WO2008034381A1 - Fibre fluorescente protégée contre la falsification et matériau protégé contre la falsification dont la modification du caractère de vision est entraînée par une modification d'angle de lumière excitée - Google Patents

Fibre fluorescente protégée contre la falsification et matériau protégé contre la falsification dont la modification du caractère de vision est entraînée par une modification d'angle de lumière excitée Download PDF

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Publication number
WO2008034381A1
WO2008034381A1 PCT/CN2007/070590 CN2007070590W WO2008034381A1 WO 2008034381 A1 WO2008034381 A1 WO 2008034381A1 CN 2007070590 W CN2007070590 W CN 2007070590W WO 2008034381 A1 WO2008034381 A1 WO 2008034381A1
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WIPO (PCT)
Prior art keywords
fiber
counterfeit
security
luminescent
luminescent material
Prior art date
Application number
PCT/CN2007/070590
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English (en)
Chinese (zh)
Inventor
Xianlin Sun
Original Assignee
Xianlin Sun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xianlin Sun filed Critical Xianlin Sun
Publication of WO2008034381A1 publication Critical patent/WO2008034381A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper

Definitions

  • a fluorescent anti-counterfeiting fiber and an anti-counterfeiting material containing the fiber in particular, a fluorescent anti-counterfeiting fiber whose visual characteristic of the anti-counterfeit fiber changes with an angle of excitation light irradiation, and an anti-counterfeiting material containing the fiber.
  • Fluorescent anti-counterfeiting fiber refers to a fiber containing photoluminescent material. It is widely used as a basic anti-counterfeiting material in the currencies of all countries and is widely used in many securities and anti-counterfeiting papers. Its fatal flaw is that its visual characteristics are easily imitated by the printing thin lines of fluorescent inks, which makes the anti-counterfeiting effect of the existing fluorescent anti-counterfeiting fibers greatly reduced. This is a problem that people have long been trying to solve and have not been solved. Summary of the invention
  • the object of the present invention is to provide a fluorescent anti-counterfeiting fiber which changes the visual angle or the visual effect caused by a change in the angle of the excitation light, and an anti-counterfeiting material which is added to the anti-counterfeit fiber, and changes the irradiation angle of the excitation light to the anti-counterfeit fiber, and the human eye is in the anti-counterfeit fiber or the anti-counterfeit material.
  • the obvious change of the illuminating color of the anti-counterfeit fiber can be seen in any orientation of the surface, so that the printing thin line of the fluorescent ink cannot be imitated.
  • An anti-counterfeit fiber characterized in that: a single anti-counterfeit fiber has at least two material portions distributed in a cross section and extending in parallel along at least a certain length along a longitudinal direction of the fiber: a first material portion and a second material portion; These material portions have different optical properties, in particular materials having different photoluminescence properties and/or blocking excitation light properties, and the distribution of at least two material portions in cross section allows for the formation of energy between the two material portions.
  • the shielding structure that partially or completely blocks the excitation light has at least two illumination angles A and B on the security fiber, and has a visual effect that is significantly different from that when irradiated from the illumination angle B when the excitation light is irradiated from the illumination angle A.
  • the material portions are distributed in a juxtaposed relationship or a partial inclusion relationship on a cross section of the security fiber to form an occlusion structure for the excitation light, and different visual effects include changing from one luminescent color to another luminescent color, or It is changed from a luminescent color to a luminescent color.
  • the first material portion is a luminescent material 1 emitting visible light C under excitation light
  • the second material portion is a barrier material 2 capable of blocking excitation light under excitation light
  • the luminescent material 1 and the barrier material 2 are parallel along the length of the fiber. extend, Since the distribution of the luminescent material 1 and the barrier material 2 forms an occlusion structure, when the irradiation angle of the excitation light is changed, the human eye can see the luminescent color C of the security fiber at any angle from scratch or from nothing to nothing.
