JPS5966582A - Mono-bath dyeing of mixed article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bath dyeing method for a mixed product containing cellulose fibers and polyester fibers (hereinafter simply referred to as a mixed product).

Conventionally, a two-bath dyeing method has been used for dyeing mixed products.

That is, in the first bath, polyester fibers are dyed to the desired hue with disperse dyes, and in the middle, reduction washing is performed to decompose and remove the dyes dyed on the surface of the polyester fibers and the disperse dyes that have contaminated the cellulose fibers. A very complicated dyeing method was used in which cellulose fibers were dyed with direct dyes or reactive dyes in the bath. The reason why two-bath dyeing is performed by inserting reduction washing between the first and second baths is as follows. That is, when dyeing polyester fibers with disperse dyes, the cellulose fibers are contaminated with the disperse dyes, and the disperse dyes that stain the cellulose fibers reduce the color fastness of the mixed product. Moreover, the degree of this staining disperse dye varies from dyeing batch to dyeing batch, and it is very difficult to match the target hue to the cellulose fibers with direct dyes or reactive dyes in the second bath.

Here, it is thought that it is possible to dye these mixed products using a mixed dyeing bath of disperse dyes and direct dyes, or □ of disperse dyes and reactive dyes, and then perform reduction washing.

However, the combination of disperse dye and direct dye7. ,
Ainya 7L;""o'-';L fiber/fiber contamination,
It is necessary to remove 1 and remove 4 properties of fastness by using cellulose.

It is necessary to perform reduction cleaning under strong treatment conditions that cause the direct dye dyed on the cellulose fibers to come off, and it becomes difficult to achieve the target hue on the cellulose fiber side. On the other hand, in a bath of a combination of disperse dye and reactive dye □
When dyeing＼Polyester □At the temperature at which cellulose fibers are dyed to the target hue (usually 30°C), most commercially available reactive dyes decompose thermally, making it difficult to dye cellulose fibers to the target hue. Can not do it. As a result of the above, conventional techniques have no choice but to use a two-bath method in order to dye side-fiber-mixed products to the target color in a durable manner, and a rational one-bath method is only possible when the polyester fiber side is undyed. This was only in the case of dyed products with colored patterns.

The inventors of the present invention solved these problems and conducted intensive studies on a one-bath method for dyeing blended products in a durable manner.As a result, the disperse dye hardly contaminates the cellulose fibers.1.Bamboo? Direct dye or 91 reaction 1 dye 11E'j (7) * 'b * Z
□, which dyes well with disperse dyes within Mtf&lik dyeing conditions.

The present invention was achieved by discovering riemeter fibers.

That is, in the present invention, when dyeing a mixed product in one bath, the polyester fiber is substantially made of polyethylene terephthalate, and the peak temperature ('l''max) of the mechanical loss tangent (tan δ) at the measurement frequency / / OHy.
(°C) is below lo'z°C, and the peak value of -δ (
-δ) It was found that using polyethylene terephthalate fibers having a structural characteristic of ma Ta.

The polyethylene terephthalate used in the present invention is a linear polymer with ethylene terephthalate as a repeating unit, and the third component is isophthalic acid, sodium salt of sulfonated isophthalic acid, polyethylene glycol, etc. in a proportion of less than s% by weight. Including those formed by copolymerization. It may also contain matting agents, stabilizers, antistatic agents, etc. that are usually added to synthetic fibers.

Furthermore, there is no particular limit to the degree of polymerization as long as it is within the range for normal fiber formation.

Conventionally, clothing fibers from Bo1'J esters have been produced by drawing undrawn fibers spun at a spinning speed of θOcm/4) or less by a factor of 3 to S. Such a drawn yarn has an extremely strong wave-shaped region, and has a peak temperature (Tmax) of the nominal mechanical anti-loss tangent (fan δ) at the measurement frequency /10
) is 7.2 h~/,? s”C, dyed with disperse dye at high temperature around 0℃, Tm after dyeing
Ax is also /2A'~/3! Located near r'c.

