Multi-component fibres

Patent metadata

Field	Value
Publication number	US-9725633-B2
Application number	US-67383910-A
Country	US
Kind code	B2
Filing date	Sep 3, 2007
Priority date	Sep 3, 2007
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A multi-component fiber includes at least two elongated fiber bodies. A first fiber body consists of a first material including a phase change material and a second fiber body consists of a second material and encloses the first fiber body. The phase change material is non-encapsulated or in raw form and the first material includes a viscosity modifier selected from polyolefines having a density in the range of 890-970 kg/m 3 as measured at room temperature according to ISO 1183-2 and a melt flow rate in the range 0.1-60 g/10 minutes as measured at 190° C. with a 21.6 kg weight according to ISO 1133. Further, a textile, a fabric and an absorbent article include the multi-component fiber.

First claim

The invention claimed is:

1. A multi-component melt-spun fibre, comprising:
at least two elongated melt-spun fibre bodies, wherein a first fibre body consists of a first material comprising a phase change material (PCM) in raw form and a second fibre body consists of a second material and encloses the first fibre body,
wherein the first material is a blend comprising the phase change material and a viscosity modifier selected from polyolefines having a density in the range of 890-970 kg/m 3 as measured at room temperature according to ISO 1183-2 and a melt flow rate in the range 0.1-9 g/10 minutes as measured at 190° C. with a 21.6 kg weight according to ISO 1133,
wherein the PCM is present in more than 75% by weight, calculated on the total weight of the first fibre body.

2. The multi-component fibre according to claim 1 , wherein the viscosity modifier has a density greater than 920 kg/m 3 , as measured at room temperature according to ISO 1183-2.

3. The multi-component fibre according to claim 1 , wherein the phase change material has a latent heat of at least 100 J/g.

4. The multi-component fibre according to claim 1 , wherein the multi-component fibre has a thermal efficiency, as measured by the ratio ΔH fibre /(w PCM *ΔH PCM )*100, which is at least 60 expressed in %.

5. The multi-component fibre according to claim 1 , wherein the viscosity modifier is present in less than 25% by weight, calculated on the total weight of the first fibre body.

6. The multi-component fibre according to claim 1 , wherein the first material comprises the phase change material and the viscosity modifier in the amount of at least 90% by weight together, calculated on the total weight of the first material.

7. The multi-component fibre according to claim 1 , wherein the phase change material is selected from hydrocarbon waxes with a melting point in the range 20-50° C.

8. The multi-component fibre according to claim 1 , wherein the phase change material is selected from linear hydrocarbon waxes.

9. The multi-component fibre according to claim 1 , wherein the viscosity modifier is polyethylene.

10. The multi-component fibre according to claim 1 , wherein the viscosity modifier is polyethylene with a density greater than 950 kg/m 3 .

11. The multi-component fibre according to claim 1 , wherein the fibre has a latent heat of at least 20 J/g as measured with a DSC-method in the range 0° C.-50° C.

12. The multi-component fibre according to claim 1 , wherein the fibre has strength greater than 10 cN/tex.

13. The multi-component fibre according to claim 1 , wherein the ratio between the viscosity of the first material and the second material fulfils the condition 0.1<Viscosity 1/Viscosity 2<10, where Viscosity 1 is the complex viscosity at the angular frequency of 10 rad/s of the first material comprising PCM and Viscosity 2 is the complex viscosity at the angular frequency of 10 rad/s of the second material, wherein the viscosities are measured at the extrusion temperature used during melt spinning.

14. The multi-component fibre according to claim 1 , wherein the second material is a fibre forming polymer that does not dissolve in the phase change material at temperatures above the melting point or the softening point of the fiber forming polymer.

15. The multi-component fibre according to claim 1 , wherein the second material comprises polymers selected from polyesters and polyamides.

16. The multi-component fibre according to claim 1 , wherein the fibre comprises at least one or more first fibre bodies and at least one or more second fibre bodies.

17. The multi-component fibre according to claim 1 , wherein the fibre comprises at least one or more first fibre bodies, at least one or more second fibre bodies and at least one or more third fibre bodies which consists of a third material.

18. A textile material comprising the multi-component fibre according to claim 1 .

19. A fabric comprising the multi-component fibre according to claim 1 .

20. The fabric according to claim 19 , wherein the fabric has a latent heat of at least 10 J/g.

21. An absorbent article comprising the multi-component fibre according to claim 1 .

22. The multi-component fibre according to claim 1 , wherein the PCM is present in more than 80% by weight, calculated on the total weight of the first fibre body.

23. The multi-component fibre according to claim 1 , wherein the multi-component fibre comprises a first material having a PCM efficiency, as measured by the ratio ΔH mix /(w PCM *ΔH PcM )*100, of at least 94.1%.

24. A multi-component melt-spun fibre, comprising:
at least two elongated melt-spun fibre bodies, wherein a first fibre body consists of a first material comprising a phase change material (PCM) in raw form and a second fibre body consists of a second material and encloses the first fibre body,
wherein the first material is a blend comprising the phase change material and a viscosity modifier selected from polyolefines having a density in the range of 890-970 kg/m 3 as measured at room temperature according to ISO 1183-2 and a melt flow rate in the range 0.1-9 g/10 minutes as measured at 190° C. with a 21.6 kg weight according to ISO 1133,
wherein the first material has a PCM efficiency, as measured by the ratio ΔH mix /(w PCM *ΔH PcM )*100, of at least 82.9%.

25. The multi-component fibre according to claim 24 , wherein the first material has a PCM efficiency, as measured by the ratio ΔH mix /(w PCM *ΔH PcM )*100, of at least 90%.

Assignees

• Nihlstrand Anna
• Gabrielii Inge
• Hagström Bengt
• Sca Hygiene Prod Ab

Inventors

• Nihlstrand Anna
• Gabrielii Inge
• Hagström Bengt

Classifications

• D01F8/12

  with at least one polyamide as constituent · CPC title

• Y10T428/2929

  Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type] · CPC title

• C09K5/063 Primary

  Materials absorbing or liberating heat during crystallisation; Heat storage materials · CPC title

• Y10T428/249921

  Web or sheet containing structurally defined element or component · CPC title

• D01F8/06

  with at least one polyolefin as constituent · CPC title