E.i. Dupont De Nemours and Company

Ramesh Mohanlal Gohil

Charles Anthony Smith

Albert W Forrest, Jr

Karl Paul Paoletti

Donna Kristine Gardner

Darrel L Schindler

This invention comprises an impact-resisting glazing structure having a support frame and a multilayered composite secured in the frame wherein the composite comprises two sheets of glass spaced apart by an interior spacer positioned along the periphery of the glass sheets with a polyester film adhered to the interior surface of one of the glass sheets. The polyester film has an asymmetric orientation of crystals and molecules in the amorphous regions and having an in-plane distribution of crystalline and amorphous phases in which the (100) planes of said crystals lie in the film plane and wherein in the film, said crystals have chain axes oriented toward the transverse direction such that dominant physical properties are obtained in the transverse direction.

Impact-resisting glazing structure

An improved process for preparing a biaxially stretched thermoplastic film, such as polyethylene naphthalate (PEN) or polyethylene terephthalate (PET) film, having low thermal shrinkages by simultaneous biaxial stretching of the film in a tenter frame using linear electrical motors to drive the tenter clips. The film is relaxed in the machine direction (MD) and the transverse direction (TD) by converging the paths of the tenter clips and decelerating the tenter clips during heat-setting to provide film having tailored levels of MD and TD shrinkages.

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Circleville, OH, United States of America

Ramesh Mohanlal Gohil