Certification of films and nets

There are many criteria that are in focus when it comes to films and nets. These include, among others, uniform material properties, tensile strength, puncture resistance, and weather resistance. Other criteria such as film thickness, film width, and film length are also important factors.

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DLG test criteria for films and nets

Silage films

  • Uniform material properties
  • Film thickness, film width, film length
  • Tear strength, elongation at tear, tear resistance
  • Puncture resistance
  • Dimensional change after heat ageing
  • Impermeability, oxygen permeability
  • Resistance to acids
  • Resistance to weathering

Bale stretch films

  • Uniform material properties
  • Film thickness, film width, film length
  • Roll weight
  • Mechanical properties: Tension, elongation at break, tear strength, puncture resistance, tear resistance, relaxation behaviour
  • Adhesive strength
  • Impermeability, oxygen permeability
  • Resistance to weathering
  • Suitability in practical testing

Bale wrapping nets

  • Net length, weight per metre
  • Mechanical properties: Maximum tensile strength, elongation at maximum tensile strength
  • Ageing behaviour, weather resistance
  • Dimensional change after heat ageing

Straw protection fleeces

  • Dimensions and weight: Length, width, thickness, surface weight
  • Strength when new: Maximum tensile strength, elongation at maximum tensile strength, tear strength, puncture resistance, strength at low and high temperatures
  • Strength after ageing: Elongation at break, maximum tensile strength, elongation at maximum tensile strength
  • Water permeability
  • Air permeability
  • Suitability in practical testing
DLG Medal Quality Seal

DLG-certified quality

The DLG quality seal stands for tested agricultural inputs. Regular testing ensures consistent quality. Special features or innovations can also be independently verified – visibly indicated directly on the certification mark.

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