JPS5938357B2 - Dry transfer printing method for acrylic synthetic fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer dyeing method for acrylic synthetic fibers, which is characterized in that a fast dyed product is obtained without steaming after dry transfer printing.

Currently, disperse dyes are mainly used as dyes for dry transfer printing, but it is known that some cationic dyes suitable for dyeing acrylic synthetic fibers are also suitable for dry transfer printing. Several patents, documents, etc. related to this can also be found.

According to known literature, the conditions for dry transfer printing using cationic dyes are generally a temperature of 160 to 200°C and a time of 15 to 90°C.
seconds, pressure 50-1,000.9/CI? Dry transfer is carried out under conditions L, followed by steam treatment if necessary to obtain a more durable dyed product.

According to the inventor's research, the generally known method:
Due to the mechanism of cationic dyes, it is difficult to obtain durable dyed products that can be used in practical use only by dry heat transfer treatment without steam treatment. Not only does this complicate the process, resulting in overheating, but it also tends to cause troubles such as deformation of the pattern of the fabric used for steaming, and problems such as cracking.

Furthermore, especially in the case of acrylic fibers, dry heat transfer treatment or steam heat transfer treatment alone will not work unless a softening treatment is applied in advance to give flexibility and smoothness to the fibers at the sewing stage to make the final product. Sometimes, the frictional heat between the fibers and the sewing needle tends to cause thread breakage, which can be a problem.
A flexible finishing process is essential.

As described above, the known methods are insufficient to ultimately obtain a satisfactory product, and the process must become complicated in order to obtain a satisfactory product.

Therefore, it is desired to simplify the process.

The present invention was devised in order to solve these problems and to simplify the process while obtaining a durable dyed product.

To explain the present invention in detail below, in the known method, the heat resistance of acrylic fiber is taken into consideration as mentioned above, and processing is carried out at a dry heat transfer temperature in the range of 160 to 200'C. Increase the temperature to 200-2200C for 1 hour.
5.~60 seconds, pressure 50~1,000g-/Cr? After performing dry heat transfer processing under the conditions of L, a dyed product that is strong and has a good texture is obtained by performing a soft finishing treatment that also serves as a washing treatment under normal conditions without steaming treatment. I found out that it is possible.

In other words, the heat resistance temperature of normal acrylic fiber is at most 20
It is said that the transfer temperature is below 0℃, but when the transfer temperature is increased to 220℃, the texture immediately after transfer can be seen to harden, but by applying a final soft finishing treatment, it is almost in its original state. It is also possible to obtain a durable dyed product without steam treatment.

Here, examples of cationic dyes (including old basic dyes) suitable for the present invention include those having sublimation, evaporation, or melt migration properties; specifically, Astrazone Yellow 7GLH (manufactured by Bayer AG), Cachiron Yellow 3GLH, Eisenriki Chiron Red 6BH
(manufactured by Hodogaya Chemical Co., Ltd.), malachite green (C, 1, 4
2,000), methyl violet (C, 1,4253)
5), Crystal Violet (C, 1,42555)
, Rhodamine B (C, 1, 45170), Astrazon Blue-BGE (manufactured by Bayer), Eisencathilone Brilliant Yellow 5GLH, Eisencathilone Pure Blue 5GH (manufactured by Hodogaya Chemical Co., Ltd.) are representative examples. It is mentioned as.

Next, examples of softening agents suitable for the present invention include Kneehole FG (cationic polymer softener; manufactured by NICCA Chemical Co., Ltd.), Zontes TA430 (alkyl polyamine type softener; manufactured by Matsumoto Yushi Co., Ltd.), Cypinol AW-3 (cationic polymer softener; manufactured by Sanyo Chemical Co., Ltd.), Cypinol P
N-3500 (polyethylene oxide softener; manufactured by Saiten Kagaku Co., Ltd.), Taflondul (anionic softening agent manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), Taflon Permasol (polyamine-based softener; manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), Soflon Typical examples include AK (cationic polymeric softener; manufactured by Myoshi Oil & Fat), Avitex NA (cationic softener; manufactured by DuPont), Seranine HC (cationic softener; manufactured by Sandoz), etc. By using these softening finishing agents, it is possible to impart a softer texture that is even different from the unique texture of acrylic fibers.

Next, if a high temperature of 200° C. or higher is applied to the acrylic fiber during dry heat transfer, the fabric may yellow slightly depending on the properties of the fiber itself.

As a countermeasure for this, the inventor's research has confirmed that it is highly effective to perform a fluorescent whitening process using a fluorescent dye using a conventional method before the fabric is underlined.

