TWI829359B - Alternating color fabric - Google Patents

Abstract

An alternating color fabric includes a base portion woven by first yarns, a pleat portion woven by second yarns, and a hydrophilic resin disposed on the pleat portion, in which the pleat portion at least partially covers the base portion. The contact angle of the hydrophilic resin is not greater than 60 degrees. The base portion has a first color, the pleat portion has a second color, and the first color is different from the second color.

Description

Visual color changes the fabric

This reveal is about a visual color changing weave.

With the development of science and technology, the application of textiles in daily life has begun to expand from the field of clothing to other fields. The application of textiles is more flexible, and various functional fabrics are constantly emerging, such as functional fabrics with specific purposes such as moisture absorption, perspiration, comfort, washability, appearance change, etc.

For example, U.S. Patent Application No. US16/275,593 discloses a breathable garment. The garment defines a torso portion and is connected to a wing design, where the wing is made of polyamide polymer and a pair of polyamide polymers. It is woven from bicomponent yarn made of phthalate polymer. When the flap absorbs moisture, the bicomponent yarn deforms and becomes wavy. In addition, the front and back sides of the flap are designed differently. When the human torso perspires, the moisture-absorbing wings turn up to create a visual change in the color of the clothing. However, the US16/275,593 application is still limited by the degree of flap curling, and has shortcomings such as an insignificant visual change effect and a limited color viewing angle. It cannot achieve the effect of visual changes in color development over a wide field of view, and it does not teach How to pass washability and chlorine resistance test specifications.

The application case TW202002829A discloses a flap-attached fabric, which includes a bottom tissue part and a flap part. The flap part preferably contains a polyester component and a polyamide component joined in a parallel or eccentric core-sheath type. Fibers are characterized by the fact that the aforementioned flaps are movable by being wetted, but the design of the flaps cannot provide visual change, and the design of the flaps does not allow for visible changes in color over a wide field of view, nor does it teach how to pass through the fiber. Specifications for testing resistance to washing and chlorine.

The application case TW201615910A discloses a color-changing fabric that uses knitting yarn loops to connect the surface yarn and the inner yarn loop to each other. It needs to be pulled by external force and the surface of the fabric can be viewed from the front of the fabric. The surface area of the fabric partially reveals the color of the inner yarn, so it has shortcomings such as insignificant visual change effect and limited color viewing angle.

Some fabrics use lightweight and soft non-woven materials to create wavy foldable structures. However, the non-woven material itself is not strong enough, elastic enough, cannot withstand washing, and its application is also limited.

An embodiment of the present disclosure provides a visual color changing fabric, including a base portion woven from a first yarn, a folding portion woven from a second yarn, and a hydrophilic layer disposed on the folding portion. resin layer. The base part and the folding view part can be hingedly connected through the connecting part, wherein the folding view part at least partially covers the base part. The water contact angle of the hydrophilic resin layer is not greater than 60 degrees, wherein the base portion has a first color, the folding portion has a second color, and the first color is different from the second color.

Another embodiment of the present disclosure provides a visual color changing fabric, including a base portion woven from a first yarn, a folding portion woven from a second yarn, and a folding portion disposed on the folding portion. Hydrophilic resin layer. The folding part and the base part are hot-pressed from the same fabric, and the folding part and the base part are retractable and can be connected without a connecting part. The water contact angle of the hydrophilic resin layer is not greater than 60 degrees, wherein the first yarn has a first color, and the second yarn has a second color, and the first color is different from the second color.

In some embodiments, the folding portion includes an outer page and an inner page connected, the inner page faces the base, and the hydrophilic resin layer is coated on the outer page.

In some embodiments, the folding portion includes an outer page and an inner page that are connected, the inner page faces the base, and the hydrophilic resin layer is coated on the inner page.

In some embodiments, the folding portion includes an outer page and an inner page that are connected, the inner page faces the base, and the hydrophilic resin layer is coated on the inner page and the outer page.

In some embodiments, the folding portion completely covers the base portion.

In some embodiments, the base portion is partially exposed from the folding portion.

In some embodiments, the horizontal color rendering of the visual color-changing fabric can be viewed at a viewing angle of up to 170 degrees.

In some embodiments, the vertical color display viewing angle of the visual color-changing fabric can reach 120 degrees.

The coverage rate of the hydrophilic resin layer in the folding part is 10% to 99%.

In some embodiments, the pattern of the hydrophilic resin layer is a continuous pattern.

In some embodiments, the pattern of the hydrophilic resin layer is a solid or hollow discontinuous pattern, and the discontinuous pattern is dot-shaped, line-shaped, strip-shaped, circular, elliptical, square, polygonal, irregular graphics, or its combination.

In some embodiments, the hydrophilic resin layer has a third color, and the first color and the third color are different.

In some embodiments, the hydrophilic resin layer has a third color, and the second color is different from the third color.

In some embodiments, the resin of the hydrophilic resin layer includes polyurethane resin, wherein the hard segment content of the polyurethane resin accounts for 11 to 40 weight percent of the total composition.

In some embodiments, the resin of the hydrophilic resin layer includes a polyurethane resin with isocyanate functional groups, wherein the content of isocyanate functional groups before curing reaction is no more than 6 weight percent, including 0 to 6 weight percent.

In some embodiments, after the visual color-changing fabric is washed and tested 20 times, the color area can reach 2% to 40%.

In some embodiments, after the visual color-changing fabric passes the AATCC 162-2002 chlorine swimming water fastness test, the color development area can reach 2% to 40%.

Yet another embodiment of the present disclosure provides a visual color-changing fabric, including a base portion and a hydrophilic resin layer disposed on one or both sides of the base portion. The water contact angle of the hydrophilic resin layer is less than 60 degrees. The base part is woven from at least one kind of yarn. When the yarn of the base part is woven from a single kind of yarn, a printing coating is further provided on the hydrophilic resin layer or the surface of the base part. When the base part is woven with When there are more than two kinds of yarns in the part, the yarns have more than two colors. The yarn color of the base part, the hydrophilic resin layer and the color of the printing coating may be different, and the coverage rate of the hydrophilic resin layer on the base part is 1% to 99%.

In some embodiments, the hydrophilic resin layer is a continuous pattern.

In some embodiments, the hydrophilic resin layer is a solid or hollow discontinuous pattern, and the discontinuous pattern is dot-shaped, line-shaped, strip-shaped, circular, elliptical, square, polygonal, irregular graphics, or a combination thereof .

In some embodiments, the printing coating disposed on the surface of the hydrophilic resin layer partially covers the upper side or lower side of the hydrophilic resin layer.

In some embodiments, the color pattern of the visual color-changing fabric is consistent with the coating pattern of the hydrophilic resin layer on the base.

The present disclosure provides a visual color-changing fabric coated with a hydrophilic resin layer on the fabric, which can have a wide color viewing angle at both a vertical viewing angle and a horizontal viewing angle, has good visual change effects, and can Passes washability and chlorine resistance test specifications.

The spirit of the present disclosure will be clearly explained in the following drawings and detailed descriptions. Anyone with ordinary knowledge in the art, after understanding the preferred embodiments of the present disclosure, can make changes and modifications based on the techniques taught in the present disclosure. It does not depart from the spirit and scope of this disclosure.

The present disclosure provides a fabric that has an obvious visual color change effect and can improve the breathability of wearing. In particular, the disclosure provides a fabric that can pass the chlorine swimming water fastness (AATCC162-2002) standard test method, which usually refers to a chlorine content of 100ppm. Fabrics with obvious visual color change effects can still be maintained in the following environments. The relevant application areas can be extended to beaches, swimming pools, hot springs or water play, such as swimsuits, beach play wear, toys or teaching aids. The visual color-changing fabric disclosed in this disclosure is not limited to the pattern used in fabric design, nor is it limited to the type of raw material of the fabric yarn or the dyeing and finishing process. It can be based on the functional requirements of the purpose of use. Flexible combinations.

This disclosure provides a fabric with a visual color change. The hydrophilic resin combined with the fabric must have a reasonable weight ratio of soft and hard segments and isocyanate functional group content to achieve a visual color change effect, and through water washing resistance. Functionality and chlorine resistance testing cannot be achieved by simple design or simple replacement.

Refer to Figure 1, Figure 2A and Figure 2B, which are partial side views of one embodiment of the visual color changing fabric of the present disclosure in different states. The visual color changing fabric 100 includes a base portion 110, a folding portion 120, and a connecting portion 130 for connecting the base portion 110 and the folding portion 120. The base portion 110 is woven from the first yarn 112. The scene part 120 is woven from the second yarn 122. The folding portion 120 at least partially covers the base portion 110 . The base portion 110 and the folding portion 120 are releasably connected through the connecting portion 130 , that is, the folding portion 120 can selectively be substantially flat against the base portion 110 or have an opening relative to the base portion 110 . Angle.

