JP2003285359A - Method for manufacturing composite film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an industrially advantageous method for efficiently manufacturing a composite film composed of a fibrous cloth, a thermoplastic resin and a low He gas-permeable film, with the low generation rate of a defective product due to creases and the like. <P>SOLUTION: This method for manufacturing a composite film composed of the fibrous cloth, the thermoplastic resin and the film comprises the step to melt-extrude the thermoplastic resin into a thin film at a temperature above a melting point and below a temperature level exceeding a decomposition point by 10°C to give a molten thin film and the step to sandwich it between the fibrous cloth and the film with a helium gas permeability of 600 cc/m<SP>2</SP>/24 hr/0.1 mm/atm or less. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a composite membrane, and more particularly to a composite membrane suitable for use in space / aviation equipment such as large airships or balloons, which is difficult for gas to permeate, The present invention relates to a method for producing a composite film capable of storing helium gas and the like therein and stabilizing the shape of space and aviation equipment under severe conditions at high altitudes such as the stratosphere.

[0002]

2. Description of the Related Art In recent years, communication technology using communication satellites has been developed, and mobile phones and mobile terminals that can be used all over the world are now spreading all over the world. However, launching a communication satellite requires enormous cost and labor. Therefore, recently, the possibility of using the stratosphere as an alternative to communication satellites has been sought. The stratosphere is the atmosphere around 10 to 50 km from the ground, and the wind speed is mild especially near the altitude of 20 to 22 km. In addition, it is always sunny, and it is possible to use solar energy efficiently. These conditions are convenient as a communication base.

Currently, the Ministry of Education, Culture, Sports, Science and Technology and the Ministry of Internal Affairs and Communications are jointly working on research and development of a "stratospheric platform". The stratospheric platform is to use a huge airship floating in the stratosphere as a platform.
New communications and broadcasting in the century (eg digital broadcasting,
It is expected as a base for mobile terminals, ultra-high-speed internet, mobile communication, etc., earth observation (for example, ocean, atmosphere, etc.), and disaster monitoring (for example, forest fire, red tide, etc.).

The above-mentioned stratospheric platform plan requires that a large airship with a total length of 150 m or more be elevated to the altitude of the stratosphere where air is thin. The airship is required to be lightweight in order to obtain sufficient buoyancy, and the outer film forming the airship is required to be lightweight and high in strength. Furthermore, in the stratosphere, the surface temperature of the outer coating becomes 100 ° C. or higher due to direct sunlight, so that the outer coating forming the airship is also required to have heat resistance. In response to the above-described requirements, a lightweight, high-strength, low He gas permeability, and high heat-resistant composite membrane have been developed (Japanese Patent Application No. 2001-334105).

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, a fiber cloth, a thermoplastic resin, and a helium gas permeability of about 600c are produced efficiently, and defective products such as wrinkles are less likely to occur.
c ^/ m 2 /24hr/0.1mm/atm less is a film (hereinafter, "He gas low-permeable film" hereinafter.) aims to provide an industrially advantageous method for producing from become composite film To do.

[0006]

Means for Solving the Problems The inventors of the present invention have used a previously developed fiber cloth with a polyester elastomer or a composition containing a polyester elastomer (hereinafter, simply referred to as “polyester elastomer”) as an adhesive and He.
The industrial manufacturing method of the composite membrane characterized by compounding the low gas permeability film was examined. As a method for producing the composite membrane, a polyester elastomer that has been formed into a film in advance is used, and the fiber cloth, the film-formed composition, and the He gas low-permeability film are superposed, and hot pressed at a temperature of 160 to 240 ° C. A thermal lamination method in which a roll or the like is used to form a composite by heat fusion is mentioned. However, in such a manufacturing method, it was found that after lamination, the composite film is cooled to shrink the polyester elastomer, which may cause defects such as wrinkles in the fiber cloth and the He gas low-permeability film. . It was also found that when carbon is contained in the polyester elastomer, the elastomer penetrates too much into the fiber cloth, carbon is deposited on the surface of the fiber cloth, and the appearance of the fiber cloth may be impaired. It was

