阅读说明：本技术 红外线反射纤维及其制备方法 (Infrared reflective fiber and preparation method thereof ) 是由 张胜善 江若诚 刘昭晖 于 2020-05-15 设计创作，主要内容包括：一种红外线反射纤维及其制备方法。红外线反射纤维包括76.0重量份至88.5重量份的载体、1.8重量份至4.0重量份的红外线反射组成物、2.5重量份至7.5重量份的含二氧化钛组成物以及6.0重量份至16.0重量份的调色组成物。载体包括聚对苯二甲酸乙二酯。当红外线反射组成物以5.0wt％至7.5wt％的含量与余量的载体混合并制作成第一纤维时,第一纤维的最大红外线反射率介于61％至70％间。本揭露的红外线反射纤维可同时具有低明度及高红外线反射率,从而制得具有良好热隔绝效果的深色织物。(An infrared reflection fiber and a preparation method thereof. The infrared reflective fiber includes 76.0 to 88.5 parts by weight of a carrier, 1.8 to 4.0 parts by weight of an infrared reflective composition, 2.5 to 7.5 parts by weight of a titanium dioxide-containing composition, and 6.0 to 16.0 parts by weight of a toning composition. The support comprises polyethylene terephthalate. When the infrared ray reflective composition is mixed with the rest of the carrier in an amount of 5.0 wt% to 7.5 wt% and made into the first fiber, the maximum infrared ray reflectivity of the first fiber is between 61% to 70%. The infrared reflective fiber disclosed by the invention can simultaneously have low lightness and high infrared reflectivity, so that a dark color fabric with a good thermal insulation effect is prepared.)

1. An infrared-reflective fiber, comprising:

76.0 to 88.5 parts by weight of a carrier, wherein the carrier comprises polyethylene terephthalate;

1.8 to 4.0 parts by weight of an infrared reflective composition, wherein when the infrared reflective composition is mixed with the balance of the carrier in an amount of 5.0 to 7.5 wt% and made into a first fiber, the maximum infrared reflectance of the first fiber is between 61 to 70%;

2.5 to 7.5 parts by weight of a titanium dioxide-containing composition; and

6.0 to 16.0 parts by weight of a toning composition.

2. The infrared-reflective fiber according to claim 1, wherein the infrared-reflective composition comprises 74 to 78 parts by weight of the base powder, 18 to 22 parts by weight of the infrared-reflective coloring material, and 2 to 6 parts by weight of the additive.

3. The infrared-reflective fiber of claim 2, wherein the base powder comprises polybutylene terephthalate.

4. The infrared-reflective fiber of claim 2, wherein said infrared-reflective colorant comprises a titanium-nickel-antimony metal composite.

5. The infrared-reflective fiber of claim 4, wherein when said infrared-reflective colorant is mixed with the balance of said carrier at a level of from 1.0 wt% to 1.5 wt% to form a second fiber, said second fiber has a maximum infrared reflectance of from 64% to 70%.

6. The infrared-reflective fiber of claim 2, wherein the infrared-reflective composition comprises a chromium-iron metal composite.

7. The infrared-reflective fiber of claim 6, wherein when said infrared-reflective coloring material is mixed with the balance of said carrier at a level of 1.0 wt% to 1.5 wt% to form a third fiber, said third fiber has a maximum infrared reflectance of between 61% to 63%.

8. The infrared-reflective fiber of claim 2, wherein said additives include a paraffin-based dispersant and a thermal stabilizer.

9. The infrared-reflective fiber of claim 2, wherein the particle size of the infrared-reflective colorant is between 150 nm and 250 nm.

10. The infrared-reflective fiber of claim 1, wherein the titanium dioxide in said titanium dioxide-containing composition is in the rutile form.

11. The infrared-reflective fiber according to claim 1, wherein the toning composition comprises 74 to 78 parts by weight of the base powder, 18 to 22 parts by weight of the toning colorant, and 2 to 6 parts by weight of the additive.

12. The infrared-reflective fiber of claim 11, wherein said hueing material has a particle size in the range of 150 nm to 500 nm.

13. A method of making an infrared reflective fiber, comprising:

mixing 1.8 to 4.0 parts by weight of an infrared reflective composition, 2.5 to 7.5 parts by weight of a titanium dioxide-containing composition, 6.0 to 16.0 parts by weight of a color-adjusting composition and 76.0 to 88.5 parts by weight of a carrier, wherein when the infrared reflective composition is mixed with the balance of the carrier in an amount of 5.0 to 7.5 wt% and made into a first fiber, the maximum infrared reflectance of the first fiber is between 61 to 70%.

