PRODUCTION METHOD OF THREAD FOR VASCULAR STENT
PROBLEM TO BE SOLVED: To provide thread for a vascular stent having excellent dynamic characteristics and capable of surely supporting a vessel having large contraction force from the inside.SOLUTION: In a method, thread for a vascular stent is produced by melt spinning resin material composed of po...
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| creator | IGAKI KEIJI YAMADA HIROICHI |
| description | PROBLEM TO BE SOLVED: To provide thread for a vascular stent having excellent dynamic characteristics and capable of surely supporting a vessel having large contraction force from the inside.SOLUTION: In a method, thread for a vascular stent is produced by melt spinning resin material composed of poly L-lactic acid having weight average molecular weight of 70,000 to 550,000. The resin material composed of poly L-lactic acid is subjected to first drying treatment in a reduced-pressure atmosphere in a first temperature range of a glass transition point Tg of poly L-lactic acid or more, and then is subjected to second drying treatment in a reduced-pressure atmosphere in a temperature range higher than the first temperature range and a melting point of poly L-lactic acid or less. The resin material subjected to two-stage drying treatment is melt spun, and drawn in a temperature of the glass transition point Tg of poly L-lactic acid or more and the melting point thereof or less, thereby obtaining the thread for a vascular stent.
【課題】 力学的特性に優れ、大きな収縮力を有する脈管をその内部から確実に支持することができる脈管ステント用の糸を提供する。【解決手段】重量平均分子量を７０，０００〜５５０，０００とするポリＬ−乳酸からなる樹脂素材を溶融紡糸して脈管ステント用の糸を製造する方法である。ポリＬ−乳酸からなる樹脂素材は、ポリＬ−乳酸のガラス転移点Ｔｇ以上の第１の温度範囲にある減圧雰囲気中で第１の乾燥処理が施され、次いで、ポリＬ−乳酸の融点以下であって第１の温度範囲より高温の温度範囲にある減圧雰囲気中で第２の乾燥処理が施される。２段階の乾燥処理が施された樹脂素材は、溶融紡糸され、次いで、ポリＬ−乳酸のガラス転移点Ｔｇ以上融点以下の温度で延伸されて脈管ステント用糸とされる。【選択図】図１ |
| format | Patent |
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【課題】 力学的特性に優れ、大きな収縮力を有する脈管をその内部から確実に支持することができる脈管ステント用の糸を提供する。【解決手段】重量平均分子量を７０，０００〜５５０，０００とするポリＬ−乳酸からなる樹脂素材を溶融紡糸して脈管ステント用の糸を製造する方法である。ポリＬ−乳酸からなる樹脂素材は、ポリＬ−乳酸のガラス転移点Ｔｇ以上の第１の温度範囲にある減圧雰囲気中で第１の乾燥処理が施され、次いで、ポリＬ−乳酸の融点以下であって第１の温度範囲より高温の温度範囲にある減圧雰囲気中で第２の乾燥処理が施される。２段階の乾燥処理が施された樹脂素材は、溶融紡糸され、次いで、ポリＬ−乳酸のガラス転移点Ｔｇ以上融点以下の温度で延伸されて脈管ステント用糸とされる。【選択図】図１</description><language>eng ; jpn</language><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS ; BANDAGES, DRESSINGS OR ABSORBENT PADS ; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES ; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS ; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS ; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR ; FILTERS IMPLANTABLE INTO BLOOD VESSELS ; FIRST-AID KITS ; FOMENTATION ; HUMAN NECESSITIES ; HYGIENE ; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES ; MEDICAL OR VETERINARY SCIENCE ; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL ; NATURAL OR ARTIFICIAL THREADS OR FIBRES ; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES ; PROSTHESES ; SPINNING ; TEXTILES ; TREATMENT OR PROTECTION OF EYES OR EARS</subject><creationdate>2015</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150122&DB=EPODOC&CC=JP&NR=2015012890A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150122&DB=EPODOC&CC=JP&NR=2015012890A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>IGAKI KEIJI</creatorcontrib><creatorcontrib>YAMADA HIROICHI</creatorcontrib><title>PRODUCTION METHOD OF THREAD FOR VASCULAR STENT</title><description>PROBLEM TO BE SOLVED: To provide thread for a vascular stent having excellent dynamic characteristics and capable of surely supporting a vessel having large contraction force from the inside.SOLUTION: In a method, thread for a vascular stent is produced by melt spinning resin material composed of poly L-lactic acid having weight average molecular weight of 70,000 to 550,000. The resin material composed of poly L-lactic acid is subjected to first drying treatment in a reduced-pressure atmosphere in a first temperature range of a glass transition point Tg of poly L-lactic acid or more, and then is subjected to second drying treatment in a reduced-pressure atmosphere in a temperature range higher than the first temperature range and a melting point of poly L-lactic acid or less. The resin material subjected to two-stage drying treatment is melt spun, and drawn in a temperature of the glass transition point Tg of poly L-lactic acid or more and the melting point thereof or less, thereby obtaining the thread for a vascular stent.
