COMPRESSION BANDAGE AND COMPRESSION BANDAGE COMBINATION

Abstract

The invention relates to a compression bandage comprising a nonwoven-based bandage layer that has been stitched over with elastic textile threads by stitch bonding methods, the textile threads being heat-shrinkable and not elastomeric and the compression bandage having an elasticity after heat shrinking of the textile threads by 50-200%, particularly 50% to 90% and especially 50% to 70%. The invention also relates to a compression bandage combination.

Claims

1. A compression bandage comprising a nonwoven-based bandage layer overstitched by elastic textile threads by means of a stitch-bonding process, wherein the textile threads are heat-shrinkable and non-elastomeric and wherein the compression bandage has elastic extensibility after the textile threads have been heat-shrunk by 50-200%.

2. The compression bandage of claim 1, wherein the bandage layer consists of a chemically, thermally and/or mechanically consolidated nonwoven fabric.

3. The compression bandage of claim 1, wherein the nonwoven bandage layer is a nonwoven fabric which is non-elastic or stretch-elastic.

4. The compression bandage of claim 1 wherein the textile threads are textured polyamide yarns and/or textured polyester yarns and/or polyethylene phthalate and/or polybutylene terephthalate or combinations thereof.

5. The compression bandage of claim 1, wherein the nonwoven-based bandage layer is formed from a fibrous nonwoven comprising cotton, wool, viscose, polyamide, polyester, acrylic, polyolefin or mixtures of said fibers.

6. The compression bandage of claim 1, wherein the nonwoven-based bandage layer comprises a spunbond fabric selected from the consisting of polyamide, polyester, polyolefin, acrylic and mixtures thereof.

7. The compression bandage of claim 1, wherein the stitch length of the elastic textile threads in the stitch-bonding process is 2 to 5 mm per revolution with a stitching thread tension of not more than 10 cN.

8. The compression bandage of claim 1, wherein the extensibility of the compression bandage, measured in accordance with DIN 61632, is from 40 to 100% in the longitudinal direction (MD).

9. A compression bandage combination comprising a first, inner bandage (12) and a second, outer bandage which second, outer bandage is the compression bandage of claim 1, wherein the second outer bandage is appliable over the first, inner bandage (12), and wherein the first, inner bandage comprises a first section (L1) that has a padding layer at least on its side facing the skin of a wearer and a cohesively adhering second section (L2).

10. The compression bandage combination of claim 9 wherein the two sections (L1, L2) of the first, inner bandage (12) are joined to one another and adjoin one another in the longitudinal direction of the bandage (12) or completely or partially cover one another.

11. The compression bandage combination of claim 9, wherein the first bandage comprises a first, padding layer (21) and a second, support layer (22), the two layers (21, 22) being joined to one another in the unstretched state by means of a stitch-bonding process via an elastic stitching thread, the stitch length being 1.5 to 3 mm/rev with a stitching thread tension of not more than 4 cN.

12. The compression bandage combination of claim 9, wherein the first, inner bandage comprises a first, padding layer (21) and a second support layer (22) and the material of one or both of the layers (21, 22) of the first, inner bandage is non-elastic.

13. The compression bandage combination of claim 9, wherein the first, inner bandage comprises a first, padding layer (21) and a second support layer (22) and at least one of the two layers (21, 22)—the padding layer (21) and the support layer (22)—are composed of a nonwoven material.

14. The compression bandage combination of claim 9, wherein the first, inner bandage comprises a first, padding layer (21) and a second support layer (22) and wherein the padding layer (21) is a thermal fusion nonwoven.

15. The compression bandage combination of claim 9 wherein the first, inner bandage and second outer bandage overlap completely.

16. A process for producing a compression bandage as claimed in claim 1, comprising overstitching a nonwoven-based bandage layer with elastic textile threads in a stitch-bonding process, and heat treating the overstitched bandage layer to result in shrinkage of the textile threads of between 50 and 200.

17. A process of treating any one of venous disorders, chronic venous insufficiency, and venous leg ulcers optionally in the presence of concomitant peripheral arterial occlusive disease comprising utilizing the compression bandage of claim 1.

18. The compression bandage of claim 1, wherein the compression bandage has elastic extensibility after the textile threads have been heat-shrunk by 50% to 90%.

19. The compression bandage of claim 1, wherein the compression bandage has elastic extensibility after the textile threads have been heat-shrunk by 50% to 70%.

20. The compression bandage combination of claim 15, wherein the first, inner bandage and second outer bandage overlap edge-to-edge and are adhesively joined to one another over the entire extension range of 0 to D.sub.fix.

Description

[0070] In the drawings:

[0071] FIG. 1 shows a process for producing a compression bandage of the invention and

[0072] FIG. 2 shows a process for producing a first bandage of a compression bandage combination of the invention.

[0073] FIG. 1 shows a process for producing a compression bandage of the invention, said bandage also being capable of serving as an outer bandage for a compression bandage combination of the invention. Here, the reference numeral 10 denotes a nonwoven material to be supplied, more particularly a thermal bond nonwoven material, which is supplied to a stitch-bonding device via conveying devices 4. The reference numerals 1, 2, and 3 indicate the stitch-bonding device, which is a conventional stitch-bonding device for carrying out overstitching by the Maliwatt or Malimo process. For this, elastic stitching threads are fed in via the rollers, which are indicated by 6. The overstitched and thus elasticized nonwoven is rolled up at reference numeral 5. This can then be followed by assembly of a compression bandage of the invention.

[0074] A first preferred exemplary embodiment is shown in the table below:

EXEMPLARY EMBODIMENT OF A COMPRESSION BANDAGE

[0075]

TABLE-US-00001 Base nonwoven Fibrous nonwoven (staple fiber nonwoven) composed of cotton, wool, viscose, polyamide, polyester, acrylic, polyolefin or mixtures of said fibers (mechanically or chemically bonded) Or Spunbond composed of polyamide, polyester, polyolefin, acrylic or mixtures thereof Basis weight/color of base 20-40 g/m.sup.2, white or colored nonwoven Structure of base nonwoven Smooth or open-pored or perforated or embossed Stitching thread 78 dtex to 320 dtex textured multifilament yarn composed of polyamide 6, 6.6, polyester, polyethylene terephthalate, polybutylene terephthalate Color of stitching thread White, colorless/transparent or colored Stitching thread density 24 to 96 threads per 10 cm width Stitching thread stitch 2.0 to 5.0 mm length Stitching thread binding Open fringe or closed fringe or tricot Basis weight of component B Uncoated: 25 to 80 g/m.sup.2 (DIN 61632) stretched Coated: 30 to 100 g/m.sup.2 stretched Extensibility (DIN 61632 at 40 to 100% in longitudinal K = 3 N/cm) direction (MD) 0 to 50% in transverse direction (CD)

[0076] FIG. 2 shows firstly how a padding layer 21 composed of nonwoven wadding and a support layer 22 are fed in here as a thermal bond nonwoven layer from a roll material and are joined to one another in a stitch-bonding process by means of a warp knitting machine having the reference numeral 24. The two layers are fixed to one another beforehand via a roller guide 25. The stitch-bonding process is executed using a hook, by means of which the layers are overstitched with the elastic stitching thread. The material joined together via the elastic stitching thread is then passed through a further roller guide 26 and wound onto a roll 27, it being optionally possible for preassembly in the longitudinal direction into bandages to take place. The stitching thread is an elastically pre-stretched thread, which is inserted with a specified stitch length and a specified stitching thread tension, thereby leading, after tension release in the elastic material, to contraction of the layer composite (fabric).