FR3020568A1 - METHOD FOR MANUFACTURING A CONTENT ARTICLE SUCH AS A MEDICAL COMPRESSION BASE AND ARTICLE OF CONTENTION OBTAINED ACCORDING TO SAID METHOD - Google Patents

Abstract

The present invention relates to a method of manufacturing a restraining article comprising an elastic knit tubular portion for compressing a limb such as a leg or an arm for example; said method is remarkable in that it consists in producing a knitted stitch from at least one said structure yarn (5), said knitted stitch forming a supporting structure, and depositing on said supporting structure at least one said yarn fragile (6) whose tenacity is less than or equal to 20 cN / tex and / or the breaking force is less than or equal to 250 cN and / or the elongation at break is less than or equal to 10%, said yarn fragile (6) being superimposed on the structure wire (5) of the mesh. Another object of the invention relates to a compression article obtained according to the method.

Description

TECHNICAL FIELD The present invention relates to the field of treatments for venous pathologies, more particularly that involving the use of articles of the invention. so-called compression or compression such as medical compression stockings called BMC. The invention more specifically relates to comfortable compression articles and a method of manufacturing such compression articles. PRIOR ART A compression article within the meaning of the present description means all the tubular compressive orthoses made of a knitted elastic textile material, with the exception of bandages, and more particularly those compressive of one or two lower limbs.

These compression articles, and more particularly the compression stockings, are generally used to treat certain circulatory pathologies such as venous insufficiency or lymphoedema, for example, or, in the sports field, to prevent the blood from accumulating in the legs. and thus facilitate the recovery, said contention articles being worn during and after a long-term effort. By the term "bottom" is meant any compression article used for lower limbs such as socks, tights, tapes. A compression stocking is a stocking with sufficient elasticity to compress the lower limbs of a user and replacing the deficiency of the vein walls. Venous compression increases the speed of venous flow by an increase in venous pressure, when in some postures of the user it is low or almost nonexistent. Of course, the pressure exerted by the stockings on the lower limbs must be adapted to the use. Indeed, compression stockings for medical use - 2 - often exert a high compression and high degression, that is to say a different pressure at both ends and with a very large pressure difference, to boost circulation blood that is defective. The term degressivity means any pressure decrease from a distal point, here the ankle or malleolus to a proximal point, here the popliteal fossa. Such compression on the lower limbs is not recommended for users without venous problems, especially some athletes, who use compression stockings during the effort to accelerate blood oxygenation and improve their sports performance, but also after the effort, during the recovery time, to evacuate accumulated toxins and prevent muscle cramps. All these compression stockings, although giving satisfaction with regard to the rate of contention, have the disadvantage of being uncomfortable for some users. However, the concept of comfort for the user is important because compliance depends on this comfort. Indeed, a patient tends not to wear the compression stockings if its wearing is too uncomfortable. It is known, moreover, the British patent GB 464073 which describes an elastic compression stocking obtained in tulle in which the warp son and / or the connecting son are rubber. According to an alternative embodiment, the tulle binding son may be cotton, linen or the like. In addition, the warp son and the son of connection can be of different thicknesses. Tulle means a fabric formed by a network of regular meshes of fine threads.

Although this type of compression stocking has the advantage of being light and airy, providing greater comfort for the user, it does not provide a compression adapted for the treatment of venous pathologies. SUMMARY OF THE INVENTION One of the aims of the invention is therefore to remedy this drawback by proposing a method of manufacturing compression articles and compression articles of simple and inexpensive design, providing a compression adapted to the treatment of venous pathologies while ensuring comfort for the user and, incidentally, providing additional therapeutic effects such as healing and / or soothing properties of the skin.

For this purpose, and in accordance with the invention, there is provided a method of manufacturing a restraining article comprising a resilient knit tubular portion for compressing a limb such as a leg or arm for example; said method is remarkable in that it consists in producing a knitted stitch from at least one said structure yarn, said knitted stitch forming a supporting structure, and depositing on said supporting structure at least one so-called fragile yarn whose tenacity is less than or equal to 20 cN / tex and / or the breaking force is less than or equal to 250 cN and / or the elongation at break is less than or equal to 10%, said fragile wire being superposed on the wire of structure of the mesh.

Said structural yarn and the fragile yarn are knitted simultaneously. In addition, the tension applied to the wire structure forming the mesh is greater than the tension applied to the fragile wire during knitting.

