Fabric authenticity identification fiber and fabric authenticity identification system using same

Abstract

The present invention relates to a fiber for fabric authenticity identification and a fabric authenticity identification system using the same, the fiber for fabric authenticity identification comprising an infrared light-emitting body, the fiber being included in a yarn or a fabric, the fiber having a function of fabric authenticity identification by mixing a special pigment with the fiber, and the fabric authenticity identification system using the same. Therefore, the effect of authenticity identification or counterfeiting prevention can be achieved. For example, for a specific functional product, analysis after fabric preparation becomes complex and infeasible, but rapid and accurate identification can be achieved through the fiber for fabric authenticity identification of the present invention.

Description

Technical Field

[0001] The present invention relates to a fabric authenticity identification fiber and a fabric authenticity identification system using the same, and more particularly, to a fabric authenticity identification fiber that exerts a fabric authenticity identification function by mixing a special additive that releases infrared rays into the fiber and a fabric authenticity identification system using the same. Background Art

[0002] There is known a security fiber for preventing counterfeiting of securities, high value-added products, etc. or for identifying their authenticity. This security fiber is prepared by containing a special substance or dyeing or coating the fiber so that it emits light, changes color, releases fluorescence and phosphorescence, or exerts some characteristics in response to the wavelength of an electromagnetic field or thermal conditions.

[0003] Korean Patent Publication No. 2001-0112666 discloses a technology that provides a function of preventing forgery and tampering by using a fluorescent substance, a phosphorescent substance, and a fluorescent synthetic resin, wherein the fluorescent substance emits light when subjected to an external stimulus, the phosphorescent substance has a different emission wavelength from the fluorescent substance and emits light after the external stimulus is removed, and the fluorescent synthetic resin contains a thermoplastic resin or a thermosetting resin. However, the technology has a problem that the function of preventing forgery is not perfect enough.

[0004] US Patent No. 4,655,788 discloses a method for preparing a security fiber containing a fluorescent substance excited by infrared, visible, or ultraviolet rays, but such a security fiber has the limitation that special equipment is required to determine whether it has been forged or tampered with.

[0005] Compared with ordinary yarn and imported recycled yarn, there is nothing special about Korean recycled yarn. When clothing manufacturers want to use Korean recycled yarn and purchase fabrics from fabric manufacturers, if the fabric manufacturers use ordinary yarn to prepare it, there is a problem that it is difficult to distinguish the authenticity of the product.

[0006] There have been technologies related to security fibers for preventing counterfeiting of securities, high value-added products, etc., but there has not been any technology for identifying the authenticity of yarns or fabrics in the fiber field. Summary of the invention

[0007] Technical issues

[0008] The present invention is used to solve the problems of the prior art as described above. One purpose of the present invention is to provide a fabric authenticity identification fiber that can identify the authenticity of yarn or fabric.

[0009] Another object of the present invention is to provide a method for preparing the fiber for fabric authenticity identification.

[0010] Another object of the present invention is to provide a fabric authenticity identification system using the fibers for fabric authenticity identification.

[0011] Technical solution

[0012] To achieve the above object, an embodiment of the present invention relates to a fiber for fabric authenticity identification, which is composed of a fiber-forming polymer and contains 50 ppm to 1000 ppm of a luminescent body represented by any one of Chemical Formula 1 to Chemical Formula 4. The average particle size of the luminescent body is 0.5 μm or more and less than 5 μm, and the emission wavelength is 800 nm to 2500 nm.

[0013] Chemical Formula 1:

[0014] Y X V Y O3:Sb

[0015] In the above formula, 0 < X ≤ 1, 0 < Y ≤ 1;

[0016] Chemical Formula 2:

[0017] YbY X V Y Si2O7:M

[0018] In the above formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0019] Chemical Formula 3:

[0020] Yb 2-x Y Y V Z Si2O7:M

[0021] In the above formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0022] Chemical Formula 4:

[0023] Yb a Y X V Y Si Z O4:M

[0024] In the above formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0025] Preferably, the color L value of the light-emitting body is 50 or more, and the fineness of the fiber is in the range of 1 denier to 4 denier.

