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

• the object of the present invention relates to a security paper or special paper that incorporates high strength synthetic elements
• These synthetic elements incorporated in the security paper or special paper are usually conferred different qualities such as being fluorescent, phosphorescent, luminescent, with magnetic characteristics, etc., characteristics that are visible to the naked eye or that are observable under certain conditions , such as under ultraviolet light, magnetic sensors, etc.
• the manufacturing process of the fibrils is generally carried out by obtaining in an extrusion row of extremely fine filaments that are cut to a certain length.
• pigments which are those that offer the desired characteristics of fluorescence, phosphorescence, luminescence, magnetism etc., these pigments being given after the manufacture of such fibrils, so that the aforementioned are superficially impregnated fibrils
• the pigments that are usually used can be basically of two types, pigments of inorganic base, whose main characteristic is that of offering a good resistance to preserve the fluorescent, phosphorescent, luminescent, magnetic properties, etc. although it is the one that offers a poor intensity of the response.
• the second type of pigments that can be used are organic-based pigments and have poor resistance, with little effect, but nevertheless they offer a good intensity in their response.
• These elements for incorporation in the papermaking process, are prepared in the form of a water suspension that is contributed to the papermaking process, being embedded inside the paper at different randomly arranged depths.
• a security paper or special paper that, based on the technology referred to above, incorporates internally synthetic elements to which pigments are provided, and they are fluorescent, phosphorescent, luminescent, magnetic, etc., which confers safety features, that such pigments are highly resistant to the detachment of the synthetic elements themselves and that they are easily integrated into the manufacturing process of a security paper or special paper with which security or special documents are manufactured such as banknotes, bills of exchange, security labels, etc.
• a security or special document be it bank note, bill of exchange, security label, etc. which has as support this security paper or special paper that integrates synthetic elements whose quality is being highly resistant to the wear factors of the document itself without altering its characteristics.
• the pigment introduced into the formation mass of the synthetic element will be protected by the material of the element itself, preventing it from wear due to rubbing and being protected from attacks by physical and chemical agents that the security document and light may suffer, Therefore, the characteristics incorporated in the pigments remain unchanged over time.
• the material of these synthetic elements that allows the integration of the pigments in their mass without their deterioration is not viscous or polyamide but polypropylene and has the difficulty of being a material that does not have hydrogen free radicals and is therefore a product that does not show affinity with the water that surrounds it, that is to say, it is not impregnated in water of the aqueous solution in which it is found, causing the caking of the synthetic elements and not thereby giving a homogeneous dispersion of these in the water.
• aqueous solution has been achieved in which the dispersed synthetic elements are found without caking, with the addition of dispersants and / or penetrants and / or defoamers in the appropriate proportion.
• a procedure to incorporate the synthetic elements with this material is to achieve a dispersion of water and synthetic elements that is kept under stirring.
• dispersing products and / or penetrating and / or antifoaming products are added in suitable proportions, thus avoiding the caking of the synthetic elements.
• the Dispersion is prepared in various loading and homogenization tanks prior to pumping to the paper production circuit in the machine.
• Figure 1 shows an enlarged section of a paper that incorporates in mass this type of synthetic elements as shown by the invention.
• Figure 2 also represents an enlarged sectional view of a paper incorporating the synthetic elements of the invention in a band.
• Figure 3 represents a schematic diagram of the preparation tanks of the aqueous solution of synthetic elements before being introduced into the papermaking machine.
• Figure 1 shows an embodiment of a security paper or special paper (3) that has the mass elements integrated in mass, in this case in the form of fibrils (1), of the invention, as is the case in a traditional embodiment of the state of the art, achieving that despite being made of such polypropylene fibrils that do not have an affinity for water, such fibrils do not get caked or retained superficially in the paper itself, but are distributed randomly within the formed paper .
• Figure 2 is a variant embodiment of a security paper or special paper (3), in which the synthetic elements of the invention, in this case again in the form of fibrils (1) can be integrated into bands (4), by means of controlled insertion techniques of such fibrils within the paper at the time of its manufacture, controlling the depth at which such bands of fibrils are introduced, being able to be superficially or embedded inside the paper thus formed.
• Figure 3 represents a schematic diagram of the process of preparing the aqueous solution of the synthetic elements, in which they are initially conditioned in an aqueous dispersion in a tank (5), to which are added in addition to the synthetic elements and Ia aqueous suspension base thereof, an amount of dispersants and / or penetrants and / or defoamers in suitable proportion, said suspension being subjected to stirring.
• the dispersion thus prepared passes to a homogenization stage (6) and, subsequently, is dosed by appropriate pumps (7) towards the entry into the papermaking machine (8) to integrate such synthetic elements in bulk or in a controlled manner.
• POLISAL ® is an aqueous solution of a yellowish sodium polyacrylate with an approximate density of 1.3 gr / cm3, being a very active product for the dispersion and refining of pigments used in the paper industry, especially for pigments of stucco.
• the AMP-90 ® dispersant is an aqueous solution of 2-amino-2-methyl-1-propanol.
• This dispersant is colorless with relatively low viscosity and remains liquid at quite low temperatures such as - 37 0 C Io which allows easy and proper handling in industrial facilities.
• This product is a very efficient dispersant for pigments in plastic paints and, as a fatty acid salt, emulsifier in immiscible water-liquid systems. It also provides pH stability, low odor and anti-corrosive properties, even increases the acceptance of universal dyes.
• the density of this product is 0.949 gr / cm3 at 25 0 C.
• NOPCOWET LO ® is a synergistic mixture of wetting surfactants and detergents such as Alkyphosphate and potassium salt, which in the alkaline bleaching process facilitates the uniform impregnation of the bleach in the entire mass to be treated, facilitating Ia removal of waxy compounds that cover the fibers.
• AFRANIL MG ® of the BASF firm
• BASF firm which is a mixture of aliphatic hydroxide compounds in aqueous emulsion. It has a density of approximately 0.960 gr / cm3 and pH of approximately 9.
• This product has a good deaerating effect of the mixtures where it is inserted presenting as an advantage that the water-repellent impurities do not accumulate, that is to say it has a dispersing effect.
• the differences may vary depending on the color of the pigment or type of response expected but always with an improvement on the state of the current technique.

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• 2005
  • 2005-04-06 PT PT05731849T patent/PT1887132T/pt unknown
  • 2005-04-06 US US11/911,080 patent/US20090020245A1/en not_active Abandoned
  • 2005-04-06 WO PCT/ES2005/000179 patent/WO2006108886A2/es active Application Filing
  • 2005-04-06 PL PL05731849T patent/PL1887132T3/pl unknown
  • 2005-04-06 EP EP05731849.5A patent/EP1887132B1/en active Active
  • 2005-04-06 CA CA002603937A patent/CA2603937A1/en not_active Abandoned
  • 2005-04-06 BR BRPI0520336-8A patent/BRPI0520336B1/pt active IP Right Grant
• 2007
  • 2007-10-08 EG EGPCTNA2007001072A patent/EG26465A/en active

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