CN116949621A

CN116949621A - Controllable color-changing yarn

Info

Publication number: CN116949621A
Application number: CN202210407596.1A
Authority: CN
Inventors: 丁川
Original assignee: Hongzhi Shanghai Technology Co ltd
Current assignee: Hongzhi Shanghai Technology Co ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2023-10-27

Abstract

The invention discloses a controllable color-changing yarn, which comprises a conductive yarn and a thermosensitive color-changing yarn, wherein the conductive yarn and the thermosensitive color-changing yarn are arranged in a wrapping, cladding and stranding way, the thermosensitive color-changing yarn is arranged as a filament yarn or a short fiber yarn, and the transverse width of the conductive yarn is set to be 0.01-3mm. The controllable color-changing yarn can be prepared by utilizing the existing textile equipment in a rapid and continuous manner, and has the advantages of convenient raw material source, low cost, small fiber diameter, convenience in subsequent processing, high firmness of a color-changing layer and good durability.

Description

Controllable color-changing yarn

Technical Field

The invention relates to the field of textiles, in particular to a controllable color-changing yarn.

Background

In order to achieve controlled discoloration of textile fabrics, one typically first prepares a fiber or yarn of controlled discoloration and then weaves the fabric from the fiber or yarn. In general, there are two methods to achieve electrically controllable discoloration of fibers or yarns.

One is to control the electrochromic layer therein to change color by preparing the fiber with an electric field disposed along the fiber axis. For example, CN 108873539B discloses an electrochromic fiber, its preparation and application, which adopts a metal wire as an electrode, and a viologen electrochromic electrolyte solution is coated on the surface of the metal wire through fiber continuous construction equipment. CN110609427a discloses a fiber electrochromic device with a winding structure, which sequentially comprises insulating fibers, at least two conductive fibers, an electrolyte layer and an insulating encapsulation layer from inside to outside, wherein the conductive fibers are not in contact with each other and spirally wound on the surface of the insulating fibers in parallel, and the surface of at least one conductive fiber is covered with an electrochromic film.

Secondly, the heat sensitive material is covered around the conductive yarn, and when the conductive yarn is electrified and heated, the heat sensitive material changes color, so that the controllable color change of the fiber or the yarn is realized. For example, CN 107475840B discloses a stretchable electrothermal electrochromic fiber, which uses a core spun yarn as an elastic matrix, and sequentially prepares a conductive layer, a protective layer and a color-changing layer on the surface of the elastic matrix; the obtained stretchable thermochromic fiber can realize various color changes. CN 111527243A discloses a fiber with a conductive core and a color-changing coating, comprising a conductive core and a coating disposed around and along said conductive core, the coating comprising a layer of a polymeric material with a color-changing pigment. CN 110205688B discloses an electrothermal electrochromic fiber, which comprises a composite material with a three-layer structure, wherein a protective layer, a thermochromic layer and a conductive layer are sequentially arranged from outside to inside, the conductive layer material heats under the condition of electrification, and the thermochromic layer material of the middle layer plays a color-changing function under the thermal action of the conductive layer. CN110219082a adopts the method of electrostatic spinning core spun yarn to cover the nano fiber with temperature-changing ink on the surface layer of the conductive yarn, when in use, voltage is applied to two ends of the manufactured yarn, and the color conversion of the yarn can be controlled by controlling the voltage. CN112813554a discloses an electrically controlled color-changing silk composite yarn with a skin-core structure, wherein a core layer is made of fibers which can generate heat when electrified, and a skin layer is made of thermochromic silk fibers. CN111676545a invented a thermochromic bionic color-changing fiber, which is composed of conductive wire and thermochromic bionic color-changing layer containing thermochromic material. CN112522809a discloses a skin-core structure elastic electrically-driven thermochromic sensing fiber and a preparation method thereof. The core layer is made of conductive polyurethane fibers coated with graphene, and polyurethane nanofibers containing different thermochromic inks are electrospun onto the surface of the core layer to form a skin layer.

