JPH03193956A - Mixedly knit and woven fabric of acrylic fiber and aromatic polyester fiber - Google Patents

Abstract

PURPOSE:To obtain the title mixedly knit or woven fabric dyeable with disperse dye and cationic dye, having excellent coloring properties and soft handle by mixedly knitting or weaving fiber of specific acrylonitrile-based copolymer and aromatic polyester fiber. CONSTITUTION:(A) A polymer unit shown by formula I is reacted with 0.4-1.5mol% polymer unit shown by formula II (M is H or cation) to give a copolymer having 600-1,500 degree of polymerization which is processed to give fiber having <=10% elongation at 260 deg.C. The fiber and (B) aromatic polyester fiber such as polyethylene terephthalate are mixedly knitted or woven to give the objective knit or woven fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to inter-knitted and interwoven fabrics of acrylic fibers and aromatic polyester fibers.

More specifically, the present invention relates to inter-knitted and interwoven fabrics of acrylic fibers and aromatic polyester fibers that have excellent heat-resistant dimensional stability, and which can be dyed at high temperatures under the usual conditions of the latter.

(Conventional technology) Acrylic fibers have traditionally been widely used for clothing such as knitwear and jersey, interior decoration such as carpets and curtains, and bedding such as blankets and sheets due to their vivid coloring and flexible texture. It is being Among these, in the case of clothing, if it is knitted or woven and then dyed, it will sag due to heat, and
Because the dimensional stability and texture were poor, yarn dyeing was necessary.

In order to improve this drawback, the following proposals have been made in the past.

JP-A No. 47-43557 discloses that the amount of composite fibers contained in acrylic synthetic fibers is 20 to 50% of the total amount.
The content of polyester synthetic fiber is 2.
5 to 60%, and the shrinkage ratio of the polyester synthetic fiber to the acrylic synthetic fiber is 1:1 to 4. Piece-dyed blended, knitted, and mixed fabrics are made of acrylic synthetic fiber and polyester synthetic fiber. The manufacturing method is disclosed. The same publication also discloses using a carrier that causes little cross-contamination and setting the dyeing temperature to 98'' to 105°C.

JP-A-49-1865 discloses composite fiber components of 30~
Using an acrylic spun yarn (A) consisting of 70% and 70% to 30% non-composite fiber components, the blending rate of polyester long fiber processed yarn (B) in the product is 20% to 55%, and (B)
Assuming that the shrinkage ratio of (A) and (A) is 1 = 3 to 5, (A) and (
B) is knitted into an interlaced double knit, and then dyed at a temperature of 96°C to 105°C using a carrier with little mutual contamination.
A piece-dyed double-knit fabric made of acrylic spun yarn and polyester long-fiber processed yarn, which is piece-dyed and finished with an overfeed rate of 18 to 25% in the warp direction in the extrusion process after dyeing. A manufacturing method is disclosed.

As mentioned above, conventional acrylic fibers and polyester fibers that can be piece-dyed by blending, interlacing, and interwoven fabrics are those in which a part of acrylic fiber is mixed as a composite fiber and dyed at low temperature using a carrier. Ta.

On the other hand, JP-A No. 58-13739 discloses a cross-knitted fabric of polyester fiber and acrylic fiber, which is substantially made of a polyethylene terephthalate homopolymer and can be dyed under normal pressure with a disperse dye. .

The above polyester fiber has an initial modulus of 55 g/d or more at 30°C, and a peak temperature (T ma ) of mechanical loss tangent (tan δ) at a measurement frequency of 110 Hz.
x) is 105°C or less and the peak value of tan δ [(t
an δ) maxl is greater than 0.135 and/or the initial modulus at 30°C is 55 g/d or more and Tmax(”
O) and (tanδ)IIlax (tan &'
)taax≧(Tmax−105) After spinning at a spinning speed of
Fibers that have been heat-treated by dry heat at a temperature of 220°C to 300°C and/or that have been spun at a spinning speed of 4,000 m/min or more and then heat-treated by dry heat at a temperature of 220°C to 300°C. Later, it is disclosed that the fiber has been subjected to bulk processing by a conventional method.

