JPH10153399A - Paper for total heat exchanger and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide paper for a total heat exchanger excellent in latent heat exchange efficiency, of which the total heat exchanger can be manufactured simply only by hot pressing in a corrugating process without deteriorating the total heat exchange efficiency in a total heat exchange structure of a total heat exchanger and its manufacturing method by eliminating a post-treatment process of a heat exchange agent to eliminate a disadvantage such as deformation of the total heat exchange structure after the process. SOLUTION: There is provided a moisture absorbing/desorbing coated layer taking moisture absorption/desorption powder and a binder as main materials on one surface or on opposite surfaces of a base paper containing 10 to 50wt.% of the moisture absorption/desorption power to 20 to 80wt.% of an inorganic component. Further, a bonding agent layer having a thermal bonding property is partly provided on any of the surfaces in the ratio of an area ratio of 20 to 80% and the amount of coating of 5 to 25g/m<2> to ensure moisture absorption/ desorption property and a thermal bonding property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an inorganic powder containing 20 inorganic powders.
A moisture-absorbing / desorbing coating layer is provided on one or both sides of a base paper containing 10 to 50% by weight of a moisture-absorbing / desorbing powder out of 80 to 80% by weight. The present invention relates to a total heat exchanger paper in which layers are partially provided at an area ratio of 20 to 80% and a coating amount of 5 to 25 g / m ² ,
It has high heat exchange efficiency, and is used as a paper heat exchanger that can be easily manufactured.

[0002]

2. Description of the Related Art Most buildings and houses are equipped with air conditioners such as air conditioners in the summer and heating in the winter, so that a comfortable environment can be created regardless of the season. In order to operate such an air conditioner and always create a comfortable environment, the total heat exchanger provided in the air conditioner plays an extremely important role. That is, the good total heat exchange performance of the total heat exchanger leads to a constant and comfortable environment with low energy for a long time.

[0003] Prior to the development of the total heat exchanger, when the air conditioner is operated in a closed room, the air in the room becomes gradually dirty air, and the dirty air is replaced by a method called replacement. I was going. That is, when the air conditioner is operated for a certain period of time in order to exchange dirty air in the room with fresh outside air, the air is opened and ventilated for a sufficient time to ventilate windows and doors.

[0004] However, such a ventilation method can certainly achieve the purpose of taking in fresh air and performing ventilation, but because a higher or lower temperature of outside air is temporarily introduced than in a room, the set temperature is not increased. Extra energy was needed to adjust to humidity.

[0005] A total heat exchanger has been developed to eliminate this extra energy consumption. During cooling operation, the humidity and moisture between the humid and high temperature outside air and the discharged cold air in the room are reduced. It is intended to exchange heat and take in the cooled outside air. During the heating operation, the cool air taken in from the outside exchanges moisture and heat with the warm air in the room to be discharged, so that the warm air is taken into the room. That is, the total heat exchanger has a function of simultaneously performing temperature exchange (sensible heat exchange) and moisture exchange (latent heat exchange) between the discharged air and the taken-in air.

[0006] As the material to be used for the conventional total heat exchanger, roughly two types of materials have been mainly used. That is,
Honeycomb and corrugated metal materials such as aluminum foil baked with silica erosil have been used as a basic type in the form of a laminate or in a rotor shape. However, although these materials are excellent in noncombustibility, the materials themselves have poor moisture absorption and desorption properties, so that a certain or more latent heat exchange efficiency cannot be obtained.

On the other hand, when a material mainly composed of cellulose, such as Japanese paper, is used as the total heat exchanger, it has a higher moisture absorbing and releasing property than the metal material. Although it became possible, in order to further increase the latent heat exchange efficiency, a single-stage corrugating process was performed, and then a heat exchanger such as lithium chloride was added to each of the heat exchanger rotors formed by winding into a roll and molding the rolls. At present, it is attached by performing a weight% impregnation treatment.

However, these impregnation treatments have disadvantages in that the end of the molded rotor is reduced in strength due to strong alkalinity and deliquescent of the heat exchanger, and the shape is easily changed. .

Japanese Patent Application Laid-Open No. 58-51921 and Japanese Patent No. 1823632 proposed by the present applicant discloses a sheet-like material obtained by mixing or applying powder having excellent moisture absorption / release properties in paper.
Although a method for conditioning and preserving arts and crafts and the like is disclosed, it is not intended to be used as a material for a total heat exchanger.