The visual color changing fabric 100 further includes a hydrophilic resin layer 140 disposed on the folding portion 120 . After the hydrophilic resin layer 140 absorbs water vapor, its molecular structure changes and its shape changes. As a result, the folding portion 120 combined with the hydrophilic resin layer 140 will curl, causing the originally folded scenery to curl. The base portion 110 covered by the folding portion 120 is thus exposed, and because the folding portion 120 is curled, the yarn coverage area of the fabric is reduced and therefore the breathability is increased.

The folding portion 120 has a first color, the base portion 110 has a second color, and the first color and the second color are different. As shown in Figure 1, when the hydrophilic resin layer 140 has not absorbed moisture, the folding portion 120 is substantially flat against the base portion 110, and most of the base portion 110 is covered by the folding portion 120. Therefore, When the visual color changes, the fabric 100 presents the color of the appearance surface of the folding portion 120 .

Next, as shown in Figures 2A and 2B, when the hydrophilic resin layer 140 absorbs water vapor, its molecular structure changes and its shape changes, causing the combined folding portion 120 to curl. The base portion 110 of different colors is exposed, thereby causing the visual color of the fabric 100 to change.

In some embodiments, as shown in FIG. 2A , after absorbing water vapor, the molecular structure of the hydrophilic resin layer 140 changes, causing the shape to change, causing the combined folding portion 120 to curl outward. In other embodiments, the combined folding portion 120 is curled inward. Therefore, the hydrophilic resin layer 140 can determine the type of the combined folding portion to be outwardly curled or inwardly curled according to the ratio of its components.

Preferably, the water contact angle of the hydrophilic resin layer 140 is no more than 60 degrees. The hydrophilic resin layer 140 includes 11 to 40 weight percent of polyurethane hard segments and no more than 6 weight percent (including 0 to 6 weight percent) of isocyanate functional groups before curing reaction. In some embodiments, the weight percentage of the polyurethane hard segment in the hydrophilic resin layer 140 may be 11 to 16 weight percent, 16-22 weight percent, 22-28 weight percent, 28-34 weight percent, or 34-40 weight percent. percentage. For example, the weight percentage of the polyurethane hard segments in the hydrophilic resin layer 140 may be 11wt%, 12wt%, 13wt%, 14wt%, 15wt%, 16wt%, 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wt%, 36wt%, 37wt%, 38wt% , 39wt%, or 40wt%. In some embodiments, before curing reaction, the weight percentage of isocyanate functional groups in the hydrophilic resin layer 140 may be 0 to 6 weight percent or 3-6 weight percent. For example, the weight percentage of isocyanate functional groups in the hydrophilic resin layer 140 may be 0 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, or 6 wt%. If the polyurethane hard segment or the isocyanate functional group is higher than this range, the viscosity of the hydrophilic resin layer 140 will be too high and it will be difficult to print on the surface of the folding portion 120 . If the polyurethane hard segment or isocyanate functional group is lower than this range, the hydrophilic resin layer 140 will not be stable enough after being washed multiple times, making it difficult to achieve the purpose of curling the folding portion 120, resulting in an insufficient change in color development area. .

The folding section 120 has an outer page 124 and an inner page 126 connected, wherein the inner page 126 faces the base 110 and the outer page 124 is the appearance surface of the folding section 120 . In Figures 1, 2A, and 2B, the hydrophilic resin layer 140 is provided on the outer page 124 of the folding portion 120. In other embodiments, as shown in FIG. 3 , the hydrophilic resin layer 140 may be disposed on the inner page 126 of the folding portion 120 , or, as shown in FIG. 4 , the hydrophilic resin layer 140 may be disposed on the folding portion 126 . 120 on outer page 124 and inner page 126.

In some embodiments, the length of the folding portion 120 will substantially completely cover the base portion 110 , more specifically, completely cover the portion of the base portion 110 that does not coincide with the connecting portion 130 , so that the fabric 100 does not change the visual color. When moisture is absorbed and the folding portion 120 is substantially flat against the base portion 110 , the clothing pattern seen by the user will be presented by the appearance surface of the folding portion 120 . For example, if the length of the folding portion 120 is 4.5 mm and the length of the connecting portion 130 is 0.5 mm, then the length of the portion of the base portion 110 that does not overlap with the connecting portion 130 is 4.0 mm.

In some other embodiments, the length of the folding portion 120 is smaller than the length of the base portion 110 , that is, a portion of the base portion 110 that does not overlap with the connecting portion 130 will be partially exposed from the folding portion 120 . When the visual color change fabric 100 has not absorbed moisture and the folding portion 120 is substantially flat against the base portion 110, the clothing pattern seen by the user will be the appearance of the folding portion 120 and the base portion 110. presented together. For example, if the length of the folding portion 120 is 4.5 mm and the length of the connecting portion 130 is 0.5 mm, the length of the portion of the base portion 110 that does not overlap with the connecting portion 130 will be less than 4.0 mm.

In some embodiments, the first yarn 112 of the base portion 110 and the second yarn 122 of the folding portion 120 are yarns with basic strong properties, and their materials can be the same or different. Examples of types of the first yarn 112 and the second yarn 122 may be natural, artificial, or natural/artificial fiber mixed materials. Natural fibers include but are not limited to cotton, linen, wool, silk, etc.; artificial fibers include but are not limited to Polyester, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacrylonitrile, polyurethane, polyvinyl chloride, polyvinyl alcohol, polyolefin, etc. , can be arbitrarily changed according to the purpose of use, among which polyester is preferred.

In some embodiments, the hydrophilic resin layer 140 includes, but is not limited to, polyurethane resins generally having isocyanate groups, polyether polyurethane, polyester polyurethane, water-based polyurethane, solvent-based polyurethane, non-solvent polyurethane, polyether amino group Formate resin, polyester urethane resin, polyester-polyether urethane resin, polycarbonate urethane resin, etc.

In some embodiments, the first color of the first yarn 112 of the base portion 110 can be the color of the colored yarn itself, or the color of the dye through post-dyeing processing in the subsequent dyeing and finishing process, or transferred through a printing process. color. The second color of the second yarn 122 of the folding portion 120 can be the color of the colored yarn itself, or the color of the dye through post-dyeing processing in the subsequent dyeing and finishing process, or the color transferred through the printing process, where the base The first color of the portion 110 is different from the second color of the folding portion 120 .

It should be noted that the hydrophilic resin layer 140 will be printed on the surface of the folding portion 120 only after the woven fabric (including the base portion 110 , the folding portion 120 and the connecting portion 130 ) is dyed and finished. Therefore, the hydrophilic resin layer 140 can avoid contact with the liquid during the dyeing and finishing process, so that the visual color-changing fabric 100 will not undergo unnecessary deformation during the dyeing and finishing process, and the visual color-changing fabric 100 can be effectively maintained. of flatness. In some embodiments, the hydrophilic resin layer 140 may have a third color, and the third color of the hydrophilic resin layer 140 is different from the first color of the base portion 110 and the second color of the folding portion 120 .

In some embodiments, the fabric (including the base portion 110 , the folding portion 120 and the connecting portion 130 ) can be integrally formed by knitting. In some embodiments, the base portion 110 and the folding portion 120 can be manufactured separately, and then the base portion 110 and the folding portion 120 are connected together through the connecting portion 130, such as a sewing thread. The weaving method of the part 120 is not limited to knitting and can also be plain weaving or other suitable weaving methods.

Next, please refer to Figures 5 to 7, which are partial schematic diagrams of another embodiment of the disclosed visual color changing fabric at different manufacturing stages. First, as shown in FIG. 5 , a gray fabric 20 woven from the first yarn 212 and the second yarn 222 is provided. The first yarn 212 and the second yarn 222 can be arranged in sections. The types of the first yarn 212 and the second yarn 222 are as mentioned above and will not be repeated here. Next, as shown in FIG. 6 , a hot pressing process is performed to shape the base portion 210 woven from the first yarn 212 and the folding portion 220 woven from the second yarn 222 . The base portion 210 and the folding portion 220 are formed by hot pressing from the same piece of fabric 20, and no additional connecting portion or sewing thread is required between the base fabric 210 and the folding portion 220. Then, a series of dyeing and finishing processes are selectively performed to create the required patterns and colors on the base portion 210 and the folding portion 220 . In some embodiments, the folding portion 220 may completely cover the base portion 210 , or in other embodiments, a portion of the base portion 210 may be partially exposed from the folding portion 220 .