14. The method of making an infrared-reflective fiber of claim 13, wherein the method of making an infrared-reflective composition comprises:

carrying out liquid grinding on the infrared reflection pigment;

after the liquid grinding step, performing a drying step to form the refined infrared-reflecting pigment; and

uniformly mixing 74 to 78 parts by weight of a base material powder, 18 to 22 parts by weight of the refined infrared-reflective coloring material, and 2 to 6 parts by weight of an additive to obtain the infrared-reflective composition.

15. The method of claim 14, wherein the particle size of the refined infrared-reflective colorant is between 150 nm and 250 nm.

16. The method of making an infrared-reflective fiber of claim 14, wherein the liquid-milling step comprises:

mixing 65 to 80 parts by weight of water, 20 to 30 parts by weight of the infrared-reflective coloring material, and 1 to 2 parts by weight of a liquid dispersant; and

milling with a planetary ball mill at a speed of 100rpm to 300rpm for 4.5 hours to 5.5 hours.

17. The method of producing an infrared-reflective fiber according to claim 13, wherein the method of producing the titanium dioxide-containing composition comprises:

carrying out liquid grinding on the titanium dioxide;

after the liquid milling step, performing a drying step to form the refined titanium dioxide; and

uniformly mixing 74 to 78 parts by weight of a base material powder, 18 to 22 parts by weight of the refined titanium dioxide, and 2 to 6 parts by weight of an additive to obtain the titanium dioxide-containing composition.

18. The method of claim 17, wherein the particle size of the refined titanium dioxide is between 150 nm and 250 nm.

19. The method of making an infrared-reflective fiber of claim 17, wherein the liquid-milling step comprises:

mixing 65 to 80 parts by weight of water, 20 to 30 parts by weight of the titanium dioxide, and 1 to 2 parts by weight of a liquid dispersant; and

milling with a planetary ball mill at a speed of 100rpm to 300rpm for 4.5 hours to 5.5 hours.

20. The method of producing an infrared-reflective fiber according to claim 13, wherein the method of producing the toning composition comprises:

uniformly mixing 74 to 78 parts by weight of base material powder, 18 to 22 parts by weight of toning pigment and 2 to 6 parts by weight of additive to obtain the toning composition.

Technical Field

The present disclosure relates to a textile material and a method for preparing the same, and more particularly, to an infrared reflective fiber and a method for preparing the same.

Background

Under the global trend, the textile industry is facing strong competitive pressure, and textile manufacturers must continuously develop new technologies and diversified products to face the competition all over the world.

In recent years, the average temperature has been increasing due to the greenhouse effect and global warming. In the face of increasingly hot climates, various sun-shading fabrics focus more on light blocking and heat energy reflection so as to improve the heat insulation effect and achieve the protection effect. Furthermore, dark fabrics are a modern trend. Therefore, how to effectively improve the thermal insulation of the fabric, especially the thermal insulation of the fabric with dark color, becomes a very important issue at present.

Disclosure of Invention

One embodiment of the present disclosure is an infrared reflective fiber suitable for application to dark colored fabrics.

According to an embodiment of the present disclosure, the infrared reflective fiber includes 76.0 to 88.5 parts by weight of a carrier, 1.8 to 4.0 parts by weight of an infrared reflective composition, 2.5 to 7.5 parts by weight of a composition containing titanium dioxide, and 6.0 to 16.0 parts by weight of a toning composition. The carrier includes polyethylene terephthalate (PET). When the infrared ray reflective composition is mixed with the rest of the carrier in an amount of 5.0 wt% to 7.5 wt% and made into the first fiber, the maximum infrared ray reflectivity of the first fiber is between 61% to 70%.

In one embodiment of the present disclosure, the infrared-reflective composition includes 74 to 78 parts by weight of a base powder, 18 to 22 parts by weight of an infrared-reflective colorant, and 2 to 6 parts by weight of an additive.

In one embodiment of the present disclosure, the substrate powder includes polybutylene terephthalate (PBT).

In one embodiment of the present disclosure, the infrared-reflective pigment includes a titanium-nickel-antimony metal composite.

In one embodiment of the present disclosure, when the infrared reflective colorant is mixed with the carrier in an amount of 1.0 wt% to 1.5 wt% to form the second fiber, the infrared reflectivity of the second fiber is between 64% to 70%.