Therefore, as a result of intensive studies to solve the above problems in the manufacturing process of the above composite film, the present inventors have melt-extruded the polyester elastomer into a thin film at a temperature not lower than the melting point and not higher than the decomposition point, and It has been found that the above problems can be solved by using a method of sandwiching the thus-produced molten thin film between a fiber cloth and a He gas low permeability film. Furthermore, it was also found that if the fiber cloth is heated in advance, the resulting composite film is less likely to wrinkle. Further, it was also found that the use of such a manufacturing method improves the processing speed as compared with the case where the thermal lamination method is adopted and enables efficient manufacturing, and is therefore suitable for industrial manufacturing. Furthermore, the inventors of the present invention have made diligent studies and found that the above composite film can be produced efficiently and without wrinkling, even if another thermoplastic resin is used instead of the polyester elastomer. . The present inventors have made further studies and completed the present invention.

That is, according to the present invention, (1) a molten thin film is produced by melt-extruding a thermoplastic resin into a thin film at a temperature not lower than the melting point and not lower than the decomposition point and higher than 10 ° C. permeability 600cc ^{/ m 2/2}
A method for producing a composite membrane composed of a fiber cloth, a thermoplastic resin and the film, which is characterized in that it is sandwiched by a film having a rate of 4 hr / 0.1 mm / atm or less, and (2) heating the fiber cloth in advance. The method for producing a composite membrane according to (1) above, (3) wherein the heating temperature is 30 to 5
The method for producing a composite film as described in (2) above, wherein the temperature is 00 ° C., and (4) the heating means is a corona discharge treatment, according to (2) or (3) above. A method for manufacturing a composite membrane.

According to the present invention, (5) the processing speed is 10
~ 400 m / min, (1) ~ characterized in that
(4) The method for producing a composite membrane according to (4), wherein the fiber cloth is selected from a fiber bundle, a woven fabric, a knitted fabric, a non-woven fabric, a net-like product and a honeycomb-like product.
(7) The method for producing a composite membrane according to (5), (7) the material of the fiber cloth is aramid fiber, carbon fiber, glass fiber, boron fiber, ceramic fiber, polyethylene fiber, polyketone fiber, polyparaphenylene benzobisoxazole fiber, The composite membrane according to (1) to (6) above, which is one or more kinds of fibers selected from the group consisting of wholly aromatic polyester fibers, polyamide fibers, polyester fibers, polyimide fibers and polyvinyl alcohol fibers. The manufacturing method of.

The present invention also provides (8) wherein the thermoplastic resin is
(1) above, which is polyphenylene sulfide, polyester, polyamide or polyurethane
To (7), the thermoplastic resin is a polyester elastomer or a composition containing a polyester elastomer. (9) The composite membrane according to (1) to (7), Manufacturing method, (10)
The film is aramid film, polyimide film,
Polyester film, nylon film, polyphenylene sulfide film, ethylene-vinyl alcohol copolymer film or fluorine film, (1) to (9) above, (11) above ( A composite membrane produced by the method according to any one of 1) to (10).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The method for producing a composite membrane of the present invention comprises melt-extruding a thermoplastic resin into a thin film at a temperature not lower than the melting point and not higher than the decomposition point, and the molten thin film is made of a fiber cloth and a He gas low permeability film. It is characterized by sandwiching. Such a manufacturing method can be easily performed according to a known technique called extrusion sand laminating or sandwich extrusion laminating. As described above, the thermoplastic resin is usually heated to a temperature equal to or higher than the melting point and equal to or lower than the decomposition point. Depending on the type of thermoplastic resin, it may be possible to heat at a temperature above the decomposition point. For example, when the polyester elastomer described below is used as the thermoplastic resin, the decomposition point (280
The temperature can be heated to about 290 ° C. or higher, which is about 290 ° C. Such cases are also an implementation of the present invention. Hereinafter, in the present specification, a temperature in a range from the melting point to a temperature exceeding the decomposition point by about 10 ° C. is simply referred to as “above the melting point and below the decomposition point”.

