KR20030090855A - Process for open width dyeing the cotton stuff with modal mixed or mixtures - Google Patents

Abstract

PURPOSE: A dyeing method of spread blend fiber or spread mixture fabric manufactured out of modal and cotton is characterized by degrading and alkali-treating the fabric. Therefore, the dyeing method thereof is capable of dyeing the fabric under a spread condition with a cold pad batch method, improving dyeability, preventing wrinkle and giving the fabric elasticity and soft texture. CONSTITUTION: The dyeing method is as follows: degrading the fiber with a degrading agent for 20-40min. at 120-140deg.C; alkali-treating the fiber with potassium hydroxide at 15-30deg.C; and then dyeing the fiber under the spread condition at about 25-38deg.C with the cold pad batch method.

Description

[PROCESS FOR OPEN WIDTH DYEING THE COTTON STUFF WITH MODAL MIXED OR MIXTURES}

The present invention relates to a method for broadly dyeing a blend of modal and cotton fibers or a teaching fabric. More specifically, modal fibers are embrittled using embrittlement agents in a pretreatment process of blends of modal and cotton or cross-textile fabrics (hereinafter abbreviated as "modal fibers"), and alkali treatment at room temperature with alkali of 70-255 g / l. Afterwards, the dye pad method is used to dye the cold pad (cold pad batch) in a widened state, thereby blocking the occurrence of wrinkles and providing a unique elasticity and soft touch.

In recent years, modal fibers have been increasingly used because of their high elasticity and soft touch after fibrillation, in addition to being regenerated fibers made of cellulose such as cotton. However, blended or knitted fabric with cotton, which is a natural fiber, has advantages as a natural fiber, but it is very difficult to simultaneously achieve high elasticity and soft touch of modal fibers. It is known that, in particular, modal-cotton blends or textiles, once wrinkles occur, their modification is impossible, and therefore their staining is very difficult because of the increased defect rate.

In general, the dyeing method is used to remove the raw material treated inclined in the weaving preparatory process from the dough, the sieve bee is called, followed by washing with water, heat treatment, jet dyeing, fibrillation, bio Processes and tumble dry dyeing methods are known, but the dyeing rate is high and soft touch can be obtained by this dyeing method. However, since the jet dyeing process is in a rope state (Rope, wrinkled in the longitudinal direction), it is 3 to 3 Wrinkles occur during 4 hours of rotation, and the resulting wrinkles are not modifiable by heat and the blend of modal and cotton is not corrected by heat. Therefore, in the conventional general dyeing method, it is not possible to dye a blend of a modal and cotton or a woven fabric without wrinkles.

In addition, in the known method, a method of replacing with a pad pad batch dyeing process, which is processed in a broad state in order to avoid a rope state instead of jet dyeing, is a modal fiber because the maturing temperature is relatively low at about 35 ° C. Rayon, tencel, lyocell, and polyinosity are similar, but modal fibers formed with dense crystal structure have low dyeing rate and are impossible to dye in medium and deep colors, and they are not fiber embrittled, so soft touch cannot be obtained. . As such, dyeing modal fibers in a wide state to date has a low dyeing rate, making it almost impossible to dye them in medium or deep colors.In order to solve this problem, jet dyeing is impossible due to wrinkles that cannot be corrected. It has been considered that in any of the above cases, it is impossible to perform a dyeing process with a soft touch, no wrinkles, and a high dyeing rate. Because of these problems, although modal fibers have excellent physical properties, they are avoiding their use and are being replaced by similar rayon, quasilone, tencel, and the like.

As a result of earnestly researching to solve the above problems, the present inventors have to adopt wide-sized Sippybee dyeing so as not to cause wrinkles or to correct the dyed fibers in order to dye the modal fibers, and the dyeing rate due to the dyeing of the expanded state The lowering can be solved by performing an alkali treatment, and it has been found that the curing of the fiber and the deterioration of the touch due to the alkali treatment can be solved by embrittlement of the fiber, thus completing the present invention.

