JPH0571012A - Acrylic synthetic fiber - Google Patents

Abstract

(57) [Summary] (Modified) [Constitution] 0.05 to 10 parts by weight of titanium black and carbon black based on 100 parts by weight of acrylic synthetic fiber at a specific ratio of -1/99 to 50/50 (weight ratio). Partly contained to make a light-absorbing and heat-storing acrylic synthetic fiber. [Effect] It shows excellent heat storage property by adding a small amount of heat storage component, so that it can be mixed with other materials without deteriorating the physical properties of the system, and clothing such as sweater, jersey or electric carpet, It has an excellent effect when applied to interior products such as kotatsu mats.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-absorbing and heat-accumulating acryl-based synthetic fiber suitable for cold weather clothing, leisure clothing or interior goods such as curtains used in cold regions.

[0002]

2. Description of the Related Art Conventionally, in order to impart heat-retaining properties to winter clothing, it has been practiced to use hollow fibers utilizing the heat insulating property of air and to form a three-layer structure in which batting is inserted between the outer material and the inner material. Although it has been known, it has a defect that the thickness of the cloth increases and it becomes heavy and bulky. In order to eliminate this, the cloth is coated with aluminum or titanium to reduce the heat released from the human body to escape to the outside, and the cloth is made lighter. There are problems such as rise and interface peeling due to insufficient adhesion between the film formed by coating and the cloth.

Recently, a method of positively utilizing sunlight by incorporating a carbide of a transition metal belonging to Group 4 of the periodic table has been proposed (JP-A-1-132816), but a practical heat storage property. It is necessary to increase the amount added to obtain
Therefore, it has been necessary to use sheath-core type fibers in which the metal carbides are contained in the center of the yarn in order to reduce the physical properties of the yarn, damage guides or the like in the manufacturing process, or as a countermeasure.

In order to solve this, an amide oxime group or a carboxyl group is introduced into an acrylic fiber, copper ion,
A method of treating with silver ions or molybdenum ions has been proposed (JP-A-3-97959), but it was not satisfactory in terms of heat storage effect and durability.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of conventional heat insulating fibers and to provide excellent light absorbing heat storage fibers.

[0006]

The gist of the present invention is that titanium black (A) and carbon black (B) are A / B = 1.
/ 99 to 50/50 (weight ratio) acrylic synthetic fiber 1
The light-absorbing and heat-accumulating acrylic synthetic fiber is contained in an amount of 0.05 to 10 parts by weight with respect to 00 parts by weight.

Titanium black used in the present invention is Ti
An ordinary carbon black such as furnace black, channel black, thermal black or acetylene black is used as the carbon black (hereinafter abbreviated as CB) represented by the chemical formula of O (hereinafter abbreviated as TiO).
The average particle diameter of these additive particles is preferably 2.0 μm or less, and when it exceeds 2.0 μm, problems such as filterability, passage through the stock solution such as clogging of the spinneret, and yarn breakage in the spinning process are produced. Is likely to occur and is not preferable.

The weight mixing ratio of TiO and CB is 1: 99-5.
At 0:50, if TiO is less than 1 with respect to CB99, the efficiency of light absorption and heat storage decreases, which is not preferable.
When the TiO content exceeds 50 with respect to 50, the improvement in the light absorption and heat storage capacity saturates, which is not preferable in terms of cost. The addition amount of these additives is 0.05 to 10 parts by weight with respect to 100 parts by weight of the acrylic synthetic fiber, if it is less than 0.05 parts by weight, the light absorption heat storage performance cannot be sufficiently imparted.
Further, if it exceeds 10 parts by weight, the spinnability is deteriorated and the physical properties of the yarn are also deteriorated, which is not preferable.

It is surprising that practically even less than 1 part by weight exhibits excellent effects. The acrylic synthetic fiber used in the present invention is not particularly limited as long as it contains 50% by weight or more of acrylonitrile, but if necessary, unsaturated such as acrylic acid, methacrylic acid, maleic acid or itaconic acid. Carboxylic acids and salts thereof, methacrylic acid esters such as methyl acrylate and butyl acrylate, methyl vinyl ketones, vinyl esters such as vinyl acetate, vinyl esters such as methyl vinyl ether, acrylamide and its alkyl-substituted products, vinyl Unsaturated sulfonic acids such as sulfonic acid and methallyl sulfonic acid, and salts thereof, styrene such as styrene and α-methylstyrene, and their alkyl or halogen-substituted compounds, allyl alcohol and its esters or ethers, vinyl chloride, vinylidene chloride, etc. Vinyl halides or vinylides of It is also possible to include other copolymerizable unsaturated vinyl compounds such like.

The fiber of the present invention can be produced by a conventional wet, dry or dry-wet process for producing an acrylic synthetic fiber, and may contain various additives such as a light resistance stabilizer and an antioxidant. .. Further, since the physical properties of the yarn are not different from those of ordinary acrylic synthetic fibers, it is possible to apply a high bulk treatment as required and use the fibers as a highly shrinkable fiber.

Since the fiber of the present invention has an extremely high light absorption and heat storage performance, it can be used in combination with other fibers such as blended fiber and blended fiber. Sweaters, vests, jerseys, cardigans, trainers, shirts, socks, tights, gloves. , Clothing such as hats and swimwear, miscellaneous goods such as supporters, throwers, and quilt covers, interior products such as kotatsu futon side land, kotatsu mats, curtains, heat insulating materials for agriculture, etc. You can

[0012]

EXAMPLES The effects of the present invention will be specifically described below with reference to examples.

