ãŸãšã
- EPDM ã·ãŒã«ã¯ãåªããèè¬åæ§ãèç±æ§ãæè»æ§ãåããŠããããšã§ç¥ãããŠãããããŸããŸãªç£æ¥çšéã«éåžžã«é©ããŠããŸãã
- EPDM ã·ãŒã«ã¯ãã³ã¹ãå¹çãé·å¯¿åœãæå°éã®ã¡ã³ããã³ã¹èŠä»¶ãç¹åŸŽãšããèªåè»ãèªç©ºå®å®ãæ°ŽåŠçãªã©ã®åéã§å€§ããªå©ç¹ãæäŸããŸãã
- éé žåç©ç¡¬å EPDM ãšç¡«é»ç¡¬å EPDM ã®éžæã«ãããç¹å®ã®çšéã®ããŒãºã«åããã埮åŠãªãªãã·ã§ã³ãæäŸãããããã«å¿ããŠæ©æ¢°çç¹æ§ãšååŠçç¹æ§ã«åœ±é¿ããŸãã
å°å ¥
é©åãªã·ãŒãªã³ã°æã®éžæã¯ãããŸããŸãªç£æ¥çšéã§æ§èœã寿åœãå®å šæ§ãæé©åããäžã§éèŠãªèŠçŽ ã§ãããšãã¬ã³ãããã¬ã³ãžãšã³ã¢ãã㌠(EPDM)ã¯ãå€æ§ãªç£æ¥èŠä»¶ã«é©ããå¹ åºãæ©èœãšå©ç¹ãæäŸãããåªããææãšããŠéç«ã£ãŠããŸãããã®ããã°ã§ã¯ãEPDM ã·ãŒã«ãå æ¬çã«åæãããã®ç¹åŸŽãå€é¢çãªå©ç¹ãäžè¬çãªçšéã解説ããŸããããã«ããã®èšäºã§ã¯ãããŸããŸãªçš®é¡ã® EPDM 硬åå€ã®äžããéžæããéã«èæ ®ãã¹ãå€æ°ã«ã€ããŠã説æããŸãã
EPDMãšã¯äœã§ãã?
ãšãã¬ã³ãããã¬ã³ãžãšã³ã¢ãããŒïŒEPDMïŒã¯ãããŸããŸãªç°å¢æ¡ä»¶ã«èããããããšã§ç¥ãããåæãŽã ãšã©ã¹ãããŒã§ããç³æ²¹ãšå€©ç¶ã¬ã¹ããåŸããããšãã¬ã³ãšãããã¬ã³ãäž»æåãšããEPDMã«ã¯ãæ¶æ©å€ãšããŠæ©èœãããžãšã³æåãå«ãŸããŠããŸãããã®ç¬èªã®ååŠçµæã«ãããEPDMã¯ãªãŸã³ã極æ§ç©è³ªãæž©æ°Žãšå·æ°Žã«å¯ŸããŠåªããèæ§ãçºæ®ããŸãã
EPDM 㯠1960 幎代ã«éçºãããèªåè»ãèªç©ºãªã©ã®æ¥çãå³ããç°å¢ã«èããããããé äžãªçŽ æãæ±ããŠãããšãã«ç»å ŽããŸããããã以æ¥ãEPDM ã¯ãã®åªããæ©æ¢°çç¹æ§ã«ãããããŸããŸãªç£æ¥çšéã§ä¿¡é Œã§ããéžæè¢ãšãªã£ãŠããŸããç¹ã«ããã®çŽ æã¯æè»æ§ãšèä¹ æ§ãåããŠãããé垞㯠-67°F ïœ 257°F ã®ç¯å²ã§åäœããŸãã