In one embodiment of the present disclosure, the infrared reflective composition includes a chromium-iron metal composite.

In one embodiment of the present disclosure, when the infrared reflective pigment is mixed with the carrier in an amount of 1.0 wt% to 1.5 wt% to form the third fiber, the infrared reflectivity of the third fiber is between 61% to 63%.

In one embodiment of the present disclosure, the additive includes a paraffin-based dispersant and a heat stabilizer.

In one embodiment of the present disclosure, the particle size of the infrared-reflective pigment is between 150 nm and 250 nm.

In one embodiment of the present disclosure, the titanium dioxide in the titanium dioxide-containing composition is rutile (rutile).

In one embodiment of the present disclosure, the toner composition includes 74 to 78 parts by weight of the base powder, 18 to 22 parts by weight of the toner, and 2 to 6 parts by weight of the additive.

In one embodiment of the present disclosure, the particle size of the toning material is between 150 nm and 500 nm.

Another embodiment of the present disclosure is a method of making an infrared reflective fiber.

According to one embodiment of the present disclosure, a method for preparing an infrared reflective fiber includes the following steps. Mixing 1.8 to 4.0 parts by weight of infrared reflective composition, 2.5 to 7.5 parts by weight of titanium dioxide-containing composition, 6.0 to 16.0 parts by weight of toning composition and 76.0 to 88.5 parts by weight of carrier, wherein when the infrared reflective composition is mixed with the rest of carrier in a content of 5.0 to 7.5 wt% and made into the first fiber, the maximum infrared reflectivity of the first fiber is between 61 to 70%.

According to one embodiment of the present disclosure, a method for preparing an infrared reflective composition includes the following steps. And carrying out liquid grinding on the infrared reflection pigment. After the liquid grinding step, a drying step is performed to form a refined infrared-reflecting colorant. Uniformly mixing 74 to 78 parts by weight of the base material powder, 18 to 22 parts by weight of the refined infrared-reflective coloring material, and 2 to 6 parts by weight of the additive to obtain an infrared-reflective composition.

According to one embodiment of the present disclosure, the particle size of the refined infrared-reflective pigment is between 150 nm and 250 nm.

According to one embodiment of the present disclosure, the liquid polishing step includes the following steps. Mixing 65 to 80 parts by weight of water, 20 to 30 parts by weight of an infrared-reflective coloring material, and 1 to 2 parts by weight of a liquid dispersant. Milling with a planetary ball mill at a speed of 100rpm to 300rpm for 4.5 hours to 5.5 hours.

According to one embodiment of the present disclosure, a method for preparing a composition containing titanium dioxide includes the following steps. The titanium dioxide is subjected to a liquid milling step. After the liquid milling step, a drying step is performed to form refined titanium dioxide. Uniformly mixing 74 to 78 parts by weight of the base material powder, 18 to 22 parts by weight of the refined titanium dioxide, and 2 to 6 parts by weight of the additive to obtain a titanium dioxide-containing composition.

According to an embodiment of the present disclosure, the particle size of the refined titanium dioxide is between 150 nm and 250 nm.

According to one embodiment of the present disclosure, the liquid polishing step includes the following steps. Mixing 65 to 80 parts by weight of water, 20 to 30 parts by weight of titanium dioxide, and 1 to 2 parts by weight of a liquid dispersant. Milling with a planetary ball mill at a speed of 100rpm to 300rpm for 4.5 hours to 5.5 hours.

According to one embodiment of the present disclosure, a method for preparing a color matching composition includes the following steps. Uniformly mixing 74 to 78 parts by weight of base material powder, 18 to 22 parts by weight of toning pigment and 2 to 6 parts by weight of additive to obtain the toning composition.

According to the above embodiments of the present disclosure, the infrared reflective fiber having both low brightness and high infrared reflectivity is prepared by mixing the carrier, the infrared reflective composition, the titanium dioxide-containing composition, and the color-adjusting composition in a suitable ratio. Therefore, the dark color fabric produced using the infrared reflective fiber has a good thermal insulation effect.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present disclosure. It should be understood, however, that these implementation details are not to be interpreted as limiting the disclosure. That is, in some embodiments of the disclosure, these implementation details are not necessary, and thus should not be used to limit the disclosure. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner. In addition, the dimensions of the various elements in the drawings are not necessarily to scale, for the convenience of the reader.