However, the method has the defect of no small, such as forming a uniform electric field along the axial direction of the fiber, having higher difficulty and having higher control difficulty in industrialized continuous production; electrochromic materials are expensive; it is often necessary to apply a protective layer; the fiber diameter is larger, and the subsequent textile processing is difficult.

In addition, the thermochromic material refers to a material which can sense the change of the external environment temperature and simultaneously change the own color, wherein the color change is accompanied with the change of the own physical structure or chemical structure, and the change of the material structure leads to the conversion of the spectral property, thereby showing the macroscopic color change. There are many thermochromic yarns and fiber products commercially available today that have a color transition temperature below which one color appears and which transition to another color as the temperature gradually increases above the temperature by coating, co-spinning, etc.; and then to the original color when the temperature drops below the transition temperature.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical problems to be solved by the invention are that the existing color-changing yarn has large technological difficulty, continuous production cannot be realized, the price of electrochromic materials is high, a protective layer needs to be coated, the diameter of the obtained fiber is large, and the subsequent textile processing is difficult. The invention provides a controllable color-changing yarn, which can be prepared by using the existing textile equipment in a rapid and continuous way, and has the advantages of convenient raw material source, low cost, small fiber diameter, convenient subsequent processing, high firmness of a color-changing layer and good durability.

In order to achieve the above purpose, the invention provides a controllable color-changing yarn, which comprises a conductive yarn and a thermosensitive color-changing yarn, wherein the conductive yarn and the thermosensitive color-changing yarn are mixed and wound, the conductive yarn is arranged as a filament yarn, the thermosensitive color-changing yarn is arranged as a filament yarn or a short fiber yarn, and the transverse width of the conductive yarn is set to be 0.01-3mm.

Further, the conductive yarn is configured to be made using one or more of a metal, a metal-plated polymer, a conductive polymer, a polymer comprising or covering a metal, a conductive polymer, a nanocarbon material, and a liquid metal polymer composite.

Further, the conductive yarn is provided as a monofilament.

Further, the conductive yarn is provided as multifilament yarn.

Further, the thermochromic yarn is configured to include one or more colors of thermochromic fibers.

Further, the thermochromic yarn is configured to include one or more thermochromic fibers having a color changing temperature.

Further, the mixed winding core-spun, cladding and stranding arrangement specifically comprises cladding yarns, core-spun yarns and stranding yarns.

Further, the covering yarn is formed by using the conductive yarn as a core yarn, and the thermochromic yarn is spirally covered outside the conductive yarn along the same direction.

Further, the core spun yarn is provided with filaments as cores, and short fibers are used for wrapping the filaments in the same direction in a spiral manner.

Further, the twisted yarns are formed by twisting filament yarns in a spiral manner.

Further, the conductive yarn includes one or more strands, and the lateral width of the thermochromic yarn is not less than the total lateral width of the conductive yarn.

Further, the covered yarn includes a single covered yarn and a double covered yarn, and the lateral width of the thermochromic yarn in the single covered yarn is not smaller than the lateral width of the conductive yarn.

Further, the double-covered yarn includes a first thermochromic yarn and a second thermochromic yarn, and wrapping directions of the first thermochromic yarn and the second thermochromic yarn are set to be opposite.

Further, the thermochromic yarn is provided as a monofilament.

Further, the thermochromic yarn is provided as multifilament yarn.

Further, the thermochromic yarn is formed by twisting two or more filaments.

Further, the thermochromic yarn is formed by twisting two or more than two monofilaments.

Further, when the number of strands of the thermochromic yarn is greater than 2 and is double, the thermochromic yarn includes a multifilament obtained by twisting in combination and a multifilament obtained by twisting in pairs and then twisting in combination.

Further, the first thermochromic yarn includes monofilaments and multifilaments, the second thermochromic yarn includes monofilaments and multifilaments, and the first thermochromic yarn and the second thermochromic yarn are arranged to use the same or different yarns.