[0026] The fiber-forming polymer is selected from the group consisting of polyesters, acrylates, polyamides, polyvinyl alcohols, acetates, polypropylenes, polyolefins, polycarbonates, and celluloses.

[0027] The polyester fiber-forming polymer is one or more selected from the group consisting of polyethylene terephthalate homopolymer, polyethylene terephthalate copolymer, polybutylene terephthalate, polycyclohexane dimethyl terephthalate, polycyclohexanedimethanol terephthalate, and polypropylene terephthalate.

[0028] Another embodiment of the present invention relates to a method for preparing a fiber for fabric authenticity identification, characterized in that, in the polymerization process, an infrared light-emitting slice is prepared by introducing a light-emitting body represented by any one of Chemical Formula 1 to Chemical Formula 4 below. The average particle size of the light-emitting body is 0.5 μm or more and less than 5 μm, and the emission wavelength is 800 nm to 2500 nm. Then, the slice is spun into a fiber.

[0029] Chemical Formula 1:

[0030] Y X V Y O3:Sb

[0031] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1;

[0032] Chemical Formula 2:

[0033] YbY X V Y Si2O7:M

[0034] In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0035] Chemical Formula 3:

[0036] Yb 2-x Y Y V Z Si2O7:M

[0037] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0038] Chemical Formula 4:

[0039] Yb a YX V Y Si Z O4:M

[0040] In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0041] Another embodiment of the present invention relates to a method for preparing a fiber for identifying the authenticity of a fabric, which is characterized in that an infrared light-emitting slice is prepared by compounding a luminescent powder represented by any one of the following Chemical Formula 1 to Chemical Formula 4. The average particle size of the luminescent powder is 0.5 μm or more and less than 5 μm, and the emission wavelength is 800 nm to 2500 nm. Then, the slice is spun into a fiber.

[0042] Chemical Formula 1:

[0043] Y X V Y O3:Sb

[0044] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1;

[0045] Chemical Formula 2:

[0046] YbY X V Y Si2O7:M

[0047] In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0048] Chemical Formula 3:

[0049] Yb 2-x Y Y V Z Si2O7:M

[0050] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0051] Chemical Formula 4:

[0052] Yb a Y X V Y Si Z O4:M

[0053] In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0054] Another embodiment of the present invention relates to a method for preparing fibers for identifying the authenticity of fabrics, which is characterized by comprising: preparing a masterbatch by compounding a fiber-forming polymer chip with a luminescent powder represented by any one of Chemical Formula 1 to Chemical Formula 4, wherein the average particle size of the luminescent powder is 0.5 μm or more and less than 5 μm, and the luminescence wavelength is 800 nm to 2500 nm; and mixing the masterbatch with a common chip and then performing spinning,

[0055] Chemical Formula 1:

[0056] Y X V Y O3:Sb

[0057] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1;

[0058] Chemical Formula 2:

[0059] YbY X V Y Si2O7:M

[0060] In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0061] Chemical Formula 3:

[0062] Yb 2-x Y Y V Z Si2O7:M

[0063] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0064] Chemical Formula 4:

[0065] Yb a Y X V Y Si Z O4:M

[0066] In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0067] Another embodiment of the present invention relates to a fabric authenticity identification system using fibers for fabric authenticity identification, which includes: fabric, including the fabric authenticity identification fibers of the present invention as described above; an infrared light source unit, which releases infrared rays to the authenticity identification target fabric; an infrared receiving unit, which receives infrared rays reflected from the authenticity identification target fabric; and a control unit, which controls the infrared light source unit and the infrared receiving unit, and uses the infrared rays received from the infrared receiving unit to determine the authenticity of the authenticity identification target fabric.

[0068] Effects of the Invention

[0069] The fiber for fabric authenticity identification containing an infrared luminous body of the present invention is contained inside a yarn or a fabric, thereby providing an effect of authenticity identification or preventing counterfeiting. For example, for a specific functional product, analysis after fabric preparation becomes complicated and impractical, but the fiber for fabric authenticity identification of the present invention can achieve rapid and accurate identification.

