International Paper Company

Ronald J Messenger

Paul C Lucas

Guy D'Anna

Lawrence C Nykwest

Elizabeth Macklem-Nathan

The invention provides a process for producing an improved barrier laminate structure composed of an oxygen barrier silicone coating on a paper or paperboard substrate. The process comprises hydrolyzing a silane formulation with water to form a corresponding silanol. A photoinitiator is added to the silanol to form an ultraviolet sensitive formulation. The formulation is coated onto a paper or paperboard substrate and allowed to dry. Once dryed, the formulation is exposed to ultraviolet radiation to form a cured formulation.

Process for producing an improved oxygen barrier structure on paper

Preformed cellulosic linerboard as utilized in the manufacture of corrugated products is provided with enhanced crush strength by a combined lignin-coating and calendering treatment. The linerboard is coated with an aqueous lignin-containing solution and then, with the coating in a wet or dry state, subjected to at least one pass through a calender nip to substantially increase the CD crush strength of the treated linerboard over the CD crush strength of an untreated linerboard or a lignin treated but uncalendered linerboard. The linerboard may be laminated with a substantially air and moisture impervious sheet to inhibit bleeding of the lignin coating in high humidity conditions.

Growing community of inventors

Matamoras, PA, United States of America

Ronald J Messenger