A breakthrough in injectionstretchblowmolding technology lies behind the recent introduction of a new laundry product from procter & gamble. The new bottles are stretchblowmolded from preforms that are injectionmolded from polypropylene, a resin not usually associated with reheating and blowing preforms. Previously, these forms have almost always used pet. The stress crack resistance of a pet bottle is not the best if a product contains bleach or a high concentration of detergent.
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