JP-A No. 58-87340 includes the above-mentioned JP-A-58-87340.
A mixed knit/mixed fabric of polyester fibers, acrylic fibers, and animal hair fibers having substantially the same properties as the polyester fibers disclosed in Japanese Patent No. 13739 is disclosed.

As mentioned above, polyester fibers that are used for knitting and interweaving with acrylic fibers and can be piece-dyed at low temperatures without using a carrier are special fibers that are produced by high-speed spinning and post-spinning heat treatment. Atsu tko.

(Problems to be Solved by the Invention) An object of the present invention is to provide a knitted or mixed fabric of acrylic fibers and aromatic polyester fibers.

Another object of the present invention is to combine aromatic polyester fibers and
The object of the present invention is to provide a new acrylic fiber material that can be piece-dyed as a mixed fabric under the usual dyeing conditions for aromatic polyester fibers.

Still another object of the present invention is to provide a novel interwoven/woven fabric of acrylic fibers and aromatic polyester fibers that has excellent heat-resistant dimensional stability and a flexible texture.

Further objects and advantages of the present invention will become apparent from the description below.

(Means and effects for solving the problems) According to the present invention, the above objects and advantages of the present invention are as follows: (A), (a) The following formula (1) % formula % (1) consisting essentially of a polymerized unit represented by the following formula (2) (% formula %), where M is a hydrogen atom or a -equivalent cation; (b) polymerized with the polymerized unit (1) above; From an acrylonitrile copolymer, in which the polymerized unit (2) accounts for 0.4 to 1.5 mol% of the total of units (2), and (c) the degree of polymerization is in the range of 600 to 1.500. Become, and (B)
In the relationship between temperature and elongation rate measured under elevated temperature, 2
This is achieved by inter-knitting or interwoven fabrics of acrylic fibers and aromatic polyester fibers, which are characterized by containing acrylic fibers and have an elongation rate of 10% or less at 60°C.

In the present invention, the acrylic fibers used for inter-knitting and inter-woven fabrics with aromatic polyester fibers are subject to the requirements (A) for specifying the polymer that forms them and the requirement for specifying their elongation rate at high temperatures, as described above. (B).

Regarding requirement (A), the polymer contains polymerized units of the above formula (1) derived from acrylonitrile and 2-acrylamide-
It consists essentially of polymerized units of the above formula (2) derived from 2-methylpropanesulfonic acid (hereinafter abbreviated as AMPS) or a salt thereof.

The ratio of polymerized units (1) and polymerized units (2) is 0.4 to 1.5 mol% of polymerized units (2) (99.6 to 1.5 mol% of polymerized units (1)) based on the total of both polymerized units. 98.5 mol%). The polymerized units (2) preferably account for 0.6 to 1.2 mol% (99.4 to 98.8 mol% of the polymerized units (1)) on the same basis. Polymerization unit (2)
If the ratio is less than 0.4 mol%, gelation tends to occur during the polymerization process, and deep color dyeing becomes difficult due to insufficient dyeing seat. Moreover, if it exceeds 1.5 mol %, the heat resistance properties described below will deteriorate.

Furthermore, regarding requirement (A), the above polymer has a degree of polymerization of 600.
~l, 500. The preferred degree of polymerization is 800.
~1.100.

If it is less than 600, the strength as a normal acrylic fiber cannot be obtained, and if it exceeds 1,500, gelation tends to occur during the polymerization process, and the viscosity is too high for normal wet spinning.

