High spiral angle winding cores.

摘要

The invention provides spirally wound paperboard cores (10) for winding of textiles and other materials and which have enhanced high speed winding capability. The spirally wound paperboard plies (32,34,36,38,40,42; Fig. 2) forming the body wall (12) of the paperboard core (10) have a predetermined spiral winding angle (!5) with respect to the axis (20) of the cylindrical body wall (12) of greater than about 71 degrees. In winding cores having a relatively large ID of between about 4.8 in. (120 mm) and 6 in. (150 mm), the paperboard plies forming the spirally wound cores have a winding angle of greater than about 74 degrees. In winding cores having a lower ID of less than about 4.8 inches (120 mm), all of the paperboard plies have a width of about 3.5 in. (89 mm) or less and a spiral winding angle of greater than about 71 degrees.