Parafilm

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A carton box with Parafilm.

Parafilm is a semi-transparent, flexible film composed of a proprietary blend of waxes and polyolefins. Parafilm is a registered trademark of Bemis Company, Inc, headquartered in Neenah, WI (United States). It is a ductile, malleable, non-toxic, tasteless & odorless self-sealing thermoplastic.

Laboratories[edit]

Parafilm M is commonly used in health care, pharmaceutical and research laboratories for covering or sealing vessels such as flasks, cuvettes, test tubes, beakers, petri dishes and more.

Because it melts at a low temperature, Parafilm M is not safe for use in an autoclave.

Many organic solvents will dissolve Parafilm M[1].

Produce[edit]

Parafilm M is wrapped around the freshly cut crown of bananas, pineapples and other produce instead of using fungicides or other coatings to prevent rot.

Stem wrap[edit]

Florists use Parafilm Stem Wrap to extend the flower's life by protecting moisture in the stem as a floral tape[2].

Grafting[edit]

Horticulturalists use Parafilm Grafting Tape in grafting. Several grafting styles call for wrapping a graft to hold it together, and sealing it to prevent drying and Parafilm Grafting Tape does both. In this context Parafilm is also known as grafting tape.

Other applications[edit]

Modeling[edit]

Parafilm M is used by some modelers as a masking material during airbrushing, due to its lack of adhesion, which can destroy a finish.

Entomology[edit]

Entomologists have used Parafilm M as a membrane to feed hematophagous insects such as mosquitoes and bedbugs[3] reared in the lab.

Microfluidics[edit]

A new application of Parafilm M is to make paper-based microfluidic devices.[4] Paper-based microfluidic devices are considered a suitable way to fabricate low-cost point-of-care diagnostics for developing countries and areas where expensive medical instrumentation is not accessible. Digital microfluidic devices can also use it as the electrode insulator and hydrophobic layer [5]

Sealon film[edit]

A similar but now long discontinued product was Sealon film by Fuji.[6][7]

See also[edit]

References[edit]

  1. ^ Miller, David (17 May 2012). "Parafilm : Frequently asked questions".
  2. ^ "What is Parafilm Stem Wrap? | The Koch Blog". 2013-05-31. Retrieved 2019-02-19.
  3. ^ Jr, Donald G. McNeil (30 August 2010). "Bedbugs Crawl, They Bite, They Baffle Scientists". The New York Times.
  4. ^ "Simple and rapid fabrication of paper microfluidic devices utilizing Parafilm® «  Chips and Tips". rsc.org.
  5. ^ "A two-for-one dielectric and hydrophobic layer for digital microfluidics «  Chips and Tips". rsc.org.
  6. ^ Mitsuhashi, Jun (1979). "Materials for Artificial Rearing of Leafhoppers". In Maramorosch, Karl & Harris, Kerry F. (eds.). Leafhopper Vectors and Plant Disease Agents. Academic Press. p. 375.
  7. ^ Takahashi, K.; Mogi, I.; Awaji, S.; Watanabe, K. (2011). "Non-contact measurement of diamagnetic susceptibility change by a magnetic levitation technique". Measurement Science and Technology. 22 (3): 035703. Bibcode:2011MeScT..22c5703T. doi:10.1088/0957-0233/22/3/035703.

External links[edit]