Recently, from the viewpoint of productivity, labor-saving methods such as so-called POY or high-speed spinning fibers, in which fibers are obtained only in the spinning process without drawing, are gradually being adopted.

1) What is referred to as OY is a fiber spun at a spinning speed of approximately 3 oOOV minutes, and is a raw yarn for obtaining bulky yarn by simultaneously performing drawing and pre-twisting in the drawing and pre-twisting process. . Bulky yarn obtained from such POY (young nδ)
max is 0. before and after staining. / around 0, Tni
Ax and Tmax are around 90″C, but 30% during staining.
Showing a shrinkage rate exceeding ? before and after staining? (7'C
The initial modulus at is less than s Of/d. Furthermore, the tensile strength is less than -r/d and the elongation is more than 0%, so it is not put to practical use as a clothing fiber. ·or,
High speed spun fibers, that is, spinning speed is 1000 m/min ~ t00
Fibers spun at 0 m/min and not drawn are (ta
fIδ)max is approximately 0. / 0 or more, Tmax
is around /10~//3''C, but 700~130℃
The tai δ max stained with is o, tyg ~ θ
/n, Tmax becomes / / & ~/ 2.11"C. That is, the microstructure changes due to the action of hot water during dyeing.

Therefore, conventional polyester fibers have a structure in which the iδ peak temperature Tmax ("C) at the measurement frequency / / 'OHz as referred to in the present invention is 105°C or less, and the -δ peak value (-δ) exceeds o, og. There were no fibers with these characteristics that had been put to practical use as clothing fibers.

It is in the amorphous region that the disperse dye dyes the polyester fiber. The values of Tmax and (tallIδ)max are suitable as characteristic values expressing the structure of the amorphous region.

T max is usually located at an O'C high temperature around the glass transition temperature, and (tarl δ) max is related to the amount of molecular chains in the amorphous region with activated thermal motion at the temperature T max.

In the present invention, Tmax and (-δ)rnax mean values related to mechanical absorption (αa absorption) caused by micro-Brownian motion of molecular chains inside the amorphous region. Therefore, qualitatively, the larger the (recommendation δ)max, the more the indeterminate area t6', 'rl'. 687. At a low temperature of 1, the micron round motion of the molecular chains within the indeterminate region becomes active at low temperatures, making it easier for disperse dyes to dye at low temperatures. □
The present inventors have discovered that the phenomenon in which disperse dyes permeate and diffuse into polyester fibers is closely related to (-δ)max and T+nax, and that the effect of disperse dyes on contamination of cellulose fibers is closely related to (-δ)max and T+nax. As a result of study, we have arrived at the present invention.

That is, the value of (-δ)max at the measurement frequency //θHz of polyester fiber exceeds o, og, and Tm
When ax is / 0 , t''C or less, the dyeability of the disperse dye is good, and on the other hand, staining of the cellulose fibers with the disperse dye is reduced.

The cellulose fibers of the present invention include bistoothrayon,
It contains regenerated cellulose m# such as cupra rayon and polynosic rayon, and natural fibers such as cotton and hemp. Cellulose fibers and polyester fibers are long fibers,
Any short fibers may be used, and these may be blended, blended, intertwisted,
It includes any mixed forms such as mixed knitting and mixed weaving, and the mixing ratio thereof is at least S weight % or more.

The mixed product produced by the method of the present invention contains S A-loin fiber and polyester fiber each in an amount of S weight % or more,
Other synthetic fibers such as polyamide fibers, polypyrene fibers, acrylic fibers, and natural fibers such as silk and wool may also be contained as the third and fourth components.

The one-bath dyeing method of the present invention means that a cellulose textile dye and a polyester fiber dye are added to the same bath and both fibers are dyed simultaneously in one bath. A method of changing the conditions of the dyeing bath (-bath □ two gate method)
It also includes.

When the dispersion dyeing is completed in the method of the present invention, the young cellulose fiber 1 may be contaminated depending on the type of dispersion dye stolen or once used. This degree of contamination can be removed by mild reduction cleaning or soaping that does not cause damage such as fading to the direct dyes or reactive dyes dyed on cellulose fibers. This makes it possible to improve the fastness and achieve the target color □ of cellulose fibers.

