JPH0374907B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a humidity-controlling wall covering material that has the function of alleviating fluctuations in indoor humidity.The present invention can be used not only in the interiors of buildings but also in transportation machines such as ship cabins and automobiles. It can be widely used in the instrument industry. (Conventional technology) Traditionally, as a method to make the living environment comfortable,
Temperature control and humidity control have been carried out. These control methods can be achieved using devices that consume electrical energy, such as air conditioners, but they are not only uneconomical because they involve energy consumption, but also when the occupants are absent or the devices are turned off. If the device is not operated due to a malfunction or the like, control becomes impossible, which often causes condensation or mold to grow, deteriorating the living environment of the room. Additionally, there have been passive methods in which materials have moisture absorption and release functions, as seen in the rough earth walls of Japanese walls. However, these materials that have moisture absorption and desorption functions and relatively high moisture control ability are not only very thick and have poor workability, but also have poor moisture control ability when coated with interior finishing materials, etc. It was also something that would disappear. The humidity control power referred to here refers to the amount of moisture absorbed and released per unit area when the temperature fluctuates by 1°C. divided by the total internal surface area of the material. And, as a sheet with moisture control power, it was published in Japanese Patent Publication No.
-There was a sheet disclosed in Publication No. 9051. However, the humidity control ingredients used include potassium dichromate, sodium hydroxide, etc., which were deliquescent, readily water-soluble, and toxic, making them unsuitable for use in residential environments. In addition, there was a siding disclosed in Japanese Utility Model Application Publication No. 57-110214 in which granular water-absorbing material was attached to the surface of the siding. It was hot. (Problems to be Solved by the Invention) The problems of the prior art are the ease of constructing a wall with a humidity control function and the fact that the humidity control ability is limited depending on the wall covering material that covers the wall surface. be. (Means for Solving the Problems) In the present invention, the wall covering material used by pasting it on the surface of the wall has moisture control ability so that the moisture control ability is not limited, and at the same time, it can be completed in the form of a thin sheet. It has become a standard material, making its installation as easy as traditional wall coverings. As a structure for this purpose, in the present invention, an isobutylene maleic acid copolymer is selected as a material with moisture conditioning ability, and the crosslinking reaction of this polymer is
It is made to be carried out on a non-woven fabric of g/m ² or more, and is laminated with aluminum foil to eliminate the influence of moisture on the adhesive base and flame retardant paper to make it easier to adhere. In the structure of the present invention, the nonwoven fabric may be made of fibers such as rayon, polyester, acrylic, Teflon, nylon, or the like, used alone or in combination. In addition, the manufacturing methods include dry nonwoven fabrics (e.g., dipping method adhesive type, felt method mechanical bonding type, staple fiber method spinning type), wet nonwoven fabrics (e.g., fibrica method papermaking type, thermopressure method papermaking type,
Adhesive method (paper making method), etc. In addition, the basis weight of the nonwoven fabric used in the present invention is 80
g/m ² or more is desirable. If it is less than 80 g/m ² , the nonwoven fabric becomes thin or rough, and when the polymer solution described below is applied, it penetrates uniformly into the front and back surfaces of the nonwoven fabric, and as a result, the moisture control wall covering material of the present invention cannot be applied. When this happens, the polymer is exposed on the indoor surface, which is not only aesthetically undesirable, but also when touched by people.
Not only does it feel bad to the touch, but adsorption of foreign substances other than moisture causes problems in humidity control performance. The isobutylene maleic acid copolymer referred to in the present invention is a copolymer of isobutylene and maleic anhydride, and the composition ratio thereof is within a range such that the composition produced by reacting with an alkaline substance is soluble in water. That's fine. Further, the crosslinking agent used in the present invention may be any compound as long as it can partially crosslink the water-soluble isobutylene maleic acid copolymer produced by reacting with the above-mentioned alkaline substance.
Compounds having two or more epoxy groups in the molecule are preferred. Examples thereof include polyhydric alcohols such as glycerin diglycidyl ether and ethylene glycol diglycidyl ether, diglycidyl ether of bisphenol A, dimer acid glycidyl ester type epoxy resins, metal-containing epoxy resins, and the like. The addition ratio of the crosslinking agent to the isobutylene maleic acid copolymer is preferably in the range of 0.1 to 5 mol % based on the derivative group thereof. Below this range (0.1 mol % or less), the water absorption capacity of the obtained crosslinked product is too high, and due to expansion of the crosslinked product, there is a possibility that the nonwoven fabric will be torn or peeled off during adhesive use. On the contrary, above this range (5 mol%
(above), the gel strength increases too much and the water absorption capacity decreases. When applying the mixed solution to the nonwoven fabric,
First, isobutylene maleic acid copolymer is dissolved in water, and a thickener is used to increase the viscosity to over 100 poise. The thickeners may be those commonly used in water-based paints, such as hydroxymethylcellulose, methylcellulose, various acrylates, guar gum, montmorillonite,
Examples include fibrous magnesium silicate. The amount added is set so that the viscosity after thickening is 100 poise or more. The addition and mixing of the crosslinking agent should be carried out immediately before coating. This is due to the pot life problem caused by the crosslinking reaction. Regarding the viscosity setting, if the viscosity is 100 poise or less, when applying the above-mentioned mixed solution containing a crosslinking agent to the nonwoven fabric, this solution will be applied to the opposite side of the nonwoven fabric to the application side (indoor surface when used as a humidity control wall covering material). ). As a result, similar to the above-mentioned explanation of the basis weight of the nonwoven fabric, there are problems in terms of aesthetic appearance, finger feel, and sustainability of humidity control. In addition, the above-mentioned mixed solution includes calcium carbonate,
Fillers such as silica powder, mica, diatomaceous earth, kaolin, and talc, flame retardants such as halogen-based and phosphorus-based flame retardants, coloring pigments, PH adjusters, dispersants, etc. may be used as long as they do not impair the purpose of the present invention. I can do it. Next, the aluminum foil, which is a component of the present invention, is used to form a moisture-impermeable layer to prevent moisture movement from the base to which it is attached, thereby maximizing the water absorption ability of the moisture-controlling wall covering material. . In view of moisture impermeability and bendability, the aluminum foil may have a thickness of about 1 μm to 50 μm in actual use. Furthermore, the flame-retardant paper used in the present invention refers to paper that has been subjected to a flame-retardant treatment, such as that which is normally used as a backing paper for wallpaper as a wall covering material. (Function) The moisture control wall covering material of the present invention has excellent moisture control ability due to the excellent moisture absorption ability of the crosslinked isobutylene maleic acid copolymer, and due to its structure, it is not affected by moisture from the base material. Not at all. Furthermore,
The nonwoven fabric located on the surface side during construction can be given any design by dyeing or printing. (Example) Hereinafter, a method for producing a moisture-controlling wall covering material of the present invention will be explained with reference to the drawings. First, a nonwoven fabric 1 having a basis weight of 80 g/m ² or more is prepared. On the other hand, a solution of isobutylene maleic acid copolymer is thickened with a thickener to have a viscosity of 100 poise or more, and a crosslinking agent in a specified molar ratio is added and mixed to prepare a solution. Next, using a coating device such as a knife coater, flow coater, bar coater, or spray, the mixed solution 2a containing the aforementioned polymer is coated.
is applied onto the nonwoven fabric. At this time, it is preferable that the coating liquid stops permeating from the painted surface of the nonwoven fabric to 2/3 or less of the thickness of the nonwoven fabric. Since the crosslinking reaction can be carried out more efficiently after painting, a drying and heating treatment (approximately 110°C, 5 minutes) is performed immediately after painting. Then, aluminum foil 3 is laminated with adhesive 5 on the polymer crosslinked body side of the humidity control base fabric 10, in which the polymer crosslinked body 2b is formed on one side and in a semi-permeable state. Wall covering material 20 is manufactured. In the following description, examples and comparative examples of humidity control wall covering materials will be given to explain their performance. In Example 1, a polyester nonwoven fabric with a basis weight of 100 g/m ² was prepared, and an isobutylene maleic acid copolymer polymer was prepared.
Mix and stir 100g of water at a ratio of 300g of water and 8g of hydroxyethyl cellulose as a thickener.
When the viscosity exceeds 100 poise, add and mix 1 mol% of ethylene glycol diglycidyl ether as a crosslinking agent to the polymer ratio, and immediately apply approximately 150 poise onto the nonwoven fabric.
It was coated using a bar coater so that the coating weight was 2 g/m ² .
Next, the coated nonwoven fabric is heated at 110℃ in a hot air dryer.
Dry and crosslink for 5 minutes. After drying, a 12 μm thick aluminum foil was attached to the polymer-coated side of the moisture control base fabric using an acrylic ester adhesive, and then 70 g/m ² of flameproof paper was attached using an acrylic ester adhesive. In Example 2, the nonwoven fabric of Example 1 was replaced with a flame-retardant nylon nonwoven fabric with a basis weight of 120 g/ ^m2 , and glycerin diglycidyl ether was used instead of ethylene glycol diglycidyl ether, and the polymer ratio was 1.5 mol%. The coating amount was approximately 150 g/m ² . A humidity control wall covering material was produced in the same manner as in Example 1 except for the above. In the comparative example, as shown in the first bale below, flame-retardant nylon nonwoven fabric with a basis weight of 60 g/m ² and 100 g/m ² and the viscosity after thickening of the solution of isobutylene maleic acid copolymer were used. were set to 200 poise and 80 poise, and the coating amount was set to the values in Table 1 (g/
m ² ), and a wall covering material was produced in the same manner as in Example 2 except for the following. The appearance and moisture control ability (when attached to a 10 cm thick concrete board) of these Examples and Comparative Examples were measured and the results are shown in Table 2. As Comparative Example 5, a commercially available wallpaper was added to the comparative example, and its humidity control ability was measured.

