JP3167586B2 - Flameproof curtain - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackout curtain containing, as a constituent fiber, black-dyed polyester fiber (hereinafter sometimes referred to as black-dyed yarn). More specifically, the present invention relates to a flameproof blackout curtain having black-dyed yarn as a constituent fiber, having good light-shielding properties, blackness and flameproofing performance.

[0002]

2. Description of the Related Art Conventionally, a blackout curtain is constituted by, for example, satin weaving using black threads for one of a warp and a weft, or double weaving in which one of two overlapping fabrics is made of black threads. As the constituent fibers, polyester yarns are widely used from the viewpoint of their functionality, but the fact is that the polyester black yarns are limited to yarn-dyed yarns (yarn-dyed yarns).

[0003] However, since such a black dyed yarn is usually dyed in a packaged state, there is a drawback that uneven spots in the yarn and uneven spots in the inner and outer layers of the pan are easily generated.
For this reason, it is necessary to adjust the take-up overfeed rate at the time of forming the package with great care, and it is unavoidable that the cost becomes high.

On the other hand, as a black yarn which is advantageous in terms of cost and process, there is a black-dyed polyester fiber (black-dyed yarn) blended with carbon black. However, the polyester blended with carbon black has a higher melt viscosity than the polyester blended without carbon black, so the drip effect when the fiber is ignited, that is, the polymer around the ignition has a low viscosity due to heat There is a drawback that the effect of preventing the spread of fire by falling together with the ignited portion is insufficient, and the flameproofing performance of the blackout curtain obtained from such a black-colored yarn becomes insufficient (Fiber and Flameproofing, published by Japan Flame Protection Association, page 205).

[0005] Of course, a sufficient drip effect can be obtained simply by reducing the blending amount of carbon black. However, such a black dyed yarn lacks blackness and light-shielding properties and is unsuitable for blackout screens. become.

To solve the problem of the black dyed yarn, Japanese Patent Publication No. 4-44029 discloses a black dyed yarn for blackout curtain in which titanium oxide is used to compensate for a decrease in light-shielding properties due to a decrease in the amount of carbon black. Has been proposed. However,
Although the black curtain obtained by using this black dyed yarn has excellent light-shielding properties, it has a problem that the blackness is reduced and the sharpness is insufficient.

On the other hand, Japanese Patent Publication No. 5-79103 discloses that
A polyester composition has been proposed in which the average particle size, oil absorption, and volatile content of carbon black are specified, and such a composition has improved formability into a film or fiber because the number of coarse particles due to the aggregation of carbon black is reduced. It has been done. However, according to the studies by the present inventors, such requirements alone are not sufficient as a black dyed yarn for blackout curtains, and if carbon black is contained to such an extent that blackness and light-shielding properties are satisfied, flame retardancy is not sufficient. It turned out to be enough.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide a flameproof blackout which solves the above-mentioned drawbacks of the prior art caused by a polyester black yarn. It is in.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, it is not sufficient to only specify the particle size and oil absorption of carbon black. It was found that the drip effect could be improved without lowering the light-shielding property and blackness only when a specific relational expression was satisfied, and as a result of further study,
The present invention has been reached.

That is, according to the present invention, in a blackout curtain containing black-dyed polyester fiber as a constituent fiber, the black-dyed polyester fiber is made of carbon black satisfying the following formulas at the same time: 0.5% based on the fiber weight.
To 2.0% by weight ". Particle size d (nm): 10 ≦ d ≦ 40 Oil absorption H (ml / 100 g): 40 ≦ H ≦ 90 H ≦ 86-1.15 × 10 ⁻² d ² The characteristic points of the present invention are as follows. It is to contain carbon black satisfying the requirements in the polyester. That is, first, the particle diameter of carbon black is 10 to 40 n.
m, preferably 15 to 35 nm. When the particle size is less than 10 nm, the melt viscosity of the polyester is too high to obtain a sufficient drip effect, and the flame resistance of the obtained blackout curtain is insufficient. On the other hand, when the thickness exceeds 40 nm, a satisfactory drip effect can be obtained, but the blackness of the blackout or the light-shielding property becomes insufficient.