Preferably, the voltage applied to the fragile wire is between 0 and 1 g. In addition, the fragile wire is deposited on the structure of the mesh one rank out of two. Said structural yarn consists of a yarn or a set of yarns covered or assembled and said fragile yarn consists of a yarn of yarn comprising all or part of natural fibers. Said natural fibers consist of cotton and / or linen and / or hemp and / or wool and / or silk.

Another object of the invention consists in a compression article comprising a tubular elastic knit portion for compressing a member such as a leg or an arm, for example, which is remarkable in that it comprises a knitted stitch from at least one so-called structure yarn, said knitted mesh forming a carrier structure, and at least one so-called fragile yarn whose tenacity is less than or equal to 20 cN / tex and / or the force at break is less than or equal to at 250 cN and / or the elongation at break is less than or equal to 10%, deposited on the support structure, said fragile wire being superimposed on the wire structure of the mesh. Said wire structure forming the mesh has a voltage greater than the tension of the fragile wire and, preferably, the fragile wire has a voltage of between 0 and 1g.

Moreover, the article of contention comprises a fragile wire deposited on the structure of the mesh one rank out of two. Said structural yarn consists of a yarn or a set of yarns covered or assembled and said fragile yarn consists of a yarn of yarn comprising all or part of natural fibers. Said natural fibers consist of cotton and / or linen and / or hemp and / or wool and / or silk.

SUMMARY DESCRIPTION OF THE FIGURES Other advantages and features will become more apparent from the following description, of several alternative embodiments, given by way of non-limiting examples, of the article of contention according to the invention, from the drawings. appended in which: - Figure 1 is a schematic perspective representation of a compression article of the type compression medical stock (BMC), according to the invention - Figure 2 is a top view of the mesh of the article According to the invention, FIG. 3 is a view from above of an alternative embodiment of the mesh of the article of contention according to the invention. DETAILED DESCRIPTION OF THE INVENTION In the remainder of the description of the article of contention according to the invention, the same numerical references designate the same elements. In addition, the different views are not necessarily drawn to scale. Hereinafter will be described a compression stocking; However, it is obvious that the invention may extend to any compression article such as a compression stocking or a compression sleeve for the arm or hand without departing from the scope of the invention. Referring to Figures 1 and 2, the compression stocking (1) comprises a tubular portion (2), a foot (3) and a heel (4) of elastic knit, the foot (3), the heel (4) and the tubular part (2) being knitted in one piece on a circular or straight knitting machine or any other equivalent machine well known to those skilled in the art. The mesh of the compression stocking consists, with reference to FIG. 2, of a knitted stitch from a so-called structural yarn (5), said knitted stitch forming a load-bearing structure, and a so-called fragile yarn (6) deposited on the carrier structure, said fragile wire (6) being superimposed on the structure wire (5) of the mesh. Brittle wire means a wire whose tenacity is less than or equal to 20 cN / tex and / or the breaking force is less than or equal to 250 cN and / or the elongation at break is less than or equal to 10% . According to an essential characteristic of the invention, the structure wire (5) forming the mesh has a voltage greater than the tension of the fragile wire (6), and, preferably, the fragile wire (6) has a tension of between 0 and lg, i.e. almost zero voltage. In this way, the fragile wire (6) follows the mesh of the structural wire (5) without participating in the development of the mesh insofar as the stresses applied between the structural wire (5) and the fragile wire (6). ) are different. Said structural wire (5) is preferably in a thread or a set of gimped or assembled son with or without elastane. However, it is obvious that the structural wire (5) may consist of any elastic wire or not well known to those skilled in the art. In addition, the fragile yarn (6) consists of a yarn made of yarn comprising all or part of the natural fibers. The term "spun yarn" refers to a yarn consisting of short staple fibers held together by twisting. It will be noted that the fragile wire may comprise artificial fibers, such as fibers derived from cellulose for example, which are well known to those skilled in the art without departing from the scope of the invention. Advantageously, the fragile yarn (6) consists of a yarn of flax fibers providing soothing and healing properties of the skin. It goes without saying that the natural fibers forming the fragile wire (6) may consist of any natural fibers well known to those skilled in the art such as cotton, hemp, wool or silk, for example, or a combination of these fibers, without departing from the scope of the invention. Furthermore, in this particular embodiment, the mesh comprises a fragile wire (6) deposited on the structure wire (5) on each row of the mesh; However, it is obvious that, according to an alternative embodiment, not shown in the figures, the mesh may comprise a fragile wire (6) deposited on the structure wire (5) every other rank, one rank out of three, etc ... without departing from the scope of the invention.

