Qual ?ity as?sur?ance with Openair® plasma In car head ?light pro ?duc?tion, ad?hes?ive bond?ing of the polycar?bon?ate lenses with their polypro ?pyl?ene hous?ings must sat?isfy highest de?mands on seal?ing. Even the ti ?ni ?est leaks would lead to pen ?et?ra?tion of hu ?mid?ity and con ?sequently to impair ?- ment of the head ?light lens with the res?ult that the light ra ?di?ation angle would in turn be neg ?at?ively af ?fected. HELLA Aus ?tralia, a fully owned sub?si ?di?ary of Hella KGaA Hueck & Co, Ger ?many, was star ?ted 50 years ago as the ?rst op?er?at?ing over ?seas Hella plant. Here the grooves of the PP hous ?ings are cleaned and ac ?tiv?ated with Openair® plasma through rotary jets be ?fore ap?ply ?ing a 2K-sil ?ic?one ad ?hes?ive. Dur?ing this op ?er?a?tion, the sur ?face en

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