This is preferable because improvement in workability and cost reduction are expected. In addition, in order to obtain good air permeability, the gravure coater is engraved with dots, rhombuses, diagonal lines, letter patterns or various patterns with a depth of about 100 to 400 μm in an area ratio of about 60 to 80%. The coating layer can also be partially formed by using these rolls. In any case, the coating amount of the paint base paper (4) is preferably in the range of 15 to 50 g / m ² per side.

In the polluted gas-removed paper obtained as described above, the basis weight is 100 to 240 g / m ² , and the content of the gas adsorbing powder is the sum of both hydrophobic and hydrophilic gas adsorbing powders. 22.5 to 90 g / m ² . In general, the adsorption rate and adsorption amount of pollutant gas is such that the content of the hydrophobic and hydrophilic gas adsorbing powders scattered on the paper surface is less than 11.25 g / m ² . If the adsorption amount decreases and exceeds 45 g / m ² , there is no problem with the adsorption rate and adsorption amount of the pollutant gas, but the coating amount increases because the coating amount increases, which is not preferable.

  The coated paper using the hydrophobic gas-adsorbing powder obtained as described above and the coated paper using the hydrophilic gas-adsorbing powder are laminated so that the coating layer becomes the surface, A polluted gas removal paper according to the invention is obtained. Used when laminating paper to laminate two types of coated paper, one using a hydrophobic gas-adsorbing powder and the other using a hydrophilic gas-adsorbing powder. Common adhesives such as acrylic emulsions, ethylene vinyl acetate emulsions, vinyl acetate emulsions, urethane emulsions and copolymer emulsions thereof as water-based adhesives, synthetic rubber latex such as SBR, NBR, MBR, casein, starch, What is generally used as adhesives for papers, such as PVA, can be used suitably. In addition, adhesives such as solvent-based adhesives, hot melt adhesives, and pressure sensitive adhesives can also be used. However, adhesives that extremely impair air permeability adversely affect the removal of pollutant gases. It is necessary to use an appropriate amount of adhesive.

  Also, prepare one coated paper in advance when laminating two types of coated paper, one using a hydrophobic gas-adsorbing powder and the other using a hydrophilic gas-adsorbing powder. In addition, when manufacturing the other coated paper, the coated paper is laminated on the wet paint layer before being applied to the base paper and entered into the drying oven, and then crimped. It is preferable that both coated papers are integrated via a paint layer through a drying process. By doing so, the air permeability is not hindered by the adhesive and it is possible to omit the process of coating and bonding the adhesive at the same time as preventing the adsorption performance of the pollutant gas from being lowered. Therefore, it is preferable because improvement in workability and cost reduction are expected.

[Manufacture of base paper]
400 ml C. of 38 parts by weight of softwood bleached kraft pulp (NBKP) and 60 parts by weight of hardwood bleached kraft pulp (LBKP). S. F. 2 parts by mass of polyvinyl alcohol fiber (trade name “VBP107”, manufactured by Kuraray Co., Ltd.) was mixed with the pulp slurry obtained by beating the mixture into a slurry having a concentration of 8% by mass. A wet paper strength enhancer (trade name “WS-500”, manufactured by Nippon PMC Co., Ltd.) is added and dispersed in an amount of 0.5% by mass in terms of solid content with respect to the solid mass of the slurry. Anionic flocculant (trade name “Hi-Holder 351”, manufactured by Kurita Kogyo Co., Ltd.) was added in an amount of 0.006% by mass in terms of solid content, and the basis weight was 60 g / m using a circular net paper machine. A base paper of ² was obtained.

[Manufacture of thin paper (1)]
450 ml C. of 70 parts by weight of softwood bleached kraft pulp (NBKP) and 30 parts by weight of hardwood bleached kraft pulp (LBKP). S. F. A wet paper strength enhancer (trade name “WS-500”) is added in an amount of 0.3% by mass in terms of solid content and dispersed with respect to the solid content mass of the pulp slurry obtained by beating into An anionic flocculant (trade name “Hi-Holder 351”) is added in an amount of 0.006% by mass in terms of solid content, and is a thin paper for lamination having a basis weight of 15 g / m ² using a circular net paper machine in a conventional manner ( 1) was obtained.