  • the first material portion is the luminescent material 1 and the second material portion is the other luminescent material 3.
  • the luminescent color C of the luminescent material 1 and the luminescent color D of the other luminescent material 3 have a distinct visual difference.
  • the other luminescent material 3 extends in parallel along the longitudinal direction of the fiber to change the irradiation angle of the excitation light, and the luminescent color of the anti-counterfeit fiber. Change 1).
  • the shapes of the two material portions are each formed into a half circle and juxtaposed into a circular shape, or two right triangles may be arranged in a square shape. Forms an occlusion structure for light.
  • the luminescent material of the present invention may be a material that converts into light by absorbing the energy of the excitation light, so that the luminescent material is a light absorbing material that absorbs the excitation light, so that the excitation light is irradiated to another material portion having an occlusion relationship. Up, an excitation light absorber can be added to the luminescent material.
  • the barrier in the barrier material is intended to prevent the excitation light from passing through, including the ability to absorb or reflect the excitation light, but not to emit visible light; the barrier material can transmit both the excitation and visible light, or the visible light, or it can be colored. (ie can emit or reflect visible light).
  • the barrier material When the barrier material is unable to transmit visible light, the visual characteristics seen at different angles of the naked eye are different when the angle of illumination of the excitation light is changed.
  • Parallel extension means that the material parts of a single security fiber cannot be twisted in the longitudinal direction, that is, there is no twist. Further, a third material portion is present between the luminescent material 1 and another luminescent material 3. The third material portion is a barrier material 4 that absorbs excitation light, and the luminescent material 1, another luminescent material 3, and the barrier material 4 are along the fiber. The length direction extends in parallel.
  • the security fiber is a fiber in which at least two of the anti-counterfeit fibers having the material portion and the distribution characteristics thereof are juxtaposed in a lateral direction, such as two circular juxtapositions and two right-angled triangles juxtaposed.
  • the security fiber is a fiber in which at least two of the security fibers having the material portion and the distribution characteristics thereof are laterally juxtaposed
  • the outer layer of the anti-counterfeit fiber is further coated with a transparent material 6 capable of transmitting both excitation light and visible light, and in particular, a transparent material is coated, and the anti-counterfeit fiber is formed into a flat shape outside the cross section.
  • At least two of the material portions distributed along the cross section of the security fiber have different thermal elongations.
  • the anti-counterfeit fibers are curved along a mid-vertical plane formed by the central axis 5, and the luminescent material is distributed on the left and right sides of the mid-vertical surface.
  • the anti-counterfeit fiber is a closed loop.
  • a security fiber can have two or more segments, one of which is viewed at any angle. There is no change in the characteristics of the senses.
  • the security fiber is flat in the lateral direction, and the luminescent material 1 or the other luminescent material 3 is on the upper and lower surfaces of the flat surface, respectively.
  • the anti-counterfeiting fiber contains a luminescent material containing at least two different excitation light frequencies in each material portion of the luminescent material, such as 250 nm ultraviolet light, 365 nm ultraviolet light, and infrared light, and in particular, various materials mentioned above.
  • a colored material that can be directly recognized by the naked eye is added.
  • the security fiber is a fiber short yarn having a length of not more than 20 mm.
  • the security fiber is a security thread having a length of not less than lm.
  • An anti-counterfeiting material having the above-mentioned anti-counterfeit fiber, wherein the vertical axis 5 of the anti-counterfeit fiber is perpendicular to the surface of the anti-counterfeit material, and the illuminating material is distributed on the left and right sides of the mid-vertical surface formed by the central axis 5, the structure
  • the visual feature is that on the surface of the same anti-counterfeit material, the illumination angle of the excitation light is changed to change.
  • An anti-counterfeiting material having the above-mentioned anti-counterfeit fiber characterized in that the anti-counterfeit fiber is flat in the lateral direction, and the luminescent material 1 or another luminescent material 3 is respectively distributed on the upper and lower surfaces of the flat surface, the upper and lower surfaces of the flat surface and the anti-counterfeiting
  • the surface of the material is nearly parallel.
