Plastic formulation and method for the production of plastic bottles in a two-stage stretch blow-molding process
AssigneeAlpla Werke Alwin Lehner GmbH & Co. KG
InventorRobert Siegl
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Abstract
An exemplary plastic formulation is disclosed for the production of plastic bottles in a two-stage stretch blow-molding process, and includes at least 60% of HDPE (High Density Polyethylene) having a density of 0.941 g/cm3 to 0.965 g/cm3 and according to ISO 1133 a melt index 190° C./2.16 kg of 0.1 to 0.9 g/10 min. The HDPE contains a mono-modal or multi-modal HDPE having a second melt index 190° C./21.6 kg of 5 g/10 min to 50 g/10 min according to ISO 1133. A method is disclosed for producing a plastic bottle in a two-stage stretch blow-molding process using the plastic formulation.
Claims12
Method for producing a plastic bottle in a two-station stretch blow-molding process, comprising:
- producing a preform from a plastic formulation in an injection molding process or in a flow molding process from a plastic formulation;
- and
- producing a plastic bottle separately from the preform in space and/or time, in a stretch blow-molding process, wherein the preform is axially and radially stretched, and wherein the plastic formulation is based on an at least bimodal HDPE containing at least 60% HDPE (high density polyethylene) of a density from 0.941 g/cm3 to 0.965 g/cm3 and with a first melt index 190° C./2.16 kg from 0.1 to 0.9 g/10 min according to ISO 1133, the HDPE comprising a monomodal or multimodal HDPE with a second melt index 190° C./21.6 kg from 5 g/10 min to 50 g/10 min according to ISO 1133.
Dependencies are inferred from the claim text.