[Coated paper-1 using hydrophobic gas-adsorbing powder]
Coconut shell activated carbon (trade name “Dazai CB”, manufactured by Nimura Chemical Industry Co., Ltd.), 100 parts by mass of adhesive (trade name “Nipol LX-430”, manufactured by Nippon Zeon Co., Ltd.) in solid content conversion 15 parts by mass was added, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied to one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. After being laminated and pressure-bonded, they were dried to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the coconut shell activated carbon in the polluted gas removal paper was 39 g / m ² .

[Coated paper-2 using hydrophobic gas-adsorbing powder]
On both sides of the base paper (4), application and lamination of the thin paper (1) are performed in the same manner as coated paper-1 using hydrophobic gas-adsorbing powder, and the solid content on both sides of the base paper (4) A paper for removing polluted gas with a basis weight of 180 g / m ² having a coating layer of 90 g / m ² was obtained. The content of the coconut shell activated carbon in this polluted gas-removed paper was 78 g / m ² .

[Coated paper-3 using hydrophobic gas-adsorbing powder]
Using a gravure coater provided with a sculpture roll having a concave area ratio of 70% and a depth of 300 μm, the paint obtained by the same method as coated paper-1 using a hydrophobic gas-adsorbing powder was used. Apply paint to one side of paper (4) so that the solid content is 45 g / m ² , laminate thin paper (1) on the surface of the wet paint layer before entering the drying oven, press and dry A contaminated gas removing paper having a basis weight of 120 g / m ² was obtained. The content of the coconut shell activated carbon in the polluted gas removal paper was 39 g / m ² .

[Coated paper-1 using hydrophilic gas-adsorbing powder]
15 parts by mass of an adhesive (trade name “Nipol LX-430”) in terms of solid content is added to 100 parts by mass of iron-containing aluminum hydrate (trade name “Allofemite FP”, manufactured by Mizusawa Chemical Industry Co., Ltd.) Sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of iron-containing aluminum hydrate in the polluted gas removal paper was 39 g / m ² .

[Coated paper-2 using hydrophilic gas-adsorbing powder]
15 parts by mass of an adhesive (trade name “Nipol LX-430”) in terms of solid content is added to 100 parts by mass of a zinc aluminosilicate mineral (trade name “Mizukanite HP”, manufactured by Mizusawa Chemical Co., Ltd.) Sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the zinc aluminosilicate mineral in the contaminated gas removing paper was 39 g / m ² .

[Coated paper-3 using hydrophilic gas-adsorbing powder]
To 100 parts by mass of silica gel (trade name “silica gel PA-270A”, manufactured by Fuji Silysia Chemical Co., Ltd.), 15 parts by mass of an adhesive (trade name “Nipol LX-430”) is added in terms of solid content to increase the viscosity. Sodium alginate was added as an agent to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of silica gel in this contaminated gas removing paper was 39 g / m ² .

[Coated paper-4 using hydrophilic gas-adsorbing powder]
Silica-alumina gel clay (trade name “Secard TS-35”, manufactured by Mizusawa Chemical Industry Co., Ltd.) 100 parts by mass, adhesive (trade name “Nipol LX-430”) 15 parts by mass in terms of solid content Then, sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the silica-alumina gel clay in this contaminated gas-removed paper was 39 g / m ² .

[Coated paper-5 using hydrophilic gas-adsorbing powder]
Solid adhesive (trade name “Nipol LX-430”) to 50 parts by weight of iron-containing aluminum hydrate (trade name “Allofemite FP”) and 50 parts by weight of zinc aluminosilicate mineral (trade name “Mizukanite HP”) 15 parts by mass in terms of minutes were added, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the iron-containing aluminum hydrate and zinc aluminosilicate-based mineral in the contaminated gas removing paper was 39 g / m ² .

