| 摘要 |
BOTTLES, CONTAINERS AND OTHER ARTICLES ARE FORMED FROM POLYPROPYLENE COMPOSITIONS THAT INCLUDE A REHEATING AGENT, SUCH AS ANTIMONY, CARBON BLACK, GRAPHITE, TITANIUM, COPPER, MANGANESE, IRON, TUNGSTEN, GRAPHITE, INFRARED ABSORBING DYES OR OTHER INFRA-RED ABSORBING MATERIAL. THE REHEATING TIME FOR THE POLYPROPYLENE COMPOSITION IS SHORTENED FOR INJECTION STRETCH BLOW MOLDING OR THERMOFORMING, AND THE POLYPROPYLENE GRANULE COMPOSITION WITH REHEATING AGENT HAS AN L * VALUE OF AT LEAST 80% OF THE L * VALUE FOR A POLYPROPYLENE GRANULE CONTROL WITHOUT ADDED REHEATING AGENTS AS MEASURED BY THE GARDNER COLOR TEST. THE REHEATING AGENT MAY BE INCORPORATED INTO THE POLYPROPYLENE COMPOSITION BY IN SITU CHEMICA! REDUCTION OF A METAL COMPOUND, SUCH AS ANTIMONY TRIGLYCOLATE, WITH A REDUCING AGENT, SUCH AS HYPOPHOSPHOROUS ACID: IN ADDITION, THE POLYPROPYLENE COMPOSITION WITH REHEATING AGENT MAY BE DERIVED FROM A POLYPROPYLENE MASTERBATCH WITH HIGH CONCENTRATIONS OF REHEATING AGENT. |
