PT106145B - INTERACTIVE PANELS OF BIODEGRADABLE SUPPORT AND RESPECTIVE PROCESS OF OBTAINING - Google Patents

Abstract

The present invention relates to interactive and personalized publicity and propagandatic posters and the successful rendering process. THE INTERACTIVITY OF THESE POSTERS MANIFESTS THROUGH COLOR CHANGE, THAT BY MEANING ENVIRONMENTAL OR INDUCED TEMPERATURES, THE COLOR TONE CHANGES THROUGH THE MICROENCAPSULATED CHAMELECOTIC PIGMENTS AND THE MICROENCAPSULATED THERMOCROMATIC LIQUID CRYSTALS. THESE MODIFICATIONS CONFER TO THE POSTER THE POSSIBILITY OF TRANSMITTING THE MOST VARIOUS MESSAGES THROUGH A CERTAIN TIME PERIOD. The method includes the preparation of the bio-conductive support, the obtaining of the bio-conductive inks with microcapsules, the obtaining of the microcapsulated liquid crystals, the application of the inks developed in the starch carrier by spraying and the development of the chromatic stimulation device.

Description

INTERACTIVE BIODEGRADABLE SUPPORT PANELS AND THEIR OBTAINING PROCESS

FIELD OF THE INVENTION

The present invention describes interactive panels with the ability to broadcast multiple messages in a single copy, produced by using thermochromic liquid crystal inks and biodegradable microencapsulated pigments, which vary in color by different factors, whether intentionally or unintentionally, over a biodegradable support, applied by spray-stamping process.

The invention has preferred application as a publicity poster or street political propaganda.

BACKGROUND OF THE INVENTION

The articulation between regulatory compliance and profitability with the desire to contribute to minimize the environmental impact caused by the current coated textile media used in advertising and electoral campaigns, was the basis of the present invention.

Hundreds and hundreds of square meters of polyvinyl chloride (PVC) coated polyester fabric (PES) are printed, with large advertisements, to be affixed to facades, gables or walls, located at strategic locations. In addition to the fact that this situation is unlawful if the advertisement is placed in a place not intended for this purpose, this situation results in a serious waste treatment problem, as the vast majority of PVC-coated polyester is landfilled. .

In Portugal, the use of non-biodegradable materials for the registration of publicity and political propaganda messages is prohibited, pursuant to Article 4 (2) of Law No 97/88 of 17 August, as amended by Law no. 23/2000 of 23 August. However, the absence of harmless solutions may be one of the reasons given for non-compliance, because, despite its high environmental harmfulness, the material used is still PVC coated polyester fabric.

In addition to the illegality and environmental harmfulness of current media, particular emphasis is given to the monetization of advertising space. Today, this is based on changing the message over time, essentially using electronic or mechanical systems.

The rotating panels (sliding or using a prismatic mechanical system) provide the display of different advertising messages in the same space, alternately. An example of this type of media is described in GB956782. However, turnover implies the presentation of new content, which makes it impossible to change only certain graphic elements of the ad.

Other systems offer alternate diffusion of information, such as light-emitting diode (LED) panels. These monitors function primarily as advertising media for the dissemination of different dynamic content, as mentioned, for example, in document CN20062015248U. However, these devices have a short average life, taking into account the long and demanding daily activity, and require regular maintenance, in some cases repairs that can become costly.

WO2006124416A2 refers to a system consisting of several rectangular shaped monitors arranged around a main screen for broadcasting sports competitions. The invention relates to the programmed broadcasting of messages or advertisements. As mentioned in the previous invention, these devices also become costly, considering the need for repair and maintenance.

The use of pigments that, under certain atmospheric conditions (temperature and intensity of ultraviolet rays), change the color of the advertising message, is suggested in document PT 103928. The application of these pigments is made by the digital printing process through the Michelangelo Reproductive System printer. , using a large-format digital playback system that is little used in the market, taking into account technological advances and the achievement of better results,

about everything at the That say respect to resolution, speed and quality gives print For another hand is employed an typology in pigment by solution and if it is in

thermochromes with a specific temperature range only. This inevitably leads to the need to print several times on the same media, according to the desired color effect, resulting in increased costs. As pigment deterioration occurs when exposed outside, a clear film is applied post-stamping to protect against degradation, making this process even more expensive. However, the different behavioral response to the atmospheric conditions of the materials should be highlighted. In that document, the paint is applied on PVC coated polyester. Because it is a support having a hydrophobic coating layer with low adhesion force, the prior use per roll of a lacquer layer was the solution described in the invention to circumvent the adhesion and drying problem of the paint. Situation that makes the printing process more expensive and time consuming.

