KR20090021566A - Manufacturing of nylon fiber and the preparation thereof with ultraviolet(uv) protective and quick-drying property - Google Patents

Abstract

Nylon fiber having an ultraviolet lays protecting property, a sweat absorbing and quick-drying property and a manufacturing method thereof are provided to manufacture the fiber economically and simply by improving the property of the fiber. Nylon fiber having an ultraviolet lays protecting property, a sweat absorbing and quick-drying property comprises a step for mixing and adding nano-silver and zinc oxide of which range are 5 - 100nm in a polyamide based polymer melt and a step for spraying the melt through a spinneret of a žª typed shape. Weight of the nano-silver and the zinc oxide is 0.001 - 2.0 weight%.

Description

Manufacturing of nylon fiber and the preparation of the invention with ultraviolet (UV) protective and quick-drying property}

The present invention relates to a method for producing UV-absorbing and sweat-absorbing fast-drying nylon fibers, and more particularly, in the manufacture of nylon fibers, in order to maximize the absorbing quick-drying by adjusting the ratio of the surface area to the volume of the fiber and melt the polyamide-based polymer The nano-silver and zinc oxide (ZnO) in the range of 5 to 100nm in diameter is mixed and added, and is produced through the spinneret of the king-shaped cross-sectional shape to manufacture UV-resistant and sweat-absorbent quick-drying nylon fibers It is about a method.

As the standard of living has recently improved, the public's interest in sports and leisure activities has gradually increased, and as the population enjoying various leisure and sports has soared, functional fiber materials with quick-drying properties that absorb and dry sweat emitted during human activities are well absorbed. Development is required.

Existing methods for absorbing quick-drying yarns have been proposed chemical methods for adding hydrophilic polymers during chip production and physical methods for imparting absorbency by forming capillaries between or within fibers by controlling the cross-sectional shape of the fibers.

The method of imparting sweat absorption quick drying by the modification of the polymer is to secure hollow in the fiber cross section and microporous of the fiber surface. That is, by forming the fine holes in the fiber side or inside the fiber is designed so that these micro holes are connected to the fiber surface to absorb and disperse sweat by the capillary phenomenon of the fiber.

However, the fiber produced by this method can absorb a large amount of water, but the moisture contained in the micropores is difficult to escape and has a disadvantage in that the drying speed is lowered. As it acts as a deterioration in the physical properties is inevitable.

On the contrary, by deforming the cross section of the fiber, the filaments form a channel that functions as a capillary tube when the filaments are focused, thereby providing absorbency by capillary performance, and the absorbed water is physically bonded to the fiber surface, thus preventing deformations such as twisting and the like. It can be easily discharged to induce quick drying.

This method can impart quick drying properties without the need for additional work such as modification of the polymer. In the case of the hollow fiber which is physically manufactured without micropores on the fiber side of the fiber of the cross section, the hollow part serving as the capillary tube is closed in the longitudinal direction of the fiber, and thus it is difficult to exhibit substantial absorption and quick drying.

In addition, as the possibility of damage of ultraviolet rays increases due to the destruction of the ozone layer in the air, a lot of technologies for manufacturing UV blocking clothing having a function to protect the human body from ultraviolet rays have been developed.

In the method of manufacturing such garments, there is a post-processing method of coating or laminating a sunscreen on a fabric, etc. This method is simple and easy, but the effect is lowered during use or by washing, and the sunscreen is absorbed to a fiber or a fabric Since it is manufactured by coating on the surface, there are disadvantages in that the physical properties are poor, the feel is poor, and the durability and the laundry resistance are poor.

In addition, there is a method of incorporating a sunscreen in the fiber, which is a method of uniformly incorporating a blocker during polymerization or spinning, so that the blocker is uniformly mixed in the yarn, unlike the above-mentioned post-processing method, there is almost no effect reduction in use. have.

Such sunscreens include organic and inorganic (ceramic), which are mostly known as harmful substances to the human body and are difficult to use in clothing. On the other hand, some inorganic materials such as silver, TiO ₂ and ZnO are widely used because they are known to be safe for the human body.

In general, as the content of the blocking agent increases, the blocking effect also increases proportionally.However, in the case of the inorganic blocking agent, the blocking performance improves as the content increases, while the wear of the machine or the guide increases during the weaving process, and the physical properties of the thread and the fabric Worse Therefore, countermeasures should be taken when increasing the blocker content.

