Flex Films gets US patent for its BOPET film used for alu-alu blister pack

By 04 Dec 2018

Flex Films, the global film manufacturing arm of Uflex, has been granted the United States Patent covering entire categories of formable films that include one or more BOPET layers used in alu-alu blister packaging. The patent US 10131122 was issued to Flex Films (USA) on 20 November 2018 for a period of 20 years, lending a competitive advantage to the films business of the company over its opponents in cold formed pharmaceutical packaging industry. With the patent issuance, the company gets exclusive right of manufacturing and sale of this special BOPET film in US, Europe and India.

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This patent has a uniqueness of forming characteristic of BOPET film in Z direction during packaging application

This patent has a uniqueness of forming characteristic of BOPET film in Z direction during packaging application.

With this innovation in pharma packaging and particularly for alu-alu blister laminate structure, BOPET film has completely replaced the carcinogenic PVC. When PVC is recycled or reprocessed, it releases poisonous gases like dioxin and hydrochloric acid which are hazardous for human health. Also when PVC comes in direct contact with sunlight, it gives away chlorine gas, whereas the special polyester film can be recycled and reprocessed and is 100% environment-friendly.

Likewise, this BOPET film has also replaced 25 microns BOPA film, the processing of which is difficult due to its intrinsic property of moisture absorption that makes it de-laminate from aluminium foil.

The BOPET film, developed by Uflex’s film business and patented by Flex Films USA, delivers a huge saving on carbon foot prints and energy. Another added advantage that this BOPET films has over PVC and BOPA is that they can be easily printed with many different types of inks. Even today, it is difficult to read the details of drugs printed on aluminium foil of blister packs, but with the compatibility feature of BOPET film with the different types of inks used in printing, communication of drugs on blister packs has become readable now. Our BOPET film has even opened up many avenues to evade the menace of anti-counterfeiting.

Pramod Sirsamkar, president, technical & new product development (films), Uflex, who along with the R&D team invented the film stated, “We are pleased to strengthen our intellectual property protection with the addition of this patent. Our R&D team had consistently worked to invent our now patented special polyester film that since its launch last year has changed the landscape of medical packaging reducing the dependency on BOPA and PVC films use in alu-alu laminate blister pack. This patent undoubtedly would be a game changer for our business and will prove to be an asset not only for us but also for the pharmaceutical industry.”

Anantshree Chaturvedi, vice-chairman and CEO, Flex Films International, said, “We have believed that healthy competition always benefits customers the most. The patent awarded to us gives us the right to protect our innovation and stop others from copying, reverse-engineering or selling our product without our permission, thereby reducing our risks and ensuring best product delivered to our customers. This silver bullet now gives us protection for a pre-determined period, allowing us to keep competitors at bay and lead the path as always.”


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