JP7281185B2 - Blind fabric with cloud dragon pattern and method for producing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a blind fabric having a cloud dragon pattern and a method for producing the same, and more particularly to a blind fabric having a cloud dragon pattern and a method for producing the same, which is used when making a shade part of a blind installed in a window of a building.

Hitherto, it has been proposed to adopt a nonwoven fabric with a cloud dragon pattern, which is excellent in design, as a fabric used for the awning portion of blinds and curtains (Patent Document 1). The non-woven fabric having a cloud dragon pattern proposed in Patent Document 1 is made by mixing two types of short fibers, and is intended to express the cloud dragon pattern due to the difference in gloss between the short fibers. That is, this nonwoven fabric is obtained by mixing polyethylene terephthalate short fibers and acrylic short fibers and bonding the two short fibers with thermal adhesive fibers (Patent Document 1, Claim 1). However, there was a drawback that a clear cloud dragon pattern could not be developed only by mixing two kinds of short fibers. In addition, since this nonwoven fabric is composed of short fibers, it has a drawback of insufficient mechanical strength.

In order to develop a clear cloud dragon pattern, it is considered that the cloud dragon paper as described in Patent Document 2 should be adopted. Unryu paper is made by adhering aggregates of short rayon fibers having a fiber length of 10 to 30 mm to form an unryu pattern on one side of a base paper by kneading (Patent Document 2, Claims 2 and 5). However, when such Unryu paper is used as a blind fabric, there is a drawback that the Unryu pattern is easily rubbed and dropped during handling such as opening and closing the blind. Moreover, since it is composed only of short cellulose fibers such as pulp or rayon short fibers, it has the drawback of insufficient mechanical strength and insufficient weather resistance.

JP 2014-161712 A Japanese Unexamined Patent Application Publication No. 2007-9374

It is an object of the present invention to provide a blind fabric that develops a clear cloud dragon pattern, does not easily drop the cloud dragon pattern, and has excellent mechanical strength and weather resistance.

The present invention solves the above problems by laminating a specific long-fiber nonwoven fabric and a specific Unryu paper so that the Unryu pattern is on the inside. That is, in the present invention, Unryu paper 3 and long fiber nonwoven fabric 4 having polyethylene terephthalate long fibers as constituent fibers are pasted together with an adhesive 5 with the Unryu pattern 2 of the Unryu paper 3 on the inside. The base paper 1 contains polyester short fibers, and the cloud dragon pattern 2 of the cloud dragon paper 3 is composed of aggregates of polyethylene terephthalate short fibers. It is about.

The blind fabric according to the present invention is obtained by pasting a cloud dragon paper 3 and a long fiber nonwoven fabric 4 with an adhesive 5 with the cloud dragon pattern 2 on the inside. Therefore, the cloud dragon pattern 2 is not exposed to the outer surface and will not come off due to rubbing during handling such as opening and closing the blind. In addition, since the long-fiber nonwoven fabric 4 is composed of long fibers, it is superior in mechanical strength to nonwoven fabrics composed of short fibers. Further, the material of the long fiber nonwoven fabric 4 and the cloud dragon pattern 2 is polyethylene terephthalate, and the base paper 1 also contains polyester and is made of the same kind of material. Therefore, when the blind fabric is heated by direct sunlight, the difference in shrinkage rate is small, and wrinkles and floats are less likely to occur. Therefore, it has excellent weather resistance and is suitable as a blind material.

1 is a schematic side view of a blind fabric according to an example of the present invention; FIG. 1 is a photograph of the surface (from the long-fiber nonwoven fabric side) of a blind fabric according to an example of the present invention. 1 is a photograph of the back side (from the base paper side) of a blind fabric according to an example of the present invention.

The long-fiber nonwoven fabric 4 used for the blind fabric according to the present invention is composed of polyethylene terephthalate long fibers. The fineness of polyethylene terephthalate fiber is about 2.2 to 5.5 decitex. The constituent fibers are bonded to each other by a conventionally known method such as bonding by heat fusion or bonding by a binder. In carrying out the present invention, it is preferable to bind the constituent fibers with each other using a soft and highly elastic acrylic resin binder. This is because the resulting long-fiber nonwoven fabric 4 can be given a softer feel compared to bonding by heat fusion. Among acrylic resins, it is preferable to use an acrylic resin having a glass transition temperature of room temperature or lower, specifically 10° C. or lower. This is because the softness of the long-fiber nonwoven fabric 4 can be further improved. The glass transition temperature is measured by a differential scanning calorimeter (DSC) at a heating rate of 20°C/min.

