Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (4.5 MB bytes)

Title: Gluing of Eastern Hardwoods: A Review

Author: Sellers, Terry Jr.; McSween, James R.; Nearn, William T.;

Date: 1988

Source: Gen. Tech. Rep. SO-71. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 30 p.

Publication Series: General Technical Report (GTR)

Description: Over a period of years, inrreasing demand for softwoods in the Eastern United States has led to an increase in the growth of hardwoods on cut-over softwood sites. Unfortunately these hardwood trees are often of a size and shape unsuitable for the production of high-grade lumber and veneer. They do, however, represent a viable, economic soures of raw material for plywood, fiberboard, particleboard, and oriented strandboard (or flakeboards), all products that require the successful use of adhesives in their manufacture. The current status of gluing eastern hardwoods is reviewed in this report, with emphasis on hardwoods growing on southern pine sites. The subjects covered include adhesives, wood and wood-surface properties and their interactions with the adhesive, and the quality of the bonds produced when these hardwoods are used in the manufacture of end joints, laminates, plywood, and other composite panels. A variety of adhesives are available that equal or exceed the strength of the hardwoods being bonded. The choice of a particular adhesive is dictated in large measure by the adhesive price and the end-use criteria for the finished product. In discussing the gluing of eastern hardwoods, the approach taken is that the fundamentals that determine the quality ofan adhesive bond should remain the same whether the substrate is a softwood or a low-, medium-, or high-density hardwood. To illustrate the differences encountered in gluing the various hardwood species and the best approach for dealing with them in terms of bonding fimdamentals, in this report we will concentrate on: ·The quality and character of the surface as affected by wood structure. ·Bond strength, dimensional change, porosity, and compaction of composites as affscted by species' density. ·Ability of the resin to wet the surface and penetrate the fine structure of the cell wall. Gross penetration as affected by wood structure, resin viscosity; and resin flow. ·The interaction between pH of tannins, or other extractives, and the curing mechanism of resins. Adhesives are available to provide the necessary structural integrity for plywoods, particle- boards, flakeboards, and fiberboards with hardwood substrates; however, in many cases the adhesive cost may be considered excessive in terms of current commercial practice. Development opportunities lie in providing a family of adhesives that will provide exterior bonds at a competitive price over the whole range of southern hardwoods, including those at the high end of the density scale.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Sellers, Terry, Jr.; McSween, James R.; Nearn, William T. 1988. Gluing of Eastern Hardwoods: A Review. Gen. Tech. Rep. SO-71. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 30 p.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.