Multi-component fibers having enhanced reversible thermal properties

• US 7,666,502 B2
• Filed: 11/22/2006
• Issued: 02/23/2010
• Est. Priority Date: 09/21/2000
• Status: Expired due to Fees

• Current Assignee: Hills Limited (Hills Steadfast Investments Limited), Outlast Technologies GmbH
• Original Assignee: Outlast Technologies, Incorporated
• Inventors: Hartmann, Mark H., Haggard, Jeffrey S., Magill, Monte C.
• Primary Examiner(s): Chriss; Jennifer A
• Application Number:
  US11/562,718
• Publication Number:
  US 20070165990A1
• Time in Patent Office: 1,189 Days
• Field of Search: 165/53, 165/10, 165/104.17, 252/70, 252/67, 264/141, 264/4.32, 264/157, 264/211, 264/331.13, 264/331.17, 264/4.33, 264/4.4, 399/328, 428/218, 428/221, 428/370, 428/373, 428/398, 428/402.2, 428/102, 428/11, 428/26, 428/304.4, 428/305.5, 428/313.5, 428/321.5, 428/372, 428/374, 428/376, 428/4, 428/402, 428/402.21, 428/402.24, 428/403, 428/407, 428/906.6, 428/913, 442/131, 442/246, 442/247, 442/74, 442/75, 442/85, 521/67, 521/71, 521/72, 523/207, 523/210, 523/223, 524/156, 524/166, 524/167, 524/236, 524/238, 524/395, 524/474, 524/475, 524/489, 524/490, 524/493
• US Class Current: 428/373
• 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. ,

wherein the temperature regulating material has a partial affinity or partial compatibility with the at least one of the plurality of elongate members,

wherein the temperature regulating material forms at least one discrete domain within the at least one of the plurality of elongated members,

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.

14. The multi-component fiber of claim 1, wherein the temperature regulating material is substantially uniformly distributed within the at least one of the plurality of elongated members.

15. The multi-component fiber of claim 1, wherein the temperature regulating material is randomly distributed within the at least one of the plurality of elongated members.

16. The multi-component fiber of claim 1, wherein the temperature regulating material is distributed in a non-uniform manner within the at least one of the plurality of elongated members.

2. A multi-component fiber, comprising:

a core member, the core member comprising

a first 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 first phase change material having a partial affinity or partial compatibility with the core member,

wherein the first phase change material forms at least one discrete domain within the core member;

a second phase change material; 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 first phase change material is at least 50 J/g.

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

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

C. to 40°

C.

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

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

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

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

10. The multi-component fiber of claim 2, wherein the first phase change material and the second phase change material are different.

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

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

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