World Library  
Flag as Inappropriate
Email this Article

Oriented structural straw board

Article Id: WHEBN0048230267
Reproduction Date:

Title: Oriented structural straw board  
Author: World Heritage Encyclopedia
Language: English
Subject: Wood products, Firelog, Plank (wood), Wood flour, Cellulosic ethanol
Collection: Composite Materials
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Oriented structural straw board

OSSB is identifiable by its characteristic golden colored straw strands

Oriented structural straw board (OSSB) is an engineered board that is made by splitting straw and formed by adding formaldehyde-free adhesives and then hot compressing layers of straw in specific orientations. Research and development for OSSB panels began in the mid 1980s and was spearheaded by The Alberta Research Council, Canada (today AITF)[1] who identified the straw strand manufacturing technology using formaldehyde-free (p-MDI) adhesives.

Contents

  • Uses 1
  • Manufacturing 2
  • Production 3
  • Properties 4
  • Types 5
  • References 6

Uses

OSSB used as furniture and interior decoration

OSSB can replace wood oriented strand board (OSB) and particle board in structural and non-structural applications, such as interior and exterior walls for house construction, furniture and interior decoration.[2] [3] OSSB panels are formaldehyde-free, they are also used for applications where air quality is a concern, such as kindergartens, hospitals, bedrooms, and hotels.

Manufacturing

Wheat Stalk
OSSB Production facility in Yangling, China

OSSB panel manufacturing starts with careful selection of straw fibres, which are then cut, cleaned, split and dried. Formaldehyde free resin is added to the straw and the fibres are oriented for strength and appearance, and shaped into a mat through directional mat forming. The mat is then pressed between heated belts, water is vaporized, transferring heat into the straw. The heat cures the adhesive and causes a series of physical and chemical changes to the pressurized raw materials, which harden the final product.

Production

The only legal producer of OSSB on a commercial scale is Novofibre Panel Board Holding China, Ltd., located in Yangling, Shaanxi province in China. Currently, their factory has a 60,000 cubic metre yearly capacity.

Properties

OSSB panels have high structural strength, load bearing and stability in both directions, as well as superior workability and excellent nail holding properties on all sides. Water permeability treated OSSB panels are more water resistant than treated traditional wood panel boards because they have no internal gaps or voids. OSSB panels are also highly earthquake resistant.[4] The resin used to manufacture OSSB is p-MDI, which does not emit

  1. ^ "Oriented split Straw Board - A New Era in Building Products". Builddwelllibrary.org. Retrieved 2015-10-25. 
  2. ^ "Performance of Zinc Borate-Treated Oriented Structural Straw Board against Mold Fungi, Decay Fungi, and Termites - A Preliminary Trial" (PDF). Ncsu.edu. Retrieved 2015-10-25. 
  3. ^ "Utilization of Wheat Straw as a Building Material——Oriented Structural Straw Board in a Housing System-《China Wood Industry》2010年03期". En.cnki.com.cn. Retrieved 2015-10-25. 
  4. ^ "ARC Celebrates OSSB “Wheatboard” in China". Albertatechfutures.ca. 2009-10-29. Retrieved 2015-10-25. 
  5. ^ "MDI – a simple equation for OSB production? - Wood Based Panels". Wbpionline.com. Retrieved 2015-10-25. 
  6. ^ "Performance Of Zinc Borate-Treated Oriented Structural Straw Board Against Mold Fungi, Decay Fungi, And Termites – A Preliminary Trial | Han | Bioresources". Ojs.cnr.ncsu.edu. Retrieved 2015-10-25. 

References

  1. OSSB1 - General purpose boards for construction and interior decoration.
  2. OSSB 3 - Load-bearing boards for use in construction with high strength stability needs.
  3. OSSB DECO–multipurpose boards with a unique elegant texture, which is especially suitable for decoration.
  4. OSSB panels can be produced in a range of finished products for acoustic, floor or home applications keeping the natural straw surface appearance.

OSSB boards are available in thicknesses varying from 3 – 30mm in different densities. Novofibre Panel Board Holding China, Ltd., manufactures 3 standard products:

Types

[6] compounds, which are toxic to termites, beetles, molds, and fungi, but not to mammals in applied doses.borate The raw material can be treated by various [5]

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.