In the present invention, the above-mentioned acrylic fiber used for inter-knitting/inter-woven fabric with aromatic polyester fiber has polymerized units (1) and polymerized units (2) as specified in requirement (A). Based on the total of 0.4 polymerized units (2)
It is contained in a proportion of ~1.5 mol%. According to the research of the present inventors, it has been found that even if a small amount of other polymerized units (3) is contained under the conditions that the above ratio of polymerized units (1) and polymerized units (2) is maintained, the above-mentioned purpose of the present invention can be achieved. It is clear that the benefits remain.

That is, the acrylonitrile copolymer containing such other polymerized units (3) meets the following requirement (A) instead of requirement (A).
'): (A') '(a') The polymerized unit of the above formula (1), the polymerized unit of the above formula (2), and the polymerized unit of the above formula (2) derived from a monomer copolymerizable with acrylonitrile (b') The proportion of the above polymerized unit (2) is 0.4 to 0.4 to the total of the above polymerized unit (1) and the polymerized unit (2). and (C) the degree of polymerization is 6.
In the range of 00 to 1.500, satisfies the following.

Regarding requirement (A″), polymerized unit (1) and polymerized unit (2)
The ratio of polymerized units (2) to the total of these repolymerized units is
) is 0.4 to 1.5 mol% (polymerized unit (1
) is 99.6 to 98.5 mol %), which is the same as requirement (A). Regarding the requirement (A''), in addition to the polymerized units (1) and (2), another polymerized unit (3) that is different from the polymerized unit (2) derived from a monomer copolymerizable with acrylonitrile, Based on polymerized units (1), it is present in an amount of not more than 5% by weight.Polymerized units (3) are preferably present in amounts not more than 3% by weight, based on the same basis.

As the polymerized unit (3), preferably, for example, the following formula (
3) Here, R is a hydrogen atom or a methyl group, and Y is a group represented by -COOX (where X is a hydrogen atom, a sodium atom, or a methyl group), -〇〇OCR,
-〇〇NH, -C, H, -CH, SO, Na and -C@H45O3Na, which is a group represented by the following can be mentioned.

The acrylonitrile polymer used in the present invention, a monomer that provides the polymerized unit (1) by cleavage of a double bond, a monomer that provides the polymerized unit (2), and optionally the polymerized unit (3). It can be produced by polymerizing monomers giving the following in predetermined amounts.

The acrylonitrile polymer may be polymerized by any known method such as aqueous polymerization, emulsion polymerization, or solution polymerization.

In addition, with respect to requirement (B), any of the above acrylic fibers used in the present invention has an elongation rate of 10% or less at 260° C. in the relationship between temperature and elongation rate measured under elevated temperature. The preferable elongation rate is 6% or less. The acrylic fibers used in inter-knitting and inter-woven fabrics with aromatic polyester fibers of the present invention have superior heat resistance and less sagging in high-temperature environments compared to conventional acrylic fibers. ing. Since the acrylic fiber of the present invention has this property, it can be dyed at a normal dyeing temperature for aromatic polyester fibers when dyeing interwoven or interwoven fabrics with aromatic polyester fibers.

More preferably, the acrylic fiber used in the interwoven/interwoven fabric with the aromatic polyester fiber of the present invention has the following characteristics. The dry heat relaxation contraction rate at 210°C is preferably 3
% or less, more preferably 1% or less. Young's modulus is preferably 400" 700 Kgf/mI
m', more preferably 500 to 600 Kgf
/mm”. Tensile strength is preferably 2 to 5 g/d1
More preferably, it is 3 to 4 g/d. The tensile elongation is preferably 35% or more, more preferably 35 to 60%.

The acrylic fiber used in the inter-knit/interwoven fabric with the aromatic polyester fiber of the present invention is made from the acrylonitrile polymer specified in (A) or (A') above, for example (1) above (A) or A spinning dope of the acrylonitrile copolymer specified in (A') is extruded through an orifice of a spinneret to generate a trickle of the spinning dope, and (2) the trickle is coagulated and stretched 5 to 10 times to form a drawn yarn. (3) heating the drawn yarn to shrink it by 3 to 25%; and (4) subjecting the obtained shrinkable yarn to a drying process.

