[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-325559-105":59,"doc-detail-325559-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","a-method-for-the-production-of-polypropylene-sheets-having-an-improved-transparency","A METHOD FOR THE PRODUCTION OF POLYPROPYLENE SHEETS HAVING AN IMPROVED TRANSPARENCY","","Method for producing polypropylene sheets with improved transparency using a polypropylene resin having low melt flow index (MFI) containing dibenzylidenesorbitol or its nuclear substitution derivative as a transparent nucleating agent. Sheets are molded by extruding the resin from the die tip while maintaining the die temperature in a higher temperature range than normally used. The invention targets transparency limits of low-MFI polypropylene sheets for compression molding and vacuum molding, providing sheets suitable for such processing.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/a-method-for-the-production-of-polypropylene-sheets-having-an-improved-transparency/325559/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/a-method-for-the-production-of-polypropylene-sheets-having-an-improved-transparency/325559.png","ImageObject",300,407,{"name":92,"@type":93},"Oliver","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-21",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What resin properties does the method require for polypropylene sheets?","Question",{"text":113,"@type":114},"The method uses a polypropylene resin with a low melt flow index (MFI) of 0.1–1.5 g/10 minutes.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Which transparent nucleating agent is used?",{"text":118,"@type":114},"The resin contains dibenzylidenesorbitol or its nuclear substitution derivative as a transparent nucleating agent.",{"name":120,"@type":111,"acceptedAnswer":121},"How is the die temperature handled during extrusion molding?",{"text":122,"@type":114},"The resin is extruded from the die tip while the die temperature is set to a higher range than normally used for molding sheets.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},325559,1790786913,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":146,"preview_page_count":4},8796095461610,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Ueki,T。,and others  \nPreparation method for polypropylenesheets having an improved transparency.10 p.  \nPatent (Japanese)No.58-101136(1983).Filed:   TRANSLATION NO.4409  \napanese Kokai Patent No.Sho 58[1983]-101136  \nInt.c₁³.:  \n6609-4JSequence Nos.for Office Use:7415-4F7342-4J  \nApplication No.:  \nApplication Date:  \nPublication Date:  \nInventors:  \nApplicant:  \nJAPANESE PATENT OFFICEPATENT JOURNALKOKAI PATENT NO.:  Sho 58[1983]-101136  \nC 08 L 23/10C 08 J 5/18C 08 K 5/05  \nSho 56[1981]-19841l  \nDecember ll,1981  \nJune l6,1983  \n# A METHOD FOR THE PRODUCTION OF POLYPROPYLENE SHEETSHAVING AN IMPROVED TRANSPARENCY\n\nKatsuyuk Usami,2882 Iijima-cho,Tozuka-ku,Yokohama  \nHajime Chitoku,5~2-1l,Omoriminami,Ota-ku,Tokyo  \nTakashi Takahashi,5-45,Dai 4-chome,Kamakura  \nMitsui Toatsu Kagaku K.K.,3-2-5,Kasumigaseki,Chiyoda-ku,Tokyo  \nDigitized by the Internet Archivein 2019  \nhttps://archive.org/details/preperationmetho00ueki  \nPage 2  \nlaim  \n# A method for the production of polypropylene sheets\n\nlaving an improved transparency characterized by the fact thatin order to mold sheets of polypropylene resin that containslibenzylidene sorbitol or its nuclear substitution derivativeas a transparent nucleating agent and whose melt flow indexis 0.1-1.5 g/10 minutes is extruded from the tip of the diewhose temperature is maintained at 260-350℃.  \n# Detailed explanation of the invention\n\nThe present invention concerns a method for the productionof sheets having an excellent transparency using polypropyleneresin whose melt flow index (referred to as MFI hereafter)is low.  In particular,the present invention concerns amethod for the production of polypropylene sheets having anexcellent transparency characterized by the fact that in orderto mold sheets a polypropylene resin with a low melt flowindex which contains a particular transparent nucleating agentis extruded from the tip of the die whose temperature is setat a higher range of temperatures than that normally used.  \nAs plastic materials suitable for sheet processed  \nproducts,various materials such as polyvinyl chloride,poly-styrene,polypropylene,polyethylene,and ABS are used.  Amongthese,polypropylene is excellent in thermostability,oilresistance,anti-steam permeability and food sanitation  \nproperty and recently has been utilized frequently for variouspackaging containers such as trays and cups.  \nPage 3  \nAs a method for molding containers from sheets,in general,a compression molding method and a vacuum molding method areused.  Since polypropylene sheets have a tendency of droopingdown when heated,MFI is limited to a range of 0.1-1.5 g/10minutes.  When polypropylene is used for containers,thetransparency of polypropylene resin is inferior to that ofpolyvinyl chloride and of polystyrene.  Thus,many attemptsto improve the transparency of the polypropylene sheets arebeing made.  \nFor example,when MFI is greater than 2 g/10 minutes,sheets having an excellent transparency can be obtained by  \nadding a transparent nucleating agent 0.05-0.5号to polypropyleneand then extruding it in a regular way.  However,the sheetsmade from polypropylene with an MFI of 0.1-1.5 g/10 minutesbeing used for compression molding and vacuum molding do notpossess a satisfactory transparency.  The present inventorshave expended great efforts in developing a method for theproduction of sheets with an excellent transparency usingpolypropylene with a low MFI and have found that polypropylenesheets which are excellent in transparency and suitable forcompression molding and vacuum molding can be obtained by thefollowing method.  Namely,the present invention is a methodfor the production of polypropylene sheets having an improvedtransparency characterized by the fact that in order to moldsheets a polypropylene resin that contains dibenzylidenesorbitol or its nuclear substitution derivative as a trans-parent nucleating agent and whose MFI is 0.1-1.5 g/10 minutesis extruded from the tip of the die whose temperature is  \n一","cbCaib14YPEHioTd","https://ap.wps.com/l/cbCaib14YPEHioTd","pdf",1284372,34,"English","# A METHOD FOR THE PRODUCTION OF POLYPROPYLENE SHEETS HAVING AN IMPROVED TRANSPARENCY\n## Detailed explanation of the invention","[{\"question\":\"What resin properties does the method require for polypropylene sheets?\",\"answer\":\"The method uses a polypropylene resin with a low melt flow index (MFI) of 0.1–1.5 g/10 minutes.\"},{\"question\":\"Which transparent nucleating agent is used?\",\"answer\":\"The resin contains dibenzylidenesorbitol or its nuclear substitution derivative as a transparent nucleating agent.\"},{\"question\":\"How is the die temperature handled during extrusion molding?\",\"answer\":\"The resin is extruded from the die tip while the die temperature is set to a higher range than normally used for molding sheets.\"}]","A METHOD FOR THE PRODUCTION OF POLYPROPYLENE SHEETS HAVING AN IMPROVED TRANSPARENCY | PDF",1789970828,86]