JPH0531846A - Heat-resistant wallpaper - Google Patents

Abstract

PURPOSE:To provide heat-resistant wallpaper enhanced in safety by the enhancement of fire retardancy and the decrease of a combustion speed and the reduction of harmful gas at the time of a fire and excellent in antistaining properties and dimensional stability. CONSTITUTION:The present heat-resistant wallpaper is formed by laminating ceramic impregnated base cloth A, a non-combustible and non-meltable heat- resistant film B, design layer C and a hard layer D whose pencil A hardness is H or more in the order of D/C/B/A or D/B/C/A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant wallpaper which is flame-retardant and has excellent safety in case of fire, and whose surface is not easily soiled and whose soil is easily removed.

[0002]

2. Description of the Related Art Conventionally, a typical wallpaper is commercially available.
A polyvinyl chloride resin (hereinafter abbreviated as PVC) layer containing a plasticizer, a colorant, a filler and the like is formed on various base materials such as paper and knitted fabric by a calendar method or a coating method, and the polyvinyl chloride resin layer It has a structure in which a design layer is formed by applying printing, foaming printing, chemical embossing or mechanical embossing on the surface.

However, although the PVC layer of this wallpaper has self-extinguishing property, it is easily melted by heat, so that when it comes into contact with a fire such as a cigarette fire, it melts and drips to form a hole. It cannot be said that the flame retardancy is sufficient because the material layer is spread. In addition, there is a big problem that PVC is thermally decomposed to generate a large amount of toxic chlorine gas when a fire becomes intense and the temperature becomes high, which poses a risk to human life. On the other hand, as wallpaper, stains and the like are easily taken in by the plasticizer in the PVC layer, and are easily soiled.
Since the solvent resistance of the VC layer is poor, it cannot be removed using thinner or benzine. Further, this wallpaper has a drawback that the dimensions change (expansion and contraction) due to changes in the ambient temperature, so that a gap is created in the connection portion and the design effect is impaired.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to enhance safety by improving flame retardancy, slowing down the burning rate in a fire, and reducing toxic gas, and having excellent pollution resistance and dimensional stability. To provide heat-resistant wallpaper.

[0005]

The object of the present invention is to provide a ceramic-impregnated base fabric A, a non-combustible / infusible heat-resistant film B, a design layer C and a hardened layer D having a hardness of pencil hardness H or more. This can be achieved by heat-resistant wallpaper laminated in the order of D / C / B / A or D / B / C / A. In the present invention, the pencil hardness H or higher, which indicates the hardness of the hardened layer D, refers to JIS
The value measured according to the pencil scratching method specified in K5400.

As described above, since the heat-resistant wallpaper of the present invention is provided with the non-combustible / non-combustible heat-resistant film B on the surface thereof, it may be melted and drip to form holes even if it is directly contacted with a high-temperature fire or flame. Absent. Further, since the ceramic-impregnated base fabric A is flame-retardant, it does not burn or spread and significantly enhances the flame-retardant property of the wallpaper. In addition, not only does it decompose thermally to generate no toxic gas, but it also slows down the burning rate in the event of a fire, thus significantly improving safety. Further, the wallpaper has good stain resistance and dimensional stability due to the heat-resistant film B which is smooth and has heat stability (heat resistance).

FIG. 1 shows one of such heat-resistant wallpaper of the present invention.
It is sectional drawing which shows an example. As shown in FIG. 1, a heat-resistant wallpaper 1 of the present invention comprises a ceramic-impregnated base fabric A, a non-combustible / infusible heat-resistant film B, a design layer C, and a hardened layer D having a hardness of pencil hardness H or more. It has a structure in which D / C / B / A is laminated on the cloth A in this order. The ceramic-impregnated base fabric A constituting the heat-resistant wallpaper of the present invention is made into a ceramic by impregnating and adhering an inorganic compound or a silicone compound to paper, woven fabric, non-woven fabric, etc., and imparts flame retardancy by this ceramicization, It is designed not to burn or spread in the event of a fire. Examples of the inorganic compound include inorganic phosphorus compounds such as ammonium phosphate, nitrogen-containing compounds such as inorganic acid ammonium salts, metal hydroxides such as aluminum hydroxide, sodium silicate such as water glass, calcium carbonate, calcium hydroxide. .. The amount of the inorganic compound or silicone compound impregnated into the base fabric such as paper, woven fabric, and non-woven fabric may be an amount sufficient to impart flame retardancy to the paper, woven fabric, non-woven fabric, and the like, which are ceramics, and are not particularly limited. It is not something that will be done.