Specifically, a molten thin film of a thermoplastic resin that is heated and melted at a temperature of not lower than the melting point and not higher than the decomposition point and continuously extruded into a thin film is laminated on the fiber cloth, and at the same time, the opposite side, that is, the heat is melted. A method is preferred in which a He gas low-permeability film is laminated on the molten thin film of the thermoplastic resin from the side opposite to the laminated surface of the molten thin film of the plastic resin with the fiber cloth, and the obtained laminate is pressure-bonded and cooled. It is mentioned as an aspect.

In the method for producing a composite membrane according to the present invention,
Before the laminating process, that is, the fiber cloth and He
Before adhering the low gas permeability film to the thermoplastic resin, the fiber fabric and / or the He low gas permeability film may be pretreated in advance. The pretreatment may be performed on the whole of the fiber cloth or / and the He gas low-permeability film, or may be performed on a part of the film, preferably on the laminated surface with the thermoplastic resin. In the present invention, it is preferable to pretreat the fiber cloth. Hereinafter, the pretreatment of the fiber cloth will be described, but the same is true when the pretreatment of the He gas low permeability film is performed.

As such a pretreatment, it is preferable to preheat the fiber cloth. By preheating the fiber cloth in this way, the temperature difference between the fiber cloth and the molten thin film of the thermoplastic resin during lamination is reduced, and the resulting composite film is less likely to wrinkle, and defective products are not generated. Can be suppressed. Here, the preheating temperature can be appropriately selected depending on the type of the fiber cloth and the like, but is about 30 to 500 ° C., preferably about 30 to 3 ° C.
It is preferably about 00 ° C.

The preheating may use known means,
Examples thereof include corona discharge treatment, warm air heating, heating with a heater, infrared rays, or hot rolls.
These means may be used alone, or two or more means may be combined. Above all, it is preferable to use the corona discharge treatment. The corona discharge treatment is carried out, for example, by using a known corona discharge treatment machine and passing the fiber cloth under the generated corona atmosphere. Here, the atmosphere of the corona discharge treatment may be an atmosphere or an atmosphere adjusted with an inert gas (for example, nitrogen) or the like. The corona discharge treatment is preferably performed under the conditions of about 3 to 13 kW, more preferably about 4.5 to 8.5 kW.

Examples of the above-mentioned pretreatment include electron beam irradiation treatment, ultraviolet ray irradiation treatment, flame plasma treatment, atmospheric pressure plasma treatment or low pressure plasma treatment. By such a treatment, an activation point above a certain level is generated on the laminated surface of the fiber cloth with the thermoplastic resin, and firm adhesion with the thermoplastic resin becomes possible. In addition, for corona treatment,
In addition to the heating action, it also has the above-mentioned action.

The processing speed in the method for producing a composite membrane according to the present invention is preferably about 10 to 400 m / min, more preferably about 30 to 200 m / min. In the present invention, by adopting the method as described above, it is possible to set the processing speed to a high value as described above, and there is an advantage that working efficiency is improved.

A particularly preferred method for producing the composite membrane according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a preferable apparatus for producing a composite membrane according to the present invention. First, the thermoplastic resin (B) is charged into the extrusion device 2 and the thermoplastic resin (B) is heated to a melting point or higher and a decomposition point or lower to bring it into a molten state. The thermoplastic resin (B) at the time of charging may be pellets or powder, and its shape is not limited.

