MXPA99010421A - Al2 - Google Patents

Abstract

The invention relates to Al2O3-containing, high temperature resistant glass sliver based on silicic acid, having a highly textile, cotton-like and voluminous character. The invention also relates to glass staple fiber products from said glass sliver and their use. The textile character and high temperature resistance are obtained in particular by selective acid extraction. The composition of the inventive glass sliver comprises in particular SiO2, as main component, and 1-5 weight%Al2O3, as subsidiary components.

Description

GLASS TAPE, RESISTANT TO HIGH TEMPERATURE, WHICH CONTAINS OXIDE TO UMI IOO. WITH A HIGHLY TEXTILE CHARACTER AND PRODUCTS PE THE SAME DESCRIPTION OF THE INVENTION The present invention relates to a silica-based glass tape or wick, resistant to high temperature, containing Al: 03, with a highly textile character, with products of a similar glass ribbon, and with its use. The production of textile products on an inorganic fiber basis according to various processes has been known for a long time (Ullmanns Enzyklopadie der technischen Chemie, Bd. 11, Verlag Chemie, Weinheim, 1989). For the current manufacture of similar products, SiO fibers are used; based on silica or silica glass, making a distinction with respect to the single fibers in the primary forms of fiber (monofilament, fiber that has an unlimited length and a defined fiber cross section), and short fiber (fiber that it has a finite length and a defined fiber cross section) (Z. Ges.

Textilind. 69, 839 (1967), German Patent No. 42 40 354). German Patent No. 42 40 354 discloses that the linear textile fiber product - the ribbon (ribbon REF .: 32021 short fiber) - is an initial material for the production of short fiber yarns and twisted yarns suitable for processing in subsequent tracking products such as woven or interlaced fabrics. In accordance with this patent specification, a silica tape is known which consists of short silica fibers having a length of 50 to 1000 mm and which is characterized by a single fiber strength of 20 to 50 cN / tex, an adhesion to the tape from 2 to 20 N, and a belt fineness from 50 to 2000 tex. This textile fiber product is obtained in a three-stage process that combines the dry spinning of a strand of water glass filament with soda, the formation of the glass ribbon with water with soda according to the extraction process and cylinder, and the transformation into silica tape in a subsequent treatment section. Therefore, it is based on a solution of glass and water with soda and exclusively contains SiO: and Na: 0 in various proportions by weight. The use of a silicon tape produced in such a manner for processing the corresponding short fiber yarns and twisted yarns, ropes and woven and interlaced fabrics, is claimed for application temperatures in excess of 400-500 ° C. However, the information regarding the behavior of such siliceous tapes at temperatures in. the neighborhood of 1000 ° C. This material is also not offered in the market.

In addition, the production of glass tapes according to the extraction cylinder process is known for a prolonged period (German Examined Patent Application No. 1 270 748, German Patent No. I 199 935, German Published Patent Application Number 195). 05 618). In these methods, molten glass emanates from spinning nozzles that are located at the bottom of a melting end. The filaments of elementary glass are subsequently extracted by means of a drum, where the filaments are divided by means of a uniformer and are supported by air flow, in glass fibers having short non-uniform lengths are transported to a device placed in Parallel with the shaft of the drum for the production of a ribbon or fiber ribbon. The strength and near formation of the glass ribbon in the present depend directly on the extraction speed. Typically, textile process aids (eg sizing agents) are added further during the process of making the tape material. However, due to the components contained in the glass, such glass ribbons are not suitable for applications at temperatures above 300-400 ° C. Numerous attempts have been made to subject the glass fibers to acid treatment in order to improve their stability at temperature, in order to remove the glass constituents (boundary-forming substances) and partially remove the network modifiers (GB 976 565, EP 236 735, GB 933 821, GB 20 94 363, US 2 718 461, US 2 491 761 , US 4 778 499). In these known processes, the acid treatment is carried out on the glass fibers in the direction of individual fibers (filaments), on glass fiber bodies such as mats, felts, bulk material, etc., where the fibers are present randomly (in random orientations), or in particular textile tracking products such as flat yarns or fabrics based on glass fiber filaments.