That is, as described above, the quality items after dyeing the modal fibers are wrinkles (A), dyeing rate (B), and touch (C). Factors affecting these items are ① sibibi staining, ② alkali treatment, ③ Each effect of the three factors on the quality items as embrittlement is shown in FIG. That is, when the ① sippybi dyeing is adopted to prevent wrinkles (A) from occurring, the modal dyeing rate is lowered, and in order to increase the dyeing rate (B), ② the alkali treatment causes the fiber to harden and harden. If the fiber is embrittled in the pretreatment process to improve the feel (C), the texture is improved but the dyeing rate is lowered again. Thus, wrinkles can be complemented by setting appropriate conditions between the wrinkles, the dyeing rate, and the triangular vertices of the touch. Dyeing method characterized by embrittlement of modal fibers with embrittlement agent, alkali treatment with potassium hydroxide, etc., and then dyeing sippy bees in a widened state in order to realize high elasticity and soft touch with no dyeing rate. To provide.

1 is an explanatory diagram showing a correlation between quality items by blending modal and cotton fibers or broad dyeing of a teaching fabric and factors affecting these quality items.

Fig. 2 shows the dye solution composition of Cibacron Yellow CR-01 55g / l, Cibacron Red C-2G 50g / l and Cibacron Blue CR 6.0g / l, and dyed modal fibers before embrittlement with Junlon. The chromaticity of the result is shown. In the meantime, the upper left side shows the laboratory dyeing result of the modal before embrittlement, the upper right side shows the staining result of the modal before embrittlement, and the lower left side shows the laboratory staining result of the quasi-ron. The results of staining in the field of Junon are shown in the photograph.

3 is a chromaticity of the dyeing composition of Sumifix Yellow S3R 15.4g / L, Sumifix Red S3B 57.7g / L, and Sumifix Blue BRF 3.35g / L, and the modal before embrittlement with Junlon Indicates. In the meantime, the upper left side shows the laboratory dyeing result of the modal before embrittlement, the upper right side shows the staining result of the modal before embrittlement, and the lower left side shows the laboratory staining result of the quasi-ron. The results of staining in the field of Junon are shown in the photograph.

Figure 4 shows a broad-dyed photograph without dyeing by alkaline treatment according to Comparative Example 1, and dyed by broad dyeing of blended fibers of modal and cotton fibers according to the method of Example 1.

FIG. 5 shows the chromaticity when the blended fibers of modal and cotton fibers were treated with KOH 225 g / l, and then dyed by broad dyeing, and Comparative Example 2 with alkali treatment with NaOH 100 g / l. It is a photograph which shows together the dyeing rate of the comparative example 3 which carried out the alkali treatment by the mixture of 200 g / l NaOH and 200 g / l KOH.

Hereinafter, described in detail with reference to the accompanying drawings as follows.

In order to improve the above technical problems, namely, (A) wrinkles, (B) dyeing rate, and (C) feel, appropriate conditions and procedures of ① sippy dyeing, ② alkali treatment, and ③ embrittlement were set.

① Scipby dyeing is necessarily adopted to prevent wrinkles, which is the most important task, and therefore the accompanying problems are solved by adjusting the conditions of other processes.

② Alkaline treatment: Cellulose fiber has the property of improving the dyeing rate by alkali treatment. The effect is obvious when it is treated at 70 g / l or more, preferably 120 g / l or more. However, the modal fiber is difficult to apply realistically because the caustic soda (NaOH) is more than 50 g / ℓ hardens the fiber as the original physical properties change. Therefore, in the present invention, an alkali treatment with potassium hydroxide (KOH) was adopted, and a proper concentration that can withstand the dye without dropping in bio processing was set.

③ Fiber embrittlement: It is certain that potassium hydroxide has less fiber hardening than caustic soda, but when treated at a concentration (70-255 g / l) that can realize high dyeing rate, the fiber becomes quite hard and the characteristics of modal fiber Since a soft touch cannot be obtained, an embrittlement process for controlling the feel by weakening the physical properties of the fiber to an appropriate level is necessary. For the embrittlement of modal fibers, immersion method was adopted in consideration of the leveling and reproducibility among various methods. The chemicals use acetic acid or embrittlement agent, and the appropriate concentration is applied according to the color. The embrittlement temperature depends on the content of the modal component in the modal fibers, but is preferably carried out at approximately 120 to 140 ° C.

