JPS629939A - Connecting structure of glass fiber cloth coated with fluoro resin in membrane structure - Google Patents

Abstract

PURPOSE:To prevent the permeation of rain water from the connecting edge parts of the glass fiber cloths and to prevent the decrease in the strength of the glass fiber cloths and the strength of the whole membrane structure as the result, by covering the connecting edge parts over more than two connecting surfaces with tapes having specified width and by heat-sealing the connecting surfaces in a body in a membrane structure where glass fiber clothes coated with a fluoro resin are used as the membrane materials. CONSTITUTION:Fluoro resin membranes 1a, 1b are prepared by coating both surfaces of a glass fiber layer 13 with a fluoro resin 12. After the surfaces to be connected 20 of the fluoro resin membrane 1a, 1b and a synthetic resin sheet 2 are put up together, a tape 3 of a specified width covers over the two fluoro resin membrane 1a, 1b and they are heat-sealed from both upper and bottom sides by an iron device 4. The fluoro resin membrane 1a, 1b, the synthetic resin sheet 2 and the tape 3 are thereby tightly connected together in an integral body.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a bonding structure of glass fiber cloth coated with a fluororesin in an outdoor membrane body.

(Prior art) Glass fiber, which has various advantages as a membrane material that complies with building regulations, is durable, and easy to process, has recently been widely used as the core material of membrane materials. It is being said.

This glass fiber is often coated on one or both sides with a fluororesin to form a cloth-like membrane material with improved self-cleaning properties and water resistance.

However, at the bonding surface of these membrane materials that occurs in the process of constructing a membrane body, in the conventional bonding structure of only a heat seal structure shown in FIG. 5, the membrane material is However, there is a risk that the strength of the membrane material may be weakened or that the strength of the entire membrane body may deteriorate.

In addition, those rainwater may turn into water droplets (14) within the glass fiber layer (13) mentioned above, reducing the sunlight transmittance of the membrane material, or become large water droplets (14) that will stay on people's skin. Therefore, there was a drawback that appearance 1 was unfavorable.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned problems, and the present invention has been made in view of the above-mentioned problems.
It also prevents water droplets (13) from entering the glass fiber layer (13) and deteriorating its strength as a membrane material.
14) To provide a bonded structure of glass fiber cloth coated with fluororesin that does not reduce the translucency of the membrane material or cause those water droplets (14) to stay on the person's body. That is the purpose.

(Means to solve problems) Therefore, the inventor.

In a membrane body whose membrane material is glass cloth coated with fluororesin, the bonding end of the membrane material is straddled over the bonding surfaces of two or more of the membrane materials with high bonding efficiency. A bonded structure of glass fiber cloth coated with fluororesin, in which the membrane material is tightly bonded by covering it with a tape of a predetermined width made of the material and then integrally heat-sealing this bonded surface from below F. This is an attempt to solve the above-mentioned problem.

(Embodiments) Hereinafter, preferred embodiments will be exemplarily described in detail with regard to their configurations and operations with reference to the drawings. However, unless there is a specific description, the thickness, material, shape, relative position, etc. of the components described in this example are not intended to limit the scope of the invention to these, but are merely illustrative. Just an example.

FIG. 1 is a perspective view showing a joining structure of glass fiber cloth coated with fluororesin (hereinafter referred to as fluororesin membrane) in a membrane body according to the present invention.

In this example, two fluororesin films (la) (1b
) with a synthetic resin sheet (2) of a predetermined width sandwiched between them. This fluororesin film (la
) (lb) The reason for sandwiching the synthetic resin sheet (2) is to act as a sealant by heat sealing as described later, but the synthetic resin sheet (2) to be used
) may be appropriately determined and may be changed depending on the size of the fluororesin film (la) (lb) to be bonded.

The fluororesin membrane (IaHlb), which has not yet been used, is formed by coating both sides of a glass fiber layer (13) with a fluororesin (12). However, the glass fiber layer (13
) can also be applied to fluororesin membranes (la) and (Ib) in which only one side of the glass fiber layer (12) is coated with a fluororesin membrane (12). la) (lb).

The glass fiber layer (13) used in this example has a diameter of 3
It is made from micron glass fibers and is the thinnest glass fiber on the market, but it has excellent flexibility and nonflammability, making it ideal as the core material for membrane materials. In addition, a fluororesin layer (
In addition to its water resistance, 12) also has the property of being resistant to heat, and has strong resistance to mold and microorganisms.

