JPH05329991A - Fabric having resin coating layer - Google Patents

Abstract

PURPOSE:To enable the long-term use of a cloth like article used as a shading material such as a curtain or a roll screen by preventing the fading of a color printing pattern due to UV rays by forming a transparent resin coating layer. CONSTITUTION:When transparent coating layers 2, 3 composed of fluoroplastic are formed on a cloth like base material 1, by mixing an inorg. filler with fluoroplastic, UV shielding function is imparted while the transparency of the coating layers is held and the fading of the coating layers due to UV rays is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth having a resin coating layer suitable as a light shielding material for curtains, roll screens and the like.

[0002]

2. Description of the Related Art Woven cloths made of fibers such as polyester, polyamide, polyvinylidene chloride, acrylic, cotton and hemp are used as light-shielding materials for curtains, roll screens and the like.

From the aesthetic point of view, it is customary to color the woven fabrics such as curtains and roll screens from a light-shielding material, and to apply a printing pattern or the like. At the time of coloring or printing, a dye or ink is mixed with an organic ultraviolet absorber. Sometimes.

Further, these curtains and roll screens may be provided with a transparent coating layer made of an acrylic resin for the prevention of stain adhesion, or sprayed with a mildew proofing agent for the prevention of mold.

[0005]

However, colored or printed curtains or roll screens do not have sufficient light resistance, and are faded by ultraviolet rays in a short period of time. In order to prevent this fading, dyes and inks may be blended with an organic ultraviolet absorber as described above, but the fading prevention effect is still insufficient.

Further, the coating of acrylic resin is not preferable from the viewpoint of flame retardancy, and the antifungal agent is harmful to the human body, and its use is not preferable.

[0007]

In order to solve the above problems of the prior art, the present inventor has conducted earnest research and, as a result, formed a transparent coating layer composed of a specific resin and an inorganic filler, which made it difficult for fading to occur. The inventors have found that a resin-coated cloth excellent in flammability and mold resistance can be obtained, and completed the present invention.

That is, the present invention relates to a cloth having a resin coating layer, characterized in that a fluororesin transparent coating layer containing an inorganic filler is formed on a cloth-like substrate.

As the cloth-like substrate used in the present invention, those conventionally used for curtains, roll screens and the like can be used as they are. For example, polyester, polyamide, polyvinylidene chloride, synthetic fibers such as acrylic,
Woven cloth made of natural fibers such as cotton and hemp can be used,
A non-woven fabric can also be used.

A fluororesin transparent coating layer containing an inorganic filler is formed on the cloth-like substrate. As the fluororesin for forming the transparent coating layer, a tetrafluoroethylene-hexafluoropropylene copolymer (FE
P), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), polyvinylidene fluoride (PVdF), fluoroolefin-vinyl ether copolymer (FEVE), ethylene-tetrafluoroethylene copolymer (ETFE), polytetra Fluoroethylene (PTFE) or the like can be used.

It is important that the fluororesin coating layer contains an inorganic filler powder. Specific examples of the inorganic filler include metal oxide powders such as zinc oxide, titanium oxide, tin oxide and indium oxide, metal sulfate powders such as barium sulfate, and metal sulfide powders such as zinc sulfide.

The inorganic filler is present in the fluororesin transparent coating layer, and due to its ultraviolet shielding function, it prevents the ultraviolet rays from reaching the cloth-like substrate and causes fading of the cloth-like substrate which has been colored or printed. However, in order to maintain the transparency of the fluororesin coating layer, the particle size is set to about 0.2 μm or less. The wavelength of visible light is about 400-800 nm,
Even if an inorganic filler powder is contained in the fluororesin transparent coating layer, the transparency of the coating layer is not hindered as long as the particle diameter is 1/2 or less of the visible light wavelength.

The fluororesin transparent coating layer is formed on a cloth-like substrate by, for example, mixing a dispersion or solution of fluororesin with an inorganic filler powder and dipping the dispersion or solution in a spray, roll coater or screen. This can be carried out by a method in which the cloth-like substrate is applied by printing or the like, and then the solvent is evaporated and removed by heating to a temperature not lower than the melting point of the fluororesin and baking the fluororesin.