Second, the oil absorption of carbon black is 40 to
90 ml / 100 g, preferably 50-80 ml / 10
It must be 0 g. This oil absorption was measured by taking 1.00 g of a dry sample of carbon black on a lithograph having a smooth surface, dripping dibutyl phthalate little by little, and kneading well with a stainless steel spatula. It is determined by measuring the amount of dibutyl phthalate and converting it to the amount of dibutyl phthalate (ml) per 100 g of carbon black. When the oil absorption exceeds 90 ml / 100 g, such carbon black particles have a special three-dimensional structure. Therefore, when incorporated in polyester, the melt viscosity of the carbon black greatly increases. The effect is insufficient and the flame resistance of the blackout curtain is reduced.
On the other hand, carbon black having an oil absorption of less than 40 ml / 100 g has disadvantages such as insufficient blackness and light-shielding properties due to an increased content of coarse particles due to aggregation.

Thirdly, the relationship between the particle diameter of the carbon black and the oil absorption satisfies the relationship represented by the equation, which is necessary to achieve both the flameproofing performance of the blackout curtain, the blackness, and the light-shielding property. Is necessary for If the oil absorption is large without satisfying the formula, the melt viscosity of the polyester will be greatly increased, and the flameproofing performance will be insufficient.

The production method of the carbon black in the present invention is not particularly limited as long as the above three requirements are simultaneously satisfied. Known methods for producing carbon black include, for example, a furnace-type incomplete combustion method, a contact-type incomplete combustion method, and a pyrolysis method. this house,
As a method for producing carbon black in the present invention,
The furnace type incomplete combustion method is preferred from the viewpoint of suppressing the formation of functional groups on the carbon black surface and suppressing the formation of the three-dimensional structure of the carbon black particles.

In order to obtain carbon black satisfying the particle diameter and oil absorption in the present invention, in the above furnace type incomplete combustion method, for example, a spray angle of an oil spray nozzle using a raw oil having a small aromatic component is used. , And the reaction temperature should be set higher. Of course, the present invention is not limited to these methods.

The content of the carbon black in the black dyed yarn must be 0.5 to 2% by weight, preferably 0.8 to 1.5% by weight, based on the weight of the fiber. When the content is less than 0.5% by weight, sufficient blackness cannot be obtained, and the light shielding performance of the blackout curtain becomes insufficient. 2% by weight
When the carbon black exceeds the above, not only does the increase in blackness level off, but even if carbon black that simultaneously satisfies the above formulas is used, the flameproofing performance of the blackout curtain becomes insufficient due to the increase in melt viscosity. Should be avoided.

In the present invention, the polyester blended with the carbon black is intended to be a polyester having ethylene terephthalate as a main repeating unit, but a small amount of a third component (for example, 20 mol% or less, preferably not more than 20 mol% based on a terephthalic acid component). May be 10 mol% or less). Among them, the ester-forming functional group is 2
Those obtained by copolymerizing phosphorus compounds having two or more phosphorus compounds are more preferable because the flameproofing performance is further improved. If the intrinsic viscosity of the polyester is too high, the drip effect may be reduced and the flameproofing performance may be insufficient.
Is preferable.

It is not necessary to employ a special method for blending the above carbon black into the polyester fiber. For example, a method of adding the carbon black in a polyester polymerization step, a method of forming a master pellet and kneading it with a base polyester,
A method in which a liquid colorant obtained by previously mixing carbon black and a liquid polyester is injected into a molten polyester stream just before spinning while being measured by a gear pump or the like, and then statically or dynamically kneaded and dispersed. Among them, the method using master pellets can be said to be the most common in consideration of the contamination of the spinning device, the handling property, the cost, and the like. In any case, after blending, fiberization can be performed by a known melt spinning method. The fiber cross-sectional shape at that time is arbitrary, and may be any of a round cross-section fiber, a modified cross-section fiber, and a hollow fiber.

Further, in the present invention, in addition to the above carbon black, a black matting polyester, an antistatic agent, a fluorescent whitening agent, a hygroscopic agent, an ultraviolet absorber, a light stabilizer, an antibacterial agent, etc. A modifier and a function-imparting agent may be contained within a range that does not impair the effects of the present invention.