Although it is possible to improve the thermal resice of fibers and products treated in this way, the mechanical properties (fiber resice, elasticity, etc.), however, they have been reduced so strongly that processing in various textile tracking products is not possible. Similar materials are therefore mainly used for the manufacture of woven materials having high specific gravities (see German Patent No. 42 40 354). For this reason, attempts have been made to ensure textile processing with the aid of additional process steps, by providing glass fibers treated with acid, with particular coatings (EP 236 735), or by incorporating additional materials such as organic textile fibers (DE -OS 42 21 001). These sophisticated socks to a certain extent improve the mechanical properties, however, not in the textile properties of these fiber materials. So far, it has not been successful in obtaining fiber materials having typical properties of cotton. Furthermore, upon heating these known fibers, 5 organic constituents are released, which are partially dangerous to health. The manufacture of all technical textile products previously known for applications at temperatures above 400-500 ° C can not be implemented on the basis of these materials since bulky or corresponding tapes are not available. For a potential use in the high temperature range of about 1000 ° C as textile fiber products, they have been further proposed in the above - in addition to the silicas mentioned and the glass fibers of: silica, production of which ts from molten quartz material (temperatures exceeding 2000 ° C) and that incur enormous costs - and the planes based on filaments SiO content exceeding 90%). To make them more luminous and with volume, these flat threads are generally subjected to a sophisticated and expensive processing e, that is, texturized. The texturing process is designed in such a way that the filaments of capillary glass supplied to an ooquilla by means of a feeding facility become entangled, by means of cold air (discharge method). However, by this processing it is likewise not possible to obtain the desired volume and bulky fiber products having a highly textile character as in the present invention, which has subtially more points in common with a cotton fiber than with a material of fiber that presents typical properties of glass (brittle condition of the fiber, irritation to the skin, etc.). A possible variety of textile tracking products obtainable from these and the textured planes is therefore limited a priori. The attempts to produce short fiberglass yarns having a textured effect, which is described in the prior art (DE-OS 195 05 618), do not constitute an alternative in this context because, on the one hand, the tape C glass used in turn must be processed with additional continuous filaments, and on the other hand is not suitable for use at elevated temperatures (400 - approximately 1100 ° C). The materials based on inorganic fiber known in the prior art therefore do not meet the following criteria:. Highly textile fiber properties (cotton character, ie, volume character, woolly, bulky structure, high air holding capacity, similarity with twisting and twisting, pleasant feeling, contact with the skin, absence of irritation of the skin, without brittle condition of the fibers). obtaining or improving mechanical properties after treatment with acid-,. direct production of various textile tracking products; without limitation to technical textiles if not used in the textile industry as much as possible _ without additional materials or measures (texturized, coating, etc.), required for the production of various textile tracking products, sufficient thermal resistance at continuous temperatures above 400 ° C. . without release of organic constituents during heating, without danger to health. An object of the present invention is to prepare a high temperature resistant glass ribbon, containing Ai 0. as a high performance textile fiber material which is suitable to serve as an initial product for the manufacture of any known textile tracking product. until the date. This high performance textile fiber is made to combine specific benefits of organic textile fibers or natural fibers with the inorganic textile fibers in a resulting combination product ("inorganic cotton"). In analogy with a cotton fiber, the highly textile character of the fiber material according to the invention is characterized by a curved structure, open curl and with a high volume and volume character. In the textile manufacturing process, the novel inorganic fiber allows for additional processing similar to a cotton fiber, however, the addition of additional materials, textile processing aids, binders or the like may not be necessary. The novel glass ribbon is to provide it asymmetry for direct processing, without requiring additional process steps (coating measures, texturing steps or the like), in short fiber yarns, twisted yarns and technical textiles having highly textile properties. During the processing and use of the glass tape according to the invention, only a negligible proportion of powder is produced. Compared with cotton fiber, the glass ribbon containing Al O is also characterized by mechanical properties more clearly improved and thermal resistance greatly improved. The highly textile fiber material of the invention with no invention contains any organice component, so that there is no organic constituent that is released during heating. The fiber material is to present a high devitpfication resistance, is resistant against most of the chemical substances (with the exception of phosphoric acid, hydrofluoric acid as well as strong dyes), and is compatible with the skin, and does not present any danger to health. What is produced are glass tapes that contain Al-O, which represent a combination of the properties of an organic and inorganic textile fiber ("inorganic cotton"), and can be processed into any textile tracking product known up to now and at the same time can be used for applications to temperatures from 400 to approximately 1100 ° C. This objective is obtained through a glass tape resistant to high temperature, containing A1; 05, according to claim 1, a product of short glass fiber resistant to high temperature, containing A1; 03, in accordance with claim 14, and the use of similar glass ribbons and products according to claims 16 and 17. The glass ribbon of the invention, which in particular is a solid ribbon, exhibits highly textile properties which manifest themselves in a property similar to cotton and / or an increased volume. In particular, a glass strip according to the invention is obtained which is a suitable tape and which is subjected to acid extraction, which allows particularly high textile properties of the high temperature resistant glass ribbon, which contains A1, to be generated. .03, resulting. The subject matter of claims 3 to 5 are particularly advantageous chemical compositions of glass strips resistant to high temperature containing A1; 03, as they occur, after an acid treatment. Claims 6 to 8 in particular relate particularly to advantageous properties of a similar textile high performance fiber material. In claims 9 to 13, the preferred conditions for the production of the glass tape of the invention are specified in greater detail. According to the invention, starting from the known prescriptions for the manufacture of high temperature resistant glass fibers (GB 976 565, GB 1 121 046), a glass ribbon is preferably subjected to an acid extraction. The glass ribbon in the present, for example, has the following composition: 70-75% (by weight) of SiC_, 15-25% (in pésol of Na O and / or K; 0, as well as 1 to 5% (by weight) of A1; 0, with additional components which are possibly contained in low weight ratios • up to 5 i. Here it is surprisingly found that the particularly highly textile properties are generated in the glass ribbon containing A1: 03 resulting by a suitable combination of tape / acid treatment, so that a highly textile, similar or cotton type fiber can be made ("inorganic cotton"). A content of A1; 03 between 1 and 5% (weight) is preferred with a purpose towards a textile character and with high fiber strengths. The additional possible components in the light weight compositions such as CaO, TiO;, MgO, Fe: 03, B; 0? or traces of additional components do not impair the textile character of the fiber and on the contrary can even further improve the mechanical properties. It has been established by tests that particularly advantageous textile properties and high strengths are obtained if a glass ribbon including 70-751 (by weight) of SiO :, 15-25% (by weight) of Na: 0 and / or KO, as well as 1 to 5% (by weight) of A1; 0, is exposed to an acid bath which optionally contains 0.1 to 5%, preferably 1 to 2%, of soluble silicone compound. In all cases, it is preferred to use Na: C as an alkaline oxide. In contrast to the known treatment processes as described, for example, in British Patent Specification 976 565, acid treatment, however, should not be carried out for improvement or even for total removal of the ccrter.idc. of Al; 0., because the latter contributes decisively c-1 character of high textile performance and with the excellent mechanical properties of the glass ribbon.

