WO2002040758A1 - Feuille composite contenant du fluor, permeable a l"air - Google Patents

Feuille composite contenant du fluor, permeable a l"air Download PDF

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Publication number
WO2002040758A1
WO2002040758A1 PCT/JP2001/009370 JP0109370W WO0240758A1 WO 2002040758 A1 WO2002040758 A1 WO 2002040758A1 JP 0109370 W JP0109370 W JP 0109370W WO 0240758 A1 WO0240758 A1 WO 0240758A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibers
composite sheet
web
fluororesin
heat
Prior art date
Application number
PCT/JP2001/009370
Other languages
English (en)
Japanese (ja)
Inventor
Katsutoshi Yamamoto
Jun Asano
Shinichi Chaen
Tomohisa Konishi
Original Assignee
Daikin Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries, Ltd. filed Critical Daikin Industries, Ltd.
Publication of WO2002040758A1 publication Critical patent/WO2002040758A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/026—Knitted fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0223—Vinyl resin fibres
    • B32B2262/0238—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption

Definitions

  • the present invention relates to a fluorine-based composite sheet having good air permeability and high colorable mechanical strength.
  • This composite sheet is useful as a sheet material for tents, formwork, and filters.
  • polytetrafluoroethylene is generally used for base cloth such as glass cloth.
  • Sheets obtained by applying, impregnating and melting fluororesin particles such as (PTFE) particles in the form of an aqueous dispersion are known.
  • this sheet material has a PTFE melt layer on both sides of the base fabric, the adhesive strength is not sufficient when bonding with other materials with an adhesive. There is also a problem that the holes (eyes) of the base fabric are crushed, resulting in poor air permeability.
  • a sheet material in which a PTFE film is stretched and made porous and laminated on a base fabric can be considered.However, since the strength of the porous PTFE film is low, use the PTFE film as the outermost layer. There is a problem that can not be.
  • Japanese Patent Application Laid-Open No. 9-3666675 describes that PTFE particle-containing fibers obtained by spinning an emulsion in which PTFE particles are dispersed in a matrix such as viscose are deposited on one or both sides of a glass base fabric by a wet papermaking method. This is heat-treated at a temperature at which the matrix is carbonized and the PTFE melts.
  • a composite paper-like composite sheet formed with a TFE paper-like layer has been proposed.
  • this composite sheet is a paper-like material, PTFE is particles or a melt thereof, and there is a problem in the strength of the PTFE paper-like material layer itself and the bonding strength with the base fabric.
  • An object of the present invention is to provide a fluorine-based composite sheet which has good air permeability and is free from coloring and has high mechanical strength. Disclosure of the invention
  • the present invention provides a composite sheet in which a heat-fusible web including a branched fluororesin stable fiber is bonded to a base fabric made of a woven or knitted fabric, wherein the web and the base fabric are combined.
  • the bond is a bond in which the fibers in the web are anchored and entangled with the base fabric, and the permeable fluorine-based composite formed by heat fusion of the fibers in the web entangled with the base fabric. About one point.
  • Such a composite sheet can achieve an air permeability of 1 second 100 ml-10000 seconds / 100 ml as measured by a Gurley meter for air permeability.
  • a fluororesin stable fiber having a branch to be heat-fused that is, a fluororesin staple fiber having a branch before heat fusion
  • a semi-fired PTFE stable fiber a fired or semi-fired vinyl fiber Staple fibers of ter-modified PTFE or staple fibers of ethylene-tetrafluoroethylene copolymer (ETFE) are preferred.
  • the heat-fusible web before heat fusion is made of a staple fiber of semi-fired PTFE, a staple fiber of vinyl ether modified PTFE, and a staple reflex of ETFE, as branched fluororesin stable fibers. It may contain at least two types of mixed fibers of the eye bar.
  • the heat-fusible web before heat-sealing may be composed only of a branched fluororesin staple fiber, or a fluororesin fiber other than the branched fluororesin staple fiber and a non-woven or non-fluororesin staple fiber. Fluororesin fibers may be included.
  • the fluororesin fibers and / or non-fluorine resin fibers other than the branched fluororesin staple fiber before heat fusion are heat-fusible resin fibers.
  • the entanglement of the heat fusible webs are entangled on one side of the base fabric, preferably 2 5 ⁇ 1 0 0 0 s / m is 5 0 to 5 0 0 g Roh m 2.
  • fibers constituting the base fabric glass fibers, carbon fibers, metal fibers, polyimide fibers, para-aramid fibers, methylaramid fibers, composite fibers obtained by compounding these, or mixed fibers thereof are preferable.
  • Such a composite sheet is obtained by bonding a heat-fusible web containing a branched fluorinated resin staple fiber to at least one surface of a woven or knitted base fabric by anchoring and entanglement with a mechanical force.
  • the fibers can be manufactured by heating to a temperature higher than the minimum melting temperature of the fibers contained in the web to thermally fuse the fibers in the web. This heating for heat fusion may be performed while pressurizing the web and the base fabric.
  • FIG. 1 is a schematic plan view of a wall member of a rearing tank used in Example 4 of the present invention.
  • FIG. 2 is a schematic perspective view of a breeding tank produced and used in Example 4 of the present invention.
  • a feature of the present invention is that a fluororesin fiber, which is originally difficult to bond firmly, is bonded to the base fabric while maintaining air permeability.
  • a heat-fusible web including a stable fiber having a branch that can be effectively entangled as a fluororesin fiber is used, and then the web is anchored and entangled with the base fabric by mechanical force. After the fibers are tightly entangled with the holes in the base fabric, the fibers are melted by heating (pressing if necessary) to further strengthen the bond with the base fabric.
  • branched fluororesin stable fibers and webs are described in WO 94/23098 pamphlet, WO 96/10668 pamphlet, WO 97Z26135 pamphlet, WO 96 00807 pamphlet, etc.
  • Branched fluoropolymer stable fibers and webs can be used.
  • the fluororesin include PTFE, beer ether-modified PTFE, ETFE and the like.
  • PTFE is preferably semi-baked because it is excellent in mutual heat fusion.
  • vinyl ether-modified PTFE and ETFE have a lower heat melting temperature than PTFE, the heat melting temperature after entanglement can be lowered, and a base fabric with a lower melting point can be used. Since the bonding strength with the base fabric is large, it is preferable that the strength and air permeability of the obtained composite sheet can be controlled by controlling the heating and melting conditions even with the same base fabric and the same amount of web.
  • the heat-fusible web may be composed of only one or a mixture of two or more of these fluororesin staple fibers, and may further have a heat-fusible non-fluorinated resin fiber or branch. Fluororesin fibers that are not used may be mixed. ratio When non-fluorinated resin fibers having a relatively low melting point are mixed, bonding by heat fusion can be performed with the non-fluorinated resin fibers, and the types of base fabrics can be further expanded. Of course, non-fluorinated resin fibers having a high melting point, or inorganic fibers such as metal fibers, carbon fibers, and glass fibers may be used.
  • non-fluorinated resins examples include polyolefins such as polyethylene and polypropylene as low-melting resins, and polyimide, para-aramide, meta-aramid, polyphenylene sulfide, phenolic resins, polyesters as high-melting-point resins. And so on.
  • the mixing amount of non-branched fluororesin fibers or non-fluorinated fibers is up to 95% by weight of the whole web.
  • a preferred heat-fusible web is one composed of only the branched fluororesin staple fiber.
  • PTFE branched fluororesin staple fiber
  • the branched fluororesin stable fiber is described in the above-mentioned W096Z1066.8 pan fret, WO9726139 panfleet, WO9660807 pamphlet and the like. It can be manufactured by the method described above. In other words, this method involves uniaxially stretching a fluororesin film, splitting the film in the stretching direction to form a network, and then cutting the mesh and cutting it to an appropriate length. .
  • the obtained staple fiber has very high entanglement because it has branches.
  • the desired stable fiber can be obtained by using a fluororesin pellet containing a pigment at the stage of preparing the raw fluororesin film, or by extruding a pigment together with a molding aid into an emulsion polymerization powder of PTFE.
  • Conventional pigments can be used.
  • These staple fibers or a mixture of staple fibers and other fibers are used to form a web using a carding machine or the like in a conventional manner.
  • the entanglement method is that the fibers in the web are entangled with the holes of the base fabric as a result of the entanglement, that is, it is important that the entanglement is performed by anchoring. It is. Therefore, as a confounding method, a war sunset jet method, a needle punch method, or the like is preferable.
  • the base fabric must have a through hole for anchoring the stable fiber. Therefore, woven or knitted fabrics are preferred.
  • the weaving method and the knitting method may be appropriately selected according to the purpose and use.
  • As the fiber of the base cloth a fiber that can withstand the heat-melting treatment described later and can provide a high-strength cloth is preferable. More specifically, inorganic fibers such as glass fibers, carbon fibers, and metal fibers, polyimide fibers, Synthetic resin fibers such as para-aramide fibers are preferred, but when low-melting fibers are added to the web or when the heat treatment time is short, metal-aramid fibers, polyphenylene sulfide fibers, phenol resin fibers, polyester fibers, etc. can also be used. .
  • the amount of entanglement of the heat-fusible web with the base cloth may be set according to the type of fiber of the web and the purpose and use of the composite sheet, but usually 25 to 100 g / m2 on one side. 2, preferably 5 0 ⁇ 5 0 0 g Zm 2.