[Coated paper-6 using hydrophilic gas-adsorbing powder]
Solid content conversion of adhesive (trade name "Nipol LX-430") to 50 parts by weight of iron-containing aluminum hydrate (trade name "Allofemite FP") and 50 parts by weight of silica gel (trade name "Silica gel PA-270A") 15 parts by mass was added, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the iron-containing aluminum hydrate and silica gel mixture in the polluted gas-removed paper was 39 g / m ² .

[Coated paper-7 using hydrophilic gas-adsorbing powder]
Adhesive (trade name “Nipol LX-430”) with respect to 50 parts by weight of iron-containing aluminum hydrate (trade name “Allofemite FP”) and 50 parts by weight of silica-alumina gel clay (trade name “Secard TS-35”) ) Was added in an amount of 15 parts by mass in terms of solid content, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the iron-containing aluminum hydrate and silica-alumina gel clay in the contaminated gas-removed paper was 39 g / m ² .

[Coated paper-8 using hydrophilic gas-adsorbing powder]
Solid component conversion of adhesive (trade name “Nipol LX-430”) to 50 parts by weight of zinc aluminosilicate mineral (trade name “Mizukanite HP”) and 50 parts by weight of silica gel (trade name “silica gel PA-270A”) 15 parts by mass was added, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the mixture of zinc aluminosilicate mineral and silica gel in the contaminated gas-removed paper was 39 g / m ² .

[Coated paper-9 using hydrophilic gas-adsorbing powder]
Adhesive (trade name “Nipol LX-430”) to 50 parts by weight of zinc aluminosilicate mineral (trade name “Mizukanite HP”) and 50 parts by weight of silica-alumina gel clay (trade name “Secard TS-35”) ) Was added in an amount of 15 parts by mass in terms of solid content, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the mixture of zinc aluminosilicate mineral and silica-alumina gel-like viscosity in this polluted gas-removed paper was 39 g / m ² .

[Coated paper-10 using hydrophilic gas-adsorbing powder]
Adhesive (trade name “Nipol LX-430”) is applied to 50 parts by mass of silica gel (trade name “silica gel PA-270A”) and 50 parts by weight of silica-alumina gel clay (trade name “Secard TS-35”). 15 parts by mass in terms of solid content was added, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the mixture of silica gel and silica-alumina gel-like viscosity in the contaminated gas-removed paper was 39 g / m ² .

[Coated paper-11 using hydrophilic gas-adsorbing powder]
To 35 parts by mass of iron-containing aluminum hydrate (trade name “Allofemite FP”), 35 parts by mass of zinc aluminosilicate (trade name “Mizukanite HP”) and 35 parts by mass of silica gel (trade name “silica gel PA-270A”) Then, 15 parts by mass of an adhesive (trade name “Nipol LX-430”) was added in terms of solid content, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the iron-containing aluminum hydrate, zinc aluminosilicate mineral and silica gel in the polluted gas-removed paper was 39 g / m ² .

[Coated paper-12 using hydrophilic gas-adsorbing powder]
35 parts by mass of iron-containing aluminum hydrate (trade name “Allofemite FP”), 35 parts by mass of zinc aluminosilicate mineral (trade name “Mizukanite HP”) and silica-alumina gel clay (trade name “Secard TS-35”) To 35 parts by mass, 15 parts by mass of an adhesive (trade name “Nipol LX-430”) is added in terms of solid content, sodium alginate is added as a thickener, and the viscosity is 1500 cps and the concentration is 40% by mass. It was adjusted. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the iron-containing aluminum hydrate, zinc aluminosilicate mineral, and silica-alumina gel clay in the contaminated gas-removed paper was 39 g / m ² .

[Coated paper-13 using hydrophilic gas-adsorbing powder]
35 parts by mass of zinc aluminosilicate (trade name “Mizukanite HP”), 35 parts by mass of silica gel (trade name “silica gel PA-270A”) and 35 parts by mass of silica-alumina gel clay (trade name “Secard TS-35”) 15 parts by mass of an adhesive (trade name “Nipol LX-430”) in terms of solid content was added to the parts, and sodium alginate was added as a thickener to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. . This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the mixture of zinc aluminosilicate mineral, silica gel, and silica-alumina gel clay in this polluted gas-removed paper was 39 g / m ² .

