JPS5857549B2 - Dyeing and printing method for polyester fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for dyeing and printing polyester fibers.

It is known that polyester fibers are well dyed with water-releasing dyes, especially disperse dyes.

Conventionally, when dyeing polyester fibers by a pad-thermal fixation method, such as a pad steam method or a thermosol method,
With the exception of methods in which the dyeing solution is steam-fixed using high-pressure saturated steam after being padded, dyed products with a light to medium color density can only be obtained, which has been a problem.

Particularly in textile printing, the problem of insufficient build-up of dyes as described above is even more pronounced, and dyes have hardly ever been put to practical use.

Therefore, especially in the case of printing polyester fibers, a printing liquid consisting of a water-soluble sizing agent, a disperse dye, and other chemicals is printed on the fabric, and after drying, it is heated under high pressure above atmospheric pressure to 110 to 13
Dye fixation was performed by steaming for 20 to 30 minutes using high-pressure saturated steam at 0°C.

However, such batch-type high-pressure steaming takes time to prepare and process, is complicated to operate, and has many incidental losses such as undercrossing, making it extremely uneconomical and inefficient.

Several continuous steaming methods using high-pressure saturated steam have been proposed as a measure to solve this problem of uneconomical and inefficient methods, but there are still many mechanical technical problems such as high-pressure sealing. There is still room for research, but it has not yet been put into practical use.

For this reason, in recent years, continuous fixing methods using normal pressure superheated steam or dry heat have been trending as dye fixing methods that can be made continuous. As such, the build-up performance is usually significantly inferior to that of fixation using high-pressure saturated steam.

As a result of intensive research, the present inventor has conducted extensive research in order to develop a method that can obtain a high degree of dye build-up for dyeing by pad-thermal fixation or printing by printing-thermal fixation of polyester fibers as described above. The dyeing and printing method of the present invention has been achieved.

One object of the present invention is to provide a method for dyeing and printing polyester fibers that provides sufficient dye build-up and provides uniform and fast dyed products ranging from light to dark colors. .

Another object of the present invention is to provide an economical and highly efficient method of dyeing and printing polyester fibers by continuous dye fixation.

These and other objects of the invention can be achieved by the method of the invention.

That is, the present invention provides a method for dyeing and printing polyester fibers using a disperse dye, and this method dyes and prints polyester fibers using the following formula I: [wherein A and B are Hydrogen atom or carbon number 2~
R1 and R2 each represent a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, a and C each represent an integer of 0 to 100, and represent an integer of 1 to 100.

However, A and B are not both hydrogen atoms, and when A and B are both acyl groups, these acyl groups are the same as each other, and R1 and R2 are both hydrogen atoms or alkyl groups. It shall not be a group, and a, b and C may be the same or different, but a and C shall not both be O.

It is characterized in that it is treated with a dyeing solution or a printing solution containing at least one of the compounds shown in ] and heated.

The polyester fibers useful in the present invention are fibers obtained from polyesters such as polyethylene terephthalate and modified polyester fibers thereof, and these fibers are filamentous,
It may be in any shape such as a knitted fabric or a woven fabric.

It may also be a blended or interwoven product with other fibers, including polyester fibers.

Dyes useful in this invention are disperse dyes.

Typical examples of such dyes include ab, azomethine, nitro, and anthraquinone dyes.

The "staining solution" used here is an aqueous solution containing, in addition to the above-mentioned disperse dye, a migration inhibitor such as sodium alginate, a pH adjuster, and other auxiliary agents if necessary.

This dye solution is applied to polyester fibers, for example, by the usual pad method.

A "printing liquid" is an aqueous viscous liquid which contains, in addition to the disperse dye, a so-called base paste consisting of, for example, an aqueous size solution, a pH adjuster and, if necessary, other auxiliaries.

The viscosity of this liquid varies depending on the fiber material used, printing method, etc.

Examples of the glue components contained in the original glue include locust bean gum-based and guana gum-based glues such as Maypro Gum NP (Maypro), Thickening 301 Extra (Grinara), and Sorbitose C-5 (Scorten).
Etherified starch-based sizing agents such as etherified starch-based sizing agents such as Lame Gum (Grinara Co., Ltd.), C, M, and C-based sizing agents such as Fine Gum (Dai-ichi Kogyo Co., Ltd.), and Manutex F.
X(A,I.