Further, Japanese Patent Application Laid-Open No. H5-115739 discloses that a fiber or powder of a polymer compound having a moisture absorbing and releasing property such as a superabsorbent polymer compound is formed into a sheet together with a natural or synthetic fiber material. And inorganic powders having moisture absorption and desorption properties such as sepiolite, zeolite, bentonite, attapulgite, diatomaceous earth, activated carbon, etc., together with wood pulp, paper,
A humidity exchanger manufactured from a moisture-absorbing and desorbing material that has been formed into a sheet or board and then subjected to corrugation has been proposed. However, in reality, it is limited to use in a total heat exchanger that does not require heat resistance due to poor heat resistance or incombustibility.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a paper-made total heat exchanger for a total heat exchanger and a method for manufacturing the same, which eliminates post-processing of a heat exchanger to prevent deformation of the total heat exchanger after processing. Flame retardant total heat with excellent latent heat exchange efficiency that can easily produce a paper total heat exchanger simply by the heat pressure during corrugating without eliminating the disadvantages and without reducing the total heat exchange efficiency It is intended to provide exchange paper.

[0012]

Means for Solving the Problems As a result of earnest studies, the present inventors have developed a novel total heat exchanger paper which has solved these problems.

The main point is that the inorganic powder is 2
10 to 50% by weight of hygroscopic powder out of 0 to 80% by weight
On one or both sides of the base paper containing, if necessary, provided a moisture-absorbing and desorbing coating layer mainly composed of a moisture-absorbing and desorbing powder and a binder,
It is still another object of the present invention to obtain a total heat exchanger paper characterized in that an adhesive layer having thermal adhesiveness is partially provided on one of the surfaces to impart moisture absorption / release properties and thermal adhesiveness.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The papermaking fibers used in the present invention include softwood unbleached kraft pulp (NUKP), softwood bleached kraft pulp (NBKP), hardwood unbleached kraft pulp (LUKP), and hardwood bleached kraft pulp (LBK).
P), softwood bleached sulphite pulp (NBSP), thermomechanical pulp (TMP) or other wood pulp alone or as a mixture, to which non-wood pulp such as hemp, bamboo, straw, kenaf pulp, and synthesis of polyolefins If necessary, synthetic fibers such as pulp, rayon, vinylon, nylon and polyester, and inorganic fibers such as glass fibers and carbon fibers may be used alone or in combination.

In order to impart flame retardancy to the base paper, the base paper may be subjected to a flame retardant treatment. Examples of the flame retardant include, but are not particularly limited to, guanidine sulfamate, guanidine phosphate, ammonium ammonium sulfamate, and ammonium phosphate.

The inorganic powder used for the base paper of the present invention is:
Clay, kaolin, talc, titanium dioxide, calcium carbonate, aluminum hydroxide and the like are used alone or in combination, but are not particularly limited. However,
In order to improve the flame retardancy, it is preferable to use a self-extinguishing powder such as aluminum hydroxide. The use amount thereof is desirably 80% by weight or less based on the weight of the paper in combination with the above-mentioned hygroscopic powder. When the content is 80% by weight or more, the strength of the paper decreases, and a problem such as breakage of the paper during corrugating occurs, and it is difficult to obtain technically easy papermaking conditions.

The hygroscopic powder used for the base paper of the present invention includes silica gel, silica alumina gel, alumina gel,
Activated alumina, synthetic zeolite, natural zeolite, synthetic silica, acid clay, activated clay, α-sepiolite, β-
Natural or synthetic powders having moisture absorption and desorption properties, such as sepiolite, palygorskite (atattalgite), allophane, imogonite, bentonite, diatomaceous earth, activated carbon, etc., can be used alone or in combination of several kinds. 50% by weight and preferably 15%
~ 45% by weight. If it is less than 10% by weight, the amount of moisture absorption / desorption decreases, and if it is more than 50% by weight, the amount of moisture absorption / desorption increases, but the latent heat exchange efficiency reaches a peak.

The base paper used in the present invention is made from papermaking raw materials and inorganic powders as main materials, mixed with moisture-absorbing and desorbing powders, and further contains various inorganic powders, a dry paper strength enhancer, It is obtained by appropriately adding a paper strength enhancer, a sizing agent, a coloring agent, a fixing agent, and the like, followed by papermaking.