[0070] Furthermore, the fiber for fabric authenticity identification that emits near infrared rays of the present invention can provide the following significant advantages, namely, it has excellent spinning processability and can maintain the physical properties of the yarn.

[0071] According to the present invention, a portable device can be used to easily and quickly identify whether a fabric is made of the required yarn. DETAILED DESCRIPTION

[0072] Hereinafter, the present invention will be described in more detail.

[0073] Throughout the present specification, when it is mentioned that a part “includes” a certain component, unless there is a special description to the contrary, it means that other components are also included, rather than excluding other components.

[0074] One embodiment of the present invention relates to a fiber for fabric authenticity identification, wherein the fiber is composed of a fiber-forming polymer and contains 50ppm to 1000ppm of a luminescent body represented by any one of the following chemical formulas 1 to 4, wherein the average particle size of the luminescent body is greater than 0.5μm and less than 5μm, and the luminescent wavelength is 800nm ​​to 2500nm.

[0075] Chemical formula 1:

[0076] Y X V Y O3:Sb

[0077] In the above formula, 0 <X≤1,0<Y≤1;

[0078] Chemical formula 2:

[0079] Yj Y X VY Si2O7:M

[0080] In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0081] Chemical formula 3:

[0082] Yb 2-x Y Y V Z Si2O7:M

[0083] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0084] Chemical formula 4:

[0085] Yb a Y X V Y Si Z O4:M

[0086] In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0087] The fiber for identifying the authenticity of the fabric of the present invention contains an infrared light emitter and exhibits infrared fluorescence characteristics, and thus can be used as a security yarn, a fine yarn, and a fiber for identifying the authenticity of a fabric (security fibers) for preventing the forgery of yarns or fabrics.

[0088] In the present invention, the emission wavelength of the light emitter is from 800 nm to 2500 nm, and more preferably, the emission wavelength of the light emitter is from 800 nm to 1500 nm. If the emission wavelength of the light emitter is less than 800 nm, the emission color is very conspicuous (fluorescence) because it is in the visible light region, and when it exceeds 2500 nm, the energy of the wavelength is weak, so it may be difficult to detect.

[0089] The average particle size of the light emitter used in the present invention is 0.5 μm or more and less than 5 μm, and more preferably, the average particle size of the light emitter is from 0.5 μm to 3 μm. If the average particle size of the light emitter is less than 0.5 μm, the emission intensity becomes weak, so it may be difficult to identify the authenticity of the yarn. If the average particle size of the light emitter is 5.0 μm or more, the yield in the spinning process may be reduced, and it is difficult to ensure the physical properties of the yarn.

[0090] The content of the luminophore contained in the fabric authenticity identification fiber of the present invention is 50ppm to 1000ppm. If the content of the luminophore is less than 50ppm, the infrared luminous intensity is weak, so it is difficult to identify it from the yarn. On the contrary, if it exceeds 1000ppm, it is economically unfeasible.

[0091] The color L value of the luminous body of the present invention is 50 or more, and more preferably, the color L value is 70 or more. If the color L value is less than 50, the color of the yarn becomes dark, and thus its use may be limited.

[0092] The fiber for fabric authenticity identification of the present invention has a fineness of 1 to 4 deniers. If the fineness of the fiber for fabric authenticity identification is less than 1 denier, the spinning processability is reduced, and on the contrary, if the fineness exceeds 4 deniers, it is not suitable for industrial use.

[0093] The fiber-forming polymer constituting the fabric authenticity identification fiber of the present invention may be one or more selected from the group consisting of polyesters, acrylics, polyamides, polyvinyl alcohols, acetates, polypropylenes, polyolefins, polycarbonates and celluloses.

[0094] Specific examples of the polyester fiber-forming polymer include polyethylene terephthalate homopolymer, polyethylene terephthalate copolymer, polybutylene terephthalate, polycyclohexylcyclohexane diphthalate, polycyclohexane terephthalate, and polytrimethylene terephthalate, but are not necessarily limited thereto.

[0095] Yet another embodiment of the present invention relates to a method for preparing a fiber for fabric authenticity identification comprising a luminous body.

