JPH0444841A - Fluororesin sheet material - Google Patents

Abstract

PURPOSE:To enable a desirable permeability and reflectivity to be provided in accordance with uses by providing a fluororesin layer on at least one surface of fabric consisting of organic fibers/inorganic fibers, and making the fluororesin layer contain a reflective filling agent. CONSTITUTION:On only one surface of a glass fiber fabric 1, a fluororesin layer 3 is provided that contains a reflective filling agent. Namely, on both surfaces of glass fiber fabric 1 consisting of wefts 1a and warps 1b, polytetrafluoroethylene suspension is applied and, on both surfaces of the glass fiber fabric 1, fluororesin layer 2a, 2b are respectively provided in order to manufacture a base material 5. Next, polytetrafluoroethylene suspension mixed with a reflective filling material is applied on the fluororesin layer 2a of the base material 5, and then dried, following this, baked. For the abovementioned filling material, it is preferable to be a reflective pigment such as metallic powders, metallic foil and the like, or an inorganic filling material or the like having reflectivity such as mica, silica and the like. The content of the filling agent to fluororesin is decided appropriately such that the reflectivity of the sheet material becomes to be a desirable value, however, it is preferable to be in the range of 0.1-0.3wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a fluororesin sheet/material made by providing a fluororesin layer on a woven fabric.

(Summary of the Invention) The present invention provides a fluororesin layer on at least the force side of a woven fabric, and this fluororesin layer contains a filler and has light reflectivity, thereby achieving a desired light reflectance. It is a fluororesin sheet material having a light transmittance and a light transmittance.

[Conventional technology]

Fluororesin sheet materials, which are made by forming a fluororesin layer made of polytetrafluoroethylene or the like on a woven fabric made of glass fiber or the like, have excellent chemical stability and weather resistance, and have very little deterioration over time. It is used for architectural roofing materials (e.g. indoor baseball field roofing materials, tent materials), release sheets, conveyor belt materials, etc.

Glass woven fabric (fluoropolymer sheet) is used as a construction sheet material to allow sufficient natural light to enter the interior of a building. Glass woven fabric is coated with a mixture of tetrafluoroethylene and glass beads to increase its translucency. material) is known. (For example, JP-A-49-113J96,
(Japanese Patent Publication No. 5222375) In addition, the release sheet material is a light brown fluororesin sheet material, and the belt material is a black fluororesin sheet material filled with graphite or the like to improve abrasion resistance. Each is actually used.

[Problem to be solved by the invention]

However, when using fluoropolymer sheet materials with enhanced translucency as described above as roofing materials, the temperature inside the building may rise too much in some cases, making it difficult to control the indoor temperature. There were problems such as temperature control equipment being too expensive.

In addition, conventional fluororesin sheet materials had the same color on both sides, and were monotonous with no changes in color or tone or patterns, despite their excellent physical, chemical, and electrical properties. Its use was limited.

In particular, building materials with various patterns and varying colors and tones are in demand due to demands for the appearance and design of buildings, and fluororesin sheet materials are no exception.

An object of the present invention is to provide a fluororesin sheet material that has desired transmittance and reflectance depending on its intended use, as well as desired pattern, color, and tone.

[Means for Solving the Problems] In order to achieve the above object, the fluororesin sheet material of the present invention is provided with a fluororesin layer on at least one surface of a woven fabric made of organic fibers and/or inorganic fibers. This fluororesin layer is characterized in that it has light reflectivity by containing a reflective filler.

The filler may be any material as long as it has a reflective property, and a reflective pigment such as metal powder or metal foil, or a reflective inorganic filler such as mica or silica is preferable.

The fluororesin layer may further contain a coloring pigment, whereby a desired color and/or tone can be obtained.

Further, a first fluororesin layer containing the filler as a first filler is provided on one surface of the woven fabric, and a second fluororesin layer containing the second filler is provided on one surface or the other surface of the woven fabric. A fluororesin layer can be further provided.

The first and second fillers can have different types and/or contents. If the second fluororesin layer contains at least a coloring pigment, the desired color and/or color can be achieved.
Or you can get a different color tone. Note that the second fluororesin layer may be provided on the first fluororesin layer, or vice versa.

A third filler containing a third filler made of, for example, a reflective pigment and/or a colored pigment, on one side and/or the other side of the sheet material provided with the first and second fluororesin layers. A fluororesin layer of No. 3 may be further provided.