For acid extraction, inorganic and organic acids can be used. If inorganic acids are used, the extraction is suitably carried out with sulfuric acid, nitric acid, phosphoric acid or preferably hydrochloric acid within a temperature range from 30 to 90 ° C, preferably from 40 to 60 ° C, during 2 to 12, preferably 10 to 12 hours, with an acid concentration between 1 and 30%, preferably 15 and 20%, and the amount by quantity of the glass fiber material used with respect to the volume of acid medium constitutes from 1 / 2.1 to 1/40, preferably 1 / 4 to 1/15. If an organic acid such as formic acid, acetic acid or oxalic acid is used, the temperature applied in an experienced manner is between 30 ° C and the boiling point of the organic acid, preferably between 50 and 90 ° C, for a period of 2 hours. at 12 hours, preferably 10 to 12 hours. The acid concentration for formic acid and acetic acid is from 1 to 80%, for oxalic acid, from 1 to 30% and the proportion by quantity of the glass fiber material with respect to the volume of the acidic medium is also 1 / 2.1 for 1/40 The subsequent rinsing with water can be carried out at a temperature of 15 to 120 ° C, preferably 15 to 22 ° C, optionally lower pressure. If alcohols such as methane are used! or ethanol and saline solutions as a rinsing medium, temperatures between 15 and 60 ° C are preferred. The subsequent drying is preferably carried out at a temperature of 40 to 150 ° C, preferably 50 to 130 ° C. This can optionally be followed by annealing at 300-1000 ° C. Both in the acid treatment process and in the rinsing process, a stationary or even agitated medium can be used. The tape is used properly in rolled form. In the drying process, any usual drying method and apparatus can be used, depending on the moisture content of the glass ribbon containing Al; 03. Sometimes a pre-drying step is recommended, for example by means of centrifugation or pressure separation with the help of pressurized air. Whether the drying method is implemented intermittently or continuously, it is not important for a successful drying of the tape material according to the invention. In contrast to the prior art previously known for acid-treated glass fibers, the mechanical and textile properties of glass tapes containing Al: 0., Extracted with acid, do not degrade. Due to the selective extraction with acid, obtaining the highest possible degree of fiber strength is ensured, while a surprising increase in strength has even been partially observed. The textile processing in any of the known textile tracking products such as short fiber yarns, twisted yarns and technical textiles is possible immediately and without any additional required material or measurement, while the dust contamination is also negligibly low. The textile processing of the tape material of the invention can be carried out without requiring any addition of textile processing aids, additional materials (glass filaments, stainless steel filaments, etc.), binders or the like. However, when necessary, the addition of small amounts of textile auxiliaries (in particular unsightly additives) is possible. Another particular advantage of "inorganic cotton" according to the invention is that it is completely free of organic constituents as a result of acid extraction, so that upon heating up to 1100 ° C, no organic constituents can be released. The burning of the textile sizing agent which can be observed with conventional organic fiber materials (eg glass fiber materials) is therefore not observed for the glass tapes containing Al_0- of the invention. Due to the cross sections of underlying fibers (6 to 15 μm, preferably 10 μm), these fiber materials have no potential cancerogenic (not breathable) so that health hazards can be excluded. Therefore, the present invention provides a glass ribbon containing A1: 0-, resistant to high temperature, having a highly textile character based on silica which combines the particular benefits of organic or inorganic textile fibers in a manner ideal. Without requiring any sophisticated and cost-intensive processing step, in particular texturing steps, a tape material is obtained which has an open structure, with volume and woolly character that is also present in the cotton fiber, but even by means of the texturing process of prior art materials it is not possible to obtain textile fiber products with volume character and comparable shawls capable of storing large quantities of air due to their condition of volume and voivodsity and therefore having excellent insulating behavior. In addition, the ribbons and the twisted and twisted cotton twists according to the present invention are clear analogies (optical appearance, pleasant feeling on contact with the skin, etc.). The typical properties of glass (for example brittle fiber condition, skin irritation and irritation or unpleasant sensation in contact with the skin, low bulkiness and high intrinsic weight (flat yarns)) are thus eliminated by extraction with acid. However, the glass ribbon containing Ai: 0. of the invention, although it obtains the advantages of cotton fiber, it also has favorable properties of inorganic textile fibers. In addition to the substantially increased fiber strength, the temperature stability of the material is further increased to such an extent by acid extraction that it can be used at temperatures up to about 1100 ° C. Even at these high temperatures, a considerable residual strength of the tape is still recorded. In addition, it has a high resistance to devitrification: at 1075 ° C, the formation of α-cristobalite is observed only after 24 hours. Compared with cotton fiber, the novel glass tape based on silica is characterized by a significantly lower water absorption (<; 0.5%, cotton approximately 8 -. ). As a result of the Si-OH free groupings, there is also a high absorption capacity. This reactive surface therefore lends itself to additional ion exchange and modification reactions. As a non-final consideration, by means of a corresponding selection of the conditions in the acid bath, a deliberate adjustment of the porosity can also be carried out on the glass ribbon containing A1: 0 :. (specific surface: 2-20 nr / g, specific pore volume 10-25 mmVg, specified pore surface: 5-15 nr / g to fiber cross sections of 9.5 to 11 μm). The products of high temperature resistant glass fiber, containing A1: 03 having high textile properties, are the subject matter of claims 14 and 15. The use of the tape material according to the invention and of the fiber yarns short, twisted yarns and technical textiles, as well as the loose short fiber fibers produced therefrom, is the subject matter of claim 15. These products are particularly useful for applications at temperatures above 400 ° C. The glass tape according to the invention consists of short fibers having a short fiber length between 50 and 1000 mm and can be processed with a fineness between 100 and 200 tex. Upward ribbons with a fineness of approximately 150 tex can be used, for example, directly as filler filaments for making woven glass fiber fabrics. In conventional bending and twisting machines, it is possible to obtain this tape material of short fiberglass yarns based on silica which can be used, for example, as wrapping or filling belts in the production of fiberglass fabrics woven or braided, for example, in woven glass fabrics (having the shape of rolled products) woven fabric strips, fiberglass waxes, hoses and gaskets (round or tetragonal). Due to the analogy with a stretched and twisted cotton yarn, the belts wound on spools are preferably fed directly to a spinning, twisting or twisting machine. If a further increase in strength is desired for particular applications, it is possible to process the short fiberglass yarns, but even the glass ribbons according to the invention, in commercially available torsion machines. However, if the main interest is a maximum achievable bulk of the fiberglass product, each glass ribbon is used in textile processing. Due to its voluminous character, similar to cotton, it is therefore possible to manufacture textile tracking products of low weight, from way you can get huge material savings and therefore reductions in cost per meter of operation or unit area. This also applies to the production of knitted or knitted fiberglass fabrics in industrial sewing and firing machines conventional. As a rule, only a negligible dust contamination hazard is observed before processing in textile machines. The glass ribbons containing Al; 03 can also be used for the production of bonded fiber fabrics.

