RU2331725C1 - Method for manufacturing bond paper protected from forgery and such bond paper - Google Patents

Abstract

FIELD: textile, paper.

SUBSTANCE: method refers to manufacture of bond paper protected from forgery, using polymer thread with figured edge as a protective element. The thread consists of central core and side elements shaped as wings. The polymer metallised thread with figured edge is implemented into the paper during the process of its manufacturing in the mold of the papermaking machine. Then follows dehumidification of the product along with layer forming and its pressurising. The thread is strained during implementing into paper. The thread strain provides creation of fibers on the surface of central core in the wings area. This provides voluminosity of the protective element.

EFFECT: bond paper protection enhancement.

9 cl, 3 dwg

Description

The invention relates to a method for manufacturing a security paper, protected from counterfeiting by means of a polymer thread with a curly edge, inserted into the paper during its production on a mesh cylinder of a paper machine.

A known method of manufacturing security paper, protected from counterfeiting, described in patent RU 2240926, which consists in introducing into the paper during its manufacture on a mesh cylinder of a paper machine a thread with a curly edge having a central zone and side elements in the form of wings. A security thread of a polymeric material with a curly edge is inserted into the paper so that its core is in the paper or extends to the surface of the paper, while the wings can be both on the surface of the paper and inside it.

The present invention is a further development of the above technical solution and is aimed at improving the protective properties of a thread with a curly edge made of a polymeric material, including metallized film material.

The technical result of the invention is to improve the quality of paper protection against counterfeiting due to the proposed method for producing paper with a protective thread with a curly edge, having longitudinal corrugations formed by tensioning the thread when it is inserted into the paper, located on the surface of the central core in the region of the wings and periodically repeated along the length of the protective element.

The specified technical result is achieved by the fact that in the method of manufacturing a security paper, which consists in introducing a security element in the form of a polymer thread with a curly edge having a central core and side elements in the form of wings, onto a mesh cylinder of a paper machine and subsequent dewatering when forming a layer of paper mass and its pressing, according to the invention, when the filament is introduced into the paper, it is tensioned to provide corrugation on the surface of the central core, preserving yayuschih its shape in the paper.

Corrugations form periodically along the entire length of the protective element.

Corrugations form on the central core in the area of the wings.

At least one corrugation is formed on the central core in the area of each of the wings.

Corrugations have a longitudinal direction.

The core of the bobbin thread is placed completely on the surface of the paper or with a partial exit to the surface in the form of windows.

The protective element is performed with colored, luminescent, magnetic, color-variable coatings, demetallized elements, as well as holograms, cinemagrams, optically variable systems.

The security element has machine-readable security information made by printing or demetallization.

Security paper is made according to this method.

A method of manufacturing a security is as follows.

A method of manufacturing a security paper includes the step of introducing a security element in the form of a polymer thread with a curly edge, for example, from polyethylene terephthalate material, including metallized onto the grid of the mesh cylinder of the paper machine, carried out with the tension of the thread using the filing unit.

The operating mode of the filament supply unit is regulated in such a way as to provide, in addition to a certain position of the filament in the paper pulp, the necessary tension of the central core of the filament to form deformed sections in the form of corrugations that retain their shape in paper.

The width of the security element used in the proposed method for manufacturing a security is from 3 to 10 mm, the width of the central core is from 1 to 5 mm, the width of the side elements in the form of wings located symmetrically and / or asymmetrically relative to the longitudinal axis of the core, placed with regular and / or irregular intervals, is from 1 to 5 mm.

The width of the corrugations formed is from 0.2 to 2.0 mm, the length is not more than the width of the wing of the thread with a curly edge, which is from 1 to 5 mm.

To ensure adhesion to the paper, the thread has adhesive layers on at least one side. The adhesive layers may also contain luminescent, color, color alternating, electrically conductive, magnetic, polarizing additives that increase the protective effect of the proposed protective element.

When a security element is introduced into the paper according to this method, the core of the bobbin thread can be located completely on the surface of the paper or with a partial exit to the surface in the form of windows. In the process of forming a layer of paper pulp with a protective element inserted into it and subsequent pressing, dehydration occurs to obtain the finished product - paper with a protective element in the form of a thread with a curly edge, having one or more longitudinal corrugations parallel to the surface of the central core in the area wings.