Today, despite the European Union Directives and Law No 97/88 of 17 August (as amended by Law No 23/2000 of 23 August), the material used for the printing of the Medium and large format street is the PVC coated polyester fabric - the same support tested in the aforementioned invention. In particular, polyester fabric is characterized by its low elasticity and high tear and tear resistance, good hydrophobicity and resistance to chemical agents, especially organic acids in dilute concentrations. However, for applications that are subject to harsher conditions or prolonged exposure, the fabric is covered with an additional layer of PVC.

In its pure state, PVC is a rigid material, electrical insulator, highly resistant to liquids and chemicals. However, it presents high instability to ultraviolet light (UV) and thermal degradation (from 130 ° C), leading to the release of chlorine as

HCl. To minimize this situation, additives are combined with their formulation, called stabilizers. Based on heavy metals such as lead, barium, cadmium, zinc, calcium and tin, these additives react directly with HCl, conferring properties that nullify or retard polymer degradation. To make PVC flexible, low molecular weight compounds called plasticizers are added to it. However, the use of these additives presents serious problems for the environment as well as for public health. In 2000, the Commission of the European Communities published a study revealing disquieting data on the damage caused by these materials: reproductive and immune system damage or endocrine dysfunction. These effects are even more disturbing if the accumulation and persistence of some of these substances in the body is taken into account, even if only their contamination in the production and waste treatment phases is considered.

The present invention then emerges as a response to the urgency of developing advertising and advertising solutions without any harm to the environment and which, in parallel, are capable of creating impact and arousing interest in the public. In this sense, this invention is different from those presented as it is a process, with external application, that includes: l) a biodegradable support; 2) at least one environmentally friendly chromatic solution that provides the chromatic alteration of the advertising and advertising message, and furthermore, 3) a programmable device that guarantees the desired color variation.

Although the use of chromatically stimulatable materials on different substrates is already known, such as photochromic pigments applied to children's toys, such as EP 1 415 692 Al, or thermochromic pigments in damp or liquid environments such as for example in US 2006/0232059 Al or even the microencapsulated liquid crystals inserted in a temperature-indicating holder suitable for example to be an advertising calendar described in ES 2,146,164 Al, the invention differs from all the referenced processes, as it is an integrated and dynamic product, since it combines various technologies, such as thermochromic pigments and liquid crystals on the same support, of intentionally stimulating biodegradable character, providing alteration of the visual message through the chameleon effect.

The aim of the present invention is to provide a complete and environmentally friendly solution for application in street advertising or political advertising in order to comply with current legislation and to provide monetization of advertising and propaganda space through chromatic variation over time. of time on the same support.

SUMMARY OF THE INVENTION

It is an object of the present invention to describe biodegradable interactive panels comprising:

The. Biodegradable support comprising three layers being two polymeric and one textile;

B. Ink;

W. Chromatic stimulation device coupled to the biodegradable support.

In a preferred embodiment of the present invention, the interactive panels feature an ink comprising at least two microencapsulated thermochromic pigments that may be temperature sensitive, UV radiation, phosphorescent or invisible.

In another preferred embodiment of the present invention, the interactive panels comprise an ink comprising microencapsulated liquid crystals.

In yet another preferred embodiment of the present invention, the interactive panels comprise an ink comprising at least two microencapsulated thermochromic pigments and microencapsulated liquid crystals.

In a preferred embodiment of the present invention, the interactive panels have a biodegradable support comprising natural or artificial cellulosic fibers and natural or modified cornstarch polymers, vegetable oils and biodegrade synthetic polyesters.

In another preferred embodiment of the present invention, the interactive panels feature a fabric used in the biodegradable support consisting of interweaving of natural and artificial cellulose fibers (especially bamboo) and warp yarns and a regular enlarged taffeta web and the web that applies the bandages so that they are two in both the web and web direction.

In yet another preferred embodiment of the present invention, the interactive panels use a cornstarch-based polymeric layer, vegetable oils and biodegradable synthetic polyesters of 50 to 150 µm thickness.

In a preferred embodiment of the present invention, the interactive panels have a textile substrate overlay.