The molten thin film (B ') of the thermoplastic resin continuously extruded in a thin film form from the extruder 2 is a press roll 5
And sent to the chill roll 6. Further, the fiber cloth (A) fed from the feed roll 1 is preheated by the corona discharge treatment device 4 and conveyed to the press roll 5 and the cooling roll 6. Further, from the side opposite to the fiber cloth (A), that is, from the side opposite to the laminated surface of the molten thin film (B ′) of the thermoplastic resin with the fiber cloth (A), the press roll 5
He gas low permeability film (C) on the cooling roll 6
Send in. In this way, the molten thin film (B ′) of the thermoplastic resin is sandwiched between the fiber cloth (A) and the He gas low permeability film (C), and the press roll 5 and the cooling roll 6 press-bond and simultaneously cool.

The press roll 5 is made of a material having high hardness,
Preferably the hardness is about 40-160 degrees, preferably about 5
It is preferably formed of a material having a temperature of about 5 to 105 degrees, and specific examples thereof include a silicon roll. The cooling roll 6 preferably has a function of cooling the composite film, such as a water cooling pipe. The cooling temperature is about 5 to 30 ° C, more preferably about 10 to 20 ° C.
It is preferably about the same. The material of the cooling roll 6 is preferably made of metal or the like. The composite film (D) composited by the press roll 5 and the cooling roll 6 is finally wound up by the winding roll 7.

In the production method of the present invention, other steps may be added as long as the above steps are included. For example, in order that the composite film according to the present invention can withstand UV irradiation, a step of providing another UV protective layer on the outside of the He gas low permeability film may be added. The ultraviolet protection layer can be provided by, for example, laminating a fluorine film or a metal foil such as aluminum, copper, silver or gold, or depositing aluminum, copper, silver or gold, or the like. The laminating step and vapor deposition step may be performed according to known methods.

In addition, in the above "other step", in order to protect the He gas low-permeability film and improve the durability of the composite film, the He gas low-permeability film is contacted with the outside, that is, the thermoplastic resin. There is a step of providing a resin layer on the non-coated side. The resin used for such a purpose may be a known resin, and examples thereof include polyamides such as polyester, polyurethane and nylon. The step of providing the resin layer may follow a known method.

High-strength fibers are preferred as the fiber material constituting the fiber cloth according to the present invention. The high-strength fiber preferably has a tensile strength of about 13 cN / dtex or more, more preferably about 15 cN / dtex or more. A fiber having a breaking elongation of about 15% or less is also preferable as the high strength fiber. Specifically, as the high strength fiber,
For example, aramid fiber (also referred to as wholly aromatic polyamide fiber), carbon fiber, glass fiber, boron fiber, ceramic fiber, polyethylene fiber, polyketone fiber, polyparaphenylene benzobisoxazole fiber (hereinafter referred to as PBO fiber), wholly aromatic polyester fiber. , Nylon fiber, polyester fiber, polyimide fiber, polyvinyl alcohol fiber (hereinafter referred to as PVA fiber), and the like. The fibers constituting the fiber cloth according to the present invention are
The above fibers may be used alone or in combination of two or more.

The above high-strength fiber can be produced by a known method or a method similar thereto. Further, commercially available fibers can also be used. For example, as the para-aramid fiber, “Kevlar” manufactured by Toray-Dupont Co., Ltd. or “Technora” manufactured by Teijin Limited, and as the polyethylene fiber, “Dyneema” manufactured by Toyobo Co., Ltd., as a wholly aromatic polyester fiber. Includes "Vectran" manufactured by Kuraray Co., Ltd., "Zylon" manufactured by Toyobo Co., Ltd. as PBO fiber, and "Kuraron K-II" manufactured by Kuraray Co., Ltd. as PVA fiber.

The fiber cloth used in the present invention may be any one as long as it is a sheet-like cloth using the above-mentioned fiber material. For example, a fiber bundle; multiaxial such as triaxial cloth or tetraaxial cloth. Woven fabrics; plain woven fabrics, warp woven fabrics, entangled woven fabrics, and other woven fabrics; knitted fabrics; non-woven fabrics; The weight of the fiber cloth is appropriately determined depending on the application, for example, the size of the airship (gas volume), but is about 30 to 200.
It is preferably in the range of g / m ² .

