JP3463618B2 - Printing method for structure containing polypropylene terephthalate fiber - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing a structure containing a polypropylene terephthalate fiber, wherein the range of use of the dye is improved by color development at a low temperature, and moreover, the texture is not hardened. Especially in combination with elastic fiber,
The present invention relates to a method for printing a polypropylene terephthalate fiber-containing structure that does not have a reduction in power and is excellent in crimping properties or stretch recovery.

[0002]

2. Description of the Related Art Thermoplastic synthetic fibers typified by polyester fibers or polyamide fibers have excellent mechanical strength, chemical resistance, heat resistance, and strength / elongation characteristics, so that they can be used for clothing, industrial applications or material applications. It is widely used mainly.

Among them, polyethylene terephthalate fiber is excellent in W & W (wash and wear), dimensional stability and dyeing fastness, and various textures can be obtained by weight reduction processing by alkali treatment, which is particularly excellent for clothing. It has characteristics.

On the other hand, polyester fibers, especially polyethylene terephthalate fibers (PET), have high crystallinity and are difficult to dye, so dyeing at high temperature and high pressure is necessary, and dyeing at normal pressure is very dark. Since it is not possible to dye colors or extremely dark colors, the hue range is narrow, which is a little problem in terms of general purpose.

Since polyethylene terephthalate fiber has a large Young's modulus, in the field of materials such as carpets and car seats, the settling under a large load and the settling under a long load are large, and in this field a polyamide having a low Young's modulus is low. It is said that the type fibers are excellent. Among the polyester fibers, polypropylene terephthalate fiber (PPT) and polybutylene terephthalate fiber (PBT), which have a large number of carbon atoms in the glycol component, are suitable for this material, but like polyethylene terephthalate,
This is a field where atmospheric dyeability is not sufficient and we cannot enter.

The polypropylene terephthalate fiber has a glycol having 3 carbon atoms, has a bent structure as a fiber molecular structure, and exhibits excellent elongation recovery. However, as a dyeing method, when the temperature under the coloring condition is very high, the characteristics are not utilized, and the texture surface (curing) or the physical property surface tends to be deteriorated.

On the other hand, the same is true for textile printing. Polyethylene terephthalate fibers are difficult to dye, and color development treatment is required at high temperature.
A range of 125 ° C to 135 ° C is generally used at 180 ° C or under saturated steam. However, at that treatment temperature, the physical properties of the polypropylene terephthalate fiber are deteriorated, that is, the properties such as crimping property and elongation recovery property are impaired, and the original polypropylene terephthalate fiber property cannot be exhibited.

Therefore, at present, in a mixed product of polypropylene terephthalate fiber and other fiber, for example, polypropylene terephthalate fiber and nylon, or polypropylene terephthalate fiber and elastic fiber, or polypropylene terephthalate fiber and nylon and / or elastic fiber, polypropylene is used. There is no method that retains the excellent properties and characteristics of terephthalate fibers and other fibers and that satisfies the three requirements of high color development and high dye fastness.

[0009]

SUMMARY OF THE INVENTION In view of the background of the prior art, the present invention focuses on the step in which the deterioration of the physical properties of the fiber is the largest in the printing of the polypropylene terephthalate fiber-containing structure, and under the specific conditions. A polypropylene terephthalate fiber-containing structure that has color development properties, crimping properties or excellent elongation recovery properties, sufficient dye fixation properties, no deterioration in fiber physical properties, and high dyeing fastness by color development treatment. A method for printing a product is provided.

[0010]

The present invention employs the following means in order to solve the above problems. That is, in the printing of polypropylene terephthalate fiber containing structure, polypropylene terephthalate and feature to color treatment with saturated steam superheated steam or temperature range of 110 to 120 ° C. in a temperature range of indicia捺後140 to 160 ° C. A method for printing a fiber-containing structure.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention, as a result of earnestly studying the above-mentioned problems, revealed that in printing a polypropylene terephthalate fiber-containing structure, the polypropylene terephthalate fiber-containing structure was subjected to superheated steam in a coloring step under superheated steam. By performing the color treatment at 140 ° C. to 160 ° C. or 110 ° C. to 120 under saturated steam, the original properties of the polypropylene terephthalate fiber can be maintained, and sufficient color developability and excellent crimping properties,
Further, it was clarified that sufficient elongation recovery can be obtained, high dyeing fastness can be achieved without impairing the physical properties of the fiber, and such problems can be solved at once.

The polypropylene terephthalate fiber of the present invention is intended for a polyester having terephthalic acid as a main acidic component and trimethylene glycol (propylene glycol) as a main glycol component. Further, a copolymer system in which a part of the terephthalic acid component is replaced with another difunctional carboxylic acid component, such as isophthalic acid,
Aromatic dicarboxylic acids such as 5-sodium sulfoisophthalic acid and naphthalenedicarboxylic acid, aliphatic dicarboxylic acids such as adipic acid and sabacic acid, aliphatic diols such as tetramethylene glycol and hexamethylene glycol, 1,4-cyclohexanedimethanol and bisphenol Examples thereof include alicyclic or aromatic diols such as A.