As described above, for example, when a colored fluororesin layer is provided on a reflective fluororesin layer, the color tone of the colored fluororesin layer is emphasized.

Further, when the second filler is composed of glass beads or glass beads, for example, the second fluororesin layer can have a translucent property, and the second fluororesin layer and the second fluororesin layer have a reflective property. By combining the first and/or third fluororesin layers, it is possible to construct a sheet material having a predetermined anti-light resistance without significantly reducing the light transmittance.

Furthermore, the content of the first, second and third fillers and/or
Alternatively, by varying the type and/or the thickness of each of the fluororesin layers and combining them in various ways, it is possible to make the sheet material have different colors and/or tones on one side and the other side. It can be configured such that the material has a light reflectance of 5 to 95% and a light transmittance of 0 to 25%.

Furthermore, the first, second, or third fluororesin layer may be partially provided to form a predetermined pattern on at least one surface of the sheet material.

Note that the above-mentioned woven fabric may be made of either organic fibers or inorganic fibers, or a mixture of both.
A woven fabric made of glass fiber is preferred from the viewpoint of strength and translucency.

In addition, examples of the fluororesin include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, polyvinyl fluoride, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and tetrafluoroethylene-hexafluoropropylene copolymer. , tetrafluoroethylene-ethylene copolymer, tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer, and chlorotrifluoroethylene-ethylene copolymer, either alone or in combination of two or more. I can do it.

In addition, the reflective pigments that make up the reflective filler include aluminum powder, nickel powder, platinum powder, gold powder, silver powder, copper powder, and stainless steel flakes (which are closer to powder than foil). There are known metal pigments made of metal powders such as aluminum foil, nickel foil, platinum foil, stainless steel foil, gold foil, silver foil, copper foil, and alloy foil such as brass foil.

The above-mentioned gold rjA pigments and metal foil pigments can be used alone or in combination of two or more types.Furthermore, according to the above-mentioned metal pigments and metal foil pigments, for example, gold,
When using copper, brass, etc., the golden sheet material becomes aluminum, -,
Using the ram, each silver sheet material can be constructed and configured to have a desired reflectance.

Further, in addition to the reflective filler ξ, a known reflective inorganic filler may be used. For example, mica, silica, calcium carbonate, bi-D calcium phosphate, aluminum oxide, alumina, calcium hydroxide, calcium phosphate, aluminum hydroxide, potassium titanate 1, silicon nitride whiskers, alumina whiskers, silicon carbide whiskers, potassium titanate. , whiskers, and glass fibers.

The inclusion of the various whiskers or glass fibers described above also contributes to the strength of the sheet material, and is therefore advantageous when the strength of the sheet material is particularly required.

Further, as the reflective filler 2, glass beads or glass beads plated with a metal such as nila gel plating may be used.

The content of the above reflective filler in fluororesin is:
The amount may be adjusted as appropriate so that the reflectance of the sheet material becomes a desired value, but it is preferably in the range of 0.1 to 30% by weight.

Furthermore, in addition to the above-mentioned colored pigments, known inorganic pigments, organic pigments, or dyes can be used.

Inorganic pigments include oxides, sulfides, and sulfates of various metals, such as ferrous oxide, iron, titanium oxide, zinc oxide, nilagel oxide, antimony oxide, chromium oxide,
Mention may be made of silicon oxide, cobalt oxide, cadmium sulfide, selenium sulfide, barium sulfate, lead chromate, cobalt phosphate, cobalt borate, lead 1 carbonate, zirconium oxide, chromate, and carbon fluff.

”-The organic pigments include phthalonanine organic pigments,
Examples include quinacridone organic pigments, benzidine organic pigments, and lake pigments.

Examples of the dyes include ab dyes, anthraquinone dyes, thioindigo dyes, quinoline dyes, and indanthrene dyes.

Further, as the coloring pigment 7, known inorganic fillers and organic fillers may be used. The inorganic fillers listed in 1 to 1 are as follows:
=Molybdenum sulfide, calcium silicate, bronze, talc, clay, sericite, graphite, graphite fluoride, etc. In addition, examples of the organic filler include aromatic polyamide, aromatic polyimide, aromatic polyamideimide, polyphenylene sulfide, polyetheretherketone, polyetherketone, polyetherketone, aromatic polyester, thermotropic liquid crystal polymer, Examples include lyotropic liquid crystal polymers.

