METHOD AND APPARATUS FOR PRODUCING PLASTIC PREFORMS
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United States of America Patent
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Jun 11, 2015
app pub date -
Oct 23, 2014
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Dec 10, 2013
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Abstract
Method for producing a plastic preform, the method comprising a first step of producing a plastic preform from raw material, and a second step of applying an outer layer to the plastic preform, wherein the outer layer forms a bond with the plastic preform, and is insoluble in aqueous solutions having a pH-value between 3 and 10, and well soluble in aqueous solutions having a pH-value in a range of less than 3 and/or more than 10.
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