The polypropylene terephthalate fiber of the present invention is a polyethylene terephthalate fiber, which can be spun by the same ordinary melt spinning. The cross-sectional shape of polypropylene terephthalate is not particularly limited,
For example, a normal round cross section and triangle, square, and 5 leaves (5
It may be a modified fiber or a hollow fiber.

The polypropylene terephthalate fiber of the present invention is preferably a latent crimp type conjugate fiber. This latent crimp type conjugate fiber is one that causes crimp expression by utilizing the difference in shrinkage, and the expression of the difference in shrinkage is generally under moist heat such as hot water or steam treatment and at a temperature of 70 ° C to 130 ° C. Target. Especially as hot water treatment 90 ℃ ~ 12
0 ° C. is excellent in crimp developability and is preferably used.

The composite fiber may be a core-sheath composite solid fiber or an eccentric type fiber, but a bimetal type composite fiber is particularly preferably used in terms of crimp developability or stretchability.
In the case of the bimetal type composite fiber, the combination differs depending on the purpose, and it is a combination with other polyester fibers such as polyethylene terephthalate, polybutylene terephthalate or polylactic acid, but polyethylene terephthalate is particularly excellent. The composite ratio is around 1: 1, but it is preferable that polypropylene terephthalate is contained in an amount of 20% by weight or more in terms of stretchability. In terms of hue, a combination of polypropylene terephthalate and polybutylene terephthalate, which has a similar dyeing property, is preferably used because a calm hue can be imparted without a color difference between the two or a color fluctuation.

Since polypropylene terephthalate fibers are excellent in stretchability and stretch recovery rate, stretchable nylon and / or ordinary elastic fiber (polyurethane fiber) or covering fiber of elastic fiber is preferably used as a mixed product. To be In this case, the content of the polypropylene terephthalate fiber is preferably 20% by weight or more.

The printing method of the present invention includes overprinting (direct printing) or discharge printing (including prevention).
As a printing machine, hand print, screen print,
Everything currently in use, such as rotary printing or inkjet printing, can be used.

The overprint method has a color overlap between colors, but the discharge method decolorizes the ground color with a reducing agent, so that there is no overlap between colors and the pattern is very clear. A sense of quality can be imparted.

The discharge method is roughly classified into discharge printing and discharge prevention. In the discharge printing, the ground dye is exhausted almost completely and then printed with a paste containing a reducing agent. Then, steam treatment is performed to remove the ground dyed portion, and then desizing treatment and soaping treatment are performed.

Another discharge method is called prevention, and the difference from the above method is that the ground dye is attached to the fiber structure by pad-drying. That is, the dye is basically kept in a state where it does not diffuse inside the fiber, and in that state, printing is performed with a paste containing a reducing agent. Next, steam treatment is performed to remove the color of the ground dyed portion, and desizing treatment and soaping treatment are performed. In this method, since the dye is not diffused inside the fiber, the efficiency of the reducing agent is high and the white part after bleaching is very clear (the clear white part is the same in the case of color insertion as well. It is a feature.

The discharge printing method is divided into white blanking and dressing blanking,
Whitening is mainly composed of a reducing agent and a sizing agent, and the main components of whitening are a reducing agent, a sizing agent and a dye resistant to reduction, but the whitening and the whitening are different in the reducing agent used. Soluble concrete, stannous chloride, which has a slightly weak reducing power, is generally used for the removal and removal.

After the color paste is printed, steam treatment is carried out as a coloring step.

The steam treatment referred to in the present invention is superheated steam or saturated steam, and superheated steam is obtained by heating steam and is generally called HT steam. Color processing temperature with superheated steam is 140 ℃ -160 ℃
In the range of, preferably 150 ℃ ~ 160 ℃,
The treatment time varies depending on the temperature, but is about 5 to 15 minutes. Particularly preferably, sufficient color developability can be obtained by treatment at a temperature of 150 ° C. to 160 ° C. for 5 minutes to 10 minutes.

The color development temperature in saturated steam is 110 ° C to 1
The temperature is in the range of 20 ° C. and the treatment time is about 5 to 45 minutes, preferably 15 to 30 minutes. Saturated steam is slightly superior in terms of color development and physical property retention of polypropylene terephthalate fiber.