The present disclosure provides an infrared reflective fiber and a method for preparing the same. The carrier, the infrared reflecting composition, the titanium dioxide-containing composition and the color-mixing composition are uniformly mixed in a proper proportion to prepare the infrared reflecting fiber with low lightness and high infrared reflectivity, so that the dark color fabric with good heat insulation effect is prepared.

The preparation method of the infrared reflective fiber disclosed by the invention comprises the step of mixing 76.0 to 88.5 parts by weight of carrier, 1.8 to 4.0 parts by weight of infrared reflective composition, 2.5 to 7.5 parts by weight of titanium dioxide-containing composition and 6.0 to 16.0 parts by weight of toning composition to form the infrared reflective fiber with dark color and high infrared reflectivity. It should be understood that "infrared" as used herein refers to long wavelength radiation having a wavelength between 700 nm and 1600 nm, also known as "near infrared".

The components of the infrared-reflective fiber and the infrared-reflective fiber will be described in detail below.

< vector >

The carrier includes polyethylene terephthalate (PET). In some embodiments, the support may further comprise polybutylene terephthalate (PBT) or other polyesters. In other words, the carrier can be a single ingredient or a mixture of ingredients.

< Infrared-reflective composition >

The infrared reflective composition is configured to enhance the infrared reflectivity of the infrared reflective fibers of the present disclosure. Specifically, when the infrared reflective composition is mixed with the balance of the carrier in an amount of 5.0 wt% to 7.5 wt% and made into the first fiber, the maximum infrared reflectance of the first fiber and the fabric made therefrom is between 61% to 70%. In some embodiments, the infrared reflective composition may include 74 to 78 parts by weight of the base powder, 18 to 22 parts by weight of the infrared reflective colorant, and 2 to 6 parts by weight of the additive.

In some embodiments, the substrate powder may include polybutylene terephthalate. In some embodiments, the substrate powder may further include polyethylene terephthalate or other polyesters. In other words, the substrate powder may be a single component or a mixture of multiple components.

In some embodiments, the infrared-reflective colorant can be a yellow infrared-reflective colorant, and the yellow infrared-reflective colorant can include a titanium-nickel-antimony metal composite, thereby increasing the infrared reflectance of a fiber made therewith. Specifically, when the yellow infrared-reflective colorant is mixed with the balance of the carrier at a content of 1.0 wt% to 1.5 wt% to form the second fiber, the maximum infrared reflectance of the second fiber and the fabric manufactured therefrom may be between 64% to 70%. In some embodiments, the second fibers and fabrics made therefrom may have a L value in L x a b color space of between 88.2 and 88.9, a value of between-7.5 and-0.7, and b value of between 28.4 and 33.3, indicating a yellow color. In some embodiments, the second fiber can have a fiber size of 50d/24f to 300d/144f and a fiber strength greater than 3.0g/d to meet industry standards.

In some embodiments, the infrared-reflective colorant can be a black infrared-reflective colorant, and the black infrared-reflective colorant can include a chromium-iron metal composite, thereby increasing the infrared reflectance of the fiber made therewith. Specifically, when the black infrared-reflective coloring material is mixed with the balance of the carrier at a content of 1.0 wt% to 1.5 wt% to form the third fiber, the maximum infrared reflectance of the third fiber and the fabric manufactured therefrom may be between 61% to 63%. In some embodiments, the third fibers and fabrics made therefrom may have a L value in L x a x b color space of between 44.0 and 50.0, a value in a x may be between 3.5 and 3.8, and b value in a b may be between 5.4 and 5.7, indicating that they are black in color. In some embodiments, the third fiber can have a fiber size of 50d/24f to 300d/144f and a fiber strength greater than 3.0g/d to meet industry standards.

In some embodiments, the additive may include a paraffin-based dispersant and a heat stabilizer. The paraffin dispersant can uniformly disperse the base material powder and the infrared-reflecting colorant, and the heat stabilizer can prevent the infrared-reflecting colorant from cracking at high temperature. In some embodiments, the paraffin-based dispersant is, for example, D1841E (trade name, available from far east, inc., switzerland). In some embodiments, the thermal stabilizer is, for example, Eversorb90 (trade name, available from Yongshoku industries, Inc.) or Eversorb12 (trade name, available from Yongshoku industries, Inc.).

In the following description, a method for preparing the infrared reflective composition will be described.

