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PET bottle with rigid liner shows promise for multiple applications

New package for the dispensing and delivery of sensitive chemicals offers shatter-resistance, a light weight, and full product evacuation; technology is available for license.

Pw 50846 Bright Pak Group

A next-generation liquid dispensing and delivery system for sensitive chemicals and other products, that comprises a collapsible, rigid liner inside a PET bottle, was profiled at The Packaging Conference, Feb. 4-6, in Atlanta, by its developers, ATMI, Inc. and Packaging Technologies, Inc., represented by ATMI director of marketing Al Botet and PTI vice president Tracy Momany.

ATMI provides specialty semiconductor materials, and materials handling and delivery solutions designed to increase process efficiencies to the worldwide semiconductor, flat panel, and life sciences industries. ATMI worked with PTI to develop the new system, known as BrightPack®, as a value-added alternative to large glass bottles and other traditional systems that store and dispense photolithography chemicals used in the manufacturing of semiconductors, LEDs, and flat panel displays.

The BrightPak system’s primary components are created from two separate preforms. The polyethylene terephthalate (PET) preform is used to blow-mold a bottle with a capacity of 4.6 L. The second preform is made from polyethylene naphthalate (PEN) and is used to create the rigid, three-dimensional collapsible interior “liner” that holds the chemicals. In introducing the innovation, Botet said, “The BrightPak transcends industries.”

As Botet explained, the primary objectives for the interior rigid liner were that it had to collapse at low pressure without tearing, be compatible with various chemicals, and dispense 99% of the product. “Photoresist chemicals can cost thousands of dollars per liter, so we needed to be able to squeeze every drop out,” Botet explained. The bottle around the liner had to withstand six times the dispensing pressure (greater than 90 psi) to provide an additional safety cushion.

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