PREPARING METHOD OF THIN FILM HAVING HIGH SHRINGKAGE RATIO AND APPARATUS THEREOF

PURPOSE: A manufacturing method of a high contraction thin film and a device thereof are provided to pack firmly by manufacturing the high contraction film or sheet with increasing elongation, and to improve working efficiency by extruding and drawing in the same line. CONSTITUTION: A high contracti...

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Bibliographische Detailangaben
Hauptverfasser:	HAM, TAE WON, KIM, YOUNG HAN, AN, YOUNG BAE
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 manufacturing method of a high contraction thin film and a device thereof are provided to pack firmly by manufacturing the high contraction film or sheet with increasing elongation, and to improve working efficiency by extruding and drawing in the same line. CONSTITUTION: A high contraction thin film manufacturing system is composed of an extruder(1) discharging high pressure and temperature molten resin; an inflation die(3) forming a tube type film(4) by blowing air to molten resin and drawing; a guide plate(5) and pinch rolls(6) forming the flat film or sheet by deflating the inflated film; a heating unit(9) heating the deflated film optimally for second drawing; and a draw roll(8) elongating the heated film or sheet by nip-pressing in the same direction of film produce line. The thickness deviation is reduced, and the productivity is increased by performing first and second drawing processes successively. 이 발명은 수축률이 향상된 고수축 필름의 제조 방법 및 그 장치에 관한 것으로서, 특히 상향 인플레이션용 다이에서 압출되어 1차 인플레이션된 필름 또는 시트를 일정 온도로 가열된 가열봉이나 가열된 금형롤 또는 가열판을 경유시키면서 2차 연신시킴으로써 수축률이 크게 향상된 필름 또는 시트를 제조할 수 있으며, 필름 또는 시트의 연신 공정을 동시에 수행할 수도 있고 고온 연신공정을 거친 후 일직선상에서 바로 냉각함으로써, 포장용 고수축 필름 또는 시트를 제조할 수 있음은 물론, 연신공정을 한번 더 거치므로써 박층의 필름을 생산할 수 있고, 수축력을 크게 향상시킬 수 있으며 두께의 편차가 적은 필름의 연속생산이 가능하여 생산성을 향상시킬 수 있는 고수축용 박층 필름의 제조방법 및 그 장치가 제공된다.