Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
  • D06M15/568—Reaction products of isocyanates with polyethers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
  • D06M15/572—Reaction products of isocyanates with polyesters or polyesteramides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/23—Sheet including cover or casing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/23—Sheet including cover or casing
  • Y10T428/237—Noninterengaged fibered material encased [e.g., mat, batt, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
  • Y10T428/31562—Next to polyamide [nylon, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
  • Y10T428/31565—Next to polyester [polyethylene terephthalate, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
  • Y10T442/277—Coated or impregnated cellulosic fiber fabric
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
  • Y10T442/2893—Coated or impregnated polyamide fiber fabric

Definitions

• the invention relates to construction materials, in particular for medical support bandages or technical devices, which in addition to transverse elasticity also have longitudinal elasticity, a method for their production and their use.
• the construction materials according to the invention generally consist of a carrier layer which is coated and / or impregnated with a reactive resin.
• construction materials according to the invention can be used for stiffening, shaping and sealing in the medical or technical field.
• construction materials according to the invention can also be used for the production of containers, filters, pipes, for connecting construction elements, for the production of decorative or artistic articles, for stiffening purposes or as filling or sealing material for joints and cavities.
• Construction materials which consist of a flexible carrier which is coated or impregnated with a water-hardening reactive resin are already known.
• DE-A 23 57 931 may be mentioned, in which construction materials made of flexible supports, such as knitted fabrics, woven fabrics or nonwovens, are described, which are coated or impregnated with water-curing reactive resins, such as isocyanates or prepolymers modified by isocyanate groups.
• water-curing reactive resins such as isocyanates or prepolymers modified by isocyanate groups.
• carrier materials made of glass fibers were used (US 45 02 479).
• these known carrier materials are only stretchable in the transverse direction, but are practically rigid in the longitudinal direction in order to achieve greater stability (US 45 02 479, column 3, lines 45 to 47).
• a disadvantage of the backing materials which are only stretchable in the transverse direction, is the appearance of folds when the material is applied to an uneven surface with conical elevations or variable radii, e.g. a human leg.
• Construction materials based on glass fibers as described in US 46 09 578, have the disadvantage of poor X-ray transparency. They also form sharp edges at the break points, which lead to injuries. Another disadvantage is the occurrence of glass dust during the manufacture and removal of the construction material.
• Fibers other than glass fibers have much lower moduli of elasticity, so that no beams with comparable longitudinal and transverse elongation are obtained.
• textile fabrics which are impregnated and / or coated with a water-hardening reactive resin, characterized in that they consist of organic fibers with a modulus of elasticity of 200 to 2500 daN / mm2 and that they have an extensibility in the longitudinal direction of more than 10% before curing. exhibit.
• the fabrics according to the invention also have one in the longitudinal direction.
• the longitudinal direction generally means the processing direction of the textile, for example in the direction of the chain or the wales.
• Transverse direction generally means perpendicular to the processing direction of the textile, i.e. in the direction of the weft or stitch row.
• the fabrics according to the invention can be in various geometric shapes. They are preferably in tape form, the long side of the tape corresponding to the processing direction of the textile.
• Organic fibers for the fabrics according to the invention can be natural fibers or chemical fibers.
• Natural fibers include, in particular, fibers from plant hair, such as cotton, bast fibers, such as hemp and jute, and hard fibers, such as sisal. Cotton fibers are particularly preferred.
• fibers made of synthetic polymers may be mentioned as chemical fibers.
• polymer fibers such as polyethylene, polypropylene, polychloride (e.g. polyvinyl chloride and polyvinylidene chloride), polyacrylic and vinylate fibers, polycondensation fibers such as polyamide, polyester and polyurea fibers, and polyaddition fibers such as spandex or elastane fibers.
• Preferred synthetic fibers are fibers made of polyesters, polyamides and polyacrylonitriles.
• Sheets made of polyester and / or polyamide and / or cotton fibers are particularly preferred.
• the fibers for the fabrics according to the invention are known per se (synthetic fibers, pages 3 to 10 and 153 to 221 (1981), Verlag Chemie, Weinheim).
• the thread system which is preferably incorporated in the longitudinal direction, enables elastic stretching in the longitudinal direction after a shrinking process.
