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| Updated specification for the lamination of composite materials  The American Architectural Manufacturers Association (AAMA) has updated and released AAMA 312, "Voluntary Specification for the Lamination of Wood and Cellulosic Composite Materials Intended for Use on AAMA Certified Profiles." Last updated in 2005, the document establishes the minimum performance requirements for the lamination of wood and cellulosic composite materials (WCCM) intended for application on either the interior or exterior surfaces of AAMA certified profiles. It also provides common test methods for determining the acceptable level of adhesion after exposure to cyclic weatherability conditions, both interior and exterior applications."This document provides guidelines and important criteria for AAMA members involved with the lamination of wood and cellulosic composite materials to AAMA certified profiles," says Jack Reed, chair of the WCCM Council 312 Review Task Group. "This revised document identifies the common test methods used to determine acceptable performance of the laminates, with respect to adhesion, weathering and appearance. Important changes to the previous specification include a change to the title to indicate performance of laminate is in combination with an AAMA certified profile." In this most recent version, a section about cyclic aging was added. Other important changes include a new protocol for certification to formaldehyde emissions, additional details to the accelerated exposure options and updates regarding chemical resistance. New sections also were added to cover test procedures for interior and exterior laminate adhesion and to address lead content. write your comments about the article :: © 2014 Construction News :: home page |