The mixing ratio of the fluororesin and the inorganic filler in the fluororesin transparent coating layer is to maintain the transparency of the coating layer while maintaining the ultraviolet shielding effect.
It has been found that it is preferable to use 5 to 30 parts by weight (more preferably 10 to 25 parts by weight) of the inorganic filler with respect to 00 parts by weight.

FIG. 1 shows an example of a cloth having a resin coating layer according to the present invention. A fluororesin transparent coating layer 2 containing an inorganic filler is provided on both sides of a cloth-like substrate 1 which is colored or printed. 3 are formed. The thickness of these coating layers 2 and 3 is usually about 1 to 10 μm. By setting the thickness of the coating layers 2 and 3 to this extent, the transparency thereof can be secured and the fading of the cloth-like substrate can be prevented. The thickness of the coating layer is about 1 to 20 g / m ² when converted to the amount of the fluororesin and the inorganic filler attached to the cloth-like substrate.

When the fluororesin transparent coating layer is formed on the cloth-like substrate by using the dispersion containing the fluororesin and the inorganic filler powder as described above, the fibers constituting the cloth-like substrate are treated with the fluororesin. Is impregnated. Further, if the cloth-like substrate has a textured void, this void is usually filled and blocked with a mixture of the fluororesin and the inorganic filler.

In the present invention, as shown in FIG. 2, silicone resin layers 4 and 5 are first formed on the cloth-like substrate 1, and a fluororesin transparent coating layer containing an inorganic filler is formed on the silicone resin layers 4 and 5. Two or three can be formed, and such a structure can improve flexibility. The amount of silicone resin adhered to the cloth-like substrate is usually about 10 g / m ²
The following is sufficient.

The formation of the silicone resin layer on the cloth-like substrate is also carried out by the method of applying the silicone resin-containing liquid to the cloth-like substrate and then heating to remove the solvent, similarly to the formation of the fluororesin transparent coating layer. You can Therefore, the fibers constituting the cloth-like base material are impregnated with the silicone resin. Further, if the cloth-like substrate has a texture void, the void is usually filled and blocked with the silicone resin.

[0019]

The present invention will be described in more detail with reference to the following examples.

Example 1 An aqueous dispersion having a PvDF concentration of 51% by weight and an aqueous dispersion having a zinc oxide (particle size 0.005 μm) concentration of 30% by weight were mixed, and the weight ratio of PvDF and zinc oxide was 100/15. A white mixed dispersion is obtained.

A polyester fiber cloth having a printed pattern (commercially available product, unit weight: 250 g / m ² ) was dipped in the above mixed dispersion and pulled up, and the excessively adhered dispersion was wiped off with a doctor and dried at room temperature to 30 After air-drying for 1 minute, it was heated at 200 ° C. for 2 minutes to form a transparent PvDF layer containing zinc oxide (the amount of adhesion to the cloth was 45
g / m ² ) was formed to obtain a cloth having a resin coating layer having the same structure as shown in FIG.

Example 2 A xylene solution having a FEVE concentration of 40% by weight was mixed with a liquid in which titanium oxide (particle size: 0.2 μm) was dispersed in xylene to a concentration of 40% by weight, and the weight of FEVE and titanium oxide was mixed. A clear liquid with a ratio of 100/15 is obtained.

The same polyester fiber cloth as used in Example 1 was dipped in this transparent liquid and pulled up. The excessively adhered liquid was wiped off with a doctor, air-dried at room temperature for 30 minutes, and then at 200 ° C. A transparent FEVE layer containing titanium oxide (the amount of adhesion to the cloth is 50
g / m ² ) was formed to obtain a cloth having a resin coating layer having the same structure as shown in FIG.

Example 3 An aqueous dispersion having a PTFE concentration of 40% by weight and an aqueous dispersion having a particle size of 0.005 μm and a zinc oxide powder concentration of 30% by weight were mixed, and the weight ratio of PTFE to zinc oxide was 100/15. Get a certain dispersion.

