Hybrid fabric
This invention relates to a hybrid fabric comprising at least one structural fiber having a first melting temperature range and at least one thermo-formable fiber of having a second melting temperature range which is lower than the first melting temperature range to such an extent that the structural fiber does not melt in the second melting temperature range of the thermo-formable fiber. The hybrid fabric comprises (1) a first network comprising the structural fibers, (2) a second network comprising the thermo-formable fibers, the thermo-formable fibers comprising non-relaxed fibers made of a thermoplastic material, and (3) a plurality of openings between the fibers of the first and second network. The structural and thermo-formable fibers of respectively the first and second network interpenetrate one another and are connected to each other over at least part of the first and second network at a plurality of knot positions in the fabric where the structural and thermo-formable fibers are interwoven.
1. An immobilisation device for immobilizing a body part in a certain position, the immobilization device comprising:
a hybrid woven or knitted fabric, comprising at least one structural fiber having a first melting temperature range and at least one thermo-formable fiber having a second melting temperature range which is lower than the first melting temperature range to such an extent that the structural fiber does not melt in the second melting temperature range of the thermo-formable fiber, wherein the hybrid fabric comprises:
(1) a first network comprising the structural fibers,
(2) a second network consisting of the thermo-formable fibers, and
(3) a plurality of openings between the fibers of the first and second network, wherein the structural and thermo-formable fibers of respectively the first and second network interpenetrate one another and are connected to each other over at least part of the first and second network at a plurality of subsequent loops,
wherein the hybrid fabric has a density of between 0.5 and 0.8 g/cm 3 after thermoforming at a temperature of between 60-65° C., and
wherein the at least one thermo-formable fiber is a non-relaxed monofilament fiber of partially cross-linked poly-ε-caprolactone being moldable at temperatures up to 40-45° C.
2. The immobilisation device as claimed in claim 1 , wherein the at least one thermo-formable fiber has a residual elongation at stretching of between 30 and 120 mm.
3. The immobilisation device as claimed in claim 1 , wherein the at least one thermo-formable fiber has a diameter of between 80 and 175 μm.
4. The immobilisation device as claimed in claim 1 , wherein the at least one thermo-formable fiber is an oriented poly-ε-caprolactone fiber.
5. The immobilisation device as claimed in claim 4 , wherein the poly-ε-caprolactone fiber shows a shrinkage of between 50-80% after having been heated to 65° C.
6. The immobilisation device as claimed in claim 4 , wherein the poly-ε-caprolactone fiber has a melt memory of between 45 and 98%.
7. The immobilisation device as claimed in claim 1 , wherein the fabric has a thickness of between 0.5 and 2 mm, after thermoforming at a temperature of between 60 and 65° C.
8. The immobilisation device as claimed in claim 1 , wherein the degree of shrinking of the fabric at a temperature of between 60-65° C. is between 0 and 30%, in longitudinal and transversal direction.
9. The immobilisation device as claimed in claim 1 , wherein the hybrid fabric contains between 60 and 98% by weight of the at least one thermo-formable fiber and between 40 and 2% by weight of structural fibers.
10. The immobilisation device as claimed in claim 1 , wherein the hybrid fabric has a bending modulus of between 70 and 320 MPa at room temperature after thermoforming at a temperature of between 60-65° C.
11. The immobilisation device according to claim 1 , wherein a first layer of the hybrid fabric is fastened on top of a second layer of a thermo-formable polymer sheet material.