The base paper of the present invention can be impregnated or coated with a known binder within a range that does not impair the moisture absorption / release properties, if necessary, as a powder fall prevention process. As the binder, a synthetic rubber latex such as SBR or MBR, an acrylic emulsion, a vinyl chloride emulsion, a vinylidene chloride emulsion, and a copolymer emulsion thereof, casein, starch, PVA, etc. are used in appropriate combination, but the calorific value is small and difficult. It is preferable to use mainly flammable vinyl chloride or vinylidene chloride emulsion or a copolymer thereof.

The present invention uses a base paper which can be produced by a conventional technique, and provides a moisture absorbing / releasing coating layer mainly comprising a moisture absorbing / releasing powder and a binder on one side or both sides as necessary. As moisture absorbing and releasing properties. As the moisture absorbing and releasing powder,
The powders which are completely the same as described above can be used alone or in combination of several kinds, but it is preferable to use silica gel, activated clay, or the like, which can be easily formed into a paint.

As the binder used in the paint, synthetic rubber latex such as SBR, MBR, acrylic emulsion, vinyl chloride emulsion,
A vinylidene chloride emulsion and a copolymerized emulsion of these, casein, starch, PVA, etc. are used in combination as appropriate, but mainly a vinyl chloride or vinylidene chloride emulsion having a low calorific value and a flame retardant, or a copolymer thereof. Is preferably used.

A dispersing agent is added to one or two or more of the moisture absorbing and releasing powders used in the coating and dispersed in water, and then a binder is added to prepare a coating. At this time, an inorganic powder such as aluminum hydroxide is used. Water retention agents, flow improvers, fungicides, preservatives, coloring agents and the like are added as necessary. Usually, the amount of the binder is preferably 5 to 30% by weight based on 100 parts by weight of the powder. If the amount is less than 5% by weight, the amount of the coating layer as an adhesive is insufficient, so that it is difficult to obtain the required strength of the coating layer itself. If the amount is more than 30% by weight, the binder covers the surface of the moisture-absorbing and releasing powder. Therefore, the moisture absorption / release properties are undesirably reduced.

The coating material thus prepared is applied to one or both sides of the base paper with a coating machine such as an air knife coater, blade coater, roll coater or the like. The coating amount is desirably 5 to 30 g / m ² per side. If it is less than 5 g / m ² , the moisture absorption / desorption properties are poor, and if it is 30 g / m ² or more, the moisture absorption / desorption effect of the base paper mixed with the moisture absorption / desorption powder reaches a plateau.

According to the present invention, a coating layer of a moisture-absorbing and releasing powder is provided on one or both sides of a base paper, if necessary, and then a thermal adhesive layer is partially provided on one side of the base paper. A total heat exchanger paper that can be thermally bonded by the heat pressure during processing or the heat pressure during ultrasonic bonding is obtained.

Usually, as the adhesive exhibiting thermal adhesiveness, a polymer compound having thermoplasticity such as polyvinyl acetate,
Polyacrylates, polyethylene-polyvinyl acetate copolymer, thermoplastic elastomer, ionomer,
Modified ionomer, vinyl acetate copolymerized polyolefin, polyethylene, various waxes, etc. are mainly used.

The coating on the base paper can be performed by any method such as water-based coating, solvent-based coating, hot-melt coating, and extrusion coating, or by using an adhesive. Absent.

However, the thermal adhesive layer in the present invention is
Must be partially provided. The reason is that if a thermal adhesive layer is provided on the entire surface of the base paper, corrugating is applied and when used as a total heat exchanger, one surface of the total heat exchanger paper is a thermal adhesive layer with poor moisture permeability. This is because, as a result of being completely covered, the moisture absorption / release properties are impaired, and the latent heat exchange efficiency is reduced.

