JP2002339237A - Polyester fiber whose functions have excellent durability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polyester fiber to which a functional agent and a binder can be adhered for long periods, even when a surface treatment using a special device for a plasma treatment or the like is not applied. SOLUTION: This polyester fiber having unevenness on the surface is characterized by adhering a function-developing substance to the surface of the polyester fiber through a binder having a contact angle of <=90 degree to the polyester.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber having excellent durability and functionality.

[0002]

2. Description of the Related Art Heretofore, there has been widely practiced a method of processing various functional substances into a polyester fiber cloth together with a substance having an adhesive function called a binder. However, although the fabrics obtained by these processing methods can obtain the initial functionality, the polyester fiber surface has low affinity with the binder and the adhesive strength of the binder is hardly developed, so the durability of the functionality is low. In addition, there is a disadvantage that the functional agent or the binder adhered with the use of the fabric falls off from the surface thereof, so that the function is easily lost.

On the other hand, when a sufficient amount of a functional agent and a binder for imparting the functionality is provided, the functional agent and the binder are aggregated in the inter-fiber space, and the fibers are fixed to each other and the feeling becomes hard. There are applications where both functional durability and feeling are required, that is, gentlemen, women, sportswear,
The use of polyester fibers for applications such as inner clothing has been greatly restricted.

In order to solve such problems, in order to improve the affinity between the surface of the polyester fiber and the functional agent and the binder, the fiber or the fiber structure is irradiated with plasma to modify the fiber surface, and the A method for improving the durability of processing (for example, JP-A-6-22881) has been proposed. However, there has been a problem that the plasma processing only causes a fine structural change on the fiber surface, and requires special equipment and is not versatile.

On the other hand, JP-A-9-15048 discloses that
A method is disclosed in which sericin is fixed to a filament yarn having a concave portion in its cross section without using a binder, but since the concave portion is for introducing high-viscosity sericin, its width is large. Since the fibers extend in the length direction of the fibers, there is a problem that the fixing durability of sericin is inferior.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to fix a functional agent and a binder for a long period of time without performing a surface treatment using special equipment such as plasma processing. An object of the present invention is to provide a polyester fiber which can be made to work.

[0007]

Means for Solving the Problems The present inventor has conducted intensive studies to achieve the above object, and as a result, has given a proper unevenness to the fiber surface, and has a wettability with a contact angle of 90 degrees or less to the surface. It has been determined that when a functional agent is fixed via a certain binder, a polyester fiber having excellent functional durability can be obtained, and the present invention has been completed.

That is, according to the present invention, there is provided a function characterized in that a functional substance is fixed to a polyester fiber having irregularities on its surface via a binder having a contact angle with the polyester of 90 ° or less. The present invention provides a polyester fiber having excellent durability.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The polyester fibers constituting the present invention have irregularities on the surface.

As a method for forming irregularities on the fiber surface, for example, a method in which the fiber is formed by alkali reduction during dyeing finishing is preferable. At this time, as the third component,
For example, polyalkylene glycol, polyalkylene glycol copolymerized polyester, polyalkylene glycol copolymerized polyester and metal salt derivative, sulfonic acid metal salt derivative, fine particles such as silica having a primary particle diameter of about 0.1 μm or less, phosphorus compound and metal compound It is preferable but not limited to those containing components such as internal precipitation particles.

The irregular size of the fiber surface is 0.1 to 10 μm.
m is desirable but not limited. The uneven size is 0.1
If it is less than 10 μm or less than 10 μm, the wetting angle of the binder may increase and the binder may not be uniformly attached.

As the binder for bonding the functional agent to the fiber surface, a binder having a contact angle with the polyester fiber of 90 degrees or less, preferably 70 degrees or less, more preferably 50 degrees or less is used. The reason for this is that if such a binder is attached to the surface having the above irregularities and the surface area is increased, the wetting angle can be greatly reduced, and when the contact angle exceeds 90 degrees, the wetting angle turns to increase. This is to show water repellency.

[0013] The agent for imparting fiber functionality used in the present invention includes sodium dodecylbenzenesulfonate, low molecular weight polyethylene glycol, acrylates, methacrylates, polyacrylates, polymethacrylates and the like. , Hygroscopic, water-retentive substances, medicinal properties such as aloe, cucumbers, garlic, substances with plant fragrance (plant extracts, plant proteins), bacterial culture of collagen, keratin, sericin, etc., medical treatment for wound treatment, etc. , Physiological function-imparting substances (animal proteins), electrical function-imparting substances (ceramic fine particles) for conductors such as titanium oxide, silica, alumina, zeolite, etc., octacarboiron phthalocyanine, dimethyl phthalate, organic silicon Antibacterial and deodorant substances such as quaternary ammonium and organic nitrogen compounds Fee (flavor, fragrance),
Water repellency such as a compound having a perfluoroalkyl group,
An oil-repellent substance may be appropriately used.