Technical effects

The controllable color-changing yarn provided by the invention has the advantages that the original source is convenient and quick, the cost is low, the processing of the controllable color-changing yarn can be finished by utilizing the existing textile equipment, the processing technology is mature, the cost is low, the controllable color-changing yarn is convenient for subsequent textile processing, and the color-changing layer has high fastness and good durability. The controllable color-changing yarn provided by the invention is heated by electrifying, can be heated to change the color, and can change back to the original color after being powered off and cooled, so that the color can be conveniently and controllably changed, meanwhile, the yarn with various colors and color-changing effects can be obtained by coating the thermosensitive color-changing fibers with different colors and different color-changing temperatures, and the textile with rich color effects can be designed and manufactured.

The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.

Drawings

FIG. 1 is a schematic representation of a controlled color change yarn of example 1 of the present invention;

FIG. 2 is a schematic representation of a controlled color change yarn of example 2 of the present invention;

FIG. 3 is a schematic representation of a controlled color change yarn of example 3 of the present invention;

FIG. 4 is a schematic representation of a controlled color change yarn of example 4 of the present invention;

FIG. 5 is a schematic representation of a controlled color change yarn of example 5 of the present invention;

FIG. 6 is a schematic representation of a controlled color change yarn of example 6 of the present invention;

FIG. 7 is a schematic representation of a controlled color change yarn of example 7 of the present invention;

FIG. 8 is a schematic representation of a controlled color change yarn of example 8 of the present invention;

FIG. 9 is a schematic representation of a controlled color change yarn of example 9 of the present invention;

FIG. 10 is a schematic representation of a controlled color change yarn of example 10 of the present invention;

FIG. 11 is a schematic representation of a controlled color change yarn of example 11 of the present invention;

fig. 12 is a schematic representation of a controlled color change yarn of example 12 of the present invention.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular internal procedures, techniques, etc. in order to provide a thorough understanding of embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

The embodiment of the invention provides a controllable color-changing yarn, which comprises a conductive yarn and a thermosensitive color-changing yarn, wherein the conductive yarn and the thermosensitive color-changing yarn are mixed and wound, and the conductive yarn is arranged as a filament yarn, and can be a monofilament or a multifilament. The thermochromic yarn is a filament yarn or a staple yarn, specifically, a yarn composed of filaments or multifilaments, or a staple yarn formed by spinning staple fibers. The transverse width of the conductive yarn is set to 0.0.1-3mm. Wherein the hybrid winding comprises core wrapping, cladding and stranding.

By filament yarn is meant that the fibres making up the yarn are continuous filaments, such as commonly known silk filaments, and also various types of chemical fibre (like polyester, nylon) filaments.

Staple yarn means that the fibers constituting the yarn are discontinuous and have a relatively short length, and for example, a generally known staple fiber having a length of 38 to 42 mm and a sheep wool having a length of 50 to 70 mm may be used as staple fibers such as wool and cotton by cutting continuous chemical fiber filaments.

Wherein the conductive yarn is configured to be made using one or more of a metal, a metal-plated polymer, a conductive polymer, a polymer comprising or covering a metal, a conductive polymer, a nanocarbon, and a liquid metal polymer composite.

The thermochromic yarn is configured to include thermochromic fibers of one or more colors or color changing temperatures.

The invention provides a controllable color-changing yarn which mainly comprises a covering yarn and a covering yarn. Wherein, the cladding yarn is set to take the conductive yarn as the core yarn, and the thermochromic yarn is wrapped outside the conductive yarn along the same direction in a spiral manner. The core spun yarn is made of filaments as the core, and short fibers are used for wrapping the filaments in the same direction in a spiral mode. The twisted yarn is formed by twisting filament yarns in pairs to form a spiral yarn conductive yarn comprising one or more strands, and the transverse width of the thermochromic yarn is not less than the total transverse width of the conductive yarn.