In order to partially provide the thermal adhesive layer, it is preferable that an engraving roll such as a gravure roll can be used in the above-mentioned coating machine. This gravure roll has a depth of 50-400μ.
m, engraving such as halftone, rhombus, oblique, straight, curved, etc. at an area ratio of 20 to 80%, and using these rolls, partially apply heat adhesive to one side of the base paper 5 to 25 g / m ²
Apply. The reason for setting these ranges is that the depth of the gravure roll is less than 50 μm, which is too shallow, so that the transfer amount of the adhesive is small and the adhesive strength becomes insufficient.
If the thickness is more than 00 μm, the pickup rate of the thermal adhesive to the base paper will level off. About area ratio, 20%
If it is below, the adhesive strength will be insufficient because the adhesive area is small,
If it is 80% or more, the total heat exchange efficiency is undesirably reduced. If the coating amount is 5 g / m ² or less, the adhesive strength after thermocompression bonding becomes weak due to insufficient adhesive, and the coating amount is 30 g / m 2.
^If it is ² or more, the adhesive strength reaches a peak and the cost increases, which is not preferable.

[0029]

EXAMPLE 1 20 parts by weight of softwood bleached kraft pulp (NBKP) was added to 45 parts by weight.
0 ml C.I. S. F. 30 parts by weight of aluminum hydroxide powder (“B-70”) was added to the pulp slurry obtained by beating
3) (manufactured by Nippon Light Metal Co., Ltd.) and 50 parts by weight of silica gel powder ("Silica Gel PA-200", manufactured by Fuji Silysia Chemical Ltd.) to prepare a 10% concentration slurry. 1% of a wet paper strength enhancer ("WS-570", manufactured by Nippon PCM Co., Ltd.) and a sizing agent ("Size Pine K-902", Arakawa Chemical Co., Ltd.) based on the solid content weight of the slurry.
Was added, and the pH was adjusted to 8 to 8 with aqueous ammonia.
Adjusted to 9. Further, 0.006% of a polymer anionic coagulant (“HYHOLDER 351”, manufactured by Kurita Kogyo Co., Ltd.) is added to this slurry based on the weight of the solid content, and the basis weight is 110 g using a fourdrinier paper machine in a conventional manner. / M ² of total heat exchanger paper was obtained.

Example 2 An adhesive having a thermal adhesive property ("Sumikaflex S-75")
2 ", manufactured by Sumitomo Chemical Co., Ltd.), to which sodium alginate was added as a thickener, having a viscosity of 1500 cps and a concentration of 40%.
Was prepared. Next, the area ratio of the concave portion is 50%,
Using a coating machine provided with a gravure roll engraved to a depth of 100 μm, a heat-adhesive coating liquid was applied on one side of the base paper obtained in Example 1 at a solid content of 10 g / m ² , Basis weight 12
A total heat exchanger paper of 0 g / m ² was obtained.

Example 3 26 parts by weight of softwood bleached kraft pulp (NBKP) and 13 parts by weight of hardwood bleached kraft pulp (LBKP) were mixed.
450 ml C.I. S. F. 30 parts by weight of aluminum hydroxide powder (same as above) and 30 parts by weight of silica gel powder (same as above) were mixed into a pulp slurry obtained by beating to prepare a 10% concentration slurry. Thereafter, a base paper having a basis weight of 80 g / m ² was obtained in the same manner as in Example 1. Furthermore, for 100 parts by weight of silica gel powder (as above) as the main component,
15 parts by weight of MBR latex (“Polylac 750”,
After preparing a coating solution having a concentration of 43% to which Mitsui Toatsu Chemical Industry Co., Ltd. was added, a 15 g / m ² moisture absorbing / releasing coating layer was provided on one side of the base paper using an air knife coater. . Then in the same Naru manner as in Example 2, the heat-adhesive coating liquid was 10 g / m ² coated with solids on the other side, to obtain a total heat exchanger sheet having a basis weight of 105 g / m ^2.

Example 4 On both sides of the base paper having a basis weight of 80 g / m ² obtained in Example 3,
In the same manner as in Example 3, 15 g each of the moisture-absorbing / releasing coating layers
/ M ² , a heat-adhesive coating solution was applied on one surface in the same manner as in Example 2 at a solid content of 10 g / m ^2, and the basis weight was 120
g / m ² total heat exchanger paper was obtained.

Example 5 In the same manner as in Example 3, a heat-adhesive coating similar to that of Example 2 was applied to the other side of a base paper having a basis weight of 95 g / m ² having a moisture absorbing / releasing coating layer on one side. Using a gravure roll engraved with an area ratio of concave portions of 50% and a depth of 350 μm using a coating liquid and a coating machine, the heat-adhesive coating liquid was solid at 25 g / m ^2.
Coating was performed to obtain a total heat exchanger paper having a basis weight of 120 g / m ² .

