Laser processing of recyclable films
AssigneeLaserSharp FlexPak Services, LLC
InventorsJustin Averbeck, Juan Carlos Tinoco
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Abstract
A method for laser scoring a film comprising at least 90% polyolefin comprises scoring a moving web of the film by utilizing the peak pulse power of a laser at a frequency of about 20 kHz or less to create a scored film with a score feature comprising a series of non-overlapping scored spots. In another aspect, a laser scored film comprises at least 90% polyolefin; and a score feature comprising a series of laser-formed non-overlapping scored spots on the film having a cut size of between 0.15 mm and less than 0.5 mm, and a tie length between 0.15 mm and less than 0.5 mm.
Claims17
A method for laser scoring a film comprising at least 90% polyolefin, comprising:
- scoring a moving web of the film by utilizing a peak pulse power of a CO2 laser at a frequency of about 20 kHz or less to create a scored film with a score feature comprising a series of non-overlapping scored spots;
- moving the web of the film at a speed of 100 ft/min or greater;
- and
- controlling the CO2 laser to have a power difference of at least about 135 watts between an average local maximum and average local minimum measured power.
A method for laser scoring a film comprising at least 90% polyolefin, comprising:
- scoring a continuously moving web of the film by utilizing a peak pulse power of a CO2 laser at a frequency of about 15 kHz or less to create a scored film with a score feature comprising a series of non-overlapping scored spots;
- moving the web of the film at a speed of 100 ft/min or greater;
- and
- controlling the CO2 laser to have a power difference of at least about 135 watts between an average local maximum and average local minimum measured power.
Dependencies are inferred from the claim text.