Creative Freedom and Function -
Bag in Cosmetic Bottle
DuPont™ Surlyn® is lending its creative freedom to the production of cosmetic bottles and tubes, building on proven benefits in perfume caps and closures. The compatibility of Surlyn® with many of today's cosmetic products opens up new design potential in their packaging. Surlyn® offers the transparency of glass, without the weight and fragility, It can also be frosted, faceted or finished to obtain special effects, or easily colored to create elegant translucency.
The ‘bag in the bottle’ is an innovative and intelligent packaging concept for cosmetics and pharmacy products, developed by the German company Gaplast GmbH and using DuPont packaging resins. The outer-bottle, made from a stiff thermoplastic, such as PET, encloses a flexible bag of DuPont™ Surlyn®.
An innovative packaging concept, particularly suited for sensitive cosmetic products such as natural cosmetics or active formulas, consists of a flexible bag of Surlyn® attached inside a stiff thermoplastic bottle for dispensing the product. During product dispensing, the inner bag of Surlyn® contracts and separates evenly from exterior bottle wall, creating an air gap and reducing air contact with the sensitive inner bag content. Patented by the German company, Gaplast, the bottle can be designed to convey the brand image and maintain its shape despite the contraction of the inner bag.
A further development from DuPont offering designers greater creative potential, and opening further market opportunities for producers of luxury packaging, is the company's Thick-Wall-Bottle technology: a functional inner layer compatible with the contents is combined with a thick-walled outer layer which optimizes properties such as safety-in-use and appearance. Suitable candidates for the barrier layer include various grades of Surlyn® and combinations with other materials, such as polypropylene, polyethylene, and ethyl vinyl alcohol (EVOH). This technology allows a packaging designer to combine transparency with translucency, opacity and different colored layers, as well as frosted surfaces.