It goes without saying that the spinning dope used in step (1) above can be prepared by dissolving the acrylonitrile polymer in a solvent, but it can also be a polymerization solution containing the polymer obtained as a result of polymerization. In the latter case, it is desirable to employ a polymerization reaction system that can be used as a spinning stock solution for wet spinning by simply recovering unreacted hexamer from the polymerization solution.

The spinning method in Step 1i (1) above may be any known method such as wet spinning, dry-wet spinning, dry spinning, or semi-melt spinning. Wet spinning or dry spinning is particularly preferred. These spinning methods are known per se; for example, wet spinning is described in Japanese Patent Publication No. 57-167.410;
JP-A-57-167.411, JP-A-57-21
The method disclosed in Japanese Patent Application Laid-open No. 0.011, Japanese Patent Application Laid-Open No. 57-112410, or Japanese Patent Application Laid-Open No. 58-132107 is adopted. Regarding the dry method, for example,
Publication No. 9-1.665 or JP-A-59-21,71
As for the method described in Publication No. 1 and the dry-wet method, the method described in Japanese Patent Application Laid-Open No. 51-92316, etc. are employed.

No matter which spinning method is used, the spinning dope is processed in step (1).
, which is extruded from the spinneret to form a trickle of spinning dope. In wet spinning, the trickle is forced into the coagulating liquid,
In dry spinning, the rivulet is extruded into a hot gas atmosphere, and in the wet-dry method, the rivulet is extruded into a gas atmosphere and then introduced into a coagulating liquid.

Next, in step (2), the trickle is stretched 5 to 10 times while undergoing coagulation as described above. Stretching can be carried out in one stage or in multiple stages. The stretching ratio of each stage in the multi-stage stretching is appropriately selected within a range where the total ratio is 5 to 10 times. The preferred stretching ratio is 6 to 8 times. If the stretching ratio is less than 5 times, the tensile strength of the fibers will be insufficient, and if it exceeds 10 times, single fiber breakage will easily occur and fibrillation will occur.

The drawn yarn obtained in step (2) is then subjected to a washing step (in the case of wet and wet-dry spinning) or oiled, if necessary, and then guided to the heating step of step (3).

In step (3), the drawn yarn is heated to shrink by 3 to 25%. If this shrinkage is less than 3%, the tensile elongation of the fiber will be insufficient;
If it exceeds 5%, high temperature drying becomes necessary, which is not economical.

When the spinning in step (1) is performed by wet spinning, this shrinkage can be carried out using hot water or warm heat before the so-called pre-drying step before subjecting the drawn yarn to a crimper.
Alternatively, it can also be carried out in a pre-drying step.

The resulting shrink yarn is then dried in step (4). If shrinkage is carried out as described above (in or before the so-called pre-drying step), this step (4) corresponds to the so-called post-drying, which is carried out after crimping if necessary. The thus-obtained acrylic fiber used in the inter-knit/interwoven fabric with the aromatic polyester fiber of the present invention is cut into a predetermined length using a cutter.

The aromatic polyester fiber used in the knitting/mixing fabric of acrylic fiber and aromatic polyester fiber of the present invention is not particularly limited, but preferably includes, for example, polyethylene phthalate whose main repeating unit is ethylene terephthalate, or hexamethylene terephthalate as a main repeating unit. Polyhexamethylene terephthalate as a repeating unit, polytetramethylene terephthalate as a main repeating unit of tetramethylene terephthalate, poly1.
Examples include polyvivalolactone whose main repeating unit is a ring-opened product of 4-dimethylcyclohexane terephthalate and pivalolactone. These polyesters can be homo- or co-polyesters.

Examples of co-polyesters include polyesters in which the main repeating unit is ethylene terephthalate and the minor repeating units (eg, 10% mole or less of all repeating units) are ethylene isophthalate. Examples of other copolyesters include ethylene 5
- Sodium sulfoisophthalate with 5 total repeating units
Polyethylene terephthalate containing less than mol% can be mentioned. More preferred aromatic polyester fibers include, for example, homo- or co-polyesters of ethylene terephthalate having ethylene terephthalate as the main repeating unit.

