JP2004162194A - Non-visible woven fabric and interior article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-visible woven fabric which has excellent non-visibility without deteriorating a lighting property, and to provide an interior article. <P>SOLUTION: This non-visible woven fabric whose warps or wefts are formed of multi-filament yarns (A) comprising filaments whose each cross section is a flat cross section having two or more constricted portions and a flatness of 2 to 6 and produced from a fiber-forming thermoplastic polymer having a delustering agent content of <0.2wt.% is characterized by having a cover factor (CF) of 800 to 2,000. The interior article uses at least the non-visible woven fabric. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fabric and interior goods having excellent visibility without impairing daylighting performance.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in the interior field such as curtains, contradictory characteristics such as visibility (a property in which indoor articles and people cannot be seen from the outside) and daylighting are generally demanded.
[0003]
For this reason, usually a thick drape curtain is placed on the indoor side, a thin lace curtain is placed on the window side, the thick drape curtain is closed at night, and a thin lace curtain is used to ensure visibility and light during the day. It is common to keep the curtains closed. However, a thick drape curtain has poor daylighting properties, while a thin lace curtain has insufficient visibility at night as well as at night, and an improvement thereof has been desired.
[0004]
On the other hand, for example, a light-shielding curtain that reflects and absorbs light (for example, Patent Document 1) obtained by interweaving a polyester fiber containing a matting agent such as titanium oxide and a black original polyester fiber, or a fabric A mirror curtain (for example, Patent Document 2) in which a glossy triangular cross section yarn is knitted and woven on the side surface of the fabric and light is reflected on the glossy side surface, and the surface of the fabric is coated and laminated. The thing (for example, patent document 3) etc. which performed additional processes, such as a process, aluminum vapor deposition process, and sputtering process, are proposed.
[0005]
However, in the case where the fabric surface is subjected to additional processing and the light-shielding curtain, there is a problem that the interior of the room becomes difficult because of poor daylighting. On the other hand, the mirror curtain has a problem that although it has the daylighting property, the visibility is not sufficient especially at night, and further, there is a glare gloss due to the flat portion of the triangular cross section.
[0006]
Until now, proposals of fabrics having excellent visibility without impairing daylighting have not been made sufficiently, and such proposals have been desired.
[0007]
[Patent Document 1]
Japanese Patent No. 3167586 [Patent Document 2]
JP 2000-237035 A [Patent Document 3]
Japanese Utility Model Publication No. 62-113787
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide an anti-visibility fabric and interior article having excellent anti-visibility without impairing daylighting. It is in.
[0009]
[Means for Solving the Problems]
The inventor has arranged multifilaments on warps or wefts, which are made of a fiber-forming thermoplastic polymer having a matting agent content of a specific amount or less, and the cross-sectional shape of the filament is a flat cross section having a specific constricted portion. By forming the woven fabric, the multifilament becomes a dense and wide aggregate due to the contact pressure of the woven fabric structure point, so that the gap formed by the warp and the weft can be reduced. It has been found that when light passes through a filament having a specific cross section, irregular reflection and refraction tend to occur, and as a result, a fabric having visibility can be obtained without impairing the daylighting property. Further, the present invention has been completed by further intensive studies.
[0010]
Thus, according to the present invention, “a fiber whose cross-sectional shape is a flat cross section having a flatness of 2 to 6 having a constricted portion of two or more portions, and the content of the matting agent is less than 0.2% by weight. A multi-filament (A) made of a formable thermoplastic polymer comprising a warp or a weft and having a cover factor (CF) of 800 to 2000, providing an anti-visibility woven fabric " Is done.
[0011]
At that time, when the number of twists of the multifilament (A) is 1000 T / m or less, more excellent visibility is preferably obtained. Moreover, it is preferable that the light transmittance of a textile fabric is 20% or more from the point of daylighting. Such an anti-visibility fabric is suitably used for applications that require daylighting and visibility, such as interior goods.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is described in detail below.
First, in the multifilament (A) constituting the warp or weft of the visibility-proof fabric of the present invention, the cross-sectional shape (transverse cross-sectional shape) in the direction perpendicular to the fiber axis is two or more (preferably 3 to 5). ) And a filament (single yarn) having a cross-sectional flatness of 2 to 6 (preferably 3 to 5).