• high-twisted yarns or twists made of staple fiber yarns with a twist coefficient ⁇ between 120 and 600 are preferred, so that the high twist gives a high torsional moment and therefore a tendency to curl.
• the rotation coefficient ⁇ is calculated where T is the number of twists per m of yarn or twine and TEX is the longer thread mass in g per 1000 m of yarn.
• the threads with an alternating direction of rotation are preferably incorporated in an alternating sequence, for example a thread S - 1 thread Z or 2 threads S - 2 threads Z.
• Both threads made of natural rubber (elastodia) and synthetic polyurethane elastomer threads (elastane) can be used as permanently elastic threads.
• Polyfile textured filament yarns made of polyester, polyamide etc. are used as chemical fibers to achieve the elongation.
• the elastic properties of these yarns are based on the permanent crimping and torsion of the threads obtained in the course of the texturing process, which is achieved by the thermoplastic properties of the materials.
• All types of texturing threads can be used, e.g. HE yarns (highly elastic crimp yarns), set yarns, HB yarns (high-rise yarns).
• the thread system incorporated in the longitudinal direction is held together by connecting threads, it being possible to use staple fiber yarns or twists made of natural fibers as well as staple fiber yarns or polyfile filament yarns (plain yarn) made of man-made fibers.
• the strength of these yarns is characterized by the modulus of elasticity (modulus of elasticity).
• the fibers for the fabrics according to the invention have a modulus of elasticity (E-module) in the longitudinal direction of 200 to 2500, preferably from 400 to 2000, daN / mm 2.
• the modulus of elasticity can be determined by methods known per se (synthetic fibers, pages 63 to 68 (1981), Verlag Chemie, Weinheim).
• the textile fabrics according to the invention generally have an extensibility in the longitudinal direction of more than 10, preferably from 15 to 200%, particularly preferably from 15 to 80%, before the reactive resin cures.
• Elongation in the longitudinal direction means the change in length compared to the fully relaxed fabric, which is achieved when the fabric is loaded in the longitudinal direction with 10 N per cm of width. Such measurements can be carried out, for example, in accordance with DIN 61 632 (April 1985).
• the earthen structures according to the invention generally have an extensibility in the transverse direction of 20 to 300%, preferably 40 to 200%, before the reactive resin has hardened.
• the textile fabrics according to the invention generally have a weight per square meter of 40 to 300 g, preferably 100 to 200 g.
• textile fabrics made of fibers of synthetic polymers are particularly preferred.
• mixed textiles are preferred, a fiber made of a synthetic polymer being used in the longitudinal direction and a vegetable fiber being used in the transverse direction.
• Textiles made of fibers of synthetic polymers or mixed textiles of synthetic polymers in the longitudinal direction and vegetable fibers in the transverse direction, the longitudinal expansion of which has been set by a shrinkage process, are preferred as the flat structures according to the invention.
• textile fabrics which contain polyfile, textured filament threads made of man-made fibers, such as polyester, polyamide, polyacrylonitrile fibers, which have been thermally shrunk and which are made of natural fibers or man-made fibers with a modulus of elasticity of 400 to 2000 daN / mm2 in the transverse direction consist of fibers made of high-strength polyethylene terephthalates with a modulus of elasticity of 900 to 2000 daN / mm2.
• man-made fibers such as polyester, polyamide, polyacrylonitrile fibers
• the processing forms of the textile fabrics according to the invention can be woven, knitted, crocheted or non-woven.
• Knitted fabrics such as warp knitted fabrics, knitted knitted fabrics and knitted fabrics are mentioned. Raschel knitted fabrics are particularly preferred.
• Water-curing reactive resins are preferably resins based on polyurethane or polyvinyl resin.
• Suitable water-curing polyurethanes are all organic polyisocyanates known per se, ie any compounds or mixtures of compounds which have at least two organically bound isocyanate groups per molecule. These include both low molecular weight polyisocyanates with a molecular weight below 400 and modification products of such low molecular weight polyisocyanates with a molecular weight that can be calculated from the functionality and the content of functional groups, for example 400 to 10,000, preferably 600 to 8,000, and in particular 800 to 5,000, molecular weight.