It may also be a conjugate fiber with aromatic polyester fibers of the same or different types, or a conjugate fiber with other materials such as polyamide fibers. The polyester fibers may be either filaments or staples.

The structure of the interwoven fabric of the present invention may be either double knit or single knit and is not particularly limited, but preferred examples include double knits such as plating knitting, fleece knitting, smooth knitting, and jersey knitting. The weave of the mixed fabric is also not particularly limited, but preferred examples include plain weave, twill weave, and double weave.

For example, when the aromatic polyester fiber is a homopolymer of ethylene terephthalate having ethylene terephthalate as the main repeating unit, the dyeing of the interwoven fabric of the acrylic fiber and the aromatic polyester fiber of the present invention is carried out using the usual 120-130 dyeing method. It can be carried out by l-bath dyeing using, for example, disperse dyes and cationic dyes (for acrylic fibers) under high temperature conditions of .degree.

(Example) Hereinafter, the present invention will be explained in detail with reference to Examples. Note that unless otherwise specified, parts and percentages are by weight. Analysis methods for various physical property values in the present invention and the following examples -
The measurement method or definition is as follows.

[Polymer composition] l) When the polymerization unit formula (3) did not have -303M, the following method was used.

〇 Hs M: Proportion α1 of hydrogen atoms or -equivalent cations in the polymer [wt% 1] was determined by the following measurements and calculations. First, Polymer A [gl (about Ig) was accurately weighed and dissolved in dimethylformamide (JIS special grade).

Next, strong acid type cation exchange resin (50-100 mesh,
After mixing and stirring for 1 hour, the resin was separated using a glass filter. Furthermore, the above oral fluid was titrated using a potentiometric titration device (Hiranuma Sangyo COM-101 model) using 18, N NaOH. Further, a blank test was conducted under the same conditions and corrections were made.

A+ However, A,; Polymer amount [gl, B, 18@N Na OH sample titer [mlC1;
'eN NaOH blank test titration [m1lD1: Molecular weight of polymerization unit formula (2) fly'8, NaOH titer of Nii) R 1 (CH, -C) Y' Formula (3)' R: Hydrogen atom or methyl group Y', -COOX, -0COCH, -CON Hz, -C, H.

X: The proportion β of hydrogen atoms, sodium, or methyl groups in the polymer, [% by weight] was determined by the following measurements and calculations. First, add 0.5 g of polymer to dimethyl sulfoxide (J
IS special grade) to make a 50 g/1 solution.

A liquid cell made of CaF2 was used and an infrared spectrophotometer (Takashi Seisakusho IR-
Infrared spectra were recorded in the regions 2.500-1.850 cm-' and 1.850-l, 500 cm-' with a 430 model). Absorbance of polymer unit formula (3)' determined by baseline correction (if Y' has 100-, C-0 stretching vibration absorption band of 1.500 to 1.800 cm-', Ca Hs 1.500 to 1.70 if it has
(Using -C-H out-of-plane bending vibration absorption band of 0 cm-')
and the absorbance of the 2.240 cm-' absorption band of the polymer unit formula (1) by pre-mixing the monomer polymers of the polymer unit formulas (1) and (3)' in various ratios, and performing the above method. It was determined from the calibration curve of the absorbance ratio determined by.

i) The proportion [wt%] of the polymerization unit formula (1) in the polymerization units is γ+-100-(a1+βl), and the composition of the polymer composition for cholera [mole ratio] was calculated by the following formula.

