JPS61146884A - Dyeing of hydrophobic fiber material - 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] [Industrial Application Field] The present invention is a method for continuously dyeing hydrophobic fiber materials, particularly hydrophobic fiber materials containing polymeric elastomers, with disperse dyes in a level and deep color. It is about the method.

[Prior art]

The continuous dyeing method for textile materials made of hydrophobic fibers has many advantages compared to the dyeing method, such as speeding up processing, energy saving, and mass production of uniform products. Even if you pad the dye containing the
The fibers are difficult to wet, and the dye migrates during drying, making it impossible to obtain uniformly dyed products. In particular, in recent differentiated composite materials, especially fiber materials containing polymeric elastomers, the affinity for dyes differs among the constituent fibers, resulting in uneven adhesion and irritability.

To solve these problems, glues made of natural polymers such as sodium alginate, gum arabic, and glue are generally used. It has the disadvantage of lack of level dyeing properties as it changes significantly and causes the dye to aggregate.

In order to avoid such drawbacks, the use of polyacrylamide (Japanese Patent Publication No. 37-5291), sulfomethylated polyacrylamide (Japanese Patent Publication No. 39-21996), and glycerin fatty acid esters with ethylene oxide added (Japanese Patent Publication No. 37-5291) have been proposed. 59-38356> and oxyethylene oxypropylene block polymer
486> and the like have been proposed, but even these methods cannot achieve satisfactory level dyeing and dark color effects in continuous dyeing.

[Problem that the invention seeks to solve]

The present invention improves dyeing of hydrophobic fiber materials, particularly hydrophobic fiber materials containing polymeric elastomers, and achieves fast and uniform dyeing without dye aggregation.

[Means for solving problems]

A method for dyeing a hydrophobic fiber material, which comprises, when continuously dyeing a hydrophobic fiber material with a disperse dye, applying a dye solution containing a higher fatty acid ester compound of polyglycerin to the fiber material, and then heat-treating the material. .

Hydrophobic fibers applicable to the present invention include polyester,
There are hydrophobic synthetic spas based on polyamide, acetate, and polyacrylonitrile, and these fibers may be used alone or in combination, or they may be mixed fibers with hydrophilic fibers containing a high proportion of hydrophobic fibers. Further, the form of these fiber materials may be cotton-like, thread-like, knitted fabric, or non-woven entangled structure.

The method of the present invention exhibits the latter group of effects when the hydrophobic fiber material contains an elastomer polymer. Such polymeric elastomers include those commonly referred to as polymeric elastomers. Examples include polyurethane polymers, polyacrylic polymers, silicone polymers, fluorine polymers, synthetic rubber, and natural rubber. Among these, polyurethane polymers have excellent flexibility and toughness, and are suitable for the present invention. Typical examples of fiber materials containing such polymers include structures such as artificial fur and human varnished materials, but there is no need to limit them to these.

The disperse dye used in the present invention is a dye used for dyeing by dispersing it in water using a dispersant such as a disperse dye or a vat dye, and it may also be a dye that contains a dispersant in advance like a commercially available disperse dye. It may be a dye that does not contain a dispersant and a dispersant is added thereto at the time of use, or it may be a complex salt dye that has extremely low solubility in water.

The higher fatty acid ester of polyglycerin used in the present invention can be represented by the following general formula.

RlC-0-(CH2-CH-CH20). R3 coconi, R2 is a C9-C22 (preferably 011-C21) aliphatic acyclic hydrocarbyl group, and R2 and R3 are hydrogen and C8-C24 (preferably 012
~C2□) selected from the group consisting of aliphatic alkyl groups,
And n is 2 to 20. Preferably it is 2-12, more preferably 2-8.

The fatty acid esters of polyglycerols mentioned above are well-known compounds and are generally widely used as emulsifiers in food products. The ester can be produced by known methods such as esterification reaction between polyglycerin and fatty acids, transesterification reaction between polyglycerin and fats and oils, transesterification reaction between polyglycerin and fatty acid methyl or ethyl ester, addition of glycidol to fatty acid. It can be produced by a polymerization reaction or the like.

The fatty acids used in the esterification are, for example, chain length fatty acid mixtures such as aliphatic mixtures derived from coconut oil or tallow, or synthetic fatty acids. Preferably, the fatty acid is a saturated fatty acid, about 11 to 12
It is preferable to contain carbon atoms of . Fatty acid mixtures derived from natural fats and oils such as rapeseed oil, fallen beef oil, lard, tallow, coconut oil, soybean oil, etc. can be softened to saturated form by well-known hydrogenation.

The polyglycerol fatty acid ester used in the present invention can be completely esterified, that is, all available water-waxing groups can be esterified. However, the degree of esterification is about 20~
It is preferable that 60% of the hydroxyl groups be esterified.