[0096] In the polymerization process of the method of one embodiment of the present invention, an infrared luminescent slice is prepared by adding a luminescent body represented by any one of the following Chemical Formulas 1 to 4, wherein the average particle size of the luminescent body is greater than 0.5 μm and less than 5 μm, and the luminescent wavelength is 800 nm to 2500 nm, and then the slice is spun into fibers.

[0097] Chemical formula 1:

[0098] Y X V Y O3:Sb

[0099] In the above formula, 0 <X≤1,0<Y≤1;

[0100] Chemical formula 2:

[0101] Yj Y X V Y Si2O7:M

[0102] In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0103] Chemical formula 3:

[0104] Yb 2-x Y Y V Z Si2O7:M

[0105] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0106] Chemical formula 4:

[0107] Yb a Y X V Y Si Z O4:M

[0108] In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0109] In the present invention, the addition amount of the light-emitting body is about 50 ppm to 1000 ppm, and it is sufficiently mixed with the fiber-forming resin, and then it can be extruded with an extruder to prepare a masterbatch. In this case, the operating conditions of the extruder can be adjusted according to the type of synthetic resin. As described above, the synthetic resin released through the nozzle of the extruder can be processed into chips for the fiber preparation step, that is, the spinning process. The size of each chip can be about 5 mm 3 to about 15 mm 3 , more specifically, it can be about 8 mm 3 to 12 mm 3 . Slight deformation can be made to the preparation conditions during the preparation process. In the method of the present invention, the spinning process for preparing fibers refers to the process of fibrillating the masterbatch after mixing the light-emitting body and the fiber-forming resin.

[0110] In other examples, the fiber for fabric authenticity identification of the present invention can also be prepared by the following method, that is, by compounding the fiber-forming polymer chips with the light-emitting body powder represented by any one of Chemical formulas 1 to 4, the average particle size of the light-emitting body powder is 0.5 μm or more and less than 5 μm, and the emission wavelength is 800 nm to 2500 nm, and then spinning the chips into fibers.

[0111] Chemical formula 1:

[0112] Y X V Y O3:Sb

[0113] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1;

[0114] Chemical formula 2:

[0115] YbY X V Y Si2O7:M

[0116] In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0117] Chemical formula 3:

[0118] Yb 2-x Y Y V Z Si2O7:M

[0119] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0120] Chemical formula 4:

[0121] Yb a Y X V Y Si Z O4:M

[0122] In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0123] The method for preparing another fiber for identifying the authenticity of a fabric includes: preparing a masterbatch by compounding a fiber-forming polymer chip with a luminescent powder represented by any one of Chemical formulas 1 to 4 below, the average particle size of the luminescent powder being 0.5 μm or more and less than 5 μm, and the luminescent wavelength being 800 nm to 2500 nm; and spinning after mixing the masterbatch with a common chip.

[0124] Chemical formula 1:

[0125] Y X V Y O3:Sb

[0126] In the formula, 0 < X ≤ 1, 0 < Y ≤ 1;

[0127] Chemical formula 2:

[0128] YbY X V Y Si2O7:M

[0129] In the above formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ;

[0130] Chemical formula 3:

[0131] Yb 2-x Y Y V Z Si2O7:M

[0132] In the above formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ;

[0133] Chemical formula 4:

[0134] Yb a Y X V Y Si Z O4:M

[0135] In the above formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

[0136] Moreover, the method for preparing the fiber for fabric authenticity identification of the present invention may further include the step of dyeing or coating the spun fiber. For this purpose, a conventional infrared emitter can be attached to the outer surface of the fiber by dyeing or coating methods.

[0137] Another embodiment of the present invention relates to a fabric authenticity identification system using the fiber for fabric authenticity identification, including: a fabric containing the fiber for fabric authenticity identification of the present invention as described above; an infrared light source unit that emits infrared rays to the fabric to be identified for authenticity; an infrared receiving unit that receives the infrared rays reflected from the fabric to be identified for authenticity; and

[0138] a control unit that controls the infrared light source unit and the infrared receiving unit, and determines the authenticity of the fabric to be identified for authenticity by using the infrared rays received by the infrared receiving unit.