[Coated paper-14 using hydrophilic gas-adsorbing powder]
25 parts by mass of iron-containing aluminum hydrate (trade name “Allofemite FP”), 25 parts by mass of zinc aluminosilicate mineral (trade name “Mizukanite HP”), 25 parts by mass of silica gel (trade name “silica gel PA-270A”) and silica 15 parts by mass of an adhesive (trade name “Nipol LX-430”) in terms of solid content is added to 25 parts by mass of alumina gel clay (trade name “Secard TS-35”), and sodium alginate as a thickener. Was added to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 45 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying oven. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 120 g / m ² . The content of the iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel, and silica-alumina gel clay in the contaminated gas removing paper was 39 g / m ² .

[Example 1]
When producing coated paper-1 using hydrophilic gas-adsorbing powder and then producing coated paper-1 using hydrophobic gas-adsorbing powder, a coating layer is formed on one side, After laminating the thin paper (1) on the surface of the wet paint layer before entering the drying furnace and press-bonding, a coating layer on the opposite side is further formed, and hydrophilic gas is formed on the surface of the wet paint layer before entering the drying furnace. The non-coated surface of coated paper-1 using adsorbent powder was laminated, pressure-bonded and dried to obtain a contaminated gas-removed paper having a basis weight of 180 g / m ² .

[Example 2]
A contaminated gas-removed paper having a basis weight of 300 g / m ² was obtained in the same manner as in Example 1 except that the coated paper was 2 using hydrophobic gas-adsorbing powder.

[Example 3]
Coated paper-2 using a hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 4]
Coated paper-3 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 5]
Coated paper-4 using a hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 6]
Coated paper-5 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 7]
Coated paper-6 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 8]
Coated paper-7 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 9]
Coated paper-8 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 10]
Coated paper-9 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 11]
Coated paper-10 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 12]
Coated paper-11 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 13]
Coated paper-12 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 14]
Coated paper-13 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 15]
Coated paper-14 using hydrophilic gas-adsorbing powder was produced, and a contaminated gas-removed paper having a basis weight of 180 g / m ² was obtained in the same manner as in Example 1.

[Example 16]
10 g / in terms of solid content of vinyl acetate adhesive (trade name “Supertuck”, manufactured by Ito Mikuni Co., Ltd.) on the non-coated surface of coated paper-1 using hydrophobic gas-adsorbing powder After coating m ^2, coated paper 1 using hydrophilic gas-adsorbing powder was laminated, pressure-bonded, and dried to obtain a contaminated gas removing paper having a basis weight of 250 g / m ² .

[Example 17]
Applying 10 g / m ^{2 of} vinyl acetate adhesive (trade name “Supertuck”) to the non-coated surface of coated paper-3 using hydrophobic gas-adsorbing powder in terms of solid content, hydrophilic gas The coated paper-1 using the adsorbent powder was laminated, pressure-bonded and then dried to obtain a contaminated gas-removed paper having a basis weight of 250 g / m ² .

[Coated paper-4 using hydrophobic gas-adsorbing powder]
Except that the coated amount of the coating layer and 10 g / m ² in the same manner as coated paper -1 using a hydrophobic gas adsorbing powder, basis weight was obtained contaminated gas removal paper 85 g / m ² . The coconut shell activated carbon content of this paper was 9 g / m ² .

[Coated paper-15 using hydrophilic gas-adsorbing powder]
To 100 parts by mass of iron-containing aluminum hydrate (trade name “Allofemite FP”), 15 parts by weight of an adhesive (trade name “Nipol LX-430”) is added in terms of solid content, and sodium alginate is added as a thickener. A paint having a viscosity of 1500 cps and a concentration of 40% by mass was prepared. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 10 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying furnace. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 85 g / m ² . The content of iron-containing aluminum hydrate in the contaminated gas removing paper was 9 g / m ² .

