JPH0641869A - Antistatic polyester textile fabric with excellent durability and its produciton - Google Patents

Abstract

PURPOSE:To obtain the fabric by introducing a specified amount of acidic groups into the surface of a polyester textile fabric followed by ionically binding specific metal atoms to the acidic groups. CONSTITUTION:The surface of a polyester textile fabric is irradiated with ultraviolet light <=300nm in wavelength at a dose of >=500ml/cm<2> to form 0.01-0.2mumol/cm<2> of acidic groups (e.g. COOH, OH) on the surface. The resultant fabric is then immersed in an aqueous solution of titanium or zirconium sulfate to ionically bind the titanium or zirconium atoms to the acidic groups, thus affording the objective polyester fabric with high color fastness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic polyester fiber cloth excellent in durability and its manufacturing method.

[0002]

2. Description of the Related Art An antistatic polyester fiber cloth is obtained by kneading an antistatic agent in a polymer and melt-spinning the fibers, or by forming an antistatic coating on the surface of the fiber cloth by post-processing.

A fiber cloth produced by kneading an antistatic agent into a polymer has problems such as a decrease in spinning property of the fiber itself, a decrease in single fiber strength and a decrease in dyeability. Further, the fiber cloth produced by a method of post-processing, for example, a method of applying an ordinary antistatic agent, has a problem that the durability against washing is poor although a temporary antistatic effect is observed. On the other hand, JP-A-58-58
There is a method of forming a coating film composed of a hydrophilic organic compound and an antistatic urethane resin on the fiber surface as disclosed in JP-A-220879. Further, as disclosed in Japanese Patent Publication No. 59-16029, there is a processing method in which an antistatic agent containing a phosphoric acid ester compound inorganic or organic salt as a main component and a silicone compound are applied. However, the fibers and the cloths produced by these methods also have poor durability and have a problem of deterioration in fastness.

[0004]

SUMMARY OF THE INVENTION The present invention solves the problems in the conventional antistatic polyester fiber cloth and the method of obtaining such an antistatic fiber cloth by post-processing, and has excellent durability and antistatic property. It is to provide a polyester fiber cloth and a manufacturing method thereof.

[0005]

The present invention provides that the surface of a polyester fiber fabric has 0.01 to 0.2 μmol / cm ² of acidic groups, and titanium or zirconium is ionically bound to the acidic groups. Characteristically excellent antistatic polyester fiber cloth, and irradiating the surface of the polyester fiber cloth with 500 mJ / cm ² or more of ultraviolet rays having a wavelength of 300 nm or less, and further immersing it in an aqueous solution containing a titanium or zirconium compound. It is a method of producing antistatic polyester fiber cloth that is characterized by excellent durability.

In the present invention, an acidic group for bonding to a fiber matrix polymer is introduced on the surface of the fiber cloth, and titanium or zirconium is ionically bonded to the acidic group. Therefore, the antistatic polyester fiber cloth of the present invention is It offers unprecedented durability. Further, as compared with the method of introducing an acidic group-containing compound by plasma treatment, the fiber group polymer containing an acidic group has a large molecular weight and is excellent in durability.

The polyester fiber cloth used in the present invention includes woven fabrics, knitted fabrics and non-woven fabrics composed of ordinary polyethylene terephthalate fibers, cationic dyeable polyester fibers, modified polyester fibers containing polyethylene glycol and the like. The antistatic polyester fiber cloth of the present invention is obtained by irradiating the surface of the polyester fiber cloth with ultraviolet rays having a wavelength of 300 nm or less and ionically binding titanium or zirconium to the introduced acidic group. Ultraviolet irradiation may be carried out by appropriately selecting a wavelength range and irradiation time capable of providing energy to such an extent that a part of the ester bond of the polymer of the fiber substrate can be cut.
It can be appropriately changed depending on the degree of polymerization of the polymer, the degree of molecular orientation, and the like.

Therefore, it is desirable that the ultraviolet ray used for the irradiation of the ultraviolet ray has an ultraviolet ray region which gives an energy of about 4 eV or more, and the ultraviolet ray needs to have a wavelength of 300 nm or less, and it is more preferable to include the wavelength of 180 to 260 nm. . As the light source, in addition to a high-pressure mercury lamp that emits a light having a wavelength of 300 nm or less, a low-pressure mercury lamp or a deuterium lamp that mainly emits ultraviolet rays having a wavelength of 300 nm or less is used. The irradiation atmosphere may be air, vacuum, or an inert gas atmosphere such as nitrogen, but irradiation in air is easy in operation and is advantageous in terms of equipment. The irradiation dose is 500 mJ / cm ² as the total irradiation dose of UV rays of 300 nm or less.
The above is necessary. By irradiating 500 mJ / cm ² or more, 0.01 to 0.2 μmol / cm ² of acidic groups are formed on the irradiated portion of the fiber surface. 0.01μ when the irradiation dose is less than 500 mJ / cm ^2.
It is difficult to secure the production amount of acidic groups of mol / cm ² or more. The upper limit of irradiation dose cannot be specified unconditionally because it depends on the wavelength characteristics of the light source, but it is about 20
It is about 000 mJ / cm ² .

