Billy F Beasley

US Patent:

20050051290, Mar 10, 2005

Filed:

Sep 5, 2003

Appl. No.:

10/656416

Inventors:

Billy Beasley - Hartsville SC, US
Anthony Cross - Hartsville SC, US
Robert Schock - Hartsville SC, US
Johannes van de Camp - Hartsville SC, US
Pam Horine - Florence SC, US
Terri Smith - Maple Valley WA, US

International Classification:

D21H017/02

US Classification:

162176000, 162123000, 162127000

Abstract:

The present invention provides a low-density paperboard sheet of at least one paperboard layer made from a stock solution that includes a proportion of standard wood flour or fine sawdust in addition to traditional cellulose fibers. The proportion of sawdust can range from 1% to 40% by weight. Advantageously the sawdust of the present invention does not require a costly refining or micronization operation in order to produce low-density, high yield paperboard layers. Additionally, the low-density layers of the present invention may be readily combined with other layers of varying densities in order to tailor the physical properties of the resulting multi-layer sheet to a given application.