Specifically speaking, representative examples of these fluorescent whitening dyes include Blancofol ACB, Blancofol ACF (
Daitofall AN (manufactured by Daito Chemical Co., Ltd.), Ubitex A Conc, Ubitex ALN Conc (manufactured by Ciba), Mika White AT Conc, Mika White ATN (manufactured by Mitsui Toatsu Chemical Co., Ltd.), Nichiro Good results can be obtained by using White W (manufactured by Nicca Chemical Co., Ltd.), Whitex AC (manufactured by Sumitomo Chemical Co., Ltd.), and the like.

However, with the pre-bleaching method that is commonly used for acrylic fibers, using the acid activation method using sulfur chlorite, the yellowing of the fabric becomes severe during dry heat transfer, resulting in poor results. was not obtained.

The present invention also allows the following.

That is, in the underlining process of the fabric to be printed, appropriate amounts of the above-mentioned softening agent and fluorescent whitening agent are uniformly pretreated on the fabric by a conventional method.

Next, when dry heat transfer is performed under the above transfer conditions, not only is there no noticeable yellowing of the fabric due to the effect of the fluorescent whitening agent, but the texture is also significantly hardened because the fabric has been previously subjected to a soft finish treatment. It is possible to obtain a printed cloth that is sufficiently durable for practical use without being visible, and there are no problems in sewing.

Therefore, by using the present invention, it becomes possible to perform dry transfer processing on acrylic fibers using a cationic dye, unlike the dry transfer process currently performed on polyester fibers using disperse dyes.

As described above, by using the present invention, it is possible to extremely simplify the process and at the same time obtain a durable and clear dyed product.

Next, the present invention will be explained in more detail with reference to examples.

Example 1 (1) On gravure paper with a basis weight of 609/m", black, red, and eye inks were prepared using the ink formula shown below in the usual manner, and an arbitrary pattern was printed using a gravure printing machine. A multicolor transfer paper was obtained.

(2) Using the transfer paper given in (1), apply pressure 1 to the various acrylic materials shown below at 210°C x 30 seconds.
Dry heat transfer was performed under the condition of 00 g/ffl.

(3) Next, adjust the texture by adding simple hot water and rinsing elements.

As a softening agent, 2 g of Tafrondur (anionic softening agent manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) was used at a liquid temperature of 1140°C and a bath ratio of approximately 1/30, and was subjected to win treatment for 15 minutes, then dehydrated and dried. As a result, a dyed cloth was obtained that was bright, strong, and had a good texture.

(4) In addition, JISL-101 is used to check whether there is any physical deterioration such as strength deterioration of the various fabrics shown in (2).
8-1970 Knitted Fabric Test Method, the following items were tested for physical properties, and as a sewing test, ≠9 and +1 manufactured by Organo were tested using an industrial sewing machine manufactured by Pegasus.
When various sewing tests were conducted using a No. 1 sewing machine needle at a speed of 3,600 revolutions per minute, it was confirmed that there were no problems at all compared to unprinted cloth.

◎ Test items (a) Tear strength (single tongue method), (b) Abrasion strength (uniform method), (c) Tensile strength (after club), and (2) Bursting strength (musin method) Example 2 (1) Using the ink and paper shown in Example 1 (1), gravure printing was performed with a white-out pattern to obtain multicolor transfer paper.

(2) Next, the cashmilon smooth cloth was subjected to fluorescent whitening treatment in advance in a dye solution having the following formulation.

Liquid temperature: 90°C x 60 minutes Wince treatment (3) After dry heat transfer under the same conditions as Example 1 (2) and (3), a soft finishing treatment was performed, and the yellowing of the fabric was almost noticeable. A dyed cloth was obtained which was clear, robust and had a good texture.

Example 3 (1) 2 g/l of Tafrondur was added to the cashmiron smooth cloth treated as shown in Example 2 (2).

Win treatment was carried out using a softening solution at a liquid temperature of 40° C. and a bath ratio of 1/40 to obtain a fabric to be dyed which had been previously subjected to a fluorescent whitening treatment and a softening finish.

(2) Using the fabric to be dyed obtained in (1), (
Temperature 21 on multicolor printing transfer paper with a white pattern shown in 1).
After dry heat transfer was performed at 0° C. for 30 seconds at a pressure of 100 g/i, the dyed fabric was lightly kneaded to obtain a dyed fabric that was clear, robust, and had a good texture.

Claims (1)

[Scope of Claims] 1. In a dry transfer printing method using a cationic dye having sublimation, evaporation, or melt migration properties, (a) the transfer temperature is 200 to 220°C, and the transfer pressure is 50 to 1000 g/C;
I? The L1 transfer time is 15 to 60 seconds. (b) Apply a soft finishing treatment before or after transfer. A dry transfer printing method for acrylic synthetic fibers that requires 2. The dry transfer printing method for acrylic synthetic fibers according to claim 1, wherein the acrylic synthetic fibers are subjected to fluorescent whitening treatment in advance.