The heat-resistant film B is preferably a film obtained from an incombustible / infusible organic polymer, preferably an organic polymer having a property of carbonizing at a temperature of at least 500 ° C. Examples of such organic polymers include aromatic polyamides, polyimides and polyamideimides. If the thickness of this heat-resistant film B is too thick, the flexibility or flexibility of the wallpaper will decrease, and the handleability as wallpaper will deteriorate,
If it is too thin, the heat insulating property and strength will decrease. Preferably 6 to 1
It is preferable to set it to about 00 μm.

The design layer C is not particularly limited as long as it gives a design effect to the wallpaper surface such as a coloring layer, a printing layer, a vapor deposition layer of metal or the like, a metal foil, and an uneven pattern layer such as embossing. Not something. The design layer C can be laminated on the front surface or the back surface of the heat resistant film B, or may be laminated on both front and back surfaces. As the colored layer, a coating layer of a colorant,
There is a coating layer made of a synthetic resin to which a colorant is added. In addition, as the printing layer, there is a layer in which a pattern, a character or the like formed by applying ink to the plate surface by printing such as gravure, offset or screen is transferred. As the ink for this transfer layer, an organic solvent type ink, an oil-based ink, a UV ink or the like having good adhesion to the heat-resistant film B is used, and the printing may be full-surface printing or partial printing. Furthermore, as a vapor deposition layer, it is heated and evaporated in a high vacuum such as aluminum,
There is one that forms an adhered thin film on the surface B of the heat resistant film.

The heat-resistant wallpaper of the present invention is provided with a hardened layer D having a pencil hardness of H or higher on the surface of the design layer C or the surface of the heat-resistant film B. By providing the hardened layer D, it is possible to protect the design layer C, prevent scratches on the surface (scratch resistance), and improve gloss, stain resistance, solvent resistance, heat resistance, and the like. The hardened layer D is a layer made of various hard coating agents applied to harden and protect the surface of the plastic. Examples of the hard coat agent include organosilane compounds such as methyltriethoxysilane and phenyltriethoxysilane, melamine compounds such as etherified methylolmelamine, and fluorine-containing compounds such as chlorotrifluoroethylene and tetrafluoroethylene. is there. The hardened layer D is a method of applying the above-mentioned hard coating agent on the design layer C of the heat-resistant wallpaper and thermally hardening it (thermosetting method), a polyfunctional acrylate type such as polyol acrylate, polyester acrylate, urethane acrylate. Alternatively, a method in which an organosilane compound is cured by using activation energy rays such as ultraviolet rays, electron beams, and radiation (activation energy ray curing method), plasma polymerization methods for various organic compounds and organosilanes, metal-containing compounds, cermets , A ceramic polymer sputtering method, an ion plating method for metals or alloys (generally referred to as a deposit method), and the like.

As a method for producing the heat-resistant wallpaper of the present invention, there is a method in which the heat-resistant film B is bonded onto the ceramic-impregnated base fabric A and then the design layer C is formed on the surface thereof.
As the heat-resistant film B, a film on which the design layer C is formed in advance may be used. The ceramic-impregnated base fabric A can be made into ceramic by bonding a heat-resistant film B to a base fabric such as paper or nonwoven fabric, and then impregnating and adhering an inorganic compound or a silicone compound.

As the adhesive for joining and integrating the ceramic-impregnated base fabric A and the heat-resistant film B, for example, a reactive or self-crosslinking polyacrylic ester adhesive,
Thermosetting urethane-based adhesives, epoxy-based adhesives, polyimide-based adhesives with excellent heat resistance, polyamide-imide-based adhesives and flame-retardant are mixed to give flame-retardant adhesives,
Alternatively, a hot-melt adhesive such as polyamide or ethylene-vinyl acetate copolymer can be used.