11'/βr'/a I'-(K 1γ1153.
06) / (K, βl / E +) / K r a r
/ D l) However, γ, ′ and γ; Proportion of polymer unit formula (1) in the polymer E mol %] and [wt % j β1′ and β1; Proportion of unit formula (3)′ in the polymer
Proportion [mol %] and [weight %] α, ′ and a; Proportion [mol %] and [weight %] of polymer unit formula (2) in the polymer El; Molecular weight of polymer unit formula (3)′ Dl - Molecular weight Kl of polymerization unit formula (2); l/((γ, 153.06) + (βl/El)+
(αr7 D +) ) 2) When Y in the polymerization unit formula (3) was replaced by 10H, So, Na or 10, H, 5OsNa, the following method was used.

i) Proportion t13 of polymer unit formula (2) in the polymer
% by weight] was determined by the following measurements and calculations.

Measurements and calculations were performed according to method i) of l). However, the absorbance of the polymer unit formula (2) was at the 1,666 cm'' absorption band, and a homopolymer of the polymer unit formula (2) was used instead of the polymer unit formula (3) to create the calibration curve.

if) The proportion of the β arm [wt%] in the polymer of the polymer unit formula (3) was determined by the following measurements and calculations.

]) Method i) Perform measurements and calculations.
.

β, [wt%] − [(('to)x r !X(B !
-C2) [m1lxEzxl O-”)/A!:IXI
00 However, A,; Polymer amount [gl, B,; 18*N NaOH sample titer [m1] C2;
18@N NaOH blank test appropriate amount [m1lE,; molecular weight f of polymer unit formula (3),; 18, NaOH titer of N in) Polymer composition [molar ratio] according to the method of l) ui) was calculated.

72'/βz'/a*'-(Kl7*/53.
06) /(x*7?*/Ez)/ (x*σ.

/D,) However, γ, and γ6 The proportion of polymer unit formula (1) in the polymer [mol%] and [weight%] β, ' and β,; The proportion of polymer unit formula (3) in the polymer [ mol %] and [weight %] α2' and α,; proportion of polymer unit formula (2) in the polymer 1 mol %] and [weight %] E,; molecular weight of polymer unit formula (3), i polymerization Molecular weight Kz of unit formula (2); 1/((γ!153.06)+(βz/Ex)+
(a*/D t)) C degree of polymerization J First, 0.2 g of the polymer was dissolved in dimethylformamide (JIS
(special grade) was dissolved in approximately 50 ml to prepare a solution of C' [g/l]. Using an Ostwald viscometer in a constant temperature bath maintained at 30° C., the number of seconds A for falling of the solution and the number of seconds B for falling of dimethyl formaldehyde were measured.

The degree of polymerization P was determined by the following calculation.

Relative viscosity rel-A/B Specific viscosity +7 sp -9rel -1 Viscosity average molecular weight Mv - (vsp/, C) /1.5X10-' P = M? /m However, average polymerized unit molecular weight m= (53,06Xγ+E
Xβ+DXa)/100 C[mol/11-C'/crystal where γ; Ratio of polymer unit formula (1) in the polymer [mol%] β; Ratio/combination of polymer unit formula (3) in the polymer E mole%
1 α; Proportion of polymer unit formula (2) in the polymer [mol%
E: Molecular weight of polymerization unit formula (3) D: Molecular weight of polymerization unit formula (2) [Relationship between temperature and elongation measured at elevated temperature] The apparatus used is shown in FIG. 2. Total length of about 30d fiber, 80mm
Make a loop of mm (40 mm when folded in half, 2), hold it in the heating cylinder l which is open to the upper and lower atmosphere using clip 3, and use a wire to place a load of 25 mg/cm under the heating cylinder.
d (approximately 1.500 mg54). Next, the temperature was raised from around 30°C at an average rate of 40°C/min, and the load position was tracked with the camera 5 and recorded together with the temperature. FIG. 1 shows the relationships measured using this method for several acrylic fibers.

The elongation rate [%] is (displacement of load [mml / 40 [m
m] ) xl Calculated from OOni.

[Relaxation/shrinkage rate] A fiber bundle of about 600 mm was made with a total of about 9000 d of fibers, and marks were made at 500 mrn intervals under a load of 0.1 g/d (about 900 g) at room temperature.