[0139] The infrared light source unit can emit infrared rays to one or more points of the yarn or fabric, and the infrared receiving unit can receive the near-infrared rays or infrared rays reflected from the yarn or fabric.

[0140] The authenticity identification system of the present invention detects the spectrum of special wavelengths released from the yarn or fabric sample by irradiating light onto the surface of the yarn or fabric containing the luminous body, thereby accurately detecting whether the luminous body of the yarn or fabric sample exists.

[0141] The authenticity identification system of the present invention may include: a display unit for displaying the detection value; an operation unit for receiving user input; a communication unit connected to the control unit and responsible for communication between the control unit and an external information processing device; and a power supply unit connected to the control unit and providing power.

[0142] The "~part" used in this embodiment includes software components, object-oriented software components, class components, task components and other components, processes, functions, properties, procedures, subroutines, program code segments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays and variables.

[0143] Hereinafter, the present invention will be described in more detail by way of examples.

[0144] The present examples are provided to explain the present invention in more detail, but the scope of the present invention is not limited to these examples.

[0145] Example

[0146] Embodiment 1 to Embodiment 3

[0147] With respect to 100 parts by weight of polyethylene terephthalate resin, 1 part by weight of YVO3:Yb (IRumina 1050S of Nanocms) having an average particle size of 1.0 μm is mixed with the polyethylene terephthalate resin through a melt extruder to prepare a masterbatch. With respect to 100 parts by weight of an existing ordinary polyethylene terephthalate resin, the masterbatch containing the luminophtalate is mixed in an amount of 1.0 part by weight (Example 1), 2.5 parts by weight (Example 2), and 5.0 parts by weight (Example 3), melted at a temperature of 280°C, and spun through a spinneret at a speed of 3200 m / min to prepare a semi-stretched yarn. It is false-twisted at a draw ratio of 1.70, a draw temperature of 220°C, and a false-twisting speed of 500 m / min to obtain a false-twisted yarn of 75 denier / 36 filaments.

[0148] Comparative Example 1

[0149] A false twisted yarn of 75 denier / 36 filaments was obtained in the same manner as in Example 1 except that only conventional general polyethylene terephthalate resin was used without using a luminous body.

[0150] Comparative Example 2

[0151] A false twisted yarn of 75 denier / 36 filaments was obtained in the same manner as in Example 1 except that 0.4 parts by weight of a masterbatch containing a light emitting body was mixed with 100 parts by weight of the polyethylene terephthalate resin.

[0152] Comparative Example 3 to Comparative Example 4

[0153] False twisted yarns of 75 denier / 36 filaments were obtained in the same manner as in Example 1 except that YVO3:Yb having an average particle size of 0.1 μm (Comparative Example 3) and 5 μm (Comparative Example 4) was used as the luminous body.

[0154] Experimental Example 1

[0155] The physical properties of the fibers for fabric authenticity identification prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were measured using the following method. The results are shown in Table 1 below.

[0156] *Strength and elongation: The strength and elongation of the recycled polyester long fiber were measured using Instron 5565 from Instron and evaluated according to KS K 0412 standard.

[0157] *Processability: measured as the ratio of yarn produced to raw material input.

[0158] Good: yield is more than 90%, bad: yield is less than 90%

[0159] *Infrared detection amount: The fabric authenticity identification fibers prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were irradiated with near infrared light with a wavelength of 980 nm, and the near infrared intensity at 1020 nm was calculated as the detection amount. The measured value was corrected with respect to the value detected in Example 1 and the relative value was recorded.

[0160] [Table 1]

[0161]

[0162] Although the present invention has been described above with reference to specific examples, it should be understood that this is only an example, and a person skilled in the art of the present invention can deduce various modifications and variations from it. Therefore, the true technical protection scope of the present invention should be defined based on the technical concept of the attached invention claims.