Next, as shown in FIG. 7 , a hydrophilic resin layer 230 is provided on the folding portion 220 . The folding section 220 has opposite outer pages 224 and inner pages 226, wherein the hydrophilic resin layer 230 can be disposed on the outer page 224 of the folding section 220, or on the inner page 226 of the folding section 220, or on the folding section 220. 220 on the outer page 224 and the inner page 226. The hydrophilic resin layer 230 will not be printed on the surface of the folding portion 220 until the green fabric 20 is dyed and finished. Therefore, the hydrophilic resin layer 230 can be prevented from contacting the liquid during the dyeing and finishing process, and therefore the visual color-changing fabric 200 will not undergo unnecessary deformation during the dyeing and finishing process, and the color-changing fabric 200 can be effectively maintained. Smoothness.

The first yarn 212 of the base portion 210 has a first color, and the second yarn 222 of the folding portion 220 has a second color, and the first color and the second color are different. As mentioned above, when the hydrophilic resin layer 230 has not absorbed moisture, the folding portion 220 is substantially flat against the base portion 210, and most of the base portion 210 is covered by the folding portion 220. Therefore, at this time The visual color change fabric 200 presents the color of the appearance surface of the folding portion 220 . When the hydrophilic resin layer 230 absorbs water vapor, the molecular structure of the hydrophilic resin changes, and the shape changes, causing the combined folding portion 220 to curl, and then the base portion 210 of different colors can be revealed. Let the visual color change. The visual color of the fabric 200 changes.

Preferably, the hydrophilic resin layer 230 contains 11 to 40 weight percent polyurethane hard segments, and before curing reaction, the hydrophilic resin layer 230 contains no more than 6 weight percent (including 0 to 6 weight percent) isocyanate functional groups. In some embodiments, the weight percentage of the polyurethane hard segment in the hydrophilic resin layer 140 may be 11 to 16 weight percent, 16-22 weight percent, 22-28 weight percent, 28-34 weight percent, or 34-40 weight percent. percentage. For example, the weight percentage of the polyurethane hard segments in the hydrophilic resin layer 140 may be 11wt%, 12wt%, 13wt%, 14wt%, 15wt%, 16wt%, 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wt%, 36wt%, 37wt%, 38wt% , 39wt%, or 40wt%. In some embodiments, the weight percentage of the isocyanate functional groups in the hydrophilic resin layer 140 may be 0 to 6 weight percent or 3-6 weight percent before curing reaction. For example, the weight percentage of isocyanate functional groups in the hydrophilic resin layer 140 may be 0 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, or 6 wt%. If both the polyurethane hard segment and the isocyanate functional group exceed the aforementioned range, the viscosity of the hydrophilic resin layer 230 will be too high and it will be difficult to print on the surface of the folding portion 220; therefore, if the polyurethane hard segment and the isocyanate functional group cannot meet the requirements at the same time, Within this range, the viscosity of the hydrophilic resin layer 230 may be too high, making it difficult to print on the surface of the folding portion 220 . If the polyurethane hard segment or the isocyanate functional group is lower than this range, the hydrophilic resin layer 230 may not be stable enough after repeated washings, making it difficult to achieve the purpose of curling the folding portion 220, resulting in changes in the color development area. Not obvious enough.

In some embodiments, the hydrophilic resin layer 230 may have a third color, and the third color of the hydrophilic resin layer 230 is different from the first color of the first yarn 212 of the base portion 210 and the second yarn of the folding portion 220 222's second color.

Refer to Figures 8A to 8H, which are partial top views of different embodiments of the visual color changing fabric of the present disclosure. In the visual color changing fabric 300, the coverage rate of the hydrophilic resin layer 320 provided on the folding portion 310 is 10% to 99%.

In some embodiments, the hydrophilic resin layer 320 is printed on the folding portion 310 through gravure printing. For example, the molten hydrophilic resin can flow onto the printing roller, and then use a scraper to scrape off the excess hydrophilic resin. Then, the printing roller can be brought into contact with the surface of the fabric after dyeing and finishing, so that the dye stored in the groove of the printing roller can be used. The hydrophilic resin is transferred to the surface of the fabric and adsorbed to the cavities or recesses on the surface of the fabric. Finally, the fabric is dried, and after the cross-linking reaction of the hydrophilic resin is completed and solidified, the visual color-changing fabric 300 provided with the patterned hydrophilic resin layer 320 can be obtained.

The pattern of the hydrophilic resin layer 320 may be a continuous grid pattern as shown in Figure 8A, or a continuous block pattern as shown in Figure 8B. Alternatively, the pattern of the hydrophilic resin layer 320 may be a discontinuous solid or hollow pattern, and the discontinuous pattern may be dots, lines, strips, squares, circles, ovals, polygons, irregular graphics, or a combination thereof. , as shown in Figures 8C to 8H.

The basic structure of hydrophilic resin includes a hard segment structure and a soft segment structure. The composition and content of the hard segment will affect the hydrogen bonding ability of the molecule, the degree of micro-phase separation, and the crystallization properties of the overall molecule. The composition of the soft segment will affect the softness and hydrophilicity of the overall molecule, so the molecular composition and structure of the soft and hard segments, the number and size of the monomers, and the weight ratio of the soft and hard segments to the total hydrophilic resin All are key factors that determine physical properties.

The hydrophilic resin layer used in the visual color-changing fabric of the present disclosure is composed of polyether polyol or polyester polyol or polycarbonate long-chain segment polyol or polyether polyamine as the main soft segment structure; Use isocyanate as the main structural component of the hard segment, react to form an isocyanate-terminated (-NCO) prepolymer, and then undergo a maturation and curing reaction to form a hydrophilic resin. Optionally, the polyether or polyester polyol can be a crystalline polyol or an amorphous polyol. From the perspective of improving hydrophilicity and water washing resistance, the weight average molecular weight of the polyether or polyester polyol can be 400. ~1000, 800~4000 or 2000~8000. Preferably, the weight average molecular weight of the polyether or polyester polyol ranges from 400 to 8000. More preferably, the polyether polyol is a modified polyether polyol with an ester group, a polyether polyol with a amide group, or any combination of the above. The hydrophilic resin layer used in this fabric has a hard segment with a weight average molecular weight of less than 1,000 and a soft segment connected to the hard segment with a weight average molecular weight of more than 400. The soft segment and the hard segment are It is formed by polymerization reaction with an isocyanate compound. Optionally, the isocyanate compound is such as but not limited to methyl isocyanate (Methyl Isocyanate), toluene isocyanate (Toluene Diisocyanate), diphenylmethane diisocyanate (Methylene diphenyl diisocyanate, referred to as MDI), diacetate Toluene diisocyanate (XDI for short), Toluene diisocyanate (TDI for short), Isophorone diisocyanate (IPDI for short), hexamethylene diisocyanate ( Hexamethylene diisocyanate (HDI for short), Methylidintri-p-phenylen triisocyanate (Methylidintri-p-phenylen triisocyanate), 4,4'-Methylenebis cyclohexyl isocyanate (HMDI for short), 4,4 '-Dimethyldiphenylmethane-2,2',5,5'-tetraisocyanate (2,2'-dimethyldiphenylmethane-3,3',5,5'-tetraisocyanate), or methine polyphenylene isocyanate (Poly methylene phenyl isocyanate)) etc.

Furthermore, the hard segment composition includes short-segment alcohols, low molecular weight chain extenders or cross-linking agents. Optionally, short-segment alcohols can be used alone or in a mixture of multiple types, and short-segment alcohols such as but not Limited to those selected from the group consisting of ethylene glycol, 1,4-butanediol, 1,6hexanediol, diethylethylene glycol, triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, and neopentyl glycol. Alcohol, glycerin, optionally, the low molecular weight chain extender or cross-linking agent can be selected from ethylenediamine, triethylamine, n-butylamine, ethanolamine, and trimethylolpropane (TMP).

The hydrophilic resin generation reaction can be carried out in the melt or solution. When reacting in the melt, side reactions caused by excessive temperature must be avoided. During the reaction process, the viscosity will gradually increase. Insufficient stirring must be avoided, which may cause the reaction. Incomplete, or the reaction is too fast, causing the viscosity to be too high and the resin cannot be used. The synthesis reaction of hydrophilic resin roughly consists of two steps: prepolymerization and chain extension reaction. Through prepolymerization, isocyanate and long-chain polyol are formed into oligomers containing isocyanate end groups -N=C=O; Through the chain extension reaction, the molecular structure changes from a linear structure to a three-dimensional structure. Due to different reaction conditions, the weight ratio of the isocyanate functional group content to the soft and hard segments of the compound is different, the structure of the hydrophilic resin is very different, so the degree of hydrophilicity Differently, hydrophilicity is determined by using the water contact angle (θ) test value. The conventional way to measure the water contact angle is to apply a hydrophilic resin layer to a flat solid surface (such as glass) for measurement. When observing a liquid (such as a moisture droplet) in contact with a flat solid surface, along the angle between the liquid surface and the solid surface (the angle inside the liquid), the angle is called the contact angle, which is a kind of affinity (wetting property) with water. ), if the contact angle is less than 10 degrees, the surface can be called super hydrophilic, 10 to 30 degrees is strongly hydrophilic, 30 to 60 degrees is general hydrophilic, and 90 to 120 degrees is hydrophobic. .