First, a liquid grinding step is performed on the infrared reflection coloring material. In some embodiments, the liquid milling step includes mixing 65 to 80 parts by weight of water, 20 to 30 parts by weight of the infrared-reflective coloring material, and 1 to 2 parts by weight of the liquid dispersant, and milling with a planetary ball mill at a rotation speed of 100 to 300rpm for 4.5 to 5.5 hours, and in some embodiments, the liquid dispersant may include a non-ionic dispersant. In some embodiments, the planetary ball mill is, for example, a planetary zirconium bead mill.

Then, after the liquid grinding step, a drying step is performed to form a refined infrared-reflecting colorant. In some embodiments, the particle size of the refined infrared-reflective colorants can be between 150 nanometers and 250 nanometers. In some embodiments, the drying temperature may be between 100 ℃ and 110 ℃, and the drying time may be between 7.5 hours and 8.5 hours.

Subsequently, 74 to 78 parts by weight of the base material powder, 18 to 22 parts by weight of the refined infrared-reflective coloring material, and 2 to 6 parts by weight of the additive are uniformly mixed to obtain an infrared-reflective composition. In some embodiments, the infrared reflective composition may be further kneaded to form a master batch (plastic pellet) for improving storage convenience. In some embodiments, the temperature of the kneading process may be between 230 ℃ and 280 ℃. In some embodiments, the screw speed may be between 200rpm and 300 rpm.

< composition containing titanium dioxide >

The titanium dioxide-containing composition is configured to enhance the infrared reflectance of the infrared-reflective fibers of the present disclosure. In some embodiments, the titanium dioxide in the titanium dioxide-containing group can be rutile (rutile) to enhance the infrared reflectance of the fibers made therefrom. Specifically, when titanium dioxide is mixed with the balance of the carrier at a content of 1.0 wt% to form the fourth fiber, the maximum infrared reflectance of the fourth fiber and the fabric manufactured therefrom may be 72%. In some embodiments, the fourth fiber and fabrics made therefrom may have a L value of 95.3, a value of-0.4, and b value of 2.4 in L a b color space, showing that its color is white. In some embodiments, the fourth fiber can have a fiber size of 50d/24f to 300d/144f and a fiber strength greater than 3.0g/d to meet industry standards.

In the following description, a method for producing a titanium dioxide-containing composition will be described.

First, the titanium dioxide is subjected to a liquid milling step. In some embodiments, the liquid milling step includes mixing 65 to 80 parts by weight of water, 20 to 30 parts by weight of titanium dioxide, and 1 to 2 parts by weight of a liquid dispersant, and milling with a planetary ball mill at a rotation speed of 100 to 300rpm for 4.5 to 5.5 hours, and in some embodiments, the liquid dispersant may include a non-ionic dispersant. In some embodiments, the planetary ball mill is, for example, a planetary zirconium bead mill.

Next, after the liquid milling step, a drying step is performed to form a refined titanium dioxide, which may have a particle size of 150 nm to 250 nm in some embodiments. In some embodiments, the drying temperature may be between 100 ℃ and 110 ℃, and the drying time may be between 7.5 hours and 8.5 hours.

Subsequently, 74 to 78 parts by weight of the base material powder, 18 to 22 parts by weight of the refined titanium dioxide, and 2 to 6 parts by weight of the additive are uniformly mixed to obtain a titanium dioxide-containing composition. In some embodiments, the titanium dioxide-containing composition may be further kneaded to form a master batch (plastic pellet) for improving the storage convenience. In some embodiments, the temperature of the kneading process may be between 230 ℃ and 280 ℃. In some embodiments, the screw speed may be between 200rpm and 300 rpm.

< color-adjusting composition >

The toning composition is configured to provide the infrared reflective fibers of the present disclosure with a lower lightness, thereby exhibiting a darker color. In some embodiments, the tinting composition may include 74 to 78 parts by weight of the base powder, 18 to 22 parts by weight of the tinting colorant, and 2 to 6 parts by weight of the additive.

In some embodiments, the substrate powder may include polybutylene terephthalate. In some embodiments, the substrate powder may further include polyethylene terephthalate or other polyesters. In other words, the substrate powder may be a single component or a mixture of multiple components.

