Light / temperature-sensitive color-changing cool fabric and preparation method thereof

Abstract

The invention relates to the technical field of textile fabrics, in particular to a light / temperature-sensitive color-changing cool-feeling fabric and a preparation method thereof.The fabric with the cool-feeling effect is adopted as base cloth, and light-sensitive color-changing microcapsules, temperature-sensitive color-changing microcapsules, an adhesive, a thickening agent and a solvent are mixed according to a certain proportion to obtain light / temperature-sensitive color-changing ink; the color-changing ink is coated on cool base cloth through a silk-screen printing process, the cool base cloth is pre-dried and then baked at high temperature to obtain the light / temperature-sensitive color-changing cool fabric, and the fabric is light, thin and soft, not only has the effect of instant contact cool feeling, but also can change color under ultraviolet irradiation or when a certain temperature is reached, is good in cycle performance, and can be used as a light / temperature-sensitive color-changing cool fabric. Meanwhile, the response speed of color change of the fabric is increased due to the cool feeling effect, the skin temperature of the human body can be reflected more rapidly, heatstroke is prevented, early warning is achieved in advance, and damage of heatstroke to the body is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, and in particular to a light / temperature sensitive color changing cool fabric and a preparation method thereof. Background Art

[0002] In recent years, global warming, greenhouse effect and greenhouse gas problems have intensified, summers have become hotter, and people's demand for summer fabrics has increased. Therefore, fabrics with excellent cooling properties have become popular. Fabrics with cooling effects are generally achieved by designing the fabric structure or modifying the fiber raw materials and finishing them. Among them, the cooling effect of the fiber itself is the key to keeping the fabric cool during wearing or wearing, and it can save energy and protect the environment.

[0003] People's requirements for fabrics have changed from covering the body and keeping warm to being fashionable and beautiful, and then to being functional, information-based and intelligent. Fabrics with a single function can no longer meet the needs of consumers, and composite intelligent textile fabrics that combine functionality and intelligence have become a hot spot in the development of clothing fabrics. Summary of the invention

[0004] The present invention aims to at least solve the problem that the textile fabrics in the prior art have relatively single functionality and lack the ability to simultaneously achieve a cool feeling, temperature-sensitive color change and light-sensitive color change.

[0005] This solution provides a method for preparing a light / temperature sensitive color-changing cool fabric, comprising the following steps:

[0006] Step 1: Prepare light / temperature sensitive color changing ink:

[0007] The photosensitive color-changing microcapsules, the thermosensitive color-changing microcapsules, the adhesive, the thickener and the solvent are mixed in a certain proportion, stirred by a magnetic stirrer and then ultrasonically mixed to obtain a photo / temperature-sensitive color-changing ink;

[0008] Step 2: Forming of light / temperature sensitive color changing cool fabric:

[0009] A cool base fabric is prepared, and color-changing ink is coated on the cool base fabric through a screen printing process, and the cool base fabric is pre-baked and then baked at a high temperature to obtain a light / temperature sensitive color-changing cool fabric.

[0010] Preferred technical solution 1: The light / temperature sensitive color-changing ink comprises the following ingredients in parts by weight: 10 parts of photosensitive color-changing microcapsules and temperature sensitive color-changing microcapsules, 15 to 25 parts of adhesive, 5 parts of thickener, and 60 to 70 parts of solvent.

[0011] Preferred technical solution 2: The weight ratio of the photosensitive color-changing microcapsules to the thermosensitive color-changing microcapsules is 1 to 2:3.

[0012] Preferred technical solution three: The preparation process of the cool base fabric is: woven from ordinary polyester warp yarn and cool nylon filament weft yarn using a rapier loom;

[0013] The cool nylon filament weft yarn has a special-shaped cross section and is prepared by melt spinning by adding ground jade particles into a spinning solution through a mixing technology, and has good thermal conductivity.

[0014] Preferred technical solution 4: the photosensitive color-changing microcapsules are colorless and change to one or more of blue, red, yellow and green;

[0015] The temperature-sensitive color-changing microcapsules change from colored to colorless, and the color-changing temperature is one or more of 31° C., 33° C., 35° C., and 38° C.

[0016] Preferred technical solution five: The color-changing properties of the photosensitive color-changing microcapsules and the thermosensitive color-changing microcapsules are both reversible.

[0017] Preferred technical solution six: the adhesive is one or more of polyacrylate, butadiene, water-based polyurethane, vinyl acetate, and polyurethane.

[0018] Preferred technical solution seven: the stirring time of the magnetic stirrer is 15 to 25 minutes, and the ultrasonic time is 20 to 30 minutes.

[0019] Preferred technical solution eight: The mesh size of the screen plate in the screen printing process is 100 to 250 meshes.

[0020] Preferred technical solution nine: The process of pre-baking and then high-temperature baking is as follows: the pre-baking temperature is 70-90°C, the pre-baking time is 5-15 minutes, the high-temperature baking temperature is 120-160°C, and the high-temperature baking time is 3-5 minutes.