The covering yarn comprises a single covering yarn and a double covering yarn, and the transverse width of the thermochromic yarn in the single covering yarn is not smaller than that of the conductive yarn. The double-coated yarn comprises a first thermosensitive color-changing yarn and a second thermosensitive color-changing yarn, wherein the wrapping directions of the first thermosensitive color-changing yarn and the second thermosensitive color-changing yarn are opposite, namely the winding directions of the two yarns are opposite, and a three-layer structure from inside to outside is formed. The single-covered yarn is woven by a single-covered hollow spindle covered spinning machine, and the specific production process is as follows:

1. unwinding the core wire: the bobbin filled with the conductive yarn is unwound under the friction drive of the feeding roller;

2. wrapping: the conductive yarn unwound in the step 1 passes through a central tube of a lower hollow spindle by bypassing a godet, and meets an outer wrapping yarn formed by thermochromic fiber yarn which is inserted into the hollow spindle and rotates together with the hollow spindle on a lower yarn guiding hook, and the outer wrapping yarn wraps the conductive core yarn along with the high-speed rotation of the hollow spindle;

3. winding and forming: the wrap yarn formed in step 2 is drawn out by a yarn drawing roller and wound onto a bobbin by a winding device.

In the process, the core yarn is pre-applied with a certain tension of 0-10cN, the rotating speed of the hollow spindle is 2000-8000r/min, and the crimping rate is more than 95%.

The double-covered yarn is woven by a double-covered hollow spindle covered spinning machine, and the double-covered hollow spindle comprises a lower hollow spindle and an upper hollow spindle which are opposite in rotation direction, and the specific processing process is as follows:

1 core wire unwinding: the bobbin filled with the conductive yarn is unwound under the friction drive of the feeding roller;

2 first forward wrapping: the conductive yarn unwound in the step 1 passes through a central tube of a lower hollow spindle by bypassing a godet, and meets a first outer wrapping yarn which is formed by thermosensitive spot-color fiber yarn and is unwound from an aluminum spindle tube inserted in the lower hollow spindle and rotated together with the lower hollow spindle at a lower yarn guiding hook, wherein the first outer wrapping yarn wraps the conductive yarn along with the high-speed rotation of the lower hollow spindle;

3 second reverse wrapping: continuously passing the wrapping yarn subjected to the first forward wrapping through a central tube of an upper hollow spindle, and converging the wrapping yarn with a second outer wrapping yarn formed by thermochromic fiber yarns on an upper hollow spindle aluminum spindle tube at an upper yarn guide hook, wherein the second outer wrapping yarn is reversely wrapped on the wrapping yarn in the step 2 along with the high-speed rotation of the upper hollow spindle (the first wrapping yarn and the second wrapping yarn can be the same type of yarn or different types of yarn);

4, winding and forming: the wrap yarn formed in step 3 is drawn out by a yarn drawing roller and wound onto a bobbin by a winding device.

The core-spun yarn is a pattern yarn which takes filaments as the core and wraps short fibers. Can be produced by ring spinning frame, hollow spindle fancy yarn twisting machine, friction spinning machine, jet spinning machine, rotor spinning machine and other equipment. The conductive core yarn is fed from a collector behind a front roller jaw without passing through a drafting mechanism of the spinning frame, is combined with the drafted thermochromic fiber staple fiber strips, is output by the front roller jaw, and is twisted to form the core spun yarn.

The first thermochromic yarn includes monofilaments and multifilaments, the second thermochromic yarn includes monofilaments and multifilaments, and the first thermochromic yarn and the second thermochromic yarn are arranged to use the same or different yarns.

The thermochromic yarn is provided as a monofilament or multifilament yarn. The multifilament is formed by twisting two or more filaments, in particular, twisting.

When the number of strands of the thermochromic yarn is greater than 2 and is double, the thermochromic yarn comprises multifilament formed by mixing and twisting and multifilament formed by mixing and twisting after twisting two by two.

