Canadian Plastics

Insert-molded edge bead sticks to vinyl lip

To ease the discomfort of dental patients having x-rays, the Dental Products Business of Eastman Kodak has developed a soft, delicate edge bead to cushion its intraoral x-ray products.Using Apex 3208-...

October 1, 2003   Canadian Plastics



To ease the discomfort of dental patients having x-rays, the Dental Products Business of Eastman Kodak has developed a soft, delicate edge bead to cushion its intraoral x-ray products.

Using Apex 3208-80-NT flexible vinyl compound from Teknor Apex, Kodak insert molds the bead around the perimeter of the film packet.

The new SureSoft film packets are die-cut from a multi-layer sheet with vinyl outer layers. A tiny border of vinyl extends beyond the seal to serve as an adhesion site for the cushioning bead.

Kodak uses a robot to place the packets into a multi-cavity insert mold, then injection molds the Apex vinyl. One challenge met by the product development team was to find a vinyl molding compound that would form a strong bond with the vinyl film.

The vinyl bead has a diameter of 1.1 mm, and a shot weight of 0.27 g. “It was rather like molding angel hair pasta around the perimeter of the film packet,” says Michael McGovern, Kodak’s R&D technical associate.

Teknor Apex 401-725-8000


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