There are sodium alginate adhesives such as L9 Co., Ltd.

These glues are usually used as an aqueous solution containing 3 to 50% of at least one of them.

Other base glues include, for example, emulsion type base glues made by emulsifying mineral oil such as mineral turpentine and water using a suitable emulsifier such as Deifazol EV (Shiba Geigy), and the above-mentioned water-soluble glues. There is a semi-emulsion type base glue obtained by mixing the base glue consisting of .

These original pastes are used in an amount of 20 to 80% of the total amount of the printing solution, and the viscosity of the printing solution is adjusted accordingly.

Various agents are used as auxiliary agents in the printing solution depending on the purpose.

Typical examples include pH adjusters such as tartaric acid, acetic acid, and ammonium sulfate, and reduction inhibitors such as sodium m-nitrobenzenesulfonate and sodium chlorate. A dye or the like may also be used.

The above-mentioned printing liquid can be used in normal printing methods such as roll printing, screen printing, rotary screen printing,
It may also be applied to polyester fibers.

The compound of formula (1) according to the present invention is an ester of alkylene glycol or polyoxyalkylene glycol and an aliphatic or aromatic carboxylic acid.

Examples of these glycols include propylene glycol, dipropylene gnocol, tripropylene glycol, and polyoxypropylene glycols of various molecular weights, as well as various polyoxypropylenes obtained by adding ethylene oxide to these polyoxypropylene glycols. There is a polyoxyethylene block polymer (Pluronic).

Carboxylic acids that react with these glycols include acetic acid, butyric acid, propionic acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, lysyllic acid, behenic acid, etc. saturated or unsaturated hydroxy fatty acids, as well as aromatic carboxylic acids such as benzoic acid, salicylic acid, and naphthionic acid.

The reaction between these carboxylic acids and glycols is a normal esterification reaction, such as a dehydration reaction between an acid and an alcohol,
The reaction may be carried out by a method commonly used in the reaction of an acid anhydride and an alcohol, or the reaction of an acid halide and an alcohol, whereby the desired esters can be obtained.

Esters of such polyoxyalkylene glycols that are particularly suitable for the process of the present invention have relatively high total molecular weights and relatively low water solubility.

Although the theoretical mechanism of the action of these compounds is not clear, it is assumed that the disperse dye and these compounds form an adduct, and that this adduct contributes to the enhancement of dye dyeing. .

The compound of formula I according to the invention is suitably added in an amount of 0.5 to 5.0% by weight relative to the dyeing liquor or printing liquor.

After these dyeing liquids or printing liquids are padded or printed on polyester fibers, they are dried or not dried and then heated with high pressure saturated steam at 110 to 140°C for 20 to 30 minutes.
High pressure steaming for 0 minutes, thermosol for 30-180 seconds with hot air at 180-2200C or 160-1808
The dye on the fibers is thermally fixed by steaming for 2 to 8 minutes with normal pressure superheated steam of C.

The dyeing or print obtained may then be soaped and dried by conventional methods.

By the above-described operations, it is possible to dye or print polyester fibers with sufficient dye build-up properties, and to obtain a uniform and strong dyed product.

In the dyeing and printing method according to the present invention, the characteristics of the present invention are clearly exhibited in the case of thermal fixation using superheated steam steaming or dry heat thermosol, which makes it extremely economical compared to conventional methods. Moreover, efficient dyeing and printing can be realized.

The compounds of formula I according to the present invention may be used alone or in combination.

By adding these compounds, a stable dyeing solution or printing solution with excellent permeability can be obtained.

In particular, in the printing solution, there is no appearance of blurring of the pattern boundaries, that is, the phenomenon of discoloration, which often occurs in products when surfactants are added in conventional methods, and the printed product is uniform and Western-style. is obtained.

That is, according to the method of the present invention, extremely economical and efficient dyeing or printing can be carried out, and uniform and fast dyed or printed products with excellent colors ranging from light to deep colors can be obtained.

The following examples are intended to explain the features of the present invention in more detail, and are not meant to limit the invention.