; Due to its cotton-like nature of fiber material, bonded fiber fabrics having low packing densities (specific gravities <90 kg / m3) and a high insulating capacity are easily accessible as long as they can omit the corresponding texturing processes. This, too, points to considerable material cost savings per unit of surfaces (up to about 50% compared to commercially available bonded fiber fabrics on a base of textured filament yarns). Glass tapes containing HO are supplied to the production line in cut-off form. The bonding of prebonded bonded fiber fabrics is carried out by twisting the short fibers by means of penetrating needles (needle-punched nonwoven materials). For purposes of particular use, the bonding in a chemical network is also possible, for example, through the application of adhesives. The compact densification of such fibrous non-woven materials also opens the way for the production of fiberglass panels (boards). It is possible to produce a corresponding fiber paper, where the short glass tubes containing Al O contained in aa ^ a are deposited on a permeable surface for water, for example, a perforated cylinder). However, this is not a preferred variant. Due to its high thermal resistance and its excess insulating capacity, the glass tapes containing Al O according to the invention and the textile products pro-uced from it are especially as insulating materials of heat, in particular in furnaces, combustion chambers, kettles, gas ducts for high-temperature sealing means and high-temperature insulation, as well as for insulation of soundproofing materials in the construction industry, in fire protection , for acoustic and thermal insulation in the automotive industry (for example in engines, brake linings, in the catalytic converter, for cable linings, in the exhaust pipe silencer range), in the metal processing industry and in the chemical industry (for example as a thermal shield for aluminum funderxas), for electrical and home applications, in technology exhaust and filtration gases (for example,. for the purification of exhaust from soot and dust, for hot gas filtration, high performance filters), in medical technology (for example, as a cable protection, a cloth tube filter, prosthetic devices), as accumulator separators and compensators in power plants, for example, for gas turbines, power plants and incineration of waste), for the isolation of pipes, pipes and electrical terminals, in the construction of vessels, for the production of thermal shielding in aviation and aerospace engineering as well as a substitute for asbestos and ceramic fiber. The textile fiber products according to the invention, however, can also be used with great success as reinforcement material for synthetic materials (for example in the construction of ships and ships, in tanks, vessel installation construction, for gears). sports), for material reinforcements (for example, by incorporation into a metal matrix, in particular an Al matrix through the intermediary of a fusion process), as a coating for textiles and for special purpose textiles, as a carrier for bitumen for the reinforcement of plaster, cement, paper (for example fibrous cardboard) and rubber. The following examples serve to further explain the present invention.

