JPH049217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light-shielding fabric used for blackout curtains and curtains.

[Conventional technology]

Flexibility is the most important quality characteristic factor of curtains.

Dense or thick, dark-colored fabrics can be used for blackout curtains. However, curtains made of dark and dark colored fabrics give a bad impression, and when hung, they make the room dim even when the lights are on, and they also absorb solar heat, making the room stuffy.

Therefore, in order to improve the appearance of the curtain without impairing its light-shielding properties, the dark-colored light-shielding threads are covered with other light-colored threads using multiple weaving structures such as double weft, double warp, and double warp. I have to.

A simple method for measuring light shielding properties is to use a photo magnifier. According to this method, the illuminance of the printing surface illuminated by the light source of a photo enlarger is adjusted to 15,000 lux, the fabric is set on the photographic film set surface, the illuminance of the printing surface is measured, and the light-shielding performance is evaluated using the measured value. represent. According to a rule of thumb, fabrics with a measurement value of 10 to 25 lux by this method can be used for blackout curtains for bedrooms in ordinary homes, while fabrics with a measurement value of 0 to 10 lux have light blocking properties that do not disturb a good night's sleep and can be used in projection rooms. The 0-lux fabric can be used for all-weather gymnasiums and blackout curtains for darkrooms.

[Problem that the invention seeks to solve]

Even when woven fabrics are densely woven, there are gaps where the warp and weft intersect. For this reason, even if the dark-colored light-shielding yarn is covered with other yarns in a double weave structure, the shadows of the dark-colored light-shielding yarn will appear from the weaving gaps, making the appearance of the fabric dark.
In addition, dark-colored light-shielding threads appear scattered in slightly large weaving gaps that are randomly created due to variations in yarn count and weaving density, impairing the appearance of the fabric.

Furthermore, even if a pattern is woven using warp and warp pattern threads from Jiyaguard, etc., the warp and weft threads are connected at the outline of the pattern, so there is a large weaving gap, and the pattern appears to be bordered by dark-colored light-shielding threads. I can only do it.
Of course, this problem could be solved by covering the dark-colored light-shielding threads with outer pattern threads in multiple layers, but this would increase the amount of threads used and increase the cost. As the number of threads increases, the weaving efficiency also decreases, resulting in a thicker fabric, which impairs the feel of a curtain.

In this way, conventional light-shielding fabrics, including those with a double weave structure, generally give a black, dark and unpleasant image, and because they use a large amount of warp and weft threads, they are heavy and expensive, and they are difficult to weave. Due to restrictions on the design of the tissue, it is not possible to obtain a cloth with good drape properties.

Therefore, the present invention eliminates the dark and cold image of dark, muddy colors associated with product names such as "blackout curtains" and "shading curtains," and creates a wide variety of light-shielding fabrics with bright, pale colors that stimulate the desire to purchase. The aim is to respond to demand by offering a variety of products.

The second object of the present invention is to reduce the amount of warp and warp yarns used (basis weight) to economically and efficiently obtain a light-shielding fabric.

A third object of the present invention is to obtain a light-shielding fabric that is thin and light, has drapability that is no different from general curtains in terms of weaving structure, and has a good feel, thereby increasing the demand for the fabric. be.

Other objects of the invention will become apparent from the description below.

[Structure of the invention]

The light-shielding fabric according to the present invention has warps or wefts,
Alternatively, core-sheath yarns are used for both the warp and weft, and the core of the core-sheath yarns is dark-colored.

Core-sheath yarns are produced by spinning methods and twisting methods in which the core yarn is covered with sheath yarns or fibers, coating methods in which the surface of the core yarn is coated with resin and a coating film is formed on the sheath part, and fibers are coated with a binder on the surface of the core yarn. The sheath is made by electrostatic flocking, which involves electrostatically flocking pile (frotsky) to form a sheath.In particular, the core-sheath yarn produced by the electrostatic flocking method has piles densely planted on the surface of the core yarn. It is particularly recommended because it provides good coverage and is soft and flexible.