The various colored pigments described above can be appropriately selected depending on the desired color and/or tone.

Note that each of the above-mentioned fluororesin layers can be formed by laminating a plurality of thin layers, and can be made to have a predetermined thickness.

Further, by appropriately selecting this thickness, the light reflectance and light transmittance of the sheet material can be changed. for example,
According to a sheet material in which a reflective fluororesin layer is formed thinner, a predetermined reflectance can be obtained without drastically reducing the light transmittance.

In addition, the sheet/material described in 7) can be provided with an arbitrary number of fluororesin layers containing fillers as described above as necessary.
However, in cases where corrosion of the contained filler poses a problem, the outermost layer of the sheet material is preferably a fluororesin layer containing no filler.

Alternatively, if the outermost layer contains a filler, it is preferable to select a filler that can withstand such corrosion.

In addition, a fluororesin layer containing no filler is formed on both sides of the woven fabric by a coating method, dipping method, etc.
An aqueous suspension or enamel containing the above-mentioned filler and/or coloring pigment is applied to this by a roll coater method or a spraying method, and after drying, the above-mentioned fluororesin is baked at 350°C or higher. Can manufacture sheet materials.

In this case, since the metal powder, metal foil, etc. tend to precipitate in the aqueous suspension and tend to be unevenly dispersed, a thickener is added to the suspension to adjust the viscosity of the suspension. It is preferable to adjust the amount to about 20 cp to 4000 cp.

In addition, in this specification, color refers to perceived color, and hue is an attribute of color perception when saturation (saturation) and lightness are considered simultaneously ("Encyclopedia of Optical Terms", p. 100~ 1
01, published November 30, 1981, Ohmsha).

[Effect]

The fluororesin layer containing a reflective filler provided on at least one surface of the woven fabric has reflective properties, and the content of the filler can be arbitrarily changed. Therefore, desired light reflectance and light transmittance can be obtained in the fluororesin sheet material.

[Example] Examples 1 to 13 according to the present invention will be described below with reference to FIGS. 1 to 5B.

Implementation (2) As shown in FIG. 1, the fluororesin sheet material of Example 1 is one in which a fluororesin layer 3 containing a reflective filler is provided on only one side of a glass woven fabric 1. This fluororesin sheet material was obtained as follows.

That is, a glass woven fabric 1 consisting of a weft 1a and a warp 1b
(Product name: Nittobo glass fiber, manufactured by Nittobo ■) A polytetrafluoroethylene suspension with no filler added (Product name: Fluon AD-1, manufactured by Asahi Glass ■)
was applied. In this way, a base material 5 was created by providing fluororesin layers 2a and 2b containing no filler on both sides of the glass woven fabric 1, respectively.

Next, a polytetrafluoroethylene suspension mixed with 10 F of mica (trade name: Mica Powder, manufactured by Dainichiseika Chemical Industry Co., Ltd.) as a reflective filler was added to the fluororesin layer 2a of the base material 5. applied on top.

This fluororesin sheet material was dried and then fired at a temperature of 400°C.

As a result, a fluororesin sheet material provided with a reflective fluororesin layer 3 was obtained. The fluororesin layer 3 was formed by multiple coatings and laminated in multiple layers, and had a total thickness of about 20 μm.

Actual IL2-Example 2 is a fluororesin sheet material obtained in the same manner as Example 1 except that 25% by weight of the filler was filled with stainless steel foil.

Actual JLf Discharge 1 Example 3 is a fluororesin sheet material obtained in the same manner as Example 1 except that 20% by weight of nickel powder was used as the filler.

The results of measuring the light reflectance and light transmittance of the fluororesin sheet materials of Examples 1 to 3 described above are shown in Table 1 below. Note that in this measurement, light was incident on the sheet material from above in FIG. The color of the sheet material is also shown.

(Left below) In Examples 1 to 3 above, the filling amount of each filler can be changed within the range shown in Table 2 below, thereby achieving light reflectance and light transmittance within the range shown in the table. can be obtained freely.

(The following is a blank space) Actual] 11 (As shown in Fig. 2, the fluororesin sheet material of Example 4 has a glass woven fabric 1 with a first layer containing a predetermined filler on one side.
and a second fluororesin layer 11.12. This fluororesin sheet material was produced in the same manner as in Example 1, using the same base material 5 as in Example 1, except as described below.