[0021] The scheme also discloses a light / temperature sensitive color-changing cooling fabric prepared according to the preparation method of the light / temperature sensitive color-changing cooling fabric.

[0022] The above structure enables this solution to have the following beneficial effects:

[0023] (1) The present invention uses a fabric with a cooling effect as the base fabric. The woven fabric is thin and light, and has a soft touch. In an environment below body temperature, it has a continuous cooling effect, so that people feel cool and dry when wearing it;

[0024] (2) The color-changing cool fabric prepared by the screen printing process of the present invention can change color at different temperatures, and the ambient temperature and human skin temperature can be known at any time, so as to give early warning of high temperature weather. The color can also be changed under ultraviolet conditions, which improves the aesthetics and interest of the fabric;

[0025] (3) The color-changing cool feeling fabric of the present invention has good softness and good soap washing resistance;

[0026] (4) The color-changing and cooling fabric of the present invention has a fast color-changing / fading response speed and excellent cyclic color-changing / fading performance. At the same time, the instantaneous cooling effect shortens the color-changing response time.

[0027] (5) The color-changing cool fabric of the present invention has the function of stable and rapid color change, and can be designed to form summer clothing with various patterns;

[0028] The present invention uses two reversible color-changing microcapsules and an adhesive to mix, and forms a pattern on the fabric through a screen printing process. The process is simple, the operation is convenient, the cost is low, and large-scale production can be carried out. When the temperature changes or ultraviolet rays are irradiated, the pattern will show different colors, which increases the sense of fashion and reduces consumers' aesthetic fatigue of the fabric. At the same time, the base fabric is made of ordinary polyester warp yarn and cool nylon filament weft yarn interwoven with each other. Jade particles with high thermal conductivity are added to the cool nylon filament, so that the thermal conductivity and heat dissipation of the fabric are fast, the contact cool effect is good, the fabric is light and soft, and gives people a cool and comfortable experience when worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is the surface morphology of the nylon filaments in fabric examples 1-3 of the present invention;

[0031] Figure 2 The color change effect diagram of fabric examples 1-3 of the present invention;

[0032] Figure 3 The temperature-sensitive color change / fading response speed test diagram of Examples 1-3 and Comparative Example 1;

[0033] Figure 4 This is a test chart of the photosensitivity color change / fading response speed of Examples 1-3 and Comparative Example 1. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] This example discloses a method for preparing a light / temperature sensitive color changing cool feeling fabric, and the specific steps are as follows:

[0037] (1) Using 160dtex compact siro-spun polyester yarn as warp yarn and 78dtex / 48f cool nylon filament as weft yarn, a fabric with a cool effect was woven through a rapier loom;

[0038] (2) 0.5 g of photochromic microcapsules, 1.5 g of thermochromic microcapsules, 3 g of a binder, 1 g of a thickener, and 14 g of a solvent were mixed by weight, stirred for 15 min by a magnetic stirrer, and then ultrasonicated for 20 min to uniformly mix the mixture, thereby obtaining a photo / thermochromic ink;

[0039] (3) Using screen printing technology: After the color-changing ink is coated on the cool base fabric through a scraper, it is pre-baked at 70°C for 5 minutes and baked at 160°C for 5 minutes to finally obtain a light / temperature sensitive color-changing cool fabric.

[0040] Embodiment 2:

[0041] (1) Using 160dtex compact siro-spun polyester yarn as warp yarn and 78dtex / 48f cool nylon filament as weft yarn, a fabric with a cool effect was woven through a rapier loom;

[0042] (2) Mix 0.5 g of photochromic microcapsules, 1.5 g of thermochromic microcapsules, 4 g of a binder, 1 g of a thickener, and 13 g of a solvent, by weight, stir for 20 min using a magnetic stirrer, and then perform ultrasonication for 25 min to uniformly mix the mixture, thereby obtaining a photo / thermochromic ink;

[0043] (3) Using screen printing technology: After the color-changing ink is coated on the cool base fabric by a scraper, it is pre-baked at 80°C for 10 minutes and baked at 120°C for 5 minutes to finally obtain a light / temperature sensitive color-changing cool fabric.

[0044] Embodiment 3:

[0045] (1) Using 160dtex compact siro-spun polyester yarn as warp yarn and 78dtex / 48f cool nylon filament as weft yarn, a fabric with a cool effect was woven through a rapier loom;

[0046] (2) According to weight, 0.5 g of photochromic microcapsules, 1.5 g of thermochromic microcapsules, 5 g of binder, 1 g of thickener and 12 g of cellulose were mixed, stirred with a magnetic stirrer for 25 min and then ultrasonicated for 30 min to uniformly mix, thereby obtaining a photo / thermochromic ink;

[0047] (3) Using screen printing technology: After the color-changing ink is coated on the cool base fabric through a scraper, it is pre-baked at 90°C for 15 minutes and baked at 140°C for 5 minutes to finally obtain a light / temperature sensitive color-changing cool fabric.