In the present invention, ions of titanium or zirconium simple substance or compound are bonded to the acidic groups thus introduced by ultraviolet irradiation. Examples of the titanium or zirconium compound used in the present invention include titanium compounds such as titanium sulfate and titanyl sulfate, and zirconium compounds such as zirconium sulfate and zirconyl sulfate, which are capable of forming ions by being dissolved in water to form ions. If it is, it will not be particularly limited. The fiber cloth treated with ultraviolet rays is dipped in these aqueous solutions, and if necessary, heated to 50 ° C. or higher to ionically bond titanium or zirconium to the acidic groups. Titanium or zirconium is preferably bound in an equivalent amount corresponding to the molar amount of the acidic groups formed on the fiber surface, and 0.01 μeq / cm ² or more,
It is desirable to set it to 0.2 μeq / cm ² or less.

In the present invention, the amount of acidic groups is the number of moles (μmo) of basic dye that can be adsorbed per unit area of the surface of the fiber cloth.
It was expressed in l / cm ² ). This acidic group amount is a value determined by the following method. (1) Prepare 0.1 N sodium acetate buffer (pH = 4.5). (2) Prepare a solution of methyl violet (CIBasic Blue 1) with a concentration of 1.0 g / l using the buffer solution of (1). (3) Immerse the fiber (vertical 50 mm × horizontal 50 mm sample piece) irradiated with ultraviolet rays (wavelength of 300 nm or less) in this solution at a temperature of 25 ° C. for 72 hours. (4) Take out the fibers and wash with water. (5) After washing with water, the fiber is dried at 50 ° C. for 1 hour. (6) The dye is extracted and dissolved by immersing the fiber in N, N-dimethylformamide for 24 hours. (7) The absorbance of the dye extract is measured using light having a wavelength of 589 nm. (8) Separately, obtain a calibration curve of dye concentration with a dye solution dissolved in N, N-dimethylformamide, and calculate the basic dye concentration per unit area of fiber.

That is, the amount of acidic groups specified in the present invention means the specific adsorption capacity of the surface of the fiber cloth. Therefore, as long as the fibers on the fabric surface contain a large amount of acidic groups capable of exhibiting such adsorption ability, the distribution and type of the acidic groups are not particularly limited. The acidic groups formed on the surface of the polyester fiber cloth by the irradiation of ultraviolet rays are mainly carboxyl groups and hydroxyl groups.

[0012]

EXAMPLES The present invention will now be described in more detail with reference to examples. The measurements in the examples were performed by the following method. Antistatic: Friction electrification method JIS L 1094 B method 20 ℃ × 30% RH, measured with cotton cloth

[Example 1, Comparative Examples 1-2] Taffeta (vertical: 92) made of polyethylene terephthalate fiber 75d / 36f
Book / in, horizontal: 75 / in)
After dyeing at 0 ° C. × 60 minutes), it was irradiated with ultraviolet rays (central wavelength 254 nm) at 5000 mJ / cm ² with a low pressure mercury lamp. Then, it was immersed in a 1% by weight aqueous solution of zirconium sulfate and treated in a boiling state for 20 minutes. Then, it was washed with water and dried. As Comparative Example 1, the sample was immersed in a 1% by weight aqueous solution of zirconium sulfate without being irradiated with ultraviolet rays and treated in a boiling state for 20 minutes. Further, as Comparative Example 2, only the usual high-pressure dyeing step was performed. Table 1 shows the antistatic property and the durability of the fabric of the present invention together with the performance of the fabrics of Comparative Examples 1 and 2. As a result, it was found that the woven fabric of the present invention is very excellent in antistatic property and durability, and also has good fastness.

[0014]

[Table 1]

[Example 2 and Comparative Example 3] The same fabric used in Example 1 was exposed to ultraviolet rays (center wavelength 254n with a low pressure mercury lamp).
m) was irradiated at 5000 mJ / cm ² . Then, it was immersed in an aqueous solution of 1% by weight of titanyl sulfate and treated in a boiling state for 20 minutes. Then, it was washed with water and dried. As Comparative Example 3, the sample was immersed in an aqueous solution containing 1% by weight of titanyl sulfate without being irradiated with ultraviolet rays and treated in a boiling state for 20 minutes. Table 2 shows the antistatic property and durability of the fabric of the present invention together with the performance of the fabric of Comparative Example 3. As a result, it was found that the fabric of the present invention has excellent antistatic property and durability.

[0016]

[Table 2]

[Examples 3 to 4 and Comparative Example 4] The same woven fabric used in Example 1 was dipped in an aqueous solution of 1% by weight zirconium sulfate, with the irradiation dose of ultraviolet rays changed as shown in Table 3. After boiling treatment, washing with water and drying, the respective frictional electrification voltages were measured and shown in Table 3.

[0018]

[Table 3]

[0019]

The antistatic polyester fiber cloth of the present invention has excellent durability which is not obtained by the conventional antistatic processing, and further has good dyeing fastness. In addition, the method of the present invention,
This is an advantageous method because it can be carried out with simple steps and simple equipment.

Claims (2)

[Claims] 1. The surface of a polyester fiber fabric is 0.01 to 0.
An antistatic polyester fiber cloth having excellent durability, which has 2 μmol / cm ^{2 of} an acidic group, and titanium or zirconium is ionically bonded to the acidic group. 2. A polyester fiber cloth surface is irradiated with ultraviolet rays having a wavelength of 300 nm or less at a wavelength of 500 mJ / cm ² or more, and is further dipped in an aqueous solution containing a titanium or zirconium compound, and has excellent durability and antistatic property. Manufacturing method of polyester fiber cloth.