Coated functional and technical textiles comprising recycled silica powder

Abstract

In view of the need for "sustainable production", the invention relates in particular to the development of high added value, environmentally friendly functional and technical textiles by using amorphous "bio-based silica" and "silica fume" obtained from waste by a recovery process as filler in textile coatings. Using these materials, which are used as substitutes for traditional fillers, especially TiO2, calcite, kaolin, synthetic silica and carbon black, provides selected textile surfaces with light-proof (in window shades and the like), heat-insulating and energy-saving, limited flammability and sound-insulating (acoustic) properties.

Description

Technical Field

[0001] The present invention relates to the development of coated functional and technical textiles for use in various fields.

[0002] Taking into account the need for "sustainable production", the present invention specifically relates to the development of coated functional and technical textiles with high added value, through the use of amorphous "silica fume" or "microsilica" and "bio-based silica" obtained from waste through recycling methods. These materials, which will be used as a substitute for traditional fillers (especially titanium dioxide (TiO2), synthetic silica, calcium carbonate and carbon black), provide selected textile surfaces with light blocking (blackout curtains, blackout curtains), thermal insulation, a certain level of flame retardancy (in all coated technical textiles) and partial sound insulation (acoustic) properties. Background Art

[0003] In response to the demand for sustainability and ecological approaches in the textile sector, the importance of recycled products is rapidly increasing. Renewable energy sources are also gaining prominence due to the shortage of traditional energy sources and their harmful effects on the atmosphere. Thermal insulation plays a significant role in energy conservation.

[0004] Functional textiles are a group of high-value-added products with excellent performance properties. Lamination and coating are widely used technologies to impart functional properties to fabrics used in technical textile production and expand their applications. During the coating process, various chemicals and fillers are transferred to the fabric in the form of pastes or foams, forming a film layer on the fabric. Depending on the properties of the binder polymer used, the end-use application, and the type of coating machine used, the coating formulation can contain a wide variety of chemicals. Common fillers include carbon black, titanium dioxide, calcite, talc, kaolin, and silica.

[0005] For example, patent application number TR 2020 / 17798 discloses a double-sided foam coating that does not wrinkle and, even if wrinkled, returns to its original flat form, providing 100% light protection or, optionally, a variable light protection percentage. The invention discloses a fabric comprising a colorant and / or a thickener and / or an air freshener and / or a pH adjuster and / or a polyacrylate; 10% to 20% of a polycarboxylic acid mixture and / or 5% to 10% of a titanium paste and / or 2% to 5% of a chemical that provides flexibility and has silicone properties. As can be seen, the use of titanium dioxide in the coating composition with a colorant for opacity is feasible.

[0006] With current technology, textile products using conventional fillers cannot make a significant contribution to reducing heat gain and loss, given the poor insulating properties of conventional fillers used in the textile sector and the fact that the highest energy losses in buildings occur through windows and other glazed areas. Furthermore, flame-retardant chemicals used in conventional textile coatings, particularly those containing antimony and halogen groups, are not only expensive but also have serious ecological disadvantages.

[0007] In conventionally produced blackout curtains, carbon black is used in the intermediate coating. Carbon black is toxic and contributes to greenhouse gas emissions due to its high carbon footprint.

[0008] Therefore, due to the aforementioned negativity and the inadequacy of existing solutions on this subject, there is a need for advancements in the relevant art. Summary of the Invention

[0009] The present invention aims to solve the above-mentioned drawbacks inspired by existing solutions.

[0010] The main purpose of this invention is to develop functional and technical textiles with a low carbon footprint and high added value by replacing traditional filling materials used in textile coating processes with partially or fully recycled filling materials. Technical textiles developed using amorphous "silica fume" and "bio-based silica" obtained from waste through recycling processes offer features such as eco-product characteristics with a low carbon footprint, energy savings and improved thermal insulation, light protection (in blackout curtains, etc.), a certain level of structural flame retardancy (in all coated technical textiles), and partial sound insulation (acoustics).

[0011] Another object of the present invention is to develop ecological and value-added coating compositions for use in the production of all household textiles, in particular blackout blinds and roller blinds, shrink textiles, outdoor textiles, wall coverings and all coated technical textiles.

