Rewettable polyolefin fiber and corresponding nonwovens
AssigneeHercules Incorporated
InventorA. Chandler Schmalz
Life of this patent
Estimating the term…
Abstract
A method for imparting and retaining hydrophilicity and liquid strike-through properties within an essentially hydrophobic polyolefin-containing nonwoven material and the corresponding fiber, fibrillated film, and nonwoven product thereof, whereby essentially hydrophobic polyolefin-containing fiber or film is topically treated with an effective amount of one or more of a water soluble polyalkoxylated polydimethylsiloxane, an alkoxylated ricinolein with certain fatty acids, or corresponding hydrogenated derivatives thereof.
Claims17
A nonwoven material formed from one or more webs of polyolefin fiber, fibrillated film or combination thereof, having applied thereon an effective amount of a modifier composition comprising at least one of
- (a) a component containing alkoxylated ricinolein with up to about 15%, by weight of modifier composition, of an 18 carbon fatty acid;
- (b) a corresponding hydrogenated derivative of component (a);
- and
- (c) a polyalkoxylated polydimethylsiloxane having up to about 80% by weight of modifier composition, of component (a), (b) or combination thereof.
A polyolefin-containing fiber or fibrillated film having coated thereon an effective amount of a modifier composition comprising at least one of
- (a) a component containing alkoxylated ricinolein with up to about 15%, by weight of modifier composition, of an 18 carbon fatty acid;
- (b) a corresponding hydrogenated derivative of component (a);
- and
- (c) a polyalkoxylated polydimethylsiloxane;
- having up to about 80% by weight of modifier composition, of one or more of component (a), (b), or combination thereof.
A fiber or film of claim 17 wherein the modifier composition comprises at least one compound represented by the formula ##STR4## combined with up to about 15%, by weight of modifier composition, of at least one fatty acid selected from the group consisting of oleic, linoleic, stearic and palmitic acid;
- and/or ##STR5## combined with up to about 15% by weight of modifier composition, of a saturated 18 carbon fatty acid;
- wherein R is individually defined as an acyl derivative of ricinoleic acid;
- ##STR6## Alk is a methylene chain of 2-4 carbon atoms;
- and n and m are individually defined as a positive number of about 1-10.
The fiber or film of claim 17, wherein the modifier composition comprises ethoxylated polydimethylsiloxane in combination with about 0.5%-80%, by weight of modifier composition, of ethoxylated castor oil with an active amount of an antistat agent.
The fiber or film of claim 17, wherein about 0.5% to 2% modifier composition, by weight, is topically applied onto the sheath component of polyolefin sheath/core bicomponent fiber.
A nonwoven material formed from one or more webs of polyolefin-containing fiber, fibrillated film, or combination thereof, having applied thereon an effective amount of a modifier composition comprising at least one of
- (a) a component containing alkoxylated ricinolein with up to about 15%, by weight of modifier composition, of an 18 carbon fatty acid;
- (b) a corresponding hydrogenated derivative of component (a);
- and
- (c) a polyalkoxylated polydimethylsiloxane in combination with about 0.5%-80% by weight of component (a), (b) or combination thereof.
A polyolefin-containing fiber or fibrillated film having coated thereon an effective amount of a modifier composition comprising at least one of
- (a) a component containing alkoxylated ricinolein with up to about 15%, by weight of modifier composition, of an 18 carbon fatty acid;
- (b) a corresponding hydrogenated derivative of component (a);
- and
- (c) a polyalkoxylated polydimethylsiloxane in combination with about 0.5%-80%, by weight of component (a), (b) or combination thereof.
Dependencies are inferred from the claim text.