PARAFILM® M
Physical properties

Physical properties
Toxicity: non-toxic
Melting point: 60 °C
Flash point: 301 °C
Temperature range (continuous use): -45 °C to +50 °C
Stretching ability: 200%
Elongation at tear: 300%

Gas permeability in 24 hours at 23 °C and 50% relative humidity:
O2 (oxygen): £ 350cm³/m²
N2 (nitrogen): £ 105cm³/m²
CO2 (carbon dioxide): £ 1100cm³/m²

Water vapor permeability in 24 hours at 37 °C and 90% relative humidity: 0.8 g/m² (Vapor pressure from volatile substances may lift PARAFILM®M off the edge of the vessel.)

Physiological properties
PARAFILM®M is free from plasticizers and consists primarily of polyolefins and paraffin waxes. If PARAFILM®M comes into contact with food, the relevant regulations should be observed.

Storage life
3 years without deterioration, if stored between 7 °C and 32 °C and 50% relative humidity.

Chemical resistance
PARAFILM®M is resistant up to 48 hours against many polar substances, e.g. saline solutions, inorganic acids and alkaline solutions. After this period embrittlement may occur.

 

Effects of 48 hours exposure at 23°C:
 Acids:  Hydrochloric acid 36.5% resistant 

Sulphuric acid 98% resistant
   Nitric acid 95% resistant (brown discoloration)
 Alkaline solutions:  Sodium hydroxide 22% resistant 
   Ammonia 28% resistant 
Saline solutions:  Sodium chloride 20% resistant 
   Potassium permanganate 5% resistant (brown discoloration) 
   Iodine solution 0.1 mol/l resistant (brown discoloration) 
Organic solvents:  Methyl alcohol resistant 
   Ethyl alcohol resistant 
   Isopropyl alcohol resistant 
   Diethyl ether not resistant 
   Chloroform not resistant 
   Carbon tetrachloride not resistant 
   Benzene not resistant 
   Toluene not resistant 
PARAFILM®M conforms to the general requirements of the FDA (Federal Food, Drug and Cosmetic Act. USA) if used below 55°C.