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US 8,075,180 B2Granted
Rapid and easy bottle test
AssigneeTotal Petrochemicals Research Feluy
InventorFabienne Radermacher
Life of this patent
Estimating the term…
Abstract
A method for predicting the drop impact resistance of a stretch-blow molded polypropylene container which comprises the steps of measuring the initial size of the container, placing it in an oven, remeasuring its size after removing it from the oven, calculating the percentage difference in size of the container and determining its drop impact resistance, which is proportional to said difference.
Claims10
A method for predicting drop impact resistance of a stretch-blow molded polypropylene container, comprising:
- determining a correlation between shrinkage and drop impact resistance for a known container for an oven,
- measuring one initial property selected from axial length, circumference, diameter and volume of the propylene container;
- placing the propylene container in the oven, wherein a temperature of the oven is below a melting temperature of the polypropylene and is at least 120° C.;
- removing the propylene container from the oven;
- remeasuring the same property of said propylene container;
- calculating a percentage difference between the remeasured and initial property;
- and
- determining the drop impact resistance from the percentage difference and the correlation.
5 more elements
Dependencies are inferred from the claim text.