④ Process Sequence: In the immersion type embrittlement method, wrinkles are likely to occur because they are processed for a long time (more than 30 minutes) at a high temperature in a rope state (crumpled state), but they are not as deadly as the wrinkles found in jet dyeing. Modifications can be made using fiber resilience. Therefore, the alkali treatment is preferably carried out after the embrittlement process, and the process is arranged in the order of fiber embrittlement, alkali treatment, and sibibi dyeing, as shown in the process diagram 3, in order not to arrange the process affecting the color after the dyeing. It was.

Important work processes are as follows.

ㆍ Fiber embrittlement

Machine: Jet Dyeing Machine

Chemical: 2-7g / ℓ embrittlement agent (adjusted according to color)

Temperature: 130 ℃

Time: 30 minutes

ㆍ Alkali treatment

Machine: Silke Machine

Chemical: Potassium hydroxide (KOH) 70-225 g / ℓ (adjusted according to the texture and texture of the fabric)

Temperature: Room temperature (25 ℃ or less)

Airing time: 30 seconds or more

ㆍ Simply Dyeing

Machine: cold pad batch dyeing machine

Moisture content: 50 to 80% (adjusted according to fabric tissue)

Temperature: 35 ℃

Aging time: 12 hours or more (adjusted according to color)

Other than the above-mentioned process, since it is known in the art, it is well known in the art for the coating, processing exploding, fibrillation, bio-processing, tumbler drying, etc., and thus the description thereof is omitted.

(Example)

Hereinafter, an Example is given and this invention is demonstrated concretely. However, the scope of the present invention is not limited to these Examples.

Reference Example 1

Junlon and modal fibrous papers were removed from the skin by scorching, then washed with water, heat treated, Sumifix Yellow S3R 15.4g / ℓ, Sumifix Red S3B 57.7g / ℓ, Sumifix Blue BRF 3.35g / ℓ After dyeing at 250 ° C. using a dye composition of 80 g / l Na ₂ SiO ₃ and 20 g / l NaOH, it was aged for 12 hours. The fibers thus dyed were fibrillated, bioprocessed and tumbler dried according to known methods. The results of the process performed in the laboratory and at the factory site are shown in FIG. 2.

In the meantime, the upper left side shows the laboratory dyeing result of the modal before embrittlement, the upper right side shows the staining result of the modal before embrittlement, and the lower left side shows the laboratory staining result of the quasi-ron. The staining results in the field of quasi-running are shown.

As shown in this figure, the quasi-bottom of the figure was dyed with dark reddish brown from 19-1338 to 19-1436 of the PANTONE Professional Color System Selector, 4th Edition, but the modal fibers on the top were 18-1844-18. -1449 is indicated. This indicates that modal fibers have a significantly lower dyeing rate than quasi-fiber fibers.

Reference Example 2

Junlon and modal fibrous papers were removed from the sieve by exfoliation, washed with water, and heat-treated. Cibacron Yellow CR-01 55g / l, Cibacron Red C-2G 50g / l, Cibacron Blue CR 6.0g The dye composition of 80 g / l Na ₂ SiO ₃ , 20 g / l NaOH, was stained at 35 ° C. and then aged for 12 hours. The fibers thus dyed were fibrillated, bioprocessed, and tumbler dried according to known methods. The results of this process in the laboratory and at the factory site are shown in FIG. 3.

In the meantime, the upper left side shows the laboratory dyeing result of the modal before embrittlement, the upper right side shows the staining result of the modal before embrittlement, and the lower left side shows the laboratory staining result of the quasi-ron. The staining results in the field of quasi-running are shown.

As shown in this figure, the quasi-bottom of the figure was dyed with dark reddish brown of 18-1531 to 18-1631 of the Pantone Chromaticity Chart, while the modal fibers on the top showed 18-1844 to 18-1449. This indicates that modal fibers have a significantly lower dyeing rate than quasi-fiber fibers.