[0012] Another object of the present invention is to use, for the first time in the art, recycled silica powder as a sustainable alternative to conventional filling materials (which are considered ecologically undesirable) and to provide additional properties for coated functional and technical textiles used in various fields. In the present invention:

[0013] - a silica fume particle size of <50μ (preferably <25μ) and a bio-based silica particle size of <25μ is sufficient to achieve a smooth surface coating,

[0014] - By using dark grey silica fume in the foam and paste coating, a 100% blackout effect can be achieved and in this way the use of carbon black, which is used in the coating of blackout curtain fabrics and whose ecological disadvantages have been discussed, can be completely eliminated or at least reduced by 70%,

[0015] -Silica fume and bio-based silica have flame retardant (FR) effects, thus reducing the FR chemicals used in conventional production by at least 20%,

[0016] - The use of silica fume and bio-based silica contributes to energy savings by improving the thermal insulation properties of coated technical textiles to a certain extent,

[0017] It has been shown that due to its sufficient hiding power, white silica fume can be used instead of conventional filler materials such as titanium dioxide, and in this way titanium dioxide (whose health risks are discussed) can be partially or completely dispensed with.

[0018] In order to achieve the above-mentioned objectives, the present invention provides functional and technical textile surfaces having ecological product characteristics with a low carbon footprint, energy-saving and heat-insulating characteristics, light-proof characteristics (in blackout curtains, etc.), a specific level of flame retardancy and partial sound insulation characteristics; at least one surface of the selected fabric includes at least one coating containing recycled amorphous "silica fume" and / or "bio-based silica".

[0019] According to one embodiment of the present invention, the preferred silicon dioxide powder "silica fume" (i.e., "microsilica") is a very fine pozzolanic material composed of amorphous silicon dioxide recovered industrially from high-temperature furnaces. A particle size of <50 μm (preferably <25 μm) is sufficient for the products according to the present invention.

[0020] According to one embodiment of the present invention, another preferred silica powder is a bio-based silica powder based on the hulls of cereals such as rice, wheat, etc. These hulls, which are in the form of bio-based waste, must first be reduced to ash under suitable conditions through an incineration and grinding process and screened to a suitable particle size (preferably <25μ).

[0021] According to one embodiment of the present invention, the weight per unit area of ​​the fabric is preferably 50 g / m 2 Up to 500g / m 2 , and is intended for use in the functional and technical textiles product group.

[0022] In an embodiment of the present invention, all textile coating methods (knife coating, spin coating, transfer coating, spray coating, roller coating technology, etc.) and lamination technologies are used to produce water-based foam and / or paste coatings.

[0023] In embodiments of the present invention, acrylics, styrene acrylics, styrene butadiene acrylics, polyurethanes, vinyl polymers and other polymers used in textile coatings (including but not limited to) are preferred as binder polymers.

[0024] In embodiments of the present invention, the coating process can be performed in a single or multiple layers on one or both surfaces of the fabric. Multiple layers of foam paste / coating paste having the same properties can be applied to enhance functional properties. In summary, the choice of coating process can vary depending on the end-use requirements of the coated fabric and the physical and mechanical properties of the base fabric.

[0025] Silica fume and bio-based silica are available in a variety of colors, from white to black. Studies conducted within the scope of this invention have shown that this color diversification supports different functional properties. For example, it was found that the use of dark silica in blackout curtains could eliminate or reduce the current use of carbon black, while the use of white silica could partially or completely eliminate the use of titanium dioxide and other conventional white fillers used in the production of functional and technical textiles.

[0026] Another innovative aspect of the present invention is the use of recycled silica powder, which has a lower thermal conductivity than conventional materials, as a filler material to provide thermal insulation properties to the product for "energy saving."

[0027] Silica powder is highly porous and has a high surface area. Depending on the particle size, the surface area of ​​the bio-based amorphous silica used within the scope of the present invention is as high as 321 m 2 / g; the surface area of ​​silica fume is 15m 2 / g to 30m 2 / g, and can also provide a certain level of sound absorption (acoustic) characteristics in the coated fabric. Therefore, the product of the present invention also has a limited level of sound absorption.

