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The detailed description explains shortcomings of conventional low-melting fiber fusion techniques and the inventor’s solution to improve adhesion and strength for durable linen-like characteristics.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & 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patent?","Question",{"text":63,"@type":64},"The patent is about a polyester spun yarn made as a blended spun yarn using two types of polyester fibers (A) and (B).","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How are fiber (A) and fiber (B) defined in the scope of the patent claim?",{"text":68,"@type":64},"Fiber (A) is polyester fiber with the usual melting point, while fiber (B) is a core-sheath conjugated polyester fiber where the core uses the usual-melting polyester component and the sheath uses a low-melting polyester component at 150–200°C.",{"name":70,"@type":61,"acceptedAnswer":71},"Why do conventional techniques have limitations, according to the detailed description?",{"text":72,"@type":64},"Conventional techniques can greatly damage low-melting fibers during spinning due to their weak strength, which reduces bonding strength and leads to lower yarn strength, making it difficult to impart a durable linen-like feel after repeated 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Hideo Fujijawa andOsamu Kanetsuki.8 p.  \nPatent(Japanese)No.59-15530(1984).Filed:  TRANSLATION NO.4588.  \n51  \n19 THE PATENT OFFICE OF JAPAN(JP)  \n# 12 OFFICIAL GAZETTE FOR UNEXAMINED PATENTS(A)\n\n11 Disclosure Number15530-1984  \n51 Int.c1.3IdentificationIntra-agency File Nos.SymbolsD 02 G 3/047720-4L  \n# 43 Date of Provisional Publication\n\nJanuary 26,1984  \none  \nNot requested  \n(total 4 pages)  \n123265-1982  \nJuly 15,1982  \nHideo Fujikawa  \nAnjo-shi,MinowamachiToriyakane 46-2  \nOsamu Kanetsuki  \nOkazaki-shi,Niki-choAza Kawagoshi 48  \nNippon Ester K.K.  \nOkazaki-shi,Hinakita-cho 4-1  \nAttorney,Yuzo Kotama  \nNumber of InventionsRequest for Examination  \n54 Polyester spun yarn  \n# 21 Application Number\n\n22 Filing Date  \n72 Inventors  \n71 Applicant  \n74 Agent  \nDigitized by the Internet Archivein 2017  \nhttps://archive.org/details/polyesterspunyar0Ofuji  \nSpecifications  \n# 1.Title of Invention\n\nPolyester spun yarn.  \n# 2.Scope of Patent Claim\n\nPolyester spun yarn which is a blended spun yarn comprisingtwo types of polyester fiber(A)and(B)in which fiber(A)ispolyester fiber with the usual melting point,fiber(B)is acore-sheath conjugated polyester fiber in which a polyestercomponent with the usual melting point is the core and a  \npolyester component with a low melting point of 150~200℃ is thesheath,the blending proportion of fiber(B)being 10~908.  \n# 3.Detailed Description of the Invention\n\nThis invention concerns spun yarn with an outstanding linenfeel in textiles due to suitable heat treatment.  \nFibers with a high melting point are usually blended withfibers which have a low melting point and the fibers with lowmelting point are melted through heat treatment to produce spunyarn with a linen-like feel.  Numerous proposals of suchtechniques have been put forth in the past.  \nExamples include the method in which two or more types ofthermoplastic synthetic fibers with different fusion temperaturesare fused while twisted(Patent Publication No.14586-1971),themethod in which some of the two or more types of fibers withdifferent melting points are subjected to heating fusion by hotplates while stretched(Patent Disclosure No.96254-1977),themethod in which the blended spinning rate of the low meltingpoint component is 3~15 wt.8 and the fusion rate in spun yarn is  \n0.4~0.02 wt.8(Patent Disclosure No.4000-1975),the method inwhich a fiber bundle containing low melting point fibers istwisted and subjected to heat treatment to produce spun yarn inwhich the low melting point fibers are fused(Patent DisclosureNo.9052-1973),the method in which open-ended spun yarn contains5~20 wt.8 of low melting point fibers which are fused to highmelting point fibers(Patent Disclosure No.344-1979),the methodin which low melting point filaments or spun yarn are inserted in  \nthe core when twisting spun yarn and heat treated,therebybonding the core yarn to the adjacent inner surfaces(PatentDisclosure No.158340-1980),and the method in which cloth with a10~20%blend of fibers with a melting point 50℃ lower than thatof heat-resistant synthetic fibers are blended with said fibersfollowed by heat treatment to induce bonding(Patent DisclosureNo.69202-1979).  However,in these conventional techniques,thefibers are greatly damaged during spinning due to the weakstrength of the low melting point fibers themselves.  Thus,thefiber layers lack the bonding strength of binders which developsin card machines etc.  This results in a decline in the strengthof the spun yarn,making it difficult to impart the durable feelcharacteristic of linen following repeated folding.  Thus,spunyarn with the feel of linen could not be produced.  \nThe inventors have conducted thorough examinations toeliminate such defects of conventional techniques and havediscovered that the adhesion could be improved,the strengthcould be enhanced and spun yarn with the outstanding feel oflinen for textiles following heat treatment could be produced byusing a core-sheath ","cbCaioOdfD12UGXq","https://ap.wps.com/l/cbCaioOdfD12UGXq","pdf",807891,"English","# 1. Title of Invention\n# 2. Scope of Patent Claim\n# 3. Detailed Description of the Invention","[{\"question\":\"What is the main subject of the patent?\",\"answer\":\"The patent is about a polyester spun yarn made as a blended spun yarn using two types of polyester fibers (A) and (B).\"},{\"question\":\"How are fiber (A) and fiber (B) defined in the scope of the patent claim?\",\"answer\":\"Fiber (A) is polyester fiber with the usual melting point, while fiber (B) is a core-sheath conjugated polyester fiber where the core uses the usual-melting polyester component and the sheath uses a low-melting polyester component at 150–200°C.\"},{\"question\":\"Why do conventional techniques have limitations, according to the detailed description?\",\"answer\":\"Conventional techniques can greatly damage low-melting fibers during spinning due to their weak strength, which reduces bonding strength and leads to lower yarn strength, making it difficult to impart a durable linen-like feel after repeated folding.\"}]","Polyester spun yarn - Patent - Detailed Description of the Invention | PDF",1789964509]