The thermochromic yarn is prepared by mixing a thermosensitive material into a yarn raw material, and producing various synthetic and regenerated fibers through spinning, or by coating the surfaces of natural, synthetic and regenerated fibers with the thermosensitive material.

The preparation method of the thermochromic fiber of the controllable color-changing yarn provided by the invention comprises the following steps:

1. the main process of the blending method is as follows: and (3) slicing the dried resin, adding the resin slices and the thermochromic pigment powder into a screw extruder, carrying out melt blending at a certain temperature and a certain rotating speed, adopting a certain spinning speed for spinning, cooling, oiling, stretching and winding to obtain thermochromic fiber filaments, and cutting the filaments to obtain the thermochromic fiber staple fibers. The thermochromic fiber used for the controllable color-changing yarn is mainly prepared by adopting the method.

2. The coating method mainly comprises the following steps: firstly preparing slurry containing temperature-variable pigment, adhesive and auxiliary agent according to a formula, then coating the slurry on the yarn by means of blade coating, padding and the like, and obtaining the thermosensitive color-variable yarn after pre-baking and baking.

A controlled color change yarn of the present invention will be described with specific examples.

Example 1:

as shown in fig. 1, a schematic view of a covered yarn is shown. The yarn is made by a single cladding process, wherein 11 is a conductive yarn and 21 is a thermochromic yarn. In this embodiment, the conductive yarn 11 is made of a single conductive material, and may be a conductive yarn made of liquid metal, an elastic monofilament modified by conductive carbon material, or a metal monofilament. The conductive yarn made of liquid metal and the conductive carbon material modified elastic monofilament have good elasticity and good stretching recovery performance. The flexible color-changing yarns prepared by using the two types of yarns are suitable for preparing fabrics with good elasticity. The metal monofilament has the main advantages of relatively simple manufacture and low cost.

The outer coating is monofilament and multifilament of thermochromic fiber. Generally, the lateral width of the thermochromic yarn 21 is not smaller than the lateral width of the conductive yarn 11, so that the outer layer of thermochromic yarn can better cover the inner layer of conductive yarn.

Example 2:

as shown in fig. 2, a schematic representation of a covered yarn is provided. The yarn is prepared by a single coating method, wherein 12 is conductive yarn and 21 is thermochromic yarn. The conductive yarn 12 in this embodiment is a doubled conductive material, such as a conductive yarn made of a liquid metal, a twisted yarn of two wires, or the like. The outer coating is monofilament and multifilament of the thermosensitive color-changing fiber. The cost of the two-wire ply yarn is lower than that of the metal multifilament yarn, and the product cost is low. As in the previous embodiment, the lateral width of the thermochromic yarn 21 is not smaller than the lateral width of the conductive yarn 11, so that the outer layer of thermochromic yarn can better cover the inner layer of conductive yarn.

Example 3:

as shown in fig. 3, a schematic representation of a covered yarn is provided. The yarn is prepared by adopting a single coating method, wherein 13 is conductive yarn and 21 is thermochromic yarn. The 13 conductive yarns are formed by conductive fiber multifilament yarns, and have certain twist, and the number of the multifilament yarns can be a plurality of multifilament yarns. Typically, there are metallized polymer yarns, yarns made of metal multifilament yarns, such as 70D silver plated nylon yarns and stainless steel yarns KTFB 100/1. The silver-plated nylon yarn has the advantages of good product processability and convenient source, and is particularly beneficial to the development of subsequent fabrics. The overwrap 21 is a monofilament or multifilament yarn of thermochromic fiber. Likewise, the lateral width of thermochromic yarn 21 is not smaller than the lateral width of conductive yarn 13, so that the outer layer of thermosensitive yarn can better cover the inner layer of conductive yarn.