[0028] Within the scope of the present invention, coating compositions are prepared using recycled silica fume and bio-based silica of appropriate particle size for the production of technical textile surfaces. Stability, pH, and viscosity control of the coating chemistry are important parameters. The appropriate coating technique is selected taking into account the variation in coating material and the desired end result. The coating can be applied to one surface of the fabric, for example only on the front side ( Figure 1 ) on or on the rear side ( Figure 2 ), on both surfaces of the fabric ( Figure 3 ) or in multiple layers ( Figure 4 In the case of a foam coating, the foam layer is not limited to three layers, but may also consist of four or five layers of foam coating, for example, with one or two middle layers of a darker color to provide a light-blocking feature.

[0029] The fabric coated using the selected coating method is first dried at an appropriate temperature. After drying, the coating is smoothed using cold or hot calendering with rollers under appropriate pressure. Before winding, the hot coated fabric is passed through cooling rollers. This prevents the fabric from sticking after winding.

[0030] The manufacturing method according to one embodiment of the present invention comprises, in its most basic form, the following process steps:

[0031] i. Supply / prepare recycled silica powder of suitable particle size (<50μ), color (white, all shades of gray and black) and SiO2 ratio (>50%),

[0032] ii. preparing a foam paste / coating paste formulation comprising a binder polymer, recycled silica powder, a thickener, a cross-linking agent and auxiliary chemicals,

[0033] Composition of foam coating:

[0034] Composite foaming agent 100g to 1000g

[0035] Binder polymer 10g to 100g

[0036] Bio-based silica 10g to 300g

[0037] Auxiliary chemicals 5g to 50g

[0038] Paste coating composition:

[0039] Binder polymer 50g to 1000g

[0040] Bio-based silica 10g to 300g

[0041] 10g to 500g water

[0042] Auxiliary chemicals 10g to 100g

[0043] iii. Controlling the prepared paste / foam coating formulation (viscosity should be 10 dPas to 120 dPas, foam density 100 g / L to 300 g / L and pH 7.5 to 10),

[0044] iv. applying a coating process (preferably using roller coating, spin coating, transfer coating, spray coating, roller coating techniques and other suitable methods),

[0045] v. applying a drying and fixing process after coating (drying at 90° C. to 130° C. for 60 seconds to 150 seconds, fixing at 130° C. to 180° C. for 60 seconds to 240 seconds),

[0046] vi. applying a calendering process after drying (at a pressure of 5 to 70 bars) and

[0047] vii. Allow the coated fabric to cool (fabric temperature should be < 40°C before winding).

[0048] The structure and characteristic features and all advantages of the present invention will be more clearly understood through the drawings given below and the detailed description written with reference to these drawings, and therefore should be evaluated by considering these drawings and the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 : A cross-sectional view of a coating on the front surface of a fabric according to one embodiment of the present invention and an internal structure of the coating.

[0050] Figure 2 : A cross-sectional view of a back coating layer on the back surface of a fabric according to one embodiment of the present invention.

[0051] Figure 3 : Cross-sectional view of the coating on the front and back surfaces of a fabric according to one embodiment of the present invention.

[0052] Figure 4 : Layer diagram of a multilayer coating (blackout cloth, etc.) according to one embodiment of the present invention.

[0053] Figure 5 : Schematic illustration of the fabric coating process.

[0054] Description of Reference Numerals

[0055] 1 fabric

[0056] 2 coatings

[0057] 2a One-time coating

[0058] 2b Secondary coating

[0059] 2c Three-coating

[0060] 3 Binder polymer

[0061] 4. Silica powder (silica fume and / or bio-based silica)

[0062] 5 Auxiliary chemicals

[0063] 6 Coating equipment

[0064] 7 Foam paste / coating paste

[0065] 8. Dryer

[0066] 9 Pressing roller

[0067] 10 Cooler Cylinder

[0068] 11 Coated fabrics (products) DETAILED DESCRIPTION

[0069] In this detailed description, only the functional and technical textiles and preferred embodiments thereof which are the subject of the present invention are described for a better understanding of the subject matter.

