Preventing preform damage during production: towards perfect products
In today’s packaging market scuff marks and surface scratches are no longer acceptable on PET containers. During production of preforms, e.g. conveying and storage bin filling, the preforms fall, bounce and hit each other creating scratches. These are subsequently enlarged into visible surface imperfections during the stretch blow moulding process. One solution to this problem focuses on the reduction of the coefficient of friction (COF) during preform production. Lowering of the COF results in an easier release of the preforms from the cavities, scratch-free preforms and fewer drop marks due to lower friction from preforms falling into the octabin. Holland Colours’ new slip additive, Holcoslip 271-series, which has this desired effect, will be the main topic of this article.