That is, a polytetrafluoroethylene suspension mixed with 5% by weight of graphite as a first filler was applied onto the fluororesin layer 2a. In this way, the first fluororesin layer 11 colored black was formed.

Next, a polytetrafluoroethylene suspension mixed with 25% by weight of mica as a second filler was applied onto the first fluororesin layer 11. In this way, the second fluororesin layer 12 with reflective properties was formed.

Real JLL! L Example 5 is a fluororesin sheet material obtained in the same manner as in Example 4, except that the first filler was 25% by weight of mica and the second filler was 1% by weight of graphite. .

Example 6 was the same as above except that the first filler was 2% by weight of cadmium sulfide (for yellow coloring) and the second filler was 5% by weight of stainless steel foil (for light reflection). This is a fluororesin sheet material obtained in the same manner as in Example 4.

Actual f Example 7 is a fluororesin sheet obtained in the same manner as in Example 4 except that the first filler was 10% by weight of stainless steel foil and the second filler was 2% by weight of cadmium sulfide. It is a material.

Example 8 has a structure similar to that shown in FIG.
A polytetrafluoroethylene suspension containing 10% by weight of alumina as a first filler and 1% by weight of carbon black as a second filler is applied onto the fluororesin layer 2a. In this way, a fluororesin sheet material having reflective properties and a black-colored fluororesin layer 3 was obtained.

The light reflectance and light transmittance of the fluororesin sheet materials of Examples 4 to 8 described above were measured in the same manner as Examples 1 to 3. The results are shown in Table 3 below. In addition, ( ) in the same table
shows the preferable range of each filler and the respective ranges of light reflectance and light transmittance obtained thereby.

Note that the thickness of the first and second fluororesin layers 11 is about 1 to 100 μm.

(Margin below) Comparing Example 4 and Example 5 above, the first fluororesin layer 11 of Example 4 is colored black, and the second fluororesin layer 12 is reflective, When the surface of this sheet material is viewed from above in FIG. 2, the entire surface appears silver-black because the surface is reflective. On the other hand, since the first fluororesin layer 11 of Example 5 has reflective properties and the second fluororesin layer 12 is colored black, its surface appears black and the light reflectance is It is lower than the sheet material of Example 4.

Further, the first fluororesin layer 11 of Example 6 is colored yellow, and the second fluororesin layer 12 has reflective properties.

On the other hand, the first and second fluororesin layers 11 and 12 of Example 7 are opposite to those of Example 6, and there is a reflective layer 11 under the yellow colored layer 12. Therefore, the yellow color is emphasized due to light reflection in the layer 11, and the color tone is different from that of Example 6. Furthermore, the light reflectance in Example 7 is lower than that in Example 6.

Further, in Example 8, a first filler for obtaining reflectivity and a second filler for coloring were simultaneously contained in the same fluororesin layer.

The light reflectance obtained by this is the same as that of the first filler and the second filler.
When the content with the filler is constant, the light reflectance of the sheet material in which the first fluororesin layer 11 has reflective properties and the second fluororesin layer 12 is blue is the opposite structure to that in this case. This value is approximately intermediate between the light reflectance of the sheet material and the light reflectance of the sheet material.

As described above, by providing a reflective fluororesin layer on or under a colored fluororesin, the light reflectance of the sheet material can be changed and the color tone can be changed. can also be changed.

As shown in FIG. 3, the fluororesin sheet material of Example 9 had a third filler on the fluororesin layer 2b side of the base material 5 of the sheet material having the structure shown in FIG. This is a structure in which a third fluororesin layer 13 containing the fluororesin is provided.

This sheet material contains 10% by weight of mica as the first filler.
The first fluororesin layer 11 is a layer for reflection containing 1% by weight of cadmium sulfide as a second filler, and the second fluororesin layer 12 is a layer for coloring containing 1% by weight of cadmium sulfide as a second filler.
and is provided.

Then, as a third filler, a polytetrafluoroethylene suspension mixed with 2% by weight of cobalt blue for coloring blue was applied to the fluororesin layer 2b. In this way, the third fluororesin layer 13 was formed.

According to Example 9, when the surface is viewed from above in FIG. 3, it appears yellow, and when viewed from below in FIG. 3, it appears blue, and has a predetermined reflectance due to the first fluororesin layer 11. be able to.