In another preferred embodiment of the present invention, the interactive panels have a textile substrate covering comprising the following steps:

- Preparation and organization of materials by layers;

- Application of a non-stick paper, outer layers;

Submission of the layered material surrounding it at certain pressure, temperature and velocity conditions, preferably with a pressure of 0.1 MPa, a temperature of 180 ° C and a velocity of 2 m / min;

The composite, still wrapped in non-stick paper, cools for 3 to 5 minutes until it reaches room temperature.

In yet another preferred embodiment of the present invention, the interactive panels feature a thermochromic pigment ink comprising pigments with a diameter of less than 20pm.

In a preferred embodiment of the present invention, the interactive panels feature a microencapsulated liquid crystal paint containing a concentration of 33% to 40% solids content.

In another preferred embodiment of the present invention, the interactive panels feature microencapsulated liquid crystals comprising a size between 10 and 15pm.

In yet another preferred embodiment of the present invention, the interactive panels feature a stimulation device comprising temperature sensors, resistors, sympathet (6), rheostat, zinc plates (2,

3) or nickel-chromium wire and component fixing panel.

In a preferred embodiment of the present invention, the interactive panels feature a stimulation device which further comprises a photovoltaic system in turn comprised of a photovoltaic module, charge regulator and accumulator battery.

In another preferred embodiment of the present invention, the interactive panels feature a liquid crystal film in place of the paint.

It is a further object of the present invention to describe a process for obtaining biodegradable interactive panels comprising the following steps:

(a) preparation of biodegradable support;

b) Obtaining biodegradable ink with microencapsulated pigments;

c) Obtaining the ink of microencapsulated liquid crystals;

d) Application of the developed inks on the support by spray-stamping;

e) Application of the chromatic device.

of stimulation

In a preferred embodiment of the invention, the process comprises in the preparation of the biodegradable support the selection and constituting layers of the lamination coating, the preparation of the different biodegradable support and the heat and pressure, using a device that performs the bonding of the film to the textile substrate, with the particularity of covering both sides simultaneously.

In another preferred embodiment of the invention, the process comprises, in obtaining the biodegradable ink with microencapsulated pigments, the following steps:

a) Selection of particle size materials

less than 2 Ogm, between the sensitive pigments The temperature, The radiation UV, phosphorescent or invisible; b) Mixture of pigments with biodegradable varnish at

proportion of 1 part pigment to 5 part varnish, supported by a rotary motorized mechanical instrument;

c) Filtration of the solution using vacuum filtration to remove pigments having a diameter greater than 20 gm.

In yet another preferred embodiment of the invention, the process for obtaining crystal paint comprises the following steps:

a) Selection of the paste solution with a microcapsule diameter between 10 and 15 gm and concentration of about 33% of the solids content;

(b) mixing with a binder in the ratio 1 part alcohol to 1 part liquid crystal paste supported by a rotary motorized mechanical instrument;

c) Addition of a UV protector at a concentration between 2% and 10%, more specifically 8% and mixing with a rotary motorized mechanical instrument.

In a preferred embodiment of the invention, the alcohol used in process step b) is glycerol.

In another preferred embodiment of the invention, the process comprises the following steps:

a) Spraying on the mold, with spray gun support for painting at a distance of approximately 300 / 400mm, the pigmented paint and drying at room temperature for a period of 15 minutes;

b) Mold removal;

c) Filling with dark colored paint, preferably black, in the area where liquid crystal paint will be applied;

d) Spraying on the mold, with spray gun support for painting at a distance between 150 to 200mm;

e) Drying at room temperature for 20-30min;

f) Mold removal.

GENERAL DESCRIPTION OF THE INVENTION

The present invention is intended to be an effective response to the need to reduce the impact on the environment as a result of current advertising and political advertising media, in particular PVC-coated polyester fabric, a situation provided for by Law No. 97/88 of 17 August (as amended by Law No 23/2000 of 23 August) and which is not fulfilled.

Accordingly, three distinct steps are presented which form the development of the solution presented in the present invention: the development of the biodegradable support; the design and printing with biodegradable ink with chameleonic pigments and / or a liquid crystal solution and finally the reusable and recyclable stimulation device.