The thermoplastic resin as an adhesive used in the composite film of the present invention is not particularly limited, but examples thereof include polyphenylene sulfide resin, polyester resin, polyurethane resin, polyamide resin, polyethylene resin,
Examples thereof include ethylene copolymer resins, polypropylene resins, poly-4-methyl-1 pentene resins, ethylene-vinyl alcohol copolymer resins, ionomer resins and the like. Here, the ethylene-based copolymer resin refers to a resin copolymerized using 1 to 4 kinds of comonomer components copolymerizable with ethylene, for example, a copolymer resin of ethylene and (meth) acrylic acid, Adhesive resin with adhesive function such as copolymer resin of ethylene and (meth) acrylic acid ester, copolymer resin of ethylene and maleic anhydride, copolymer resin of ethylene and epoxy compound Can be mentioned. The ionomer resin may be a resin obtained by partially or completely neutralizing an adhesive resin with a metal ion such as zinc or sodium. The adhesive resin may be a resin produced by a graft polymerization method, and examples thereof include those obtained by graft-polymerizing an acid anhydride such as maleic anhydride with a polyethylene resin or a polypropylene resin.

The thermoplastic resin used in the present invention may be a thermoplastic resin elastomer or a composition containing an elastomer. As an elastomer used as an adhesive in the composite film of the present invention, a polyester elastomer or a composition containing a polyester elastomer is preferable in terms of heat resistance. Polyurethane resin is preferable as the compound to be blended with the polyester elastomer in the composition, and the blending weight thereof is about 10 to 60.
It is preferably about wt%. The thermoplastic resin used in the present invention as described above can be easily produced by a known method, or a commercially available product may be used. For example, polyester elastomers include Toray DuPont Co., Ltd.
"Hytrel" manufactured by the company and the like can be mentioned.

The thermoplastic resin used in the present invention is a flame retardant, an inorganic or organic filler, an antioxidant, a heat stabilizer, an ultraviolet absorber, a lubricant, a wax, a coloring agent, to the extent that the object of the present invention is not impaired. It may contain an additive such as an agent or a crystallization accelerator. The additives may be used alone or in combination of two or more. Known additives may be used as the additive, and specifically, for example, carbon black, chalk, quartz, asbestos,
Feldspar, mica, talc, silicate, kaolin, silicon dioxide, alumina, silica, magnesia, talc, mica,
Fullerenes and the like can be mentioned. Of these, carbon black is preferably used.

The He gas low-permeable film of the present invention, a helium gas permeability, from about 600cc ^/ m ^2/24
It is preferably hr / 0.1 mm / atm or less.
The helium gas permeability referred to here is JIS K 640.
It can be measured according to 4-10 or in accordance therewith.
The helium gas permeability, from about 600cc ^/ m ^2/24
If it exceeds hr / 0.1 mm / atm, the helium gas is likely to leak from the composite film, so the above range is preferable. A more preferable range is about 100.
~200cc ^/ m is 2 /24Hr/0.1Mm/atm, if it has the properties of such a range, it is possible to raise the airship to the stratosphere, is more practical.

Examples of the He gas low-permeability film according to the present invention include aramid film, polyimide film, polyester film, nylon film, polyphenylene sulfide film, ethylene-vinyl alcohol copolymer film and fluorine film. More preferably, an aramid film, a polyimide film, an ethylene-vinyl alcohol copolymer film or a fluorine film is mentioned, and all of them have a good gas barrier property. Examples of these films include "Miktron" manufactured by Toray Industries, Inc. as an aramid film, "Eval" manufactured by Kuraray as an ethylene-vinyl alcohol copolymer film, and "Tedlar" manufactured by DuPont as a fluorine film. H
The thickness of the e gas low permeability film is preferably about 3.3 μm or more for producing a composite film.

