JPH08322707A - Flame-proof blackout curtain - Google Patents

Abstract

PURPOSE: To provide a blackout curtain containing polyester fibers having original black color as constitutive fibers and which are highly light-proof, dark and flame-proof. CONSTITUTION: This flame-proof blackout curtain comprises polyester fibers containing a 0.5 to 2.0wt.%, carbon black which is 10 to 40nm in average particle size, 40 to 90ml/100g in oil absorption, and H<=86-1.15×10<-2> d<2> as constitutive fibers.

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 black dyed polyester fiber (hereinafter sometimes referred to as black dyed yarn) as a constituent fiber. More specifically, the present invention relates to a flameproof black screen which has good blackness, blackness and flameproofing properties, and which contains black dyed yarn as a constituent fiber.

[0002]

2. Description of the Related Art Conventionally, a curtain is made of, for example, a satin weave in which a black thread is used as one of warp threads or weft threads, or a double weave in which one of two overlapping fabrics is made of a black thread. Polyester yarn is widely used as the constituent fiber from the viewpoint of its functionality, but the fact is that the polyester black yarn is limited to yarn-dyed yarn (pre-dyed yarn).

However, such a yarn-dyed black yarn is usually dyed in a packaged state, so that it has a drawback that yarn shrinkage unevenness and dye unevenness in the inner and outer layers of the pun are likely to occur.
For this reason, the winding overfeed rate at the time of forming the package needs to be adjusted 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 black-dyed polyester fiber (black-dyed yarn) containing carbon black. However, the polyester blended with carbon black has a higher melt viscosity than the polyester not blended with 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. It has the drawback that it will fall together with the ignited part and fall off with the effect of preventing fire spread, and the flameproof performance of the black curtain obtained from such black-dyed yarn will be insufficient (fiber and flameproof page 205 issued by the Japan Flameproof Association).

Of course, it is possible to obtain a sufficient drip effect by simply reducing the amount of carbon black compounded, but on the other hand, such a black-dyed yarn is unsuitable for dark curtains due to its lack of blackness and light-shielding properties. become.

[0006] In order to solve the problem of the black-dyed black yarn, Japanese Patent Publication No. 4-44029 discloses a black-dyed black yarn for a dark curtain in which the decrease of the light-shielding property due to the decrease of the carbon black compounding amount is compensated by the titanium oxide compounding. Is proposed. However,
Although the black curtain obtained by using this black-dyed yarn is excellent in light-shielding property, it has a problem that the blackness is lowered and the vividness is insufficient.

On the other hand, Japanese Patent Publication No. 5-79103 discloses that
A polyester composition that defines the average particle size and oil absorption of carbon black, and its volatile content has been proposed.Since such composition has few coarse particles due to aggregation of carbon black, it improves moldability into a film or fiber. It is said that. However, according to the study by the present inventors, such requirements alone are not sufficient as a black-dyed black yarn for a curtain, and if carbon black is contained to such an extent that the blackness and the light-shielding property are satisfied, the flameproof property becomes unsatisfactory. Turned out to be enough.

[0008]

SUMMARY OF THE INVENTION The present invention has been made against the background of the above-mentioned prior art, and an object thereof is to provide a flameproof blackout curtain which solves the above-mentioned drawbacks of the prior art due to polyester black dyed yarn. Especially.

[0009]

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

That is, according to the present invention, "in a curtain containing black-dyed polyester fiber as a constituent fiber, the black-dyed polyester fiber is carbon black which simultaneously satisfies the following expressions (1) to (5) based on the weight of the fiber.
The flame-retardant blackout curtain is provided. Particle diameter d (nm): 10 ≤ d ≤ 40 Oil absorption H (ml / 100g): 40 ≤ H ≤ 90 H ≤ 86-1.15 x 10 ^-2 d ² The characteristic points of the present invention are as follows. The purpose is to include carbon black satisfying the requirements in polyester. That is, firstly, the particle size of carbon black is 10 to 40 n.
m, preferably 15 to 35 nm. When the particle diameter is less than 10 nm, the melt viscosity of the polyester is excessively increased and a sufficient drip effect cannot be obtained, and the flameproof property of the obtained dark curtain becomes insufficient. On the other hand, when the thickness exceeds 40 nm, a satisfactory drip effect can be obtained, but the blackness of the dark curtain or the light shielding property becomes insufficient.