FIG. 1 shows an example of a manufacturing method using a twisting method, in which a sheath yarn spindle 13 is set on a cylindrical guide 12 that is rotationally driven by an endless belt 11, and the sheath yarn spindle 13 is passed through the axes of the guide 12 and spindle 13. When the core yarn 14 is pulled out and the sheath yarns 15 wound around the spindle 13 are pulled out together, the sheath yarn 15 wraps around the core yarn 14, and the core 14' as shown in FIG. A core-sheath thread 16 wrapped in a core-sheath yarn 16 is obtained.

The core yarn 14 may be pre-dyed in a deep dark color. However, when the dyeing properties of the core and sheath yarns are different, such as cellulose fibers and polyester fibers, the core and sheath yarns are dyed using a dyeing solution prepared so that only the core yarns are dyed in a deep dark color. It can also be applied to strips or fabrics to make the core threads dark and dark. For example, when the core yarn 14 is made of polyester fiber and the sheath yarn 15 is made of cellulose fiber, the core yarn 14 is made dark with a black disperse dye, and the sheath yarn 15 is made with a light yellow-green direct dye or a reactive dye. It can also be dyed a light yellow-green color.

Here, the term "dark color" refers to a dark color that is so low in brightness that it appears to be pitch black or almost pitch black.

The dark-colored core portion 14 provides light-shielding properties to the fabric 17. Therefore, when the apparent radius of the core-sheath thread 16 is R and the apparent radius of the core portion 14 is r, Thickness S of the sheath part determined by
R−r) is set to 0.4R or less, that is, r>0.6R, and preferably S=about 0.2R, that is, r≈0.8R. To explain with a specific example, the thickness of the core-sheath thread 16 is
For 750d (about 8th thread), set the thickness of core thread 14 to 450d.
(approximately 12th position). However, the weaving structure and the weaving density of the core-sheath threads 16 (the number of core-sheath threads woven per unit length of the warp and weft of the fabric) are also factors regarding the light-shielding property of the fabric 17, so the core The relationship between the thickness r and the thickness S of the sheath portion is not an essential component of the present invention, and the degree of light shielding of the fabric 17 is also set according to demand, so it is not an essential component of the present invention.
That is, the thickness S of the sheath portion 15 is set to a sufficient extent to cover the core portion 14, but as will be described later, in a fabric woven with a double weft, double warp, and double weave structure, the thickness S of the sheath portion 15 is set to a level that sufficiently covers the core portion 14, but as will be described later, in a fabric woven with a double weft, double warp, and double weave structure, When applying the core-sheath thread 16 as a back weft or back warp that is hidden behind both the front warp and front weft, the thickness S of the sheath section 15 should not be set to such an extent that the core section 14 is completely covered. Although it is not necessary, the intended purpose of the present invention can be achieved even if the surface of the core/sheath thread 16 is slightly grayish.

Although the weave structure of the fabric 17 is not an essential component of the present invention, triple weave and other multi-ply weave structures are excluded from the purpose of the present invention. That is, since the present invention relates to the improvement of conventional light-shielding fabrics commonly used as light-shielding curtains and blackout curtains, the scope of application is limited to thick fabrics having double weft, double warp, and double warp weave structures. .

In the present invention, the core-sheath threads 16 are used as warp threads, warp threads, or both warp threads and weft threads. However, in the case of a double weave structure, the back warp, the back weft, or both the back warp and the back weft,
If the core-sheath thread 16 is used as the back thread, it is not necessarily necessary to use it as the front thread. In other words, the core-sheath thread 16 is used to make the fabric light-shielding, and specifically, the light-shielding performance of the fabric obtained by the above-mentioned simple method is
If used so that the lux is 25 lux or less, the core-sheath yarn 1
However, the use of threads 18 and 19 other than the core-sheath threads as both the warp and weft does not reduce or limit the scope of the claims of the present invention.