The basis weight of the long-fiber nonwoven fabric 4 may be of any degree as long as it has translucency to the extent that the cloud dragon pattern 2 can be visually observed. Specifically, it is preferably 20 to 30 g/m ² . If the basis weight is less than 20 g/m ² , the adhesive 5 may ooze out on the surface. If the adhesive 5 oozes out, when a pattern, letter, or the like is printed on the outer surface of the long-fiber nonwoven fabric 4, it is difficult for the printing ink to adhere, and there is a risk of uneven printing. If the basis weight exceeds 30 g/m ² , the weight of the blind fabric tends to increase.

The cloud dragon paper 3 is formed by attaching a cloud dragon pattern 2 to one side of a base paper 1.例文帳に追加The base paper 1 contains polyester staple fibers to improve weather resistance. As polyester staple fibers, polyethylene terephthalate staple fibers or copolymerized polyester staple fibers are employed. The base paper 1 may be made of only polyester staple fibers, but since it is difficult to make paper, it is generally mixed with pulp, rayon staple fibers and/or polyvinyl alcohol staple fibers. The content of polyester staple fibers in the base paper 1 is preferably 50% by weight or more. If the polyester staple fiber content is too small, the weather resistance of the blind fabric may be reduced.

The basis weight of the base paper 1 may be of any degree as long as it has translucency to the extent that the cloud dragon pattern 2 can be visually observed. Specifically, it is preferably 15 to 25 g/m ² . If the basis weight of the base paper 1 is less than 15 g/m ² , the strength of the base paper 1 is lowered, and there is a possibility that the base paper 1 will break during the manufacture of the blind fabric. Further, when the basis weight of the base paper 1 exceeds 25 g/m ² , the weight of the blind fabric tends to increase.

The cloud dragon pattern 2 is composed of an aggregate of polyethylene terephthalate short fibers. The fiber length of the polyethylene terephthalate short fibers is about 15 to 30 mm, and when they are bundled together, they become agglomerates to form the unryu pattern 2 .

The unryu paper 3 and the long-fiber nonwoven fabric 4 are pasted together with an adhesive 5 in such a manner that the surface of the unryu pattern 2 and the long-fiber nonwoven fabric 4 are in contact with each other. Any adhesive may be used as the adhesive 5 as long as it does not easily soften or deteriorate when the blind fabric is exposed to direct sunlight and heated. When the blind fabric is produced by extrusion lamination, it is preferable to employ high-density polyethylene, and it is particularly preferable to employ high-density polyethylene having a melting point of 120° C. or higher. Furthermore, it is most preferable to use high-density polyethylene having a melting point of 120° C. or higher and a Vicat softening point of 100° C. or higher. When such high-density polyethylene is used, separation between the unryu paper 3 and the long-fiber nonwoven fabric 4 is less likely to occur even when the blind fabric is heated. The melting point of polyethylene was measured using a differential scanning calorimeter DSC-7 manufactured by PerkinElmer at a heating rate of 20° C./min. The Vicat softening point of polyethylene was measured under a load of 50 N and a heating rate of 50° C./hour.

The blind fabric according to the present invention can be produced by extrusion lamination as follows. That is, the surface of the unryu paper 3 to which the unryu pattern 2 is attached is pressed against one surface of a molten film obtained by melting and extruding high-density polyethylene, and polyethylene terephthalate long fibers are applied to the other surface of the molten film. In this method, the long-fiber nonwoven fabric 4 used as the constituent fibers is pressed against each other, and the unryu paper 3 and the long-fiber nonwoven fabric 4 are pasted together by the melted film.

A conventionally known T-die may be used to melt the high-density polyethylene and extrude it into a film. The thickness of the molten film extruded from the T-die is arbitrary, but specifically it is preferably in the range of 15 to 25 μm. When the thickness of the melted film is less than 15 μm, the unryu paper 3 and the long-fiber nonwoven fabric 4 tend to be insufficiently bonded. Further, when the thickness of the melted film exceeds 25 μm, the weight of the resulting blind cloth tends to be heavy.

In a state in which the extruded melted film is not yet solidified, the surface of the unryu paper 3 to which the unryu pattern 2 is attached is pressed against one surface of the melted film, and the long-fiber nonwoven fabric 4 is pressed against the other surface of the melted film. . As a result, the unryu paper 3 and the long-fiber nonwoven fabric 4 are bonded together by the fusing force of the melted film to obtain the blind cloth.

The base paper or long-fiber nonwoven fabric of the blind fabric according to the present invention may be subjected to dyeing, textile printing, printing, or the like. The blind fabric according to the present invention can be used, for example, as blind slats after being cut to a predetermined size. It can also be pleated and used as a folding blind.