The first step was the elaboration of the biodegradable support. This consists of two materials: fabric and film. The fabric is responsible for imparting physical stability, ie, it is the structural component of the composite which gives it good mechanical toughness, dimensional stability and elongation capabilities. The film, arranged in the outer layer, ensures the protective function, ensuring impermeability to liquids and gases, as well as allowing a proper printing. The set (fabric and film) allows to combine two important factors when placing the support outside: resistance and protection. This support has three layers: two (identical) polymeric and one textile. Natural and artificial fibers are used in their production as well as natural or naturally modified polymers, preferably composed of cornstarch, vegetable oils and biodegradable synthetic polyesters.

As a second step comes design and printing. The design of the advertising or advertising piece is particularly important in view of the visual variation of the composition obtained from the use of pigments and liquid crystals. Given the peculiarity of these materials, the idealization of the visual message, namely image, vectors and text, considers the color variations and reaction behaviors of each material involved, in order to create pieces with high visual impact, combining creativity, technology. and the temporality.

The printing component comprises the development of ink with thermochromatic chameleonic pigments and liquid crystal solutions, which are responsible for the chromatic variation of visual contents.

To produce ink with pigments, which may be temperature sensitive or UV radiation, phosphorescent (also called luminescent), or invisible, a SunChemical® certified AQUABIO 11965 certified biodegradable varnish is used in the printing industry. , based on acrylic resins, additives and wax. This varnish serves as a vehicle for transporting the pigment, since it optimizes the homogenization and stabilizes the solution. On the other hand, it ensures the pigment's adhesion to the substrate and ensures the resistance of the print to degradation factors, as it has UV protection. These pigments should be less than 20pm in size.

At a minimum, two different color and temperature range thermochromic pigments should be used, maximizing the range of visual possibilities. Each print can then have four states if three distinct color and temperature sensitivity pigments are used. Take as an example: adding a 10 ° C magenta thermochromic pigment + a 31 ° C blue thermochromic pigment + a 50 ° C yellow thermochromic pigment to the same solution gives the following color combination: colorless if> 50 ° C; yellow in the range 31 ° C to 50 ° C; green if <31 ° C; brown if <10 ° C.

The ink formulation requires the solution to remain homogeneous, with adequate viscosity and no pigment accumulation leading to clogging of the application instrument or product concentration in certain areas of printing. For this, it is necessary to measure the behavior of the paint, based on different formulations:

D 3 pigments + water addition + AQUABIO 11965, gives SunChemical®; 2) 2 pigments + water addition + AQUABIO 11965, gives SunChemical®; 3) 3 pigments + AQUABIO 11965 from SunChemical®; 4) 2 pigments + AQUABIO 11965 from SunChemical®.

Formulations without added water show superior performance with regard to ink adhesion and spreading in terms of print media and mode of use.

The application of the solution on the support uses the process of stamping by spraying through the airbrush or spray gun.

Prior to spraying over the holder at the appropriate distance, the developed paint should be filtered so as to trap particles larger than 20 pm that could clog the spray gun nozzle.

Paint can be dried at two different drying speeds: oven and room temperature. In the oven drying process a temperature of 120 ° C for 6 min is recommended, while at room temperature the drying time is approximately 15 min.

Ensure that what the power coating of substrate developed, not existing in fixing and at drying of

The adhesion of textile material is suitable for ink so any pigment difficulty. Accordingly, no surface treatment is required to prepare the material for ink reception.

Subsequently microencapsulated liquid crystals are applied to the places of the biodegradable support where the pigments are not present. Preferred liquid crystals are cholesteric structural type liquid crystals, because they express different optical refractive indices and provide remarkable iridescent capacity, reacting to thermal changes through color variation. After thermal stimulation, iridescent colors only become visible by selective reflection of incident white light. Thus, in order to obtain better visualization results of the chromatic effects, the liquid crystals are applied on a dark background, preferably black. The color variation observed is as follows: colorless, red, green, yellow, blue and black as the temperature increases. Microencapsulated liquid crystals are applied either as 33% or 40% solid paste or self-adhesive Mylar polyester film, between 175-225pm thick and standard size 30x45cm. These iridescent materials react within an exact temperature range. [20-41 ° C]; [25-44 ° C; [30-46 ° C]; [35-49 ° C] and [40-52 ° C], with a bandwidth between red and blue, which can be 1 ° C or 5 ° C ensuring visual change of graphics from of thermal stimulation. Presentation of the slurry product requires the addition of an aqueous solution, such as water, glycerol or glycol, providing its dissolution and application on the support by the spray-stamping process. The polyester film, on the other hand, requires a study on the preparation of graphic elements, and it is necessary to use specific computer applications for graphic design and advertising for the creation of visual contents, to be cut in the liquid crystal film.

