JPS63312137A - Net reinforced structural film - Google Patents

Abstract

PURPOSE:To obtain a widened net reinforced structural film while contriving to improve fearing strength by a method in which knots or fixed parts are formed at the crossing parts of the meshes of the net made by using a specified material, a thermoplastic resin film is fixed to at least one of the net surfaces and is made composite. CONSTITUTION:The twined yarn or knitted rope obtained by twining or knitting single or mixed organic fiber with a high knot strength such as aromatic polyester fiber, aromatic polyamide fiber, polyphenylene sulfide fiber or fluorine resin fiber, is formed. Warplike members 1 and weftlike members 2 are made into a latticelike net. In all crossing parts of each warp and weft members 1, 2, the knots 3 such as a fish net are formed to prevent the mutual sliding between the members 1, 2, whereby a netlike reinforcing base member 4 is constituted. Thermoplastic resin films 6, 6 are connected with the upper and lower both net-surfaces of the netlike reinforcing base member 4 and are made into a composite, whereby the integrally composed net-reinforcing structural film 7 is formed. The thermoplastic resin is molten state under heating is directly stuck onto the netlike reinforcing base member 4, whereby the film can be made, and also by this process, net reinforced structural film can be obtained.

Description

Detailed Description of the Invention (a) Field of the Invention This invention is applicable to, for example, awnings of shopping arcades, membranes of membrane structures, canopies or ponds and waterways, pond membranes of chemical storage tanks, etc. This invention relates to membranes with a network-reinforced structure, such as those used as such.

(b) Background of the Invention Conventionally, membrane materials for membrane structures have been glass fibers and aromatic polyamides.
Fabrics are known in which a woven cloth made by plain weaving I is used as a reinforcing base material, the reinforcing base material is impregnated and coated with a fluororesin, and then heated and baked.

In the case where the base material is a woven fabric such as the above-mentioned plain weave, a binding agent is applied to the surface of the glass fibers used for the warp and weft yarns.

This sizing agent is used for the purposes of preventing damage to mH during the spinning and processing of glass fibers, improving processing efficiency, and improving the adhesion between glass fibers and fluororesin. This sizing agent includes a coupling agent, a binding agent, a lubricant, an antistatic agent, a PH adjuster, and the like.

The above-mentioned sizing agents are broadly classified into plastic-based and starch-based sizing agents, and the former plastic-based sizing agents are mainly used in roving products, and remain in the fluororesin that is impregnated and coated after fabrication.

On the other hand, Gosho's starch-based sizing agent is mainly used for twisting yarns, and is incinerated and removed after it is made into textiles.

However, the above-mentioned mountain-based sizing agents do not have sufficient cohesive force to strongly fix the weaving yarns, but only have a cohesive force that lightly suppresses the fraying of the threads of the fabric.

As a result, the warp yarn and the weft yarn are only bound together by the adhesive force of the resin obtained by heating and baking the fluororesin that is impregnated and coated.

Therefore, there was a problem in that the strength of the joints of the membrane material was low, and the tensile strength and tear strength of the entire crotch were also low.

The following table summarizes the strength characteristics of commercially available fabrics made by impregnating and coating fluororesin on a conventional plain-woven glass fiber cloth and a plain-woven aromatic polyamide fiber and baking them in a tS lagoon.

Summary of strength characteristics of commercially available products What is Kevlar?
High elastic fiber (aromatic polyamide fiber) registered trademark of T company
It is about.

As is clear from the table above, there was a problem in that the tear strength was low.

Furthermore, since the above-mentioned membrane for IN construction generally has a large structure, many joints 1] are required for the above-mentioned maintenance.
For this reason, a joint [hole number 1] is added and 11% J processing is performed, but when performing such processing, 'CJ,! This has the problem of making it difficult to widen the membrane because the fabric fibers have to be cut and the tear strength further decreases.

(c) Purpose of the Invention This invention provides a membrane joint strength equivalent to that of a non-seamed membrane material, which ultimately allows the membrane material to be made thinner.
The purpose of the present invention is to provide a membrane with a reinforced network structure that allows the membrane to be made wider.

