Variables in Press Drying Pulps from Sweetgum and Red Oak.
Abstract
Press drying, a method to increase the utility of high-yield hardwood pulp for linerboard, overcomes fiber bonding deficiencies of conventional papermaking by controlling springback. During drying, press drying incorporated benefits both in plane restraint and thickness restraint. With the exception of tearing resistance, high-yield sweetgum handsheets performed as well or better than press-dried handsheets from high-yield douglas-fir; they were far superior to low-yield conventionally dried handsheets for burst, ring crush, tensile strength, and modulus of elasticity. Moisture sensitivity of adhesive, between liner and corrugating medium, was a critical factor influencing behavior. Handsheets from blends with softwood fibers exhibited properties directly dependent on blend ratio. Little benefit was gained over pulp blending by combining hardwood and softwood pulp as laminations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADA048313
Entities
People
- Roy E. Benson
- Vance C. Setterholm
Organizations
- Forest Products Laboratory