JPH02178039A - Membrane structural material - Google Patents

Abstract

PURPOSE:To obtain a membrane structural material capable of being applied to an arcade necessitating fashionability and artistic properties and to the site of festivities, etc., by coloring at least one piece of glass yarn to a specified color and working this twisted yarn into woven fabric and using the obtained glass cloth as a base material. CONSTITUTION:The silicone resin layers 2 are formed into a thin film-shape on the double sides of glass cloth 1. In the case of providing the silicone resin layer on the surface of glass cloth, cloth is impregnated with silicone resin. It is preferable for enhancement of strength and resistance to water that the small gaps existing in the woven patterns of twisted yarn forming glass cloth are closed by resin. Further as PTFE forming a first PTFE layer 3 formed on the silicone resin layer 2, PTFE having 3X10<6>-4X10<6>mol.wt. is preferably utilized from the viewpoint of film strength and adhesive force to silicone resin. Furthermore a glass bead-contg. PTFE layer 4 and a second PTFE layer 5 are formed on the first PTFE layer 3. Thereby deterioration of light transmittance resulting from coloring can be restricted to the lower limit.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a membrane structure material based on glass cloth (Glass #II fiber cloth).

(Prior Art) In recent years, examples of applying an air membrane structure or a tensile membrane structure to the roofs of buildings such as baseball stadiums, gymnasiums, etc. are increasing.

These air film structures and Te/Shin structures are shown below (a) to (C
) has the following characteristics.

(a) The roof weight is small and the dog spa/W structure has a 5R capacity.

(b) Since it contains translucent properties, there is no need for artificial illumination during the day, and the transmitted light is soft without shadows, creating a completely new indoor space that feels like being outdoors.

(C) It is possible to shorten the construction period required for roof construction work.

The materials for such a roof structure include a silicone resin layer, a polytetrafluoroethylene (hereinafter referred to as PTFE) layer, and a P containing glass beads on the surface of the glass cloth.
It is known that a TFE layer and a protective layer made of a tetrafluoroethylene-hexafluoropropylene copolymer (hereinafter referred to as FEP) are sequentially formed (Japanese Patent Publication No. 7148/1983).

By the way, in recent years, with the tightening of regulations under the Fire Service Act and the Building Standards Act, flame-retardant membrane materials for arcades, event halls, etc. have become required, and polyvinyl chloride, which has traditionally been used for these, has Alternatives to film-forming materials are being sought.

Of course, the glass cloth described in the above publication, in which a silicone resin layer, a PTFE layer, a glass bead-containing PTFE layer, and a fluororesin protective layer are successively formed on the surface, can of course be used as a roof membrane material for arcades, event halls, etc. can also be considered. However, this membrane material is only available in white, and it is rarely used in arcades and event halls that require a sense of style and artistry.

(Problems to be Solved by the Invention) Therefore, the present invention provides a colored membrane structure material that can be applied to arcades, event halls, etc. that require phthalonability and artistic quality.

(Means for Solving Problem 11) The present inventor aims to color the membrane structure material made of glass cloth and fluororesin while maintaining its basic properties (light weight, high strength, etc.), and to guarantee this coloring for a long time. , various studies were conducted. In the twisted yarn formed by twisting a plurality of glass yarns, at least one of the glass yarns is colored in a predetermined color (a color other than white), and the glass cloth obtained by processing the twisted yarn into a woven fabric. The inventors have discovered that the above object can be achieved by using this as a base material, and have completed the present invention.

That is, the membrane structure material according to the present invention includes a silicone resin layer and a first PTFE layer on the surface of a glass cloth obtained by weaving twisted threads made of a plurality of glass yarns including at least one colored glass yarn 7.

A PTFE layer containing glass beads and a second PTFE layer are sequentially provided.

Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 2, 1 is a glass cloth obtained by weaving warp yarns 7 and weft yarns 8 which are twisted yarns.O The twisted yarns 9 used to obtain this glass cloth 1 are made of a plurality of yarns as shown in FIG. It is made of glass yarn 10 of.

In the present invention, at least one of the plurality of glass yarns is colored in a predetermined color.

The manner of coloring includes (a) coloring all the yarns constituting the warp and weft; (b) coloring all the yarns constituting the warp (or weft), but not coloring the weft (or warp); (C) Warp (or weft) t - There are various ways to color glass yarn, such as coloring a predetermined percentage of the constituent yarns and not coloring the rest. For example, immersing the glass yarn in a colorant solution. A method of applying a colorant liquid or a method of applying a colorant liquid are adopted.

When producing the membrane structure material of the present invention, heating at a temperature equal to or higher than the melting point of PTFE is unavoidable, so a colorant having heat resistance that does not cause deterioration even at such high temperatures is used. Specific examples of such heat-resistant colorants include:
Examples include cadmium pigments for red color, chromium or cadmium pigments for orange color, titanium oxide or cadmium pigment for yellow color, cardin pigment for green, blue or brown color, and carbon for black color.