[0070] This invention is based on a sustainable and ecological approach, and develops functional and technical textiles using amorphous silica obtained from bio-based waste (rice, wheat hulls, etc.) and silica fume recycled from high-temperature furnace flues in certain industrial processes (e.g., ferrochrome plants). The present invention aims to provide products manufactured using recycled filler materials with eco-friendly features that offer a low carbon footprint, energy savings and thermal insulation, light protection (e.g., in blackout curtains), a specific level of flame retardancy, and partial sound insulation.

[0071] Table 1. Composition by weight of the functional and technical textiles that are the subject of the present invention

[0072]

[0073]

[0074] Table 2. Composition by weight of coating compositions used within the scope of the present invention

[0075] Components Preferred % Available % Binder polymer 50 30-70 Recycling silica powder 25 10-30 Auxiliary chemicals 25 10-30

[0076] The coating formed on the fabric surface after the coating process with the coating paste / foam paste is a structure that imparts the target functional properties to the final product. The coating paste / foam paste mainly consists of water, binder polymer, filler material and various auxiliary chemicals.

[0077] Binder polymer is an organic substance that forms a film layer by wrapping the filling material and provides stable material adhesion to the fabric. The hardness or softness that the binder polymer imparts to the fabric also changes according to the molecular chain length of the binder polymer, its crystallization-amorphous structure and glass transition temperature. Although long chains are slightly softer, it can be observed that fastness characteristics have some decline. Therefore, the selection of binder polymer is also an important parameter. In the present invention, among the polymer materials, acrylic polymers, styrene-acrylic copolymers, vinyl polymers, polyurethanes, organosilicon or a combination of two or more of these polymers can be used. These binder polymers used enable the silicon dioxide powder obtained by the recovery method to adhere to and adhere to the fabric.

[0078] The fabric acts as a carrier for the coating. It can be composed of any type of natural or synthetic fibers or blends, including but not limited to cotton, polyester, nylon, acrylic, and combinations thereof.

[0079] Some chemicals used in textile coatings, while not directly impacting the coating process, can contribute positively to the coating paste / foam paste by providing various functional properties or aiding coating. Stabilizers, flame retardants, defoamers, blowing agents, thickeners, coloring pigments, etc. can be described as auxiliary chemicals. In our invention, care was taken to ensure that all of these auxiliary chemicals and the binder polymer were compatible with the recycled silica powder.

[0080] The light-blocking, opaque layer in the dimming material is obtained by mixing a black pigment, such as carbon black, into the coating / foam paste. To reduce the known harmful effects of carbon black, the present invention uses recycled silica fume and bio-based silica, which have a deep, smoky black color. Therefore, in the textile field, under the rubric of a clean and circular economy, it has become an innovative application for sustainable production and the reduction of carbon and greenhouse gas emissions. In a multi-coating, as an example, Figure 4 Layers 2a and 2c in the present invention may contain white pigments such as titanium dioxide (TiO2) or colored pigments to provide a decorative background. These layers are colored or generally white in color. If they are black in color, the intermediate layer (2b) is prevented from being visible on the surface. In addition, the use of white silica fume in the present invention also helps to reduce the amount of TiO2 currently used and helps to provide thermal insulation.

[0081] During the application of the present invention, the distribution and agglomeration of the solid particles used in the foam paste / coating paste are important. As the particle size increases, the powder material used in the foam coating is observed to be unevenly distributed. For this reason, care is taken to ensure that the particle size of the supplied silica powder is <50μ.

[0082] Recycled silica powder (4) has low thermal conductivity due to its high silicon dioxide (SiO2) content. These properties offer significant advantages in terms of thermal insulation and energy conservation. Therefore, it is very important that the recycled silica powder supplied in the present invention contains a high proportion of SiO2 (preferably >90%).

[0083] Thickeners may also be used in the formulation to increase viscosity and adjust the rheology of the coating paste. Suitable viscosities range from 10 dPas to 120 dPas.

[0084] The pH value is one of the most important parameters that influences the properties of a coating. Most water-based coatings are formulated to have a pH between 7.5 and 10. This pH range is important for the binder polymer to function well with fillers, pigments, and auxiliary chemicals. In addition, any change in pH can lead to an increase or decrease in the viscosity of the foam paste / coating paste. The pH value also has a significant impact on the stability of the binder polymer.

