Back to results
US 11,598,028 B2Granted
Method of preparing a crimped fiber
AssigneeAVINTIV Specialty Materials Inc.
InventorsJohn Frederick Steffen, Ralph A. Moody, III
Life of this patent
Estimating the term…
Abstract
Multi-component fibers or filaments that are ribbon shaped are provided having polymer components positioned in a side-by-side fashion. For example, the multi-component fibers may be bicomponent fibers having ribbon shape. The polymer components of the fibers are selected to have differential shrinkage behavior. Nonwovens are also provided that are manufactured from such ribbon shaped multi-component fibers or filaments.
Claims16
A method of preparing a crimped fiber, comprising:
- (i) forming a continuous bicomponent fiber including a first polymer component and a second polymer component in a side-by-side configuration, wherein
- (a) the first component comprises a first polyolefin and the second component comprises a second polyethylene terephthalate;
- (b) the first component comprises a first polyolefin and the second component comprises a second polylactic acid (PLA);
- or
- (c) the first component comprises a first polyethylene terephthalate and the second component comprises a second polylactic acid (PLA);
- wherein the continuous bicomponent fiber has a ribbon-shaped cross-section;
- and
- (ii) activating the continuous bicomponent fiber to initiate self-crimping of the continuous bicomponent fiber and to form the crimped fiber.
5 more elements
A method of forming a spunbond nonwoven, comprising:
- (i) forming a plurality of continuous bicomponent fibers including a first polymer component and a second polymer component in a side-by-side configuration by a spunbond process;
- wherein the plurality of continuous bicomponent fiber has a ribbon-shaped cross-section;
- (ii) activating the plurality of continuous bicomponent fibers to initiate self-crimping of the plurality of continuous bicomponent fibers to provide a plurality of continuous bicomponent crimped fibers prior to a formation of a spunbond web;
- and
- (iii) consolidating the spunbond web of the plurality of continuous bicomponent crimped fibers;
- wherein (a) the first component comprises a first polyolefin and the second component comprises a second polyethylene terephthalate;
- (b) the first component comprises a first polyolefin and the second component comprises a second polylactic acid (PLA);
- or
- (c) the first component comprises a first polyethylene terephthalate and the second component comprises a second polylactic acid (PLA).
6 more elements
Dependencies are inferred from the claim text.