In the present invention, a silicone resin layer 2 is first formed in a thin layer on both sides of the glass cloth 1 as described above, as shown in FIG.

When providing a silicone resin layer on the surface of glass cloth, impregnating the cloth with silicone resin and closing small voids in the weave of the twisted threads forming the glass cloth with the resin improves strength and water resistance. This is preferable for the purpose of improvement.

Commercially available glass cloth usually has a sizing agent attached to it, and it has been found that this sizing agent can be a factor that inhibits impregnation with silicone resin.

Therefore, in the present invention, it is preferable to expose the glass cloth to a high temperature of about 350° C. or higher to remove the sizing agent by incineration prior to impregnation with the silicone resin.

Silicone resins such as Emulgin F Disverge are commercially available from Shin-Etsu Chemical Co., Ltd., Toray Silicone Co., Ltd., Dow Corning Co., Ltd., etc., and these may also be used.

When a glass cloth is impregnated with silicone resin and a thin layer is formed, if the amount of silicone resin adhered increases, the flexibility of the resulting membrane structure material increases, but the adhesion between the layer and the silicone resin decreases. It has been found that delamination may occur due to the effect of mechanical stress. on the other hand,
It has also been found that when the amount of silicone resin deposited decreases, the resulting membrane structure material becomes hard, which may cause folds or cracks in the fabric.

Therefore, in the present invention, the adhesion of the silicone resin to the glass cloth is usually about 101//Wl or less, preferably about 4 to 69/d.

In addition, the first +/)P formed on the silicone resin layer 2
To form the TFE layer 3t, a conventionally used powder with a molecular weight of 2X10' or less can be used, but from the viewpoint of coating film strength and tight layer strength with the silicone resin, a powder with a molecular weight of 3X10 is used. It is more preferable to use one of '~4X10'. Note that the amount of the PTFE layer 3 deposited is not particularly limited, but is usually 100 to 50%.
oop/m.

In the present invention, a glass bead-containing PTFE layer 4 and a second PTFE layer 5 are further formed on the first PTFE layer 3.

The main purpose of the glass bead-containing P T' F E layer 4 is to improve light transmittance through light scattering of the glass beads, and also to improve light transmittance due to the light scattering of the glass beads.
It is also possible to improve the wear resistance against rain, sand, etc. This layer 4
The amount of adhesion is usually about 100 to 5001/77/. Glass beads may be either hollow or solid, and their spherical diameter is usually about 1 to 50 μm.

The blending ratio of PTFE and glass beads in this glass bead-containing PTFE layer 4 is 1 to 5 parts by weight of glass beads per 00 parts by weight of PTFEI, considering the strength of the coating film and the adhesion with the PTFE layers 3 and 5. It turned out to be preferable.

Since the glass bead-containing PTFE layer 4 has a relatively rough surface due to the inclusion of glass beads, in the present invention, a thin second PTFE layer 5 is provided on the layer 4.
to make the surface smooth.

The amount of this PTFE layer 5 deposited is usually 50 to 100'l/r.
d, and the amount may be smaller than that of the first PTF'E layer 3. Then, on the glass bead-containing PTFE layer 4, a thin PT
By coating with the FE layer 5, it is possible to prevent the generation of cracks in the core layer 4 and also to prevent its contamination.

The glass bead-containing PTFE layer 4 and PTFE layer 5
The PTFE used for forming may be a low molecular weight powder with a molecular weight of 2 x 10' or less as in the case of the first PTFE layer 3, but from the viewpoint of coating strength and adhesion with adjacent layers, the molecular weight of PTFE is 3 x 10'. Preferably, a high molecular weight powder of ~4X10' is used.

The membrane structure material of the present invention is thus formed by forming a silicone resin layer 2, a first PTFE layer 3, a glass bead-containing PTFE layer 4, and a second PTFE layer 5 on the surface of the glass cloth.
It has a structure in which FEP is sequentially formed.
The second PTFE layer 5 is made of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, etc.
Form on top and keep #! It can also be llll116.

Like the second PTFE layer 5, this protective layer 6 is also a thin layer with an adhesion amount of about 5 to 20 f/g.

Since the present invention uses a glass cloth woven from twisted threads made of colored glass yarn and has multiple functional layers formed on its surface, there is a concern that the color of the glass yarn may be hidden by these multiple layers. However, if each layer has the above coating weight, this concealment will not occur and the coloring of the glass yarn will be bright. Crab is visible.

In addition, in the present invention, the glass cloth is colored, or the layer formed on the glass cloth is colored, or the yarn is colored, so that light can pass through the small gaps in the gold-woven texture between the twisted threads. , the decrease in light transmittance due to coloring can be minimized.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples. TFD-0680), pulled up, and heated at 360℃ for 9
Heat for 0 seconds to color the yarn.