In general, the sweat-absorbing quick-drying means the ability to easily absorb and transfer moisture emitted from the human body to the fiber surface by capillary phenomenon, to diffuse it within a short time, and to quickly dry it. The UV-blocking property is 290 to 400 nm, which is the ultraviolet region of the solar flux. Means the ability to block light in the wavelength range.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object of the present invention is to provide a unique channel for maximizing the absorbent quick-drying on the UV protection and fiber cross-section and the UV-absorbing quick-drying nylon fibers and its It is to provide a manufacturing method.

The object of the present invention is to mix and add 0.001 to 2.0% by weight of nano silver and zinc oxide having a diameter in the range of 5 to 100 nm to a polyamide polymer melt,

This is a rod-shaped first slit whose end is circular at the width of W ₁ and the length of L ₁ , and horizontally with the first slit at the width of W ₂ and the length of L ₂ , the center of which is the first slit. Two second slits arranged on the same extension line as the center, and two third slits connecting the center of each of the second slits and the center of the first slit with the width of W ₃ and the length of L ₃ are deformed. The area ratios of the first, second and third slits, which are composed of a cross-sectional shape in the shape of a king, are achieved by spinning using a spinneret that satisfies a specific equation.

As described above, according to the UV-blocking sweat-absorbing quick-drying nylon fiber according to the present invention and a method for manufacturing the same, the manufactured nylon fiber has a sunscreen of 0.5 to 5 deniers with a UV blocking rate of 96.5% or more, and an absorbency and drying property of 50% or more. Therefore, it is possible to easily and economically produce a fiber having the characteristics of the UV blocking ability and the moisture absorption quick drying.

Hereinafter, the ultraviolet ray absorbing quick-drying nylon fiber according to an embodiment of the present invention and a manufacturing method thereof will be described in detail.

The polymer used in the present invention is a polyamide polymer.

To the melt obtained by melting the polyamide-based polymer at a temperature of 255 ° C to 265 ° C, fine particles of nano silver and zinc oxide having a diameter in the range of 5 to 100 nm are mixed and added.

The amount of the fine particles added is insufficient UV blocking effect when the content of nano silver and zinc oxide is less than 0.001% by weight, and is not economical at more than 2.0% by weight.

The polyamide-based polymer melt containing the fine particles is extruded through a spinneret having a king-shaped cross section.

The fiber spun through the spinneret having the cross-sectional shape exhibits excellent sweat absorption and quick drying because of its large capillary function.

1 is a cross-sectional view of the spinneret used in the method for manufacturing the sweat-absorbing quick-drying nylon fiber according to an embodiment of the present invention, the method for producing the sweat-absorbing quick-drying nylon fiber according to an embodiment of the present invention is the width of W ₁ The first slit having a length of L ₁ , _{two second} slits having a width of W ₂ and a length of L ₂ and two third slits having a width of W ₃ and a length of L ₃ are modified. It is configured in the shape of a cross section.

First, a spinneret satisfying the following formula 1 is used for the area of each configuration in the shape of a king-shaped cross section in which the first slit, two second slits, and two third slits are deformed.

W ₁ L ₁ : W ₂ L ₂ : W ₃ L ₃ = a: b: 1

'W _i ': width of the first i slit, 'L _i ': length of the first i slit (where i = 1, 2, 3),

'A' is a real number satisfying 3.0 ≦ a ≦ 5.5, and 'b' is a real number satisfying 1.5 ≦ b ≦ 3.5.

In this case, the second slit may be formed of a circle or an ellipse corresponding to the same area.

The present invention is applied to the general spinning process using the spinneret as a raw material of the polyamide-based polymer melt mixed and added with 0.001 to 2.0% by weight of nano silver and zinc oxide in the range of 5 to 100nm in diameter, the final fiber The single yarn fineness of the present invention relates to a method for producing a moisture-absorbing quick-drying nylon fiber having a UV blocking rate of 96.5% or more, an absorbance of 50% or more, and a drying property of 50% or more in 0.5 to 5 denier.

In the above formula, if the 'a' and 'b' values exceed the allowable range, the formation of the channel is insufficient, and the shape or malformation is not obtained, and thus the desired result cannot be obtained.

