Just Cavalli: Glass Polymer™ helps create high tech perfume packaging

G. Candiani of Italy has selected The Glass Polymer™ from Eastman Chemical Company to help produce the bottle for Just Cavalli, a new Roberto Cavalli fragrance. The transparent bottle is made up from different fully integrated parts: a glass core, a resin shoulder and a protective housing made from Eastar® AN014 copolyester.

The new bottle, which was designed by G. Candiani Srl (Tradate – VA) on behalf of I.T.F. (Lodi), combines an apparently minimal design with sophisticated simplicity. At the same time, it contains a high technological content and complexity.

Carlo Candiani, Amministratore Delegato of G. Candiani S.r.l. explains: “When it came to material choice, the customer allowed us total freedom. Key requirement was that we would achieve excellent aesthetical qualities: first of all transparency – together with good mechanical resistance and elasticity. Furthermore it was necessary for the material to be chemically compatible with the perfume itself. Eastman’s Glass Polymer offered all these characteristics.

“The Just Cavalli perfume bottle is a complex object, consisting of three different materials: glass, a special resin used for the bottle shoulder and The Glass Polymer, which is used for the external housing to be snapped onto the other materials.

“The major concern was to identify a suitable material that could perform well with both glass and the other resin. A material with good mechanical properties, but also with good elasticity, as the glass tolerances can be pretty varied, with differences of more than 1,5 mm.”

Because of the required production rate and quantities (40.0000 pieces/week) the Candiani Company decided to run a detailed pre-study. Carlo Candiani: “We produced an 8-cavity mould of approximately 600 x 600 mm with a traditional distribution runner. In order to prevent snap-in assembly problems with glass and the special resin, we first optimised the size through resins stereo-prototyping models. Thankfully our Company has both the technology and the required tools for this in-house. Next, we created a pilot mould with a single cavity. Once start-up production issues had been solved, parts could be produced by injection-moulding.”

Eastman Glass Polymer was developed specifically for the cosmetics and perfume sectors. It is a high flow product that contains a mold release and it offers excellent appearance and clarity, good physical properties, chemical resistance, and easy processing. With US FDA approval, The Glass Polymer may also be used in food contact applications as it complies with the specifications and conditions of use in CFR 177.1240.

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