JPH0572869B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to highly transparent textiles suitable for making various covers, packaging materials, and clothing that require flexibility. (Prior technology) PVC and polyolefin films have traditionally been used mainly for covers, packaging materials, and clothing that require flexibility and transparency, but while these are highly transparent, they have low strength and In order to have dimensional stability, it had to be thick, making it heavy and having a rough and hard texture. Furthermore, these films have low thermal stability and low dimensional stability, which limits the way they can be used. On the other hand, when trying to obtain highly transparent woven or knitted fabrics, they result in coarse structures that are unsuitable as packaging materials, and are too breathable to be used as clothing, making them difficult to use in ball gowns and wedding dresses. It could only be used for very special things. (Problems to be Solved by the Invention) In view of the above points, the present invention is suitable for producing various covers, packaging materials, clothing, etc. that are highly flexible, lightweight, strong, dimensionally stable, and highly transparent. The purpose is to provide suitable textiles. (Means for Solving the Problems) The present invention is characterized in that a transparent film made of a polymer is attached to at least one side of a fabric woven using a transparent filament yarn made of a polymer and having an aspect ratio of 2 or more. It is something that has been done. Possible polymers constituting the filament in the present invention include polyamide polymers and polyester polymers, but considering the ease of obtaining transparency and strength and dimensional stability, nylon 6 and nylon 66 may be used. Polyester polymers are superior among polyamide polymers represented by polyamide polymers and polyester polymers represented by polyethylene terephthalate. In the present invention, the oblateness refers to the ratio 4l between the major axis L and the minor axis l of the flattened cross section of the filament, as shown in FIG. When the thickness is uneven as shown in FIG. 2, the major and minor axes take substantially the maximum value. The flatness ratio of the flat filament is preferably 2 or more, preferably 3 to be effective.
That's all. However, it is difficult to industrially produce filaments that are too flat, so the flatness ratio is preferably 6 or less. The flat filament is preferably a multifilament in order to obtain a fabric with excellent flexibility, and the denier is suitably from 30 to 200 deniers. Further, the unit denier is preferably 1 denier or more and 15 denier or less, preferably 2 denier or more and 7 denier or less. This is because if the denier is too small, there will be a lot of refraction and scattering of light when it passes through the fabric, reducing transparency and making it difficult to obtain the effects of the present invention.If the denier is too large, the fabric will of course become coarse and hard, and the resulting fabric will become difficult to obtain. The fabric becomes coarse and hard, which is not preferable. In general, high-molecular polymers have good transparency when spun into filaments without adding pigments, but they tend to become glossy.Therefore, fine particles of titanium oxide are usually kneaded in, but the higher the amount added, the clearer it becomes. Sex gets worse. Therefore, the amount of titanium oxide added is
It is preferably 0.1% or less. When weaving textiles, twisting the flat filaments should be avoided as it impairs the parallelism between the plane of the fabric and the flat plane of the flat filaments, but moderate twisting is necessary to improve weavability. There are many things. When twisting, it should be kept at 300 T/M, preferably 150 T/M or less. Fabrics are usually woven only with flat filaments, but when stripes or lattice patterns are required for the design, fibers other than flat filaments, especially yarn-dyed yarns or differently-dyed yarns, may be mixed and woven. Examples of the polymers constituting the film used in the present invention include polyurethane polymers, polyvinyl chloride polymers, polyamide polymers, polyester polymers, polyolefin polymers, polyacrylonitrile polymers, and polyvinyl alcohol polymers. However, polyurethane polymers and polyvinyl chloride polymers are preferred in terms of flexibility and ease of lamination. Films can be produced by melting a polymer and extruding it through a T-die, or by dissolving it in a solvent, coating it on release paper, and drying it to form a film.
The latter method is preferred as a method for making thin films; therefore, using a polyurethane polymer as the film makes it easier to make thin films. Lamination is usually done by applying an adhesive dissolved in a solvent onto the film, and then applying pressure to the fabric with a roll before and after the solvent dries, or directly heating the film itself, as in the case of polyvinyl chloride film. A method of crimping is used. Although the thickness of the film is not particularly limited, it is preferably 5μ or more from the viewpoint of stability of film formation, and preferably 50μ or less, preferably 30μ or less from the viewpoint of lightness and softness. Furthermore, dyeing or coloring the fabric, film, or adhesive to an extent that does not impair transparency is effective for enhancing the design of the structure of the present invention. Also, partially printing on textiles or films further enhances the design. When used for clothing, it goes without saying that water-repellent finishing, anti-dyeing finishing, anti-static finishing, etc. may be applied. (Function) FIG. 3 is an example of a cross section of the fiber structure of the present invention. Since the fabric 1 of the present invention is constituted by a flat filament 2 having a flat cross section, when light hits it, there is less diffuse reflection on the surface and the light is easily transmitted. This is because when the flat filament 2 is made into a woven fabric, the filament is pressed by the weave, so naturally the flat surface of the flat filament 2 is aligned parallel to the surface of the woven fabric 1 as shown in FIG. The light that hits the surface is less likely to be diffusely reflected, and more light is transmitted, resulting in excellent transparency. Furthermore, in the present invention, a transparent film 3 is bonded to a fabric 1 made of flat filaments 2 as shown in FIG. 4 in FIG. 3 is an adhesive. FIG. 4 is an enlarged cross-sectional view of the fabric 1 of the present invention. As already mentioned, when light hits the fabric 1 made of the flat filament 2, it is difficult to cause diffuse reflection and the light easily passes through, resulting in excellent transparency. Light is diffusely reflected at both ends (portion a in FIG. 4). However, in the case of the present invention, since the part that causes this diffuse reflection is filled with adhesive 4 as shown in Fig. 4 (if the film itself is thermocompressed, the polymer constituting the transparent film 3 is buried as shown in Fig. 5). Filling the end of the flat filament 2) Diffuse reflection is reduced,
It is thought that the light transmittance is improved. Furthermore, it is considered that the effect is greater when the surface to which the transparent film 3 is pasted is on the eye side than when it is on the object side. From this point of view, it is even more effective to bond the transparent film 3 to the screen of the fabric, if necessary. (Example) Pigment-free polyethylene terephthalate was melt-spun and stretched through a slit-shaped orifice.
A 50d/12f flat filament was obtained. The cross section of the filament obtained is as shown in Figure 1, and the oblateness is
It was 4.1. The obtained filament was woven without twisting, and then subjected to scouring and heat setting to obtain Fabric A having warp and weft thread densities of 113 threads/inch and 104 threads/inch as shown below, respectively. Next, we used a urethane elastomer made by Dainippon Ink and Chemicals Co., Ltd., Crisbon 6666HV (100% modulus).
50 Kg/cm ³ , tensile strength 600 Kg/cm ³ ) was diluted with DMF to adjust the viscosity to 3,000 to 6,000 cps, coated on release paper with a knife coater, and dried at 120° C. to produce a film with a thickness of 15 μm. In addition, two-component polyurethane Crisbon 4070 (100% Modulus 26) manufactured by Dainippon Ink and Chemicals Co., Ltd.
Kg/cm ³ ) 100 parts and crosslinking agent, the company's Crisbon
The mixture was mixed with 15 parts of NX, coated on the above film using a knife coater at a solid content of 30 g/m ^{2 ,} and dried at 100° C. to obtain an adhesive. Next, it was superimposed on the adhesive layer of the fabric A described above and pressed with a pressure roll. Leave this at 50℃ for one day and night.
A fiber structure B according to the present invention was obtained by aging the adhesive. Fabric A before pasting the film on the page of a small dictionary and fiber structure B of the present invention were pressed to see how easily the characters (6 points) in the dictionary were visible. Fabric A
In the case of , Chinese characters, especially those with many strokes, could not be clearly read, but in the case of Structure B of the present invention, they could be clearly read. When the structure B of the present invention is pressed against the page, when the film side is placed on the naked eye side, and when it is placed on the page side,
In either case, the letters on the page were more clearly visible than when only Fabric A was pressed, and they were especially visible when the film surface was viewed with the naked eye. In the figure, the light transmittance of the fabric A and the structure of the present invention was measured as follows. The results are shown in Table 1, and it can be seen that the light transmittance (transparency) of Structure B of the present invention is improved compared to Fabric A. Light transmittance measurement method: Using a spectrophotometer, each sample was measured at wavelengths of 400 nm, 500 nm, 600 nm,
Determine the light transmittance of visible light at 700 nm and calculate the average value.

