Method and device for producing hollow bodies
OwnerVolker Kronseder, Heinz Humeleinventors
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Abstract
A method and device for producing hollow bodies comprising a gas barrier coating, in particular PET containers comprising a coating of polyvinyl alcohol. The hollow bodies are treated in a device for increasing the surface energy of the surface to be coated and then in a coating device and a drier. To improve the gas barrier effect of the gas barrier coating, a multi-stage pre-treatment is disclosed, in which the hollow body is subjected to an electrostatic discharge after the treatment for increasing the surface energy.
Claims15
Method for manufacturing hollow bodies with a gas barrier coating with a coating agent having a polyvinyl alcohol base, where a hollow body of surfaces to be treated is subjected to a preliminary treatment to increase surface energy, coated and then dried, comprising a multi-step preliminary treatment, where the hollow body is electrostatically discharged after the increase in the surface energy.
Device for the manufacture of hollow bodies (2) with a gas barrier coating, in particular containers made of PET, in particular with a polyvinyl alcohol-based coating, comprising a device (8) to increase the surface energy of the surface to be coated, a coating device (10), a dryer (14), and a multi-step preliminary treatment section (6) having a device (9) for electrostatically discharging the surface (2c) to be treated, which device is arranged after the device (8) to increase the surface energy.
Dependencies are inferred from the claim text.