But in fact, the hydrophilic resin layer used in this visual color-changing fabric will change its shape due to volume swelling after infiltration, especially the height change of the surface of the resin layer. Sometimes the stress generated by the shrinkage of the volume will cause the surface to curl. Or surface extrusion, sometimes due to single-point expansion of the resin layer plane, resulting in local heaping or local subsidence, which makes the hydrophilic resin layer unable to continuously maintain the flatness of the surface, resulting in a surface roughness, so the measurement of the water contact angle Errors may occur. But overall, when moisture comes into contact with the hydrophilic resin layer, it will be quickly absorbed and escaped, completely wetting the surface of the hydrophilic resin layer, or the moisture will enter the interior of the hydrophilic resin layer (usually within 30 seconds), causing the resin layer to form The water contact angle of the hydrophilic resin is less than 10 degrees and it is super hydrophilic; if the water droplets are A change in contact angle is produced on the surface of the hydrophilic resin layer from large to small. The difference in angle change is judged to have a water contact angle between 30 and 60 degrees. When water is absorbed relatively quickly (from large to small If the angle changes quickly, usually within 1 minute), the water contact angle is determined to be 30 degrees, which is strongly hydrophilic; when the speed of water absorption is relatively slow (from large to small, the angle changes slowly, usually within 1 to 3 within minutes), but it can still be observed that the liquid moisture is gradually absorbed, and the water contact angle is determined to be 60 degrees, which is generally hydrophilic.

The composition structure and dosage ratio of the soft and hard segments of the hydrophilic resin layer used in the visual color-changing fabric disclosed in the present disclosure can be appropriately changed according to the visual color-changing requirements of the fabric to be matched, but the relevant changes must still follow the hydrophilic combination. The resin layer must contain 11 to 40 weight percent of polyurethane hard segments and, after polymerization and before curing, contain no more than 6 weight percent (including 0 to 6 weight percent) of isocyanate functionality. Otherwise, the prepared fabric will be difficult to pass the washing test and cannot be actually used. In some embodiments, the weight percentage of the polyurethane hard segment in the hydrophilic resin layer 140 may be 11 to 16 weight percent, 16-22 weight percent, 22-28 weight percent, 28-34 weight percent, or 34-40 weight percent. percentage. For example, the weight percentage of the polyurethane hard segments in the hydrophilic resin layer 140 may be 11wt%, 12wt%, 13wt%, 14wt%, 15wt%, 16wt%, 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wt%, 36wt%, 37wt%, 38wt% , 39wt%, or 40wt%. In some embodiments, before curing reaction, the weight percentage of the isocyanate functional groups in the hydrophilic resin layer 140 may be 0 to 6 weight percent or 3-6 weight percent. For example, the weight percentage of isocyanate functional groups in the hydrophilic resin layer 140 may be 0 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, or 6 wt%.

The preparation methods of each embodiment and each comparative example will be disclosed below to further describe the features and effects of the present disclosure. It should be understood that the materials used, their amounts and proportions, processing details, processing procedures, etc. may be appropriately changed without exceeding the scope of this disclosure. Therefore, the present disclosure should not be construed as limiting by the preparation methods described below.

Preparation methods of Examples 1 to 18 and Comparative Examples 1 to 7: Add the soft segment composition materials and hard segment composition materials used in the experiment into the reaction vessel, mix them evenly, and perform a temperature-raising reaction until the reaction is completed. The hydrophilic layer resin is obtained until the content rate of the isocyanate group reaches the composition setting target value. The specific implementation is shown in Table 1 below.

Table I preparation method Examples 1~18 Comparative Examples 1~2, 6~7 Comparative examples 3~5 Melt dispersion Melt dispersion solvent dispersion soft segment Optional long chain segment polyols, polyamines Polyether polyol, polyester polyol, polycarbonate polyol, and polyether polyamine can be used singly or in combination. hard segment Optional short chain polyol, optional isocyanate, and optional chain extender or cross-linker Ethylene glycol, 1,4-butanediol, 1,6hexanediol, diethylglycol, triethylene glycol, propylene glycol, butylene glycol, diethylene glycol, neopentyl glycol, propylene glycol Triol, ethylenediamine, triethylamine, n-butylamine, ethanolamine, and trihydroxymethylpropane can be used alone or in combination. Isocyanate compounds, such as: TDI, MDI, HDI, HMDI, IPDI, XDI, are used alone or in combination. reactor Stirring type Stirring type Stirring type reaction temperature 50℃~130℃ 50℃~130℃ 50℃~130℃ dispersed matter Prepolymer melt Prepolymer melt Distilled water or organic solvent Post-dispersion reaction steps polymerization reaction polymerization reaction polymerization reaction Maturation and solidification temperature 30℃~100℃ 30℃~100℃ -

<Example 1-Resin 1>

Resin 1 is a solvent-free polyurethane resin, which is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 12.11 weight percent, and before curing reaction, it has an isocyanate functional group content of 3.63 weight percent. , the resin forms a film layer after the reaction matures and solidifies. The film layer infiltration rate is measured to be 250~400%, the water contact angle is less than 10 degrees (moisture is quickly absorbed and escapes on the film surface), and it is super hydrophilic.

<Example 2-Resin 2>

Resin 2 is a solvent-free polyurethane resin that is reacted and polymerized in a melt state. After the polymerization reaction is completed, the polyurethane hard segment is 11.02 weight percent, and before curing reaction, it has an isocyanate functional group content of 2.72 weight percent. , Resin 2 forms a film layer after reaction, maturation and solidification. The film layer infiltration rate is measured to be 250~400%, the water contact angle is less than 10 degrees (moisture is quickly absorbed and escapes on the film surface), and it is super hydrophilic.

<Example 3-Resin Three>

Resin 3 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 15.24 weight percent, and before curing reaction, it has an isocyanate functional group content of 3.81 weight percent. , Resin 3 forms a film layer after reaction, maturation and solidification. The infiltration rate of the film layer is measured to be 250~400%, the water contact angle is less than 10 degrees (moisture is quickly absorbed and escapes on the film surface), and it is super hydrophilic.

<Example 4-Resin Four>

Resin 4 is a solvent-free polyurethane resin that is reacted and polymerized in a melt state. After the polymerization reaction is completed, the polyurethane hard segment is 12.21 weight percent, and before curing reaction, it has an isocyanate functional group content of 4.21 weight percent. , Resin 4 forms a film layer after reaction, maturation and solidification. The film layer infiltration rate is measured to be 250~400%, the water contact angle is less than 10 degrees (moisture is quickly absorbed and escapes on the film surface), and it is super hydrophilic.

<Example 5-Resin 5>

Resin 5 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 19.95 weight percent, and before curing reaction, it has an isocyanate functional group content of 3.03 weight percent. , Resin 5 forms a film layer after reaction, maturation and solidification. The film layer infiltration rate is measured to be 250~400%, the water contact angle is less than 10 degrees (moisture is quickly absorbed and escapes on the film surface), and it is super hydrophilic.

<Example 6-Resin 6>

Resin 6 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 11.94 weight percent, and before curing reaction, it has an isocyanate functional group content of 5.09 weight percent. , Resin VI forms a film layer after reaction, maturation and solidification. The film layer infiltration rate is measured to be 250~400%, the water contact angle is less than 10 degrees (moisture is quickly absorbed and escapes on the film surface), and it is super hydrophilic.

<Example 7-Resin 7>

Resin 7 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 21.95 weight percent, and before curing reaction, it has an isocyanate functional group content of 5.51 weight percent. Resin 7 forms a film layer after reaction, maturation and solidification. The film infiltration rate is measured to be 150~250%, the water contact angle is less than 30 degrees (the contact angle of water droplets changes rapidly from large to small), and it is highly hydrophilic.

<Example 8-Resin 8>

Resin 8 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 20.40 weight percent, and before curing reaction, it has an isocyanate functional group content of 3.18 weight percent. Resin 8 forms a film layer after reaction, maturation and solidification. The wettability of the film layer is measured to be 150~250%, the water contact angle is less than 30 degrees (the contact angle of water droplets changes rapidly from large to small), and it is highly hydrophilic.

<Example 9-Resin 9>

Resin 9 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 20.40 weight percent, and before curing reaction, it has an isocyanate functional group content of 3.26 weight percent. Resin 9 forms a film layer after reaction, maturation and solidification. The film infiltration rate is measured to be 150~250%, the water contact angle is less than 30 degrees (the contact angle of water droplets changes rapidly from large to small), and it has strong hydrophilicity.