[0013]
Here, the cross-sectional flatness is the ratio (B / C) of the length (B) of the long side and the length (C) of the short side in the cross section of the filament. If the cross-sectional flatness is smaller than 2, it is difficult to form a widened aggregate form of the multifilament (A) in the woven fabric, and there is a risk that the gap (structure gap) formed by the warp and the weft will become large. is there. As a result, there is a possibility that light passes through the gap and sufficient visibility cannot be obtained, which is not preferable. On the contrary, when the cross-sectional flatness exceeds 6, it is not preferable because the yarn-making property becomes difficult.
[0014]
Next, the constricted portion is a portion where the short side length (C) is shortened, as schematically shown in FIG. In such a constricted portion, the depth of the concave portion is 1.05 or more (preferably 1.1 or more) as a ratio of the maximum value and minimum value of the short side length (C) (maximum of C / minimum of C). ) Is preferable. Moreover, in FIG. 1, although the thing in which the recessed part is formed in the both sides is illustrated, the recessed part may be formed only in one side part. The number of the constricted portions needs to be two or more. If the constricted portion is one or less, sufficient irregular reflection of light and refraction of transmitted light cannot be obtained at the constricted portion, and satisfactory visibility can be obtained. Since it is not, it is not preferable. The number of the constricted portions is not particularly limited as long as it is 2 or more, but 3 to 5 is appropriate in consideration of the yarn forming property. FIG. 1 illustrates the case where there are three constrictions.
[0015]
Next, the multifilament (A) is a fiber-forming thermoplastic polymer having a matting agent content of less than 0.2% by weight (preferably 0.1% by weight or less, more preferably 0% by weight). Become. When the content of the matting agent is 0.2% by weight or more with respect to the fiber weight, the light transmittance through which the light passes through the filament is lowered, so that it is not preferable because sufficient lighting properties cannot be obtained as a fabric. When the matting agent is included in the fiber-forming thermoplastic polymer, known inorganic fine particles such as titanium dioxide can be used as the matting agent.
[0016]
The fiber-forming thermoplastic polymer is not particularly limited, and synthetic fibers such as polyester, polyamide, polyvinylidene chloride, and polypropylene represented by polyethylene terephthalate and polytrimethylene terephthalate can be used. Of these, synthetic fibers such as polyester, polyamide, polyvinylidene chloride, and polypropylene obtained by melt spinning are preferred because of their ease of production.
[0017]
For such fiber-forming thermoplastic polymer, a fine pore-forming agent, a cationic dye, an anti-coloring agent, a thermal stabilizer, a flame retardant, and a fluorescent brightening agent are used as necessary within the range not impairing the object of the present invention. In addition, one or more colorants, antistatic agents, hygroscopic agents, antibacterial agents, inorganic fine particles, negative ion generators, and the like may be added.
[0018]
The fiber form of the multifilament (A) is not particularly limited, and may be long fibers or short fibers. Especially, in order to make small the space | gap formed with a warp and a weft, the non-twisted or sweet twisted long fiber is illustrated preferably. In particular, the number of twists is preferably 1000 T / m or less (more preferably 200 T / m or less, particularly preferably no twist).
[0019]
The multifilament (A) may be subjected to air twisting such as false twist crimping, taslan processing or interlace processing.
[0020]
The total fineness and single yarn fineness of the multifilament (A) are not particularly limited, but in terms of texture, the total fineness is 30 to 400 dtex (more preferably 50 to 200 dtex), and the single yarn fineness is 0.5 to 5 dtex (more The range of 1 to 4 dtex) is suitable.
[0021]
In the visibility-proof fabric of the present invention, the warp or the weft is composed of the multifilament (A). Here, both the warp and the weft may be constituted by the multifilament (A), or one of the warp and the weft is constituted by the multifilament (A), and the function of the antistatic yarn or the like is used as the other yarn. Yarn may be used. Further, when the warp or weft is constituted by the multifilament (A), a small amount may be mixed with other yarns within the range not impairing the object of the present invention.
[0022]
Next, in the woven fabric of the present invention, the cover factor (CF) needs to be 800-2000.
[0023]
Here, the cover factor (CF) is expressed.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
However, DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm).
[0024]
If the CF is smaller than 800, the gap formed between the warp and the weft tends to be large, which is not preferable because the visibility is lowered. On the contrary, if the CF is larger than 2000, the daylighting property is lowered, which is not preferable.
