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 for medical support bandages, 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 field.
• EP-A-0021004 describes i.a. orthopedic support bandages, which are only stretchable in the transverse direction. As a result, wrinkle-free donning, particularly with angled limbs, is hardly possible.
• the teaching of US-A-4688563 can only partially overcome this disadvantage, since it teaches the production of orthopedic support bandages which also have a longitudinal extension, but the bandages described there are produced on the basis of glass fibers, as a result of which the disadvantages associated with glass fibers are produced how bad X-ray transparency and strong tendency to dust when removing the dressing etc. have to be accepted.
• 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.
• glass fiber substrates have been used (US-A-45 02 479).
• these known carrier materials are only stretchable in the transverse direction, but practically rigid in the longitudinal direction in order to achieve greater stability (US-A-45 02 479, column 3, lines 45 to 47).
• a disadvantage of the carrier materials, which can only be stretched in the transverse direction, is the occurrence 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-A-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.
• Orthopedic support bandages have been found 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 900 to 2000 daN / mm2 and, prior to curing, an extensibility in the longitudinal direction of 15-200% exhibit.
• the support bandages according to the invention have not only an elongation in the transverse direction but also an elongation 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 course.
• the support bandages 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 support bandages according to the invention are polyester fibers.
• the fibers for the support bandages 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.
• Polyfile textured polyester filament yarns are used to achieve 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, both staple fiber yarns and polyfile filament yarns (plain yarn) made of polyester can be used.
• the strength of these yarns is characterized by the modulus of elasticity (modulus of elasticity).
• the orthopedic support bandages according to the invention generally have an extensibility in the longitudinal direction of 15 to 200%, preferably 15 to 80%, before the reactive resin cures. Elongation in the longitudinal direction means the change in length compared to the fully relaxed support bandage, which is achieved when the orthopedic support bandage is loaded with 10 N per cm width in the longitudinal direction. Such measurements can be carried out, for example, in accordance with DIN 61 632 (April 1985).
• the support bandages 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 cured.
• the orthopedic support bandages according to the invention generally have a weight per square meter of 40 to 300 g, preferably 100 to 200 g.
• Textiles made of fibers are used as the support bandages according to the invention, the elongation of which has been adjusted by a shrinking process.
• the orthopedic support bandages according to the invention consist in the longitudinal direction of polyfilen, textured polyester filament threads and in the transverse direction of fibers of high-strength polyester fibers, preferably polyethylene terephthalates, with an elastic modulus of 900 to 2000 daN / mm2.
• the modulus of elasticity can be determined by methods known per se (synthetic fibers, pages 63 to 68 (1981), Verlag Chemie, Weinheim).
• the processing forms of the orthopedic support bandages according to the invention can be woven, knitted, knitted 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 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-isocyanatomethylcyclohexane, 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, di
• Suitable higher molecular weight polyisocyanates are modification products of such simple polyisocyanates, ie polyisocyanates with e.g. Isocyanurate, carbodiimide, allophanate, biuret or uretdione structural units, such as can be prepared from the simple polyisocyanates of the above-mentioned general formula mentioned by way of example by methods known in the art.
• 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 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.
• 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 diphenylmethane 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 biochemical groups and isocyanurate groups and in particular NCO prepolymers of the type mentioned based on these technical polyisocyanates on the one hand
• Isocyanates with aromatically bound NCO groups are preferred according to the invention.
• a polyisocyanate component which is particularly preferred according to the invention is partially carbodiimidized diisocyanatodiphenylmethane, which also has uretonimine groups as a result of the addition of monomeric diisocyanate to the carbodiimide structure.
• 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 catalyst content, 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, polywaxes (polyethylene glycols), UV stabilizers of the ionol type (DE-A 29 21 163), color pigments such as carbon black, iron oxides, titanium dioxide 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 orthopedic support bandages according to the invention with a water-curing reactive resin has also been found, which is characterized in that the textile is produced from the polyester fibers described, an extensibility in the longitudinal direction of 15 to 200% and in the transverse direction of 20-300% is set and then impregnated and / or coated with the water-curing 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 support associations according to the invention can be used for support associations 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 support bandages according to the invention Compared to the known bandages made of glass fibers, the support bandages 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 support bandages according to the invention do not break even with severe deformation.
• the orthopedic support bandages according to the invention which are impregnated and / or coated with a water-hardening plastic resin, are generally stored in the absence of moisture.
• the textile backing materials (Example 2) are coated with the resins listed below.
• 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 in such a way that the prepolymer is dissolved in a suitable inert solvent (for example methylene chloride or acetone), the knitted tape is soaked with it and the solvent is then removed in vacuo.
• a suitable inert solvent for example methylene chloride or acetone
• the resin can also be applied using suitable roller impregnation units or slot nozzles.
• Such impregnation devices are described, for example, in US-A-4,502,479 and US-A-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 applications 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 specimen has an inside diameter of 76 mm and consists 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).
• Test specimen from example * F Max [N] Deformation path [mm] 3rd 1300 15 4th 377 18th 12th 840 60 13 1310 20th *) 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 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 Measured force F [N] E.g. at 20% deformity. at 50% deformity. 3rd 892 1052 4th 185 264 5 236 447 6 404 587
• 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 poor X-ray transparency, sharp edges and the dangerous glass dust do not have.
• Test specimen Measured force F [N] E.g. at 20% deformity. at 50% deformity. 15 220 349 16 223 376 17th 280 435 18th 163 175 (broken)
• 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)

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