(d) Structure of the invention This invention relates to aromatic hexagroup polyester fibers, aromatic polyamide fibers, polyphenylene lylphide fibers, and fluororesins.
The net is made from yarn spun from organic fibers such as i+H or b made into a lobe shape, and knots or fixing parts are formed at the intersections of the mesh, and a thermoplastic resin film is formed on at least one side of the mesh surface. A reinforced network structure that combines
It is characterized by being 1XJWA.

(e) Effect of the invention According to this invention, the net! Since the above-mentioned high-knotty strong NaH is used as the IN, the necessary toughness can be easily obtained as the membrane material.

Moreover, fundamentally different from conventional plain weave cloth, the reinforcing base material at the crotch has a net structure with knots or fixed parts at the intersections, so the tear strength is n, reducing the strength of the membrane seams. Therefore, there is no need to make the strength t of the A joint part of the entire membrane higher than necessary, and the membrane material can be made thinner overall, and the membrane can be made wider.

(f) Examples of the invention An embodiment of the present invention will be described in detail below based on the drawings.

The drawings show a network-reinforced membrane, and in Figures 1 and 2,
y''J apricot group polyester fiber, 7MIM polyamide fiber (commonly known as aramid blue, aran+id fiber), polyphenylene sulfide (polyphc
ny-1ene 5ulfide) It (PPSI
M), Right N for high knots and strong fibers such as filamentous resin fibers!
1H +i-spun or blended fibers are twisted into yarn or rope-shaped (cotton-making) (hereinafter, both the above-mentioned yarn and rope are abbreviated as a filament), and a vertical filament 1.
...and E] Co-filament phase 2... The net is made into a lattice pattern, and the filament 1.2 phase is dark at all intersections of the above-mentioned vertical and horizontal filaments 1.2. In order to prevent slippage, knots 3 like those of a fishing net are formed to constitute a net-like reinforced rA material 4.

Here, the above-mentioned filament 1.2 is 1200 if it is a twisted yarn.
For ropes with a denier (dcnier) or higher, use a rope with a diameter of 0.8 to 2.5 sφ, and a mesh size of 5...
・The quality of the - side is about 2.5 to 25 aw.

The thermoplastic resin film 6.6 is bonded and composited to both the upper and lower mesh surfaces of the net-like reinforcing base material 4 configured as described above, and is integrated into a finely reinforced structure g! 7 is formed.

Examples of the above-mentioned thermoplastic resins include polymers made of linear molecules produced by addition polymerization such as polyethylene, polystyrene, and polyvinyl chloride, and polycondensates of bifunctional monomers such as polyester and nylon. The film thickness after forming the resin film 6.6 is 0.1 to 1.0
Set to m.

The mesh-reinforced structure membrane 7 thus obtained is composed of the mesh-like warp threads 1 and the weft threads 2! Since the above-mentioned high-knot-strength comb material is used as the ill, the strength required for the membrane material can be easily obtained.

The following table shows the basic properties of various fibers.

Base Characteristics of Various FibersEconol, Kepler 49, and Technora are all trademarks.Econol mentioned above is PolyA manufactured by Sumitomo Chemical Co., Ltd., which is a copolymerization of P-oxybenzoic acid, aromatic dicarboxylic acid, and aromatic diol. The dioxybenzylene resin and Kevlar 49 are polyamide fibers manufactured by DuPont, USA, and Technora is a polyamide fiber manufactured by Teijin Kasei Corporation.

However, the above-mentioned finely reinforced structure 1l17 is fundamentally different from the conventional plain weave cloth, and the reinforcing base material 4 of the membrane 7 has a net structure with knots 3 at the intersections, so the tear strength is high and the membrane joint Since there is no decrease in strength at the joint, there is no need to increase the strength of the non-joint portion of the membrane 7 body more than necessary, and as a result, the membrane material can be made thinner.

Instead of bonding and composite the thermoplastic resin film 6.6 to the net-like reinforcing base material 4 to form the net-reinforced structure film 7 as described in E, the thermoplastic resin in a heated and molten state is directly networked to the above-mentioned net-like reinforcing base material 4. A network-reinforced structure membrane can also be obtained by forming a film similar to that described above by adhering to the surface, and when formed in this manner, the same effects as described above are achieved.