  • the visual characteristics of the structure are: On the surface of the same anti-counterfeit material, the illumination angle of the excitation light is changed without changing, but when the excitation light is irradiated on both sides of the anti-counterfeit material, the illumination is illuminated. The color will change.
  • This structure requires a certain transparency of the anti-counterfeiting material, and is not suitable for thick paper and cardboard.
  • the fibers are short fibers of not more than 20 mm
  • the fibers are randomly mixed into the pulp layer.
  • Anti-counterfeiting short fibers can be distributed on the surface of the paper and in the surface of the paper.
  • the interlayer between the layers of pulp can be distributed in various papers, such as various quantitative stamp papers, carbonless copy paper, double offset paper, bond paper, banknote paper, and coated Cloth paper, white cardboard and various types of cardboard anti-counterfeiting materials can also be plastic films.
  • a long safety thread can be formed into a roll, which is formed in the paper by means of a positioning and paying line, and may be entirely buried in the paper, partially embedded in the paper, or attached to the paper. The surface of the paper board.
  • the anti-counterfeiting fiber is as short as a certain degree, for example, 0.5 mm, so as to be shorter.
  • the security fiber of the present invention has at least two material portions distributed in cross section and extending in parallel along at least a certain length along the length of the fiber: a first material portion and a second material portion; these material portions have different light characteristics In particular, materials having different photoluminescence properties and/or blocking excitation light characteristics, and the distribution of the at least two material portions in cross section such that an occlusion between the two material portions can partially or completely block the excitation light.
  • a structure wherein at least two illumination angles A and B are present on the security fiber, and when the excitation light is irradiated from the illumination angle A, there is a slave illumination Significantly different visual effects when angle B is illuminated.
  • the unique properties of at least two material portions and the organic combination in structure can cause different visual effects when the excitation light illuminates the security fiber from different angles.
  • the excitation light can be seen as the luminescent color C when it is irradiated to the luminescent material 1, and the luminescent material 1 illuminates while absorbing the excitation light, and the other material portion and the luminescent material 1 are occluded.
  • the other material portion is composed of a barrier material, blocking the excitation light from which the excitation light is irradiated from the other material portion, that is, the luminescent material 1 cannot be irradiated, and if the other material portion is another luminescent material 3, The excitation light is blocked from the luminescent material 3.
  • the luminescent color D can be seen, and the luminescent material 3 illuminates while absorbing the excitation light, and the occlusion structure formed by the two materials blocks the excitation.
  • the illumination is directed to the luminescent material 1, so that the human eye can observe the change of the illuminating color of the anti-counterfeit fiber by simply changing the angle of the excitation light source without moving, and the vision of the specific material and its specially designed occlusion structure combination
  • the effect is that printing inks cannot be imitated.
  • the cross-section of the anti-counterfeit fiber is circular or square, and is a curved fiber and the anti-counterfeit fiber is flat or multi-triangular or multi-square in the lateral direction, so that the anti-counterfeit fiber can be added after the anti-counterfeiting material is added.
  • Our need will be unique: the partial surface of the luminescent material 1 and the barrier material 2, either together or individually, naturally appears on a particular surface of the security material.
  • the purpose of making the special part of the anti-counterfeiting fiber naturally appear on at least one surface of the anti-counterfeiting material is to control the observable surface of the anti-counterfeiting material on one side of the anti-counterfeiting fiber.
  • the projection surface is anti-counterfeiting fiber.
  • the surface of the anti-counterfeit fiber of the largest projection surface can be naturally presented on at least one surface of the anti-counterfeit material, and can be implemented in three ways: First, the anti-counterfeit fiber is covered with a flat transparent material to form a flat fiber, and the anti-counterfeit fiber is used. The portion of the surface faces the flat surface of the transparent material such that the flat surface of the flat fiber is naturally parallel to the observable surface of the security material such that the desired portion of the surface is present on the observable surface of the security material.