<Example 10-Resin 10>

Resin 10 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 20.50% by weight, and before curing reaction, it has an isocyanate functional group content of 3.52% by weight. , the resin 10 forms a film layer after the reaction is matured and solidified. The wettability of the film layer is measured to be 150~250%, the water contact angle is less than 30 degrees (the contact angle of the water droplets changes rapidly from large to small), and it is highly hydrophilic.

<Example 11-Resin 11>

Resin 11 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 18.30% by weight, and before curing reaction, it has 3.04% by weight of isocyanate functional groups. Content, resin 11 forms a film layer after reaction, maturation and solidification. The film infiltration rate is measured to be 150~250%, the water contact angle is less than 30 degrees (the contact angle of water droplets changes rapidly from large to small), and it has strong hydrophilicity sex.

<Example 12-Resin 12>

Resin 12 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 18.78 weight percent, and before curing reaction, it has 4.50 weight percent isocyanate functional groups. Content, resin 12 forms a film layer after reaction, maturation and solidification. The infiltration rate of the film layer is measured to be 150~250%, the water contact angle is less than 30 degrees (the contact angle of water droplets changes rapidly from large to small), and it has strong hydrophilicity sex.

<Example 13-Resin Thirteen>

Resin 13 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 21.91% by weight, and before curing reaction, it has 5.40% by weight of isocyanate functional groups. Content, resin 13 forms a film layer after reaction, maturation and solidification. The infiltration rate of the film layer is measured to be 50~150%, the water contact angle is less than 60 degrees (the contact angle of water droplets changes gradually from large to small), and it has general hydrophilicity sex.

<Example 14-Resin Fourteen>

Resin 14 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 24.91 weight percent, and before the curing reaction, it has 2.74 weight percent isocyanate functional groups. Content, resin 14 forms a film layer after reaction, maturation and solidification. The film infiltration rate is measured to be 50~150%, the water contact angle is less than 60 degrees (the contact angle of water droplets changes gradually from large to small), and it has general hydrophilicity sex.

<Example 15-Resin Fifteen>

Resin 15 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 24.97% by weight, and before curing reaction, it has 5.85% by weight of isocyanate functional groups. Content, the resin 15 forms a film layer after reaction, maturation and solidification. The film infiltration rate is measured to be 50~150%, the water contact angle is less than 60 degrees (the contact angle of the water droplets changes gradually from large to small), and it has general hydrophilicity sex.

<Example 16-Resin 16>

Resin 16 is a solvent-free polyurethane resin that is reacted and polymerized in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 32.80 weight percent, and before curing reaction, it has 5.98 weight percent isocyanate functional groups. Content, resin 16 forms a film layer after reaction, maturation and solidification. The film infiltration rate is measured to be 50~150%, the water contact angle is less than 60 degrees (the contact angle of water droplets changes gradually from large to small), and it has general hydrophilicity sex.

<Example 17-Resin Seventeen>

Resin 17 is a solvent-free polyurethane that reacts and polymerizes in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 39.59 weight percent, and the isocyanate functional groups have all reacted and cannot be detected (equivalent to 0 weight percent). Resin 17 forms a film layer after drying and solidification. The wettability of the film layer is measured to be 50~150%, the water contact angle is less than 60 degrees (the contact angle of water droplets gradually changes from large to small), and it has general hydrophilicity.

<Example 18-Resin 18>

Resin 18 is a solvent-free polyurethane that reacts and polymerizes in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 11.18 weight percent, and the isocyanate functional groups have all reacted and cannot be detected (equivalent to 0 weight percent). The resin 18 forms a film layer after drying and solidification. The infiltration rate of the film layer is measured to be 50~150%, the water contact angle is less than 60 degrees (the contact angle of water droplets gradually changes from large to small), and it has general hydrophilicity.

<Comparative Example 1-Resin Nineteen>

Resin 19 is a solvent-free polyurethane resin that reacts and polymerizes in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 50.44 weight percent, and before curing reaction, it has an isocyanate functional group content of 7.63 weight percent. The resin Nineteen forms a film layer after the reaction is matured and solidified. The measured film infiltration rate is less than 50%, and the water contact angle is greater than 60 degrees (the contact angle of the water droplets remains unchanged. It is obvious that resin nineteen is not hydrophilic). The resin Formula 19 has a higher proportion of polyurethane hard segments and a higher content of isocyanate functional groups, which causes the surface layer to be too rigid after curing and has poor hydrophilicity and poor color development.

<Comparative Example 2-Resin Twenty>

Resin 20 is a solvent-free polyurethane that reacts and polymerizes in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 8.16 weight percent. Before curing reaction, the isocyanate functional group content is 2.57 weight percent. Resin 20 After the reaction is matured and solidified, a film layer is formed. The wettability of the film layer is measured to be less than 50%, and the water contact angle is greater than 60 degrees (the contact angle of the water droplets remains unchanged, and it is obvious that the resin 20 is not hydrophilic). The proportion of polyurethane hard segments in the Resin Twenty formula is low, resulting in the surface layer not being well cured, poor hydrophilicity, and poor color development.

<Comparative Example 3-Resin 21>

Resin 21 is a solvent-based polyurethane that reacts and polymerizes in a solvent state. After the polymerization reaction is completed, the hard segment is 42.75% by weight. The isocyanate functional groups of Resin 21 have all reacted (equivalent to 0% by weight) and cannot It was detected that Resin 21 formed a film layer after drying and solidification. The infiltration rate of the film layer was measured to be less than 50%, and the water contact angle was greater than 60 degrees (the contact angle of the water droplets remained unchanged. It is obvious that Resin 21 does not have the hydrophilic). The resin 21 formula has a high proportion of polyurethane hard segments, which causes the surface layer to be too rigid after curing and has poor hydrophilicity and poor color development.

＜Comparative Example 4-Resin 22＞

Resin 22 is a solvent-based polyurethane that reacts and polymerizes in a solvent state. After the polymerization reaction is completed, the hard segment is 8.14% by weight. The isocyanate functional groups of Resin 22 have all reacted and cannot be detected (equivalent to 0 weight percentage), Resin 22 forms a film layer after drying and solidification. The measured film infiltration rate is less than 50%, and the water contact angle is greater than 60 degrees (the contact angle of the water droplets remains unchanged. It is obvious that Resin 22 does not have the hydrophilic). The proportion of polyurethane hard segments in the Resin 22 formula is low, resulting in poor curing of the surface layer, poor hydrophilicity, and poor color development.

＜Comparative Example 5-Resin 23＞

Resin 23 is a water-based polyurethane. It is dispersed in an aqueous solution after polymerization. After the polymerization reaction is completed, the hard segment is 30.36 weight percent. The isocyanate functional group of Resin 23 has completed the reaction and cannot be detected (equivalent to 0 weight percent ), Resin 23 forms a film layer after drying and solidification. The measured film infiltration rate is less than 50%, and the water contact angle is greater than 60 degrees (the contact angle of the water droplets remains unchanged. It is obvious that Resin 23 is not hydrophilic. sex). The formula of Resin 23 has poor hydrophilicity and poor color development.

＜Comparative Example 6-Resin 24＞

Resin 24 is a solvent-free polyurethane that reacts and polymerizes in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 4.45 weight percent. Before curing reaction, the isocyanate functional group content is 1.22 weight percent. Resin 2 The infiltration rate of the film layer measured by Resin 24 is 150~250%, and the water contact angle is less than 30 degrees. However, the film layer cannot be well cured after the reaction is matured. It is speculated that the reason is that the proportion of polyurethane hard segments in the Resin 24 formula is low, resulting in The surface layer cannot be cured well, the water contact angle is less than 30 degrees, and it is hydrophilic. It has color development effect before water washing, but the resin film-forming property is not good, resulting in poor color development effect after water washing.

＜Comparative Example 7-Resin 25＞

Resin 25 is a solvent-free polyurethane that reacts and polymerizes in the melt state. After the polymerization reaction is completed, the polyurethane hard segment is 8.05 weight percent. Before curing reaction, the isocyanate functional group content is 1.13 weight percent. Resin 25 14. The measured infiltration rate of the film layer is 150~250%, the water contact angle is less than 30 degrees, and the film layer cannot be well solidified after the reaction matures. It is speculated that the reason is that the proportion of polyurethane hard segments in the resin twenty-five formula is low, resulting in the surface layer not being well cured. The water contact angle is less than 30 degrees. It is hydrophilic and has a color development effect before water washing. However, the film-forming property of the resin is poor. , resulting in poor color development after washing.