The unloaded fiber bundle was treated with dry heat at 210° C. for 30 minutes without applying tension. A load of 900 g was applied again to the fiber bundle that had been cooled to room temperature, and the mark interval A [mml] was measured.

Relaxation contraction rate [%1 is ((500-A)1500)X10
Calculated using 0.

[Tensile strength and elongation, Young's modulus] Based on JIS L 1015, constant speed extension type tester (
The measurement was performed using Toyo Baldwin UTM-11N).

Reference example! A spinning stock solution prepared by dissolving an acrylic polymer having the composition and degree of polymerization shown in Table 1 in dimethylformamide (hereinafter abbreviated as DMF) and adjusting the polymer concentration to 26.5% by weight, The coagulation bath DMF/Water-60/
40 (weight ratio), extruded at 20°C, spinning draft 0.
After collecting in step 4, DMF/water - 30/70 (weight ratio)
, and stretched 8 times at 85°C.

Subsequently, after washing with water and applying oil, roller drying was performed at 150° C. while applying 15% shrinkage.

Furthermore, after oil application - crimp application - crimp set (
After drying (humid heat at 120°C), 2d acrylic fibers were obtained.

The obtained acrylic fiber had the characteristic values shown in Table 1. In addition, FIG. 1 shows the relationship between the elongation rate and the temperature measured under elevated temperatures in Runs 1 (curve ■), 2 (curve ■), and 5 (curve ■).

The meaning of each note in Table 1 above is as follows.

Book 1: Abbreviation for sodium 2-acrylamide-2-methylpropanesulfonate (SAMP! 3), Book 8: Abbreviation for methyl acrylate, Book 3: Value at 260°C in the relationship between temperature and elongation measured at elevated temperatures. Dry heat treatment at 210°C for 30 minutes. Sodium methallylsulfonate was used in place of SAMPS.

Reference Example 2 A spinning stock solution prepared by dissolving an acrylic polymer having the composition and degree of polymerization shown in Table 2 in dimethylformamide (hereinafter abbreviated as DMF) and adjusting the polymer concentration to 26.5% by weight was Coagulation bath DMF/Water-60/4 from the orifice of a 90,000-hole spinneret with a circular cross section of 0.05 m/m
0 (weight ratio), extruded at 20°C, spinning draft 0.4
After taking it over, DMF/water - 30/70 (weight ratio),
It was stretched 8 times at 850°C.

Subsequently, after washing with water and applying oil, roller drying was performed at 150° C. while applying 15% shrinkage.

Furthermore, after oil application - crimp application - cring set (
After drying (humid heat at 120 DEG C.), acrylic fibers of 1.5 d were obtained.

The obtained acrylic fiber had the characteristic values shown in Table 2.

Examples 1 to 9 and Comparative Examples 1 to 6 5 acrylic fibers of Run k 1 to 5 of Reference Example 1
After cutting to a fixed length of 1 mm, 2-inch spinning was carried out to 1 to 3 (3 for Examples 7 to 9 and Comparative Examples 5 and 6).
A spun yarn of (No. 2) was obtained.

Next, fabrics are made with the structure, yarn usage, and density shown in Table 3, and then the piece-dyed mixed fabric is obtained through the following steps: scouring, dyeing, reduction washing, soaping, drying, finishing, and finishing setting. Ta.

For dyeing, disperse dyes (dianics,
manufactured by Mitsubishi Kasei Corporation) and cationic dyes (Nystol,
Sunsalt Cl was used as an auxiliary agent.
-12 (manufactured by Nicca Chemical Co., Ltd.), Unisalt 5M (manufactured by Meisei Chemical Co., Ltd.) and acetic acid/sodium acetate to pH approximately 5.
In a dye bath adjusted to
The temperature was increased at a temperature increase rate of 15 minutes, and the temperature was maintained at 130° C. for 15 minutes.