[0085] In a preferred embodiment of the present invention:

[0086] - the particle size of the recycled silica supplied in the coating paste / foam paste is <50μ (preferably <25μ),

[0087] - SiO2 content of at least 50% (preferably >90%),

[0088] -Viscosity range from 10dPas to 120dPas,

[0089] - pH range of 7.5 to 10,

[0090] - Dry at 90°C to 130°C for 60 seconds to 150 seconds,

[0091] - Fix at 130℃ to 180℃, 60 seconds to 240 seconds,

[0092] - calendering at a pressure of 5 to 70 bar,

[0093] - Foam density is 100g / L to 300g / L.

[0094] The color of the silica powder used in the final coating should be as close to white or a light shade as possible, which will provide advantages in terms of sunlight reflection, heat insulation and easy coloring. For the jetness characteristic, it is important that the silica powder is as dark as possible to partially or completely eliminate the use of carbon black.

[0095] The foam coating and paste coating can be applied in different layers or in combination. For example, a protective paste can be applied over the foam coating. The paste coating can be applied over another surface of the foam-coated part to provide coverage, and this layer can be colored to give the product a decorative effect.

[0096] Since recycled silica powders (4) are inherently flame retardant, they offer ecological and economic advantages by reducing the use of flame retardant chemicals.

[0097] As a preferred embodiment of the present invention, the light shielding coating may include a multilayer coating including a three-layer or four-layer foam coating, a protective paste coating, and a paste coating on the front side. In the present invention, auxiliary chemicals such as flame retardants, light stabilizers, preservatives, antimicrobial agents, surfactants, foaming agents and stabilizers, pH control agents may be used to impart such properties. Figure 4 To improve the functional properties of multilayer coating samples, such auxiliary chemicals must be compatible with each other.

[0098] According to some other preferred exemplary embodiments of the present invention, it can also be applied as a back coating to improve the flame retardancy of upholstery fabrics and the flame retardancy and thermal insulation properties of thick cloths ( Figure 2). In addition, the present invention can also be used for vertical blinds for similar purposes. Again, the fabric coated according to the present invention can be layered and used in different fields.

[0099] Experimental studies

[0100] The results of a comparative analysis of functional and technical textiles coated with recycled silica fume and / or bio-based silica within the scope of the present invention are given below:

[0101] Example 1: Foam coating formulation (Formula 1)

[0102]

[0103]

[0104] The coating is carried out using a knife coating technique. However, the application of the formulation is not limited to the knife coating technique, but can also be carried out with other suitable coating techniques. For foam coating, the knife distance can be 0.2 mm to 1.5 mm, and the knife angle can be + / - 30 degrees.

[0105] The drying and fixing process may be performed at 90° C. to 150° C. for 90 seconds to 150 seconds. After the drying process, a calendaring process may be applied at a pressure of 5 bar to 70 bar to smooth the surface.

[0106] To compare the flammability effects of silica fume with conventional fillers, coatings were prepared under similar conditions and each coating was tested according to BS5852 Source 0 (cigarette test). When the burning distance was evaluated (Table 3), it was found that the lowest burning distance belonged to the coating containing silica fume and bio-based silica. These results indicate that the use of silica fume and bio-based silica will help reduce the amount of halogenated flame retardant chemicals that have ecological disadvantages.

[0107] Table 3. Burning length (cm) according to BS 5852 Source 0 (cigarette test) of coatings prepared with different types of filler materials

[0108] Filling material type Burning distance (cm) White silica fume 0.4 Light gray silica fume 0.4 Dark gray silica fume 0.4 Bio-based silica 0.4 Titanium dioxide 0.7 Porous titanium dioxide 1.3 calcite 0.8 synthetic silica 0.8

[0109] The opacifying properties of dark silica fume and bio-based silica were also evaluated for use in developing light-blocking fabrics. For this purpose, the light-blocking properties of the coated samples were visually tested according to DIN 14501. Clearly, a light-blocking effect was observed particularly in fabrics using dark silica fume and bio-based silica.

[0110] Furthermore, the light and solar properties of the fabric also support the light-shielding effect, as a result of testing with a UV-VIS-NIR spectrophotometer according to TS EN ISO 410. As can be seen in Table 4, the Tv and Ts values ​​are 0.0%.