The superheated steam and the saturated steam have the same purpose of use, but are selectively used in terms of the type, color, pattern or texture of the cloth and retention of physical properties. In general, saturated steam is mainly of batch type, and the processing time can be freely changed. Further, since saturated steam contains a large amount of water, there are few restrictions on the sizing agent, and moreover, sufficient coloring can be imparted even if the sizing layer is thick. Therefore, the applications in which saturated steam is preferably used are fields where there are many extremely dark colors, fields where tension-free processing is required, or heavy cloth. For example, in the Japanese dressing field, many relatively dark colors are required and delicate patterns are required, so that a paste having a relatively high solid content has been used for a long time. In the field of swimwear, it is generally used in combination with elastic fibers, so color development under tension is necessary as much as possible, and batch-type saturated steam is preferably used for maintaining properties.

On the other hand, the coloring treatment with superheated steam is a continuous treatment, and is characterized by a relatively short treatment time, so that low cost is possible and it is used in fields other than those mentioned above.
Currently, this is the mainstream coloring method.

Further, it is lower than the coloring temperature of the polyethylene terephthalate fiber by about 10 ° C. to 20 ° C., there is almost no mechanical stain due to sublimation of the dye, and the dye used can be expanded, which is very advantageous.

In particular, polypropylene terephthalate fibers are excellent in crimp property or extension recovery property,
Lowering the temperature of the color development processing condition is very effective in terms of maintaining the characteristics.

After printing, in order to remove the size and remove the reducing agent after the coloring, or to improve the dye fastness, washing steps such as soaping and reduction washing which are usually performed, and nylon and the like are performed. If necessary, steps such as fixing treatment, which are usually performed for the purpose of improving the dyeing fastness, may be incorporated.

As the final product, a finishing agent such as an antistatic agent, a water repellent, and a functional agent may be added.

The polypropylene terephthalate fiber-containing structure of the present invention may be 100% polypropylene terephthalate fiber, or may be a mixed product with other fibers. The polypropylene terephthalate-based fibers may be filaments or staples and can be obtained by a conventional method. The form of the fibrous structure can be appropriately selected according to the purpose, such as yarn, woven fabric, knitted fabric, and non-woven fabric. (Color measurement) Spectral color measurement system (Minolta: CM-3700)
The L * value was measured with a light source of D65 and a viewing angle of 10 degrees.
The L * value indicates a dark color with a small numerical value. (Dyeing fastness) Washing fastness is JIS-L0844 Laundermeter method, friction is JIS-L0849 Gakushin-type method,
The light resistance was evaluated by the carbon arc lamp method according to JIS-L0842. (Extension recovery rate) The sample was attached to a gripping interval of 20 cm with an initial load of 1/30 g per denier using a constant-speed elongation type tensile tester with a self-recording device, and the pulling speed was 10% of the gripping interval. And stretch it to a stress of 1.8 kg. Immediately, from the stress-strain curve recorded by unloading at the same speed, α is a constant elongation up to a predetermined elongation, and β is a recovery elongation decreased until the stress becomes equal to the initial load.

Extension recovery rate (%) = (β / α) × 100 The larger the value, the better the expansion / recovery rate. (Hysteresis loss) Obtained from the area ratio of the above SS curve, the smaller the value, the less the loss.

[0033]

EXAMPLES The present invention will now be described in more detail by way of examples.

Examples 1 to 6 and Comparative Examples 1 to 7 1500 polyethylene terephthalate fiber (PET) and polypropylene terephthalate (PPT) were used, respectively.
It was spun at m / min and stretched at 3.2 times. All the polyester fibers are 48 filaments having a fineness of 150D.

A twill fabric was trial-produced using the raw yarn, and the raw fabric was subjected to scouring and intermediate setting (160 ° C.) to prepare a sample before printing.

The printing process was carried out in the order of (1) to (4) shown below, and the coloring property was determined by the overprint method. The results are shown in Table 1.

(1) Color paste adjusting dye: Dianix Blue BBLS 3% (owp) Paste: Sunrose P-720 (15%) 40% (Nippon Paper Industries Co., Ltd .: printing paste) Water 47% ( 2) Printing / Steaming / Reducing and Washing Using the color paste of (1), a 100 mesh screen was used to give a design by a hand print method, and then color development processing was performed at a temperature of the following conditions for a predetermined time.

Superheated steam: 130, 140, 150, 1
60, 170, 180 ° C. Saturated steam: Treatment at 100, 110, 120 ° C. for 30 minutes (3) Washing with water / reducing cleaning / washing with water / drying After sufficiently washing with water, reduction washing was performed under the following conditions, followed by washing with water / drying.

Sodium hydroxide 0.5 g / l Hydrosulfite 2 g / l Nonionic surfactant 2 g / l Treatment at 80 ° C. for 20 minutes (4) As shown in the color measurement table 1, the polypropylene of the present invention method Sufficient color development is possible by the color development treatment at a temperature of 140 ° C. to 160 ° C. or saturated steam of 110 ° C. to 120 ° C. under superheated steam of terephthalate fibers. In particular, it is equivalent to or higher than the color development of the superheated steam of 180 ° C. in the current polyester fiber (PET) (Comparative Example 6), and the low temperature color development is extremely good.