Example 1 An acrylic polymer containing 93.1% by weight of acrylonitrile and 6.9% by weight of vinyl acetate was dissolved in a dimethylacetamide solvent so as to be 25% by weight, and TiO and CB were added thereto.
(Furnace black), zirconium carbide (Zr
C) was added as shown in Table 1 to prepare spinning stock solutions,
From a nozzle having a nozzle hole diameter of 0.07 mm and a number of holes of 20,000 holes, spinning into a 50% by weight dimethylacetamide aqueous solution, desolvation in hot water, stretching 5 times, and drying,
Wet heat relaxation and cutting were performed to obtain 3d × 51 mm acrylic synthetic fibers. In addition, spinning these fibers 1
/ 52 No. spun yarn, 24G Tenjiku knitted fabric (No. 1
10) was produced.

The knitted fabric sample (No.
1-10) and a blank knitted fabric obtained from a normal acrylic synthetic fiber containing no TiO, etc., were placed in a constant temperature and humidity chamber of 0 ° C. and 40% for 2 hours, and then adjusted to a distance of 1 m. Then, simulated sunlight was irradiated with a 500 W photographic reflex lamp, and after 20 minutes, the temperature on the back side of each knitted fabric which was not exposed to light was measured. The results are shown in Table 1. From this, it is recognized that the knitted fabric sample obtained from the light absorbing and heat storage acrylic fiber of the present invention has a higher efficiency of converting sunlight into heat than the blank knitted fabric.

[0015]

[Table 1]

Example 2 An acrylic polymer containing 91.2% by weight of acrylonitrile, 8.0% by weight of methyl acrylate and 0.8% by weight of sodium methallylsulfonate was dissolved in a dimethylformamide solvent.
The solution was dissolved to be 6% by weight, and 0.2 parts by weight of TiO and 1.5 parts by weight of CB (acetylene black) were added to 100 parts by weight of the acrylic polymer to prepare a spinning dope, and the nozzle hole diameter was 0. It was spun into a 60% by weight dimethylformamide aqueous solution from a nozzle with a diameter of 0.06 mm and a hole number of 30,000, desolvated in hot water, stretched 6 times, and then dried, moistened with heat, and cut to obtain a 2d x 51 mm acrylic resin. A synthetic fiber was obtained.

Further, the fiber was spun to prepare a 24G plain knitted fabric (No. 11). On the other hand, 2d × 51 mm acrylic synthetic fiber was obtained in the same manner as above except that TiO and CB were not added.
% (Vs fiber) and dibasic sodium phosphate 20% (vs fiber),
After boiling in an aqueous solution with a bath ratio of 1:30 for 90 minutes, it was washed with water, further treated with an aqueous solution of 5% copper sulfate (to fiber) for 45 minutes, and washed with hot water at 75 ° C. It dried and copper 0.23 mmol / g containing fiber was obtained. Spin this 2
4G of Tenjiku knitted fabric (No. 12) was obtained. Table 2 shows the results of measuring these heat storage properties in the same manner as in Example 1. From this, it is understood that the light absorbing and heat storing acrylic fiber of the present invention is excellent.

[0018]

[Table 2]

Example 3 The acrylic polymer of Example 2 was dissolved in dimethylformamide to 30%, and TiO 0.3% and CB were added.
(Channel black) 3.5% was added to prepare a spinning dope. After heating this stock solution to 130 ° C., it is passed through a spinneret with 850 holes and an orifice hole diameter of 0.2 mmΦ to 215 ° C.
It was discharged into the inert gas of No. 1 to obtain an undrawn yarn. This is stretched 3.75 times in hot water, further washed in hot water, applied with an oil agent, dried at a relative humidity of 40% and a temperature of 150 ° C., and subjected to a relaxation treatment, and cut into 2d × 38 mm An acrylic fiber (A) was obtained.

2d × 38 mm raw cotton (B) was obtained in the same manner as above except that it and TiO and CB were not added.
As shown in Table 3, the above raw cotton was mixed and spun to prepare 24G plain knitted fabric knitted fabric samples (Nos. 13 to 16). Table 3 shows the results of measuring these heat storage properties in the same manner as in Example 1.
From this, it is understood that the light absorbing acrylic fiber of the present invention is excellent.

[0021]

[Table 3]

Example 4 Knitted fabric sample No. 1 of Example 1 4 and 20 blank knitted fabrics
After adjusting by putting it in a thermo-hygrostat at 40 ° C and 40% for 2 hours, irradiate infrared rays with a 500 W infrared lamp for kotatsu at a distance of 1 m, and after 15 minutes, the back side of the knitted fabric not exposed to light. Was measured. The results are shown in Table 4. From this, it is understood that the light absorbing and heat storing acrylic fiber of the present invention is also effective for infrared light.

[0023]

[Table 4]

[0024]

EFFECT OF THE INVENTION The light-absorbing heat-storing acrylic synthetic fiber of the present invention exhibits extremely excellent heat-storing property by adding a small amount of heat-storing component as described above, and therefore, it does not deteriorate the physical properties of the yarn and other It can be mixed with other materials and exerts excellent effects when applied to clothing such as sweaters and jerseys, electric carpets, and interior goods such as kotatsu mats.

Front Page Continuation (72) Inventor Toshihiko Shibata 4-160 Sunadabashi, Higashi-ku, Nagoya, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Laboratory

Claims (1)

[Claims] 1. A / B = 1/99 to 50/50 (weight ratio) of titanium black (A) and carbon black (B).
0.05 to 1 per 100 parts by weight of acrylic synthetic fiber
A light-absorbing and heat-accumulating acrylic synthetic fiber containing 0 part by weight.