[Coated paper-16 using hydrophilic gas-adsorbing powder]
15 parts by mass of an adhesive (trade name “Nipol LX-430”) in terms of solid content is added to 100 parts by mass of zinc aluminosilicate mineral (trade name “Mizukanite HP”), and sodium alginate is added as a thickener. A paint having a viscosity of 1500 cps and a concentration of 40% by mass was prepared. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 10 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying furnace. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 85 g / m ² . The content of the zinc aluminosilicate mineral in the contaminated gas removing paper was 9 g / m ² .

[Coated paper-17 using hydrophilic gas-adsorbing powder]
To 100 parts by mass of silica gel (trade name “silica gel PA-270A”), 15 parts by mass of an adhesive (trade name “Nipol LX-430”) is added in terms of solid content, and sodium alginate is added as a thickener to increase the viscosity. Of 1500 cps and a concentration of 40% by mass was prepared. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 10 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying furnace. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 85 g / m ² . The content of silica gel in the contaminated gas removing paper was 9 g / m ² .

[Coated paper-18 using hydrophilic gas-adsorbing powder]
15 parts by mass of an adhesive (trade name “Nipol LX-430”) in terms of solid content is added to 100 parts by mass of silica-alumina gel clay (trade name “Secard TS-35”), and alginic acid is used as a thickener. Sodium was added to prepare a paint having a viscosity of 1500 cps and a concentration of 40% by mass. This paint is applied on one side of the base paper (4) using a comma coater so that the solid content is 10 g / m ² , and the thin paper (1) is applied to the surface of the wet paint layer before entering the drying furnace. Lamination and pressure bonding were followed by drying to obtain a contaminated gas removing paper having a basis weight of 85 g / m ² . The content of silica-alumina gel clay in this polluted gas-removed paper was 9 g / m ² .

[Comparative Example 1]
Contamination with a basis weight of 215 g / m ^{2 in} the same manner as in Example 15 except that the coated paper using the hydrophobic gas-adsorbing powder was changed to coated paper-4 using the hydrophobic gas-adsorbing powder. A gas removal paper was obtained.

[Comparative Example 2]
Contamination with a basis weight of 215 g / m ^{2 in} the same manner as in Example 15 except that the coated paper using the hydrophilic gas-adsorbing powder was changed to coated paper-15 using the hydrophilic gas-adsorbing powder. A gas removal paper was obtained.

[Comparative Example 3]
Contamination with a basis weight of 215 g / m ^{2 in} the same manner as in Example 15 except that the coated paper using the hydrophilic gas-adsorbing powder was changed to coated paper-16 using the hydrophilic gas-adsorbing powder. A gas removal paper was obtained.

[Comparative Example 4]
Contamination having a basis weight of 215 g / m ^{2 in} the same manner as in Example 15 except that the coated paper using the hydrophilic gas-adsorbing powder was changed to coated paper-17 using the hydrophilic gas-adsorbing powder. A gas removal paper was obtained.

[Comparative Example 5]
Contamination with a basis weight of 215 g / m ² as in Example 15 except that the coated paper using the hydrophilic gas-adsorbing powder was changed to coated paper-18 using the hydrophilic gas-adsorbing powder. A gas removal paper was obtained.