[0048] Comparative Example 1: The method for preparing the light / temperature sensitive color-changing ink in Comparative Example 1 is the same as that in Example 3, except that nylon is ordinary yarn and the woven fabric does not have a cooling effect. The specific steps are as follows:

[0049] (1) Using 160dtex compact siro-spun polyester yarn as warp yarn and 78dtex / 48f ordinary nylon yarn as weft yarn to weave ordinary fabrics through a rapier loom;

[0050] (2) 0.5 g of photochromic microcapsules, 1.5 g of thermochromic microcapsules, 5 g of a binder, 1 g of a thickener, and 12 g of a solvent were mixed by weight, stirred for 25 min using a magnetic stirrer, and then ultrasonicated for 30 min to uniformly mix the mixture, thereby obtaining a photo / thermochromic ink;

[0051] (3) Using screen printing technology: After the color-changing ink is coated on the cool base fabric through a scraper, it is pre-baked at 90°C for 15 minutes and baked at 140°C for 5 minutes to finally obtain a light / temperature sensitive color-changing cool fabric.

[0052] Performance testing:

[0053] The color change response speed test was carried out on Examples 1-3 and Comparative Example 1, and the test results are as follows: Figure 3 and Figure 4 As shown. Figure 3 and Figure 4 It can be seen that under temperature conditions, the color-changing fabric has a complete color-changing response speed of within 6 seconds, and the recovery time is within 12 seconds; under ultraviolet irradiation conditions, the color-changing fabric has a complete color-changing response speed of within 2 seconds, and the recovery time is within 12 seconds. This shows that both the thermochromic microcapsules and the photochromic microcapsules have excellent sensitivity. Compared with Comparative Example 1, Example 3 shows that the cool fabric has a faster response speed. The cool fabric can quickly transfer the heat from the skin to the fabric surface, providing color-changing conditions for the thermochromic microcapsules, thereby shortening the response speed.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a light / temperature sensitive color changing cool fabric, characterized in that: The steps include: Step 1: Prepare light / temperature sensitive color changing ink: The photosensitive color-changing microcapsules, the thermosensitive color-changing microcapsules, the adhesive, the thickener and the solvent are mixed in proportion, and the mixture is uniformly mixed by stirring with a magnetic stirrer and then ultrasonically mixed to obtain a photo / temperature-sensitive color-changing ink; Step 2: Forming of light / temperature sensitive color changing cool fabric: A fabric with a cool effect is used as a base fabric. The cool base fabric is woven from ordinary polyester warp yarn and cool nylon filament weft yarn using a rapier loom. Color-changing ink is coated on the cool base fabric through a screen printing process, and the cool base fabric is pre-baked and then baked at a high temperature to obtain a light / temperature sensitive color-changing cool fabric.

2. The color-changing cool fabric according to claim 1, characterized in that: In step (2), the cool nylon filament weft yarn has a special-shaped cross-section and is prepared by melt spinning by adding ground jade particles into a spinning solution through a mixing technology.

3. The color-changing cool fabric according to claim 1, characterized in that: In step (2), the polyester warp yarn is a compact siro-spun polyester yarn of 160 dtex, and the cool nylon filament weft yarn is a cool nylon filament of 78 dtex / 48f.

4. The color-changing cool fabric according to claim 1, characterized in that: In step (1), the light / temperature sensitive color-changing ink comprises the following components in parts by weight: 10 parts of photosensitive color-changing microcapsules and thermosensitive color-changing microcapsules - 10 parts of photosensitive color-changing microcapsules and thermosensitive color-changing microcapsules in total, 15-25 parts of binder, 5 parts of thickener, and 60-70 parts of solvent; The weight ratio of the photosensitive color-changing microcapsules to the thermosensitive color-changing microcapsules is 1 to 2:

3.

5. The color-changing cool fabric according to claim 1, characterized in that: In step (1), the photosensitive color-changing microcapsules are colorless and can change to one or more of blue, red, yellow, and green; The temperature-sensitive color-changing microcapsules change from colored to colorless, and the color-changing temperature is one or more of 31° C., 33° C., 35° C., and 38° C. The color changing properties of the photosensitive color changing microcapsules and the thermosensitive color changing microcapsules are both reversible.

6. The color-changing cool fabric according to claim 1, characterized in that: In step (1), the adhesive is one or more of polyacrylate, butadiene, water-based polyurethane, vinyl acetate, and polyurethane.

7. The color-changing cool fabric according to claim 1, characterized in that: In step (1), the stirring time of the magnetic stirrer is 15 to 25 minutes, and the ultrasonic time is 20 to 30 minutes.

8. The color-changing cool fabric according to claim 1, characterized in that: In step (2), the screen mesh of the screen printing process is 100 to 250 meshes.

9. The color-changing cool fabric according to claim 1, characterized in that: In step (2), the process of pre-baking and then high-temperature baking is as follows: first set the temperature of the oven to 70-90°C, put the color-changing cool fabric into it for pre-baking for 5-15 minutes, and then bake it at a high temperature of 120-160°C for 3-5 minutes.

10. A light / temperature sensitive color changing cool fabric prepared by the preparation method according to any one of claims 1 to 9.

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