The composite membrane obtained as described above preferably has the following physical properties. For example, the basis weight of the composite membrane of the present invention is preferably about 300 g / m ² or less, and about 280 g in terms of practical application as an airship.
/ M ² or less is more preferable. The basis weight of the composite membrane is preferably within the above range so that the weight of the composite membrane is reduced and the airship has sufficient buoyancy above the stratosphere. Further, the tensile strength of the composite film is preferably about 150 cN / cm or more. The tensile strength of the composite film here is J
It can be measured according to the IS K 6404-3 strip method or in accordance therewith. The tensile strength of the composite film is preferably within the above range so that the composite film will withstand the severe conditions of the stratosphere and will not be broken by the weight of the equipment mounted on the airship.

The thickness of the composite membrane according to the present invention is preferably about 20 mm or less, more preferably about 10 mm or less. When used for an airship, it is more preferable that the thickness is about 100 μm.

Thermoplastic resin used as an adhesive and H
The peel strength from the e-gas low-permeability film or the fiber cloth is preferably about 2.0 N / cm or more. The peel strength as referred to herein can be measured according to JIS K 6404-5 or in accordance with this, and refers to the minimum value of the measured peel strength.

The composite film obtained by the manufacturing method according to the present invention is preferably used as space / aviation equipment. For example, it is preferably used as an airship or an outer film of a balloon, or a container for storing gas such as helium.

[0035]

The present invention will be further described with reference to the following examples. However, it goes without saying that the present invention is not limited to this.

[Example 1] As a fiber cloth, a fineness of 220
Kevlar (manufactured by Toray-Dupont Co., Ltd.), which is a para-aramid fiber having a dtex of 61.8 g / m ² in basis weight, was a plain weave fabric. As a thermoplastic resin, a basis weight of 35.
8g / m ² Hytrel (Toray DuPont Co., Ltd.)
As a He gas low permeability film with a thickness of 12.5μ
mtron, an aramid film of m (Toray Industries, Inc.)
Manufactured) was used. In addition, Miktron was subjected to corona discharge treatment on the adhesive surface in order to enhance the adhesiveness with the thermoplastic resin.
Helium gas permeability of the above Miktron is 78 cc / m
Was ^{2 /24hr/0.1mm/atm.}

A composite membrane was manufactured using the manufacturing apparatus shown in the schematic view of FIG. Specifically, first, the extrusion device 2
Was charged with Hytrel and heated to 250 ° C. to be in a molten state. The molten Hytrel was continuously extruded in a thin film form from the extruder 2, and the extruded molten thin film (B ′) was sent to the press roll 5 and the cooling roll 6. Further, the Kevlar fabric was sent out from the sending roll 1 and passed through the corona discharge treatment device 4. In the corona discharge treatment device 4, 6.5
Corona discharge was performed under the condition of kW and preheating was performed. The surface temperature of the fabric at this time was 50 ° C. Then, the preheated Kevlar fabric was conveyed to the press roll 5 and the cooling roll 6. Further, Miktron (C) was fed to the press roll 5 and the cooling roll 6 from the opposite side of the Kevlar fabric, that is, the side opposite to the laminated surface of the Hytrel molten thin film (B ′) with the Kevlar fabric (A). . In this way, the molten thin film (B ') of Hytrel was sandwiched between the Kevlar woven fabric (A) and the Miktron (C), pressed by the press roll 5 and the cooling roll 6, and simultaneously cooled. At this time, the roll pressure was 4 kgf / cm ² and the linear pressure of the roll was about 22 kgf / cm. A silicon roll having a hardness of 80 degrees was used as the press roll 5, and a metal roll cooled to 15 ° C. was used as the cooling roll 6. The composite film (D) composited by the press roll 5 and the cooling roll 6 was finally wound up by the winding roll 7 to manufacture the composite film according to the present invention.

Example 2 A composite membrane according to the present invention was produced in the same manner as in Example 1, except that Hytrel was heated to 270 ° C. and melted in the extruder 2.