As shown in Figure 1, these fluororesin films (l
a) Joint surface (10) of (lb) and synthetic resin sheet (2)
) are aligned and overlapped, then two fluororesin films (
1aH1b) from above with a tape (3) of a predetermined width, and then heat-sealed from above and below using an ironing device (4), etc., to combine the fluororesin film (Ia) (tb), synthetic resin sheet (2), and tape. (3) and are hermetically joined in one body (see Figure 2).

This tape (3) may be made of any material as long as it is made of a material with high bonding efficiency, but in this example, 2
A sheet of fluororesin Il! (IaHlb) The same material as the synthetic resin sheet (2) that acts as a sealant is used.
It is also coated with a fluororesin (12) to form a so-called composite tape.

This is because, as mentioned above, this synthetic resin sheet (2) adheres to the two fluororesin membranes (Ia) and (Ib) with good bonding efficiency, and at the same time this tape (3) also adheres to the two fluororesin membranes (Ib).
a) Similar to (Ib) Relationship-1: To utilize the advantage that even if dirt gets on the surface, it is easily washed away by rain etc. due to the water resistance and self-proportion of fluororesin (12). It is.

Therefore, when heat-sealing, if the tape (3) is a composite tape made of a synthetic resin sheet (2) coated with a fluororesin (12) as in this example, the fluororesin coating layer (12) is always heat-sealed. It must be installed on the side facing the vehicle. The width and length of the tape (3) used also depends on the fluororesin film (LA) to be bonded.
It may be determined as appropriate depending on the size of (lb) or the size of the entire membrane body.

When bonding the fluororesin membranes (la) (Ib) and composite tape (3) of this example, it is optimal to heat seal at a temperature of around 150°C, but in experiments, a bonding efficiency of 85% was achieved. It has been obtained.

Figure 3 is a cross-sectional view after heat sealing, showing the fluororesin coating layer (12) of the tape (3) that sealed the joint end (11) of the two fluororesin membranes (la and lb). Due to its water-resistant protection, its joint end (11
) is designed to prevent water from entering the area.

If necessary, as shown in Figure 4, the lower joint end (
11) is also covered with the same tape (3), and the two tapes (
By heat-sealing 3) together in the same way, it is possible to prevent water, etc. generated inside the n-shaped body from entering the glass fiber layer (13), resulting in an even more effective effect. I can do it.

In this example, two sheets of fluororesin 1)! (Ia) (lb)
Although we have explained the bonding structure of
) (lb) is not limited to 2 sheets, but can be used even if it is I-
In addition, the tape (3) is attached to one joint surface (
Two or more sheets may be used for lO).

(Effects) As described in detail below-1, in the bonding structure of the glass fiber layer coated with fluororesin in the membrane body according to the present invention, the bonded ends are covered with a tape with high bonding efficiency, and then -] - By heat sealing from below, a close bond is achieved, preventing rainwater from entering from the joint end of the glass fiber layer, weakening the strength of the glass fiber cloth of the membrane material, and eventually increasing the strength of the entire membrane. It has the remarkable effect of not causing any deterioration.

Furthermore, the tape has a problem in that rainwater accumulates in the glass fiber layer of the glass cloth and becomes water droplets in the glass fiber layer, reducing the translucency of the membrane material, as seen in conventional bonded structures. By turning the water into large droplets and catching people's eyes, the drawback of undesirable appearance can be reliably eliminated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the bonding structure of glass cloth coated with fluororesin in the membrane body according to the present invention;
Figure 2 is a cross-sectional view taken along line A-A in Figure 1, Figure 3 is a cross-sectional view showing the tightly bonded state after heat sealing in Figure 2, and Figure 4 is a cross-sectional view of the present invention in which the lower part of the bonding surface is also covered with tape. FIG. 5 is a perspective view showing the bonding structure of glass fiber cloth coated with fluororesin in a membrane body according to the conventional structure.
It is a sectional view showing a joining structure of III cloth. Explanation of symbols: Fluororesin film...1a/Ib/synthetic resin sheet, 2, Tape, 3, Joint surface, 10, Joint end, , 10. ．． 11,

Claims (1)

[Scope of Claims] 1) In a membrane body whose membrane material is glass fiber cloth coated with fluororesin, the joint end of the membrane material is straddled over the joint surfaces of two or more of the membrane materials. A bonded structure of glass fiber cloth coated with fluororesin that is tightly bonded by covering it with a tape of a predetermined width made of a material with high bonding efficiency and then integrally heat-sealing the bonded surfaces from the top and bottom. 2) The tape is a composite tape formed from a synthetic resin coated with a fluororesin on one side, and the fluororesin coating layer of the tape is provided on the side to be heat-sealed. A bonded structure of glass fiber cloth coated with a fluororesin according to item 1.