At the exit of the opener-beater, fibres can condense and consolidate attracted by the scales now freed from the yolk; they can attract or reject each other depending on the electrostatic charges generated on their surface due to the friction between them or with other bodies.
To be rid of these problems, and therefore to facilitate the subsequent processes, the wool leaving the opener-beater undergoes the so-called "oiling" process, which lubricates the fibres by spraying on them an oily
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