Note that the first filler and the second filler may be mixed to form a fluororesin layer containing both fillers instead of the first and second fluororesin layers.

Actual JLLu Example 10 was obtained in the same manner as Example 9 above, except that a third fluororesin layer 13 containing 2% by weight of cobalt blue and 3% by weight of stainless steel foil was provided as the third filler. This is a fluororesin sheet material.

This fluororesin layer 13 is not only colored blue but also has reflective properties.

When the sheet material of Example 10 is used, for example, as a roofing material for a building, it has a predetermined reflectance for external light and a predetermined reflectance for lighting means provided inside the building. This makes it possible to illuminate the inside of the building even more brightly, and also provides a heat-retaining effect. This makes it possible to reduce the energy used for lighting and air temperature regulation.

Note that the third fluororesin layer in this case may be formed separately into a reflective layer and a colored layer without mixing the two fillers.

11 Upper Exit” Example 11 has a structure similar to that shown in FIG.
Glass beads and 15% by weight of glass bubbles were mixed into a polytetrafluoroethylene suspension, and this was applied to both sides of a glass woven fabric to form fluororesin layers 2a and 2b. A fluororesin sheet material was obtained by forming a fluororesin layer 3 containing 5% by weight of brass powder as a reflective filler on the fluororesin layer 2a.

When the light reflectance and light transmittance of this sheet material were measured in the same manner as described above, the light reflectance was 40% and the light transmittance was 15%. At this time, the light enters the sheet material from below in FIG.

In addition, the content of glass bubbles or glass beads is 1~
Varying in the range of 15% by weight and reflective filler from 1 to 30
If the weight percentage is changed, the light reflectance will be between 5 and 95% and 0.
Sheet materials with a transmittance of ~20% can be obtained.

According to the sheet material of Example 11, the fluororesin layer 2a
, 2b contains glass beads and glass bubbles as a filler for increasing translucency, so that a predetermined light reflectance can be obtained in the sheet material without significantly reducing the light transmittance.

[As shown in FIG. 4, the fluororesin sheet material of Example 12 contained a second filler on the fluororesin layer 2b side of the base material 5 of the sheet material having the structure shown in FIG. A second fluororesin layer 12 is provided.

The first fluororesin 11 containing 10% by weight of glass beads and glass bubbles as in Example 11 above as a first filler, and 5 weights of brass powder as in Example 11 as a second filler. The second fluororesin layer 12 containing %
and is provided.

According to this twelfth embodiment, when light enters the sheet material from below in FIG. 4, a predetermined reflectance can be obtained in the sheet material without significantly reducing the light transmittance, as in the eleventh embodiment.

Note that it is also possible to configure one of the first and second fluororesin layers 11, 12 to have reflective properties and the other to be colored.

As shown in FIGS. 5A and 5B, the fluororesin sheet material of Example 13 has the same structure as that in FIG. 4, but the fluororesin layer 2a of the base material 5 shown in FIG. The first fluororesin layer 11 is partially formed so that a pattern 15 consisting of the letter "Y" is formed thereon.

First fluororesin layer 1 containing 10% by weight of red iron oxide (ferric oxide) for coloring red as a first filler
1 was formed into the letter "Y" using an appropriate pattern. Further, a second fluororesin layer 12 containing 1% by weight of nickel powder, which is a reflective filler, was formed as a second filler.

According to Example 13, patterns such as predetermined letters and pictures can be freely formed on the surface of the sheet material in a desired color, and the second fluororesin layer has reflective properties.
The pattern can be made even more conspicuous.

Depending on the type of filler contained in the 1fLLL soil fluororesin layer, the sheet material may be affected by acids, alkalis, organic solvents, etc., for example. When a fluororesin layer filled with metal foil or the like is exposed to a corrosive environment as described above, the fluororesin layer is likely to change due to corrosion of the filler or elution of the filler. In order to prevent this, it is effective to coat a fluororesin layer containing no filler or a fluororesin layer containing a filler having chemical and solvent resistance on the fluororesin layer containing a filler.

This Example 14 is a sheet material having the same structure as the fluororesin sheet material shown in FIG.
Forming a first fluororesin layer ll containing 5% by weight,
Next, a second fluororesin layer 12 containing no filler was formed in the same manner as in Example 4.

Further, for comparison, a fluororesin sheet material similar to that of Example 14 was created except that the second fluororesin layer 12 was not formed.