  • Another implementation manner is to make the anti-counterfeit fiber into a curved or bent shape, the fiber has a certain toughness, and the part of the surface is located on the curved or bent outer surface, so that when the anti-counterfeiting material is added, the anti-counterfeit fiber can bend itself or The bent state is presented on the observable surface of the security material.
  • a third implementation manner is to make the transverse direction of the whole or part of the length of the anti-counterfeit fiber into a flat shape, and the part of the surface of the anti-counterfeit fiber is located on the flat surface of the flat-shaped cross section or the anti-counterfeit fiber surface facing the flat mask
  • the flat surface of the anti-counterfeiting material can be naturally oriented toward the observable surface; for the case where the cross section of the fiber portion is flat, the flat section can face the observable surface, and the flat surface The corresponding other parts with a common orientation naturally follow the observable surface.
  • the identifier only needs to hold the excitation light source (such as ultraviolet light or infrared light) to change the illumination angle during the specific observation, and the human eye is arbitrary.
  • the excitation light source such as ultraviolet light or infrared light
  • the human eye is arbitrary.
  • Position observable since the luminescent material and the barrier material are transparent to visible light, the illuminating portion of the illuminating color that is blocked by the three-dimensional structure is also transmitted without being lost, thereby making the brightness observed by the human eye. The loss is small.
  • Figure la shows an embodiment of a security fiber having a circular cross-sectional shape.
  • the fibers are curved along a mid-vertical plane formed by the central axis 5, and the luminescent material and the excitation light-blocking material extend in parallel along the longitudinal direction of the fiber;
  • Fig. 1c shows a cross-sectional view of the security fiber shown in Fig. la added to the security paper 7.
  • FIG. 2a is a cross section of a flat-shaped anti-counterfeit fiber having a cross-sectional shape.
  • the luminescent material and the excitation light-blocking material form a partial inclusion relationship in cross section, and the two material portions extend in parallel along the longitudinal direction of the fiber;
  • FIG. 2b is a security paper 7 is added.
  • Fig. 3a and Fig. 3b show a cross-sectional shape of a specially designed anti-counterfeit fiber, which are circular and flat, respectively, and the luminescent material, the excitation light blocking material and the transparent material extend in parallel along the longitudinal direction of the fiber.
  • 4a and 4b respectively show that the cross-section of the security fiber is circular and square, and the luminescent material 1 and the other luminescent material 3 extend in parallel along the longitudinal direction of the fiber.
  • Figure 5a is a circular cross-section of the security fiber, the luminescent material 1, the barrier material 4 and the luminescent material) extend in parallel along the length of the fiber;
  • Figure 5b shows a top view of the security fiber shown in Figure 5a,
  • Figure 5c shows the security shown in Figure 5a A cross-sectional view of the fibers incorporated into the security paper 7.
  • Figure 6a is a flat cross-section of the security fiber, the luminescent material 1, the barrier material 4 and the other luminescent material 3 extend in parallel along the length of the fiber;
  • Figure 6b shows a cross-sectional view of the security fiber shown in Figure 6a added to the security paper 7 .
  • Figures 7a and 7b show the cross section of the security fiber as two connected circles and two connected squares, respectively.
  • 8a, 8b, 8c, 8d are anti-counterfeit fibers of a flat cross section, the transparent material 6 is coated with a circle or a square composed of the luminescent material 1 and another luminescent material 3, or two circles or two squares. The three materials extend in parallel along the length of the fiber.
  • FIG. 9a and 9b respectively show a cross section of the flat fiber, and the luminescent material 1, the barrier material 4 and the luminescent material 3 extend in parallel along the longitudinal direction of the fiber;
  • Fig. 9c shows the cross section of the security fiber shown in Fig. 9a added to the security paper 7.