EPDM ãããã (ãããªã«) ã Viton® (FKM) ãªã©ã®ä»ã®äžè¬çãªã·ãŒãªã³ã°æãšæ¯èŒãããšãEPDM ã¯åªããèæ°Žæ§ãšèåæ§ã§éç«ã£ãŠããŸãã ããã¯æ²¹ããŒã¹ã®çšéã«åªãã Viton® ã¯é«æž©ç°å¢ã«é©ããŠããŸããããã«ãEPDM ã¯æ¥µããŠæ±çšæ§ãé«ãã湿æ°ããªãŸã³ã玫å€ç·ã«å¹æçã«èããèœåããããŸãã
EPDM ã·ãŒã«ã®è£œé ã«ã¯ããŽã ã®å°åºæ圢ã䌎ãããšããããããŸãããã®ããã»ã¹ã§ã¯ãçã® EPDM ææãå ç±ããŠå¯éæ§ãæãããç®çã®ã·ãŒã«ã®åœ¢ç¶ã®åã«æ³šå ¥ããŸããå·åŽåŸãã·ãŒã«ãåãåºãã硬åããã»ã¹ãçµãŠãæçµçãªé©çšå¯èœãªç¹æ§ãå®çŸããŸãã
ç°å¢ã®æç¶å¯èœæ§ã EPDM ãåªããŠããç¹ã® 1 ã€ã§ãããã®çŽ æã¯ãªãµã€ã¯ã«å¯èœã§å¯¿åœãé·ãããã亀æé »åºŠãå°ãªããªããçµæãšããŠå»æ£ç©ãå°ãªããªããŸããããã«ãEPDM ã®è£œé ããã»ã¹ã¯æ¯æ§ãæ¯èŒçäœããããç°å¢ã«åªããåæãŽã ã®éžæè¢ãšããŠã®å°äœãããã«é«ãŸããŸãã
EPDMã·ãŒã«ã®ç¹åŸŽ
ææã®ç¹æ§ã¯ãç¹å®ã®çšéãžã®é©åæ§ãå€æããäžã§éåžžã«éèŠã§ããå©çšå¯èœãªããŸããŸãªã·ãŒãªã³ã°ææã®äžã§ãã EPDM ã·ãŒã«ã¯ãããŸããŸãªç£æ¥ç°å¢ã§éåžžã«æ±çšæ§ãé«ããå¹æçã§ããç¬èªã®äžé£ã®æ©èœãåããŠããŸãã
EPDM ã¯ãåžé žãã¢ã«ã«ãªãã±ãã³ãã¢ã«ã³ãŒã«ãªã©ã®æ¥µæ§æº¶åªã«å¯Ÿããåªããèè¬åæ§ã§ç¥ãããŠããŸãããã®ç¹æ§ã«ãããEPDM ã¯ååŠåŠçãå»æ°ŽåŠçã補è¬æ¥çã§ã®çšéã«éåžžã«åœ¹ç«ã¡ãŸããEPDM ã®èè¬åæ§ã¯ãå€ãã®åå¿æ§ååŠç©è³ªã«å¯Ÿããå®å®æ§ãšäžæŽ»æ§ãæäŸãã飜åãšã©ã¹ãããŒéªšæ Œã«ãããã®ã§ããåžé žãã¢ã«ã«ãªãå«ãåºç¯å²ã® pH å€ã«å¯Ÿãããã®ææã®èæ§ã¯ã匷ãååéåãä¿é²ãã極æ§ååæ§é ã«èµ·å ããè é£æ§ååŠæ»æã«å¯Ÿããèæ§ãæäŸããŸãã
枩床èæ§ã¯ãæ¶æ©ãå¯èœã«ãããžãšã³ã¢ãããŒãå«ãç¬èªã®ããªããŒæ§é ããçãŸãã EPDM ã·ãŒã«ã®ãã 1 ã€ã®æ³šç®ãã¹ãç¹æ§ã§ãããã®æ¶æ©ã«ãããææã¯é«ãåŒåŒµåŒ·åºŠãæã¡ã-67°F ã®æ¥µäœæž©ãã 257°F ã®é«æž©ãŸã§ãå¹ åºã枩床ç¯å²ã«èããããšãã§ããŸããåçµæ°åãèžæ°ã·ã¹ãã ãªã©ã®é«ç±çšéã§äœ¿çšããå ŽåãEPDM ã¯ç©ççç¹æ§ãç¶æãã枩床å€åã«ããã·ãŒã«ã®æ éã®ãªã¹ã¯ãæå°éã«æããŸãã
