JPH1193080A - Finishing of polyester fiber fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a finished polyester fiber fabric, excellent in a soft touch feeling and deep color effects and having practically sufficient water repellent performances. SOLUTION: A dimethylpolysiloxane having hydroxyl groups at both terminals without any water repellency in an amount of >=1% is applied to a polyester fiber fabric dyed with a disperse dye and a fluorine-based water repellent composed of a copolymer of an acrylate having a perfluoroalkyl group in the side chain, and a vinyl compound copolymerizable therewith is then applied thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a method for processing a deep-colored polyester fiber cloth having water repellency.

[0002]

2. Description of the Related Art Polyester fibers are one of the most frequently used fibers for general clothing because of their excellent chemical and physical properties and low cost. However, natural fibers such as wool and silk can be used because polyester fibers have a large refractive index of light and a large surface reflection, and have a dense molecular structure and cannot be dyed with dyes other than disperse dyes.
Reproduced fibers such as rayon and acetate, acrylic fibers, and the like have the drawback of being inferior in color development and sharpness.

In recent years, ultra-fine and ultra-fine polyester fibers have been developed. However, ultra-fine and ultra-fine polyester fiber cloths have a large surface reflection of light as compared with conventional polyester fiber cloths, and therefore have a white hue. There is a problem that a large amount of dye must be used in order to develop a visible and deep color and to develop a dark color, resulting in poor color fastness. However, ultra-fine and ultra-fine polyester fiber fabrics are highly valued for their unique feel, surface feel, and functionality, and are widely used from general clothing such as slacks, coats, suits, and sports clothing. It has been required more than ever to maintain the feeling unique to ultra-fine polyester fiber fabrics, increase the color depth of the hue, and impart appropriate water repellency.

[0004] Conventionally, the following four methods have been studied for the deepening of polyester fibers. First,
When a polyester is polymerized from ethylene glycol and phthalic acid, a method for modifying a polymer which can be dyed with an ionic dye by mixing a monomer having a sulfone group such as sulfoisophthalic acid (JP-A-37-1214)
No. 9) and secondly, a method of roughening the fiber surface by reducing the weight of a polyester fiber woven fabric in which inactive inorganic fine particles are dispersed during the production of polyester (JP-A-43-118).
No. 28) or a method of roughening the fiber surface of a polyester fiber cloth by low-temperature plasma treatment (for example,
No. 35692), and thirdly, a method of limiting reflected light by making a polyester fiber into a bulky yarn by false twisting or the like (for example, JP-A-61-275430).
There is a method of coating fibers with a low refractive index compound such as a fluorine-based compound, a silicon-based compound, and a urethane-based compound (for example, JP-A-55-26232).

However, the above first, second and third methods cannot be applied to general-purpose polyester fibers.
Alternatively, there is a problem that the cost is increased. In the fourth method, in order to combine the advanced deep color performance and the appropriate water repellency, a large amount of the low refractive index compound to be coated must be provided. There was a problem that the feel of the fiber fabric became hard.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended to produce a polyester fiber cloth having a soft feeling, water repellency, and a deep color. It is intended for.

[0007]

The present invention achieves the above object and has the following construction. That is, the present invention provides a polyester fiber cloth dyed with a disperse dye to a dimethylpolysiloxane-based resin liquid having hydroxyl groups at both ends and having no water repellency of 1% or more in terms of solid content with respect to the fiber weight. After drying and heat treatment, an aqueous emulsion of a fluorinated water repellent consisting of a copolymer of an acrylate having a perfluoroalkyl group in the side chain and a vinyl compound copolymerizable therewith is applied, followed by drying and heat treatment. The gist is a method for processing a polyester fiber cloth.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. In the present invention, a polyester fiber cloth dyed with a disperse dye is used as a cloth to be processed. The polyester fiber cloth as used herein refers to a fiber formed into a fiber shape by a melt spinning method using a fiber-forming polymer formed from glycols and carboxylic acids, for example, a polymer mainly composed of polyethylene terephthalate or polybutylene terephthalate. Woven fabric, knitted fabric, non-woven fabric, etc.

This polyester fiber cloth is used after relaxing, scouring, presetting and dyeing with a disperse dye by a conventional method. The disperse dye used here is a benzoazo-based, heterocyclic azo-based, anthraquinone-based, or condensed-based compound that is hardly soluble in water and is a usual disperse dye used for dyeing acetate fibers, polyester fibers, and the like. When the polyester fiber cloth is used for applications such as women's blouses and coats, it may be subjected to weight reduction processing, raised processing, or the like.