Example 4:

as shown in fig. 4, a schematic representation of a covered yarn is provided. The double coating method is adopted, wherein 11 is conductive yarn, and 21 and 22 are thermochromic yarn. Compared with single-coated yarns, the double-coated yarns have better covering effect, namely, the outer layer two-layer coated yarns can ensure that the conductive yarns of the core layer are not exposed. Considering that the conductive yarn is generally black or dark gray and does not have a color-changing effect, the method has important significance for ensuring the covering of the core conductive yarn by the overcoated thermosensitive color-changing yarn. The conductive yarn in this embodiment is a single piece of conductive material, such as a conductive yarn made of a liquid metal, a metal monofilament, or the like. The outer coating is monofilament and multifilament of the thermochromic fiber, the twist directions are opposite when the monofilament and multifilament are wrapped, namely when the thermochromic yarn 21 is S-twisted, the thermochromic yarn 22 is Z-twisted; when the thermochromic yarn 21 is Z-twisted, the thermochromic yarn 22 is S-twisted. Meanwhile, the coating coefficients of the inner coating yarn and the outer coating yarn can be controlled, so that the coating coefficient of the inner coating yarn is higher than 95%, and the coating coefficient of the outer coating yarn is lower than the value. Thus, the display effect of intermittently displaying the inner and outer layer cladding yarns can be obtained.

Example 5

As shown in fig. 5, a schematic view of a covered yarn is shown. The double coating method is adopted, wherein 12 is conductive yarn, and 21 and 22 are thermochromic yarn. The conductive yarn 12 in this embodiment is a doubled conductive material, such as a conductive yarn made of a liquid metal, a twisted yarn of two wires, or the like. The outer coating is monofilament and multifilament of the thermochromic fiber, the twist directions are opposite when the monofilament and multifilament are wrapped, namely when the thermochromic yarn 21 is S-twisted, the thermochromic yarn 22 is Z-twisted; when the thermochromic yarn 21 is Z-twisted, the thermochromic yarn 22 is S-twisted. Meanwhile, the coating coefficients of the inner coating yarn and the outer coating yarn can be controlled, so that the coating coefficient of the inner coating yarn is higher than 95%, and the coating coefficient of the outer coating yarn is lower than 95%, and the display effect of intermittently displaying the inner coating yarn and the outer coating yarn is obtained.

Example 6

As shown in fig. 6, a schematic view of a covered yarn is shown. The double coating method is adopted, wherein 13 is conductive yarn, and 21 and 22 are thermochromic yarn. The 13 conductive yarn is made of conductive fiber multifilament yarn, which has a certain twist, and the number of multifilament yarn can be several, for example, a metal-coated polymer yarn or a yarn made of metal multifilament yarn. The outer coating is monofilament and multifilament of the thermochromic fiber, the twist directions are opposite when the monofilament and multifilament are wrapped, namely when the thermochromic yarn 21 is S-twisted, the thermochromic yarn 22 is Z-twisted; when the thermochromic yarn 21 is Z-twisted, the thermochromic yarn 22 is S-twisted, and meanwhile, the coating coefficients of the inner coating yarn and the outer coating yarn can be controlled to be higher than 95%, and the coating coefficient of the outer coating yarn is lower than 95%, so that the display effect of intermittently displaying the inner coating yarn and the outer coating yarn is obtained.

Examples 7 to 9:

as shown in fig. 7-9, a schematic representation of a covered yarn is provided. The yarn is prepared by a single cladding method, wherein 11-13 are conductive yarns and 23 are thermochromic yarns. The conductive yarn in this embodiment is a single conductive material, such as a conductive yarn made of a liquid metal, a metal monofilament, or the like. The conductive yarn 12 in this embodiment is a doubled conductive material, such as a conductive yarn made of a liquid metal, a twisted yarn of two wires, or the like. The conductive yarn 13 in this embodiment is made of conductive fiber multifilament yarn, and has a certain twist, and the number of multifilament yarns may be several. For example, there are metal-plated polymer yarns and yarns composed of metal multifilament yarns. To obtain more color effects, two different colored, or differently colored temperature yarns may be plied in advance to form an over-wrapped thermochromic fiber multifilament yarn 23.