[0111] Table 4. UV-VIS-NIR spectrophotometer measurement results

[0112] sample TV Rv Av Ts Rs As Tuv Classic Blackout Cloth (Includes Carbon Black) 0.0％ 6.0％ 94.0％ 0.0％ 5.9％ 94.1％ 0.0％ Dark gray silica fume 0.0％ 30.4％ 69.6％ 0.0％ 29.0％ 70.9％ 0.0％ Bio-based silica 0.0％ 38.8％ 61.2％ 0.0％ 36.5％ 63.5％ 0.0％

[0113] Tv: Transmittance in the visible light region

[0114] Rv: Reflectance in the visible light region

[0115] Av: Absorption rate in the visible light region

[0116] Ts: Solar transmittance

[0117] Rs: Solar reflectivity

[0118] As: Solar absorptivity

[0119] Tuv: Ultraviolet transmittance

[0120] Example 2: Paste coating formulation (Formulation 2)

[0121]

[0122]

[0123] These studies were conducted to investigate the use of white silica fume in the formulation of protective and decorative front paste coatings for foam coatings, paste coatings for roller blinds, back coatings for upholstery fabrics and thick curtains, coatings for vertical blinds and other functional / technical textiles, as an alternative to classic filler materials such as titanium dioxide, calcite, kaolin, synthetic silica, etc. The aim was to use recycled materials that are more economical than these fillers and to improve the thermal and acoustic insulation and flame retardancy properties of the coatings.

[0124] The whiteness values ​​of the coated samples were measured by UV-VIS spectrophotometer and compared (Table 5).

[0125] Table 5. Whiteness index measurement results

[0126] sample Berger Whiteness Index Reserve paste + porous titanium dioxide 72.9 Reserve paste + white silica fume 72.1

[0127] Based on the measurement results, it was concluded that there was no significant difference in whiteness when white silica fume was used instead of porous titanium dioxide (titanium dioxide dispersed with water), and that white silica fume could be partially or completely used in the coating to replace white pigments such as titanium dioxide, calcium carbonate, etc., thereby contributing to thermal and sound insulation as well as flame retardancy properties.

[0128] The optical and solar properties of the coated samples were also determined by UV-VIS-NIR spectrophotometry according to TS EN ISO 410 (Table 6). The reflectance values ​​obtained (Rv and Rs) support the whiteness values.

[0129] Table 6. UV-VIS-NIR spectrophotometer measurement results

[0130] sample TV Rv Av Ts Rs As Tuv Reserve paste + porous titanium dioxide 0.0％ 85％ 15％ 0.0％ 77.8％ 22.2％ 0.0％ Reserve paste + white silica fume 0.0％ 85.3％ 14.7％ 0.0％ 78.1％ 21.9％ 0.0％

[0131] Example 3: Multi-layer coating formulation for blackout curtains

[0132] In this set of sample applications, the amount of FR was reduced by 20% to 30%, and the coatings were prepared by using a coating paste containing dark silica fume and / or bio-based silica instead of carbon black. The coating results obtained based on a formulation containing standard flame retardant chemicals (FR) (100%) were evaluated in terms of opacity and flame retardancy properties.

[0133]

[0134] Flammability testing was performed according to BS 5867 and the results of burning length (cm) are given in Table 7.

[0135] Table 7. Burning length of FR coating according to BS 5867 (cm)

[0136]

[0137]

[0138] According to the results, it was revealed that silica fume and bio-based silica contributed to the FR of the coating, and the same flame retardancy level as the conventional formulation with 100% FR additive was achieved by reducing the amount of halogenated flame retardant.

[0139] Furthermore, the light blocking properties were tested according to DIN 14501. It was also clearly seen that a light blocking effect was achieved in the fabrics using dark silica fume and / or bio-based silica.

Claims

1. A functional or technical textile, the surface of which provides eco-product characteristics with a low carbon footprint, energy saving and heat insulation characteristics, light protection characteristics (in blackout curtains, etc.), a specific level of flame retardancy and partial sound insulation characteristics, characterized in that, on at least one surface of the selected fabric, at least one coating contains recycled amorphous "silica fume" and / or "bio-based silica".

