The role of Zotefoams’ Plastazote polyethylene foam in PPE and ventilators

Materials technology specialist Zotefoams, believes Plastazote, a family of polyethylene foams from the Azote range could help with the coronavirus pandemic.

Plastazote is latex-free, non-toxic and hypoallergenic. It is also reportedly the most-cited thermoplastic foam in medical literature for skin contact suitability, with medical grades tested to ISO10993. Currently there has been an increase in usage as a result of an surge in demand for the applications it is involved in, such as Personal Protective Equipment (PPE).

Medical device manufacturer, J-Pac Medical, is now producing face shields at its plant in Somersworth, New Hampshire, USA, and has opted to use lightweight Plastazote LD15 in a 38mm (1.5”) headband. As Plastazote possesses closed cell characteristics, it prevents moisture absorption and provides protection from vertical contaminants. These properties also mean that Plastazote can be reliably cleaned or disinfected with standard chemicals if reuse is necessary. Additionally, Plastazote is soft and flexible, and is therefore comfortable even for extended periods, with the risk of skin irritation kept to a minimum.

Plastazote works via Zotefoams’ method of expansion, which is conducted using pure nitrogen – a substance that makes up 78% of the air we breathe. Other manufactures may use chemical reactions which can result in residues in the material following expansion of the foams. This residue can cause complications such as sensory and skin irritation.

As well as PPE applications, there is also a demand for oxygenation and breathing aids. As Plastazote is inert, non-toxic and easily fabricated, it is a suitable material for lightweight components in ventilators.

David Stirling, CEO of the Zotefoams Group, commented: “This is a uniquely challenging and worrying time for all of us, but the knowledge that Plastazote is playing such an important role is creating a real sense of shared purpose across our global team. Knowing that we are contributing to the protection of frontline workers is inspiring, and I am proud of the way Zotefoams employees are adapting to different ways of working.”