JPS6278282A - Humidifying wall covering material - Google Patents

Abstract

PURPOSE:To obtain the titled wall covering material having humidity controlling function, by laminating a water absorbing base material on a moisture- impermeable film, e.g. aluminum foil, and applying a coating material containing sepiolite and a highly water absorbing polymer having a specific particle diameter if a specific pigment volume concentration to the resultant laminate. CONSTITUTION:A water absorbing base material, e.g. woven fabric such as cotton or wool, is laminated on a moisture-impermeable film having >=250 m<2>.hr.mmHg/g moisture permeation resistance, e.g. aluminum foil or stainless steel foil, through an adhesive and a coating compound containing a material containing sepiolite and highly water absorbing polymer powder having <=50mu particle diameter, e.g. polymer of a monomer having polyoxyethylene chains or carboxylic acid side chains, as essential components and having >=55% pigment volume concentration (titanium oxide or talc, etc., is contained as a pigment) further applied to the resultatnt laminate to afford the aimed humidifying wall covering material. Since the wall covering material has function to moderate fluctuation of indoor humidity, it can be extensively utilized for interior materials and further ships' cabin and automobile interior materials, etc.

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 mitigating and alleviating fluctuations in indoor humidity. It can be widely used in the transportation equipment industry such as in cabins, automobiles, etc.

(Prior art) Conventionally, it has been possible to use devices such as air conditioners that consume electric power, such as air conditioners, to make the living environment more comfortable and to control the room. Not only is it not economical to do so, but if the equipment is not operated due to the absence of a resident or equipment failure, control becomes impossible and condensation may occur.
Mold often grows and deteriorates the living environment of the room.

Additionally, there has been a parasifu fishing method in which the material has moisture absorption and release functions, as seen in the rough clay walls of Japanese walls. However, these materials with absorbing/releasing M functions and relatively high moisture control ability have a non-7:i property and not only have poor workability, but also have poor workability when coated with interior finishing materials, etc. That profound sense of humor would also disappear.

In addition, the humidity control power referred to here refers to the ability to control humidity by 1 °C for a 1 °C change in temperature.
It is the amount of moisture absorbed and released per unit area by the material with variable absolute humidity divided by the variable temperature, multiplied by the indoor air volume, and then divided by the total internal surface area of the material. (The problem that the invention attempts to solve) The problem that the invention attempts to solve is
The problem lies in the ease with which walls can be constructed, which have a strong humidity control function, and the humidity control ability is limited depending on the wall covering material that covers the wall surface.

(Means for solving gaps and illumination points) In the present invention, the wall covering material covering the surface of the wall has: +, ++ moisture horns so that the humidity control ability is not limited, and at the same time, it is finished in a thin piece. It is designed to be as easy to install as traditional wall coverings.

The structure for this purpose consists of laminating a moisture-absorbing film on a moisture-impermeable film, which contains sepiolite and a super absorbent polymer with a particle size of 50μ or less as essential components, and PVC55.
We have invented a moisture-controlling wall covering material coated with more than 50% of paint.

The non-moisture permeable film constituting the present invention refers to a film with an extremely small amount of permeability such as aluminum foil, stainless steel foil, and volidine film, for example, a film with a moisture permeation resistance value of at least 250 C.
m'·h-mmHg/g) or higher is desirable.

This moisture permeation resistance value is 250 (m' -h-mml-(g
/ g) In the following, when a moisture-controlling wall covering material is attached to a base such as a concrete wall, moisture that exists as surplus water in the concrete or mountain water that enters from causes such as water leakage may be absorbed by the wall covering material. It migrates from the back side to the surface layer, which will be described later, and not only impairs its original humidity control function, but if the moisture control performance is not isolated from the base material, it will be compounded with the breathability of the base material, resulting in particularly long-term release. The recording performance deteriorates, and as a result, the ml
There is a tendency for the force itself to decrease.

The water-absorbing base material referred to in the present invention may be the same as the base material normally used for commercially available wallpapers, etc., but since we consider moisture absorption and desorption properties to be an important objective, moisture-absorbing cotton, Woven fabrics made from plant fibers such as hemp and palm, animal fibers such as hair and silk, recycled fibers, semi-synthetic fibers, and synthetic fibers are suitable.