Examples 10 to 12:

as shown in fig. 10-12, a schematic representation of a covered yarn is provided. The yarn is made by a double coating process wherein 11-13 are conductive yarns and 24 and 25 are thermochromic yarns. The conductive yarn 11 in this embodiment is a single conductive material, such as a conductive yarn made of a liquid metal, a metal monofilament, or the like. The conductive yarn 12 in this embodiment is a doubled conductive material, for example, a conductive yarn made of a liquid metal, a twisted yarn of two wires, or the like. The conductive yarn 13 in this embodiment is made of conductive fiber multifilament yarn, and has a certain twist, and the number of multifilament yarns may be several, for example, a metal-plated polymer yarn, a yarn made of metal multifilament yarn. In order to obtain more color effects, yarns with two different colors, different color changing effects or different color changing temperatures can be folded in advance to form multifilament with the outer coating of the thermochromic fibers. Meanwhile, the coating coefficients of the inner coating yarn and the outer coating yarn can be controlled, so that the coating coefficient of the inner coating yarn is higher than 95%, and the coating coefficient of the outer coating yarn is lower than 95%, and the display effect of intermittently displaying the inner coating yarn and the outer coating yarn is obtained.

The controllable color-changing yarn provided by the embodiment of the invention can be spun by using the existing spinning equipment without independently developing new yarn-weaving equipment, and the finished product of the controllable color-changing yarn can be woven and bent and can be woven as common yarn for subsequent weaving. Meanwhile, when developing a controllable color-changing yarn according to the embodiment of the invention, not only the problem of the yarn itself needs to be solved, but also the controllable color-changing yarn needs to be considered to form controllable circuit arrangement on the textile, for example, how to form specific circuits on the fabric, so as to achieve the designed visual effect. An important step in the method for manufacturing a circuit by using the conductive yarn introduction method as in the embodiment of the invention is to find the conductive yarns suitable for weaving, and the conductive yarns have no influence on the human body and the fabric structure. The controllable color-changing yarn provided by the embodiment of the invention has good conductivity and also has the advantages of good weaving and bending, the controllable color-changing yarn takes the conductive yarn as the core yarn, the outer layer is coated with non-conductive thermosensitive color-changing fibers or yarns, and the fibers coated with the outer layer can well protect the conductive fibers, so that the effects of reducing yarn abrasion and insulation are achieved. The working voltage of the controllable color-changing yarn provided by the embodiment of the invention can be lower than 9V, the yarn is heated to a certain temperature after being electrified and heated, the color of the thermosensitive color-changing fiber yarn coated on the outer layer is changed (fibers with different color-changing temperatures are selected, and the typical range is 28-41 ℃), so that the yarn has no safety risk to a human body.

Early methods of forming electrical circuits in fabrics used standard wire and were either sewn or fastened to the fabric surface using rigid materials, which had good conductivity and simple process, but severely reduced the comfort of the fabric. According to the controllable color-changing yarn disclosed by the embodiment of the invention, the conductive yarn is combined with the traditional textile technology to form the flexible circuit, and the conductive yarn is led into the textile structure to form the conductive circuit by adopting methods of weaving, knitting, embroidering and the like. The fabric with the circuit has the characteristics of light weight, good air permeability, softness and comfort of common fabrics, and excellent conductivity. In addition, the diameter of the controllable color-changing yarn provided by the embodiment of the invention is set to be 1-3mm, and the controllable color-changing yarn has flexibility, can be used for subsequent weaving, and has good weaving property. Meanwhile, the outer cladding yarn is spirally wound on the core layer conductive yarn, so that the axial mechanical properties of the finished product, such as strength, modulus, breaking strength and the like, are not changed, and the influence on weaving processing is small; the bending property of the yarn has great influence on the processing property of the yarn, and also because the outer cladding yarn is wound on the core layer conductive yarn in a spiral form, the bending modulus of the finished product is less in change compared with that of the conductive yarn; the surface of the controllable color-changing yarn is coated with the heat-sensitive fiber yarn, so that hairiness and characteristics of the finished product are basically consistent with those of the heat-sensitive fiber yarn, and friction force of the finished product is basically consistent, so that processing is not influenced.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The controllable color-changing yarn is characterized by comprising a conductive yarn and a thermosensitive color-changing yarn, wherein the conductive yarn and the thermosensitive color-changing yarn are mixed and wound, the conductive yarn is arranged to be a filament yarn, the thermosensitive color-changing yarn is arranged to be a filament yarn or a short fiber yarn, and the transverse width of the conductive yarn is set to be 0.01-3mm.