The sheet material of Example 14 and the sheet material for comparison were immersed in a 20% hydrochloric acid solution at 40° C. for 48 hours, and then the surfaces of these sheet materials were observed. As a result, no change was observed in the sheet material of this example whose outermost layer was the fluororesin layer 12 that did not contain filler, but the sheet material for comparison which did not have the fluororesin layer 12 formed thereon. The surface was completely discolored.

Example 15 is a sheet material having the same structure as the fluororesin sheet material shown in FIG.
A sheet material similar to that in Example 1 was prepared except that the thickness of the fluororesin layer 3 containing the following was approximately 40 μm.

The light reflectance and light transmittance of the sheet material of Example 15 were measured. The results are shown in Table 4 below.

Note that the results of Example 1 are also shown in the graph for comparison.

Table 4 It can be seen from Table 4 that the light reflectance and light transmittance of the sheet material can be changed by changing the thickness of the fluororesin layer 3 containing the filler.

As explained above, according to the embodiment, the desired light reflectance (
A fluororesin sheet material having a light transmittance of 0 to 25%) and a light transmittance of 0 to 25% can be obtained. In addition to the reflective fluororesin layer, by providing a fluororesin colored by containing a coloring pigment of a desired color, a sheet material of a desired color can be obtained. Further, a fluororesin layer containing a mixture of a reflective filler and a coloring filler may be provided. In addition, by providing glass beads that increase translucency or a fluororesin layer containing glass beads, it is possible to obtain a sheet material having a predetermined light reflectance without significantly lowering the light transmittance. It is also possible to form a desired pattern on the surface of the sheet material, or to make both sides different in color and/or tone. Further, when the sheet material is used in a corrosive environment, the outermost layer (layer exposed to the corrosive environment) is preferably a fluororesin layer containing no filler.

Therefore, the fluororesin sheet material described above can be used in a much wider range than conventional ones. An example of its application will be explained below.

The fluororesin sheet material of Example 1, the fluororesin sheet material of the comparative example, and the conventional fluororesin sheet material containing no filler were used as roofing materials for an architectural model with an internal volume of 1. were applied to each. Then, changes in outside air temperature and each indoor temperature were measured.

The results are shown in Table 5.

The sheet material of the comparative example has the same structure as in FIG. 1, but the fluororesin layer 3 contains 5% by weight of graphite and is colored black. Further, the thicknesses of the above three types of sheet materials are almost the same, and their light reflectance and light transmittance are shown in Table 5.

Further, the sheet materials of Example 1 and Comparative Example were attached so that the fluororesin layer 3 containing the filler was on the outside (the side where natural light enters).

(Left blank space below) Table As can be seen from Table 5 above, the indoor temperature is lowest in the example with the highest light reflectance, and highest in the comparative example with the lowest light reflectance. In the conventional example, which had a light reflectance lower than that of the sheet material of Example 1 and higher than that of the comparative example, the indoor temperature was between the values of the example and the comparative example.

As can be seen from the above results, by using the sheet material having a high light reflectance of this example, the temperature inside the building can be made lower than the outside temperature.

Therefore, it is possible to achieve reductions in equipment costs and energy consumption for air temperature adjustment in buildings.

Further, for example, the sheet material of Example 1 may be used as the fluororesin layer 3
When used inside a building, it can enhance the heat retention effect and the internal lighting effect.

The fluororesin sheet material according to the present invention can obtain desired light reflectance and light transmittance, as well as select desired colors/tones and freely form patterns, so when used for example in architecture, The degree of freedom in architectural design and design can be increased.

Furthermore, the fluororesin sheet material according to the present invention may be used not only for construction purposes, but also for belt conveyor belt materials, release films, release sheets, inner wall materials in corrosive environments, partition materials, etc. It also shows good characteristics.

Furthermore, by laminating these sheet materials and molding them under heat and pressure, it is also possible to use them as an integrated laminate.

Although Examples 1 to 15 and application examples have been described above, the present invention is not limited to the above-mentioned examples and application examples, and the technical idea of the present invention can be modified according to various uses of the sheet material. It will be understood that the fluororesin layer can be configured in various ways based on the above, and the fluororesin sheet material according to the present invention can be used in various fields.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

A fluororesin layer containing a reflective filler is provided, and the content and type of this filler and the thickness of the fluororesin layer can be changed arbitrarily, so that the desired light reflectance and light transmittance can be achieved. It is possible to provide a fluororesin sheet material with excellent chemical stability and weather resistance.

a fluororesin layer containing a reflective filler and a colored pigment;
Alternatively, since another fluororesin layer containing a colored pigment can be provided, the desired light reflectance, light transmittance and color/color can be obtained.
A fluororesin sheet material having a different color tone can be provided.