EXAMPLE 1 An amount of 550 g of glass ribbon containing A1; 0, extracted with acid, having a fineness of 430 tex (tape 1, extraction with 15% strength of hydrochloric acid in the presence of soluble silicone compounds (3% ), temperature of 55 ° C, extraction time of 10 hours, ratio of amount of fiber material used / half acid of 1 / 2.5) having a composition of 94.2% (by weight) of SiO :, 1.1% (in weight) of Na: 0, 4.6% (by weight) of A1; 03 and additional components in traces, are wound through two rollers in a cylindrical textile spinning tube 170 mm long. The drawing speed is 120 m / min. Under analogous conditions, a glass ribbon of glass type C (ribbon 2, fineness also of 430 tex, composition of 70.2% (by weight) of SiO;, 15.7% (by weight) of Na20, 3.5% (by weight) of A1: 03, 5.0% (by weight) of CaO, 3.1% (by weight) of MgO, 2.0% (by weight) of BaO and additional components in traces) is wound. The acid treatment previously carried out under identical conditions only results in a slight modification of the chemical composition (alkaline content reduced by 0.3%) and therefore not in improved thermal stability. They were determined for both tapes (untreated and extracted with acid, respectively), the tape resistances (portions of 100 mm in length, without twisting) thus eats the abrasion and the number of filament breaks (fiber tape breaks) during the reel winding .

