An aging method of preform

PURPOSE: A method for aging a preform is provided to reduce the aging time, enhance a crystallinity, and to control the content of moisture. CONSTITUTION: A space for keeping an injected preform at 40-65deg.C of temperature and 55-80% of humidity is designed. The preform is aged in the space for the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KIM, HAK CHEOL, RYU, MIN YEONG, LEE, JAE SIK, SHIN, HUI CHEOL
Format: Patent
Sprache:eng ; kor
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