Relevant physical property testing methods and specifications:

＜Measurement method of isocyanate functional group (-NCO) content＞

Dissolve di-n-butylamine in isopropyl alcohol, react with the isocyanate functional group of the resin sample, and titrate the excess di-n-butylamine with a hydrochloric acid standard solution to calculate the isocyanate functional group in the resin sample. base content.

＜Measurement of Film Wetness Rate＞

Referring to the ISO 175 specification, take a sample with an area of 60mm*60mm and a thickness of about 0.05~0.1mm, place it in water at 23±℃, and soak it for about 2 hours. After taking out the sample, wipe the surface moisture of the sample clean, and measure the penetration The weight of the sample before and after immersion is calculated, and the weight difference is calculated to calculate the moisture infiltration rate of the sample. The sample must undergo reaction, aging and solidification to form a film layer before it can be tested.

＜Measurement of water contact angle＞

Water contact angle measuring instrument (Brand: Kruss; Model: FM40), the resin is coated on a cloth base material, and then dried to form a film layer on the cloth base material, and then the film is Water droplets were dropped on the surface of the layer and measured with the above-mentioned water contact angle measuring instrument to obtain the water contact angle.

＜Test method for horizontal color viewing angle＞

The detection method is to place the cloth upright at a distance of 1 meter in front of the observer. The position of the cloth is basically at the same level as the human eye. The cloth is fixed and the observer's front view moves horizontally left and right to maximize observation. The angle at which the fabric changes color is the horizontal color viewing angle range.

＜Test method for vertical color viewing angle＞

The detection method is to place the cloth upright at a distance of 1 meter in front of the observer. The cloth is fixed and the observer's front view moves up and down at a vertical angle. The angle at which the change in color of the cloth can be observed to the greatest extent is Vertical color viewing angle range.

＜Washing resistance test＞

Use a washing machine that complies with AATCC-LP1 specifications and conduct repeated washing/drying tests in accordance with the AATCC-135 method.

＜Chlorine resistance test＞

Soak in a sodium hypochlorite (NaClO) aqueous solution with a temperature of 25°C, a pH of 6~7, and a chlorine concentration of 100 ppm for 168 hours.

＜Definition and test method of color rendering area＞

The color area rate is defined as the color change area ratio of the fabric before and after moisture infiltration (moisture absorption). The calculation method is: (the area of the base hidden under the folding part before infiltration – exposed under the folding part after infiltration) area)/(the area of the base hidden under the folding part before infiltration) x100%.

＜Experimental Example 1＞

In Experimental Example 1, the resins 1 to 25 of Examples 1 to 18 and Comparative Examples 1 to 7 were printed on the outer page of the folding part in a continuous hexagonal pattern. The viewing angles are shown in Table 2. The formulas of Examples 6 to 12 and Example 17 and the formulas of Comparative Examples 6 and 7 were used to perform water washing test and chlorine resistance test verification (static immersion in sodium hypochlorite aqueous solution, chlorine concentration 100ppm) before and after results and measurements The color development area and the results are shown in Table 3. It can be seen from Table 2 that when the water contact angle of the hydrophilic resin layer cannot be less than 60 degrees, as shown in Comparative Examples 1 to 5, good color viewing angles (including horizontal and vertical viewing angles) cannot be achieved. It can be known from Table 3 that when the hydrophilic resin layer cannot simultaneously meet the requirements of a polyurethane hard segment containing 11 to 40 weight percent and an isocyanate functional group of no more than 6 weight percent (including 0 to 6 weight percent) before curing reaction, Under the resin composition conditions, as shown in Comparative Examples 6 to 7, the resin cannot form a film smoothly, does not have good film-forming properties, and the fabric prepared is difficult to pass the water washing test. Therefore, based on the comprehensive judgment from the experimental results in Tables 2 to 3, when the water contact angle of the hydrophilic resin layer cannot be less than 60 degrees, and at the same time, it contains 11 to 40 weight percent of polyurethane hard segments and has a polyurethane hard segment of no more than 6 before curing reaction. When the resin composition condition is 0 to 6 weight percent (including 0 to 6 weight percent) of isocyanate functional groups, the fabric prepared cannot have good color development effect, and is difficult to pass the water washing test and cannot be actually used.

Table 2 - Color rendering effect verification Hydrophilic layer resin Weight percentage (%) of polyurethane hard segment composition Weight percentage (%) of isocyanate functional group content without curing reaction water contact angle Wetting rate of the film layer formed after reaction maturation and solidification (%) Maximum range of color rendering viewing angles horizontal direction vertical direction Example 1 Solvent-free polyurethane 12.11 3.63 <10º 250~400% 170º 170º Example 2 11.02 2.72 <10º 250~400% 170º 170º Example 3 15.24 3.81 <10º 250~400% 170º 170º Example 4 12.21 4.21 <10º 250~400% 170º 170º Example 5 19.95 3.03 <10º 250~400% 170º 170º Example 6 11.94 5.09 <10º 250~400% 170º 170º Example 7 21.95 5.51 <30º 150~250% 170º 150º Example 8 20.40 3.18 <30º 150~250% 170º 150º Example 9 20.40 3.26 <30º 150~250% 170º 150º Example 10 20.50 3.52 <30º 150~250% 170º 150º Example 11 18.30 3.04 <30º 150~250% 170º 150º Example 12 18.78 4.50 <30º 150~250% 170º 150º Example 13 21.91 5.40 <60º 50~150% 170º 120º Example 14 24.91 2.74 <60º 50~150% 170º 120º Example 15 24.97 5.85 <60º 50~150% 170º 120º Example 16 32.80 5.98 <60º 50~150% 170º 120º Example 17 39.59 0 <60º 50~150% 170º 120º Example 18 11.18 0 <60º 50~150% 170º 120º Comparative example 1 Solvent-free polyurethane 50.44 7.63 >60º <50% Unable to develop color Comparative example 2 8.16 2.57 >60º <50% Unable to develop color Comparative example 3 Solvent-based polyurethane 42.75 0 >60º <50% Unable to develop color Comparative example 4 8.14 0 >60º <50% Unable to develop color Comparative example 5 water-based polyurethane 30.36 0 >60º <50% Unable to develop color Comparative example 6 Solvent-free polyurethane 4.45 1.22 <30º 150~250% The color can develop before washing with water, but cannot develop after washing with water. Comparative example 7 8.05 1.13 150~250%

Table 3 - Color development area verified by water washing test and chlorine resistance test Weight percentage (%) of polyurethane hard segment composition Weight percentage (%) of isocyanate functional group content before curing reaction Color area % Washing resistance test Chlorine resistance test Before washing Washed 20 times 0hr Sodium hypochlorite aqueous solution (chlorine concentration 100ppm) after static soaking for 168 hours Example 6 11.94 5.09 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 7 21.95 5.51 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 8 20.40 3.18 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~ 37.5% Example 9 20.40 3.26 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 10 20.50 3.52 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 11 18.30 3.04 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~ 37.5% Example 12 18.78 4.50 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 17 39.59 0 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Comparative example 6 4.45 1.22 27.5%~37.5% Unable to develop color 27.5%~37.5% Unable to develop color Comparative example 7 8.05 1.13 27.5%~37.5% Unable to develop color 27.5%~37.5% Unable to develop color

＜Experimental Example 2＞

In Experimental Example 2, the resins 1 to 25 of Examples 1 to 18 and Comparative Examples 1 to 7 were printed on the outer page of the folding part in a pattern of discontinuous dots. The color viewing angle is shown in Table 4. When the hydrophilic layer resin cannot meet the condition of a water contact angle of less than 60 degrees, it cannot show good color viewing angle (including horizontal and vertical viewing angles). In addition, Example 6 to Example 12, Example 17 and Comparative Example 6 and Comparative Example 7 were used to conduct water washing test and chlorine resistance test verification (static immersion in sodium hypochlorite aqueous solution, chlorine concentration 100ppm) before and after results and measure the color development area , the results are shown in Table 5, when the hydrophilic resin layer cannot simultaneously meet the requirements of a polyurethane hard segment resin containing 11 to 40 weight percent and an isocyanate function of no more than 6 weight percent (including 0 to 6 weight percent) before curing reaction. When the base resin composition conditions are different, as shown in Comparative Examples 6 to 7, the resin cannot form a film smoothly, does not have good film-forming properties, and is difficult to pass the water washing test. Therefore, judging from the experimental results in Table 4 to Table 5, it can be known that when the water contact angle of the hydrophilic resin layer cannot be less than 60 degrees, it cannot simultaneously meet the requirements of containing 11 to 40 weight percent of polyurethane hard segments and having an insufficiency before curing reaction. With a resin composition of more than 6 weight percent (including 0 to 6 weight percent) of isocyanate functional groups, the fabric prepared cannot exhibit good color development and is difficult to pass the water washing test and cannot be actually used.

