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• Principle Of Hot Filling Of Pet Preforms Affaires et Finance
• The production principle of PET hot-filled bottles is: PET beverage bottles (usually injection molded into Pet Preforms) → After heating, pet preforms are longitudinally stretched → transversely stretched → blown bottled. The final molding in this...plusThe production principle of PET hot-filled bottles is: PET beverage bottles (usually injection molded into Pet Preforms) → After heating, pet preforms are longitudinally stretched → transversely stretched → blown bottled. The final molding in this production process uses mechanical cold setting, so when the PET bottle is used in the temperature of the PET glass transition temperature of 78 ° C), the molecular chain will be slack and the bottle will be seriously contracted. The bottle is only suitable for cold-filled beverages.
  In the process of stretching and shaping of the above process, the hot-filled bottle is always at a relatively high temperature (about 140 °C), and the PET molecular chain is shaped by high temperature in a relaxed state. Finally, the bottle body produces a large number of neat and dense crystals, crystallizing. The degree can reach 30% to 45%, which makes the bottle have higher heat resistance and becomes a practical hot-fill bottle.  Moins
• • preform nicole (propriétaire)
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  • Dernière mise à jour 27 avril 2019