The black dyed polyester fiber thus obtained is used as a filament, a staple fiber or a false twisted yarn, and woven or knitted by itself or in combination with other fibers by a conventionally known method to form a black screen. It can be used as material. For example, use a black spun yarn for the weft, and a satin weave using a normal white polyester drawn yarn for the warp, or a double weave with the black spun yarn on one side, and use it as a material for blackout curtains. I just need. Here, the weaving density varies depending on the total denier of the black dyed yarn to be used, but it is preferable that the cover factor represented by the following equation be within the range of 20 to 35. Cover factor = (density of warp) / (cotton count of warp)
^0.5 + (density of the weft) / (cotton count of weft) ^0.5 where density is the number of black dope Chakuitojo per fabric 1 inch wide. Next, the obtained raw material is further subjected to a dyeing treatment and a flameproofing treatment, if necessary, to form a blackout curtain, for example, sewn on a curtain or the like.

[0020]

The black dyed yarn used in the blackout curtain of the present invention uses carbon black having a smaller oil absorption than conventional dyed yarns.
Amount that satisfies blackness and light-shielding properties Even if blended in polyester, the increase in melt viscosity of polyester is small, and even if a blackout curtain is ignited, the fibers in the vicinity are easily melted and dropped. is there.

Therefore, according to the present invention, it is possible to provide a black curtain having blackness and flameproofness which is comparable to that of the conventional black dyeing screens by yarn dyeing at a lower cost.

[0022]

The present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto. In addition, each characteristic value in an Example was measured by the following method.

(Blackness) Knitted black yarn is knitted on a sock knitted fabric, and a Macbeth color measuring device "Macbeth C" is used.
"OLOR-EYE", a field of view of 2 degrees was used, and measurement was performed at a wavelength of 360 to 740 nm using a D65 light source to obtain an L ^* value. In addition, the thing whose L ^* is 20 or less is pass.

(Light-shielding properties)
It was measured in accordance with SL1055 and expressed as a light blocking ratio.
In addition, those with a light-shielding rate of 99.99% or more pass. Shading ratio (%) = (1−i / i ₀ ) × 100 where i: illuminance (lux) when sample is attached i ₀ : illuminance (lux) when sample is not attached (flameproof) after staining Was measured in accordance with the 45 ° coil method defined by JIS, and the number of flame contact times (1
(Average value of 0 tests). In addition, three or more times pass.

Example 1 A master chip obtained by blending 43 parts by weight of carbon black having a particle diameter and an oil absorption amount shown in Table 1 with 100 parts by weight of polyethylene terephthalate having an intrinsic viscosity of 0.65 was used as the polyethylene chip. The terephthalate chip was mixed with the carbon black content in the fiber so as to have the ratio shown in Table 1, heated and melted at 290 ° C., discharged from a spinneret having 30 discharge holes, and then at a speed of 1100 m / min. I took it. The obtained unstretched yarn is stretched 3 times according to a conventional method, and 150 denier /
A 30-filament black dyed polyester fiber was obtained.

The above-mentioned polyethylene terephthalate to which 0.3% by weight of titanium dioxide was added at the time of the polycondensation reaction was spun and drawn without adding the above-mentioned carbon black to obtain white polyester fibers (150 denier / 150
48 filaments).

Using these polyester fibers, a black-dyed polyester fiber 142/25 mm for the warp, a white polyester fiber 87/25 mm for the weft, and a weave fabric of satin weave, the white polyester fiber of the obtained fabric is obtained. Was dyed red, and this was used as a blackout cloth. As a result, the light-shielding property was substantially the same as that of the conventional black dyed yarn, and the flameproofing performance was also good.

[Examples 2 to 6, Comparative Examples 1 to 6] Example 1
In Example 1, a blackout curtain was obtained in the same manner as in Example 1 except that the particle size, oil absorption and content of carbon black were changed as shown in Table 1. The results are summarized in Table 1.

[0029]

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A47H 23/08 A62C 2/00 D01F 6/92 304 D03D 1/00

Claims (1)

(57) [Claims] 1. A black curtain comprising a black-dyed polyester fiber as a constituent fiber, wherein the black-dyed polyester fiber is
A flameproof blackout curtain containing 0.5 to 2.0% by weight of carbon black, which satisfies the following formulas at the same time, based on the weight of the fiber. Particle size d (nm): 10 ≦ d ≦ 40 Oil absorption H (ml / 100 g): 40 ≦ H ≦ 90 H ≦ 86-1.15 × 10 ⁻² d ²