Invention Grant
- Patent Title: Process for producing pellet of ethylene/vinyl alcohol copolymer
- Patent Title (中): 制备乙烯/乙烯醇共聚物颗粒的方法
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Application No.: US10521468Application Date: 2003-07-14
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Publication No.: US08163212B2Publication Date: 2012-04-24
- Inventor: Naohiko Uchiumi , Noriyuki Kida , Hiroyuki Shimo , Kaoru Ikeda
- Applicant: Naohiko Uchiumi , Noriyuki Kida , Hiroyuki Shimo , Kaoru Ikeda
- Applicant Address: JP Kurashiki-shi
- Assignee: Kuraray Co., Ltd.
- Current Assignee: Kuraray Co., Ltd.
- Current Assignee Address: JP Kurashiki-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2002-210194 20020718
- International Application: PCT/JP03/08897 WO 20030714
- International Announcement: WO2004/009313 WO 20040129
- Main IPC: B29B9/06
- IPC: B29B9/06

Abstract:
The present invention provides a process for producing pellet of EVOH comprising the steps of introducing an EVOH solution containing alcohol into an apparatus, contacting the solution with water in the apparatus to let out the alcohol with water and then letting out an EVOH hydrous composition from the above-mentioned apparatus (step 1); cutting the EVOH hydrous composition let out therefrom to obtain EVOH hydrous composition pellets (step 2); introducing the obtained EVOH hydrous composition pellets into a dryer to reduce a water content thereof (step 3); melt-kneading the pellets, whose water content is reduced, in an extruder (step 4); and cutting EVOH discharged from the extruder to obtain the pellet of EVOH (step 5). Thus, the EVOH hydrous composition obtained by removing alcohol without deteriorating the environment can be efficiently dried, and pellets having less thermal degradation in drying and a uniform shape can be obtained.
Public/Granted literature
- US20060108703A1 Process for producing pellet of ethylene/vinyle alocohol copolymer Public/Granted day:2006-05-25
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