2. A controllable color changing yarn according to claim 1, wherein said conductive yarn is configured to be made using one or more of metal, metal coated polymer, conductive polymer, polymer comprising or coated with metal, conductive polymer, nanocarbon, and liquid metal polymer composite.

3. A controllably variable color yarn according to claim 2, wherein said conductive yarn is provided as a monofilament.

4. A controllably variable color yarn according to claim 2, wherein said conductive yarn is provided as a multifilament yarn.

5. A controllable color changing yarn according to claim 1, wherein said thermochromic yarn is arranged to comprise one or more color thermochromic fibers.

6. A controllable color changing yarn according to claim 1, wherein said thermochromic yarn is configured to comprise one or more color changing temperature thermochromic fibers.

7. A controllable color changing yarn according to claim 1, wherein said hybrid winding comprises a core-spun, cladding, ply-twisted arrangement, in particular comprising a cladding yarn, a core-spun yarn and a ply-twisted yarn.

8. A color-changing controllable yarn according to claim 7, wherein said covering yarn is arranged to cover said conductive yarn as a core yarn, said thermochromic yarn being wrapped around said conductive yarn in the same direction in a spiral manner.

9. A color-changing controllable yarn according to claim 7, wherein said core-spun yarn is provided with filaments as a core, and short fibers are used to cover said filaments in the same direction in a spiral manner.

10. A color controllable yarn as claimed in claim 7, characterized in that the ply yarn is provided as a yarn formed by twisting filament yarns in a spiral pair.

11. The controllably variable color yarn of claim 8, wherein said conductive yarn comprises one or more strands, said thermally variable color yarn having a cross-directional width that is not less than a total cross-directional width of said conductive yarn.

12. The controlled color change yarn of claim 8 wherein said covered yarn comprises a single covered yarn and a double covered yarn, said thermochromic yarn in said single covered yarn having a cross-directional width that is not less than a cross-directional width of said conductive yarn.

13. A color controllable yarn as claimed in claim 12, wherein the double covered yarn comprises a first and a second thermochromic yarn, the wrapping directions of the first and second thermochromic yarns being set opposite.

14. A controllable color changing yarn according to claim 5 wherein said thermochromic yarn is provided as a monofilament.

15. A controllable color changing yarn according to claim 5 wherein said thermochromic yarn is provided as a multifilament yarn.

16. A color-changing controllable yarn according to claim 15, wherein said yarn is formed by plying two or more filaments.

17. A color controllable yarn as claimed in claim 15, wherein the color controllable yarn is twisted from two or more filaments.

18. A color controllable yarn as claimed in claim 17, wherein said yarn has a yarn number of more than 2 and is double, including a multifilament yarn obtained by twisting in combination and a multifilament yarn obtained by twisting in combination after twisting in pairs.

19. A color controllable yarn as claimed in claim 13, wherein the first thermochromic yarn comprises monofilaments and multifilaments and the second thermochromic yarn comprises monofilaments and multifilaments, the first thermochromic yarn and the second thermochromic yarn being arranged to use the same or different yarns.