The use of the poster is preferably for outdoor use. In such cases, a UV stabilizer should be added to the pigment ink and the liquid crystal solution and, when using the liquid crystal polyester film, to add UV protection, for example by applying the biodegradable varnish by spraying it on. it is.

After the idealization and printing of the visual message, taking into account the specificities associated with the mentioned pigments and liquid crystals, the development of a programmable electric thermo phase device that provides the desired color change.

recyclable

Produced from reusable material and powered by a photovoltaic panel, the apparatus is adapted, weighing the desired effect, and may preferably include zinc sheets (2), (3), temperature controllers (4), sensors of temperature, resistances and simostat (6). Tests carried out using nickel-chromium wire of different thicknesses were equally satisfactory, taking into account the range of chromatic variety and visual effects achieved.

In a preferred embodiment, the ink of the thermochromic pigments is not applied to the biodegradable support.

In another preferred embodiment, liquid crystal paint is not applied to the biodegradable support.

In another preferred embodiment, the liquid crystal paint is replaced with a liquid crystal film.

Brief Description of the Figures

For an easier understanding of the invention, attached are figures representing preferred embodiments of the invention which, however, are not intended to limit the scope of the present invention.

Figure 1 is a schematic of the chromatic variation of the advertisement resulting from the chromatic changes to the ad graphics where A corresponds to phase 1, B to phase 2 and C to phase 3, comprising the microencapsulated thermochromic pigments in the THIS IS GREEN and because it is biodegradable. and the microencapsulated liquid crystals presented on self-adhesive polyester film in the form of plane tree.

Figure 2 shows a schematic of the thermoelectric device assembly, representative of the developed programmable stimulation device in which the reference numbers indicate:

- plywood board;

- 440x320mm zinc plate;

- 300x260mm zinc plate;

- digital temperature controller;

- light switch; and

- statostat.

Figure 3 shows a visual scheme of the advertisement and the chromatic variation range resulting from the desired visual change in the 3 advertisement phases: A-phase 1, B-phase 2, and C-phase 3, supported by a pigment color scheme thermochromatic: (a) mixing yellow 31 ° C with blue 43 ° C and (b) mixing blue blue with 31 ° C and the microencapsulated liquid crystals applied to the plane graphic element (c). When stimulated, k7 corresponds to> 43 ° C; 8 at range] 4331 ° C [; 9 at <31 ° C; 10 to> 31 ° C; 11 at <30 ° C; 12 to 30 ° C; 13 to

33 ° C.

Detailed Description of the Invention

The present invention consists of chromatically stimulatable interactive biodegradable advertising display panels. Its production comprises the following steps: 1. Preparation of biodegradable support;

2. Obtaining the biodegradable ink with microencapsulated pigments;

3. Obtaining the solution of microencapsulated liquid crystals; 4.Application of the biodegradable ink by stamping with spraying equipment and application of the microencapsulated liquid crystals on the biodegradable support; 5.Development of a color stimulation device.

1. Development of biodegradable support

Similar to the composition of the advertising canvas, the biodegradable support has two polymeric layers and one textile. In fabric composition, preference should be given to interweaving between warp and weft threads of natural or artificial cellulose fibers (especially bamboo). In the textile structure we used a regular enlargement of taffeta to the web and weft, resulting in the enlargement of the ribs that went from one to two in the direction of the weft, as in the direction of the web. For coating, a naturally modified biodegradable polymer based on maize starch, vegetable oils and biodegradable synthetic polyesters, preferably with a thickness of 100 ppm and a melting point of 110 ° C, may be used.

The technique of covering the textile substrate used may be heat and pressure lamination using a device that allows the bonding of the film to the textile substrate, with the particularity of covering both sides simultaneously. The procedure was as follows:

1) Preparation and organization of layered materials: first place the biodegradable film, followed by the fabric, preferably bamboo, and again the biodegradable film;

2) In order to prevent the bonding of the biodegradable film to the thermal equipment, a non-stick paper was used which surrounds the outer layers;

3) The material was then layered under certain pressure, temperature and velocity conditions, preferably with a pressure of 0.1

MPa, a temperature of 80 ° C and a speed of 2 m / min;

4) Finally, the composite, still wrapped in the non-stick paper, cools for 5 minutes until it reaches room temperature.

developed biodegradable support was subjected to the homemade composting biodegradation test.

