Method of continuously dyeing nonwoven fabrics and the products thereof
AssigneePolymer Group, Inc.
InventorsHerbert Hartgrove, Sergio Diaz De Leon
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Abstract
It is the objective of the present invention to disclose a method of continuously dyeing durable nonwoven fabrics, and more specifically, nonwoven fabrics comprising a cellulosic fibrous material dyed with indigo dyestuffs. It is in accordance with the present invention, to utilize synthetic fibers in combination with natural or cellulosic fibers in the formation of a nonwoven web. The natural fibers, preferably cotton, make up at least 10% of the fibrous nonwoven fabric.
Claims8
A process of continuously dyeing a nonwoven fabric, comprising the steps of:
- a. providing a nonwoven fabric comprising staple length fibers, the staple length fibers including at least 10% natural fiber;
- b. wetting said nonwoven fabric;
- c. dyeing said wetted nonwoven fabric with a leuco vat dye;
- d. skying said dyed nonwoven fabric;
- e. rinsing said dyed nonwoven fabric;
- f. drying said nonwoven fabric;
- g. said indigo dyed nonwoven fabric having a crock fastness of at least 5 and a wash durability of 25 home launderings.
An indigo dyed nonwoven fabric comprised of a fibrous blend of staple length fibers, wherein said fibrous blend comprises at least 10% natural fiber, said indigo dyed nonwoven fabric having a crock fastness of at least 5 and a wash durability of 25 home launderings.
A process of continuously dyeing a nonwoven fabric, comprising the steps of:
- a. providing a fibrous blend comprising staple length fibers, the staple length fibers including at least 10% natural fibers, to form a fibrous batt;
- b. carding said fibrous blend;
- c. forming said fibrous blend into a fibrous batt;
- d. bonding said fibrous web to form a nonwoven fabric;
- e. wetting said nonwoven fabric;
- f. dyeing said wetted nonwoven fabric with a leuco state vat dye;
- g. skying said dyed nonwoven fabric;
- h. rinsing said dyed nonwoven fabric;
- i. drying said nonwoven fabric;
- and
- j. said indigo dyed nonwoven fabric having a crock fastness of at least 5 and a wash durability of 25 home launderings.
Dependencies are inferred from the claim text.