Applications / Agriculture / TIF Fumigation (Mulch) Films


Increase production yields, improve safety and reduce waste and chemical emissions into the environment.

TIF: Totally Impermeable Film

The use of fumigant gases in agriculture helps produce high quality vegetables, fruit and flowers.  Held in place with plastic sheeting, they sterilise the soil - eliminating pests like nematodes, bacteria, and fungi - boosting yields.  However, using standard plastic sheeting lets some gas escape into the environment, often with unwelcome side effects.

Methyl bromide was a commonly used fumigant, but is an ozone depleting gas, and the Montréal Protocol of 1997 started the search for cost-effective alternatives.  Many are less harmful for the ozone, yet may cause acute and chronic health risks to field workers and nearby communities. Changing the fumigant gas is not enough; to be both effective and safe, the entire fumigation process must be made as efficient as possible.

Adding an EVAL™ barrier layer to fumigant films sharply improves gas retention, blocking permeation to keep fumigants in the soil.  The improvement is so dramatic compared to other films, that the EVAL™-containing structure has been called TIF, or "Totally Impermeable Film".

Below, a comparison of fumigant retention of TIF vs. LDPE film.

soilretentionTIF California Ag 2013 fieldtrial2 strawberries tif in field
TIF performance in
"California Agriculture"

More efficient fumigation means fewer chemical emmissions into the environment. Both initial peak and total chemical emissions can be sharply reduced. Lower permeation means improved safety for farm workers and reduced buffer zones near inhabited areas.voc emissions