Carpet yarns and carpets with improved balance of newness retention and bulk
AssigneeE. I. Du Pont de Nemours and Company
InventorsWae-Hai Tung, Frank Werny
Life of this patent
Estimating the term…
Abstract
Bulked continuous filament carpet yarns having high levels of bulk are disclosed. When ply-twisted together at unusually high twist levels and tufted into carpets, such yarns produce cut-pile carpets having a superior balance of carpet bulk and newness retention when compared to carpets of identical construction made with yarns having conventional levels of yarn bulk and/or twist.
Claims12
Ply-twisted yarns comprised of two to four bulked continuous filament nylon ply yarns each having a denier per filament of 10-25 and a trilobal filament cross-section of modification ratio between 1.4 and 4.0 wherein the relationship between bulk level and modification ratio for each of the plies corresponds to a point on or above line B on FIG. 1 and wherein the relationship between twist level and modification ratio corresponds to a point on or above line E shown on FIG. 2.
Ply-twisted yarns of claim 5 wherein the relationship between bulk level and modification ratio for each of the plies corresponds to a point on or above line C on FIG. 1.
Cut-pile nylon carpets having a pile weight of at least 20 ounces per square yard (0.68 kg/m.sup.2) and a pile height of at least 7/16 inch (1.11 cm), the pile being tufted from ply-twisted yarns comprised of two to four bulked continuous filament nylon ply yarns each having a denier per filament of 10-25 and a trilobal filament cross-section of modification ratio between 1.4 and 4.0 wherein the relationship between bulk level and modification ratio for each of the plies corresponds to a point on or above line B on FIG. 1 and wherein the relationship between twist level and modification ratio corresponds to a point above line E shown on FIG. 2.
Dependencies are inferred from the claim text.