Volume 38, Issue 8, August 2003


AAMA Looks at Edge Deletion Controversy 

The issue of edge deletion is a concern for some IG manufacturers. The controversial issue of edge deletion was addressed recently in the American Architectural Manufacturers Association’s (AAMA) Glass Materials Council (GMC) first newsletter. According to AAMA, the concern lies in whether reflective and low-E coatings should be ground off around the edges of glass lites before they are made into insulating units. 

“The concern centers on ensuring that the perimeter spacer sealant reliably adheres to the glass and prevents the unsightly black edge corrosion of silver metallic layers of the coating that can occur if the edges are not sealed against the effects of moisture and cleaning solutions,” said the article.

Those opposed to edge deletion cite the potential chemical interaction between sealants and metallic coatings that could corrode glass coatings or cause IG seal failure as reasons for the opposition.

“Others say that technological advances in coatings and compatible sealant technologies have rendered edge deletion unnecessary and the increased risk of scratching the softer low-E coatings does not justify the additional handling required, nor the increased processing time,” said the AAMA article.

However, those in favor of edge deletion say it is necessary since corrosion from low-E’s silver, metallic layers starts at the glass’ edge.

At this time there is no standard for edge deletion, and AAMA’s GMC is questioning whether it can provide any technical assistance. It is considering the formation of a task group to address the matter.

Info www.aamanet.org or call 847/303-5664.

Arch Aluminum Adds Tempering System to Dallas Facility

Arch Aluminum’s Dallas facility has announced the addition of a new forced-convention furnace from its subsidiary HHH Architectural Tempering Systems of Vancouver, Wash. The furnace measures 100 inches by 180 inches.

“The energy codes in the state of Texas required Arch Aluminum to upgrade its furnaces to temper the new generation of low-E products efficiently,” said Leon Silverstein, chief executive officer. “This furnace has achieved and now exceeds our goals for a flat glass tempering furnace.”

Info www.archaluminum.net or call 800-432-8132.

Kyro’s Glaston Technologies Receives Machine Orders
Glaston Technologies, Kyro Group’s glass and stone technology business area, reported that it has received machinery orders for approximately 15 million eur in connection with Vitrum 2003.
According to the company, the ordered machines and equipment will be delivered mainly to Europe, the United States and Asia during the year. The orders include pre-processing, flat tempering and tempering and bending machines for both the architectural and automotive glass industries. 

AGS Produces Large Laminated Glass
Advanced Glazing Systems (AGS) of Richmond, British Columbia, recently produced what it claims to be some of the largest laminated glass ever. Two lites, each 239 by 101 inches, and consisting of two layers of 3/8-inch thick clear annealed glass and a 0.09-inch thick interlayer, were produced for the new Yves St. Laurent store in Beverly Hills.

According to the company, each laminated lite of glass weighed just fewer than 1,900 pounds when completed. Since the size and weight of the glass far exceeded the capacity of the washing machine, the glass had to be cleaned by hand before laminating. After cleaning and surface-prep, the glass was set up on special tables that allowed the resin to be poured between the lites. A few hours later, the resin had cured and the product was ready for delivery.



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