Since reflective and/or colored fluororesin layers can be provided on both sides of the woven fabric, the fluororesin sheet material has different light reflectance, light transmittance, and/or color/tone on both sides of the sheet material. can be provided.

Although the fluororesin layer can be partially provided on at least one surface of the sheet material, it is possible to provide a fluororesin sheet material that forms a desired pattern and has predetermined light reflectance and light transmittance.

Since another fluororesin layer containing a filler for increasing translucency can be provided, it is possible to provide a fluororesin sheet material having a predetermined light reflectance without significantly lowering the light transmittance.

[Brief explanation of drawings]

1 to 5B show examples according to the present invention, in which FIG. 1 is a cross-sectional view of the fluororesin sheet material of Example 1.2.3.8.11.15, and FIG. 2 Example 4.5.
6.7.14 A cross-sectional view of the fluororesin sheet material, FIG. 3 is a cross-sectional view of the fluororesin sheet material of Example 9.10, and FIG. 4 is a cross-section of the fluororesin sheet material of Example 12. Figure 58 is a cross-sectional view of the fluororesin sheet material of Example 13,
FIG. 5B is a plan view of the sheet material shown in FIG. 5A. In addition, in the symbols used in the drawings, 1-------
--=----Glass woven fabric 3.11.12.13-
- Fluororesin layer 15--------
−−−−=−−−−− It is a pattern.

Claims (1)

[Claims] 1. A fluororesin layer is provided on at least one surface of a woven fabric made of organic fibers and/or inorganic fibers, and this fluororesin layer contains a reflective filler to make it light reflective. A fluororesin sheet material comprising: 2. The sheet material according to claim 1, wherein the filler is composed of a reflective pigment. 3. The sheet material according to claim 2, wherein the reflective pigment is composed of metal powder and/or metal foil. 4. The sheet material according to claim 1, wherein the filler is comprised of an inorganic filler having reflective properties. 5. The sheet material according to any one of claims 1 to 4, wherein the fluororesin layer further contains a colored pigment. 6. A first fluororesin layer containing the filler as a first filler is provided on one side of the woven fabric, and a second fluororesin layer containing the second filler is provided. The sheet material according to any one of claims 1 to 5, wherein the sheet material is provided on the one surface or the other surface of the woven fabric. 7. The sheet material according to claim 6, wherein the second filler comprises a reflective filler and/or a colored pigment. 8. The first in the first and second fluororesin layers
The sheet material according to claim 6 or 7, wherein the type and/or content of the second filler and the second filler are different. 9. The sheet material according to any one of claims 6 to 8, wherein a third fluororesin layer containing a third filler is provided on one side and/or the other side of the woven fabric. 10. The sheet material according to claim 9, wherein the third filler comprises a reflective pigment and/or a colored pigment. 11. Claims 6 and 8, wherein the second or third fluororesin layer has translucency due to the second or third filler.
, 9 or 10. 12. The second or third filler may include glass beads and/or
or glass bubbles. The sheet material according to claim 11. 13. The color and/or tone is different between the one surface and the other surface due to the difference in the type and/or content of the filler contained in at least two of the first to third fluororesin layers. The sheet material according to any one of claims 6 to 12. 14. The first, second or third fluororesin layer is partially provided to form a predetermined pattern on at least one surface of the sheet material according to any one of claims 1 to 13. A sheet material featuring: 15. The type and/or content of each filler in the first, second, or third fluororesin so that the light reflectance of the sheet material according to any one of claims 1 to 14 is 5 to 95%. and/or a sheet material configured by selecting the thickness of each of the fluororesin layers. 16. The type and/or content of the first, second or third filler and/or each of the above so that the light transmittance of the sheet material according to any one of claims 1 to 15 is 0 to 25%. A sheet material composed of a fluororesin layer with a selected thickness. 17. The sheet material according to any one of claims 1 to 16, wherein the outermost layer on at least one side of the sheet material is a fluororesin layer containing no filler.