MULTI-COMPONENT FIBERS HAVING ENHANCED REVERSIBLE THERMAL PROPERTIES AND METHODS OF MANUFACTURING THEREOF

• US 20070165990A1
• Filed: 11/22/2006
• Published: 07/19/2007
• Est. Priority Date: 09/21/2000
• Status: Active Grant

• Current Assignee: Hills Limited (Hills Steadfast Investments Limited), Outlast Technologies GmbH
• Original Assignee: Hills Limited (Hills Steadfast Investments Limited), Outlast Technologies, Incorporated
• Inventors: Hartmann, Mark, Magill, Monte, Haggard, Jeffrey
• Granted Patent: US 7,666,502 B2
• Time in Patent Office: Days
• US Class Current: 385/103
• CPC Class Codes: D01D 5/24 with a hollow structure; Spinnerette packs therefor D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 8/04 from synthetic polymers
• CPC Class Codes: D04H 1/42 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
• CPC Class Codes: D04H 3/16 with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
• CPC Class Codes: F28D 20/02 using latent heat
• CPC Class Codes: F28D 20/023 the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
• CPC Class Codes: H05K 1/0366 reinforced, e.g. by fibres, fabrics H05K1/036 takes precedence
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2924 Composite
• CPC Class Codes: Y10T 428/2927 including structurally defined particulate matter
• CPC Class Codes: Y10T 428/2929 Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
• CPC Class Codes: Y10T 428/2931 Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core
• CPC Class Codes: Y10T 442/2008 Fabric composed of a fiber or strand which is of specific structural definition
• CPC Class Codes: Y10T 442/30 Woven fabric [i.e., woven strand or strip material]

Abstract

Multi-component fibers having enhanced reversible thermal properties and methods of manufacturing thereof are described. In one embodiment, a multi-component fiber includes a fiber body formed from a set of elongated members, and at least one of the set of elongated members includes a temperature regulating material having a latent heat of at least 40 J/g and a transition temperature in the range of 22° C. to 40° C. The temperature regulating material provides thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. The multi-component fiber can be formed via a melt spinning process or a solution spinning process and can be used or incorporated in various products where a thermal regulating property is desired. For example, the multi-component fiber can be used in textiles, apparel, footwear, medical products, containers and packagings, buildings, appliances, and other products.

Claims

1. A multi-component fiber, comprising:

a fiber body formed from a plurality of elongated members, at least one of the plurality of elongated members comprising a temperature regulating material having a latent heat of at least 40 J/g and a transition temperature in the range of 22°

C. to 40°

C., the temperature regulating material providing thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature,

wherein the plurality of elongated members are arranged in one of an island-in-sea configuration, a segmented-pie configuration, a core-sheath configuration, a side-by-side configuration, and a striped configuration.

2. A multi-component fiber, comprising:

a core member comprising a phase change material having a latent heat of at least 40 J/g and a transition temperature in the range of 10°

C. to 50°

C., the phase change material providing thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature; and

a sheath member surrounding the core member and forming an exterior of the multi-component fiber.

3. The multi-component fiber of claim 2, wherein the latent heat of the phase change material is at least 50 J/g.

4. The multi-component fiber of claim 2, wherein the latent heat of the phase change material is at least 60 J/g.

5. The multi-component fiber of claim 2, wherein the transition temperature of the phase change material is in the range of 22°

C. to 40°

C.

6. The multi-component fiber of claim 2, wherein the core member further comprises a containment structure that contains the phase change material.

7. The multi-component fiber of claim 2, wherein the phase change material provides thermal regulation based on at least one of melting and crystallization of the phase change material at the transition temperature.

8. The multi-component fiber of claim 2, wherein the core member is concentrically positioned within the sheath member.

9. The multi-component fiber of claim 2, wherein the core member is eccentrically positioned within the sheath member.

10. The multi-component fiber of claim 2, wherein the core member comprises from 10 percent to 30 percent by weight of the phase change material.

11. The multi-component fiber of claim 2, wherein the phase change material is a first phase change material, and the sheath member comprises a second phase change material having a latent heat of at least 40 J/g and a transition temperature in the range of 10°

C. to 50°

C.

12. The multi-component fiber of claim 11, wherein the first phase change material and the second phase change material are different.

13. The multi-component fiber of claim 2, wherein the multi-component fiber has a latent heat of at least 2 J/g.

14. The multi-component fiber of claim 2, wherein the multi-component fiber has a latent heat of at least 5 J/g.

15. The multi-component fiber of claim 2, wherein the multi-component fiber has a latent heat of at least 8 J/g.