Accession Number:

ADA048313

Title:

Variables in Press Drying Pulps from Sweetgum and Red Oak.

Descriptive Note:

Forest Service research paper,

Corporate Author:

FOREST PRODUCTS LAB MADISON WIS

Personal Author(s):

• Setterholm,Vance C.
• Benson,Roy E.

Report Date:

1977-01-01

Pagination or Media Count:

20.0

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.

Descriptors:

• *DRYING APPARATUS
• *WOOD PULP
• HYDROGEN BONDS
• TENSILE PROPERTIES
• MOISTURE CONTENT
• MIXTURES
• BUCKLING
• PRESSURE
• BONDING
• CRUSHING
• LIGNIN
• CARDBOARD BOXES
• CORRUGATING
• PAPERBOARD

Subject Categories:

• Wood, Paper and Related Forestry Products
• Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE