JPS59165653A - Flexible laminate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluorocarbon resin laminate having excellent bending resistance. More specifically, the present invention relates to a flexible laminate having excellent bending resistance, flexibility, weather resistance, oil resistance, stain resistance, and durability. The present invention relates to a laminate comprising a specially structured woven fabric base fabric, a polyurethane layer, and a fluororesin layer, which has excellent electrical resistance against bending especially in cold weather.

Technical Background Conventionally, flexible laminated sheets consisting of a fiber base fabric, especially a plain weave base fabric, coated with a polyurethane resin layer on one or both sides have been used as oil-resistant aprons and the like due to their versatility, oil resistance, economic efficiency, and other aspects. It is used for targillin etc.

Although this sheet essentially has the advantages of polyurethane resin, such as processability, economy, and oil resistance, on the other hand, during long-term use, sufficient consideration must be given to stabilizers, etc. However, the resin gradually decomposes, causing discoloration from the surface layer, and furthermore, a lot of dust adheres to the surface, resulting in severe contamination.It also has serious drawbacks in terms of weather resistance, stain resistance, etc. Met.

As a countermeasure to the above-mentioned drawbacks of conventional laminated sheets, the present applicant discovered that a fluorine-based resin film layer could be formed on the polyurethane layer to improve the elasticity, and the present applicant proposed Utility Model Application No. 57-29384. The application was filed as However, even in such a laminate, if it is rubbed very strongly during use, cracks will occur in the thin resin film layer, and if this is further expanded, cracks will also occur in the underlying polyurethane layer. It has been found that this phenomenon is particularly noticeable in cold weather, and therefore has drawbacks such as significantly shortening the service life of the laminate.

In view of the above circumstances, the present invention was made in order to eliminate the drawbacks of conventional laminated sheets.
We investigated ways to prevent cracks in the surface layer by dispersing the stress applied to the resin layer, especially the surface layer made of fluorine-based resin, due to bending, etc., and found that due to the requirements for such applications, Knitted fabrics that have a large degree of expansion and contraction under load are unsuitable, and plain woven fabrics that have a low degree of expansion and contraction under load are advantageous, but when such fabrics are made into a laminate as described above, the fluororesin layer is It was discovered that the stress caused by the base fabric becomes large, and therefore cracks due to the base fabric are likely to occur, and by solving such disadvantages, the present invention was completed.

Purpose of the Invention The purpose of the present invention is to provide a flexible fluororesin laminate that has excellent bending resistance, especially in cold weather, and also has excellent flexibility, weather resistance, and stain resistance. be.

Summary of the Invention According to the present invention, a fluororesin laminate with excellent bending resistance is provided, and this laminate includes a warp layer consisting of a large number of warps arranged parallel to each other, and A surface of a base fabric of a special structure fabric consisting of a weft layer consisting of a large number of weft yarns arranged in parallel to each other so as to intersect with each other, and a leno yarn that entangles and connects the warp yarns and weft yarns at their intersections, or A sufficiently thick layer of polyurethane resin is formed on the outer surface, and a thin fluorine-based resin film layer is formed at least on the upper surface of the surface layer.

The present invention further provides a warp layer consisting of a large number of warps arranged in parallel to each other, a weft layer consisting of a large number of wefts arranged in parallel to each other so as to be perpendicular to the warps, and the warp and weft. , a base fabric of a special structure fabric consisting of leno threads entangled and bonded at their intersections, an intermediate layer formed on at least one side of the base fabric and consisting of a polyurethane resin, and a base fabric formed on the intermediate layer, and , and a blush layer made of a fluorine-based resin, the thickness of the surface layer is within the range of 1 to 50 microns, and a large number of convex portions and concave portions are formed on the surface of the surface layer. and the highest point of each convex part,
To provide a resin laminate characterized in that the difference in height between the lowest point of each concave portion adjacent thereto is 5 microns or more.

The laminate of the present invention comprises a specially structured woven base fabric, an intermediate layer made of a polyurethane resin formed on at least one surface thereof, and a fluorine-based resin laminate formed on the intermediate layer. The special structure fabric base fabric used for this purpose is made of natural fibers such as cotton and linen, inorganic fibers such as glass fiber, recycled fibers such as viscose rayon, cupro, etc., semi-synthetic fibers such as gee and At least one type selected from triacetate fibers, etc., and synthetic fibers such as nylon 6, nylon 66, polyester (polyethylene terephthalate, etc.) fibers, aromatic polyamide fibers, acrylic fibers, polyvinyl chloride fibers, and polyolefin fibers. It consists of The fibers in the base fabric may be in any form such as short fiber spun yarn, long fiber yarn, split yarn, or tape yarn. These are arranged in parallel to each other, and the warp and weft layers thus formed are laminated so as to intersect each other, and are loosely connected by long leno threads at the intersection points of the warp and warp threads.

The leno yarn is selected from polyester, nylon, aromatic polyamide and other known synthetic fibers, glass fiber, steel fiber and other known non-ia rutted fibers, and polyester filament yarn is particularly preferred.

Now, for example, as warp and warp yarns, the tensile strength of single yarn is 1.3k.
When vinylon 108/1 spun yarn of g is used,
Aromatic polyamide filament yarn with a tensile strength of 20 g per unit denier is used as the leno yarn, and if yarns of the same material are used in consideration of ease of fabrication, for example, the unit denier is Polyester filament yarn with denier and tensile strength of 8g,
109 polyester filament yarn is used as the leno thread.

A particularly preferable structure of the special structure fabric for use in the present invention is as described in Japanese Patent Publication No. 30381/1989 filed by the present applicant, including a warp layer consisting of a large number of warp threads arranged in parallel to each other; It consists of a weft layer consisting of a large number of weft yarns arranged parallel to each other so as to be perpendicular to the warp yarns, and a leno yarn that entangles and connects the warp yarns and weft yarns at their intersections. The leno threads are longer than the warp and weft threads, and therefore,
The warp and weft are loosely connected, and at least one of their tensile strength, tensile elongation, and breaking work (7)
It is preferable that the adhesive force to the resin material is larger than that of the warp and weft, and/or that the adhesive force to the resin material is smaller than that of the warp and weft. As the leno yarn, yarns having the characteristics shown below are particularly preferred. That is, (i) leno yarn in which the strength of the warp and weft yarns constituting the base fabric is 10 cm or more per unit denier.

(11) A leno yarn with a breaking work of 10% or more for the warp and weft yarns constituting the base fabric.

(iii) A leno yarn whose elongation at break is 5 inches or more greater than the warp and weft yarns constituting the base fabric.

(Iv) A leno yarn that has a lower adhesion force to the resin coating than the warp and weft yarns constituting the base fabric.

Among these, leno yarns whose tenacity per unit denier is 10% or more higher than that of the warp and weft are preferably 20 to 20%.
The purpose is to prevent the progress of tearing that occurs in the warp and weft by using large leno threads that are 10% or more stronger (8). longer,
Therefore, since the free fibers are more variable and deformable than the warp and warp yarns, they can flexibly deal with and absorb tearing forces that continuously act on the sheet.

In other words, even if a tearing force acts on the sheet, causing the warp and warp threads to displace and eventually break, the leno threads follow the tearing force, displace and deform without being cut, and eventually absorb the tearing energy and stop tearing. can be done.

Next, as the leno yarn, a yarn whose breaking work in the warp and weft is preferably 10 or more, more preferably 20 to 30% higher can be used. The breaking work here is a value approximately expressed by the product of the strength at the time of cutting the yarn and the elongation at the time of cutting.

Breaking work - tensile strength at break x tensile elongation at break For example, for warp and warp threads, the tensile strength at break is s, which corresponds to the unit denier.
A polyester filament yarn having o,y and a tensile elongation at break of 13% is used, and as the leno yarn, a polyamide fiber yarn having a unit denier of 5'y,og and a tensile elongation at break of 18% is used.

At this time, the breaking size sit of the leno thread is approximately 21% larger than that of the warp and warp threads. Furthermore, in consideration of ease of processing, it is desirable to use threads made of the same material.

Furthermore, a leno yarn having a weft/warp/warp/warp elongation at break of preferably 5% or more can also be used for the braided connection. When polyester filament yarn is used, the breaking elongation of the warp and warp yarns is preferably 15% or less, particularly 8 to 12%, while the breaking elongation of the leno yarn is 15% or more, particularly 20 inches or more, and there is a gap between the two. A difference of at least 5 inches or more gives good results. When the leno thread is a synthetic fiber, the degree of polymerization of the polymer material is adjusted at the time of manufacture to maintain a desired strength and a desired high elongation at break; It is possible to obtain a filament with a lower drawing ratio, for example, an undrawn yarn or a leno yarn having a desired elongation at break when crimped during secondary processing.

Furthermore, it is also possible to use leno yarns that have a small adhesive strength to the weft, weft, and coating resin materials.

In this case, the leno thread may have its surface subjected to silicon processing or the like. In this case, the warp and warp threads are
Due to adhesion with the coating resin material, the degree of freedom of displacement and deformation is reduced, but the degree of freedom of the leno yarn and the warp and warp threads are large, so when tearing force is applied to the base fabric, the leno yarn It can slip and be displaced and deformed, thus preventing the base fabric from tearing.

In order to reduce the adhesive force, the surface of the leno yarn should be subjected to non-adhesive treatment such as silicone treatment or oil treatment, or it should be treated with yarns that are inherently small in adhesive properties, such as polyethylene yarn and polypropylene yarn. You can use

As described above, in the base fabric according to the present invention, it is preferable that the leno yarns for connecting the warp and warp yarns arranged in parallel in the warp and weft directions have substantially the warp and warp weft length<, Is the yarn long enough that at least a part of it will not break even if the warp and warp yarns are cut or displaced and are in a state of tension? Is the yarn strong enough, has a sufficient amount of work to break, and/or has a good elongation at break? The tensile force is maintained by the warp and warp threads, and the leno threads are used to counter the impact force at the time of tearing, or to reduce the tear energy. Furthermore, by absorbing the leno yarns and remaining without cutting them, delamination between the resin coating and the sheet due to tearing can be prevented.

Regarding the special structure fabric according to the present invention, please refer to Utility Model Publication No. 52-50234 (Utility Model Application Publication No. 50-1668) related to the applicant's earlier application.
, Japanese Patent Publication No. 57-30381 (Japanese Patent Publication No. 55-67446)
No.), Special Publication No. 55-24415 (% Kai No. 54-139
Fabrics described in JP-A-55-134242, JP-A-56-159165, JP-A-57-14031, and JP-A-57-14032 can be suitably used. These textiles typically have a structure as shown in FIG. In the figure, 1 is a warp, 2 is a weft, and 3 is a leno thread.

That is, it is useful for maintaining the mechanical strength of the base fabric used in the present invention and the resulting laminate at a high level.

In the laminate of the present invention, one or both sides of the special structure fabric base fabric is coated with an intermediate layer made of polyurethane resin.

The shape of the polyurethane resin used in the present invention can be freely selected, and plasticizers, stabilizers, colorants, lubricants, and various other tactile agents can be freely added within known ranges.

An example of a polyurethane resin, particularly a thermoplastic polyurethane distomer resin, will be shown below.

As the polyurethane elastomer, one obtained by reacting an organic polyinsyanate with a polymeric polyol and, if necessary, a chain extender is used.

Organic polyesocyanates include aliphatic, cycloaliphatic or aromatic polyisocyanates, such as hexamethylene diisocyanate, lyson diisocyanate, cyclohexylene diisocyanate, dicyclohexylmethane diisocyanate, inphorone diisocyanate, tolylene diisocyanate, xylylene diisocyanate,
Examples include phenylene diisocyanate, diphenylmethane diisocyanate (MDI), biphenylene diisocyanate, and naphthylene diisocyanate. MDI or an organic diisocyanate mainly composed of MDI is preferred.

Polyether polyols include polyether polyols,
Mention may be made of polyester polyols, polyether ester polyols, polymer polyols and mixtures of two or more thereof.

As polyether polyols, alkylene oxides (ethylene oxide, zolopylene oxide, butylene oxide, etc.), heterocyclic ethers (tetrahydrofuran, etc.) are polymerized, and fc is copolymerized (block or random).
For example, polyethylene glycol, polyethylene glycol, polyethylene-propylene (block or random) glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol, polyoctamethylene ether glycol, and mixtures of two or more thereof. Can be mentioned. Polyester polyols include dicarboxylic acids (adipic acid, succinic acid, sebacic acid, daltaric acid, maleic acid, fumaric acid, 1 liter of phthalate) and glycols (ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexane). Diol, 1,8-octamethylene diol, neopentyl glycol, bishydroxymethylcyclohexane, bishydroxyethylbenzene,
(alkyl dialkanolamine, etc.), such as polyethylene azide, polybutylene assortate, polyhexamethylene adipate, polyethylene/propylene adipate: polylactone diol, e.g. polycarrolactone diol : and mixtures of two or more of these. As the polyether ester polyol, ether group-containing diols (the above-mentioned polyether diols, diethylene glycol, triethylene glycol, dipropylene glycol, etc.) or mixtures of these and other glycols are combined with the above-mentioned dicarboxylic acids or dicarboxylic acid anhydrides (phthalic anhydride, etc.). acid, maleic anhydride, etc.) and alkylene oxide, such as poly(polytetramethylene ether) adipate.

In addition, as a polymer polyol, a polymer polyol (
Examples include those obtained by polymerizing ethylenically unsaturated monomers (acrylonitrile, styrene, etc.) in the above-mentioned polyether polyols, polyester polyols, and/or polyether ester polyols] or mixtures of these and medium- to low-molecular-weight diols. .

Average molecular weight of polymer polyol (by hydroxyl value titration)
is usually 500 to 5000, preferably 700 to 4000
, particularly preferably ij: 2000 to 350o.

Examples of chain extenders include low-molecular polyols with a molecular weight of less than 500, such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol, triethylene glycol, thiodiglycol (thiodiethanol, etc.). ): polyamines, for example aliphatic diamines such as ethylene diamine, globylene diamine, butylene diamine, hexamethylene diamine, alicyclic diamines such as piperazine, 1,4-diaminopiperazine, 1,3-cyclohexylene diamine, dicyclohexylmethanesoamine, etc. Aromatic polyamines such as diphenylmethanethoamine, tolylenediamine, phenylenediamine, aromatic-aliphatic polyamines such as xylylenediamine, hydrazine and monoalkylhydrazine: alkanolamines, such as ethanolamine, propatoolamine: and these 2
Examples include mixtures of more than one ridge. Preferred are low molecular weight diols (especially ethylene glycol).

However, any other thermoplastic polyurethane resin can be used without being limited to the above examples. This intermediate layer has a thickness sufficient to give the laminate the desired oiliness, waterproofness, and mechanical strength, for example, 0.05 to 1.05 mm or more, preferably 0.05 to 1.00 mm. (It has a thickness of 1 m.

The polyurethane resin formed next on the optical surface or front and back surfaces of the base fabric is not only used as an adhesive, but also has a sufficient thickness, e.g., 0.05 to 1 It is necessary that the thickness be 0.03 mm. It may be thicker if it is financially acceptable. Formation of the polyurethane resin layer may be performed by topping, calendering, coating, or other methods. When using the polyurethane resin, the shape of the resin can be freely selected, and it goes without saying that plasticizers, stabilizers, colorants, lubricants, and various other tactile agents can be freely added to the resin within known ranges. The polyurethane resin may contain air bubbles.