Secondly, the oil absorption of carbon black is 40 to
90 ml / 100 g, preferably 50-80 ml / 10
Must be 0 g. This oil absorption amount is obtained by taking 1.00 g of a dry carbon black sample on a lithographic stone with a smooth surface, dropping dibutyl phthalate little by little, and kneading well with a stainless spatula to form the sample and dibutyl phthalate into a single spherical shape. It is determined by measuring the amount of dibutyl phthalate and converting it to the amount (ml) of dibutyl phthalate per 100 g of carbon black. When the oil absorption exceeds 90 ml / 100 g, the particles of such carbon black form a special three-dimensional structure. Therefore, when blended in polyester, the melt viscosity is greatly increased. The effect is insufficient and the flameproof property 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 property because the content of coarse particles due to aggregation increases.

Thirdly, the fact that the relationship expressed by the formula is satisfied between the particle size of carbon black and the oil absorption amount is to satisfy both the flameproof performance of the blackout curtain, the blackness and the light shielding property. Needed for. If the oil absorption amount is large and does not satisfy the formula, the melt viscosity of the polyester is greatly increased, resulting in insufficient flameproof performance.

The carbon black in the present invention is not particularly limited in its production method as long as it simultaneously satisfies the above three requirements. Known methods for producing carbon black include furnace-type incomplete combustion method, contact-type incomplete combustion method, and thermal decomposition method. this house,
As a method for producing carbon black in the present invention,
The furnace type incomplete combustion method is preferable because it suppresses the formation of functional groups on the surface of the carbon black and suppresses the formation of the three-dimensional structure of the carbon black particles.

In order to obtain carbon black satisfying the particle size and oil absorption in the present invention, in the furnace type incomplete combustion method, for example, a raw material oil having a small amount of aromatic components is used, and the spray angle of an oil spray nozzle is used. However, the method is not limited to these methods.

The content of the carbon black in the black dyed yarn should be 0.5 to 2% by weight, preferably 0.8 to 1.5% by weight, based on the weight of the fiber. If the content is less than 0.5% by weight, sufficient blackness cannot be obtained and the light-shielding performance of the dark curtain becomes insufficient. On the other hand, 2% by weight
If it exceeds, not only the increase in the blackness leveled off, but even if carbon black satisfying the above formulas is simultaneously used, the flameproof performance of the blackout curtain becomes insufficient due to the increase in the melt viscosity. It should be avoided.

In the present invention, the above-mentioned carbon black-containing polyester is intended for a polyester having ethylene terephthalate as a main repeating unit, but a small amount of the third component (for example, 20 mol% or less based on the terephthalic acid component, preferably). May be 10 mol% or less). Among them, the ester-forming functional group is 2
Copolymers of individual phosphorus compounds are more preferable because the flameproof performance is further improved. If the intrinsic viscosity of the polyester is too high, the drip effect may decrease and the flameproof performance may become insufficient, so 0.6 to 0.8.
Is preferred.

It is not necessary to employ a special method for blending the above-mentioned carbon black in the polyester fiber. For example, a method of adding in the polyester polymerization step, a method of master pelletizing and then kneading with the base polyester,
Examples include a method in which a liquid colorant obtained by mixing carbon black and a liquid polyester in advance is added into a molten polyester stream immediately 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 general method in consideration of contamination of the spinning apparatus, handleability, cost and the like. In any of the methods, the fibers can be formed into fibers by a known melt spinning method after blending. The fiber cross-sectional shape at that time is arbitrary, and may be any of round cross-section fiber, irregular cross-section fiber, hollow fiber and the like.