[0040]

[Table 1]

Examples 1 to 6 and Comparative Examples 1 to 7
The dyeing fastness was measured using the cloth of No. 1 and the results are shown in Table 2.

With the superheated steam of the method of the present invention, 140 to 160
The dyeing fastness is good even at low temperature color development, that is, in Examples 1 to 6 in which color development processing is performed at a temperature of C and saturated steam of 110 to 120C. However, especially in polypropylene terephthalate, Comparative Example 1 and Comparative Example 7 have a low coloring temperature and the dyeing fastness tends to decrease.

[0043]

[Table 2]

Examples 7 to 12, Comparative Examples 8 to 12 Polyethylene terephthalate fiber (PET: ηr =
1.34) and polypropylene terephthalate (PPT:
A bimetal type composite fiber having a composite ratio of 50/50 composed of ηr = 1.34) was spun at 1400 m / min and drawn 3.2 times. The fineness of polyester fiber is 24 with 100D
It is a filament.

The raw yarn was knitted with a 24-gauge knitting machine. Scouring the knitted fabric, intermediate set (160 ° C),
Then, a sample before printing was prepared.

The printing process is shown in (1) to (5) below.
The treatment was carried out in the order of No. 1 to No. 3 and the extension recovery rate at a specific extension amount and the blanking property by the discharge printing method were obtained.

1. Treatment conditions (1) Ground dye and concentration Miketon Poly.Discharge Blue R 100 g / l (Mitsui Chemicals, Inc .: Disperse dye) Snow algin M 2 g / l (Fuji Chemical, Inc .: sodium alginate) Above Using the dye liquor of No. 1, the ground dye is used as a pad
0%)-Dry.

(2) Discharge paste reducing agent: 10% dechlorin solvable concrete Paste agent: High print C-50 40% (Hayashi Chemical Co., Ltd .: paste agent for discharge) Water 50% (3) Printing / steam Treatment / Reduction Cleaning Using a 100-mesh screen, a pattern was applied by a hand print method, and then steam treatment was performed under the following conditions.

130, 140 ° C., 150 ° C., 160 ° C.,
Treatment with saturated steam of superheated steam 100, 110, 120 at 170 ° C and 180 ° C for 30 minutes (4) Washing with water / reducing washing / washing with water / drying After sufficiently washing with water, reduction washing was carried out under the following conditions, followed by washing with water / drying.

Sodium hydroxide 0.5 g / l Hydrosulfite 2 g / l Nonionic surfactant 2 g / l Treatment at 80 ° C. for 20 minutes (5) Physical property measurement and color measurement As shown in Table 3, the present invention was used. Since the method is a color development process at a low temperature, there is no crimp settling and there is little stretch recovery and hysteresis roll and it is very excellent. Moreover, even at low temperatures, the whiteness in discharge printing (whitening) is greatly improved. On the other hand, under almost the same color-developing conditions as the current polyester (PET) fiber of Comparative Example (Comparative Example 11), crimping is generated and the physical properties tend to deteriorate. However, the rise in temperature improves the whiteness of the whiteness.

[0051]

[Table 3]

[0052]

EFFECT OF THE INVENTION According to the present invention, a polypropylene terephthalate fiber and textile printing are a printing method which retains the original crimp property or stretch recovery property of the polypropylene terephthalate fiber, and is excellent in color developability and dyeing fastness. Extremely high value.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-200175 (JP, A) JP-A-11-152641 (JP, A) JP-A-53-86885 (JP, A) JP-A-63- 165587 (JP, A) International publication 00/29664 (WO, A1) International publication 95/22650 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) D06P 3/52-3/56 D06P 5/20

Claims (5)

(57) [Claims] In textile printing according to claim 1 Polypropylene terephthalate fiber containing structure, a feature that color development processing with saturated steam superheated steam or temperature range of 110 to 120 ° C. in a temperature range of indicia捺後140 to 160 ° C. A method for printing a structure containing a polypropylene terephthalate fiber. 2. The method for printing a polypropylene terephthalate fiber-containing structure according to claim 1, wherein the polypropylene terephthalate fiber is a latent crimp type conjugate fiber. 3. The content of the polypropylene-terephthalate fiber is 20% by weight or more.
Alternatively, the method for printing a polypropylene terephthalate fiber-containing structure according to item 2. 4. The method for printing a polypropylene terephthalate fiber-containing structure according to claim 1, wherein the printing method is overprinting or discharge printing. 5. The polypropylene according to claim 1, wherein the polypropylene terephthalate fiber-containing structure is a mixed product of polypropylene terephthalate fiber and nylon and / or elastic fiber. A method for printing a terephthalate fiber-containing structure.