Furthermore, even if a thermoplastic resin is impregnated and coated on the net surface of the above-mentioned net-like reinforcing base material 4 to form a doorting film, the net reinforcement structure film can be obtained by heating and baking to form a film film. Even if formed in this way, the same effects as described above can be achieved.

When joining the reinforced reinforced structure RPA7, which has been blued as described above, for the purpose of widening it, use mesh 5 and sew 1J to create a reinforced mesh structure with a wide area without missing the mesh at the cut end of the rope. membrane can be obtained.

In addition, if airtightness is required for the above-mentioned seam, for example, ethylene-vinylacetate copolymer (several thousand ethylene-vinyl acetate) may be used in the above-mentioned overseam portion.
Films (not shown) coated with a bot-melt adhesive made from pol-ymer, EVA) may be stacked and bonded together under heat, or the resin crotch t may be directly airtightly joined by one stage of ultrasonic melting. Good too.

Furthermore, a specific I
When a resin film is formed using M resin, the resin films can be bonded to each other at room temperature, so when used as a film, it becomes a crotch with excellent repairability. In this case, in combination with the elasticity of the net-like reinforcing base material 4, a film 7 having good elasticity can be obtained.

3 and 4 show other embodiments of the net-like reinforcing base material 4,
In this example, the fibers are made of single or blended fibers that have high knot strength such as aromatic polystellate fibers, aromatic polyamide fibers, polyphenylene sulfide (PPS) fibers, and filamentous resin fibers. A filamentous body 8 is formed, and the filamentous body 8 is braided and twisted so that the meshes 9... have a regular hexagonal shape as shown in the figure, which corresponds to the knot 3 of the previous example. The twisted part 10 as a fixed part is fixed with a hot-melt resin (adhesive) to prevent deformation.

Here, the length of the negative side of the regular hexagonal mesh 9 is set to about 2.5 to 25 m.

Even if a thermoplastic resin film is bonded and integrated on the 11 sides or both sides of the net-like reinforcing base material 4 configured in this way using the same means as described above, almost the same effects as in the previous embodiment can be obtained. Therefore, in FIGS. 3 and 4, the same parts as in FIGS. 1 and 2 are given the same numbers, and detailed explanation thereof will be omitted.

In summary, the network reinforced structure film 7 is made by integrating the thermal iTJ plastic resin film 6 on at least one side of the network reinforcement base material 4 made of fibers with high knot strength by thermal welding or other means, so that the tear strength is high. Since there is no decrease in strength at the membrane seam, there is no need to increase the strength of the non-seamed part of the membrane 7 more than necessary, and as a result, the wAH material can be reduced to λ9, and the membrane This has the effect of making it possible to widen the width.

Regarding the correspondence between the structure of this invention and the above-mentioned embodiments, the spun yarn of this invention, which was made into a lobe shape, is as follows:
Corresponding to the warp filament 1, weft filament 2, and filament 8 of the example, the net made corresponds to the net reinforcement base material 4, and the fixing part is
Although the twist portion 10 is fixed with a hot melt adhesive, the present invention is not limited to the configuration of the embodiment described above.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a partial plan view of a network-reinforced structure membrane, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 shows another embodiment of the network-reinforced base material. Floor plan, 4th
The figure is an enlarged view of FIG. 3. 1... Vertical filament 2... Horizontal filament 3...
- Knot [14... Net-like reinforcing base material 6... Thermoplastic resin film 7... Net-reinforced structure membrane 8... Thread-like body 10...
Twisted part - NF')

Claims (1)

[Claims] 1. Aromatic polyester fiber, aromatic polyamide fiber,
Netting is made from yarn spun from organic fibers such as polyphenylene sulfide fibers and fluororesin fibers, or rope-shaped ropes, with knots or fixing parts formed at the intersections of the mesh, and at least one side of the mesh surface. A network-reinforced structure membrane made by bonding a thermoplastic resin film to a composite film. 2. The network reinforced structure membrane according to claim 1, wherein a thermoplastic resin is heated and melted on at least one side of the network surface to form and strengthen a film directly on the network surface. 3. The network reinforced structure membrane according to claim 1, wherein a thermoplastic resin is impregnated onto the network surface to form a coating film, and then heated and baked to form a film.