Example 1
A long-fiber nonwoven fabric having a basis weight of 25 g/m ² was prepared by bonding polyethylene terephthalate long fibers with a fineness of 3.3 dtex with an acrylic resin (glass transition temperature -2°C). On the other hand, Unryu paper (basis weight: 20 g/m ² ) was prepared by attaching a cloud dragon pattern, which is an aggregate of polyethylene terephthalate short fibers having a fiber length of 20 mm, to a base paper containing 50% by weight of polyethylene terephthalate short fibers. Then, a high-density polyethylene having a melting point of 133° C., a Vicat softening point of 109° C. and a density of 940 kg/m ³ was extruded from a T-die as a molten film having a thickness of 20 μm. Unryu paper was pressed onto one side of this melted film, and long-fiber nonwoven fabric was pressed onto the other side to obtain a blind cloth having a basis weight of 64 g/m ² . At this time, the unryu pattern of the unryu paper was pressed against the molten film.

Example 2
A blind fabric was obtained in the same manner as in Example 1, except that the basis weight of the long-fiber nonwoven fabric was changed to 30 g/m ² .

Example 3
A blind fabric was obtained in the same manner as in Example 1, except that the thickness of the melted film was changed to 18 μm.

Comparative example 1
A blind fabric was obtained in the same manner as in Example 1, except that the Unryu pattern was changed to an aggregate of rayon short fibers (a mixture of 20 mm and 25 mm fiber lengths).

When the blind fabrics obtained in Examples 1 to 3 and Comparative Example 1 were heated at 121° C. for 30 minutes, their shrinkage was measured. In addition, the state of wrinkles due to shrinkage was visually observed. Furthermore, the bonding state of the unryu paper and the long-fiber nonwoven fabric was visually observed. The results are shown in Table 1.
[Table 1]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Shrinkage rate (%) Shrinkage wrinkles Laminated state ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
MD direction CD direction
━━━━━━━━━━━
Example 1 0.8 0.4 None Normal Example 2 0.7 0.3 None Normal Example 3 0.9 0.5 None Normal Comparative Example 1 0.9 0.4 Yes Floating ━━━━━ ━━━━━━━━━━━━━━━━━━━━━━━━━━━

The blind fabrics according to Examples 1 to 3 and Comparative Example 1 all had a low shrinkage rate, and even when heated by direct sunlight, the shape did not change. However, in the blind fabric according to Comparative Example 1, since the cloud dragon pattern is composed of rayon short fibers, there is a difference in shrinkage rate between the short fibers and the polyethylene terephthalate long fibers of the long-fiber nonwoven fabric, and shrinkage wrinkles occur. , there was a case where floating occurred between the Unryu paper and the long-fiber nonwoven fabric. On the other hand, the blind fabrics according to Examples 1 to 3 did not cause shrinkage wrinkles and floating.

1 base paper 2 cloud dragon pattern 3 cloud dragon paper 4 long fiber nonwoven fabric 5 adhesive

Claims (6)

Unryu paper and a filament nonwoven fabric composed of polyethylene terephthalate filaments are laminated with an adhesive with the Unryu pattern of the Unryu paper inside, and the base paper of the Unryu paper contains polyester short fibers. A blind fabric having a cloud dragon pattern, wherein the cloud dragon pattern of the cloud dragon paper is composed of aggregates of polyethylene terephthalate short fibers. 2. The blind fabric having a cloud dragon pattern according to claim 1, wherein the adhesive is high density polyethylene. 2. A blind fabric having a cloud dragon pattern according to claim 1, wherein the constituent fibers of the long-fiber nonwoven fabric are bonded with an acrylic resin. The blind fabric having a cloud dragon pattern according to claim 1, wherein the base paper has a basis weight of 15 to 25 g/m ² and the long fiber nonwoven fabric has a basis weight of 20 to 30 g/m ² . The surface of the unryu paper on which the unryu pattern is attached is pressed against one surface of the melted film obtained by melting and extruding high-density polyethylene into a film, and polyethylene terephthalate long fibers are used as constituent fibers on the other surface of the melted film. 2. The method for producing a blind fabric having a cloud dragon pattern according to claim 1, wherein the long fiber nonwoven fabric is pressed against each other and the unryu paper and the long fiber nonwoven fabric are bonded together by the melted film. 6. The method for producing a blind fabric having a cloud dragon pattern according to claim 5, wherein the melted film has a thickness of 15 to 25 μm.

Images