Furthermore, depending on the application, the base fabric and the polyurethane resin intermediate layer may each be composed of a plurality of pieces.

A fluorine-based resin film surface layer is formed on at least one of the intermediate layers. Next, this fluorine-based resin film, which is the most important feature of the present invention, will be explained.

In general, fluorine-based resins are nonflammable and have excellent chemical resistance, so they are used in mechanical parts such as mating sheets, tubes, and sheets, as well as electrical equipment parts and linings. However, this resin has a high degree of crystallinity and is not compatible with ordinary plastic adhesives, so it is extremely difficult to adhere it to the surface of a synthetic resin as it is.

In the present invention, a fluorine-based resin film is subjected to a surface corona discharge treatment or the like to activate the surface as rough as possible, thereby producing a resin adhesive such as vinyl chloride, epoxy, acrylic, polyester, etc., or a mixture of these resins. It may also increase compatibility with adhesives. Usually, the above-mentioned treatment results in roughening of the surface portion of the fluororesin film having a thickness of 2 to 10 microns. For this purpose, DC 100~200V140~100μF1 Short circuit current 1~
Discharge treatment is performed under the condition of 2A. Through such discharge treatment, the fluororesin film can obtain the desired adhesive ability, but
The surface treatment of the fluororesin film used in the present invention is not limited to this, but any other surface treatment may be used as long as it produces an effect equal to or greater than that.

The fluorine-based resins constituting the fluorine-based resin film include various I-refluoroethylenes synthesized from monomers in which one or more hydrogen atoms of ethylene are replaced with fluorine atoms, such as:
There are polytetrafluoroethylene and various polyfluorochloroethylenes containing a portion of chlorine, such as polytrifluorochloroethylene, but also polyvinyl fluoride, polyvinyritine fluoride, polydichlorodifluoroethylene, Others are also included. All of these fluorine-based resins have high melting points, so normal calendar processing cannot be performed, so they are generally melted and then extruded, or powdered resin is heated under pressure and molded into a sheet. However, there are no particular limitations on the film forming method. The thickness of the fluororesin film layer is preferably 50 μm or less, but it may be thicker than the above or It can be made thinner.

In the present invention, a fluorine-based resin in the form of a film with a substantially smooth surface may be adhered to the upper surface of the polyurethane resin layer, but it is also possible to apply a fluorine-based resin solution, e.g., an emulsion, a solution, etc. Another method is to apply it. With this method, the paint film is thin and it is difficult to apply the thickness uniformly, which often results in uneven coating, and some areas are left uncoated, making it impossible to expect a complete effect and causing stains. It also adheres easily. Furthermore, since the strength of the coating film is low, during use, the fluororesin film is partially damaged due to scratching, etc., which poses a problem in terms of durability. The film strength of the fluororesin film according to the present invention is usually preferably 100 k17/J or more.

The fluorine-based resin surface layer is coated with at least one layer by a conventionally known method.
formed on two intermediate layers. The important features of the present invention include the use of a specially structured woven base fabric as described above and the formation of a fluororesin film layer on the upper surface of the preurethane resin layer.

The fluororesin film layer also imparts weather resistance and stain resistance to the laminate. In particular, it prevents the plasticizer contained in the polyurethane resin layer from bleeding, and does not cause surface decomposition products of the layer or surface tackiness due to the bleeding. The fluororesin film may also be produced by the T-die method, the inflation method, or any other method. Further, it may be either stretched or unstretched. Usually, the thickness is about 3μ to 50μ.

As mentioned above, such a film can be attached using an adhesive, but it can be attached to the surface of a polyurethane resin layer whose surface has been melted by heating. You can also attach it.

FIG. 2 shows a specific example of the laminate according to the present invention, in which polyurethane resin layers 5 and 5' are formed on both sides of the base fabric 4. A fluororesin film layer 6 is provided on the upper surface. There is no problem in omitting the polyurethane resin layer 51 on the back surface or providing the fluorine-based resin film layer 6 also on the back surface resin 95'. The laminate thus obtained exhibits less cracking in cold weather than laminates made from conventional textiles, such as plain weave fabrics. In other words, for conventional products, the standard operating conditions are approximately 5 to -5 degrees Celsius, but
The product of the present invention can be used even at -20°C to -25°C. Furthermore, depending on the case, it can be used even at lower temperatures.