Example 1

Modal fibrous dough was removed by swelling, removed with water, washed with water, then dried by heat treatment, and emulsifier (product name: HEXA ACID SP100, pH 2.1, manufactured by Poonglim Petrochemical Co., Ltd.) consisting of citric acid and sodium acetate. Was placed in a jet dyeing machine and embrittled at 130 ° C for 30 minutes. It was then placed in a room temperature bath of potassium hydroxide 70 g / L and aired for about 40 seconds. Subsequently, the modal fibers were taken out and washed with water, and the dye composition of Cibacron Yellow CR-01 55g / L, Cibacron Red C-2G 50g / L, Cibacron Blue CR 6.0g / L, Na ₂ SiO ₃ 80g / L, NaOH 20g / L Was stained at 35 ° C. using and then aged for 12 hours. The fibers thus dyed were fibrillated, bioprocessed and tumbler dried according to known methods. The dyeings obtained in the above process had the chromaticity shown in Fig. 4, maintaining the softness of the modal fibers, and there was no wrinkle in the modal fabric fabric after dyeing processing.

Comparative Example 1

The same procedure as in Example 1 was conducted except that the modal fibers were not alkali (KOH) treated in Example 1.

The dyeing process of Comparative Example 1 is shown in Fig. 4 together with Example 1 above. In FIG. 4, the dyeing according to the method of Example 1 was very soft compared to Comparative Example 1, and the dyeing rate was high as 18-1631, which is a deep red color of Pantone chromaticity. It can be seen that the dyeing rate is significantly reduced to 1641.

Example 2

In Example 1 the dye was replaced with a dye composition of Sumifix Yellow S3R 15.4 g / l, Sumifix Red S3B 57.7 g / l, Sumifix Blue BRF 3.35 g / l, Na ₂ SiO ₃ 80 g / l, NaOH 20 g / l, and also The dyeing treatment was carried out in the same manner except for the KOH 225 g / L treatment for alkali treatment.

As a result, the chromaticity of the alkali treated with KOH 225 g / L according to the present Example showed a good dyeing ratio with the Pantone chromaticity of 19-1629, and also the elasticity and softness inherent in the fiber were maintained, and also in the fabric after dyeing processing There were no wrinkles. This test result is shown in FIG.

Comparative Example 2

Alkali treatment was carried out in the same manner as in Example 2 except that NaOH was 100 g / l.

As a result, the dyed chromaticity of the dyed modality decreased to 18 to 1846 of the Pantone chromaticity, and the elasticity and softness of the fibers inherently decreased.

This test result is shown together in FIG.

Comparative Example 3

Alkali treatment was carried out in the same manner as in Example 2 except that KOH 200g / L and NaOH 200g / L were mixed.

As a result, the dyed color of the modal was Pantone 19-1627, but the dyeing rate was very excellent, but the elasticity of the fiber was almost lost, making it hard to use.

This test result is shown together in FIG.

From the above examples and comparative examples, sodium hydroxide cannot be used as alkali during alkali treatment, potassium hydroxide is suitable, and its concentration should be at least 70 g / l or more, and preferably 255 g / l or less of the dyeing rate and the fiber itself. Softness can be maintained.

As described above, the present invention thinks that it is impossible to dye conventional modal fibers by emulsifying modal-cotton blends and fabrics with embrittlement agents, increasing the dyeing rate by alkali treatment, and dyeing them in a broad state. It is a useful invention that prevents wrinkles and realizes elasticity and soft touch unique to the fiber by allowing the dyeing rate or the occurrence of wrinkles to be severe but the desired color can be dyed.

Claims (2)

In the method of widening dyeing after mixing the modal and cotton blend fibers or teaching materials, The fiber is embrittled for 20 minutes to 40 minutes at high temperature and vapor pressure with an embrittlement agent, alkali treated with potassium hydroxide (KOH) at 70 to 255 g / L potassium hydroxide at 15 to 30 DEG C, and widened at about 25 to 38 DEG C. A method of dyeing a blend of modal and cotton fibers or of a blend thereof, characterized by dyeing. The method according to claim 1, wherein the embrittlement temperature is 120 to 140 ° C.