In particular, when a water-repellent substance such as a compound having a perfluoroalkyl group is used, a so-called lotus leaf structure is formed on a fiber surface having irregularities. The same water repellency improving effect as that of the lotus leaf structure formed by the high density fabric can be expected.

Specific examples of the binder include melamine,
Examples include epoxy, urethane, and acrylic resin-containing materials.

As a processing method, a conventionally known processing method can be arbitrarily adopted. For example, a method of applying a mixed treatment liquid of a functional agent and a binder to a cloth by a padding method, drying the cloth, and then performing a heat treatment is used. No.

[0017]

Hereinafter, the present invention will be described with reference to examples.
The present invention is not limited to this embodiment.
The physical properties in the examples were measured by the following methods.

(1) Water repellency Water repellency was measured based on the water repellency test (spray method) of JIS L1092 1998.

Example 1 As the third component, a polyester fabric (knitted fabric) using polyethylene terephthalate filaments (total denier: 111 dtex, 36 filaments) containing a metal sulfonate derivative was prepared. The fabric was alkali-reduced in a 35 g / L aqueous sodium hydroxide solution at 95 ° C. to obtain a fabric having irregularities of about 1 to 10 μm on the filament surface.

After dyeing and drying the fabric, UNICA Resin 380K (manufactured by Union Chemical Co., Ltd.) having a contact angle with polyethylene terephthalate of 67.5 degrees is used as a binder, and is repelled by a fluororesin processing agent having the following formulation. Water processing was performed. The contact angle of the binder was determined by using a biaxially stretched polyethylene terephthalate film.
The contact angle was measured by the contact angle measuring device of a. Composition of fluororesin processing agent Asahigard AG460X (manufactured by Asahi Glass Co., Ltd.) 4.0% Unicar Resin 380K (manufactured by Union Chemical Co., Ltd.) 0.1% Sumitex Accelerator ACX (manufactured by Sumitomo Chemical Co., Ltd.) 15.8% water 95.8%

As a processing method, a fluororesin processing agent was applied to the cloth by a padding method, dried at a temperature of 130 ° C., and then heat-treated at a temperature of 170 ° C. for 1 minute.

Example 2 Example 1 was carried out in the same manner as in Example 1, except that the polyethylene terephthalate filament containing the metal salt derivative was replaced by a polyalkylene glycol copolymerized polyester containing the metal salt derivative. did. When the fabric was alkali-reduced in a 35 g / L aqueous sodium hydroxide solution at 95 ° C.,
The diameter of the irregularities formed on the filament surface is about 0.1 to
1μ.

Comparative Example 1 The procedure of Example 1 was repeated, except that the sulfonic acid metal salt derivative was not contained and the alkali was not reduced. At this time, no irregularities were formed on the filament surface.

Comparative Example 2 A polyethylene terephthalate filament containing no third component (total denier 1
After producing a polyester fabric having the same structure as in Example 1 using 11 dtex and 36 filaments), the fabric was subjected to plasma irradiation processing to obtain a fabric in which a fine structural change was induced on the surface of the constituent filaments. . At this time, no irregularities were formed on the filament surface.

When the water repellency of the above polyester fabric was measured, the initial values were all class 5; however, the fabric made of the polyester fiber of the present invention (Examples 1 and 2) was The performance of repelling water droplets was remarkably excellent, and the water droplets on the fabric rolled in a spherical shape.

When the water repellency after 100 washes was measured, the fabrics of the polyester fiber of the present invention (Examples 1 and 2) maintained the third and second grades, respectively. In each of Comparative Examples 1 and 2, it was lowered to the first grade.

[0027]

According to the present invention, it is possible to obtain a polyester fiber capable of fixing a functional agent and a binder for a long period of time without performing a surface treatment using special equipment such as plasma processing.

Continued on the front page F term (reference) 4L031 AA18 AB01 AB33 BA11 CA01 DA21 4L033 AA07 AB01 AB06 AC03 AC15 BA00 CA02 CA08 CA17 CA22 CA36 CA48

Claims (3)

[Claims] An excellent function durability characterized in that a functional substance is fixed to a polyester fiber having irregularities on its surface via a binder having a contact angle with the polyester of 90 ° or less. Polyester fiber. 2. The polyester fiber according to claim 1, wherein the irregularities have a diameter of 0.1 μm to 10 μm. 3. The polyester fiber according to claim 1, wherein the functional material exhibits a water repellent function.