JPH02165946A - Isotropic film structure material - Google Patents

Abstract

PURPOSE:To reduce the degrees of mechanical strength and anisotropy of elongation of an isotropic film structure material by employing 3-axis glass fiber cloth of specific crossing angle as a base material. CONSTITUTION:A 3-axis glass fiber cloth 10 used as the base material of a film structure material is so woven that the crossing angles a1, a2, a3 of three glass fiber yarns 8, 9 and 10 are all approx. 60 deg., and silicone resin layers 2 are formed in a thin layer state on both side faces of the 3-axis glass fiber cloths 1, 10. Polytetrafluoroethylene(PTFE) for forming a first PTFE layer 3 formed on the silicone resin layer 2 desirably has 3X10<6>-4X10<6> of molecular weight from the views of a coating film strength, and adhesive properties with silicone resin. Further, a glass bead-containing PTFE layer 4 and a second PTFE layer 5 are formed on the first PTFE layer 3. Thus, the film structure material having isotropy in the mechanical strength and elongation is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Minute Hand) The present invention relates to a membrane structure material which is made of glass-cloth as a base material and has 1 mechanical strength 2 and isotropic elongation.

(Prior art) In recent years, air/
Examples of applying S structure and tension structure are increasing.

These air membrane structures and tension structures are
) has the following characteristics.

(a) The large span structure is small enough to be installed directly on the roof and can be over-the-air.

(b) Since it has translucency, artificial lighting during the day is not necessary, and the transmitted light is soft without shadows, creating a completely new indoor space that feels like being outdoors.

(c) The shortening of the construction period required for roof construction work is OT#@.

The membrane structure material used for such roofs is one in which 7 silicone resin l-, polytetrafluoroethylene (hereinafter referred to as PTFE) layer, and glass beads KPTFEJ- are sequentially formed on the surface of glass-miscellaneous cloth. It is known (Special Publication No. 55-7148).

and glass fiber cloth 7 as a base material of the m-structure material.
As shown in Fig. 4, an fc biaxial flat cross was used in which two glass fiber threads 8.9, a warp and a weft, were intersected at a crossing angle of 90°.

(Problems to be Solved by the Invention) However, as shown in FIG. 5, membrane structure materials obtained using biaxial flat glass fiber yarns have large differences in tensile strength and elongation in the direction vC (anisotropic ) I ran into a lot of stuff.

Membrane #II construction materials used in buildings are naturally required to have a high degree of safety, but the conventional products mentioned above have anisotropy in mechanical strength and elongation properties, making them difficult to shape.

There were many restrictions on size etc.

Therefore, the overall object of the present invention is to provide a next-layer structure material with the degree of anisotropy in mechanical strength and elongation as low as possible.

(Middle stage for solving the problem) As a result of careful study to solve the problems described above in the prior art, the present inventor has found that three glass fiber threads have an intersecting angle of about 60°.
The inventors discovered that an isotropic membrane structure material can be obtained by weaving VC (sea urchin) into 3@glass-miscellaneous cloth and using n as a base material, thereby completing the present invention.

In other words, according to the present invention, the isotropic membrane structure material has an intersection angle of about 60°.
On the surface of triaxial glass fiber cloth, -/recone resin layer, first PTFE@, glass beads containing 'TFE no and! @20PT FfL skin is formed sequentially.

The IC of the present invention is used as a base material for a film structure material.
The 3-axis gas 2 fabric lO is as shown in Figure 5g2.

3 pieces of glass - pongee thread 8, 9j? and 11 is the intersection angle al.

&@, &3 are set so that the angle is approximately 60°.

When we measured the tensile strength 2 and elongation t in each direction of this triaxial glass-miscellaneous cloth, we found that the direction 1c was as shown in Figure 3.
It is isotropic with small differences due to

The present invention will be described in detail below with reference to one drawing. In the drawing, l is 3 as the base material in the membrane+S relic material.
A thin film of silicone resin No. 2 is formed on both sides of the shaft glass (6#) made of miscellaneous cloth.

When providing a silicone resin layer on the surface of the glass cloth, the silicone resin is impregnated into the surface of the glass cloth, and small particles 111 are formed in the weave of the glass fibers forming the fiber cloth. It is preferable to fill the resin with 8-strength china clay and to improve water resistance.