Sepiolite in the present invention is a type of clay mineral,
It has fibrous crystals and has a very large specific surface area (230~30
0 m'/g). In addition, it has a property that is particularly compatible with water and alcohol, so it has excellent ability to absorb and retain water.

In the present invention, water is made to exist as capillary water, and this is for the same reason as the adjustment of the pigment volume concentration, which will be described later.

Next, the types of super absorbent polymer in the present invention are as follows:
Modified starch, cellulose type, acrylonitrile grafted starch hydrolyzate type, polyacrylonitrile derivative type, polyacrylamide type and polyacrylate type, saponified vinyl acetate/medyl acrylate copolymer type, and boriooxoedilane type. Also, the hydrophilic group is a polyogine dilane chain or a carboxylic acid side chain.

In addition, nonionic systems such as polyvinylpyrrolidone and borihinyl alcohol, polystyrene sulfonic acid, and poly-2
There are also crosslinked products of sulfonic acid-based polymers such as -acrylamide-2-methylpropanesulfonic acid.

Then, the particle size of this super absorbent polymer is set to 50μ or more TL'1
Day ++ ++MIJ (n,,
If f
This is because when -h *4 +- is used, when the dried coating film absorbs water, the coating film is destroyed due to the volumetric expansion of this polymer.

Pigment volume concentration in the present invention, that is, PvC is 55%
The above-mentioned paint refers to one in which the volume of the pigment occupies 55% or more of the solid content of the vehicle and pigment, which are the main components of the paint. Usually, a paint is composed of a vehicle, a pigment, and, if necessary, auxiliary agents such as a dispersant, a wetting agent, and a preservative, and the ratio of the vehicle to the pigment varies depending on the above-mentioned PvC. Sepiolite, which is the main component of the paint of the present invention, and a super absorbent polymer with a particle size of 50 μm or less are calculated as one of the pigment components.

Therefore, the paint vehicle used in the present invention includes:
Synthetic resin emulsions (e.g. styrene and its derivatives, vinylidene chloride, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, maleic acid or fumaric acid, or such acids such as methyl, ethyl, propyl or butyl) ester derivatives, nitrile derivatives, acid amide derivatives, hydroxyethyl acrylate or -methacrylate, hydroxypropyl acrylate or -methacrylate, vinyl acetate,
Consisting of monomers such as allyl alcohol and allyl ester, and monomers, or polymers or mixtures of two or more of them. ), film-forming aids, preservatives, etc. are used.

Pigments include titanium oxide, talc, clay, zinc oxide, various coloring pigments, calcium carbonate, silica powder, etc.
In addition, sepiolite as an essential component and super absorbent polymer powder with a size of 50μ or less are used.

Furthermore, in the present invention, various additives that can be used in general paints can be blended within a range that does not impair the purpose of the present invention. Additives include surfactants such as dispersants, wetting agents, antifoaming agents, foaming agents, emulsifiers, and antistatic agents, as well as organic solvents such as film-forming agents, freeze stabilizers, and plasticizers, and methyl cellulose. , polyvinyl alcohol, hydroxymethylcellulose, sodium polyacrylate, guar gum, and other thickeners.

(Function) The paint used for the humidity-controlling wall covering material 1 of the present invention has moisture-controlling power (water absorption and moisture release properties) and contains sepiolite and super-absorbent polymer powder in its paint components, so it can be applied easily after drying. It forms a film and has strong moisture control power. At the same time, since the PVC content is 55% or more, the moisture conditioning ability is not inhibited by the binder resin in the vehicle.

(Example) Hereinafter, a method for manufacturing the humidity control wall covering material of the present invention will be explained with reference to the drawings.

First, the fabric 3 as a water-absorbent base material is laminated onto the non-moisture-permeable film 1 using an adhesive (2). Powders, varnishes, or emulsions of thermoplastic resins, powders, varnishes, or emulsions of thermosetting resins such as polyesters, acrylic esters, bisphenol-type epoxies, polyisocyanates, and phenols can be used.