A B1504/2 twisted yarn was made using 8 of these blue colored yarns, and this was used as the warp and weft, with a length of 25 yarns/2.
Woven fabric processed to 5 fl, 19 horizontal lines/25 fl, thickness approximately 0
．． Obtain 5ff glass cloth.

This glass cloth was mixed into an emulsion with a silicone resin concentration of 3.9% by weight (manufactured by Dow Co., Ltd., product name ET-43
27) The glass cloth is immersed in the glass cloth, pulled up, and heated at 290°C for 100 seconds to impregnate the glass cloth with silicone resin and form a silicone resin layer on its surface. Note that the amount of silicone resin adhered to the glass cloth at this time was 597 W/.

Next, a PTFE powder with a concentration of 40% by weight was added (manufactured by DuPont Mitsui Fluorochemical Co., Ltd., trade name: TE-33).
13J) Coated on the t-silicone resin layer and heated at 360°C.
Heat for 2 minutes. Furthermore, the application and heating of disverge// was repeated once more, and the PTFE deposited 1/35%.
Form a first PTFEIWI of 0f/d.

After that, PTFEf Ispargyron with glass beads (
3. Manufactured by Bonfluoro Chemical Company, product name TE-3481J
) onto the first PTFE layer and heat at 360'C for 2 minutes. This application and heating were repeated three times to form glass bead-containing PTFENf with a coating weight of 390 F/m.

The blending ratio of PTFE and glass beads in this glass bead-containing PTFE layer forming dispersine is 3 parts by weight of glass beads (spherical diameter 10 to 15 μm) per 100 parts by weight of PTFE.

Next, the same PT as above was placed on the glass bead-containing PTFE layer.
Disverge, yt-coated with FE powder concentration of 40% by weight and heated at 370° C. for 3 minutes. This application and heating
This process is repeated twice to form a second PTFE layer with a PTFE deposition amount of 50 f/Wl.

Then, on the second PTFE layer, an FEP concentration of three places is applied. Apply TE-9503J (manufactured by Michal Co., Ltd., trade name).

The material was heated at 350''C for 2 minutes to form a protective layer with an adhesion amount of 5y7vt, thereby obtaining a blue film structure material (thickness 0.76fi) having the same structure as that shown in FIG.

Example 2 A blue membrane structure material was obtained by carrying out the same procedure as in Example 1 except that four of the eight colored yarns were replaced with uncolored yarns in making the twisted yarn.

Comparative Example A white membrane structure material was obtained in the same manner as in Example 1 except that 8 uncolored yarns were used in place of the colored yarns.

The characteristics of the membrane structure materials obtained in the above Examples and Comparative Examples were
Shown in the table. The test methods for tensile strength, tear strength, light transmittance, and weather resistance are as follows.

[Tensile strength]

It was measured using a universal tensile tester under the conditions of a temperature of 25° C. and a tensile speed of 2G0311/m.

[Tear strength]

Using the trabezoid method of JIS L 1096, at a temperature of 25゛C1 and a tensile speed of 200jfl/m,
It was measured using a universal tensile testing machine.

[Light transmittance]

The visible light transmittance of the film structure material was measured using a spectrophotometer (manufactured by Shimadzu Corporation, trade name: UV-260).

〔Weatherability〕

Membrane structure material r sunshine type 200
After putting it in for 0 hours, it was taken out and the color change was visually judged.

Table 1 is a front view showing an example of the membrane structure material according to the present invention;
FIG. 2 is a schematic diagram showing an example of the structure of a glass cloth used for manufacturing a membrane structure material, and FIG. 3 is a front view showing an example of the twisted yarn constituting the glass cloth.

1...Glass cloth 2...Silicone resin layer 3
．． 5... PTFE layer 4... PTFE layer containing glass beads (effects of the invention) The present invention is constructed as described above, and is based on a glass cloth obtained by coloring glass yarn and processing twisted yarn obtained from the colored yarn. Since the material is made of a material, it is possible to provide a film structure material that has a high level of light transmittance, which can be imparted with fascia properties by coloring while maintaining strength and lightness.

[Brief explanation of the drawing]

Claims (2)

[Claims] (1) A twisted yarn consisting of a plurality of glass yarns including at least one colored glass yarn was processed into a woven fabric, but the surface of the lath cloth was coated with a silicone resin layer, a first polytetrafluoroethylene layer, and a glass bead-containing polytetrafluoroethylene layer. A membrane structure material comprising an ethylene layer and a second polytetrafluoroethylene layer sequentially provided. (2) The membrane structure material according to claim 1, wherein a protective layer made of a fluororesin is formed on the second polytetrafluoroethylene layer.