ONDA STRETCH ®

LONGITUDINAL MICROWAVES OF THE ONDASTRETCH FILM. THE FILM THAT, TOGETHER WITH THE MOST RECENT BIO-ORIENTED, IS THE BASIC FOR ALL AKRO BRAIN PRODUCTS.

Stretch film for packaging - The longitudinal reinforcement microwaves with adjustable size of the Ondastretch base film are generated during the extrusion of the film. Their primary function is to increase the tear resistance and definitely improve the elongation of the film in the horizontal direction. Furthermore, if subjected to transverse stresses caused by non-homogeneous shapes of the products, they compact and stabilize the palletized unit in the best possible way. When wrapping delicate packages, the reinforcement waves do not leave traces of engraving. Being incorporated into the film, during the pre-stretching phase they do not generate detachment phenomena which cause interruptions in the production cycle.  

The total thickness of the Ondastretch film normally varies from 8 to 17 my since the very high toughness of the film does not require greater thicknesses however achievable.

Taking advantage of its elastic properties, the film is cold stretched and wrapped around the product to be packaged. As soon as the stretching force ceases, the elastic return of the film determines a clamping force on the packaging.

The four properties necessary to evaluate the characteristics and good quality of the product are the following:

• Elastic module: indicates the resistance to elongation opposed by the material in its elastic phase (measures the stiffness of the film).
• Yield point: this is the point that indicates the elasticity limit of the film beyond which the specimen no longer regains its original shape.
• Stress at break: it is the maximum tension that the film can withstand. It expresses the power to contain the load, therefore the ability to guarantee the stability of the packaged goods when the film is brought to maximum pre-stretch.
• Elongation at break: measures the maximum extensibility of the film subjected to traction and is expressed as a percentage of the initial dimensions.