April 20, 2016 - Flexible Packaging

Cast and Blown Films for Flexible Packaging

The flexible packaging market is on track to be worth $99,621.9 million by 2018, according to Markets and Markets. From food and beverage to personal care and pharmaceutical, this market serves a wide range of applications in today’s society.

Additionally, flexible packaging offers ease of handling, storage, cost savings and convenience. As a result, this market is a key contributor to the packaging world’s continued success and innovation.

How are Flexible Packaging Products Created?

Polymers such as polyethylene, polypropylene and polyester are converted into films that are then used to manufacture pouches, sachets, bags and other flexible packaging products.

Why Films?

Films are flexible materials that offer many desirable characteristics depending on their manufacturing processes and technologies.

Let’s take a closer look at two ways films are manufactured:

Cast Films:

Cast films are manufactured by extruding the melted polymer through a flat die or slot. This process forms a thin film that is then extruded and attached to a chilled roller. While these films can be produced at higher line speeds, there is higher waste associated with production.

Blown Films:

Blown films are created when a jet of air is blown into the melted plastic polymer. This melted plastic forms a tube, which is inflated, flattened by rollers and then cut to length. Blown films provide an efficient way to manufacture film products. Little polymer is needed to produce a lot of film.

Cast and Blown Film Applications:

Cast and blown films have low tensile forces and high elongations. While cast films are considered to stretch more than blown films, both types can be used in flexible packaging depending on the pack design and requirements.

Bostik’s products that are manufactured with cast and blown films include laminating adhesives, heat seal, cold seal and reseal products.

For more information on films for the flexible packaging market, call 800-7-BOSTIK.

Bostik is also on Facebook (Bostik Industrial) and Twitter (Bostik_IND).

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