A print-patterned aromatic polyamide fiber cloth (commercially available product, unit weight: 350 g / m ² ) was dipped in the dispersion and pulled up, and the excess adhesion was wiped off with a doctor and allowed to stand at room temperature for 30 minutes. After air-drying for 1 minute, it was heated at 370 ° C. for 2 minutes to give a transparent PTFE layer containing zinc oxide (the amount of adhesion to the cloth was 150.
g / m ² ) was formed to obtain a cloth having a resin coating layer having the same structure as shown in FIG.

Example 4 The same polyester fiber cloth as used in Example 1 was dipped in an emulsion having a silicone resin concentration of 3% by weight (Dow Corning, trade name ET-4327) and pulled up.
It is heated at 90 ° C. for 150 seconds to impregnate the cloth with the silicone resin and form a silicone resin layer on the surface thereof.
The amount of silicone resin adhered to the cloth was 5 g / m ² .

Using a cloth having a silicone resin layer formed thereon, dipping in a mixing dispersion, pulling up, removal of excess adhered dispersion, air drying and heating were carried out in the same manner as in Example 1, and a PvDF layer ( Each of them has a thickness of 5 μm) to obtain a cloth having a resin coating with the same structure as shown in FIG.

Comparative Example 1 A cloth having a resin coating layer was obtained in the same manner as in Example 1 except that the aqueous dispersion containing zinc oxide was not used.

Comparative Example 2 A cloth having a resin coating layer was obtained in the same manner as in Example 2 except that the xylene solution in which titanium oxide was dispersed was not used.

Comparative Example 3 A cloth having a resin coating layer was obtained in the same manner as in Example 3 except that zinc oxide was not added.

Comparative Example 4 A cloth having a resin coating layer was obtained in the same manner as in Example 4 except that the aqueous dispersion containing zinc oxide was not used.

Comparative Example 5 A polyester fiber cloth (commercially available product, weight per unit area: 250 g / m ² ) printed with an ink containing an organic ultraviolet absorber (benzophenone) was prepared.

The cloths obtained in these Examples and Comparative Examples were tested in the following manner, and the results obtained are shown in Table 1.
Shown in.

A. Fading test The cloth was set in a sunshine weatherometer and the time until fading was measured. Occurrence of fading was visually determined. In Table 1, "no fading" means that no fading occurred even after 5000 hours.

B. Tensile strength retention rate Universal tensile tester (Tensilon UTM, manufactured by Orientec Co., Ltd.) was used for samples taken from the weatherometer.
-III) using a temperature of 25 ° C. and a pulling speed of 200 mm /
The test is performed under the condition of min. Then, it is shown as a ratio (%) when the value before being put into the weatherometer is 100.

[0036]

[0037]

EFFECTS OF THE INVENTION The present invention is constituted as described above, and when the transparent fluororesin layer is formed on the cloth-like substrate, since the inorganic filler is added to the layer, its transparency is maintained, It can be provided with an ultraviolet shielding function and can prevent fading of the fabric for a long period of time.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a cloth having a resin coating layer according to the present invention.

FIG. 2 is a front view showing an example of a cloth having a resin coating layer according to the present invention.

[Explanation of symbols]

 1 Cloth-like substrate 2 Fluorine resin transparent coating layer 3 Fluorine resin transparent coating layer 4 Silicone resin layer 5 Silicone resin layer

Claims (4)

[Claims] 1. A cloth having a resin coating layer formed by forming a fluororesin transparent coating layer containing an inorganic filler on a cloth substrate. 2. A cloth having a resin coating layer in which a silicone resin layer is formed on a cloth-like substrate, and a fluororesin transparent coating layer containing an inorganic filler is further formed on the silicone resin layer. 3. The cloth having a resin coating layer according to claim 1, wherein the inorganic filler is a metal oxide powder and / or a metal sulfate powder. 4. A cloth having a resin coating layer according to claim 1, wherein the inorganic filler has a particle size of 0.2 μm or less.