SU555830A3 - Orthopedic dressing - Google Patents

Description

one

This invention relates to the field of medicine.

An orthopedic dressing material is impregnated with a polymer, for example, a non-polished polyester resin, hardened with ultraviolet light for up to 30 minutes. Made of fiberglass 1.

The aim of the invention is to increase the stiffness of the dressing.

This is achieved by the fact that fiberglass is a net of average thickness of 0.89-1.53 mm. - with rectangular holes, the sides of which are 1.15-3.81 mm and fiberglass diameter 0, ОО381О, ОО457 mm.

The otopedic dressing is an air-permeable, non-irritating fabric of interwoven or knitted materials with a UV curable resin. The fabric is a grid having evenly distributed, usually rectangular holes with sides of 1.15-3.81 mm, the average thickness of the fabric is 0.89-1.53 mm, and

fiberglass threads have a diameter of 0.00381-0.00457 mm. Fibers of this diameter are less irritating to the skin of the body, they are more flexible and less breakable. In addition, the scars (in the case of tied fabric) or the base (in the case of thin fabric), when they pass over the weft threads, form periodic transitions on the surface of the material so that the formed periodic protrusions enhance the adhesion of adjacent layers of fabric.

The fabric may consist of natural, polymeric or glass yarns.

Claims (1)

The resin adheres to these threads of the fabric in an amount sufficient to wet the threads, but not sufficient to completely fill the voids or holes between the threads of the fabric. The holes pass through the entire thickness of the resin-impregnated fabric through which the UV light can pass without significant attenuation. The sides and edges of the holes formed by resin-impregnated filaments will harden when exposed to ultraviolet light. The resin used to impregnate the fabric is dry and remains flexible or mobile until cured. Impregnated soft fabric is stored in an airtight package at room temperature for more than 1 year, after which this material retains the ability to form interlayer adhesions between successive layers of the material and retains the ability to form and cure in the form of an orthopedic dressing. The preferred ultraviolet radiation band for curing the resin is a narrow band having a maximum power and the highest wavelength in the range of 3650-372 O. The most preferred resin system is a resin containing polyester, inhibitor and benzoic ethers and benzoic ethers. Polyester compounds are esters of unsaturated dicarboxylic acids, such as maleic aldehyde, saturated aromatic dicarboxylic acids, such as azophthalic acid, and aliphatic diodes, such as egylene glycol, propylene glycol, butylene glycol. The most preferred monomer is vinyl toluene. Inhibitors are commonly phenol-type aromatic materials. Unsaturated monomer is used in an amount of 5-50 wt.%. Photoinitiator substance is used in an amount of 0.10, 5 weight. % polyester. Orthopedic dressing material has breathability, ability to follow body contours, sufficient strength and compatibility with the skin. Example. The following resin is used in the orthopedic dressing band: Unsaturated polyester resin (solid content) 22480 g Vinyl toluene 6343 g 4 -.Treg 1 butylcagehol5,76 Simple benzoic methyl ether 346 g Acetone 7900 ml Applied on the fabric and applied to the fabric and to the monomers applied to the fabric and the monomers. her in a heating furnace. This resin system is distinguished by its low tackiness in the final, but uncured state. Fiberglass tapes with different hole sizes in the fabric pattern were coated or impregnated with this resinous system. The fabric 1 is a 50.8 mm wide tightly bonded glass fiber tape with an average thickness of 1.27 mm and no measurable apertures. This tape was impregnated with 44% of the resin and, after being rolled into a ring with a diameter of 50.8 mm, from three layers of impregnated fabric, required ZOmin to achieve a compressive strength of 95 kg. After 3 minutes of exposure to the same light, the three-layer ring was only partially cured and its compressive strength was only 34 kg. Fabric 2 is a tape of the same width and length, but with squares evenly spaced about with a length of 4.762 mm and with the same resinous content. In the wound state in a three-layer ring, it was completely cured by irradiation for 3 minutes and had a compressive strength of 39.3 kg. Fabric 3 — tightly bonded glass fiber tape 50.8 mm wide and 0.66 mm thick, without any measurable holes, was impregnated with 50% resin and reeled into five layers with a diameter of 50.8 mm. This tape, after 30 minutes of curing with light, showed a compressive strength of 97.4 kg. Irradiation for 6 min did not lead to full cure. The tensile strength of the ring was 18.6 kg. Fabric 4 is similar to impregnated fabric, but has square holes with a side of approximately 1.588 mm located at regular intervals of the order of 3.175 mm. A similar five-layer ring was completely cured in 6 minutes and had a compressive strength of 55.7 kg. Although the holes in the fabric and reduce the duration of curing, its ultimate strength is less than the dense fabric, because it contains less reinforcement filaments to form holes. This reduction in fabric weight per unit surface area of the fabric can be compensated for by increasing the thickness of the fabric or the weight of the thread. The ultimate strength of the laminate increases in this case. When fabric 2 with a thickness of 1.38 mm and tightly connected fabric 3 with a thickness of 0.66 mm were rarely rolled into three-layer rings, the fabric rarely had a compressive strength of 39.4 kg after irradiation for 3 minutes, and the dense fabric ring had the same strength only after 30 minutes of irradiation. Acceptable dressing materials must meet the following conditions. For low load applications, a multilayer ring of width 5O, 8 mm with an inner diameter of 5O, 8 mm must have compressive strength at four layers or less and after 3 minutes of irradiation or less. , 38.5 kg. For applications with a greater load (of a patch), a ring of six layers or less after 6 minutes of irradiation or less should have a compressive strength of at least 68 kg. In this way, an orthopedic dressing material is a multi-component orthopedic dressing system that is common to all usual cases of dressing. This system allows you to get a strong, lightweight, porous dressing band that can be immersed in water. The dressing of such a belt provides rest, protection and maintenance of a remedial position. The invention is an orthopedic dressing material, which is a glass fabric impregnated with a polymeric composition of non-adhered polyester resin, characterized in that, with the aim of increasing and rigidity of the dressing, the glass fabric is a mesh of average thickness of 0.8915, 3 mm with rectangular holes , the length of the sides of the cats | 1.15-3.81 mm and fiberglass fiber diameter 0,003810, O0457 mm .: Sources of information taken into account during the examination: 1. German patent number 1804753, cl. 30 d, 21. 1968.