In the present invention, in addition to the above carbon black, a matting agent, an antistatic agent, a fluorescent whitening agent, a hygroscopic agent, an ultraviolet absorber, a light stabilizer, an antibacterial agent, etc. are contained in the black dyed polyester fiber. A modifier or a functionality-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 a filament, a short fiber or a false twisted yarn, which is used alone or in combination with other fibers and woven or knitted by a conventionally known method to produce a blackout curtain. It can be used as a raw material. For example, a black weft yarn is used as the weft yarn, and a normal white polyester stretched yarn is used as the warp yarn in a satin weave, or a double weave in which the black mottled yarn is arranged on one side to provide a raw material for the curtain. Good. Here, the weaving density varies depending on the total number of denier of the black dyed yarn to be used, but it is preferable that the cover factor represented by the following formula is within the range of 20 to 35. Cover factor = (warp density) / (warp cotton count)
^0.5 + (weft density) / (weft cotton count) ^0.5 However, the density is the number of black-dyed yarns per inch of fabric. Then, the obtained raw fabric is further subjected to dyeing treatment and flameproofing treatment, if necessary, to form a dark curtain, and is sewn to, for example, a curtain or the like.

[0020]

The operation and effect of the present invention: The black dyed yarn used in the dark curtain of the present invention uses carbon black having a smaller oil absorption than the conventional dyed yarn, so that even if the particle size is small,
An amount that can satisfy the blackness and light-shielding properties Even if blended in polyester, the melt viscosity of the polyester does not increase, and even if the dark curtain is ignited, the fibers in the vicinity easily melt and fall off. is there.

Therefore, according to the present invention, it is possible to provide at a lower cost a dark curtain having a blackness and flameproof property that are comparable to those of the conventional dark curtain made by yarn dyeing.

[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. The characteristic values in the examples were measured by the following methods.

(Blackness) A black dyed yarn is knitted on a sock knitted fabric, and a color measuring device "Macbeth C" manufactured by Macbeth Co.
"LOR-EYE" was used to measure the light intensity at a wavelength of 360 to 740 nm using a D65 light source with a visual field of 2 degrees to obtain the L ^* value. Those having L ^* of 20 or less are acceptable.

(Light-shielding property) The dark curtain sample after dyeing was subjected to JI
It measured based on SL1055, and was represented by the shading rate.
Those having a light blocking rate of 99.99% or more are acceptable. Light-shielding rate (%) = (1−i / i ₀ ) × 100 where i: illuminance (lux) when the sample is attached i ₀ : illuminance (lux) when the sample is not attached (flameproof) after dyeing The dark curtain sample was measured according to the 45 ° coil method specified in JIS, and the number of flame contact (1
It is represented by the average value of 0 tests). It should be noted that three or more times pass.

[Example 1] A master chip obtained by mixing 43 parts by weight of carbon black having the particle size and oil absorption shown in Table 1 with 100 parts by weight of polyethylene terephthalate having an intrinsic viscosity of 0.65 was prepared by using the above polyethylene. The terephthalate chips were mixed with the carbon black content in the fibers in the proportions shown in Table 1, then heated and melted at 290 ° C. and discharged from a spinneret having 30 discharge holes, and then at a speed of 1100 m / min. I took it. The obtained unstretched yarn was stretched 3 times according to a conventional method to obtain 150 denier /
A 30-filament black-dyed polyester fiber was obtained.

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

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 satin weave woven fabric were prepared. Was dyed red and this was used as a cloth for a curtain. As a result, it exhibited light-shielding properties comparable to those of the conventional black dyed yarn, and had good flameproof performance.

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

[0029]

[Table 1]

Claims (1)

[Claims] 1. A black curtain containing black-dyed polyester fibers as constituent fibers, wherein the black-dyed polyester fibers are
A flameproof black screen containing 0.5 to 2.0% by weight of carbon black satisfying the following expressions at the same time based on the weight of fiber. Particle diameter d (nm): 10 ≦ d ≦ 40 Oil absorption amount H (ml / 100 g): 40 ≦ H ≦ 90 H ≦ 86-1.15 × 10 ^-2 d ²