Table 4 - Color rendering effect verification Hydrophilic layer resin Weight percentage (%) of polyurethane hard segment composition Weight percentage (%) of isocyanate functional group content before curing reaction water contact angle Maximum range of color rendering viewing angles horizontal direction vertical direction Example 1 Solvent-free polyurethane 12.11 3.63 <10º 170º 170º Example 2 11.02 2.72 <10º 170º 170º Example 3 15.24 3.81 <10º 170º 170º Example 4 12.21 4.21 <10º 170º 170º Example 5 19.95 3.03 <10º 170º 170º Example 6 11.94 5.09 <10º 170º 170º Example 7 21.95 5.51 <30º 170º 150º Example 8 20.40 3.18 <30º 170º 150º Example 9 20.40 3.26 <30º 170º 150º Example 10 20.50 3.52 <30º 170º 150º Example 11 18.30 3.04 <30º 170º 150º Example 12 18.78 4.50 <30º 170º 150º Example 13 21.91 5.40 <60º 170º 120º Example 14 24.91 2.74 <60º 170º 120º Example 15 24.97 5.85 <60º 170º 120º Example 16 32.80 5.98 <60º 170º 120º Example 17 39.59 0 <60º 170º 120º Example 18 11.18 0 <60º 170º 120º Comparative example 1 Solvent-free polyurethane 50.44 7.63 >60º Unable to develop color Comparative example 2 8.16 2.57 >60º Unable to develop color Comparative example 3 Solvent-based polyurethane 42.75 0 >60º Unable to develop color Comparative example 4 8.14 0 >60º Unable to develop color Comparative example 5 water-based polyurethane 30.36 0 >60º Unable to develop color Comparative example 6 Solvent-free polyurethane 4.45 1.22 <30º The color can develop before washing with water, but cannot develop after washing with water. Comparative example 7 8.05 1.13

Table 5 - Color development area verified by water washing test and chlorine resistance test Weight percentage (%) of polyurethane hard segment composition Weight percentage (%) of isocyanate functional group content before curing reaction Color area % Washing resistance test Chlorine resistance test Before washing Washed 20 times 0hr Sodium hypochlorite aqueous solution (chlorine concentration 100ppm) after static soaking for 168 hours Example 6 11.94 5.09 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 7 21.95 5.51 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 8 20.40 3.18 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~ 37.5% Example 9 20.40 3.26 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 10 20.50 3.52 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 11 18.30 3.04 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~ 37.5% Example 12 18.78 4.50 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Example 17 39.59 0 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% 27.5%~37.5% Comparative example 6 4.45 1.22 27.5%~37.5% Unable to develop color 27.5%~37.5% Unable to develop color Comparative example 7 8.05 1.13 27.5%~37.5% Unable to develop color 27.5%~37.5% Unable to develop color

＜Experimental Example 3＞

In Experimental Example 3, the resins 1 to 25 of the aforementioned Examples 1 to 18 and Comparative Examples 1 to 7 were printed on one side of the base of the woven fabric in a discontinuous linear pattern. The printed area of the hydrophilic layer accounts for about 40% of the total area of the fabric base layer, and its color viewing angle is shown in Table 6. When the hydrophilic layer resin cannot meet the condition of a water contact angle of less than 60 degrees, it cannot show good display. Color viewing angle (including horizontal and vertical viewing angles). In addition, Examples 7 to 12 and Comparative Examples 6 and 7 were used to perform the water washing test and chlorine resistance test (static immersion in sodium hypochlorite aqueous solution, chlorine concentration 100 ppm) before and after results were measured and the color development area was measured. The results are shown in Table 7. shown. It can be known from Table 6 to Table 7 that when the water contact angle of the hydrophilic resin layer cannot be less than 60 degrees, and at the same time it must contain 11 to 40 weight percent of polyurethane hard segments and no more than 6 weight percent (including When the resin composition conditions are 0 to 6 weight percent) isocyanate functional groups, as shown in Comparative Examples 6 to 7, the fabrics prepared are difficult to pass the water washing test and cannot be practically used.

Table 6 - Color rendering effect verification Hydrophilic layer resin Weight percentage (%) of polyurethane hard segment composition Weight percentage (%) of isocyanate functional group content before curing reaction water contact angle Maximum range of color rendering viewing angles horizontal direction vertical direction Example 1 Solvent-free polyurethane 12.11 3.63 <10º 170º 170º Example 2 11.02 2.72 <10º 170º 170º Example 3 15.24 3.81 <10º 170º 170º Example 4 12.21 4.21 <10º 170º 170º Example 5 19.95 3.03 <10º 170º 170º Example 6 11.94 5.09 <10º 170º 170º Example 7 21.95 5.51 <30º 170º 170º Example 8 20.40 3.18 <30º 170º 170º Example 9 20.40 3.26 <30º 170º 170º Example 10 20.50 3.52 <30º 170º 170º Example 11 18.30 3.04 <30º 170º 170º Example 12 18.78 4.50 <30º 170º 170º Example 13 21.91 5.40 <60º 170º 170º Example 14 24.91 2.74 <60º 170º 170º Example 15 24.97 5.85 <60º 170º 170º Example 16 32.80 5.98 <60º 170º 170º Example 17 39.59 0 <60º 170º 170º Example 18 11.18 0 <60º 170º 170º Comparative example 1 Solvent-free polyurethane 50.44 7.63 >60º Unable to develop color Comparative example 2 8.16 2.57 >60º Unable to develop color Comparative example 3 Solvent-based polyurethane 42.75 0 >60º Unable to develop color Comparative example 4 8.14 0 >60º Unable to develop color Comparative example 5 water-based polyurethane 30.36 0 >60º Unable to develop color Comparative example 6 Solvent-free polyurethane 4.45 1.22 <30º The color can develop before washing with water, but cannot develop after washing with water. Comparative example 7 8.05 1.13

Table 7 - Color development area verified by water washing test and chlorine resistance test Weight percentage (%) of polyurethane hard segment composition Weight percentage (%) of isocyanate functional group content before curing reaction Color area % Washing resistance test Chlorine resistance test Before washing Washed 20 times 0hr Sodium hypochlorite aqueous solution (chlorine concentration 100ppm) after static soaking for 168 hours Example 7 21.95 5.51 40% 40% 40% 40% Example 8 20.40 3.18 40% 40% 40% 40% Example 9 20.40 3.26 40% 40% 40% 40% Example 10 20.50 3.52 40% 40% 40% 40% Example 11 18.30 3.04 40% 40% 40% 40% Example 12 18.78 4.50 40% 40% 40% 40% Comparative example 6 4.45 1.22 40% Unable to develop color 40% Unable to develop color Comparative example 7 8.05 1.13 40% Unable to develop color 40% Unable to develop color

Finally, please refer to Figures 9A, 9B, 10A, 10B, 10C, 10D, and 10E. Figure 9A is a top-view photo of one embodiment of the visual color changing fabric of the present disclosure before absorbing moisture, and Figure 9B Figure 10A is a side view of one embodiment of the visual color changing fabric of the present disclosure after absorbing moisture. Figure 10A is a side view of one embodiment of the visual color changing fabric of the present disclosure before absorbing moisture. Perspective photos. Figure 10B is a side view photo of one embodiment of the visual color changing fabric of the present disclosure after absorbing moisture. Figure 10C is a top view photo of one embodiment of the visual color changing fabric of the present disclosure with the fabric body lying flat. Figure 10D is a photo of an embodiment of the visual color changing fabric of the present disclosure with the cloth body lying flat, wherein the cloth body is placed slightly tilted. Figure 10E is a side view of an embodiment of the visual color changing fabric of the present disclosure with the fabric body lying flat.

In this embodiment, the folding portion 410 and the base portion 420 of the visual color changing fabric 400 are woven with yarns of different colors respectively. Specifically, the folding portion 410 of the surface layer is made of purple yarn. Weaved, and the base portion 420 of the bottom layer is woven from blue yarn, and the hydrophilic resin layer printed on the surface of the folding portion 410 can be a transparent color or the same as the folding portion 410 or Different colors are explained in this embodiment by taking a transparent hydrophilic resin layer as an example.

It can be seen from Figures 9A and 10A that after the visual color changing fabric 400 absorbs moisture, the purple folding portion 410 will curl to expose the blue base portion 420 below. It can be confirmed from Figures 9B and 10B that before the visual color change fabric 400 absorbs moisture, the folding portion 410 will be substantially flat against the base portion 420, and when the visual color change fabric 400 absorbs moisture, After being vaporized, the folding portion 410 will curl to expose the base portion 420 .

It can be known from the photos in Figures 10C, 10D, and 10E that when the visual color changes after the fabric 400 absorbs water vapor, whether it is from a flat top view, a slightly tilted top view, or a flat From a side view, one can clearly observe the phenomenon of the base color being exposed and the visual color changing of the fabric 400 changing the visual effect.