Example 6 In the same manner as in Example 3, a heat-adhesive coating similar to that of Example 2 was applied to the other side of a base paper having a basis weight of 95 g / m ² having a moisture absorbing / releasing coating layer on one side. Using a coating liquid and a coating machine, using a gravure roll engraved with an area ratio of concave portions of 40% and a depth of 100 μm, applying a thermal adhesive coating liquid at a solid content of 5.6 g / m ² , A total heat exchanger paper having an amount of 100.6 g / m ² was obtained.

Comparative Example 1 Using the base paper having a basis weight of 110 g / m ² obtained in Example 1 and a heat-adhesive coating liquid having the same composition as in Example 2 and a concentration of 20%,
The same gravure roll as in Example 6 was used to apply 2.8 g / m ^{2 of a} thermoadhesive coating liquid as a solid content on one side, and the basis weight was 112.8 g.
/ M ² of total heat exchanger paper was obtained.

Comparative Example 2 Softwood bleached kraft pulp (NBKP) (26 parts by weight) and hardwood bleached kraft pulp (LBKP) (13 parts by weight) were mixed.
450 ml C.I. S. F. 55 parts by weight of aluminum hydroxide powder (same as above) and 5 parts by weight of silica gel powder (same as above) were mixed into a pulp slurry obtained by beating to prepare a 10% concentration slurry. Thereafter, a base paper having a basis weight of 80 g / m ² was obtained in the same manner as in Example 1. Further, a coating solution having the same composition as in Example 3 and having a concentration of 30% was prepared, and a moisture-absorbing / desorbing coating layer was formed on one surface with an air knife coater at 3 g / m 2.
² and using a coating machine provided with an engraved gravure roll having an area ratio of the concave portion of 20% and a depth of 250 μm on the opposite surface, using the same heat-adhesive coating liquid as in Example 2, in 7 g / m ² was applied to obtain a total heat exchanger sheet having a basis weight of 90 g / m ^2.

COMPARATIVE EXAMPLE 3 Using the same base paper and the same coating liquid as in Comparative Example 2, an air knife coater was used to provide a moisture absorbing / releasing coating layer of ² g / m ² on both sides, and then the area ratio of the recess was 90%. %, Using a coating machine with a gravure roll engraved with a depth of 300 μm,
The same heat-adhesive coating liquid as in Example 2 one side 38 g / m ² was applied to obtain a total heat exchanger sheet having a basis weight of 122g / m ^2.

COMPARATIVE EXAMPLE 4 The same adhesive coating solution as in Example 2 was applied to the entire surface of one side of the base paper obtained in Example 1 using an air knife coater to solid-state heat-adhesive coating. The liquid was applied at 30 g / m ² to obtain a total heat exchanger paper having a basis weight of 140 g / m ² .

Using the above-described total heat exchanger paper, the heat-bonded surfaces or the heat-bonded surface and the non-heat-bonded surface are subjected to step rolling under hot pressure using a corrugating machine to obtain a corrugated product. Obtained. A total heat exchanger as shown in FIGS. 3 and 4 was obtained from the obtained corrugated product.

Table 1 shows a corrugated product having a width of 12 cm, which was subjected to E-stage processing using the total heat exchanger papers of Examples and Comparative Examples.
A rotor for a heat exchanger having a diameter of 45 cm was prepared, and the total heat exchange rate and the durability in a practical test were shown. The total heat exchange efficiency is a value at a wind speed of 1.5 m / sec and a pressure loss of 5 mmHg.
A mark of 75% or more is indicated by ◎, and a mark of ○ or more is appropriate. In addition, the durability strength was determined to be unacceptable when the shape was deformed during the operation or when the bonded portion was peeled off, and was acceptable when there was no change.

[0041]

[Table 1]

As described above, the total heat exchanger paper of the present invention has the following remarkable effects.

(1) Using a total heat exchanger paper partially provided with a thermal adhesive layer on a base paper, press-fitting is performed using simple heat or ultrasonic heat using an ordinary corrugating machine. Thereby, a corrugated product can be easily manufactured.