【課題】 力学的特性に優れ、大きな収縮力を有する脈管をその内部から確実に支持することができる脈管ステント用の糸を提供する。【解決手段】重量平均分子量を７０，０００〜５５０，０００とするポリＬ−乳酸からなる樹脂素材を溶融紡糸して脈管ステント用の糸を製造する方法である。ポリＬ−乳酸からなる樹脂素材は、ポリＬ−乳酸のガラス転移点Ｔｇ以上の第１の温度範囲にある減圧雰囲気中で第１の乾燥処理が施され、次いで、ポリＬ−乳酸の融点以下であって第１の温度範囲より高温の温度範囲にある減圧雰囲気中で第２の乾燥処理が施される。２段階の乾燥処理が施された樹脂素材は、溶融紡糸され、次いで、ポリＬ−乳酸のガラス転移点Ｔｇ以上融点以下の温度で延伸されて脈管ステント用糸とされる。【選択図】図１</description><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</subject><subject>BANDAGES, DRESSINGS OR ABSORBENT PADS</subject><subject>CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES</subject><subject>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</subject><subject>DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS</subject><subject>DISINFECTION, STERILISATION, OR DEODORISATION OF AIR</subject><subject>FILTERS IMPLANTABLE INTO BLOOD VESSELS</subject><subject>FIRST-AID KITS</subject><subject>FOMENTATION</subject><subject>HUMAN NECESSITIES</subject><subject>HYGIENE</subject><subject>MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES</subject><subject>MEDICAL OR VETERINARY SCIENCE</subject><subject>METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL</subject><subject>NATURAL OR ARTIFICIAL THREADS OR FIBRES</subject><subject>ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES</subject><subject>PROSTHESES</subject><subject>SPINNING</subject><subject>TEXTILES</subject><subject>TREATMENT OR PROTECTION OF EYES OR EARS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2015</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNALCPJ3CXUO8fT3U_B1DfHwd1Hwd1MI8QhydXRRcPMPUghzDHYO9XEMUggOcfUL4WFgTUvMKU7lhdLcDEpuriHOHrqpBfnxqcUFicmpeakl8V4BRgaGpgaGRhaWBo7GRCkCADDQJiw</recordid><startdate>20150122</startdate><enddate>20150122</enddate><creator>IGAKI KEIJI</creator><creator>YAMADA HIROICHI</creator><scope>EVB</scope></search><sort><creationdate>20150122</creationdate><title>PRODUCTION METHOD OF THREAD FOR VASCULAR STENT</title><author>IGAKI KEIJI ; YAMADA HIROICHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2015012890A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2015</creationdate><topic>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</topic><topic>BANDAGES, DRESSINGS OR ABSORBENT PADS</topic><topic>CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES</topic><topic>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</topic><topic>DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS</topic><topic>DISINFECTION, STERILISATION, OR DEODORISATION OF AIR</topic><topic>FILTERS IMPLANTABLE INTO BLOOD VESSELS</topic><topic>FIRST-AID KITS</topic><topic>FOMENTATION</topic><topic>HUMAN NECESSITIES</topic><topic>HYGIENE</topic><topic>MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES</topic><topic>MEDICAL OR VETERINARY SCIENCE</topic><topic>METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL</topic><topic>NATURAL OR ARTIFICIAL THREADS OR FIBRES</topic><topic>ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES</topic><topic>PROSTHESES</topic><topic>SPINNING</topic><topic>TEXTILES</topic><topic>TREATMENT OR PROTECTION OF EYES OR EARS</topic><toplevel>online_resources</toplevel><creatorcontrib>IGAKI KEIJI</creatorcontrib><creatorcontrib>YAMADA HIROICHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>IGAKI KEIJI</au><au>YAMADA HIROICHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PRODUCTION METHOD OF THREAD FOR VASCULAR STENT</title><date>2015-01-22</date><risdate>2015</risdate><abstract>PROBLEM TO BE SOLVED: To provide thread for a vascular stent having excellent dynamic characteristics and capable of surely supporting a vessel having large contraction force from the inside.SOLUTION: In a method, thread for a vascular stent is produced by melt spinning resin material composed of poly L-lactic acid having weight average molecular weight of 70,000 to 550,000. The resin material composed of poly L-lactic acid is subjected to first drying treatment in a reduced-pressure atmosphere in a first temperature range of a glass transition point Tg of poly L-lactic acid or more, and then is subjected to second drying treatment in a reduced-pressure atmosphere in a temperature range higher than the first temperature range and a melting point of poly L-lactic acid or less. The resin material subjected to two-stage drying treatment is melt spun, and drawn in a temperature of the glass transition point Tg of poly L-lactic acid or more and the melting point thereof or less, thereby obtaining the thread for a vascular stent.
【課題】 力学的特性に優れ、大きな収縮力を有する脈管をその内部から確実に支持することができる脈管ステント用の糸を提供する。【解決手段】重量平均分子量を７０，０００〜５５０，０００とするポリＬ−乳酸からなる樹脂素材を溶融紡糸して脈管ステント用の糸を製造する方法である。ポリＬ−乳酸からなる樹脂素材は、ポリＬ−乳酸のガラス転移点Ｔｇ以上の第１の温度範囲にある減圧雰囲気中で第１の乾燥処理が施され、次いで、ポリＬ−乳酸の融点以下であって第１の温度範囲より高温の温度範囲にある減圧雰囲気中で第２の乾燥処理が施される。２段階の乾燥処理が施された樹脂素材は、溶融紡糸され、次いで、ポリＬ−乳酸のガラス転移点Ｔｇ以上融点以下の温度で延伸されて脈管ステント用糸とされる。【選択図】図１</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS BANDAGES, DRESSINGS OR ABSORBENT PADS CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DISINFECTION, STERILISATION, OR DEODORISATION OF AIR FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL NATURAL OR ARTIFICIAL THREADS OR FIBRES ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PROSTHESES SPINNING TEXTILES TREATMENT OR PROTECTION OF EYES OR EARS |
| title | PRODUCTION METHOD OF THREAD FOR VASCULAR STENT |
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