[0025]
In the anti-visibility fabric of the present invention, the woven structure is not particularly limited, and a known woven structure such as a plain structure, a twill structure, a satin structure, and the like can be used.
[0026]
The visibility-proof fabric of the present invention can be woven by a conventional weaving method using the multifilament (A) as a warp or a weft. Alkali weight loss processing and conventional dyeing finishing processing may be performed. Furthermore, conventional water-absorbing processing, water-repellent processing, brushed processing, and functions such as UV shielding or antistatic agent, antibacterial agent, deodorant agent, insect repellent agent, phosphorescent agent, retroreflective agent, negative ion generator, etc. Various processes for imparting may be additionally applied.
[0027]
In the anti-visibility fabric of the present invention thus obtained, the light transmittance is preferably 20% or more (more preferably 30% to 70%). Here, the light transmittance is a value obtained by subtracting from 100 the light shielding rate measured by the JIS L1055 6.1A method (illuminance: 100,000 lx). If the light transmittance is less than 20%, the daylighting property may be insufficient. On the contrary, if the light transmittance is larger than 70%, the visibility may be lowered.
[0028]
The light-transmitting fabric is woven using the multifilament (A) as a warp or a weft, and then dyed so that the anti-visibility fabric is finished from colorless or light to medium color at the time of dyeing finishing. And can be easily obtained by appropriately selecting the amount used.
[0029]
In the fabric for preventing visibility according to the present invention, since the cross-sectional shape of the filament constituting the multifilament (A) is a special flat shape, the multifilament (A) spreads densely and widely by the contact pressure of the fabric texture point. Has a structure. As a result, the gap formed by the warp and the weft is reduced, and the amount of light passing through the gap is reduced. At that time, a very small amount of passing light passing through the gap is diffracted, and adjacent passing light interferes with each other, thereby obtaining an excellent visual recognition effect. Furthermore, since the cross-sectional shape of the filament is a flat cross-sectional shape having a specific constricted portion and the content of the matting agent is not more than a specific amount, flat flat cross-sectional yarns, round cross-sectional yarns, triangular cross-sectional yarns of the same fineness Compared with the above, irregular reflection of light and refraction of transmitted light that passes through the filament are increased, and an excellent anti-visual effect can be obtained without impairing the daylighting property.
[0030]
In addition, since the multifilament (A) has a wide structure in the anti-visibility fabric of the present invention, the bending rigidity is lowered and a soft texture is added. Furthermore, at the fabric texture point, the constricted part (concave part) is less likely to come into contact with the other thread, so the friction between the warp and the weft is reduced, and it is possible to obtain a softer texture than that having a flat flat shape. become.
[0031]
The visibility-proof fabric of the present invention is suitably used as interior goods such as curtains, roll blinds, and partitions after being appropriately sewn.
[0032]
【Example】
Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.
<Light transmittance> After measuring the light shielding rate (%) by the JIS L1055 6.1A method (illuminance 100,000 lx), the light transmittance (%) was obtained by the following formula.
(Light transmittance) = 100− (Light blocking ratio)
<Anti-Visibility> As a daytime measurement method, place a visual object at a position 20 cm away from an anti-visible fabric in an indoor 80 W fluorescent lamp 700 lx environment, and sandwich the fabric outside (daytime sunlight 100,000 lx). An evaluator was placed at a position 30 cm away from the fabric, and it was visually determined whether or not the evaluator could confirm the visual object. The judgment criteria are ◎ when the visually recognized object can be found, ◯ when slightly visible, Δ when the outline of the visually recognized object is visible, and × when the visually recognized object can be found.
[0033]
Also, as a measurement method at night, place a visible object at a position 20 cm away from the fabric for preventing visibility in an indoor 80 W fluorescent lamp 700 lx environment, and 30 cm from the fabric outside the room (at night 0.2 lx) across the fabric. An evaluator was placed at a distant position, and it was visually determined whether or not the evaluator could confirm the visually recognized object. The judgment criteria were the same as the daytime measurement method.
[0034]
[Example 1]
A polyethylene terephthalate containing no matting agent is spun at a spinning temperature of 300 ° C. from a die perforated in four flat cross-sections (necked portions of 3), taken up at 4000 m / min, and continuously pulled up without being wound up once. A flat cross section (cross section flatness of 3.2) having three constricted portions (maximum / minimum of the length C of the short side = 1.2) as shown in FIG. ) Multifilament (A) 84 dtex / 30 fil was obtained.
