Self-adhesive elastic bandage that can be used, in particular, for the treatment and prevention of diseases of the veins
A self-adhesive compression bandage, in particular for the treatment and prevention of pathologies of venous origin and lymphedema. This bandage is manufactured by the assembling of two self-adhesive nonwovens based on short conjugate fibers which have been crimped. The fibers are preferably made of polyester. The bandage can in addition comprise a supplementary layer.
1. A compression bandage comprising two nonwovens of crimped fibers obtained from short conjugate fibers, in which:
the two nonwovens are assembled together and have, independently of one another, a grammage of between 70 g/m 2 and 300 g/m 2 ,
the crimped fibers are uniformly crimped in a thickness direction of the nonwovens, and exhibit a mean curvature radius of between 10 and 200 micrometers, and
a surface of each of the nonwovens having between 10 and 50 crimped fibers/cm 2 .
2. The compression bandage as claimed in claim 1 , wherein the short conjugate fibers are bicomponent fibers that are made of two polymer components which exhibit a softening point greater than or equal to 100° C., and which are selected from the group consisting of polypropylene polymers, polyester polymers and polyamide polymers.
3. The compression bandage as claimed in claim 2 , wherein the bicomponent fibers are composed of a first polymer which is a polyethylene terephthalate and of a second polymer which is a copolymer of an alkylene arylate with isophthalic acid and/or diethylene glycol.
4. The compression bandage as claimed in claim 2 , wherein the two polymer components consist of two different aromatic polyester polymers.
5. The compression bandage as claimed in claim 1 , wherein the short conjugate fibers have a mean count of between 1 and 5 dtex, and a mean length of between 10 and 100 mm.
6. The compression bandage as claimed in claim 1 , wherein the crimped fibers exhibit a mean curvature radius of between 50 and 160 microns.
7. The compression bandage as claimed in claim 1 , wherein each nonwoven has, independently of one another, a grammage of between 80 and 200 g/m 2 .
8. The compression bandage as claimed in claim 1 , wherein the surface of each of the nonwovens has is between 10 and 35 crimped fibers/cm 2 .
9. The compression bandage as claimed in claim 1 , wherein each nonwoven exhibits, in a cross-section taken parallel to the thickness direction thereof,
a fiber incurvation ratio greater than or equal to 1.3, and
a ratio between a minimum value of the fiber incurvation ratio and a maximum value of the fiber incurvation ratio greater than 75%,
wherein said ratio and said fiber incurvation ratio are measured in three parts of the nonwovens, each part corresponding to one third thereof in a cross-section taken perpendicular to the thickness direction of the nonwovens.
10. The compression bandage as claimed in claim 1 , further comprising a supplementary layer selected from the group consisting of a textile material, a cellular material, a film, and their combinations.
11. The compression bandage as claimed in claim 10 , wherein the supplementary layer is a textile material that is a nonelastic nonwoven which exhibits a thickness greater than 1.8 mm.
12. The compression bandage as claimed in claim 11 , wherein the nonelastic nonwoven is an absorbent nonwoven which exhibits a thickness between 1.8 and 4 mm.
13. The compression bandage as claimed in claim 11 , wherein the nonelastic nonwoven is an absorbent nonwoven which exhibits a thickness between 2 and 3 mm.
14. The compression bandage as claimed in claim 10 , wherein the supplementary layer is a hydrophilic polyurethane foam or a padding.
15. The compression bandage as claimed in claim 10 , wherein the two nonwovens are needled with the supplementary layer which is a padding exhibiting a thickness between 2 and 3 mm.
16. The compression bandage as claimed in claim 1 , wherein the nonwovens are assembled by needling, with an adhesive or by ultrasound.
17. The compression bandage as claimed in claim 1 , wherein the nonwovens comprise bicomponent fibers that are based on aromatic polyester polymers, each nonwoven having a grammage between 90 and 150 g/m 2 and the surface of each nonwoven having between 10 and 35 crimped fibers/cm 2 .
18. The use of a compression bandage as claimed in claim 1 , comprising applying the compression bandage to a limb of a patient.
19. The compression bandage as claimed in claim 1 , wherein the short conjugate fibers have a mean count between 1.5 and 3 dtex, and a mean length between 40 and 60 mm.
20. The compression bandage as claimed in claim 1 , wherein the crimped fibers exhibit a mean curvature radius of between 70 and 130 micrometers.
21. The compression bandage as claimed in claim 1 , wherein each nonwoven has, independently of one another, a grammage of between 90 and 150 g/m 2 .