Table 2 shows the results of confirming the quality of the gas adsorption performance of the polluted gas-removed paper obtained in Examples 1 to 17 and Comparative Examples 1 to 5. In the table, Examples 1 to 17 Examples 1 to 17 and Ratios 1 to 5 show Comparative Examples 1 to 5. Evaluation was performed as follows. As samples for evaluation, those obtained by cutting the contaminated gas removing papers of Examples 1 to 17 and Comparative Examples 1 to 5 to 5 × 5 cm square were prepared. These samples are pretreated for 24 hours under conditions of a temperature of 23 ° C. and a relative humidity of 50%, then the samples are put in a Tedlar bag, degassed, and injected with 2 liters of various gases prepared to known concentrations. The concentration was immediately measured using a detector tube (manufactured by Gastec Co., Ltd.) at a temperature of 23 ° C., and this was taken as the initial concentration. After leaving the temperature at 23 ° C. for 5 hours, the gas concentration in the Tedlar bag was measured again. The gas adsorption performance of each sample was calculated by subtracting the residual concentration from the initial concentration, and converting it as an adsorption amount (μg) per 1 g of each gas adsorbent powder. The initial concentrations were 300 ppm for propylene oxide and methyl iodide, and 100 ppm for acetic acid, formaldehyde, hydrogen sulfide, xylene, toluene, ammonia, sulfurous acid gas, and nitric acid gas. Table 2 shows the results of measuring the gas adsorption amount (μg) per 1 g of the various polluted gas removing papers described above, and dividing the results into the following four categories. Although the standard differs depending on the type of pollutant gas, it was determined that a mark of “◯” or higher was acceptable as having pollutant gas adsorption performance.
A: Adsorbs polluting gas well.
○: Adsorbs pollutant gas.
Δ: Slightly adsorbs pollutant gas.
X: Contaminated gas is hardly adsorbed.
About propylene oxide: A: 7500 μg / g or more
○: Less than 7500 μg / g to 2000 μg / g or more
Δ: Less than 2000 μg / g to 500 μg / g or more
X: Less than 500 μg / g for methyl iodide ◎: 1500 μg / g or more
○: Less than 1500 μg / g to 1000 μg / g or more
Δ: Less than 1000 μg / g to 500 μg / g or more
×: Less than 500 μg / g Acetic acid, formaldehyde, hydrogen sulfide, xylene, toluene, ammonia, sulfurous acid gas, nitric acid gas A: 1000 μg / g or more
○: Less than 1000 μg / g to 500 μg / g or more
Δ: Less than 500 μg / g to 200 μg / g or more
X: Less than 200 μg / g

<Table 2>

Table 2 shows the following.
(1) In Examples 1 to 17, adsorption performance for various polluted gases is recognized.
(2) Since the amount of activated carbon that is a hydrophobic gas-adsorbing powder is insufficient in Comparative Example 1, the adsorption performance with respect to the fumigating gases propylene oxide and methyl iodide is inferior.
(3) Since Comparative Examples 2 to 5 lack the coating amount of the hydrophilic gas-adsorbing powder, the adsorption performance with respect to VOC and air polluted gas is inferior.
From the above results, it can be seen that Examples 1 to 17 of the present invention can also be used as a fumigation gas removal paper and a VOC or air pollution gas removal paper.

The following describes typical use examples and their effects.
After certain museum storehouse (volume 480m ³⁾ steamed 48 hours Kaoru using propylene oxide (48 g / m ³⁾ and argon gas mixture, forcibly performed 4 days ventilation air inside ventilation The propylene oxide concentration at the time when was completed was 0 ppm. Next, after standing for 24 hours without ventilation, the concentration of propylene oxide was re-measured and found to rise again to 10 ppm. Therefore, the polluted gas removing paper (basis weight is 180 g / m ² ) obtained in Example 1 is installed on the wall surface or storage shelf in the warehouse (use amount: A / V = 0.1 m ⁻¹ ) and ventilated for 24 hours. When the concentration of propylene oxide was measured after leaving without performing the process, it was 0 ppm. Further, it was left unventilated for 72 hours, but the propylene oxide concentration did not rise again, and it was confirmed that there was a removal effect on the fumigation gas.

After the fumigation of a special warehouse (volume: 394 m ³ ) of the Sakai History Museum for 24 hours with gas of methyl iodide (40 g / m ³ ), the air in the warehouse was forcibly ventilated for 24 hours, and the ventilation was completed. The concentration of methyl iodide at that time was 1 ppm or less. Then, after repeating the operation and stoppage of ventilation every 3 hours for 24 hours, the concentration of methyl iodide was measured and found to rise again to 30 ppm. Therefore, the polluted gas removing paper (basis weight is 180 g / m ² ) obtained in Example 6 is installed on the wall surface or storage shelf in the warehouse (use amount: A / V = 0.1 m ⁻¹ ), and 3 again. After repeating the ventilation operation and stopping every hour for 24 hours, the concentration of methyl iodide was measured, and the methyl iodide concentration at the time of stopping ventilation did not rise again, and it clearly has a removal effect on fumigation gas It was confirmed.