From

Third week, the material began its biodegradation process involving with the compound.

Na was partially degraded by the action of microorganisms.

2. Obtaining biodegradable ink with microencapsulated pigments

Considering the absence of a paint with these characteristics, it was necessary to develop a solution that had adequate homogeneity, viscosity, drying, adhesion and resistance, particularly to the developed biodegradable support. The ink preparation procedure comprises the following steps:

1) Selecting microencapsulated pigments with a particle size of less than 20 gm to avoid clogging and accumulation of pigment in the spray gun nozzle. Thus thermochromatic pigments or phosphorescent pigments were used;

2) Mixing pigments with certified biodegradable varnish, preferably 1 part pigment (s) to 5 part varnish.

When combining 2 or 3 thermochromic pigments with different temperature range and shades, the color intensity of the pigments reacting at the upper temperature should be less than the intensity of the other pigment reacting at the lower temperature;

3) The pigments were mixed with the liquid solution using a motorized rotating mechanical instrument (eg magic wand), however, for small amounts, the mixture was done manually, with the support of a brush. When the formulation incorporated more than one pigment, the pigment was mixed before the varnish was added;

4) Filtering the solution using vacuum filtration to accelerate the separation process;

5) General evaluation of the paint, taking into account the homogeneity and viscosity so as not to compromise its application and drying.

3. Obtaining Ink from Microencapsulated Liquid Crystals

For liquid crystals in paste form, preferably an aqueous solution with a microcapsule diameter between 10 and 15pm and a concentration of 33% solids content may be used. The concentrated aqueous-based solution can be applied by stamping, or by brush or roller. Formulation in the ratio of 1 part liquid crystal paste to 1 part aqueous binder is recommended, for example an alcohol, preferably glycerol (50-50%).

UV protection is ensured by the addition of a high performance preparation as UV stabilizer for the formulation of water-based paints, varnishes, adhesives and adhesives. Its share corresponded to 8% of the paint, considering the recommended concentration of 2% to 10%. This protector was involved in the preparation until a homogeneous solution was obtained.

Finally, as in the microencapsulated pigment paint developed, the general evaluation was made, taking into account the homogeneity and viscosity so as not to compromise its application and drying.

4. Spray application of thermosensitive pigments at various temperatures and application of microencapsulated liquid crystals on the biodegradable support

With regard to the application of biodegradable ink, the process begins with the separation of the constituent elements of the visual message in which thermochromic pigments and microencapsulated liquid crystals will be employed. For the remaining elements, it is advisable to use digital printing preferably by UV curing, as it is currently the printing process that presents less harmful to the environment.

From the digital file, developed based on specific computer applications, the contents of the graphics are separated by elements, in order to elaborate molds to support the stamping using the spray gun. Subsequently, the molds are cut out either manually or on a cutting plotter, placed on the developed biodegradable support and fixed so that they do not move.

The paint spraying of thermochromic pigments is preferably carried out with a spray gun support having a nozzle diameter of 1.4 mm. The paint is sprayed onto the mold, already fixed to the biodegradable support, at a distance of approximately 300 / 400mm. Thereafter, the drying process is started at room temperature (25-30 ° C) for approximately 15 minutes or in an oven at 120 ° C for about 6 minutes. The operation ensures the adhesion and fixing of the ink to the support. In the final phase, the mold is removed.

Subsequently, the liquid crystal paint was applied by the spray-stamping process using the same spray gun with 1.4mm diameter nozzle, maintaining a distance of 150 to 200mm from the nozzle to the holder. Drying can be performed at room temperature (2025 ° C) for 20-30min. In the final phase, the mold is removed.

Previously, in the area to be filled with liquid crystals, a dark colored base is applied by the fingerprint process, also possible by the spraying process, to ensure better visualization results of the chromatic effects.

If you choose to use a microencapsulated liquid crystal film instead of the crystal solution, the process starts with the elaboration of the digital file of the elements followed by cutting, manually or using a cutting plotter. After cleaning the surface of the holder, the film graphic is fixed in place.

5. Development of a color stimulation device

In order to regulate the stimulation for chromatic variation of pigments and crystals, a stimulation device has been developed that guarantees the desired visual effects by varying the temperature.

This device is standalone and its components are reusable and / or recyclable.