The hardened layer D can be formed by applying the above-mentioned hard coat agent on the design layer C, coating with a spray or the like, and hardening. Such a heat-resistant wallpaper of the present invention is useful as a wallpaper for various buildings because of its excellent flame retardancy, fire safety, stain resistance, and easy removal of stains. It is also useful as a coating material for automobile interior materials and furniture.

[0014]

EXAMPLE A ceramic-impregnated base cloth obtained by impregnating (aluminum hydroxide) a plain woven fabric composed of polyester fiber / rayon mixed fiber yarn having a mixed spinning ratio (weight ratio) of polyester fiber and rayon of 50/50, Dupont thickness is about 25μm
The polyimide film of No. 2 was joined by using a urethane adhesive "SEICA BOND" E260 / X26) manufactured by Dainichiseika.

Then, a design layer was formed by pattern printing on the surface of the aromatic polyimide film. The surface of this design layer is sprayed with a hard coat liquid with a solid content concentration of about 30%, which is a mixture of organosilane consisting of a mixture of methyltriethoxysilane and phenyltriethoxysilane and a curing catalyst, and heated at 110 ° C for about 1 hour. Then, a cured layer having a thickness of about 2 μm was formed.

With respect to the obtained wallpaper of the present invention, the following cigarette fire type melting test, 45 degree surface ignition test, surface test,
A combustion test and a stain resistance test were conducted, and the results are shown in Table 1. For comparison, the same test was performed on a commercially available polyvinyl chloride wallpaper, and the results are shown in Table 1. Cigarette fire type melting test : The ash of the ignited tobacco was dropped on the wallpaper surface, and the presence or absence of melting and holes was observed. 45 degree surface ignition test : According to the method specified in JISA1322, a 45 cm × 30 cm test piece
The city gas flame was contacted in air for 10 seconds while being inclined, and the combustion state was observed and evaluated. Surface test : The area tdθ (° C x minutes) of the part surrounded by the exhaust temperature curve and the standard temperature curve and the smoke coefficient CA were measured according to the method specified in JIS A1321. Combustion test : Existence of an irritating odor when burned with a gas lighter was examined. Contamination resistance test : Toner powder used in a copying machine was adhered to the surface of the wallpaper and left in an atmosphere of 40 ° C. and 80% RH for 24 hours, and then wiped with a rag to examine the removal state of the toner powder.

[0017] It can be seen from Table 1 that the product of the present invention is superior in flame retardancy and safety in case of fire and is superior in stain resistance as compared with the conventional commercial product.

[0018]

According to the present invention, the surface of the flame-retardant ceramic-impregnated base fabric A is melted and drips even if it is brought into direct contact with the fire, or is thermally decomposed even when heated to a high temperature to generate a toxic gas. Since the non-combustible / infusible heat-resistant film B that does not burn is provided, the flame retardancy of the wallpaper is remarkably strengthened, the burning rate at the time of fire is reduced, and no toxic gas is generated, thus improving safety. be able to. In addition, the heat-resistant film B can smooth the surface of the wallpaper to make stains less likely to occur and to easily remove stains, thereby providing good dimensional stability.

Further, since the hardened layer D is provided on the design layer C of this heat-resistant wallpaper, the protective effect of the design layer C and the scratch resistance of the surface are further improved, and the gloss, stain resistance and dimensional stability are further improved. Etc. are further improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a heat-resistant wallpaper of the present invention.

[Explanation of symbols]

1 Heat-resistant wallpaper A Ceramic impregnated base fabric B Heat-resistant film C Design layer D Hardened layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuaki Ito 1-1-1, Sonoyama, Otsu-shi, Shiga Toray Co., Ltd. Shiga Plant (72) Inventor Mizouchi 1-1-1, Sonoyama, Otsu, Shiga Prefecture No. Toray Co., Ltd. Shiga Plant

Claims (1)

Claims: 1. A ceramic impregnated base fabric A, a non-combustible / infusible heat-resistant film B, a design layer C, and a hardened layer D having a hardness of pencil hardness H or more are D / C / B / A. Or a heat-resistant wallpaper laminated in the order of D / B / C / A.