Further, reduction cleaning was carried out at 80°C for 15 minutes in a bath containing hydrosulfide and caustic soda, and soaping was carried out at 70°C for 10 minutes in a bath containing Maysanol T-80 (manufactured by Meisei Chemical Co., Ltd.).

Table 4 shows the evaluation of the obtained mixed fabric.

Examples 1O to 15 and Comparative Examples 7 to 10 After cutting the acrylic fibers of Run No. 6 to 1O of Reference Example 2 to a fixed length of 38 mm, the oven-end spinning method was used! To 1 (Examples 10-l' 2 and Comparative Example 7.8) and 1 to 1
Spun yarns of different counts (Examples 13 to 15 and Comparative Examples 9 and 10) were obtained.

Next, a knitted fabric is made using the structure and yarn usage shown in Table 5, and then a piece-dyed mixed fabric is obtained through the following steps: refining, dyeing, reduction washing, soaping, drying, finishing, raising, shirring, and finishing setting. Ta.

Staining, reduction washing and soaping were carried out in the same manner as in Example 1.

Table 6 shows the evaluation of the obtained interwoven fabric.

Table (Effects) Cross-knitting of novel acrylic fiber and aromatic polyester fiber of the present invention dyed at the dyeing temperature of aromatic polyester fiber.
The mixed fabric is an unprecedented mixed knit/mixed fabric that has the vivid color development inherent to acrylic fibers and a flexible texture.

[Brief explanation of drawings]

FIG. 1 shows the relationship between temperature and elongation for the acrylic fiber of the present invention and a conventional acrylic fiber equivalent. FIG. 2 is a schematic diagram of the apparatus used to measure the relationship of FIG. 1. 1 other person

Claims (1)

[Claims] 1. A mixed knitting/mixed fabric of acrylic fiber and aromatic polyester fiber, (A), (a) the following formula (1) ▲There are mathematical formulas, chemical formulas, tables, etc.▼...・(1) The polymerization unit represented by the following formula (2) ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・(2) Here, M is a hydrogen atom or a cation of one equivalent. (b) the polymerized unit (2) accounts for 0.4 to 1.5 mol% of the total of the polymerized unit (1) and the polymerized unit (2);
(c) consists of an acrylonitrile copolymer with a degree of polymerization in the range of 600 to 1,500, and (B) in the relationship between temperature and elongation rate measured at elevated temperatures, 260 to 1,500.
A mixed-knit/mixed fabric of acrylic fiber and aromatic polyester fiber, characterized in that it contains acrylic fiber and has an elongation rate of 10% or less at °C. 2. The interlaced/mixed fabric according to claim 1, wherein the aromatic polyester of the aromatic polyester fiber is a homo- or co-polyester of ethylene terephthalate having ethylene terephthalate as a main repeating unit. 3. Mixed knitting/mixed fabric of acrylic fiber and aromatic polyester fiber, comprising (A') (a') polymerized unit of the above formula (1), and the above formula (2).
) and the polymerized unit represented by the polymerized unit (3) which is different from the polymerized unit of the above formula (2) derived from a monomer copolymerizable with acrylonitrile, (b') the above polymerized The polymerized unit (2) accounts for 0.4 to 1.5 mol% of the total of the unit (1) and the polymerized unit (2), and the polymerized unit (3) accounts for 5% by mole based on the polymerized unit (1). % by weight or less, (c) the degree of polymerization is in the range of 600 to 1,500, and (C) the relationship between temperature and elongation rate measured at elevated temperatures is 260
A mixed-knit/mixed fabric of acrylic fiber and aromatic polyester fiber, characterized in that it contains acrylic fiber and has an elongation rate of 10% or less at °C. 4. The interlaced or interwoven fabric according to claim 3, wherein the aromatic polyester of the aromatic polyester fiber is a homo- or co-polyester of ethylene terephthalate having ethylene terephthalate as a main repeating unit.