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Film orientation lines

MDO (Machine Direction Orientation)

The MDO from Hosokawa Alpine allows certain film properties such as stiffness, shrinkage or rice strength to be matched exactly to your intended use.

  • More than 20 years experience in monoaxial stretching
  • The patented TRIO technology "Trim Reduction for Inline Orientation" provides significant material savings in edge trimming
  • Compared to non-oriented films of comparable thickness, oriented films have better mechanical and optical properties
  • In the case of barrier films, the orientation process also reduces permeability to gas and water vapour
  • The use of material for films can be significantly reduced

8-12 Roller System

 

  • Available layflats: 1.600 / 2.000 / 2.600 / 3.000mm
  • Film speed at inlet up to 130 m/min, outlet 350 m/min for breathable film
  • Stepless orientation ratio of up to 1:10
  • Speed control by asynchronous drives for highest speed accuracy.
  • Chrome-plated double-shell rollers with spiral grooves for best temperature homogeneity.
  • Individual heating of the rolls with oil or water

The MDO film orientation process in detail:

Heating phase
The film is conveyed along on heated rolls until it has the ideal temperature.

Stretching phase
The heated film is stretched between two rolls until it has reached the required stretching ratio.

Annealing phase
Annealing rolls reduce any tension built up during the orientation process.

Cooling phase
Film cooling and shrinking compensation

Full PE applications

The MDO is a crucial component for the production of high-performance monomaterial compounds made of polyethylenes.

Typical film applications