[Table] (Effects of the invention) As described above, the fiber structure of the present invention has excellent transparency, and since it is an integral structure of woven fabric and film, it has excellent dimensional stability and strength, is lightweight, and has flexibility. It is suitable for creating various covers, packaging materials, and clothing that require transparency.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing the cross-sectional shape of a flat filament, and are explanatory diagrams of how to determine the flatness ratio. FIG. 3 is an explanatory diagram of the cross-sectional structure of the fiber structure of the present invention, in which 1 is a woven fabric, 2 is a flat filament, 3 is a transparent film, 4 is an adhesive, and a is an end of the flat filament. FIG. 4 is an enlarged cross-sectional view of the fiber structure of the present invention shown in FIG. 3. FIG. 5 is an explanatory diagram of a cross-sectional structure of a fiber structure showing another example of the present invention.

Claims (1)

[Scope of Claims] 1. A fabric made of a transparent filament made of a polyamide polymer or a polyester polymer and having an aspect ratio of 2 or more, with a transparent film made of a high molecular weight polymer attached to at least one side of the fabric. Transparent fabric. 2. The woven fabric according to claim 1, wherein the high molecular weight polymer of the filament yarn is a polyester polymer. 3. The woven fabric according to claim 1, which has an aspect ratio of 3 to 6. 4 Titanium oxide content of filament yarn is 0.1%
The fabric according to claim 1, which is as follows. 5. The woven fabric according to claim 1, wherein the number of twists of the filament yarn is 300 T/M or less. 6. The fabric according to claim 1, wherein the high molecular weight polymer of the film is a polyurethane polymer.