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...

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Bibliographische Detailangaben
Hauptverfasser:	KIM, HAK CHEOL, RYU, MIN YEONG, LEE, JAE SIK, SHIN, HUI CHEOL
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	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 time from 30 minutes to 4 hours. After aging, the content of moisture of the preform is 1000-2000ppm. Glass transition temperature is 80-85deg.C and crystallization temperature is 137-142deg.C. According to the aging method, time for aging work is reduced. Since the content of moisture of the preform is controlled, residual stress is minimized while crystallinity is enhanced. Using the preform, a container of high heat resistance is produced. 본 발명은 프리폼의 에이징 방법에 관한 것으로, 더욱 상세하게는 사출된 프리폼을 일정한 온도 및 습도가 유지된 공간에 일정시간 통과시키는 에이징 방법에 있어서, 상기 사출된 프리폼을 온도 40 ∼ 65 ℃, 습도 55 ∼ 80%로 조절할 수 있도록 설계된 공간에서 30분 ∼ 4시간 동안 에이징함으로써, 종래 에이징 방법에 비하여 시간이 단축되어 프리폼의 보관에 따른 공간활용을 증대시키고, 상기 에이징된 프리폼이 일정 범위의 수분 함량을 갖도록 조절하며 잔류응력을 최소화하고 결정화도를 높이고 음료용 바틀에 적용시 높은 결정화도로 인한 우수한 내열성으로 고온음료에도 적합하게 사용할 수 있으며, 제품의 불량률이 개선된 프리폼의 에이징 방법에 관한 것이다.