The new construction opened before the material exhibition room of some corporation to partition in the center, exhibition room A of each 500m ^3, was B. In the exhibition room A, the pollutant gas removing paper (basis weight is 180 g / m ² ) obtained in Example 6 was hung from the ceiling or wall of the room or laid on the floor (amount used: A / V = 0). .1 ^-1), exhibition room B was left for one month of each material exhibition room as the state of the remains empty. Table 3 shows the results of indoor air quality survey one month later. However, the concentration unit of the pollutant gas is ppb, and the-mark in Table 3 means that it was not detected.

<Table 3>

The following can be understood from the results of Table 3.
(1) It can be seen that the air quality in the exhibition room A is clearly improved over that in the exhibition room B, and the air quality is as good as the outside air.
(2) It can be seen that the pollutant gas removing paper has the ability to adsorb and remove atmospheric pollutants and VOC components such as acid and alkali components in the air.

  The contaminated gas adsorbing paper according to the present invention adsorbs low-concentration residual gas and desorbed gas after fumigation treatment, and prevents the fumigation gas concentration in the warehouse from rising again, as well as storage for new houses and after renovation. It can adsorb pollutant gases such as VOC and air pollutant gas emitted from building materials in the facility, and can be suitably used as an inexpensive and safe pollutant gas removing paper.

FIG. 2 is a schematic view showing a cross section of a contaminated gas removing paper in Example 1 according to the present invention. : It is the schematic diagram which showed the cross section of the contaminated gas removal paper in Example 15 by this invention.

Explanation of symbols

1: Thin paper mainly composed of fiber for papermaking.
2: A coating layer containing hydrophobic gas-adsorbing powder.
3: A paint layer containing hydrophilic gas-adsorbing powder.
4: A base paper mainly composed of paper-making fibers.
5: Adhesive layer.

Claims (4)

On one side of a base paper (4) mainly composed of papermaking fibers, activated carbon was used as a hydrophobic gas-adsorbing powder , and a coating layer (2) mainly composed of an adhesive was formed on the entire surface or partly. Manufacture coated paper, and on the opposite side, use one or more selected from iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel, silica-alumina gel clay as hydrophilic gas-adsorbing powder Then , a coated paper having the coating layer (3) mainly composed of this and an adhesive formed on the entire surface or a part thereof is manufactured, and then a thin paper (mainly made of paper-making fibers) on the front and back surfaces of the coated paper ( 1) A polluted gas removing paper, which is laminated and integrated. On one side of a base paper (4) mainly composed of papermaking fibers, activated carbon was used as a hydrophobic gas-adsorbing powder , and a coating layer (2) mainly composed of an adhesive was formed on the entire surface or partly. to produce a coated paper, followed by coating the coated surface of the coated paper, it is integrated by stacking thin paper (1) mainly composed of papermaking fibers, mainly of papermaking fibers prepared separately group One or more kinds selected from iron-containing aluminum hydrate, zinc aluminosilicate mineral, silica gel, silica-alumina gel clay as hydrophilic gas adsorbing powder on one side of paper (4) and adhesive A coated paper with the paint layer (3) mainly composed of sapphire as a whole or part thereof is manufactured, and then a thin paper (1) mainly composed of papermaking fibers is laminated on the coated surface of the coated paper. and by integrating them, then a hydrophobic gas adsorbing powder and the metallic adhesive The non-coated surfaces of the coated paper having the coating layer and the coated paper having the coating layer mainly composed of the hydrophilic gas-adsorbing powder and the adhesive were bonded via the adhesive layer (5). Contaminated gas removal paper characterized by that.     The pollutant gas removing paper according to claim 1 or 2, wherein the coating layer comprises 10 to 25 parts by mass of an adhesive with respect to 100 parts by mass of the gas adsorbing powder.     The pollutant gas removing paper according to any one of claims 1 to 3, wherein the hydrophobic gas-adsorbing powder is powdered activated carbon having an average particle diameter of 50 µm or less.

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