[0035]
Next, the multifilament (A) was untwisted and used with a history of 100%, and a plain woven fabric was obtained by a conventional weaving method. And the anti-viscosity textile of Cover factor 1000 was obtained by giving a usual dyeing process.
[0036]
In the fabric for preventing visibility, the light transmittance was 35%, the visibility (daytime) ◎, and the visibility (nighttime) ○.
[0037]
[Example 2]
In Example 1, except that the cover factor of the visibility-proof fabric was changed to 880, weaving and dyeing were performed in the same manner as in Example 1 to obtain a visibility-proof fabric.
[0038]
In the fabric for preventing visibility, the light transmittance was 40%, the visibility (daytime) ○, and the visibility (nighttime) ○.
[0039]
[Example 3]
In Example 1, except that the cover factor of the visibility-proof fabric was changed to 1800, weaving and dyeing were performed in the same manner as in Example 1 to obtain a visibility-proof fabric.
[0040]
In the fabric for preventing visibility, the light transmittance was 25%, the visibility (daytime) 、, and the visibility (nighttime) ◎.
[0041]
[Example 4]
In Example 1, a non-visible fabric was obtained by weaving and dyeing in the same manner as in Example 1 except that a multifilament (A) twisted at 200 T / m was used.
[0042]
In the fabric for preventing visibility, the light transmittance was 33%, the visibility (daytime) ○, and the visibility (nighttime) ○.
[0043]
[Comparative Example 1]
In Example 1, an anti-visibility fabric was obtained in the same manner as in Example 1 except that the cross-sectional shape of the filament was changed to a flat flat cross section (cross section flatness 3.2) without a constricted portion.
[0044]
In the fabric for preventing visibility, the light transmittance was 30%, the visibility (daytime) Δ, and the visibility (nighttime) Δ.
[0045]
[Comparative Example 2]
In Example 1, an anti-visibility fabric was obtained in the same manner as in Example 1 except that the cross-sectional shape of the filament was changed to a triangular cross section.
[0046]
In the fabric for preventing visibility, the light transmittance was 25%, the visibility (daytime) Δ, and the visibility (nighttime) ×.
[0047]
[Comparative Example 3]
In Example 1, an anti-visibility fabric was obtained in the same manner as in Example 1 except that the cross-sectional shape of the filament was changed to a round cross section.
[0048]
In the anti-visibility fabric, the light transmittance was 30%, the anti-visibility (daytime) x, and the anti-visibility (nighttime) x.
[0049]
[Comparative Example 4]
In Example 2, a non-visible fabric was obtained in the same manner as in Example 2 except that the cross-sectional shape of the filament was changed to a triangular cross section.
[0050]
In the anti-visibility fabric, the light transmittance was 30%, the anti-visibility (daytime) x, and the anti-visibility (nighttime) x.
[0051]
[Comparative Example 5]
In Example 3, an anti-visibility fabric was obtained in the same manner as in Example 3 except that the cross-sectional shape of the filament was changed to a triangular cross section.
[0052]
In the fabric for preventing visibility, the light transmittance was 15%, the visibility (daytime) ○, and the visibility (nighttime) Δ.
[0053]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the textile fabric and interior goods which have the outstanding visibility prevention without impairing lighting property are provided.
[Brief description of the drawings]
FIG. 1 schematically illustrates a flat cross-sectional shape having a constricted portion according to the present invention.
[Explanation of symbols]
1 Constriction

Claims (4)

A multifilament made of a fiber-forming thermoplastic polymer having a cross-sectional flatness of 2 to 6 with a cross-sectional shape of the filament having two or more constricted portions and a matting agent content of less than 0.2% by weight A fabric for preventing visibility, which is a woven fabric comprising warp or weft in (A) and having a cover factor (CF) of 800-2000. The fabric for preventing visibility according to claim 1, wherein the number of twists of the multifilament (A) is 1000 T / m or less. The anti-visibility fabric according to claim 1 or 2, wherein the light transmittance is 20% or more. An interior article comprising at least the fabric for preventing visibility according to any one of claims 1 to 3.

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