Security yarn containing multi-component spinning fiber and security product using the same

Patent metadata

Field	Value
Publication number	US-10584430-B2
Application number	US-201314443581-A
Country	US
Kind code	B2
Filing date	Oct 15, 2013
Priority date	Oct 15, 2012
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

The present invention discloses a security yarn containing a multi-composite spinning fiber and security products using the same. The multi-composite spinning fiber, according to the present invention, contains, in at least one or more kinds of polymer materials, a first component selected from an IR reactive pigment or an IR absorption pigment, a second component selected from a visible pigment or an invisible UV-reactive fluorescent pigment, and a third component selected from X-ray absorption materials, so that the security yarn containing the multi-component spinning fiber can be identified by infrared and ultraviolet wavelength and easily identified when irradiated with X-rays, thus providing a multi-identification capability and being useful for preventing counterfeiting. Therefore, the security yarn containing a multi-composite spinning fiber can be useful for preventing the counterfeiting of paper money, gift certificates, marketable securities, and passports or the like, preventing imitations of expensive brand-name products, or identifying a friend or a foe for military purposes.

First claim

The invention claimed is:

1. A security yarn containing a multi-component fiber, wherein the multi-component fiber comprises at least three different polymers, a first pigment, wherein the first pigment is an IR reactive pigment or an IR absorption pigment, a second pigment, wherein the second pigment is a visible pigment or an invisible UV-reactive fluorescent pigment, and third material, wherein the third material is a X-ray absorption material,
wherein, the multi-component fiber includes at least three different zones in a cross-section of the multi-component fiber, wherein the at least three different polymers include a polymer A, a polymer B, and a polymer C, wherein the polymers are arranged in a A-B-C cross-sectional configuration,
wherein, the polymer A located at an outer area of the multi-component fiber comprises a hydrophilic polymer resin or a polyester resin so that the dispersion rate in water is improved upon the paper making process, and the polymer B or C located at a core area of the multi-component fiber comprises polypropylene (PP) having a specific gravity of less than 1 or polyethylene (PE) having a specific gravity of less than 1,
wherein at least one of the first pigment, the second pigment, and the third material is dispersed in each of the at least three different polymers such that the multi-component fiber is configured to have a multi-identification capability due to the at least three different zones in the cross-section of the multi-component fiber and by each of the first pigment, the second pigment, and the third material,
wherein a weight ratio of the hydrophilic polymer resin or the polyester resin in the polymer A of the multi-component fiber is controlled to provide the multi-component fiber having a specific gravity of more than 1.

2. The security yarn according to claim 1 , wherein the multi-component fiber has a circular cross section or have any one modified cross section selected from the group consisting of triangular, rectangular, polygonal, oval, −shaped, Y shaped, +shaped, # shaped and * shaped cross sections.

3. The security yarn according to claim 1 , wherein the at least three different polymers are arranged to provide any one of the fibers selected from the group consisting of core-sheath type, sea-island type and side-by-side type fibers.

4. The security yarn according to claim 1 , wherein 0.001 to 50% by weight of the first pigment is contained in any one of the at least three different polymers.

5. The security yarn according to claim 1 , wherein 0.001 to 50% by weight of the second pigment is contained in any one of the at least three different polymers.

6. The security yarn according to claim 1 , wherein the third material is formed of a material having an X-ray shielding function and satisfying a specific gravity in the form of powder of one or more at a room temperature or 300° C.

7. The security yarn according to claim 1 , wherein the polymer A comprises at least one hydrophilic polymer resin selected from the group consisting of nylon, polyacrylonitrile, polyacrylic acid, polyacrylate, polymethyl methacrylate, polyethylene amide, cellulos acetate, cellulose triacetate, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, sulfonated polysulfone, polyethylene oxide and polyvinyl acetate or at least one polyester resin selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate and polyethylene naphthalate.

8. The security yarn according to claim 1 , wherein the polymer B or C comprises a polymer resin-selected from the group consisting of polypropylene, polyethylene, polyethylene terephthalate, polyethylene naphthalate, polystyrene, polycarbonate, polymethyl methacrylate, polyether sulfone, polyvinylidene fluoride, polyether ketone, polyphenylene sulfide and aromatic polyester.

9. A counterfeit money prevention product applied to any one of paper money, gift certificates, marketable securities, and passports through a paper making process processed mixedly with security yarn containing a multi-component fiber having a multi-identification capability as claimed in claim 1 .

10. An imitation prevention product applied to any one of bags, shoes and clothes comprising security yarn having a multi-component fiber having a multi-identification capability as claimed in claim 1 .

11. A military identification friend or foe product applied to any one of military products using security yarn containing a multi-component fiber having a multi-identification capability as claimed in claim 1 .

Assignees

• Korea Inst Ind Tech

Inventors

• Hahm Wan-Gyu
• Byun Sung Won
• Yeang Byeong Jin
• Nam In Woo
• Lee Seung Jin
• Kim Do Gun
• Lim Ki Sub

Classifications

• D01D5/30

  Conjugate filaments; Spinnerette packs therefor · CPC title

• Y10T428/2931

  Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.] · CPC title

• D01F1/04

  Pigments · CPC title

• D21H21/44

  Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods · CPC title

• D10B2331/02

  polyamides (D10B2331/08 takes precedence) · CPC title