The composite membranes produced in Examples 1 and 2 were crease-free and of good quality. Further, the processing speed was as fast as 40 m / min, and the working efficiency was significantly better than that of the manufacturing method by the hot hot melt lamination method.

[0040]

EFFECT OF THE INVENTION The method for producing a composite membrane according to the present invention is an industrially excellent production method because it does not cause wrinkles and other defects and, as a result, defective products are less likely to occur. Further, according to the method for producing a composite membrane of the present invention,
The processing speed can be increased as compared with the manufacturing method using the hot hot melt lamination method, and the more efficient manufacturing of the composite film becomes possible. Furthermore, the composite film produced by the production method of the present invention has an advantage of high peel strength.

When the composite film is manufactured as described above, the thermoplastic resin does not penetrate deep into the fiber cloth. Therefore, for example, when carbon or the like is added to the thermoplastic resin as an additive, darkening or the like due to carbon entering into the fiber cloth does not occur, and the appearance of the fiber cloth can be kept beautiful.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a preferable apparatus for producing a composite membrane according to the present invention.

[Explanation of symbols]

1 Delivery roll of fiber cloth 2 Extruder 3 He gas low permeability fill delivery roll 4 Corona discharge treatment device 5 press rolls 6 cooling rolls 7 winding roll A fiber cloth B thermoplastic resin B'Melted thin film of thermoplastic resin C He gas low permeability film D composite membrane

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29L 9:00 B29L 9:00 22:00 22:00 (72) Inventor Iori Nakabayashi Oe, Otsu City, Shiga Prefecture 1-1-1 Toray Co., Ltd. Seta Factory F-term (reference) 4F207 AA04 AA05 AA19 AA24 AA27 AA29 AA30 AA31 AA40 AA45 AD08 AD16 AG01 AG03 AH32 AR06 KA01 KA17 KB20 KM15

Claims (11)

[Claims] 1. A thermoplastic resin having a decomposition point of 10 ° C. or higher
Than to produce a molten film melt-extruded into a thin film at a temperature below the temperature, the molten film fiber fabric and helium gas permeability 600cc ^/ m 2 /24hr/0.1mm/atm
A method for producing a composite film comprising a fiber cloth, a thermoplastic resin, and the film, which is sandwiched between the following films. 2. The method for producing a composite membrane according to claim 1, wherein the fiber cloth is preheated. 3. The method for producing a composite film according to claim 2, wherein the heating temperature is 30 to 500 ° C. 4. The method for producing a composite film according to claim 2, wherein the heating means is a corona discharge treatment. 5. The method for producing a composite membrane according to claim 1, wherein the processing speed is 10 to 400 m / min. 6. The method for producing a composite film according to claim 1, wherein the fiber cloth is selected from a fiber bundle, a woven fabric, a knitted fabric, a non-woven fabric, a net-like product, and a honeycomb-like product. 7. The material of the fiber cloth is aramid fiber, carbon fiber, glass fiber, boron fiber, ceramic fiber, polyethylene fiber, polyketone fiber, polyparaphenylene benzobisoxazole fiber, wholly aromatic polyester fiber, polyamide fiber, polyester. 4. One or more fibers selected from the group consisting of fibers, polyimide fibers and polyvinyl alcohol fibers.
7. The method for manufacturing the composite membrane according to any one of 6 to 6. 8. The method for producing a composite film according to claim 1, wherein the thermoplastic resin is polyphenylene sulfide, polyester, polyamide or polyurethane. 9. The method for producing a composite membrane according to claim 1, wherein the thermoplastic resin is a polyester elastomer or a composition containing a polyester elastomer. 10. The film according to claim 1, wherein the film is an aramid film, a polyimide film, a polyester film, a nylon film, a polyphenylene sulfide film, an ethylene-vinyl alcohol copolymer film or a fluorine film. Method for manufacturing composite membrane. 11. A composite membrane produced by the method according to claim 1.