In some embodiments, the tinting colorants may include a yellow tinting colorant, a red tinting colorant, a blue tinting colorant, a green tinting colorant, and a violet tinting colorant. In some embodiments, the particle size of the hueing material may be between 150 nm and 500 nm. When the toning pigments are mixed with the rest of the carrier respectively at the content of 1.0 wt% to form corresponding fibers, the L a b value, the maximum infrared reflectivity, the fiber specification and the fiber strength of each fiber in the L a b color space are shown in table one.

Watch 1

As can be seen from the values of L a b in table one, when the yellow toning coloring material, the red toning coloring material, the blue toning coloring material, the green toning coloring material, and the violet toning coloring material are mixed with the remaining carrier in an amount of 1.0 wt% to form corresponding fibers, the colors displayed on the respective fibers are yellow, red, blue, green, and violet, respectively. In addition, each fiber can have good maximum infrared reflectance as well as fiber specification and fiber strength that meet industry standards.

In some embodiments, the additive may include a paraffin-based dispersant and a heat stabilizer. The paraffin dispersant can uniformly disperse the base material powder and the infrared-reflecting colorant, and the heat stabilizer can prevent the infrared-reflecting colorant from cracking at high temperature. In some embodiments, the paraffin-based dispersant is, for example, D1841E (trade name, available from far east, inc., switzerland). In some embodiments, the thermal stabilizer is, for example, Eversorb90 (trade name, available from Yongshoku industries, Inc.) or Eversorb12 (trade name, available from Yongshoku industries, Inc.).

In the following description, a method of preparing a toner composition will be described.

Uniformly mixing 74 to 78 parts by weight of base material powder, 18 to 22 parts by weight of toning pigment and 2 to 6 parts by weight of additive to obtain the toning composition. In some embodiments, the color-adjusting composition may be further kneaded to form a master batch (plastic pellet) for improving the storage convenience. In some embodiments, the temperature of the kneading process may be between 230 ℃ and 280 ℃. In some embodiments, the screw speed may be between 200rpm and 300 rpm. In some embodiments, the hueing material may have a particle size between 150 nm and 500 nm.

< Infrared reflective fiber >

The disclosure then mixes 76.0 to 88.5 parts by weight of a carrier, 1.8 to 4.0 parts by weight of an infrared reflective composition, 2.5 to 7.5 parts by weight of a titanium dioxide-containing composition, and 6.0 to 16.0 parts by weight of a toning composition, and performs a melt spinning step to obtain an infrared reflective fiber having a dark color and a high infrared reflectance. In some embodiments, the spinning temperature of the melt spinning step may be between 280 ℃ and 290 ℃. In some embodiments, the spinning speed of the melt spinning step can be greater than or equal to 2500 m/min.

In some embodiments, the infrared-reflective fibers can be, for example, monocomponent fibers. In other embodiments, the infrared-reflective fiber may be, for example, a core-sheath fiber. In some embodiments, the infrared reflective fiber can have a fiber size of 50d/24f to 300d/144f, and a fiber strength greater than 3.0g/d to meet industry standards.

In the following description, a plurality of comparative examples and examples will be listed to verify the efficacy of the present disclosure. The ingredients and contents of the comparative examples and examples are shown in table two, wherein comparative examples 1 to 12 and examples 1 to 8 are single component fibers, and example 9 is a core-sheath fiber with a core-sheath weight ratio of 50/50. It is understood that the carrier, the infrared reflective composition, the titanium dioxide-containing composition and/or the toning composition in each of the comparative examples and examples are prepared by the aforementioned components and methods. For example, when the infrared reflective composition is labeled "yellow", it is represented by being prepared using the yellow infrared reflective colorant, and when the tinting composition is labeled "yellow + red + violet", it is represented by being prepared using the yellow, red, and violet tinting colorants.

Watch two

Note: the content in parentheses is in parts by weight

< experimental example 1: fiber values of Rapa b, maximum infrared reflectance and fabric surface temperature Change test >

In this experimental example, the fibers of the above examples and comparative examples were respectively formed into fabrics to be tested for the la, the b, the maximum ir reflectance and the surface temperature change. In the surface temperature variation test, the test conditions were irradiation of the fabric for 10 minutes at a vertical distance of 100 cm with a halogen lamp having a power of 500 w and a wavelength of 750 nm. The test results are shown in table three.