It will be observed that the fragile wire (6) will preferably be deposited on the structural wire (5) so that it preferably extends at the bottom of the compression stocking (1), that is, on the underside of the compression stocking (1) in contact with the patient's skin. Nevertheless, since the fragile wire (6) is deposited on the structure wire (5) with a voltage that is almost zero, said fragile wire (6) can be placed at the location of the compression bottom (1), the position of the fragile wire (6) being difficult to control. According to an alternative embodiment of the compression stocking according to the invention, with reference to FIG. 3, the mesh of the compression stocking consists, in the same manner as above, in a knitted stitch from a structural yarn ( 5), said mesh forming a carrier structure, and a so-called fragile yarn (6) whose tenacity is less than or equal to 20 cN / tex and / or the breaking force is less than or equal to 250 cN and / or the elongation at break is less than or equal to 10%, deposited on the support structure, said fragile wire (6) being superimposed on the structure wire (5) of the mesh. Said structure wire (5) forming the mesh has a voltage greater than the tension of the fragile wire (6), and preferably a voltage at least twice the tension of the fragile wire (6). Said structural wire (5) is preferably in a thread or a set of gimped or assembled son with or without elastane. On the other hand, the fragile yarn (6) consists of a spun yarn comprising all or part of the natural fibers, said natural fibers consisting of all natural fibers well known to those skilled in the art such as cotton, hemp, flax, wool or silk, or a combination of these fibers. Furthermore, the mesh comprises a fragile wire (6) deposited on the structure wire (5) on each row or on certain rows only.

This variant of execution differs from that previously described in that the mesh comprises a weft thread (7) elastic to strengthen the mesh and provide the necessary compression. Said weft yarn (7) consists, preferably, in a yarn comprising an elastic core of minimum title 310 dtex and having a double cover. Finally, it is quite obvious that the examples which we have just given are only particular illustrations and in no way limiting as to the field of application of the invention.

Claims (9)

CLAIMS 1- A method of manufacturing a compression article comprising a tubular elastic knit portion for compressing a member such as a leg or an arm, for example, characterized in that it consists in producing a knitted stitch from at least one said structure yarn (5), said knitted mesh forming a supporting structure, and to deposit on said supporting structure at least one so-called fragile yarn (6) whose tenacity is less than or equal to 20 cN / tex and / or the breaking force is less than or equal to 250 cN and / or the elongation at break is less than or equal to 10%, said fragile wire (6) being superimposed on the structure wire (5) of the mesh. 2- Method according to the preceding claim characterized in that the structural wire (5) and the fragile wire (6) are knitted simultaneously. 3- A method according to claim 2 characterized in that the voltage applied to the wire structure (5) forming the mesh is greater than the tension applied to the fragile wire (6) during knitting. 4- A method according to claim 3 characterized in that the voltage applied to the fragile wire (6) is between 0 and lg. 5- A method according to any one of claims 1 to 4 characterized in that the fragile wire (6) is deposited on the structure wire (5) of the mesh every other row. 6. Process according to any one of claims 1 to 5 characterized in that the structural wire (5) consists of a wire or a set of son gimped or assembled. 7- A method according to any one of claims 1 to 6 characterized in that the fragile wire (6) consists of a yarn of fiber yarn comprising all or part of natural fibers. 8- Process according to claim 7 characterized in that the natural fibers consist of cotton and / or linen and / or hemp and / or wool and / or silk. 9-9- A compression article comprising a tubular elastic knit portion for compressing a limb such as a leg or an arm, for example, characterized in that it comprises a knitted stitch in at least one so-called structure yarn (5). ), said knitted mesh forming a carrier structure, and at least one so-called fragile yarn (6) whose tenacity is less than or equal to 20 cN / tex and / or the force at break is less than or equal to 250 cN and / or the elongation at break is less than or equal to 10% deposited on the supporting structure, said fragile wire (6) being superimposed on the structure wire (5) of the mesh. - Article of contention according to claim 9 characterized in that the wire structure (5) forming the mesh has a voltage greater than the tension of the fragile wire (6). 11- contention article according to claim 10 characterized in that the fragile wire (6) has a tension between 0 and lg. 12 - Article of contention according to any one of claims 9 to 11 characterized in that it comprises a fragile wire (6) deposited on the structure wire (5) of the mesh one row out of two. 13 - Article of contention according to any one of claims 9 to 12 characterized in that the structural wire (5) consists of a wire or a set of son gimped or assembled. 14 - Article of contention according to any one of claims 9 to 13 characterized in that the fragile wire (6) consists of a spun yarn of fibers comprising all or part of natural fibers. 15 - Article of contention according to claim 14 characterized in that the natural fibers consist of cotton and / or linen and / or hemp and / or wool and / or silk.