  • Figure la shows a security fiber having a circular cross-sectional shape, consisting of two material parts: a luminescent material 1 and a barrier material 2, the anti-counterfeit fibers being bent along a curved median plane formed by the central axis 5, and the luminescent material 1 is distributed Mid-down spool 5
  • the security fiber is curved, and the luminescent material 1 and the barrier material 2 extend in parallel along the longitudinal direction of the fiber, and the barrier material 2 can transmit light
  • lc is the anti-counterfeiting shown in FIG.
  • the fiber is copied into the cross-sectional view of the security paper 7, and the anti-counterfeit fiber is inserted therein, and the center line 5 of the security fiber is perpendicular to the surface of the security paper 7; on the surface of the same security paper 7, when the excitation light is irradiated from the A angle, The luminescent material 1 is irradiated to emit the luminescent color C.
  • the blocking material 2 can transmit the emitted light, the human eye can see the luminescent color C in any direction of the security fiber; when the excitation light is irradiated from the B angle, the blocking material 2 is Upon irradiation, since the distribution of the luminescent material 1 and the barrier material 2 forms a blocking structure that blocks the excitation light from being irradiated onto the luminescent material 1, the human eye cannot see the luminescent color C in any direction of the security fiber.
  • the flat anti-counterfeit fibers may or may not be bent along the mid-vertical surface where the mid-perpendicular axis 5 is located.
  • the luminescent material 1 is located on one side of the center-up bobbin 5, and when randomly inserted into the paper or sandwiched between the two pulp layers, both theory and experiment have shown that the mid-perpendicular axis 5 of the security fiber is naturally perpendicular to the surface of the security paper 7.
  • Figure 3a Figure 3b is a specially designed cross section of the anti-counterfeit fiber, which has good pressure resistance, and the shape is circular and flat, respectively.
  • the luminescent material 1, the excitation light blocking material 2 and the transparent material 6 are along the length of the fiber. Parallelly extending, the luminescent material 1 is located on one side of the shaft 5, and the security fibers in Fig. 3a are bent along the axis 5.
  • Fig. 4a and Fig. 4b respectively show that the cross section of the anti-counterfeit fiber is circular and square, the circle is composed of two semicircles, and the square is composed of two equilateral right triangles, and the luminescent materials 1 and 3 are respectively located on the vertical axis 5
  • the anti-counterfeit fiber is bent along the mid-perpendicular axis, and the luminescent material 1 and the other luminescent material 3 extend in parallel along the longitudinal direction of the fiber; the luminescent material 1 and the other luminescent material 3 can transmit visible light, and the anti-counterfeit fiber can be copied into the anti-counterfeiting
  • the shaft 5 of the security fiber is naturally perpendicular to the surface of the security paper (7).
  • the luminescent material 1 when the excitation light is irradiated from the A angle, the luminescent material 1 is irradiated and the luminescent material 1 blocks the excitation light from being irradiated onto the other luminescent material 3 to emit the luminescent color C, due to the other luminescent material 3 can pass visible light, so the human eye can see the illuminating color C in any direction of the security fiber; likewise, when the excitation light is irradiated from the B angle, the other luminescent material 3 is irradiated and the other luminescent material 3 blocks the excitation light The luminescent material D is emitted by illuminating the luminescent material 1.
  • the human eye can see the luminescent color D in any direction of the security fiber, and the luminescent color C and the luminescent color D have obvious visual differences, for example.
  • the illuminating color C is red, and the illuminating D is blue or yellow.
  • the composite color Y of the luminescent color D and the luminescent color C', the more the blocking, the more the luminescent color D is, the more obvious the visual difference between the synthetic color X and the synthetic color Y, and the fiber structure of the present invention includes the feature . For example, when the illuminating color C is red and the illuminating color D is blue, the higher the blocking rate, the more obvious the visual difference is, and the best is when the barrier is completely blocked.