2. Functional or technical textile according to claim 1, characterized in that it comprises 25% to 45%, preferably 30%, by weight of a textile layer and 55% to 75%, preferably 70%, by weight of a coating paste and / or foam paste coating.

3. The functional or technical textile according to claim 1, characterized in that the coating comprises 30% to 70% by weight of a binder polymer, 10% to 30% by weight of "silica fume" and / or "bio-based silica", and 10% to 30% by weight of auxiliary chemicals.

4. The functional or technical textile according to claim 1, characterized in that the fabric is a textile surface produced by knitting, weaving, non-woven (non-woven surface) technology from natural or synthetic fibers including cotton, polyester, nylon, acrylic, rayon and combinations thereof, and the weight per unit area of ​​the fabric is 50 g / m 2 Up to 500g / m 2 .

5. The functional or technical textile according to claim 1, wherein the binder polymer is an acrylic polymer, a styrene-acrylic copolymer, a vinyl polymer, a polyurethane, a silicone, or a combination of two or more of these polymers.

6. Functional or technical textiles according to claim 1, characterized by comprising amorphous "bio-based silica" and / or "silica fume" obtained from rice, wheat and other cereal hulls recovered from high temperature hot air furnaces / furnace flues, with a particle size below 50μ, a color of white, full shades of gray and / or black and containing >50% SiO2.

7. The functional or technical textile according to claim 1, characterized in that the auxiliary chemicals are thickeners, crosslinking agents, light stabilizers, preservatives, antimicrobial agents, surfactants, flame retardants, defoamers, foaming agents and foam stabilizers, coloring pigments, pH control chemicals or a combination of two or more of these chemicals.

8. The functional or technical textile according to claim 1, characterized in that the coating composition has a viscosity in the range of 10 dPas to 120 dPas, a foam density in the range of 100 g / L to 300 g / L, and a pH in the range of 7.5 to 10.

9. The functional or technical textile according to claim 1, characterized in that the coating of the coating paste and / or foam paste is applied in a single layer or multiple layers on one or both surfaces by knife coating, spin coating, transfer coating, spray coating, roller coating technology or lamination method.

10. The functional or technical textile according to claim 1 , wherein after coating, the textile is dried at 90° C. to 130° C. for 60 to 150 seconds, fixed at 130° C. to 180° C. for 60 to 240 seconds, calendered at a pressure of 5 to 70 bar, and cooled to a fabric temperature of < 40° C. before winding.

11. The functional or technical textile according to claim 1, characterized in that it is a blackout blind, a blackout blind, a roller blind, a vertical blind, a drape, an upholstery fabric or other functional and technical textile surface having a coating.

12. A method for producing a functional or technical textile according to any one of the preceding claims, characterised in that it comprises the following process steps: i. Prepare recycled silica powder of suitable particle size, color and SiO2 ratio, ii. preparing a foam paste / coating paste formulation comprising a binder polymer, recycled silica powder, a thickener, a cross-linking agent and auxiliary chemicals, iii. Controlling the prepared paste / foam coating formulation, iv. applying the coating process to the fabric using the selected technique, v. Drying and fixing process after coating, vi. pressing the fabric by calendering after coating, vii. Cooling and winding the coated fabric.

13. The method according to claim 12, characterized in that in process step (i), a recycled silicon dioxide powder having a suitable particle size of <50 μ, white, all shades of grey and black colour and an SiO2 ratio >50% is provided.

14. The method according to claim 12, characterized in that in process step (iii), the viscosity is 10 dPas to 120 dPas, the pH is 7.5 to 10, and the foam density is 100 g / L to 300 g / L.

15. The method according to claim 12, characterized in that in process step (iv), the coating method is knife coating, spin coating or roller coating.

16. The method according to claim 12, characterized in that, in process step (v), the drying is performed at 90°C to 130°C for 60 seconds to 150 seconds, and the fixing is performed at 130°C to 180°C for 60 seconds to 240 seconds.

17. The method according to claim 12, characterized in that in process step (vi), calendering is carried out at a pressure of 5 bar to 70 bar.

18. The method according to claim 12, characterized in that in process step (vii), the fabric temperature is <40°C before winding.

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