For the purpose of illustrating the present invention in more detail with reference to the following examples, the following examples are for the purpose of explanation and are not intended to limit the invention.

In the Examples and Comparative Examples of the present invention, the measurement of physical properties and the evaluation of radioworkability were as follows.

1) Absorption: The weight of the sample increased after absorption compared to the original sample weight for the same time.

2) Drying: The weight of the sample after drying in relation to the weight of the sample sufficiently absorbed for the same time is expressed in weight%.

3) UV protection: It is evaluated by the test method 'Test method of UV protection rate and blocking index of textile products (KS K 0850)'.

-UV protection rate is calculated as

UV protection rate (%) = 100-UV transmission rate (%)

 T: spectral transmittance at wavelength λ

The UV protection index is calculated as follows.

E _λ : erythema coefficient at each wavelength,

_Sλ : sunlight at 40 ° north latitude, ultraviolet ray 20 °, each wavelength at midsummer midday,

T _λ : transmittance,

Δ _λ : measurement wavelength spacing,

λ: wavelength

4) Evaluation of radioworkability

The radiation workability was evaluated based on the number of trimmings during spinning. If the thread was less than 1 time / day, it was determined to be good, 1 to 3 times / day, normal, and more than 3 times / day to be bad.

<Example 1>

Spinning rate using a spinneret having an area ratio of the first to third slits of 4.7 to 2.3: 1 in the present invention using a polyamide polymer melt containing 0.1 wt% of nano silver and zinc oxide having a diameter of 75 nm 85 denier fibers were prepared at 4500 m / min, and the results are shown in Table 1.

<Example 2>

The same conditions as in Example 1 were carried out except that the content of nano silver and zinc oxide was 0.05% by weight.

Example 3

Nano silver and zinc oxide were carried out under the same conditions as in Example 1 except that the content was 2% by weight.

<Comparative Example 1>

The same conditions as in Example 1 were carried out except that the content of nano silver and zinc oxide was 0 wt%.

<Comparative Example 2>

The same conditions as in Example 1 were conducted except that the contents of the nano silver and the zinc oxide were 0.009% by weight.

<Comparative Example 3>

The same conditions as in Example 1 were carried out except that spinnerets having a circular cross-sectional shape were used.

 Example 1  Example 2  Example 3  Comparative Example 1  Comparative Example 2  Comparative Example 3      Absorbency (%)    84.7%    85%    85%    85%    85%    34%      Dryability (%)    93%    93%    92.5%    93%    93%    42%   UV protection rate (%)    97%    71.5%    97.3%    60.4%    64.3%    95.9%      UPF Index    50+     5.1    50+     3.6     3.8    50+     Radiation workability    Good    Good    usually    Good    Good    Good

1 is a cross-sectional view of the spinneret used in the method for producing a sunscreen absorbent quick-drying nylon fiber according to an embodiment of the present invention.

          <Explanation of symbols for the main parts of the drawings>

W ₁ : width of first slit L ₁ : length of first slit

W _2: width of the second slit L ₂ : length of the second slit

W _3: width of third slit L ₃ : length of third slit

Claims (4)

Ultraviolet-blocking and moisture-absorbing quick-drying nylon fiber, characterized in that the polyamide polymer melt is mixed and added with nano silver and zinc oxide in the range of 5 to 100 nm in diameter, and spun through a spinneret having a royal cross section. Manufacturing method. The method of claim 1, wherein the nano silver and the zinc oxide are present in the yarn at 0.001 to 2.0% by weight, characterized in that the method for producing UV-resistant and quick-drying nylon fibers. A sunscreen and a sweat-absorbent quick-drying nylon fiber produced by the method according to claim 1 or 2, wherein the following formula (1) is satisfied. [Equation 1] W ₁ L ₁ : W ₂ L ₂ : W ₃ L ₃ = a: b: 1 Where W _i is the width of the first slit, L _i is the length of the i slit (where i = 1, 2, 3), * a is a real number satisfying 3.0 ≤ a ≤ 5.5, and b is a real number satisfying 1.5 ≤ b ≤ 3.5. The method of claim 3, wherein the fiber is a sunblock and sweat-absorbent quick-drying nylon fibers, characterized in that the single yarn fineness 0.5 to 5 denier.

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