Alginate-containing wound dressing, method and apparatus for making the same

• US 8,967,218 B2
• Filed: 03/11/2013
• Issued: 03/03/2015
• Est. Priority Date: 07/28/2009
• Status: Active Grant

• Current Assignee: Taiwan Textile Research Institute
• Original Assignee: Taiwan Textile Research Institute
• Inventors: Lee, Jui-Sheng, Yang, Chan-Yi
• Primary Examiner(s): Pallay, Michael B
• Application Number:
  US13/792,463
• Publication Number:
  US 20130186555A1
• Time in Patent Office: 722 Days
• Field of Search: None
• US Class Current: 156/425
• CPC Class Codes: A61F 13/00995 for mechanical treatments
• CPC Class Codes: A61F 13/01012 being made of natural material, e.g. cellulose-, protein-, collagen-based
• CPC Class Codes: A61F 13/01029 made of multiple layers
• CPC Class Codes: A61F 13/01038 Flexibility, stretchability or elasticity
• CPC Class Codes: A61F 2013/00229 with alginate
• CPC Class Codes: A61F 2013/00238 characterised by way of knitting or weaving
• CPC Class Codes: A61F 2013/00544 form or structure
• CPC Class Codes: A61P 17/02 for treating wounds, ulcers, burns, scars, keloids, or the like
• CPC Class Codes: B29C 2053/8025 tensioning
• CPC Class Codes: B29C 53/66 with axially movable winding feed member , e.g. lathe type winding
• CPC Class Codes: B29C 53/8016 Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners
• CPC Class Codes: Y10T 156/1007 Running or continuous length work
• CPC Class Codes: Y10T 442/184 Nonwoven scrim
• CPC Class Codes: Y10T 442/198 Coated or impregnated

Abstract

Disclosed herein is a method for manufacturing a wound dressing. The method includes the steps of: forming a alginate fiber by a wet spinning process; winding the alginate fiber around a board to form a plurality of first fibers on a surface of the board; spraying an aqueous solution containing sodium ions on the surface of the wound first fiber; rewinding the alginate fiber around the board to form a plurality of second fibers stacked on the first fibers, in which the second fibers are not parallel with the first fibers; and drying the first fibers and the second fibers.

Claims

1. A method for manufacturing a wound dressing, comprising:

forming at least one alginate fiber by a wet spinning process;

winding the alginate fiber around a board thereby forming a plurality of first fibers on a surface of the board, wherein the first fibers extend in parallel along a first direction;

spraying an aqueous solution containing sodium ions on the surface of the wound first alginate fibers;

rewinding the alginate fiber around the board thereby forming a plurality of second fibers that are stacked on the first fibers, wherein the second fibers extend in parallel along a second direction that is not parallel to the first direction so that an included angle between the first direction and the second direction is in a range between about 0°

to 180°

; and

drying the first fibers and the second fibers so that the first fibers and the second fibers are respectively bound with one another.

2. The method of claim 1, wherein the aqueous solution containing sodium ions comprises sodium chloride in an amount of about 1% to about 15%.

3. The method of claim 1, wherein the alginate is any of a calcium alginate, a barium alginate, a copper alginate, a zinc alginate, a silver alginate or an iron alginate.

4. The method of claim 1, further comprising:

rotating the board with an angle that is equal to the included angle, before the rewinding step.

5. The method of claim 1, further comprising:

drafting the alginate fibers by at least one drafting roller to adjust the breaking strength of the alginate fibers, after the wet spinning process.