Method for stretching plastic nets and grids apparatus for performing the method
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United States of America Patent
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-
May 15, 2001
Grant Date -
N/A
app pub date -
Oct 29, 1998
filing date -
Nov 4, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for stretching plastic nets and grids having the peculiarity that it consists in subjecting the product to be stretched to irradiation with electromagnetic waves with a wavelength above the infrared range, so as to heat the product by dielectric loss, and in subjecting the product to traction in order to produce stretching in at least one direction. The method allows to substantially improve the ability of the polymer to absorb the energy in order to profitably perform the stretching process.
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