  • the composite sheet of the present invention heats and presses the heat-fusible fibers in a state where the heat-fusible fibers (such as stable fibers) in the web are sufficiently entangled in the holes (eyes) of the base cloth, and entangles with the base cloth. Since some or all of the fibers are fused and bonded together as they are, a large bonding force is obtained. Therefore, it is desirable to perform the heating under such a condition that some or all of the fibers entangled in the base fabric are melted. Further, in order to suppress fluffing of the fibers, it is preferable that fusion between the fibers also occurs on the web surface.
  • two heated Examples include a method in which the web and the base cloth are sandwiched by a metal plate and pressurization is performed for a predetermined time, and a method in which an arbitrary distance is nipped by a pressure belt and a heating hole.
  • the heating temperature varies depending on the type and amount of fibers constituting the web, the type and thickness of the base fabric, etc., but when PTFE is used as the fluororesin, a temperature in the range of 330 to 400 Should be adopted.
  • the pressing force may be appropriately selected depending on the desired thickness, air permeability, etc., but may be selected in the range of 0.01 to 10 MPa a ⁇ G.
  • the heating time is usually from 10 seconds to 30 minutes.
  • the fibers in the web and the fibers and the base fabric can be strongly bonded to each other, and a composite sheet effectively utilizing the air permeability of the web base fabric can be obtained.
  • the thus obtained composite sheet according to the present invention has an air permeability (number of galleries) measured by Gurume Ichiichi (JISP 8117-198 0) of 1 to 1000 seconds Z 1 0 0 m 1, preferably from 1 to: have have a L 0 0 0 s / / 1 0 0 m 1 breathable. Therefore, it can be suitably used for various applications utilizing the air permeability.
  • the present invention also relates to a composite material produced by bonding a base fabric of such a composite sheet and a base material, and further to a structure produced from this composite material.
  • the composite sheet of the present invention can use a material having excellent adhesiveness (for example, meta-aramid, polyimide fiber, glass cloth, etc.) on the base fabric side. It is easy to use and can achieve high adhesive strength.
  • a material having excellent adhesiveness for example, meta-aramid, polyimide fiber, glass cloth, etc.
  • Substrates include various concrete molded products (walls, blocks, boxes, pipes, etc.); metals (iron, aluminum, copper, stainless steel, etc.) or parts; wood products; various plastic molded products; glass products. can give.
  • the substrate is preferably in the form of a mesh, a woven fabric or a knitted fabric, or a form in which the composite sheet of the present invention is adhered to a frame as a frame.
  • concrete form for pipes concrete form for tunnel construction
  • concrete form for high-rise buildings concrete form for high-rise buildings
  • underwater concrete formwork formwork for resin casting
  • formwork for FRP etc.
  • the air permeability can be controlled in the composite sheet of the present invention, appropriate air permeability can be given according to the use of various tents, and the above problem can be solved.
  • the base fabric can be bonded with an adhesive, so that the adhesive bonding with another material becomes easy.
  • the composite sheet of the present invention makes use of the water repellency characteristic of the fluororesin, and furthermore, it is possible to control the air permeability so that it can be brought into contact with only external air without passing water. Therefore, air can be supplied into the tank without using an air pump or with a reduced number of pump operations.
  • a belt that conveys processed products such as freshly cooked rice and rice cake is required to quickly release the water vapor and moisture released from the processed product to the outside of the belt to prevent condensation on the belt.
  • the composite sheet of the present invention has sufficient strength and water repellency and can control the air permeability, it is suitable as a material for such a conveyor belt.
  • Conveyor belts for various steamed products such as steamed confectionery and steamed food
  • the belt press type filtration device is a device that continuously performs filtration and drying by heating while pressing an object to be filtered between two belts having a filtering ability and pressing between the belts.
  • the excellent water repellency, air permeability, and releasability of the composite sheet of the present invention are optimal for this belt press type belt material.
  • An unsintered film was prepared from PTFE fine powder by a conventional method, and heat-treated in a salt bath heated to 337 for 45 seconds to obtain a semi-sintered film, and uniaxially stretched at 350 times to 25 times.
  • the uniaxially stretched film was defibrated by a needle blade roll at a rotation speed of 4500 rpm and a film feed speed of 1.5 mZ to produce a cotton-like PTFE staple fiber having branches and loops.