In its constitution incorporates the following material:

(a) temperature controller (4);

b) temperature sensor;

c) resistance;

d) Thermostat (6);

e) switch (5);

f) Rheostat;

(g) sheet of a thermally conductive material placed on the

support, preferably zinc or thread in nickel- chromium (2), (3); h) Base panel for fixation of material (plywood) (1). The two zinc sheets (2, 3) (or the nickel -chromium) are fixed to the board in plywood (D, on site

specific for stimulating chameleonic pigments and liquid crystals applied to the support. Under the plates (2), (3) are placed NiCr tubular resistances between 150W to 400W, according to the desired temperature and reaction time. To provide the chromatic effect, temperature sensor and controller (4), rheostat, thermostat (6) and switch (5) are applied. For effective monitoring, some components are more accessible: temperature controller (4), thermostat (6) and switch (5). The thermal variation of each plate (2, 3) works independently, thus presenting three possible scenarios: plate 1 (2), plate 2 (3) or both simultaneously (2, 3).

To provide electricity, it is also possible to incorporate a photovoltaic system (photovoltaic module, charge regulator and accumulator battery).

printed biodegradable support is applied to the zinc sheets (2, 3); the back is placed in contact with the thermally conductive plates (2, 3), keeping the front (printed side) exposed to the public. The device is programmed to activate at specific temperatures, the temperature controller (4) allows the electric current to pass, which provides uniform heating of the plate via the resistance, consequently causing the chromatic variation of the pigments and liquid crystals. .

The application of the thermostat (6) delays the passage of electric current, ensuring a longer thermal variation, enhancing the color change. This situation is of particular relevance for graphics with liquid crystal application, since the passage from one color to another is continuous.

NiCr wire allows for a color variation limited to the heat generated by the wire itself. This material, being flexible, allows the elaboration of singular and distinct visual contents.

Application Example

In figure 1 it is possible to visualize the message from the developed design, taking into account the desired color variation; each of the changes corresponds to each of the phases: 1 (A), 2 (B) and 3 (C).

For this purpose:

1. Two distinct thermochromic pigments in color and thermal reaction in the same solution (blue 43 ° C and yellow 31 ° C) (a);

2. Two thermochromic pigments of different shades, but sensitive to the same temperature, in the same solution (blue 31 ° C and yellow 31 ° C) (b);

3. A self-adhesive backing containing liquid crystals protected by a polyester film having a temperature range between 30 ° C and 46 ° C (c).

In phase 1 (A) only the black plane tree and the vector elements are displayed. In phase 2 (B), the plane tree changes color to red and the phrase THIS IS GREEN appears in blue. Finally, in phase 3 (C), the title THIS IS GREEN and the plane tree change to green and the explanatory subtitle also appears in green because it is biodegradable.

The preparation of the pigmented solutions was based on the 1: 5 ratio, ie 1 part pigment (s) to 5 parts biodegradable varnish. For the title THIS IS GREEN, 2g of 43 ° C blue thermochromic pigment was previously mixed with 5g of 31 ° C yellow thermochromatic pigment, and then 35g of AQUABIO 11965 biodegradable varnish mixed with the aid of a motorized apparatus was added. namely a magic wand. For the subtitle because it is biodegradable. 3g of 31 ° C blue thermochromic pigment was also previously mixed with 4g of 31 ° C yellow thermochromatic pigment, then 35g of AQUABIO 11965 biodegradable varnish was added and mixed in the same manner.

The amount of yellow pigment 31 ° C is greater than blue 43 ° C in the prepared solutions. This was due to the need to approximate the shade of green as a result of the pigment mixture in the two formulations concerning the printing of THIS IS GREEN and because it is biodegradable.

For intentional stimulation of pigments and thermochromic liquid crystals, a programmable equipment has been developed that offers thermal variation in accordance with temperature ranges, ensuring dynamic visual contents.

Figure 2 presents a schematic of the device elaborated in function of the developed advertisement, providing the visual variation of the pigments and the liquid crystals, as indicated in the figure 3.

The present invention is, of course, not in any way restricted to the embodiments described herein and a person of ordinary skill in the art may foresee many possibilities for modification thereof without departing from the general idea of the invention as defined in the claims.

The preferred embodiments described above are obviously combinable with each other. The following claims further define preferred embodiments of the present invention.