Preferred embodiments of the present invention are Examples 1 and 2.
As shown in the figure, the core-sheath thread 16 is used as the weft, and the woven structure is a non-plain weave, that is, a starch weave or a diagonal weave, and the weave is densely woven so that the light-shielding performance of the fabric is 25 lux or less. That is, the core-sheath thread 16 is used as the weft, and it is beaten with a reed to form the core threads 14a, 1 of each weaving row.
4b... (○ mark A in Figure 7) It is important to weave so densely that they are substantially close together.

〔Effect of the invention〕

As explained above, since the core portion 14 of the core-sheath thread 16 to be woven is darkly colored, the light-shielding fabric 17 can be obtained, but according to the present invention, the following effects are further produced.

(1) Even though the inside of the core-sheath thread 16 that imparts light-shielding properties to the fabric is deep and dark, the surface is covered with fibers 16 of other colors. For this reason, even if the double weave structure is not used, the deep dark color inside does not appear on the surface, and the sheath part 1
A light-shielding fabric with a bright and pale color corresponding to the color 5 is obtained.

(2) Even if the light-shielding fabric 17 is woven with a double weave structure in which the core-sheath yarns 16 are covered with other outer pattern yarns 19, the shadows of the core-sheath yarns will appear on the surface from the weaving gaps and the fabric will become It does not darken the image of the fabric, and even if the weaving gap becomes slightly larger due to variations in yarn count or weaving density, dark and dark colors do not appear in dots, creating an eaves-like appearance on the fabric. do not have.

(3) A light-shielding fabric with a richly colored pattern can be obtained without the surface pattern woven with the front pattern threads 19 from Jiyagard etc. being bordered in dark and dark colors.

(4) In order to weave a light-shielding fabric, the weaving structure does not necessarily have to be a double weave structure. Therefore, it is possible to reduce the amount of thread used to reduce the cost, and reduce the number of threads to be woven to improve weaving efficiency. To economically obtain a light-shielding fabric that is thin, light, has drapability no different from ordinary curtains, and has a good texture.

(5) The weave structure of the light-shielding fabric does not necessarily have to be a double weave structure, allowing freedom in the design of the weave structure.

(6) When a printed curtain is hung in a window where sunlight shines in, the pattern on the front surface becomes a shadow and is reflected on the back side.
However, according to the present invention, even if the fabric is thin and does not have a double weave structure, a light-shielding layer is formed inside by the dark-colored core 14, so even if a pattern is printed on the front side, the shadow will not appear on the back side. Then, by printing a different pattern on the back side, you can obtain curtains with different patterns and colors on the front and back sides.

(7) Because there is a dark colored layer inside the fabric due to the core,
Even polyester fibers whose sheath portions 15 appearing on the surface are dark and difficult to dye appear dark in color, thus reducing dyeing costs.

(8) When the core and sheath parts have different dyeability, such as cellulose fiber and polyester fiber, it is possible to dye the core part in a deep dark color and the sheath part in a light and light color by post-dying. I can do it. Since piece-dying becomes possible in this way, if you stock plain gray fabric and post-dye it according to demand, you can reduce the inventory of products with different colors and reduce the interest burden on stocked products. .

(9) If the sheath is made of cellulose fiber or cotton and the core is made of synthetic fiber such as polyester, a light-shielding fabric that is hygroscopic and does not generate static electricity and is substantially made of synthetic fibers can be obtained.

(10) Light-shielding fabrics have a thin, supple texture, and bright colors that give warmth, so they are considered "light-shielding".
There is no dark image of a "blackout curtain", and the weave structure can be designed freely, so it is possible to change the design and have a rich lineup of blackout curtains, which stimulates the desire to purchase and promotes demand and sales, which was completely unexpected in the past. Extremely new “pure white blackout curtains”
You can also get

Example 1 A core portion 14 of dark polyester sliver is made of
It was covered with a sheath part 15 of rayon sliver to obtain a core-sheath thread 16 having a thickness of 8th (the core part 14 had a thickness of 12th).