Example 1 Preparation of polyoxypropylene glycol fatty acid ester Polyoxypropylene glycol 4 with an average molecular weight of 400
00 parts, 282 parts of oleic acid and p as an esterification catalyst.
3.4 parts of -t-toluenesulfonic acid is added, and a dehydration reaction is carried out at 220 to 230°C for 3 hours while heating and stirring under a nitrogen stream.

The amount of dehydration at this time was 95 times the calculated value.

The obtained reaction product existed as a flat light brown transparent viscous liquid at room temperature, and its acid value was 5.2.

This product is insoluble in water and soluble in alcoholic solvents.

Example 2 Preparation of Pluronic fatty acid ester (1) Preparation of acetic acid ester Add 204 parts of acetic anhydride to 2000 parts of Pluronic obtained by adding about 5.7 moles of ethylene oxide to polyoxypropylene glycol with an average molecular weight of 1750. was added and reacted for 2 hours at 105 to 110'C while heating and stirring.

After the reaction was completed, the mixture was treated at the same temperature under a pressure of 25 mm of mercury for 1 hour to remove unreacted raw materials and by-products.

The obtained reaction product existed as a pale yellow transparent viscous substance at room temperature, and its acid value was 0.2.

This product dissolves in water to give a clear solution.

(11) Preparation of stearic acid ester To 2000 parts of Pluronic used in (i), 284 parts of stearic acid and 11.
Add 5 parts of
The dehydration reaction is carried out at ~240'C for 3 hours.

The amount of dehydration at this time was 97 times the calculated value.

The obtained reaction product existed as a white solid at room temperature, and its acid value was 1.3.

This product dissolves cloudy in water. (iii) Preparation of oleic acid ester 5000 parts of Pluronic obtained by reacting polyoxypropylene glycol with an average molecular weight of 3850 during addition with about 24 mol of ethylene oxide, 565 parts of oleic acid and p-toluenesulfonic acid as an esterification catalyst. Add 27 parts and heat with stirring under nitrogen stream,
Dehydration reaction is carried out at 230-240°C for 3 hours.

The amount of dehydration at this time was 98.1% of the calculated value.

The obtained reaction product existed as a yellow opaque viscous liquid at room temperature, and its acid value was 1.7.

This product dissolves cloudy in water.

Example 1 A suede fabric made of processed polyester yarn was impregnated with a dye solution having the composition shown in Table I below, nipped with a mangle to pick up 91%, dried at 100°C for 5 minutes, and then dried at 190'C for 60 seconds. Dry treated.

However, in these dyeing solutions, sodium alginate (Manutex EX, printing paste, British Alginate Industries Limited) is contained in an amount of 1 part, the dye is contained in an amount of 3 parts, and the compounds of each synthesis example are contained in an amount of 1.5 parts. pH is 4.5 with acetic acid
adjusted to.

The dyeing rate of each dyed product obtained is shown in Table I according to the surface optical density ratio.
Shown below.

By this method, when the compound according to the present invention was used in a dye bath, a dyed product with a good dyed surface and excellent build-up was obtained.

Example 2 A suede fabric made of polyester processed yarn was printed using a test autoscreen printing machine (manufactured by Tsujii Senki Kogyo) using printing liquids A and B having the following compositions, and after drying, each was printed at 190°C for 60 seconds. A dry heat treatment or steaming using normal pressure superheated steam at 170° C. for 7 minutes was performed.

As a result, the printed material obtained using the compound according to the present invention was clear and had excellent build-up properties.

Claims (1)

[Claims] 1. When dyeing or printing polyester fibers using a disperse dye, the polyester fibers can be dyed or printed using the following general formula I: [In the above formula, A and B are each a hydrogen atom or a carbon number of 2 to 2].
22 acyl groups, R1 and R2 each represent a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, a and C each represent an integer of 0-100, and b represents an integer of 1-100. However, A and B are not both hydrogen atoms, and when A and B are both acyl groups, these acyl groups are the same as each other, and R1 and R2 are both hydrogen atoms or alkyl groups. It shall not be a group, and a, b and C may be the same or different, but a and C shall not both be O. A method for dyeing and printing polyester fibers, which comprises treating with a dyeing liquid or printing liquid containing at least one of the compounds shown in the formula below and heating.