Claims (22)

1. Biodegradable interactive panels characterized by: - a biodegradable medium comprising: - a textile layer comprising natural or artificial cellulosic fibers; - two polymeric layers comprising natural or modified polymers from cornstarch, vegetable oils and biodegradable synthetic polyesters; - ink. Interactive panels according to the preceding claim, characterized in that the ink comprises at least two temperature sensitive, UV radiation, phosphorescent or invisible microencapsulated pigments and / or microencapsulated liquid crystals. Interactive panels according to the preceding claim, characterized in that the fabric used in the biodegradable support consists of an interweaving of warp and weft yarns of natural or artificial cellulose fibers, preferably of bamboo, and a regular enlargement of taffeta to the web and to the weft that applies the basting so that it is two in both weft and web direction. Interactive panels according to claim 1, characterized in that a cornstarch-based polymeric layer, vegetable oils and biodegradable synthetic polyesters with a thickness of 50 to 150 µm are used. Interactive panels according to the preceding claims, characterized in that they have a textile substrate covering. Interactive panels according to claim 2, characterized in that the thermochromic pigment ink comprises pigments with a diameter of less than 20pm. Interactive panels according to claim 2, characterized in that the microencapsulated liquid crystal paint contains a concentration between 33% and 40% solids content. Interactive panels according to the preceding claim, characterized in that the microencapsulated liquid crystals have a size between 10 and 15pm. Interactive panels according to any one of the preceding claims, characterized in that they comprise a chromatic stimulation device coupled to the biodegradable support. Interactive panels according to claim 9, characterized in that the stimulation device comprises temperature sensors, resistors, simostat (6), rheostat, zinc plates (2,3) or nickel-chromium wire and fixing panel. components. Interactive panels according to the preceding claim, characterized in that the stimulation device further comprises a photovoltaic system comprising a photovoltaic module, charge regulator and accumulator battery. Interactive panels according to claim 1, characterized in that they further comprise a liquid crystal film. A biodegradable process characterized by obtaining the interactive panels described in the preceding claims, since the covering of the textile substrate comprises the following steps: Preparation and organization of materials by layers; Application of a non-stick paper, which involves the outer layers; Layering the material under certain pressure, temperature and velocity conditions, preferably with a pressure of 0.1 MPa, a temperature of 180 ° C and a velocity of 2 m / min; The composite, still wrapped in non-stick paper, cools for 3 minutes until it reaches room temperature. Process for obtaining the biodegradable interactive panels described in claims 1 to 12, characterized in that it comprises the following steps: Elaboration of the biodegradable support through the selection and preparation of the different constituent layers of the biodegradable support and the covering with the use of equipment that effects the bonding of the film to the textile substrate; Selection of materials with a particle size of less than 20pm from temperature sensitive, UV radiation, phosphorescent or invisible pigments; - Mixing pigments with biodegradable varnish supported by a rotary motorized mechanical instrument; - Solution filtration; - Selection of the paste solution with microcapsule diameter between 10 and 15gm and concentration of about 33% of solids content; Mixing the solution obtained in the previous step with a binder supported by a rotary motorized mechanical instrument; - Addition of a UV protector and mixing with a rotary motorized mechanical instrument; - Application of the developed inks on the support by spray stamping; - Spray paint with pigments on a mold; - Mold removal; - Fill with dark color paint in the area where the liquid crystal paint will be applied; - Spray on the mold; - drying at room temperature; - Mold removal. Method according to the preceding claim, characterized in that in the construction of the biodegradable support the coating is carried out by lamination, heat and pressure, using equipment covering both sides simultaneously. Process according to Claim 14, characterized in that the pigment is mixed with biodegradable varnish in a proportion of 1 part pigment to 5 part varnish. Process according to Claim 14, characterized in that the solution is filtered using vacuum filtration to remove pigments having a diameter greater than 20 µm. Process according to claim 14, characterized in that mixing with a binder is carried out in the ratio of 1 part alcohol to 1 part liquid crystal paste. Process according to the preceding claim, characterized in that the alcohol used is glycerol. 20. Process of a deal with the claim 14, characterized by the addition of a UV protector to be made on a concentration between 2 and 10%, more specifically 8%. Process according to Claim 14, characterized in that the spraying on the mold is carried out with a spray gun support for painting at a distance of approximately 300 to 400mm from the pigmented paint and allowed to dry at room temperature. Method according to Claim 14, characterized in that the second spraying on the mold is carried out with a spray gun support at a distance of between 150 and 200 mm.