【table】

[Table] Subsequently, in order to see the sustainability of the humidity control power, the humidity control power was measured again after being left outdoors for 3 weeks. The results are shown in Table 3.

[Table] (Effects of the Invention) It can be seen that the humidity control wall covering material according to the present invention has higher humidity control power than conventional wallpaper. In addition, it can be seen that its moisture regulating power is maintained continuously. By taking advantage of this humidity control ability and ease of construction, the indoor temperature will not change rapidly, eliminating dew condensation and mold growth, and making the living environment more comfortable.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view showing the structure of the present invention, and FIG. 2 is a schematic diagram showing an example of the manufacturing method of the moisture-controlling wall covering material of the present invention. 1... Nonwoven fabric, 2a... Mixed solution containing isobutylene maleic acid copolymer, 2b... Polymer crosslinked product, 3... Aluminum foil, 4... Flame retardant paper, 5... Adhesive, 10... Moisture control base fabric, 20... Humidity control wall covering material.

Claims (1)

[Claims] 1. A mixed solution of an isobutylene maleic acid copolymer and a crosslinking agent adjusted to a viscosity of 100 poise or more is applied to a nonwoven fabric having a basis weight of 80 g/m ² or more, and the solution is allowed to penetrate halfway through the nonwoven fabric layer, and then heated to remove the polymer. A moisture-controlling wall covering material, characterized in that a crosslinked product of the above is produced on a non-woven fabric, and aluminum foil and flameproof paper are further laminated and adhered to the surface coated with the above-mentioned mixed solution.