Next, refer to Figures 11A to 11D. Figure 11A is a top view photo of another embodiment of the visual color changing fabric of the present disclosure before absorbing moisture. Figures 11B, 11C, and 11D are visual views of the present disclosure. A top-view photo of another embodiment of the color-changing fabric after absorbing moisture, in which the visual color-changing fabric is laid flat.

In other embodiments, the aforementioned hydrophilic resin can also be applied to a visual color-changing fabric with only a base portion, as shown in Figures 12A and 12B, where Figure 12A shows the visual color-changing fabric of the present disclosure. A top-view photo of another embodiment of the fabric before absorbing water vapor. Figure 12B is a top-view photo of another embodiment of the fabric with visual color change of the present disclosure after absorbing water vapor, in which the visual color changes. The fabric lays flat.

Similarly, the hydrophilic resin layer 630 must include 11 to 40 weight percent of polyurethane hard segments, and the hydrophilic resin in the hydrophilic resin layer 630 has no more than 6 weight percent (including 0 to 6 weight percent) of isocyanate before the curing reaction. Functional groups, and the water contact angle of the hydrophilic resin layer 630 is less than 60 degrees can achieve the visual change effect intended to be achieved by the present disclosure and can pass the water washing resistance and chlorine resistance test specifications.

In summary, the present disclosure provides a visual color changing fabric coated with a hydrophilic resin layer on the fabric, which can have good visual changing effects at both vertical color viewing angles and horizontal color viewing angles, and can Passes washability and chlorine resistance test specifications. Compared with existing technologies, such as the US16/275,593 application and the TW202002829A application, the present disclosure provides a completely different operating mechanism, and can solve the problem that the existing technology is limited by the degree of flap warping, which makes the visual change effect insignificant and the color development visible. Disadvantages such as limited angles. Furthermore, the disclosed visual color-changing fabric can pass the washing resistance and chlorine resistance test specifications and is suitable for application in different textile fields.

Although the present disclosure has been disclosed above in terms of embodiments, they are not intended to limit the disclosure. Anyone skilled in the art can make various modifications and modifications without departing from the spirit and scope of the disclosure. Therefore, the protection of the disclosure is The scope shall be determined by the appended patent application scope.

20:Grey cloth 100: Visual color changes the fabric 110:Basal part 112:First yarn 120:Scenery Department 122:Second yarn 124: External page 126:Inner page 130:Connection Department 140: Hydrophilic resin layer 200: Visual color changes the fabric 210: Basal part 212:First yarn 220:Scenery Department 222:Second yarn 224: External page 226:Inner page 230: Hydrophilic resin layer 300: Visual color changes the fabric 310:Scenery Department 320: Hydrophilic resin layer 400: Visual color changes the weave 410:Scenery Department 420:Basal part 500: Visual color changes the fabric 510:Scenery Department 520: Basal part 600: Visual color changes the fabric 610: Basal part 620: Printed coating 630: Hydrophilic resin layer

In order to make the purpose, features, advantages and embodiments of the present disclosure more obvious and understandable, the detailed description of the attached drawings is as follows: Figure 1, Figure 2A and Figure 2B are respectively partial side views of one embodiment of the visual color changing fabric of the present disclosure in different states. Figures 3 and 4 are partial side views of different embodiments of the visual color changing fabric of the present disclosure. Figures 5 to 7 are partial schematic diagrams of another embodiment of the disclosed visual color changing fabric at different manufacturing stages. Figures 8A to 8H are partial top views of different embodiments of the visual color changing fabric of the present disclosure. Figure 9A is a top view photo of one embodiment of the visual color changing fabric of the present disclosure before absorbing moisture. Figure 9B is a top view photo of one embodiment of the visual color changing fabric of the present disclosure after absorbing moisture. Figure 10A is a side view photo of one embodiment of the visual color changing fabric of the present disclosure before absorbing moisture. Figure 10B is a side view photo of one embodiment of the visual color changing fabric of the present disclosure after absorbing moisture. Figure 10C is a top view photo of one embodiment of the visual color changing fabric of the present disclosure with the fabric body lying flat. Figure 10D is a photo of an embodiment of the visual color changing fabric of the present disclosure with the cloth body lying flat, wherein the cloth body is placed slightly tilted. Figure 10E is a side view of an embodiment of the visual color changing fabric of the present disclosure with the fabric body lying flat. Figure 11A is a top view photo of another embodiment of the visual color changing fabric of the present disclosure before absorbing moisture. Figures 11B, 11C, and 11D are photos from a top view of another embodiment of the visual color changing fabric of the present disclosure after absorbing moisture. Figure 12A is a top view photo of another embodiment of the visual color changing fabric of the present disclosure before absorbing moisture. Figure 12B is a top view photo of another embodiment of the visual color changing fabric of the present disclosure after absorbing moisture.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

100: Visual color changes the fabric

110:Basal part

120:Scenery Department

130:Connection Department

140: Hydrophilic resin layer

Claims (18)

A visual color-changing woven fabric includes: a base portion woven from a first yarn; a folding portion woven from a second yarn; the base portion and the folding portion are connected by A connecting portion can be hingedly joined, wherein the folding portion at least partially covers the base portion; and a hydrophilic resin layer is disposed on the folding portion, wherein the water contact angle of the hydrophilic resin layer is not greater than 60 degrees. , wherein the base portion has a first color, the folding portion has a second color, and the first color is different from the second color. After the visual color change fabric is washed for 20 times and tested, the visual change is obvious. The color area is not less than 2%. A kind of visual color changing fabric, including: a base part woven from a first yarn; a folding part woven from a second yarn, the folding part and the base part are made of the same embryo The cloth is hot-pressed, and the folding part and the base part are retractable and can be joined without a connecting part; and a hydrophilic resin layer is provided on the folding part, wherein the water content of the hydrophilic resin layer The contact angle is not greater than 60 degrees, wherein the first yarn has a first color, and the second yarn has a second color, and the first color is different from the second color, and the visual color changes the fabric After 20 times of water washing, the visual change in color area is not less than 2%. The visual color changing fabric as described in claim 1 or 2, wherein the folding portion includes an outer page and an inner page connected, the inner page faces the base portion, and the hydrophilic resin layer is coated on the outer page superior. The visual color changing fabric as described in claim 1 or 2, wherein the folding portion includes an outer page and an inner page connected, the inner page faces the base portion, and the hydrophilic resin layer is coated on the inner page superior. The visual color changing fabric as described in claim 1 or 2, wherein the folding portion includes an outer page and an inner page connected, the inner page faces the base portion, and the hydrophilic resin layer is coated on the inner page with that outside page. The visual color changing fabric of claim 1 or 2, wherein the folding portion completely covers the base portion. The visual color changing fabric according to claim 1 or 2, wherein the base portion is partially exposed from the folding portion. The visual color changing fabric as described in claim 1 or 2, wherein the horizontal color rendering viewing angle of the visual color changing fabric can reach 170 degrees. A visually color-changing fabric as described in claim 1 or 2, Among them, the visual color changes the vertical color rendering of the fabric and the viewing angle can reach 120 degrees. The visual color changing fabric according to claim 1 or 2, wherein the coverage rate of the hydrophilic resin layer in the folding portion is 10% to 99%. The visual color changing fabric as claimed in claim 1 or 2, wherein the pattern of the hydrophilic resin layer is a continuous pattern. The visual color changing fabric as described in claim 1 or 2, wherein the pattern of the hydrophilic resin layer is a solid or hollow discontinuous pattern, and the discontinuous pattern is dotted, linear, striped, square, Circles, ovals, polygons, irregular shapes, or combinations thereof. The visual color changing fabric of claim 1 or 2, wherein the hydrophilic resin layer has a third color, and the first color is different from the third color. The visual color changing fabric of claim 1 or 2, wherein the hydrophilic resin layer has a third color, and the second color is different from the third color. The visual color-changing fabric according to claim 1 or 2, wherein the resin of the hydrophilic resin layer includes polyurethane resin, and the hard segment content of the polyurethane resin accounts for 11 to 40% by weight of the total composition. Weight percent. The visual color-changing fabric as claimed in claim 1 or 2, wherein the resin of the hydrophilic resin layer includes a polyurethane resin with an isocyanate functional group, wherein the isocyanate functional group has a content of no more than 6 weight percent before curing reaction. , including 0~6 weight percent. The visual color-changing fabric as described in claim 1 or 2, wherein the color-developing area of the visual color-changing fabric can reach 2% to 40% after being washed and tested 20 times. The visual color-changing fabric as described in claim 1 or 2, wherein the color-developing area of the visual color-changing fabric can reach 2% to 40% after passing the AATCC 162-2002 chlorine swimming water fastness test.

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