  • Figure 5a is a circular cross-section of anti-counterfeit fibers, consisting of a luminescent material 1, a barrier material (4) and another luminescent material 3, the barrier material 4 is located between the luminescent materials 1 and 3, and the luminescent materials 1 and 3 are respectively located in the mid-perpendicular axis
  • the security fiber is bent along the mid-perpendicular axis 5 and the three material portions extend in parallel along the length of the fiber
  • Figure 5b is a top view of the security fiber shown in Figure 5a
  • Figure 5c shows the security fiber shown in Figure 5a.
  • the cross-sectional view, theory and experiment in the security paper 7 show that the security fibers are copied into the paper, and the axis 5 of the security fiber is naturally perpendicular to the surface of the security paper 7.
  • Figure 6a is a flat cross-section of anti-counterfeit fibers, consisting of luminescent material 1, barrier material 4 and luminescent material 3, extending together in parallel along the length of the fiber;
  • Figure 6b shows the cross-section of the anti-counterfeit fiber shown in Figure 6a added to the security paper 7.
  • Figures 7a and 7b show the cross section of the security fiber as two connected circles and two connected squares, respectively.
  • 8a, 8b, 8c, 8d are anti-counterfeit fibers of a flat cross section, the transparent material 6 is covered with a circular or square shape composed of the luminescent materials 1 and 3, or two circular or two squares, three materials The portions extend in parallel along the length of the fiber.
  • Figure 9a is a cross section of a flat fiber, the luminescent material 1 and the other luminescent material 3 respectively form upper and lower portions of the flat fiber, and extend in parallel along the longitudinal direction of the fiber;
  • Figure 9b is a cross section of the flat fiber, the luminescent material 1 and The luminescent material 3 is distributed in the vicinity of the upper and lower planes of the flat fiber, respectively, and the barrier material 4 is located in the middle of the luminescent materials 1 and 3, and the three material portions extend in parallel along the longitudinal direction of the fiber;
  • FIG. 9c shows the anti-counterfeiting shown in FIG. 9a.
  • the fiber is added to the cross-sectional view of the security paper 7, and when the excitation light is separately irradiated on the two surfaces of the security paper 7, the illuminating color of the security fiber is significantly changed.
  • colored materials can also be added to the security fibers.
  • the short fibers having a flat cross section of the fiber may be formed into a straight line of 2 to 5 mm, or may be formed as a continuous long safety thread.
  • the anti-counterfeit fiber in each of the above embodiments may be provided with a length of fiber (for example, 1/2 of the length of the fiber), and all the portions of the material do not constitute a blocking structure, and the segment of the luminescent material can be at any angle perpendicular to the fiber.
  • the excitation light source is irradiated so that the generated luminescent color E does not change, and the luminescent color E of the luminescent material may be the same as or different from the luminescent color C or the luminescent color D, which has a very special effect, for example, in FIG.
  • the luminescent color of the luminescent material is C
  • the irradiation angle of the excitation light is changed, and the fiber has a visual effect of shortening the length from the length.
  • the luminescent material 1 or the other luminescent material 3 in the above embodiments is distributed in the cross section of the anti-counterfeit fiber, two or more luminescent colors may be simultaneously provided in one cross section, for example, red and blue two-color, red and yellow two-color, etc. Wait.

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Abstract

La présente invention concerne une fibre fluorescente protégée contre la falsification et matériau protégé contre la falsification dont la modification du caractère de vision est entraînée par une modification d'angle de lumière excitée. Une fibre unique protégée contre la falsification comporte au moins deux parties de matériau, qui sont distribuées sur la section transversale et sont parallèles à la direction longitudinale de la fibre. Ces parties présentent des caractères optiques différents. La distribution sur la section transversale d'au moins deux parties constitue cette partie ou une structure de blindage partielle ou complète pour interdire la pénétration de la lumière excitée est formée entre les deux parties et permet la présence d'au moins deux angles incidents A et B sur la fibre protégée contre la falsification. Lors de l'irradiation de la lumière excitée provenant de A ou B, l'effet de vision est différent. Suite à l'ajout de la fibre protégée contre la falsification du matériau protégé contre la falsification, la couleur luminescente va se modifier lorsque l'angle incident de la lumière excitée est modifié.