Furthermore, it is coated with a paint containing sepiolite and super absorbent polymer particles with a particle size of 50 μm or less as essential components, and is made of PVC of 55% or more, and dried to become a moisture-controlling wall covering material.

When actually using this wall covering material, an adhesive is applied to the moisture-impermeable film side and the material is attached to a wall surface or the like.

Example 1 Aluminum foil was used as a moisture-impermeable film, and a cotton fabric was attached via an acrylic ester adhesive. and,
It was manufactured by coating it with a paint of paint formulation 1.

(Paint formulation 1) Raw material formulation
Amount: Synthetic resin emulsion 283 parts by weight (7 mm / φ? '7 II II / Kll m -N
V = Fl n %) titanium oxide
42 parts by weight Calcium carbonate 270 parts by weight Sepiolite 230 parts by weight Super absorbent polymer 2 parts by weight (30 μ, isobutylene maleic acid type) Water 380 parts by weight Additives 10 parts by weight (PVC 60%) Example 2 Polyethylene film as moisture-impermeable film (Use one with a moisture permeability resistance of 300+n2・h-mmmm1 (/g),
After corona discharge machining, a woolen fabric was attached using a vinyl acetate adhesive. Then, a coating material of coating composition 2 was coated thereon to produce a sample.

(Paint formulation 2) Raw material formulation
Quantity Synthetic resin emulsion 230 parts by weight (acrylic acid ester composition, NV=50%) Titanium oxide
42 parts by weight calcium carbonate 27
0 parts by weight Sepiolite 230 parts by weight Super absorbent polymer 2 parts by weight (50 μ, polyacrylic acid sorter type) Water 380 parts by weight Additive 10 parts by weight (PVC 65%) Comparative examples were prepared using the composition shown in Table 1 below. did. The same materials as in Example 1 were used for the water-absorbing base material, adhesive, and superabsorbent polymer, and superabsorbent polymers with different particle sizes were also tested.

In Table 1, A indicates the material used for the moisture-impermeable film or the material used for comparison.

In addition, B (in Table 1) indicates the characteristics of the paint used in Comparative Example, so the PVC value of the paint, the presence or absence of sepiolite and super-absorbent polymer, and the particle size type of the super-absorbent polymer are shown.

Table 1 The coating composition is shown in Table 2 below. The numerical values are parts by weight, and the same synthetic resin emulsion as in Example 1 was used.

Table 2 Table 3 shows the results of testing the humidity control performance and weather resistance of the wall covering materials according to these Examples and Comparative Examples. In this table, a commercially available woven wall fabric was also included in the same test as Comparative Example 6. The moisture control power after one week in this table refers to the wall covering material attached to a 10 cm thick concrete plate, and after one week had elapsed, the humidity control power was measured.

Accelerated weather resistance was tested on Sanya Inn Weather Meter 2.
The surface condition after 00 hours was visually evaluated. In this visual evaluation, those with no abnormalities were marked as ○, and those with abnormalities such as cracks and blisters were marked as ×.

Table 3 (Effects of the Invention) It can be seen that the moisture-controlling wall covering material according to the present invention not only has a much higher R'fl=force than conventional wall fabrics, but also maintains its moisture-controlling ability. As can be seen from the results of accelerated weathering, it is estimated that there will be no abnormalities for several years under normal usage conditions.

As described above, the humidity-controlling wall covering material of the present invention has high humidity-controlling power and durability, and it has become possible to obtain a humidity-controlling effect similar to that of conventional Japanese walls simply by pasting it on a wall surface.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view showing the structure of the humidity control wall covering material of the present invention. I... Moisture-impermeable film, 2... Adhesive, 3...
Water-absorbing base material, 4...paint

Claims (1)

[Claims] Sepiolite and particle size 5 are layered on a moisture-absorbent base material such as aluminum foil or stainless steel foil
A moisture-controlling wall covering material coated with a paint containing super absorbent polymer particles with a particle size of 0μ or less as an essential component and having a pigment volume concentration (hereinafter referred to as PVC) of 55% or more.