• Q is an aliphatic hydrocarbon radical having 2 to 18, preferably 6 to 10, carbon atoms, a cycloaliphatic hydrocarbon radical having 4 to 15, preferably 5 to 10, carbon atoms, an aromatic hydrocarbon radical having 6 to 15, preferably 6 to 13, carbon atoms, or an araliphatic hydrocarbon radical having 8 to 15, preferably 8 to 13, carbon atoms, mean.
• Suitable low molecular weight polyisocyanates of this type are, for example, hexamethylene diisocyanate, 1,12-dodecane diisocyanate, cyclobutane-1,3-diisocyanate, cyclohexane-1,3- and -1,4-diisocyanate and any mixtures of these isomers, 1-isocyanato-3,3,5 trimethyl-5-isocyanatomethyl-cyclohexane, 2,4- and 2,6-hexahydrotoluenediisocyanate and any mixtures of these isomers, hexahydro-1,3- and / or -1,4-phenylene diisocyanate, perhydro-2,4'- and / or -4,4'-diphenylmethane diisocyanate, 1,3- and 1,4-phenylene diisocyanate, 2,4- and 2,6-tolylene diisocyanate and any mixtures of these isomers,
• Suitable higher molecular weight polyisocyanates are modification products of simple polyisocyanates of this type, ie polyisocyanates with, for example, isocyanurate, carbodiimide, allophanate, biuret or uretdione structural units, such as those obtained by known processes of the prior art from the exemplified simple polyisocyanates of the above general Formula can be made.
• modified polyisocyanates the prepolymers known from polyurethane chemistry with terminal isocyanate groups in the molecular weight range 400 to 10,000, preferably 600 to 8,000 and in particular 800 to 5,000 are of particular interest.
• These compounds are prepared in a manner known per se by reacting excess amounts of simple polyisocyanates of the type mentioned by way of example with organic compounds having at least two groups which are reactive toward isocyanate groups, in particular organic polyhydroxyl compounds.
• Suitable polyhydroxyl compounds of this type are both simple polyhydric alcohols such as, for example, ethylene glycol, trimethylolpropane, 1,2-propanediol or 1,2-butanediol, but in particular higher molecular weight polyether polyols and / or polyester polyols of the type known per se from polyurethane chemistry with molecular weights of 600 to 8,000, preferably 800 to 4,000, which have at least two, usually 2 to 8, but preferably 2 to 4 primary and / or secondary hydroxyl groups.
• NCO prepolymers which, for example, consist of low molecular weight polyisocyanates of the type mentioned by way of example and less preferred compounds with isocyanate groups reactive groups such as polythioether polyols, hydroxyl-containing polyacetals, polyhydroxy polycarbonates, hydroxyl-containing polyester amides or hydroxyl-containing copolymers of olefinically unsaturated compounds have been obtained.
• Compounds suitable for the preparation of the NCO prepolymers and having groups which are reactive toward isocyanate groups, in particular hydroxyl groups are, for example, the compounds disclosed by way of example in US Pat. No. 4,218,543, column 7, line 29 to column 9, line 25.
• NCO prepolymers In the preparation of the NCO prepolymers, these compounds with groups that are reactive toward isocyanate groups are reacted with simple polyisocyanates of the type mentioned above, while maintaining an NCO / OH equivalent ratio of> 1.
• the NCO prepolymers generally have an NCO content of 2.5 to 30, preferably 6 to 25% by weight. From this it can already be seen that in the context of the present invention under “NCO prepolymers” or under “prepolymers with terminal isocyanate groups” both the reaction products as such and their mixtures with excess amounts of unreacted starting polyisocyanates, which are often also called “semiprepolymer”. are to be understood.
• Polyisocyanate components which are particularly preferred according to the invention are the technical polyisocyanates customary in polyurethane chemistry, ie hexamethylene diisocyanate, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane (isophorone diisocyanate, abbreviated: IPDI), 4,4'-diisocyanato-dicyclohexylmethane, 4,4'-diisocyanatodiphenylmethane, its mixtures with the corresponding 2,4'- and 2,2'-isomers, polyisocyanate mixtures of the diphenylemthane series, as can be obtained by phosgenation of aniline / formaldehyde condensates in a manner known per se, the modification products of these technical polyisocyanates and especially NCO prepolymers containing biuret or isocyanurate groups of the type mentioned based on these technical polyisocyanates on the one
• a polyisocyanate component which is particularly preferred according to the invention is partially carbodiimidized diisocyanatodiphenylmethane which, owing to the addition of monomeric diisocyanate to the carbodiimide structure, also has uretonimine groups.