Polyester fibers having the structural characteristics as referred to in the present invention include undrawn polyester fibers spun at a spinning speed of 11,000 m/min or more;
It is obtained by heat-treating ester $alia in dry hot air heated to 220° C. to 300° C., in medium superheated steam, or in a mixed atmosphere of both. At this time, the tension applied to the fibers needs to be less than /f/d. The obtained polyester fiber may be used as it is, or may be false-twisted by a conventional method, or may be made into tow or stable fiber as a spinning raw material without changing its structural characteristics and is within the scope of the present invention. J A method for measuring the mechanical loss tangent (tar+δ) of the polyethylene terelatate fiber constituting the present invention is shown.

Toyo Pole Do□In Co., Ltd. Rheo-Pybron (Rhco-
Vibron) Using a DDV-NC type dynamic viscoelasticity measurement device, the sample was approximately 0.7 =, , measurement frequency/10H9
, -δ at each humidity is measured in dry air at a temperature increase rate of 10''.

-δ peak temperature (Tmax) from the recommended δ-temperature curve
(''C) and the peak value [(-δ)max] are obtained.

Next, the present invention will be explained in detail by giving examples.

Example 1 Polyethylene terephthalate fibers spun at a spinning speed of <100 θm/min (Left Od/21/, t = 2 gps) Tension applied to the yarn was □0.0'3 V/ in θgs seconds □ in air at °C. d
('Tmax' / 0"C)
+(-δ)max O,, Lo 9 ] 6 Also for simultaneous comparison □, the spinning speed was 13θorn/min, and after spinning, the fiber was drawn 33 times at 30"C!r Od/2 (same as for 1' fiber) Heat treated to [Tmax: / l A”C
, (-δ) may θ/-ri]. Each of these fibers is made of besobel (layer chemically made, regenerated cellulose fiber),
It was knitted into a striped pattern interlaced l/ricott by a conventional method using a mixed ratio (SQ%/SO%) with s od.

After dry heat setting these knitted fabrics at 780"C for 10 seconds, they were dyed under the following dyeing conditions, followed by "C soaping and fixing treatment, and then /90"Cx.
I set it to dry heat for 1Iθ seconds and finished it. Table 1 shows the fastness of these dyed knitted fabrics and the degree of contamination of the benvelub fibers.

<Dyeing conditions> Dye bidisperse dye Dianic Spordo GR-8F (manufactured by Mitsubishi Kasei) 13
%0＠ ・ Direct dye Kayarasu Subralbin l (made by Nippon Kazai Co., Ltd.) /, O%owf Auxiliary agent: Glauber's salt
/-2owf Demol N (manufactured by Dai-Kogyo Seiyaku) /f/
1 Dyeing depth: /θO℃, /30℃ Dyeing time = 60 minutes Bath ratio: /:, 20. ：〈Soubiig〉.

, carbonated soda 0. A;Y/l
・□ Score o-ru, FC-2! ;0 (manufactured by Kao Atlas) 7, f/l 00x, 20 minutes <Fix processing> 729L cut a7KP (El Yui tJJ)" Q%o
vrflfx θ min □ Table /' Water fastness: JIS-L-OgllA (Method B) Contamination degree (grade): Gray scale judgment for contamination (Grade 5): Low contamination (Grade 7): Contaminated heaven/from As can be seen, the knitted fabric dyed using the method of the present invention has good stain resistance and fastness at any dyeing humidity, whereas in the case of the tri-foot knitted fabric using the method other than the method of the present invention, /θO″C, dyeing In this case, the color development of the polyester fiber part is insufficient, and the fastness and stain resistance of the benvelub fiber part are insufficient.Also, when this is dyed at /30°C, the color development of the polyester fiber part is sufficient. However, the fastness and stain resistance of the Bemperg fibers were only extremely low.

The heat treatment system for the 7% yarn at a spinning speed of 7000 m and 7% in Example 1 was set to 200° C. with a false twisting heater length o and g 1n, and the yarn was placed on the spindle. The number of twists is 11,000t/m, and the stretching ratio is 11. :19
, yarn speed, /9(.