This seems to be due to the fact that in the product of the present invention, the directionality of bending due to the base fabric structure is not particularly limited and can be bent in all directions, and is flexible. Also, Scott type bending test) (JIS-K-6328-1981,
5, 3, 8, and the massaging test), the number of cracks was approximately 5 to 10 times greater, which is a favorable result. In particular, it is preferable for the fluorine-based resin film to be thin for practical purposes, and the fact that this effect is remarkable in the range of 5 to 20 microns is an epoch-making effect compared to conventional products.

As a result, it is thought that one of the reasons for the good results is that the laminate does not become harder than necessary even when a fluororesin film is applied.

More preferably, in the laminate of the present invention, the fluororesin surface layer has a thickness within the range of 1 to 50 microns, and has a large number of convex portions and concave portions formed on the surface, each of which has a thickness of 1 to 50 microns. The height difference between the highest point of the convex portion and the lowest point of each concave portion adjacent thereto is 5 microns or more, preferably 7 microns or more.

If the thickness of the surface layer is less than 1 micron, the drawbacks of the urethane resin intermediate layer cannot be sufficiently overcome, and if the thickness of the surface layer is greater than 50 microns, the flexibility of the resulting laminate will decrease. and flexibility becomes unsatisfactory. Also, the height difference between the highest point of the convex part and the lowest point of the concave part is 5
When the thickness becomes smaller than microns, the effect of improving flexibility by forming unevenness becomes unsatisfactory.

There are no particular limitations on the shapes and dimensions of the concave portions and convex portions formed in the surface layer as long as the objective of the present invention can be achieved.
100 to 1,000,0 per m of horizontal surface area of the surface layer
It is desirable that 00 convex portions are formed. To form a fluorine-based resin surface layer with a polyurethane resin intermediate layer, first prepare a fluorine-based resin film having a desired uniform thickness, and then smooth it. The fluorine-based resin film is placed on a flat stand or roll with a smooth peripheral surface, and then pressed with a shaping plate or a shaping roll engraved with an uneven pattern of a predetermined shape and size to create the desired unevenness on one side of the fluorine-based resin film. Form. Of course, the uneven pattern may be formed on both sides of the film.

The fluororesin film prepared as described above and having irregularities on at least one side may be adhered onto the polyurethane resin intermediate layer using an adhesive, or the surface portion of the intermediate layer may be This may be heated to 140° C. to 200° C. to melt it, and then a fluororesin film may be pressed and adhered thereon. Alternatively, a fluorine-based resin film may be adhered onto the intermediate layer by the method described above, and the surface layer of the fluorine-based resin of the resulting laminate may be shaped to have concavities and convexities similar to those described above.

The unevenness formed on the shaped surface (peripheral surface) may correspond to the uneven pattern to be imparted to the fluororesin surface layer,
Alternatively, when forming irregularities, the fluorine-based resin surface layer is heated to a temperature within the range of 30°C higher than the glass transition point (Tg) of the fluorine-based resin to 10°C lower than its melting point (Tm). It is preferable. For this purpose, the fluororesin film (or surface layer) may be heated to a desired temperature in advance and subjected to the shaping process, or the film and/or the shaping plate (roll) may be heated to a desired temperature. It's okay.

The preferred laminate of the invention shown in FIGS. 3 and 4, like the laminate of FIG. However, a large number of fine irregularities are formed on the surface of the fluororesin surface layer 6 formed on the intermediate layer 5.

In the laminate of the present invention shown in FIGS. 3 and 4, the surface layer 6 is formed only on the intermediate layer 5, but other surface layers are formed on the intermediate layer 5'. Good too.