PCT/CN2007/070590 2006-08-30 2007-08-30 Fibre fluorescente protégée contre la falsification et matériau protégé contre la falsification dont la modification du caractère de vision est entraînée par une modification d'angle de lumière excitée WO2008034381A1 (fr)

Applications Claiming Priority (2)

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CN200610112693 2006-08-30
CN200610112693.9 2006-08-30

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WO2008034381A1 true WO2008034381A1 (fr) 2008-03-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009105970A1 (fr) * 2008-02-29 2009-09-03 Sun Xianlin Fibre fluorescente anti-contrefaçon et matériau anti-contrefaçon dont le caractère visuel change en fonction du changement d’angle de la lumière d’excitation
EP2946139B1 (fr) 2013-01-17 2020-07-08 Spectra Systems Corporation Revêtement dissimulé pour l'authentification de documents

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GB2300596A (en) * 1995-05-10 1996-11-13 Portals Ltd Fluorescent security feature for cheques and banknotes
CN1210908A (zh) * 1998-09-07 1999-03-17 中国纺织大学 并列双组份复合多孔型中空立体卷曲纤维的制备
CN1412355A (zh) * 2002-10-25 2003-04-23 东华大学 双波长荧光复合纤维及其制造方法和应用
CN1503859A (zh) * 2001-02-21 2004-06-09 ����Τ�����ʹ�˾ 安全制品
CN2763334Y (zh) * 2005-01-05 2006-03-08 孙显林 一种防伪纤维
JP2006063462A (ja) * 2004-08-25 2006-03-09 Toppan Printing Co Ltd 偽造防止用紙およびこれを用いた偽造防止媒体
US20060093821A1 (en) * 2002-09-16 2006-05-04 Spinks Gary D Rainbow fibres
CN1782232A (zh) * 2004-09-24 2006-06-07 孙显林 分布有印刷无法模仿其视觉特征的防伪纤维的防伪材料

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Publication number Priority date Publication date Assignee Title
GB2300596A (en) * 1995-05-10 1996-11-13 Portals Ltd Fluorescent security feature for cheques and banknotes
CN1210908A (zh) * 1998-09-07 1999-03-17 中国纺织大学 并列双组份复合多孔型中空立体卷曲纤维的制备
CN1503859A (zh) * 2001-02-21 2004-06-09 ����Τ�����ʹ�˾ 安全制品
US20060093821A1 (en) * 2002-09-16 2006-05-04 Spinks Gary D Rainbow fibres
CN1412355A (zh) * 2002-10-25 2003-04-23 东华大学 双波长荧光复合纤维及其制造方法和应用
JP2006063462A (ja) * 2004-08-25 2006-03-09 Toppan Printing Co Ltd 偽造防止用紙およびこれを用いた偽造防止媒体
CN1782232A (zh) * 2004-09-24 2006-06-07 孙显林 分布有印刷无法模仿其视觉特征的防伪纤维的防伪材料
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009105970A1 (fr) * 2008-02-29 2009-09-03 Sun Xianlin Fibre fluorescente anti-contrefaçon et matériau anti-contrefaçon dont le caractère visuel change en fonction du changement d’angle de la lumière d’excitation
JP2011514937A (ja) * 2008-02-29 2011-05-12 ソン、 シャン リン 光学色が励起光の照射角度によって変化する蛍光偽造防止線維および偽造防止材料
EP2946139B1 (fr) 2013-01-17 2020-07-08 Spectra Systems Corporation Revêtement dissimulé pour l'authentification de documents

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