Commercially available glass cloth usually has a sizing agent attached to it.
It was found that this impregnating agent could be an inhibiting factor for the impregnation of the 7 silicone resin.

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

Silicone resin is f! IJi! Is the emulsion released by the chemical industry, East Silicone, or Dow Corning? 7' version is commercially available, and these can also be used.

Glass - impregnate cloth with 7 silicone resin and 4
When the thickness of the silicone resin is increased, the flexibility of the resulting membrane structure material increases, but the density of the fabric and silicone resin is low.

It has been found that no delamination may occur due to the action of mechanical stress. - It has also been found that when the amount of silicone resin applied is reduced, the resulting membrane structure material becomes hard and may cause folds or cracks in the fabric.

Therefore, in one aspect of the present invention, the silicone resin is applied to the glass fiber cloth for about 10 yards/day or more.

Preferably it is about 4 to 61/rrt'.

However, the first P formed on the silicone 4iB fat layer 2
PTE"E forming the TFE layer 3 may be a conventionally used powder with a molecular tzxio or less F, but from the viewpoint of coating film strength f and adhesion to the silicone resin, the molecular weight is 3XlO' to 4XlO. 2. The attachment of this PTFiDjtlJ3 is not particularly limited, but it is usually 8.
υυ〜6υOI/! Demeru.

In the present invention, on the first PTFE ttA 3, MPTFE containing glass beads 4 and the second PTF are further added.
'E skin 5 is formed.

The main purpose of PTFE 1144 containing glass beads is to improve light transmittance due to the growth of glass beads, and it can also be used to improve wear resistance against wind, rain, sand, etc.

This (/J/ll!40 adhesion amount is 2 usually about 11~50o
It is f///. Glass beads can be either hollow or solid, and their diameter is usually 1.

It is about 1-50μ ant.

This glass bead-containing PTFE/cocoon 4 to 2)'
The blending ratio of TFE and glass beads is determined by the coating strength, PT
Considering the adhesion with FEJ-3 and 5, PTFE
It has been found that it is preferable to use 1-5 directly shaken parts of glass beads per 47111 parts of LOOO.

In the present invention, it has also been found that it is suitable to blend a coloring agent into the glass bead-containing PTFE/jll4 in order to obtain a colored membrane structure material.

-# The amount of coloring agent added may vary depending on the type.

Usually, it is 3 to 10 parts per 30 parts of PTFE It.

In addition, when forming PTF8114 containing glass beads (-C), a temperature higher than the melting point of PTFE is applied, so when using colorant gold, use a heat-resistant material that does not cause changes even at such high temperatures. Specific examples of such heat-resistant colorants include cadmium-based additives for red colors, chromium t'fF: and mium-based additives for orange colors, and titanium oxide for yellow colors. Carbon km can be used for cadmium-based or cadmium-based, green, blue or brown, and cytecalcin-based for black.

The glass beads-containing PTFIE/#I4 has a relatively rough surface due to the M content of the glass heath.
The PTFE J trout 5t-9 surface was made smooth. The adhesion t of this PTFE J trout 5 is usually 50 to 1LlOg/i, and may be smaller than the first PTFEjtJ3. Then, by coating the glass beads-containing PTFE)l14 with a thin P'l''F12715, the /i1
The glass bead-containing PTFE layer 4'J? and PTFE
The PTFE used in the form J [C of IfllJ 5 is
As in the case of FE 11143, a low-molecular powder with a molecular weight of J12XLU or more may be used, but from the viewpoint of coating strength and adhesion to adjacent materials, it is recommended to use a powder with a molecular weight of 3X10 to 4XIL1.
It is preferred to use a high molecular weight powder.

The membrane structure material of the present invention thus comprises 3@glass fiber cloth IfiVc, silicone resin II 2 , g 1 (O
PTF"j; J-3, containing glass beads)"rFE J
1 4 and the second PTFB III 5 k are sequentially formed and have the structure 7, but furthermore, a tetrafluoroetherene-hexa-hexafluoroglobilene co-metallic polymer (hereinafter referred to as
(referred to as FEP).

A layer consisting of a tetrafluoroenalene-perfluoroalkyl vinyl ether coordinating body or the like can also be formed on PTFEJf15 and fiIr116.

(Example) Hereinafter, the present invention will be explained in detail with reference to examples.

