Cellulosic fibers having enhanced reversible thermal properties and methods of forming thereof

• US 10,208,403 B2
• Filed: 10/27/2015
• Issued: 02/19/2019
• Est. Priority Date: 09/21/2001
• Status: Expired due to Fees

• Current Assignee: Outlast Technologies GmbH
• Original Assignee: Outlast Technologies, Incorporated
• Inventors: Hartmann, Mark, Worley, James Brice, North, Matthew
• Primary Examiner(s): Salvatore, Lynda
• Application Number:
  US14/923,898
• Publication Number:
  US 20160272863A1
• Time in Patent Office: 1,211 Days
• Field of Search: 428364, 428393, 4284022, 428913, 442361
• CPC Class Codes: C09K 5/063 Materials absorbing or liberating heat during crystallisation; Heat storage materials
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 1/103 Agents inhibiting growth of microorganisms
• CPC Class Codes: D01F 2/00 Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
• CPC Class Codes: D01F 2/06 from viscose
• CPC Class Codes: D01F 2/08 Composition of the spinning solution or the bath
• CPC Class Codes: D01F 2/28 from organic cellulose esters or ethers, e.g. cellulose acetate
• CPC Class Codes: D04H 1/4258 Regenerated cellulose series
• CPC Class Codes: D04H 1/492 by fluid jet D04H1/49 takes precedence
• CPC Class Codes: D04H 1/732 by fluid current, e.g. air-lay
• CPC Class Codes: D10B 2401/13 anti-allergenic or anti-bacterial
• CPC Class Codes: D10B 2501/00 Wearing apparel
• CPC Class Codes: D10B 2509/026 Absorbent pads; Tampons; Laundry; Towels
• 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 428/298 Physical dimension

Abstract

A viscose fiber comprises a fiber body including a regenerated cellulosic material and a plurality of microcapsules dispersed in the regenerated cellulosic material. The regenerated cellulosic material is derived from an organic plant material and the plurality of microcapsules containing a phase change material has a transition temperature in the range of 0° C. to 100° C., the phase change material providing thermal regulation based on at least one of absorption and release of latent heat at the transition temperature.

Claims

1. A cellulosic article comprising:

a cellulosic matrix, the matrix including at least one organic compound and

a nanoscale containment structure;

wherein the nanoscale containment structure surrounds the at least one organic compound,

wherein the at least one organic compound is present in an amount of more than 10% by weight, based on the weight of the cellulosic matrix,

wherein the at least organic compound has a melting point of less than 100°

C. and is selected from the group consisting of hydrocarbons, waxes, oils, fatty acids, fatty acid esters, stearic anhydrides and alcohols, and

wherein the article has a latent heat of greater than 20 J/g in a temperature range from 15 to 45°

C.

2. The cellulosic article of claim 1, wherein the organic compound includes a paraffinic hydrocarbon having 16 to 22 carbon atoms.

3. The cellulosic article of claim 1, wherein the organic compound includes a polyhydric alcohol.

4. The cellulosic article of claim 1, wherein the organic compound includes one of a polymeric phase change material, a polyethylene glycol, a polyethylene oxide, a polytetramethylene glycol, and a polyester.

5. A cellulosic article comprising:

a cellulosic matrix, the matrix including at least one organic compound;

at least one of,

a nanoscale containment structure; and

an elongated member,

wherein the nanoscale containment structure surrounds the at least one organic compound,

wherein the at least one organic compound is present in an amount of more than 10% by weight, based on the weight of the cellulosic matrix,

wherein the at least organic compound has a melting point of less than 100°

C. and is selected from the group consisting of hydrocarbons, waxes, oils, fatty acids, fatty acid esters, stearic anhydrides and alcohols, and

wherein the article has a latent heat of greater than 20 J/g in a temperature range from 15 to 45°

C.

6. The cellulosic article of claim 5, wherein the latent heat of the article is in the range of 60 J/g to 400 J/g.

7. The cellulosic article of claim 5, wherein the organic compound has a transition temperature in the range of 0°

C. to 50°

C.

8. The cellulosic article of claim 5, wherein the organic material includes a paraffinic hydrocarbon.

9. The cellulosic article of claim 5, wherein the organic compound includes a polyhydric alcohol.

10. The cellulosic article of claim 5, wherein the organic compound includes one of a polyethylene glycol, a polyethylene oxide, a polytetramethylene glycol, and a polyester.