Low O.T.R.

Low O.T.R.

Our TPE Chemiton low O.T.R., is a compound based on HSBC and is characterized by a low gas permeability (oxygen in particular). It’s a valid alternative to halobutyl vulcanized rubber (bromobutyl, clorobutyl), and it is used in applications where a low OTR value (Oxygen Transmission Rate) is required like some food and pharmaceutical closures or vacuum proof gaskets.

Key Features
  • Based on saturated styrenic blockcopolymers (HSBC)
  • Very low gas permeability particularly against oxygen (low OTR)
  • Low water vapor permeability (low WVTR)
  • Weather, UV and ozone resistant
Available grades
  • Hardness: from 45 Shore A to 35 Shore D
  • Density from 0,94 to 1,26 g/cm³
Main markets
  • Pharmaceutical closures
  • Closures for food containers
  • Vacuum proof seals
Processing
  • Injection moulding, adhesion to polyolefinic polymers
  • Extrusion
Regulation Status
  • Compliant with 10/2011/CE (food contact) except for fatty foods and pH <4,5 water-based foods