Results EXAMPLE 2 A glass ribbon containing A1; 03 (fineness, 630 tex, tape resistance 4.55 cN / tex, composition: 74.8 * SiO;, 17.5% Na: 0, 1.0% K: 0, 2.2% Al : 03, 1.7% of CaO, 1.1% of MgO, 0.9% of B: 0 ?, 0.3% of TiO :, addicnal constituents in traces) is subjected to extraction with mineral acid, with hydrochloric acid. Here, 50 g of tape (cross section of the fiber of 7 μm) was extracted into a 500 ml PTFE container, into 300 ml of hydrochloric acid with 20d strength in the presence of soluble silicone compounds (1.51-) in the next 12 hours at a temperature of 55 ° C. After a draining period of 10 minutes, the tape treated in this way is moistened six times with cold water (temperature, 18 ° C). Subsequently, the extracted and rinsed tape material is dried for 12 hours at a temperature of 55 ° C. Subsequently, the glass ribbon containing A1; 03, cotton type, highly textile, has the following composition: SiO :: 94.7% (by weight) Na: 0: 0.6% (by weight) A1: 03 2.5% (by weight) CaO: 0.9% (by weight) MgO: 0.7% (by weight) B: 03 0.4% (by weight) by weight) UNCLE: 0.1% (by weight) The tape material produced in this manner and having a bulky cotton-like character exhibits continuous temperature stability of up to at least 1000 ° C. The resistance of the tape, after the acid treatment, is 4.42 cN / tex. After a 24-hour treatment at 900 ° C, a residual resistance of 32 ?. Under these conditions, a-cristobalite formation is not observed.

EXAMPLE 3 In order to characterize the voluminous, cotton-like character of the glass ribbon containing A1; 03 according to the invention, apparent densities of untreated as well as acid-treated materials were determined in the non-compacted and compacted condition (as short fibers, 5 mm) and the relative cell volumes were estimated from them. In addition, the results of thermal conductivity measurements which are obtained at room temperature are indicated. The experimental results are matched with experimentally determined data on a glass ribbon of type C glass, not resistant to high temperature (for composition, see example 1) under analogous conditions. The parameters of extraction with acid and subsequent treatment correspond to those of example 2.

EXAMPLE 4 The glass ribbon containing A1; 03 based on silica (fineness, 660 tex, tape strength 5.35 cN / tex, composition: 74.8% SiO;, 17.5% of Na: 0, 1.0% of KO, 2.2% of A1: 03, 1.7% of CaO, 1.1% of MgO, 0.9% of B; 03, 0.3% of TiO :, additional constituents in traces) It has the shape of a rotating coil is subjected to an extraction with mineral acid, with hydrochloric acid. The tape material (7 μm fiber cross section) is extracted into a 3500 ml PTF container in 3000 ml hydrochloric acid with a force of 18% within the next 10 hours at a temperature of 58 ° C. Subsequently, the extracted textile fiber product is rinsed six times in the same container with cold water having a temperature of 20 ° C. Subsequently, the extracted and rinsed fiberglass product is dried for 12 hours at a temperature of 75 ° C. Subsequently, the glass ribbon containing A1: 03 having a bulky, cotton-like character has the following composition: .0 96.1. (by weight) 0.1 - (by weight) u 3.7- (by weight).

It further states that the trace proportions of the additional components are additionally contained as impurities. The specific loss of mass compared to an untreated fiber product constitutes 15.1%. The belt with a volume capacity of cotton type produced in this manner exhibits a continuous stability at temperature, up to at least 1050 ° C. After the acid treatment, an increase in the strength of the tape is observed (5.46 cN / tex). Residual strength after a 30-hour treatment at 1050 ° C is 42%. The tape material produced in this way is treated and subsequently spun in a conventional ring spinning frame (extraction speed, 150 m / min). The abrasion caused in the process is insignificantly low (< 0.0i%). No filament breaks were recorded during this processing step.