• the water-curing polyurethanes can contain catalysts known per se. In particular, this can be tert. Be amines that catalyze the isocyanate / water reaction and not a self-reaction (trimerization, allophanatization) (DE-A 23 57 931). Examples include tert. amine-containing polyethers (DE-A 26 51 089), low molecular weight tert. Amines like or dimorpholine diethyl ether or bis (2,6-dimethylmorpholino) diethyl ether (WO 86/01397. The content of catalyst, based on the tertiary nitrogen, is generally 0.05 to 0.5% by weight, based on the polymer resin.
• Water-curing polyvinyl resins can be, for example, vinyl compounds which consist of a hydrophilic prepolymer with more than one polymerizable vinyl group in which a solid, insoluble vinyl redox catalyst is incorporated, one component of which is encapsulated by a water-soluble or water-permeable shell.
• a redox catalyst is, for example, sodium bisulfite / copper (II) sulfate, in which, for example, the copper sulfate is encapsulated with poly-2-hydroxyethyl methyl acrylate.
• Polyvinyl resins are described, for example, in EP-A 01 36 021. Water-curing polyurethanes are preferred.
• the water-curing plastic resins can contain additives known per se, such as e.g. Leveling agents, thixotropic agents, defoamers and lubricants.
• plastic resins can be colored or, if desired, contain UV stabilizers.
• additives examples include: polydimethylsiloxanes, calcium silicates of the aerosil type, poly waxes (polyethylene glycols), UV stabilizers of the ionol type (DE-A 29 21 163), color pigments such as carbon black, iron oxides, titanium dioxides or phthalocyanines.
• additives which are particularly suitable for polyurethane prepolymers are described in the Plastics Manual, Volume 7, Polyurethanes, pages 100 to 109 (1983). They are generally added in an amount of 0.5 to 5% (based on the resin).
• a process for the production of the textile fabrics according to the invention with a water-curing reactive resin was also found, which is characterized in that the textile is produced from organic fibers with a modulus of elasticity in the range from 200 to 2500 daN / mm 2, an extensibility in the longitudinal direction of more than 10%, then impregnated and / or coated with the water-hardening plastic resin.
• the textile that is to say the woven or knitted fabric, can be produced in a manner known per se.
• the extensibility in the longitudinal direction can preferably be set by thermal shrinkage or wet treatment.
• thermal shrinkage is known per se and can be carried out either in a drying oven with warm air and in special ovens with superheated steam.
• the residence time of the material to be shrunk is generally 0.1 to 60 minutes, preferably 0.5 to 5 minutes, in the heated area.
• the fabrics according to the invention can be used particularly preferably for support bandages in the medical and veterinary field. They are extremely easy to put on, which is shown by the fact that both human and animal extremities can be wrapped wrinkle-free in difficult areas such as knees, elbows or heels.
• the fabrics according to the invention Compared to the known bandages made of glass fibers, the fabrics according to the invention, with superior strength, have the advantage of being lighter in weight. In addition, they do not form sharp edges, burn without residue and do not form glass dust when removing them with a saw or when processing them. A particular advantage is the increased X-ray transparency. Compared to bandages made of glass fibers, the flat structures according to the invention do not break even with severe deformation.
• the textile fabrics according to the invention which are impregnated and / or coated with a water-curing plastic resin, are generally stored in the absence of moisture.
• the textile backing materials (Example 2) are coated with the resins listed below.
• the characteristics of the textile backing material used are summarized in Table 1.
• the carrier material is thermally shrunk to achieve optimal elongation, for example 5 minutes at 110 ° C with steam or 10 minutes at 135 ° C with hot air in a drying cabinet. If necessary, the actual processing step is dried again at 110 ° to 190 ° C in order to completely remove residual moisture.
• the prepolymers I to IV are coated in a dry cabin, the relative humidity of which is characterized by a water dew point of below -20 ° C.
• the coating with resin is carried out in such a way that the weight of the desired length of the knitted textile tape is determined (for example 3 m or 4 yards) and then the amount of prepolymer required for adequate bonding is calculated and applied to the knitted tape.