Example 1 Triaxial glass-miscellaneous cloth with an intersecting angle of about 60° (manufactured by Kirifaprix Co., Ltd., trade name: Glass Cross Rod 151)'Th
Heat at 360° C. for 10 seconds to remove the isting agent and foreign particles.

This 4! Q-fiber is used as a silicone emulsion with fat release rate of 3.9% modification (Dow Konin Co., Ltd., ma name gT-432)
7) Immerse it in the liquid, pull it out, and heat it at 290-C for IOL>seconds to impregnate the core-rag Vζ silicone resin and form a silicone resin fkJ on its surface.

Note that the amount of silicone resin adhered to the fiber cloth at this time was 511/d.

Next, a dispersion of PTFE powder a degree 4o directly shaken (manufactured by DuPont Mitsui Fluorochemical Co., Ltd., product name TE-: 3
313J) Apply to f7 silicone resin no soil.

Heat at 360°C for 2 minutes. Repeat the coating and heating of disversion once more, and apply the PTFE to 3509/d.
Form nk.

After that, DP'l'F'E disversion with glass beads (manufactured by DuPont Mitsui Fluorochemical Co., Ltd., product name TE-
3481J) k'i14. 1 of PTFEI- and heated at 360° C. for 2 minutes. This application and heating were repeated 43 times. PTFE containing glass beads of @/ze is formed.

The blending ratio of 1/c3 PTFE and glass beads in this dispersion for forming a PTFE layer of glass beads is P'r''FEIUU yc to Glass Heath (spherical diameter 10-15 μgn) J fffffi It is.

Next, on the Pi'FEJ-V containing 72 Russ beads, the same PTFE powder as above was coated with 0% dispersion purple and incubated at 350° C. for 2 minutes in mM. Repeat this application) and heating twice, and apply k'TFEO4'jk5t)
11/, 1oM2tvpTFz@* is formed.

Next, k"J'l?E III k IIch of ditch 2
kP m degree J u tun withdrawal/.

Disversion (Mitsui Dupont Fluorine 10 Pieces Atsushi Atsushi 1 Song Product Name TEE-95tJ3J) Whole Blood Cloth, 350
℃ for 2 minutes (1&l heat, with protection of 4*551/r!
form Δ.

The membrane structure material M (thickness t) having the same structure as in Fig. 1 (8 C1) was replaced with Samurai fI-6 Comparative example 3@Glass-rag with a cross angle of 60°, and the cross angle was 900.
All operations were carried out in the same manner as in the example except that plain weave glass fiber 4Lk was used. j.

k, the role of the membrane structure material used in the Examples and Comparative Examples, t1
Table 1 V shows the results of measuring the tensile strength and elongation t at a predetermined angle rc from the base point (0°). Note that the measurements are at a temperature of 25"C and a tension of V
The soil was tested using a universal tensile test screw with a rod at a speed of 21 JOm/min.

Table 1 (Effects of the Invention) The present invention is based on the above-mentioned method, and uses J-axis glass 41d#I/f5 with an intersecting angle of approximately 60° as the base material. It is characterized by its ability to provide a g-structured material with isotropic strength and elongation.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of the film-damaging material according to the present invention;
Fig. 2 is a schematic diagram showing the structure of the three-barrel glass fiber cloth used in the present invention, and Fig. 3 is a graph showing the tensile strength 2 and elongation in each direction of the cloth. FIG. 4 is a schematic diagram showing the plain weave glass fiber cloth VCsp used for the conventional membrane #1 construction material, and FIG. tension in each direction I)!
ii! 2 is a graph showing II hardness and elongation. l...3@Glass-Miscellaneous stones 2...Silicone tree blade/m1ld, 5...PTFE I cocoon 4...Glass beads included' PTFE no patent - Applicant Nitto (Representative of Kogyo Co., Ltd.) mt Goro Figure 1/ ---3 # Bukuzu Heyao L Condolence 4 ---71'7λ
Heath, Iku PTFE42---Silicone shield phase 1 3.5-PTFE, II Fig. 2 Fig. Fig. 70m Fig.

Claims (1)

[Claims] A silicone resin layer, a first polytetrafluoroethylene layer, a glass piece-containing polytetrafluoroethylene layer and a second
An isotropic membrane structure material consisting of successive layers of polytetrafluoroethylene.