False twisting was performed for V minutes. Also, the spinning speed i, yoom of simultaneous comparison
The heat treatment system for the Z-divided yarn was similarly set using a false twisting machine, with the temperature of the false twisting heater set at 2.20°C, and the yarn was hooked onto the spindle, with the number of twists 'I 000 Vm % drawing ratio 0.970. Yarn speed/
2θm/7f+, '9 false twisting process. Each of these processed yarns, along with Benbelb (regenerated cellulose fiber manufactured by Fukkasei) qo and d, were used as warp, poly varnish, and chill fiber 1. Seven tassels of weft Bemberg fibers were woven in a conventional manner. These fabrics /70. 'C・× After dry heat setting for 30 seconds,
The spinning speed is as below.

11000 m/'t3-yarn taffeta, dyeing humidity/
00.7G, spinning speed/'300''' yarn 1y, p, +
i dyed at a dyeing temperature of ``''C, 3 to 1/3°C, washed in hot water for 70 minutes at GUO'C, then soaped, dried for 2 seconds at /gO'C, and finished by heat setting. .

<Dyeing conditions> Dye: Disperse dye Diamond Navy Blue! R-8! , (manufactured by Mitsubishi Kasei) / 2q% - Reactive dye (manufactured by Santo')
Auxiliary agent: mirabilite left Of/l
'Soda ash 7%owf Dyeing time: Each temperature It was shown to.

As can be seen from the table, the monobath dyed fabric produced by the method of the present invention has good color development and fastness.

On the other hand, in the case of the lid, the 100°C dyed product has insufficient color development of polyester fibers and also has slightly low fastness performance. In addition, this was dyed at 7.30℃ (Bollier table) Washing fastness: JIS-L-Og A-2 method) Although the color development of Stell fiber is sufficient, Penvelve fiber uses reactive dyes because the dye decomposes. The hue was completely different from that of .

Example 3 In a mixed solvent of phenol/tetrachloroethane, 3! Intrinsic viscosity at f'c [η] (hereinafter [η]
A polyethylene telegraph with a diameter of 0.1.9 (represented as
Spun from an r+ spinneret, parallel to the yarn at 22°C.
After cooling and solidifying with cooling air, an oil agent is applied and 6SoOV
It was wound at a speed of 1 minute. Obtained 30d/l l/-f
2'l of polyethylene terephthalate fibers! ;”
The tension applied to the fiber for o, gs seconds in air heated to C is 39/d.

/ f/d, 0. j　f/d was changed and heat treated.

(tan δ) of these heat-treated fibers and untreated fibers
maxlTmay is shown in Table 3.

The obtained fibers of Type 4 were knitted, dyed and finished in the same manner as in Example. Table 3 also shows the fastness of these knitted fabrics and the degree of staining of the Bemperg fibers.

The 3 g/d tension treated system and the untreated system, which are outside the scope of the present invention, have poor fastness and benbel stain resistance at any dyeing temperature, and /00'C dyeing results in insufficient color development in the polyester fiber portion. there were. - The tension/2/d and θ31/d treatment systems within the range of the strength wood invention method have good color development and fastness at any dyeing temperature. It had excellent characteristics.

Patent applicant: Asahi Kasei Industries, Ltd. Representative Patent Attorney Hoshi No Toru 4

Claims (1)

[Claims] (]) When dyeing a mixed product containing at least 5% by weight or more of cellulose m-fibers and polyester fibers in one bath, the polyester fibers substantially consist of polyethylene terephthalate, Measurement frequency 7/OI
The peak height (
T max )('C) is below 105℃,
The peak value (:(tanδ)max,) is o, tog
A single-bath dyeing method for mixed products characterized by having structural characteristics exceeding . (2) A polyester fiber is spun at a spinning speed of 7g or more and heat-treated under a tension of 0/f/d or less within a temperature range of 1.2.2θ to :ioo'c. A one-bath dyeing method for the mixed product according to item 1.