  • the fiber length of the obtained PTFE staple fiber was approximately between 1 and 100 mm, the specific surface area was 3.3 m 2 / g, and the average fiber diameter was 10 m.
  • a web having a basis weight of 250 g / m 2 was prepared from the obtained PTFE stable fiber cotton-like material.
  • a double-woven glass fiber woven fabric with a woven density of 48 inches in length and 48 inches in width is used as the base cloth, and the PTFE web is placed on the woven fabric. Below an entangled article of PTFE staple fiber and woven glass fiber was produced.
  • the arrangement of the discharge holes of the water jet nozzle is such that four rows of discharge holes with different hole diameters (discharge hole diameters are 150 mm, 130 rn, 120 zm and 100 ⁇ m in this order) are approximately lmm apart in the width direction.
  • the treatment was performed three times while changing the discharge pressure conditions of each row as follows. Discharge hole diameter ( ⁇ Pressure condition (kg f / cm 2 )
  • the entangled product of the obtained PTFE web and glass fiber woven fabric is sandwiched between two metal plates (effective heating area 20 OmmX 25 Omm) heated to 360 to prevent stains on the mold, and the surface pressure is 0.25MP. a ( 2.5 kgf / cm 2 ) for 10 minutes to produce a composite sheet of the present invention.
  • results were 1000 mm ⁇ 200 mm for the composite sheet of the present invention, but 200 mm and 50 mm for the sheet before heat pressing.
  • the composite sheet of the present invention showed almost no fluff.
  • the composite sheet of the present invention prepared in Example 1 was used as a sample A, the sheet before heat pressing prepared in Example 1 was used as a sample B, and a fired PTFE sheet (substantially having no holes) was used as a sample C. A moldability test was performed. (Release test)
  • Urethane-based adhesive (Pand 156 A manufactured by Three Bond Co., Ltd. Solvent: 45-55% of methyl ethyl ketone, 10-20% of toluene, 10-20% of ethyl acetate) is applied to a 100-zzm-thick polyester film. Then, the adhesive-coated surface is brought into close contact with the PTFE surface of each sample, allowed to stand at room temperature for 24 hours, and then the polyester film and the sample are peeled by hand, and the adhesion and the state of the adhesive are visually observed.
  • Sample A was easily peeled from the polyester film, and the adhesive was firmly adhered to the polyester film.
  • Sample B Adhesive firmly penetrates into Sample B web layer and backing However, it was firmly fixed to the polyester film and could not be peeled off.
  • Sample C Sample C was separated from the polyester film, but the adhesive was not cured and remained viscous.
  • the releasability of the composite sheet of the present invention is greatly improved only by performing the heat and pressure treatment. This is because the curing of the adhesive requires a rapid release of the solvent to the outside. Therefore, the composite sheet of the present invention is useful as a mold for casting resin.
  • Sample A composite sheet of the present invention
  • Sample B sheet before heat pressing
  • quick-drying cement containing a curing accelerator
  • sample A of the present invention As a result, in the sample A of the present invention, the cement easily separated, the cement did not adhere to the surface of the sample A, and no change was observed on the sample surface. On the other hand, Sample B required some force to separate, and the fibers of the Sample B web layer adhered to the cement surface after separation.
  • the composite sheet of the present invention is useful as a concrete formwork.
  • a composite sheet 1 of the present invention prepared in Example 1 having a square shape of 20 cm square was bonded to a frame 2 (square having an outer shape of 20 cm) made of a vinyl chloride resin shown in FIG. 1 with an epoxy resin adhesive.
  • Five wall members 3 were produced, and a box 4 was produced using the wall members 3 as shown in FIG. The corner of this box 4 is made of silicone
  • the tank was filled with 5 liters of water, bred with 5 goldfish of about 5 g and kept without an air pump. Even after 1 month, all 5 fish survived without sticking their nose to the surface of the water.
  • the present invention it is possible to provide a fluororesin-based composite sheet having good air permeability, high strength, excellent release properties and weather resistance, and easy coloring, and a composite material using the same. it can.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L"invention concerne une feuille composite perméable à l"air, constituée d"un textile de base tissé ou tricoté, combiné à une bande thermofusible constituée de fibres courtes d"une fluororésine ramifiée. La combinaison de la base et de la bande s"effectue par la thermofusion entre les fibres de la bande enchevêtrées avec le textile de base et/ou entre une fibre de la bande et l"étoffe de base. La feuille composite présente une bonne perméabilité à l"air et une résistance élevée, une bonne aptitude à la séparation, une résistance aux intempéries excellente, se colore facilement, et peut être utilisée comme matériau de tente, d"ossature et similaire.
PCT/JP2001/009370 2000-11-14 2001-10-25 Feuille composite contenant du fluor, permeable a l"air WO2002040758A1 (fr)