The bonding surface between the intermediate layer and the surface layer may be smooth as shown in FIG. 3, or may be uneven as shown in FIG. 4.

In the latter case, the adhesive strength of both layers increases.

Moreover, a part of the polyurethane resin may penetrate into the base fabric. In this case, the adhesive strength between the base fabric and the intermediate layer increases. The thus obtained laminate also has excellent flex cracking resistance and stability in use at low temperatures, and is approximately 15 degrees Celsius higher than the laminate according to the first invention described above.
The bending performance is also improved by about 10 to 20%.

Effects of the Invention In the laminate of the present invention, the fluororesin surface layer covers the specially structured woven fabric base fabric and the polyurethane resin intermediate layer to improve the weather resistance of the laminate, and the fluororesin surface layer covers the laminate surface from the polyurethane resin intermediate layer. Not only does this prevent the plasticizer from bleeding into the fluorine resin surface layer, thereby improving the stain resistance of the laminate, but also, in particular, in the second invention, the large number of minute irregularities formed on the surface of the fluororesin surface layer It is possible to further improve the bending resistance of the laminate and prevent the occurrence of cracks in the surface layer.

Therefore, the laminate of the present invention can be used for a long period of time without surface cracking or staining.

Since the present invention is based on the above-described structure, the present invention does not impair the advantages of conventional polyurethane sheets, and furthermore, a polyurethane resin is formed on a base fabric, and a fluorine-based resin film is further formed on the top surface of the base fabric. In this case, a laminate with significantly superior flexibility, durability and strength will be constructed. The laminate of the present invention can be used for tents, canopies, sheets, flexible containers, wide belts, food conveyance belts, aprons, cloaks,
It has a particularly remarkable effect when used for leather, oil fences, and other industrial materials. In particular, the hood is subject to severe bending under strong winds.

This effect can be significantly exhibited in sheets, belts, etc. that are subjected to a large amount of refraction.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the base fabric useful in the present invention, and FIGS. 2, 3, and 4 are cross-sectional explanatory diagrams of one embodiment of the laminate of the present invention, respectively. . 1... Warp, 2... Weft, 3... Leno thread, 4...
...Base fabric, 5.5'...Polyurethane intermediate layer, 6...
・Fluorine resin surface layer. Patent applicant: Hiraoka Orisen Co., Ltd. Patent agent: Akira Aoki Patent attorney: Kazuyuki Nishidate Patent attorney: Yoshi 1) Takeo: Patent attorney: Akira Yamaguchi Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A warp layer consisting of a large number of warps arranged in parallel to each other, a weft layer consisting of a large number of wefts arranged in parallel to each other so as to be perpendicular to the warps, and the warp and weft. and,
A sufficiently thick layer of polyurethane resin on the surface or front and back surfaces of a specially structured woven base fabric consisting of leno threads that are entangled and bonded at their intersections, and at least on the surface of the polyurethane resin layer formed on the surface side. A flexible laminate having a fluorine-based resin film layer. 2. The laminate according to claim 1, wherein the thickness of the 2° fluorine resin film layer is 50 microns or less. 3. The laminate according to claim 1, wherein the fluorine resin film is a fluorine resin film made of polytetrafluoroethylene. 4. A warp layer consisting of a large number of warps arranged in parallel to each other, a weft layer consisting of a large number of wefts arranged in parallel to each other so as to be perpendicular to the warps, and the warps and wefts,
A specially structured woven fabric base fabric consisting of leno threads entangled and bonded at their intersections; an intermediate layer formed on at least one surface of the base fabric and made of polyurethane resin; a surface layer made of a resin, the thickness of the surface layer being within the range of 1 to 50 microns,
and that a large number of convex portions and concave portions are formed on the surface of the surface layer, and the height difference between the highest point of each convex portion and the lowest point of each concave portion adjacent thereto is 5 microns or more. Features: Flexible laminate. 5. The laminate according to claim 4, wherein the surface layer has 100 to 1.000.000 convex portions per horizontal area m of the surface of the surface layer.