In the present invention, using the above-mentioned polyester fiber cloth, as a first step, a non-water-repellent dimethylpolysiloxane-based resin solution having a hydroxyl group at both ends is added to a 1% solid content in terms of fiber weight. Apply, dry and heat treat. Dimethylpolysiloxane resin is a powder of metallic silicon to which a catalyst such as copper is added, and methylene chloride and about 3
The dimethyldichlorosilane extracted and purified from the methylchlorosilane obtained by reacting at a high temperature of 00 ° C. is hydrolyzed to form dimethylsilanediol, and furthermore, dimethylsilanediol is subjected to a dehydration-condensation linear dimethylsilane. A resin containing polysiloxane as a main component.

In the present invention, the dimethylpolysiloxane resin must have hydroxyl groups at both ends and have no water repellency. As a dimethylpolysiloxane-based resin satisfying such characteristics, a poly (1,1-dimethylsiloxane) compound having hydroxyl groups at both ends can be mentioned. As a specific commercially available product, Color Improver 520C (Nissin Chemical Co., Ltd.) Products).

In the present invention, a polyester fiber cloth dyed with a disperse dye is coated with a dimethylpolysiloxane-based resin solution having hydroxyl groups at both ends and having no water repellency in an amount of 1% or more in terms of solid content based on the fiber weight. It is applied, dried, and heat-treated. If the applied amount is less than 1%, the desired deepening effect cannot be obtained. As a method for applying the dimethylpolysiloxane-based resin liquid to the fiber cloth, there are a padding method, a spray method and the like. The fiber provided with the dimethylpolysiloxane resin is dried in dry heat and wet heat. The dried fiber fabric is heated at 160-180 ° C in dry heat
Heat treated for 2 minutes.

After the heat treatment, in the present invention, as a second step,
An aqueous emulsion of a fluorinated water repellent comprising a copolymer of an acrylate having a perfluoroalkyl group in the side chain and a vinyl compound copolymerizable therewith is applied, dried and heat-treated. The acrylate having a perfluoroalkyl group is a compound represented by the following general formula 1 and which imparts water repellency to fibers.

[0014]

Embedded image

[Where R _f is C _m F _{2m + 1} (where m
Is an integer of 2 to 21), and n is an integer of 10 to 200. Examples of the compound copolymerizable with the compound represented by the above general formula include vinyl compounds such as acrylic acid, methacrylic acid, styrene, and vinyl chloride. Examples of a method for applying an aqueous emulsion of a fluorine-based water repellent to a fiber fabric include a padding method and a spray method. The fiber provided with the water-based emulsion of the fluorine-based water repellent is dried in dry heat or wet heat. The dried fiber fabric is dried for 1 hour.
Heat treated at 60-180 ° C for 1-2 minutes. This heat treatment may be performed in combination with a normal finishing set.
The present invention has the above configuration.

[0016]

According to the present invention, a dimethylpolysiloxane resin solution having hydroxyl groups at both ends and having no water repellency is added to a polyester fiber cloth dyed with a disperse dye at a solid content of 1% based on the fiber weight. When the above is applied, the transparency and low refraction of the dimethylpolysiloxane resin film suppress the reflection of light incident on the surface of the fiber fabric, and as a result, the sharpness and the deep color of the fiber fabric increase, and Since the dimethylpolysiloxane resin film used here does not have water repellency, it can be subjected to two-step processing such as water repellent processing. As the water repellent, an acrylate having a perfluoroalkyl group in the side chain and an acrylate When a water-repellent process is performed using a water-based emulsion of a fluorine-based water repellent made of a copolymer of a vinyl compound that can be copolymerized with water, the water-based emulsion of the fluorine-based water-repellent is excellent. In addition to the transparency of such water repellency, it has a low refractive, sharpness of fiber fabric, it is possible to impart water repellency performance fiber fabric without impairing the bathochromic.

Further, the dimethylpolysiloxane resin film has both low surface friction and flexibility.
The presence of the dimethylpolysiloxane-based resin film between the fiber cloth and the hard fluorine-based water-repellent film makes it possible for the hard fluorine-based water-repellent film to prevent untreated fibers without hindering the movement of the fiber cloth. It becomes possible to give a feeling close to that of a fabric.