Applications Claiming Priority (2)

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JP2000346310A JP2002155457A (ja) 2000-11-14 2000-11-14 通気性を有するフッ素系複合シート
JP2000-346310 2000-11-14

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WO2002040758A1 true WO2002040758A1 (fr) 2002-05-23

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WO (1) WO2002040758A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004059059A1 (fr) * 2002-12-26 2004-07-15 Daikin Industries, Ltd. Voile poreux, procede de production d'un voile poreux et filtre a air comprenant ce voile poreux

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4696442B2 (ja) * 2003-08-20 2011-06-08 三菱マテリアル株式会社 複合多孔質体
JP7392318B2 (ja) * 2019-08-08 2023-12-06 東レ株式会社 フッ素系繊維から成る抄紙

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US4569088A (en) * 1983-10-03 1986-02-11 E. I. Du Pont De Nemours And Company Foundry workers' protective garment
JPS61282463A (ja) * 1985-06-03 1986-12-12 グンゼ株式会社 不織布
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JPH0957028A (ja) * 1995-08-23 1997-03-04 Toray Ind Inc バグフィルター用フェルト地及びその製造方法
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JP2000325713A (ja) * 1999-05-19 2000-11-28 Toyobo Co Ltd ダスト剥離性に優れるバグフィルター用フェルト

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