EXAMPLE 5 A glass ribbon on a silica base (fineness of 420 tex, tape resistance of 4.11 cN / tex) located in a tube of 170 mm long cylindrical textile thread that is thus subjected to extraction with mineral acid, with formic acid. The tape (cross section of the fiber of 9 μm) is extracted in a 3500 ml PTFE container, in 3100 ml of formic acid with a force of 30% in the presence of soluble silicones (2%) in the following 12 hours at a temperature of 60 ° C. Subsequently, the extracted textile fiber product is rinsed by rinsing by immersion in a PTFE container with cold water (temperature of 18 ° C). The extracted and rinsed material is dried for 8 hours at a temperature of 115 ° C. The specific loss of mass compared to untreated tape constitutes 13.3%, which correlates with a specific extraction rate of 96%. After the treatment, the glass ribbon containing A1: 03 with a bulky cotton-like character produced in this manner has the following composition: SiO; : 94.4% (by weight) Na; 0: C.9% (by weight) A1; 03: 4.3% (by weight) CaO: 0.2% (by weight) MgO: 0.1% (by weight) The strength of the tape after the acid treatment is 3.79 cN / tex. The glass tape containing A1: 0; It has highly textile properties, presents continuous stability in the temperature up to at least 950 ° C. After 24 hours of tempering at this temperature, a residual one-fourth of 28 is still registered; .

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects or products to which it refers.

Claims (17)

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:

1. A high-temperature, highly textile-resistant glass ribbon containing A1: 03 on a silica base, characterized in that it can be obtained by acid extraction of a glass ribbon having the following composition: 70-75% (by weight) of SiO; 15-25% (by weight) of Na; 0 and / or K; 0 1 to S: - (by weight) of A1; 0. and up to a maximum of 5% (by weight of additional components.

2. The highly textile-resistant high-temperature glass strip containing A1; 0, on a silica base, according to claim 1, characterized in that it can be obtained by extracting glass strips with an inorganic or organic acid, optionally in the presence of soluble silicones, characterized in that it contains the following components in the mass proportions specified: 85 to 99% (by weight) of Si02 1 to 5% (by weight) of A1.03 0 to 10% (by weight) of Na20 and / or K: 0 0 to 3% (by weight) of CaO 0 to 2% (by weight) of MgO 0 to 2% (by weight) of B: 03 0 to 1% (by weight) of TiO : 0 to 1% (by weight) of Fe oxides, in particular Fe: 03 0 to 1% (by weight) of ZrO: 0 to 0.5% (by weight) of BaO 0 to 0.5% (by weight) of PbO 0 to 0.5 (by weight) from Z_0 RC to 0.5. (by weight) of Cr-0, and 0 to 0.5% (by weight) of F.

3. The high-temperature, highly textile-resistant glass tape containing A1.03, according to claim 2, characterized in that has the following components in the mass proportions specified: 90 to 98% (by weight) of SiO: 2 to 5% (by weight) of A1: 03 0 to 3% (by weight) of Na: 0 and / or K: 0 0 to 1% (by weight) of CaO 0 to 1% (by weight) of MgO O to 1% (by weight) of Fe oxide, in particular Fe: 03, and 0 to 1% (by weight) of TiO;.

4. The high-temperature and highly textile-resistant glass tape, containing A1: 03, according to claim 2 or 3, characterized in that it contains the following components in the mass proportions specified: 95 to 98% (by weight) of SiO; 2 to 4% (by weight) of A1; 03 0 to 1% (by weight) of Na: 0 and / or K; 0 based on the total mass of the mentioned components.

5. The highly textile and high temperature resistant glass ribbon, containing A1: 0., According to claim 2, characterized in that it contains the following components in the mass proportions specified: 95 to 99% by weight) of SiO: 1 to 5 (by weight, of Ai O 0 aii by weight) of a_ and K; 0 0 to 3 (by weight) of CaO C to i (by weight) of Fe_0 -0 to 1 -. { in weight) of T? O_ and O at 1% (by weight) of MgO.