(2) Since the heat absorbing and releasing properties are previously given to the total heat exchanger paper, the latent heat exchange efficiency can be improved without using a deliquescent substance such as lithium chloride.
It is possible to produce a total heat exchanger having good shape retention without a decrease in strength.

(3) The moisture absorbing / releasing coating layer not only reduces the moisture absorbing / releasing performance but also the air permeability, thereby reducing the mixing of the air to be replaced as much as possible and improving the air purifying action.

(4) Since the adhesive is partially applied, the whole heat exchanger having a high latent heat exchange efficiency can be manufactured without significantly impairing the original moisture absorption / release performance of the paper.

(5) Unlike an aluminum plate or the like, it is made of paper and can be incinerated when it becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a total heat exchanger paper in which a base paper is partially coated with an adhesive having a thermal adhesive property in a halftone dot shape.

FIG. 2 is a total heat exchanger paper in which a coating layer containing a moisture-absorbing and releasing powder is provided on both sides of a base paper, and an adhesive having a thermal adhesive property is partially applied in a halftone dot shape.

FIG. 3 shows an example in which a core is formed and a total heat exchanger is formed after corrugating a sheet of the total heat exchanger.

FIG. 4 shows an example in which a total heat exchanger paper is corrugated and then a laminate is formed to be a total heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base paper 2 Adhesive which has thermal adhesiveness 3 Coating layer which has a hygroscopic powder and a binder as a main material 4 Rotor type total heat exchanger 5 Laminated type total heat exchanger

Claims (7)

[Claims] 1. In a base paper made mainly from a papermaking raw material and an inorganic powder, the inorganic powder occupies 20 to 80% by weight of the total weight of the base paper. Total heat exchanger paper characterized in that the wet powder is 10 to 50% by weight. 2. An adhesive layer having thermal adhesiveness on one side of the base paper having an area ratio of 20 to 80% and a coating amount of 5 to 25 g / m ^2.
Total heat exchanger paper characterized in that the paper is partially provided. 3. A moisture absorbing / releasing coating layer mainly composed of a moisture absorbing / releasing powder and a binder is provided on one side of the base paper in an amount of 5 to 30 g / m ^2.
A total heat exchanger paper characterized in that an adhesive layer having thermal adhesiveness is provided partially on the opposite surface with an area ratio of 20 to 80% and a coating amount of 5 to 25 g / m ² . 4. A moisture-absorbing / desorbing coating layer mainly composed of a moisture-absorbing / desorbing powder and a binder is provided on both sides of the base paper in an amount of 5 to 3 per side.
0 g / m ² , and further, an adhesive layer having a thermal adhesive property was provided on one of the surfaces with an area ratio of 20 to 80% and a coating amount of 5 to 5%.
Total heat exchanger paper partially provided at 25 g / m ² . 5. The base paper has a concave portion having an area ratio of 20 to 80.
%, Using a coating machine provided with a gravure roll engraved with a depth of 50 to 400 μm, applying an adhesive layer having thermal adhesiveness to one surface in an amount of 5 to 25 g / m ² and an area ratio of 20 to 8
A method for manufacturing a total heat exchanger paper, which comprises partially coating at a rate of 0% and drying by heating. 6. A moisture absorbing / releasing coating layer mainly composed of a moisture absorbing / releasing powder and a binder is provided on one surface of the base paper in an amount of 5 to 30 g / m ^2.
After the provision of the adhesive layer having heat adhesion, the adhesive layer having thermal adhesiveness is coated with a moisture absorbing / releasing coating using a coating machine provided with an engraved gravure roll having an area ratio of 20 to 80% and a depth of 50 to 400 μm. A method for producing a total heat exchanger paper, which comprises partially applying a coating amount of 5 to 25 g / m ^{2 on} the opposite side of the work layer and drying by heating. 7. A moisture absorbing / releasing coating layer mainly composed of a moisture absorbing / releasing powder and a binder is provided on both sides of the base paper in an amount of 5 to 30 g / m ^2.
After providing the adhesive layer having thermal adhesiveness using a coating machine provided with an engraved gravure roll having a concave portion having an area ratio of 20 to 80% and a depth of 50 to 400 μm, A method for producing a total heat exchanger paper, comprising partially applying a coating amount of 5 to 25 g / m < ² > to the coating and heating and drying.