The security thread may carry visually controlled or machine-readable security information made by the printed method and / or the demetallization method.

The use of additional security features in the design of the security element used in the proposed method for manufacturing a security paper, such as colored and / or luminescent, and / or magnetic, and / or electrically conductive and / or color-changing materials, diffraction gratings and / or holographic images formed on a multilayer tape made of a polymeric material, can also increase the security of printing products.

Colored and / or luminescent materials can be located both on the surface of the protective element and in the thickness of the polymer film, in the case of special manufacture of the starting polymer material to obtain films.

Luminescent substances can be introduced into the adhesive layer of the protective thread, and it is possible to introduce luminescent substances having different colors under UV irradiation on opposite sides of the thread, which creates a pronounced visual sign of authenticity.

A colorful luminescent coating and / or image on a tape security element may be made on the basis of one or more luminescent substances. Luminescent pigments used to create an additional security feature can be either visually visible or machine readable.

The invention is intended to be used as a method of obtaining a security against tampering. This security element allows visual verification of the authenticity of security printing products and is a difficult to reproduce element in the manufacture of fakes.

The security paper is performed according to the proposed method.

The essence of the method is illustrated by the following drawings.

Figure 1 - shows a paper with a protective element with a curly edge and corrugations on the surface of the central core in the region of the wings, obtained in accordance with the proposed method.

Figure 2 - shows a cross section aa of the protective element with side elements and corrugations in the region of the central core.

Figure 3 - shows a diagram of the introduction of a protective element with a curly edge into the paper on a paper machine.

Figure 1 shows the appearance of a security element 1 with a curly edge located in paper, consisting of wings 2, a central core 3 having corrugations 4, formed by pulling a thread with a curly edge in the process of introducing it into the paper.

Figure 2 shows a cross section of a protective element 1 having corrugations 4 formed in the region of the central core. The protective element is made of two polymer films 5 and 6, one of which has a metal layer 7, interconnected using glue for duplication 8 and having a protective 9 and adhesive layers 10, deposited on one or both surfaces of the protective thread.

Figure 3 shows a diagram of the introduction of the protective element with a curly edge 1 when it is tensioned using the filament feeding unit 11 onto the mesh 12 of the mesh cylinder 13 of the paper machine and subsequent dewatering when forming a layer of paper pulp 14 in the bath 15 and pressing, followed by drying. Position 16 shows the water level, position 17 - the flow of mass, position 18 - overflow.

The advantage of this protection method is that when trying to falsify it is almost impossible to create corrugations in the core region without providing the required thread tension during the filing of the security paper during the manufacturing process.

Industrial applicability.

The invention can be used in the manufacture of securities.

Claims (9)

1. A method of manufacturing a security paper, which consists in introducing a security element in the form of a polymer thread with a curly edge, having a central core and side elements in the form of wings, onto a mesh cylinder of a paper machine and subsequent dehydration when forming a layer of paper pulp and pressing it, characterized the fact that when the filament is introduced into the paper, it is tensioned, which ensures the formation of corrugations on the surface of the central core that retain their shape in the paper. 2. The method according to claim 1, characterized in that the corrugations form periodically along the entire length of the protective element. 3. The method according to claim 1, characterized in that the corrugations form on the central core in the region of the wings. 4. The method according to claim 1, characterized in that they form at least one corrugation on the central core in the region of each of the wings. 5. The method according to claim 1, characterized in that the corrugations have a longitudinal direction. 6. The method according to claim 1, characterized in that the core of the bobbin thread is located completely on the surface of the paper or with a partial exit to the surface in the form of windows. 7. The method according to claim 1, characterized in that the protective element is made with colored, luminescent, magnetic, color-variable coatings, demetallized elements, as well as holograms, cinemagrams, optically variable systems. 8. The method according to claim 1, characterized in that the security element has machine-readable security information made by printing or demetallization method. 9. Security paper made according to the method according to any one of claims 1 to 8.

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