Claims

1. A fiber for fabric authenticity identification, characterized in that: The fiber is composed of a fiber-forming polymer, and contains 50 ppm to 1000 ppm of a luminophore represented by any one of the following chemical formulas 1 to 4, wherein the average particle size of the luminophore is greater than 0.5 μm and less than 5 μm, and the luminescent wavelength is 800 nm to 2500 nm. Chemical formula 1: Y X V Y O3:Sb In the above formula, 0 <X≤1,0<Y≤1; Chemical formula 2: YbY X V Y Si2O7:M In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 3: Yb 2-x Y Y V Z Si2O7:M In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 4: Yb a Y X V Y Si Z O4:M In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

2. The fiber for fabric authenticity identification according to claim 1, characterized in that: The color L value of the phosphor is 50 or more.

3. The fiber for fabric authenticity identification according to claim 1, characterized in that: The fiber has a fineness of 1 denier to 4 denier.

4. The fiber for fabric authenticity identification according to claim 1, characterized in that: The fiber-forming polymer is selected from the group consisting of polyesters, acrylics, polyamides, polyvinyl alcohols, acetates, polypropylenes, polyolefins, polycarbonates and celluloses.

5. The fiber for fabric authenticity identification according to claim 4, characterized in that: The polyester fiber-forming polymer is at least one selected from the group consisting of polyethylene terephthalate homopolymer, polyethylene terephthalate copolymer, polybutylene terephthalate, polycyclohexylcyclohexane diphthalate, polycyclohexane terephthalate, and polytrimethylene terephthalate.

6. A method for preparing a fiber for fabric authenticity identification, characterized in that: In the polymerization process, an infrared luminescent slice is prepared by adding a luminophore represented by any one of the following chemical formulas 1 to 4, wherein the average particle size of the luminophore is greater than 0.5 μm and less than 5 μm, and the luminescent wavelength is 800 nm to 2500 nm, and then the slice is spun into fibers. Chemical formula 1: Y X V Y O3:Sb In the above formula, 0 <X≤1,0<Y≤1; Chemical formula 2: YbY X V Y Si2O7:M In the formula, 0 < X ≤ 1 and 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 3: Yb 2-x Y Y V Z Si2O7:M In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 4: Yb a Y X V Y Si Z O4:M In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

7. A method for preparing a fiber for fabric authenticity identification, characterized in that: The infrared luminescent chips are prepared by compounding a fiber-forming polymer chip with a luminescent powder represented by any one of the following chemical formulas 1 to 4, wherein the average particle size of the luminescent powder is 0.5 μm or more and less than 5 μm, and the luminescent wavelength is 800 nm to 2500 nm, and then spinning the chip into fibers. Chemical formula 1: Y X V Y O3:Sb In the above formula, 0 <X≤1,0<Y≤1; Chemical formula 2: YbY X V Y Si2O7:M In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 3: Yb 2-x Y Y V Z Si2O7:M In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 4: Yb a Y X V Y Si Z O4:M In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

8. A method for preparing a fiber for fabric authenticity identification, characterized in that: include: A luminescent masterbatch is prepared by compounding a fiber-forming polymer chip with a luminescent powder represented by any one of the following chemical formulas 1 to 4, wherein the luminescent powder has an average particle size of 0.5 μm or more and less than 5 μm and a luminescent wavelength of 800 nm to 2500 nm; and The luminescent masterbatch is mixed with ordinary chips and then spun. Chemical formula 1: Y X V Y O3:Sb In the above formula, 0 <X≤1,0<Y≤1; Chemical formula 2: YbY X V Y Si2O7:M In the formula, 0 < X ≤ 1, 0.01 < Y ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 3: Yb 2-x Y Y V Z Si2O7:M In the formula, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ ; Chemical formula 4: Yb a Y X V Y Si Z O4:M In the formula, 0 < a ≤ 1, 0 < X ≤ 1, 0 < Y ≤ 1, 0 < Z ≤ 1, and M is Nd 3+ or Er 3+ .

9. A fabric authenticity identification system using fabric authenticity identification fibers, characterized in that: include: A fabric, comprising the fabric authenticity identification fiber according to any one of claims 1 to 5; An infrared light source unit emits infrared rays toward the fabric to be authenticated; An infrared receiving unit receives infrared rays reflected from the fabric of the object to be authenticated; as well as The control unit controls the infrared light source unit and the infrared receiving unit, and uses the infrared rays received from the infrared receiving unit to judge the authenticity of the fabric to be authenticated.

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