• This coating can be carried out by dissolving the prepolymer in a suitable inert solvent (for example methylene chloride or acetone), soaking the knitted tape and then removing the solvent in vacuo.
• a suitable inert solvent for example methylene chloride or acetone
• the resin can also be applied using suitable roller impregnation units or slide nozzles.
• Such impregnation devices are described, for example, in US Pat. No. 4,502,479 and US Pat. No. 4,427,002.
• the level of the resin content depends on the intended use. For use as synthetic support bandages, the resin content is 35 to 65%, while for technical use as insulation or sealing a complete impregnation of all mesh openings may be desirable (application amount of more than 65%) (Order quantity based on total weight).
• the coated strips cut to length are then rolled up in the relaxed state and sealed in a water vapor-impermeable film.
• the film bag is opened and the roll is immersed in water.
• the dripping wet roll is then wound into the desired shaped body in one operation.
• the processing time of the polyurethane prepolymer preferred according to the invention is approximately 2 to 8 minutes.
• the elongation of the uncured coated tape is given in Table 1.
• test specimens are wound, which have an inner diameter of 76 mm and consist of 10 layers, which are arranged flush on top of each other.
• the test specimens are stored at 40 ° C. for 24 hours and then at 21 ° C. for 3 hours. Then they are crushed in a pressure-stretching machine (type Zwick No. 1484) between two plates in the radial direction (parallel to the cylinder axis), whereby maximum force F and the associated deformation distance are recorded (feed speed 50 mm / min).
• Results Test specimen from example * F Max [N] Deformation path [mm] 3rd 1300 15 4th 377 18th 12 840 60 11 833 50 13 1310 20th 14 258 16 *) Excess tape is discarded.
• test specimens are wound, which have an inner diameter of 45 mm and consist of 7 layers, which are arranged flush on top of each other. To determine the breaking strength, they are deformed 20% (9 mm) analogously to Example 19 in a pressure-stretching machine. The required force F is determined. Results: Test specimen from Ex. rated force F [N] at 20% deformation 3rd 1050 4th 180 7 1010 8th 960 9 900 10th 1120
• test specimens are wound, which have an inner diameter of 76 mm and consist of 8 layers, which are arranged flush on top of each other. To determine the breaking strength, they are deformed analogously to Example 19 in a pressure-stretching machine, with both the force being measured at 20% and 50% deformation. Results: Test specimen from Ex. Measured force F [N] at 20% deformity. at 50% deformity. 3rd 892 1052 4th 185 264 5 236 447 6 404 587 12 370 770
• Examples 19, 20 and 21 illustrate that elongate textile backing materials which consist of high-strength polyester fibers are at the level of the glass fiber tapes in terms of breaking strength, although they are advantageously about 1/2 to 1/3 in weight and even about 1 in terms of modulus of elasticity / 7 are lower.
• extensible textile backing materials are quite capable of replacing extensible glass fiber backing materials, because in addition to their good breaking strength properties due to the extensibility, they also have the same good application behavior,
• disadvantages such as rejected X-ray transparency, sharp edges and the dangerous glass dust do not have.
• the example shows that the breaking strength is independent of the type of resin (test specimens from Examples 15 and 16). Furthermore, that high-strength polyfile polyester fibers are clearly superior to normal polyester staple fibers (staple yarns) (test specimens from Examples 17 and 18).

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Laminated Bodies (AREA)
• Materials For Medical Uses (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (3)

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Family Applications (1)

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Citations (7)

Family Cites Families (12)

• 1987
  • 1987-08-07 DE DE19873726268 patent/DE3726268A1/de not_active Withdrawn
• 1988
  • 1988-06-08 NO NO882524A patent/NO176615C/no not_active IP Right Cessation
  • 1988-06-14 ES ES88109418T patent/ES2042650T3/es not_active Expired - Lifetime
  • 1988-06-14 EP EP19880109418 patent/EP0301214B1/fr not_active Expired - Lifetime
  • 1988-06-14 DE DE88109418T patent/DE3883660D1/de not_active Expired - Lifetime
  • 1988-06-14 AT AT88109418T patent/ATE93909T1/de not_active IP Right Cessation
  • 1988-06-17 US US07/208,348 patent/US4940047A/en not_active Expired - Lifetime
  • 1988-06-17 JP JP14839388A patent/JPS6414377A/ja active Pending
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