Watch III

First, as can be seen from the values of la a b in the color space of examples 1 to 3, when 3.0 to 4.0 parts by weight of the infrared reflective composition, 5.0 parts by weight of the titanium dioxide-containing composition, 15.0 to 16.0 parts by weight of the toning composition, and 76.0 parts by weight of the carrier are mixed and made into the infrared reflective fiber, the color of the infrared reflective fiber is dark black-purple, and the L value thereof is between 19.4 and 22.7, showing a lower lightness (i.e., a darker color). In addition, the maximum infrared reflectance of examples 1 to 3 was between 72% and 74%, showing good infrared reflectance. In addition, the fabrics respectively prepared in examples 1 to 3 showed a small change in surface temperature, and showed a good heat insulating effect.

Next, as can be seen from the values of la a b in the color space of examples 4 to 7, when 3.0 parts by weight of the infrared reflective composition, 2.5 parts by weight to 7.5 parts by weight of the titanium dioxide-containing composition, 6.0 parts by weight to 8.5 parts by weight of the toning composition, and 81.0 parts by weight to 88.5 parts by weight of the carrier were mixed and made into the infrared reflective fiber, the color of the infrared reflective fiber was dark green, and the value of L was between 22.7 and 26.6, and exhibited a lower lightness (i.e., darker color). In addition, the maximum infrared reflectance of examples 4 to 7 was between 67% and 75%, showing good infrared reflectance. In addition, the fabrics respectively prepared in examples 4 to 7 showed a small change in surface temperature, and showed a good heat insulating effect.

Further, as can be seen from the values of L a b in the color space of example 8, when 3.0 parts by weight of the infrared-reflective composition, 4.0 parts by weight of the titanium dioxide-containing composition, 11.0 parts by weight of the toning composition, and 82.0 parts by weight of the carrier were mixed and made into the infrared-reflective fiber, the infrared-reflective fiber was dark black, and had a value of L of 22.0, showing a lower lightness (i.e., darker color). In addition, example 8 showed a good infrared reflectance with a maximum infrared reflectance of 73%. In addition, the fabric obtained in example 8 showed a small change in surface temperature, and showed a good thermal insulation effect.

Finally, example 9 is a core-sheath fiber in which the infrared-reflective composition is disposed in the core layer, the titanium dioxide-containing composition is disposed in the sheath layer, and the color-adjusting composition is disposed in both the core layer and the sheath layer. As can be seen from the values of la and b in the color space of L a and b of example 9, when 1.80 parts by weight of the infrared-reflective composition, 11.25 parts by weight of the toning composition, and 84.45 parts by weight of the carrier were mixed and made into the infrared-reflective fiber, the color of the infrared-reflective fiber was dark black, and the value of L was 18.6, showing a lower lightness (i.e., a darker color). Further, example 9 showed a good infrared reflectance with a maximum infrared reflectance of 76%. In addition, the fabric obtained in example 9 showed a small change in surface temperature, and showed a good thermal insulation effect.

On the other hand, from comparative examples 1 to 2, in L a b color space of L a B value, only with conventional polyester fiber has a large brightness, can not show dark color; as can be seen from the values of la a b in the color space of comparative examples 3 to 12, the fibers obtained by adding only one of the infrared-reflective composition, the titanium dioxide-containing composition and the toning composition also had a large lightness and could not show a dark color.

< experimental example 2: wash, sweat and daylight fastness testing of fabrics >

The fibers of examples 2, 6, 8 and 9 were each formed into fabrics and the fabrics were tested for wash fastness, perspiration fastness and light fastness using the AATCC 61-20102A test method, perspiration fastness using the AATCC 15 test method and light fastness using the AATCC 16.2 test method. The test results show that the fastness to washing and perspiration of the fabrics made from the above examples to wool, acryl, teflon, nylon, cotton and acetic acid can reach the standard of grade 4 to grade 5, and the fastness to sunlight of the fabrics made from the above examples can reach the standard of grade 4 or above. Therefore, the fabrics prepared by the embodiments hardly have color transfer to wool, acryl, Teflon, nylon, cotton and acetic acid, and can almost maintain the original color after the sunlight fastness test, thereby meeting the requirements of users.

According to the above embodiments of the present disclosure, the infrared reflective fiber having both low brightness and high infrared reflectivity can be obtained by preparing the infrared reflective composition, the titanium dioxide-containing composition and the color-adjusting composition respectively and uniformly mixing them with the carrier in a proper ratio, so that a dark color fabric having good thermal insulation effect can be obtained using the infrared reflective fiber.

Although the present disclosure has been described with reference to particular embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure, and therefore the scope of the present disclosure should be limited only by the terms of the appended claims.