[0018]

EXAMPLES Next, the present invention will be described in more detail with reference to examples. Measurement and evaluation of the performance of the fabric in the examples were performed by the following methods. (1) Deep-color property Using a Macbeth spectrophotometer CE3100 (manufactured by Sakata Inx Co., Ltd.), the reflectance of the fiber cloth is measured with a C light source and a visual field of 2 degrees, the L value is calculated by the color difference formula of Hunter, and the cloth depth The color effect was evaluated. The smaller the L value, the greater the deep color effect. (2) Water repellency Measurement and evaluation were performed according to JIS L-1018 (spray method). (3) Hand handling The following three grades were relatively evaluated by handling. ○ Soft △ Normal × Hard

Examples 1 and 2 Polyester bulky processed yarn (semi-dal) 300d / 48f
To warp, polyester bulky processed yarn (semi-dal) 230
A twill fabric (warp density: 94 / inch, weft density: 57 / inch) prepared by weaving d / 48f as the weft is prepared, scoured, relaxed, preset and DIA according to a conventional method.
NIX BLACK RB-UP (manufactured by Dystar Japan Co., Ltd., disperse dye) at 130 ° C. with 20% owf
Dyed for 1 minute, washed with normal reduction, dried at 120 ° C., and dyed in black polyester fiber fabric (warp density 112
Per inch, and a weft density of 68 per inch).

As a first step, each of the woven fabrics is individually immersed in a dimethylpolysiloxane-based resin solution having hydroxyl groups at both ends and having no water repellency as shown in Formulations 1 to 3 in Table 1, and a 100% pickup. After the squeezing, the resin was dried at 120 ° C. for 1 minute and heat-treated at 170 ° C. for 1 minute to obtain 0.5% by weight (Comparative Example 1) and 1.0% by weight (Example 1) of the above resin in solid content. , 2.0% by weight (Example 2).

[0021]

[Table 1]

Next, as a second step, a water-based emulsion of a fluorine-based water repellent comprising a copolymer of an acrylate having a perfluoroalkyl group in a side chain and a vinyl compound copolymerizable therewith is prepared as shown in Formula 4 below. After immersion, squeezing with 100% pickup, drying at 120 ° C for 1 minute,
A heat treatment at 70 ° C. for 1 minute was performed to obtain a processed fabric of the present invention and a comparative fabric. Prescription 4 Asahigard AG970 6 parts (manufactured by Meisei Chemical Co., Ltd., fluorine water repellent) 94 parts water

The performances of the present invention and the processed fabric for comparison were measured and evaluated, and the results are shown in Table 2.

[0024]

[Table 2]

As is clear from Table 2, when the dimethylpolysiloxane resin is fixed at 1.0% by weight or more, the processed fabric of the present invention satisfies the deep color effect, and has good water repellency and feeling. I understand.

For comparison with the present invention, the first step using the dimethylpolysiloxane-based resin solution in Example 1 of the present invention in which 1.0% by weight of the dimethylpolysiloxane-based resin was adhered using Formulation 2 Comparative Example 2 (Comparative Example 2) was obtained in exactly the same manner as in Example 1 except for omitting. Further, a processed cloth for comparison (Comparative Example 3) was obtained in the same manner as in Example 1 except that the second step using the fluorine-based water repellent was omitted in Example 1. For reference, an unprocessed fabric (Comparative Example 4) was collected immediately before the first step, and provided for comparison with the present invention.

The performance of the present invention and the comparative fabric were measured,
The results were evaluated and the results are shown in Table 3.

[0028]

[Table 3]

As is apparent from Table 3, the processed fabric produced by the method of the present invention has excellent deep color and water repellency,
The texture of the fabric was also good, close to that of the untreated fabric.

[0030]

As described above, the polyester-processed fabric produced by the production method of the present invention has an excellent deep-color property, so that it can express a hue that cannot be expressed by a conventional polyester fiber fabric. Since the fabric has a flexibility close to that of an untreated fabric, it is possible to provide a fiber fabric with high fashionability. Further, the polyester fabric produced by the production method of the present invention has practically sufficient water repellency, so that it can be applied to a wide range of uses such as suits, slacks, coats and blousons.

Claims (1)

[Claims] 1. To a polyester fiber cloth dyed with a disperse dye, a dimethylpolysiloxane-based resin liquid having hydroxyl groups at both ends and having no water repellency is applied in an amount of 1% or more in terms of solid content based on the fiber weight, and dried. After heat treatment, an aqueous emulsion of a fluorinated water repellent comprising a copolymer of an acrylate having a perfluoroalkyl group in the side chain and a vinyl compound copolymerizable therewith is applied, dried and heat-treated. Processing method of polyester fiber cloth.