6. The high temperature and high textile resistant glass tape, containing A1: 03, according to one of claims 1 to 5, characterized in that it has a fiber cross section of 6 to 15 μm, preferably of 7 to 10 μm.

7. The high temperature and high textile resistant glass tape, containing Al; 03, according to one of claims 1 to 6, characterized in that it contains short fibers having a length of 50 to 1000 mm and / or having a fineness from 100 to 2000 tex.

8. The high temperature and high textile resistant glass tape, containing A1: 03, according to one of claims 1 to 6, characterized in that the strength of the fibers alone is from 2 to 50 cN / tex, preferably from 10 to 30 cN / tex.

9. The high temperature and high textile resistant glass tape, containing A1; 0., According to at least one of claims 2 to 7, characterized in that the extraction of acid is carried out under pressure and / or rinsing with water, alcohols or saline solutions and / or drying, and optionally annealing.

10. The highly textile and high temperature resistant glass strip, containing A1: 03, according to at least one of claims 2 to 8, characterized in that the inorganic acid is sulfuric acid, nitric acid, phosphoric acid or preferably hydrochloric acid , and for extraction with acid, the following acid extraction conditions are preferably applied: temperature range: 30-90 ° C concentration interval: 1-30% duration of extraction with acid: 2-12 hours and proportion by quantity of the glass fiber material used for the volume of the acid medium: 1 / 2.1 to 1/40

11. The high-temperature, highly textile-resistant glass tape, containing Ai_-C, according to at least one of claims 2 to 8, characterized in that the acid is an organic acid, preferably formic acid, acetic acid or oxalic acid , and the following acid extraction conditions are preferably applied: temperature range: 30 ° C up to the boiling point of the organic acid concentration range: 1-80%, for oxalic acid 1 to 30% duration of extraction with acid: 2-12 hours, and 5 proportion in quantity of the fiberglass material used with respect to the volume of the acid medium: 1 / 2.1 to 1/40.

12. The high temperature and high textile resistant glass tape, containing A1: 03, according to at least one of claims 9 to 11, characterized in that the rinsing is carried out with water at a temperature of 15 to 120 ° C. , optionally under pressure, or with alcohols, preferably methanol or ethanol, and saline solutions at a temperature of 15 to 60 ° C. 13. The high-temperature, highly textile-resistant glass ribbon, containing A1: 0., According to at least one of claims 9 to 12, characterized in that the drying is carried out at a temperature of 40 ° C.

J ^ D ^ °, and the annealing is optionally carried out at a temperature of i-.r '-. i, n0r0-n00 ° -C

14. A product of short glass fiber, resistant --- a-i -emperature and highly textile, containing A1: 0., in a silica base according to at least one of claims 1 to 13.

15. The product of short glass fiber resistant to high temperature, containing A1: 03, according to claim 14, characterized in that it is selected from the group consisting of: short fiberglass yarns, twisted yarns and technical textiles that they are in the form of woven fabrics, bonded fiber fabrics, (preferably needle punched mats), cords, tapes, hoses, gaskets as well as fiberglass papers and fiberglass panels, boards, and loose staple fibers.

16. The use of a high temperature and high textile resistant glass tape, containing Al; 03, according to one of claims 1 to 13, or a high temperature resistant glass fiber short product, containing Ai; C -, according to claims 14 or 15, for thermal insulation of materials, in particular in furnaces, combustion chambers, boilers, gas conduits for high temperature sealing means and high temperature insulation, as insulation of materials to sound test in the construction industry, in fire protection, for acoustic and thermal insulation in the automotive industry, in the metal processing industry and the chemical industry, for electrical and home applications, in the gas technology of leakage and filtration, in medical technology, as separators of accumulators and compensators, for insulation of tubes, pipes and electrical electrodes, in the construction ion of shipments, for the production of thermal shields in aviation and aerospace engineering, as well as substitute for asbestos and ceramic fiber.

17. The use of high temperature and high textile resistant glass tapes, containing A1; 03, according to one of claims 1 to 13, or the high temperature resistant glass fiber short product, containing A1: 03 , according to claim 14 or 15, as a reinforcement material for plastics, for reinforcement of material, as a coating for textiles and for special purpose textiles, as a carrier for bitumen and for the reinforcement of plaster, cement, paper and rubber.