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Method for Producing Containers Comprising a Narrow Opening and a Long Body by Means of Below Molding or Stretch Below Molding Polypropylene Preforms
Method for Producing Containers Comprising a Narrow Opening and a Long Body by Means of Below Molding or Stretch Below Molding Polypropylene Preforms
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机译:通过模内成型或模内拉伸以下聚丙烯预成型件生产具有窄开口和长本体的容器的方法
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摘要
The invention relates to the production of containers (2) comprising a narrow opening and a long body, such as bottles or similar, from polypropylene by means of blow moulding or stretch blow moulding. According to the invention, during the blow moulding or stretch blow moulding step, the polypropylene preform (1) undergoes longitudinal stretching at a ratio (L/1) of between approximately 2 and 3.5 and radial stretching (D/d) at a ratio of between approximately 2 and 3.
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