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The process introduces a spinning solution based on a copolymer whose principal constituents are unsaturated monomers with added acrylonitrile and ethylene oxide, or a mixed polymer with other acrylonitrile polymers, into an inert medium. After coagulation, fibers undergo primary stretching (4 to 14 times), drying at 40 to 80% free-shrinkage, then secondary stretching (1.1 to 2 times), preventing spinning-oil infiltration and whitening deterioration.",{"@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-of-manufacturing-synthetic-acrylic-fibers-translation-patent-bureau-of-japan-official-gazette-for-unexamined-patents-japanese-patent-application-publication-kokai-52-21423/323602/",{"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-of-manufacturing-synthetic-acrylic-fibers-translation-patent-bureau-of-japan-official-gazette-for-unexamined-patents-japanese-patent-application-publication-kokai-52-21423/323602.png","ImageObject",300,407,{"name":92,"@type":93},"Skyler","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-04","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 is the key goal of the invention for synthetic acrylic fibers?","Question",{"text":113,"@type":114},"To produce synthetic acrylic fibers with permanent antistatic properties and improved whiteness.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How does the method address the defects of conventional synthetic acrylic fibers?",{"text":118,"@type":114},"It prevents spinning oil infiltration into the fiber interior and mitigates deterioration in whiteness by using specific copolymer compositions and a defined coagulation and stretching process.",{"name":120,"@type":111,"acceptedAnswer":121},"What are the main process steps and stretching ranges in the method?",{"text":122,"@type":114},"A spinning solution is passed into an inert medium, introduced into a coagulation bath and coagulated, then primary stretched 4 to 14 times, dried at 40 to 80% of free shrinkage, and finally secondary stretched 1.1 to 2 times.","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},323602,1790198846,{"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},2336464648746,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","CeKanamori,T.;Yamamoto,K.;and Iwasa,T.A method of manufacturing syntheticacrylic fibers.9 p.  \nPatent(Japanese)No.52-21423(1977)·Filed:  TRANSLATION NO.4534  \n# TR AN S L AT I O NPATENT BUREAU OF JAPANOFFICIAL GAZETTE FOR UNEXAMINED PATENTS\n\nJapanese Patent Application Publication Kokai:52-21423  \nPublication Date:  February 18,1977  \nNumber of Inventions:   l  \nRequest for Examination:  (Not yet requested).  (Total of 4 pages)  \nInternational ClassIntrabureau No.  \n656l 47  \nD01F  \n6/38  \n6/54  \nD01F  \n# A METHOD OF MANUFACTURING SYNTHETIC ACRYLIC FIBERS\n\nApplication No.:  50-96664  \nApplication Date:  August l1,1975  \nInventors:T.Kanamori  \nc/o Asahi Chemical Co.,Ltd.2-1 Samejima,Fuji CityShizuoka Prefecture  \nK.YamamotoSame address as above  \nT.  IwasaSame address as above  \nApplicant:Asahi Chemical Co.,Ltd.25-1 DojimahamadoriKita-ku,Osaka City  \n## SPECIFICATION\n\n7     Title of Tnvention  \n# A Method of Manufacturing Synthetic Acrylic Fibers\n\n## 2.   Claims\n\nA method of manufacturing synthetic acrylic fibers charac-terized by passing a spinning solution consisting of a copolymerof which the principal constituents are unsaturated monomerswith acrylonitrile and ethylene oxide added or a mixed polymerof said copolymer and other acrylonitrile polymers from thespinneret into an inert medium,after which it is introducedinto a coagulation bath and coagulated and then subjected toprimary stretching of 4 to 14 times,after which it is dried ata shrinkage rate of 40 to 80%of free shrinkage and then sub-jected to secondary stretchinq of 1.1 to 2 times.  \n## 3.  Detailed Description of the Invention\n\nThis invention relates to a method of manufacturing syntheticacrylic fibers with excellent permanent antistatic properties andimproved whiteness.  \nIt is known that synthetic acrylic fibers composed of un-saturated monomers with added acrylonitrile and ethylene oxidehave superior electrostatic properties.  However,by comparisonto ordinary synthetic acrylic fibers,they have the defects thatspinning oil infiltrates into the interior of the fibers and thatthey are of inferior whiteness.  The inventors conducted variousstudies in regard to these defects,and,as a result,discoveredthe causes of the infiltration of spinning oil into the interiorof the fibers and of the deterioration in whiteness.  \nThe objective of this invention is to provide a method ofpreventing infiltration of spinning oil into the interior ofthe fibers and of obtaining fibers of superior whiteness usingfibers consisting of a copolymer of which the principal con-stituents are unsaturated monomers with acrylonitrile andethylene oxide added or a mixed polymer of said copolymer andother acrylonitrile polymers.  \nThe objective of this invention is achieved by passing a  \nspinning solution consisting of a copolymer of which the principalconstituents are unsaturated monomers with acrylonitrile andethylene oxide added or a mixed polymer of said copolymer andother acrylonitrile polymers from the spinneret into an inertmedium,after which it is introduced into a coagulation bathand coagulated and then subjected to primary stretching of 4 to14 times,after which it is dried at a shrinkate rate of 40 to 80%of free shrinkage and then subjected to secondary stretching of  \n1.1 to 2 times.  \nThe term unsaturated monomer with ethylene oxide added ofthis invention refers to mono-or dicarboxylic acids havingactive double bonds and to esters of alcohols as indicatedby the general formula  \nDigitized by the Internet Archivein 2019  \nhttps://archive.org/details/methodofmanufact0Okana  \n(wherein,R is a halogen atom or a monovalent organic residue,m is is 0 or an integer of 1 to 3 and n is an integer of 5 orgreater).  \nExamples of monocarboxylic acids include acrylic acid andmethacrylic acid and examples of dicarboxylic acids includemaleic acid,fumaric acid,itaconic acid,citraconic acid,  \nmesaconic acid and glutaconic acid.  Itaconic acid is particularlydesirable as it undergoes copolymerization we","cbCaikZORBkmtSD8","https://ap.wps.com/l/cbCaikZORBkmtSD8","pdf",783531,22,"English","# Specification\n## Claims\n## Detailed Description of the Invention","[{\"question\":\"What is the key goal of the invention for synthetic acrylic fibers?\",\"answer\":\"To produce synthetic acrylic fibers with permanent antistatic properties and improved whiteness.\"},{\"question\":\"How does the method address the defects of conventional synthetic acrylic fibers?\",\"answer\":\"It prevents spinning oil infiltration into the fiber interior and mitigates deterioration in whiteness by using specific copolymer compositions and a defined coagulation and stretching process.\"},{\"question\":\"What are the main process steps and stretching ranges in the method?\",\"answer\":\"A spinning solution is passed into an inert medium, introduced into a coagulation bath and coagulated, then primary stretched 4 to 14 times, dried at 40 to 80% of free shrinkage, and finally secondary stretched 1.1 to 2 times.\"}]","A Method of Manufacturing Synthetic Acrylic Fibers - Translation Patent Bureau of Japan Official Gazette for Unexamined Patents - Japanese Patent Application Publication Kokai 52-21423 | PDF",1789965642,55]