Specific examples of polyglycerin fatty acid esters suitable for use in the present invention include tetraglycerin monolaurate, tetraglycerin monooleate, tetraglycerin monostearate, hexaglycerin monolaurate, hexaglycerin monoolein. Acid ester, hexaglycerin monostearate, decaglycerin monolaurate,
Examples include decaglycerin monooleate.

The amount of polyglycerol fatty acid ester used in the present invention is preferably 0.05 to 0.50% by weight, and less than 0.05% by weight, based on the padding bath made of the aqueous dispersion of disperse dye. If it is absent, the sufficient effect will not be exhibited, and if it exceeds 0.5% by weight, not only will the effect remain the same, but it will be disadvantageous in terms of cost.

In addition to these polyglycerin fatty acid esters,
It is permissible to use other chemicals in combination as long as they do not impede the effect, and include thickeners, reduction inhibitors, pH adjusters, dye solubilizers, antifoaming agents, etc. that are commonly used in padding baths for disperse dyes. The use is not limited in any way.

If the specified compound of the polyglycerol fatty acid ester used in the present invention is difficult to dissolve in water, it can be adjusted by adding a solvent or solubilizer while being careful not to inhibit dyeability.

In the dyeing method of the present invention, methods for attaching the dye solution containing the dye to the hydrophobic fiber material include printing, padding, dipping, coating, and spraying, which can be used depending on the intended purpose. The effect is even more pronounced when applied to the ding method.

After applying the dye, dry it in the usual way.

For materials that do not require drying, a direct color development fixation step is performed, and the method may be a thermosol method, superheated steam method, or saturated steam method, which can be used depending on the type of fiber material.

〔Example〕

Example 1 16 islands of sea-island type polymer mutual array fibers (3, 8d, 51nvn, with Ken stripes) using 57% polyethylene terephthalate as the island component and 43% polystyrene as the sea component. Staples were sufficiently needled to form a cross-wrap web. Punched and got felt. This was introduced into a hot bath of 12% partially saponified polyvinyl alcohol, shrinked and glued at the same time, and dried. The sea component polystyrene was slowly removed from this sheet with trichlorethylene, dried, impregnated with a 12% polyurethane dimethylformamide solution, squeezed, then coagulated in an aqueous bath, washed thoroughly with warm water, and then The applied polyvinyl alcohol and dimethylformamide solvent were removed, and after drying, it was sliced into two pieces. Next, this was puffed, the surface was fluffed, and 65% polyester fiber with a single yarn fineness of 0° and 16 denier was formed.
A gray fabric of suede-like artificial leather made of 35% polyurethane was obtained.

This greige was passed through the following padding bath, passed through it twice with a mangle (Shore hardness: 80°), and after squeezing to a squeezing rate of 70%, it was dried at 120'C in a blow dryer.

Next, color fixation was carried out in superheated steam at 180'C for 5 minutes, followed by ordinary reduction washing and drying.

Padding bath composition: Dye CI DisperseRed 152 10
C]/ffCl DisoerseBlue 16
5 10q/Qph regulator Benzoic acid 0
．． 5Q/D.

Leveling agent 5Q/ff The results of the examples are shown in Table 1.

In addition, the color development property, migration property, and uniformity of the dyed surface were judged based on the following criteria.

(1) Color development: Using a Macbeth spectrophotometer for dyed cloth, the apparent color density /S was determined. The larger the K/S value, the darker the color.

(2) Migration property: The end face of the dyed fabric was sliced diagonally with a razor blade, and the surface density and internal density were determined using a gray scale for color change and fading.

(3) Uniformity of dyed surface: The quality of the dyed surface after dyeing was compared with that without additives and judged visually.

○: No irritation in hue was observed.

Δ: Slightly uneven hue is observed.

X: Significant hue irritation is observed.

In the table, Nos. 1 to 3 indicate comparative examples, and as is clear from the table, the method of the present invention yields a dyed surface with superior uniformity compared to the comparative examples, and has excellent color development and migration properties. It was also possible to obtain excellent dyed products.

Example 2 Using the suede-like artificial leather of Example 1, the same method as in Example 1 was carried out except that the leveling agent, tetraglycerin monolaurate, which was good in Example 1, was added in the padding bath in different amounts. It was judged. The results are shown in Table 2.

As is clear from the table, the leveling agent used in the present invention is
By adding a small amount to the padding bath, products with excellent appearance quality were obtained.

〔Effect of the invention〕

According to the present invention, hydrophobic fiber materials can be dyed evenly and continuously in deep colors with disperse dyes without problems such as migration during the drying process, fixation rate during color fixation, and uniformity of the dyed surface.

Claims (1)

[Claims] A method for dyeing a hydrophobic fiber material, which comprises, when continuously dyeing a hydrophobic fiber material with a disperse dye, applying a dye solution containing a higher fatty acid ester compound of polyglycerin to the fiber material, and then heat-treating the material. .