This core/sheath yarn 16 is used as the back weft, and the rayon spun yarns 18 and 19 are used as the front warp and front weft, and the fabric is woven into a two-ply weft structure with an 8-ply satin weave on the front side and a 3/1 diagonal weave on the back side. 17, it was dyed with a direct dye to pale yellow-green.

The fabric 17 obtained in this manner has a light-shielding property, and the front side is a solid light yellow-green color, the back side is a solid yellow-green color that is slightly darker than the front side, and the dark and dark color of the core yarn 14 is completely absent on the front and back sides. The light-blocking curtains did not appear, and the overall light-blocking curtains were pale, bright, and refreshing.

FIG. 3 shows the weaving structure diagram of the front side of this light-shielding curtain, and the black circles indicate the connection points where the warp threads cross over the front weft threads.

Figure 4 shows the weaving structure diagram on the back side, and the ○ marks indicate the connection points where the warp threads go under the back weft threads.

FIG. 5 shows a weft double weave structure diagram in which the front and back sides are composed of the weave structures shown in FIGS. 3 and 4,
The ● marks are the joining points where the warp passes over the top of the front weft, the □ marks are the joining points where the warp goes under the front weft, the ■ marks are the joining points where the warp passes over the back weft, and the ○ marks are the joining points where the warp passes over the back weft. It shows the joining point where the warp goes under the back weft.

FIG. 6 shows a cross section of the light-shielding fabric 17 according to this embodiment at a portion corresponding to the weft weave steps 21 and 22 in FIG. 5.

In the figure, L indicates the warp arrangement, M indicates the front weft arrangement,
Further, N indicates the back weft arrangement.

Example 2 Using the core-sheath yarn 16 of Example 1 as the weft and the rayon spun yarn 18 as the warp, five sheets were woven into a satin weave, and a pattern was printed directly on the front and back sides of the resulting gray fabric 17 with a dye.

The fabric 17 obtained in this way has light-shielding properties, the dark and dark colors of the core yarn 14 do not appear on the front and back sides, the shadows of the patterns on the front and back do not appear on the other, and the fabric 17 is thin and supple with different pattern colors on the front and back sides. Blackout curtains were obtained.

FIG. 7 shows a blackout curtain 17 according to this embodiment.
, the part surrounded by ○ mark A shows this curtain fabric in an enlarged manner, and the sheath part 15 of the weft yarn 16 is cut away at the lower left part of ○ mark A to show the core-sheath structure.

[Brief explanation of drawings]

Figure 1 is an explanatory perspective view of the manufacturing process of the core-sheath yarn, Figure 2 is a perspective view of the core-sheath yarn, Figure 3 is a weaving diagram of the front and back sides of the blackout curtain, and Figure 4 is the weave structure diagram of the back side of the blackout curtain. Fig. 5 is a weave structure diagram of a light-blocking curtain, Fig. 6 is a partial cross-sectional view of the light-blocking curtain along the weft thread steps 21 and 22 in Fig. 5, and Fig. 7 is a weft structure diagram of a light-blocking curtain. FIG. 2 is a plan view of the light-shielding curtain showing a part of the shaded curtain enlarged within mark A. FIG. 11... Endless belt, 12... Cylindrical guide, 13... Spindle, 14... Core thread, 15...
... Sheath thread, 16... Core-sheath thread (weft), 17... Shading curtain (fabric), 18... Warp that is not core-sheath thread, 19... Weft thread that is not core-sheath thread, 21, 22...
...Weft weaving step, L...warp arrangement, M, N...weft arrangement.

Claims (1)

[Claims] 1 Warp and weft, or both warp and weft,
The core part 14 is a woven fabric in which a core-sheath thread 16 is covered with a sheath part 15, and the core part 14 and the sheath part 15 of the core-sheath thread 16 are different in color. A light-shielding curtain fabric characterized in that the color of the sheath part 16 is darker than the color of the sheath part 16.