æè»æ§ãšèä¹ æ§ã«é¢ããŠãEPDM ã®æ§èœã¯ããã®ãŠããŒã¯ãªãšã©ã¹ãããŒç¹æ§ãšé«åºŠãªããªããŒçµ¡ã¿åãã«ãããã®ã§ããEPDM ã®éæ¶è³ªæ§é ã«ãããèªç±äœç©ååžãæ¹åãããæè»æ§ãåäžããŸããEPDM ã¯ãæ©èãåŒãè£ããè¡æã«æ¬è³ªçã«èæ§ãããååæ§é ã«ãããé«ãèç²åŽæ§ãšäœãå§çž®æ°žä¹ æªã¿ã瀺ããŸãã
EPDM ã¯ã玫å€ç·ããªãŸã³ãéé ·ãªæ°è±¡æ¡ä»¶ãžã®é·ææŽé²ã«èããèœåã«åªããŠããŸãããã®ç¹æ§ã¯ã飜å床ãšãé žåå£åãé²ãä¿è·é žåé²æ¢å€ããã³ UV å®å®å€ã®ååšã«ç±æ¥ããŸãããã®ææã®çŽ«å€ç·ããªãŸã³ããã®ä»ã®é žåå€ã«å¯Ÿããåºæã®èæ§ã¯ããã®é極æ§ç¹æ§ã«ç±æ¥ããèåãææã®å£åãåŒãèµ·ããããªãŒã©ãžã«ã«ã®åœ¢æãå¶éããŸãããã®ç¹æ§ã«ããã建èšæ©æ¢°ãèªåè»ã®ãŠã§ã¶ãŒã¹ããªãããªã©ãã·ãŒã«ãå®æçã«é¢šéšã«ãããããå±å€çšéã«ç¹ã«åœ¹ç«ã¡ãŸãã
EPDM ã¯èªé»çãšèªé»åŒ·åºŠã«åªããŠãããããåªããé»æ°çµ¶çžäœã§ãããã®ææã¯èªé»çãäœããé極æ§æ§é ã®ããèªç±ã€ãªã³ã®åããæå°éã«æããããé»æ°äŒå°æ§ã«èæ§ããããŸãããã®é»æ°çµ¶çžã¯ãå³æ Œãªé»æ°çµ¶çžãå¿ èŠãšããçšéã§ã¯ç¹ã«éèŠã§ãã
EPDM ã®ããŸã話é¡ã«äžããªãã貎éãªç¹æ§ã® 1 ã€ã«ãè²ã®å®å®æ§ããããŸããéªšæ Œã«äºéçµåããªããããå é žåå£åã«å¯Ÿããèæ§ããããè²ã®å¯¿åœãé·ããå ã®è²èª¿ãç¶æããããšãã§ããŸããé¡æãææãšçµã¿åããããšããã®ææã¯åªããè²å ç¢åºŠãçºæ®ããè²ã®å¿ å®æ§ãäžå¯æ¬ ãªãçŸèŠ³ã«ææãªçšéã«æé©ã§ãã
EPDMã·ãŒã«ã䜿çšããå©ç¹
EPDM ã·ãŒã«ãæäŸããå¹ åºãæ©èœã¯ãåœç¶ããŸããŸãªå©ç¹ã«ã€ãªãããããŸããŸãªæ¥çã§äººæ°ã®éžæè¢ãšãªã£ãŠããŸããããã§ã¯ãEPDM ã·ãŒã«ãä»ã®ã·ãŒã«ãšåºå¥ããäž»ãªå©ç¹ã«ã€ããŠè©³ãã説æããŸãã
- ã³ã¹ãå¹ç: EPDM ã·ãŒã«ã¯ã寿åœãšæ§èœç¹æ§ãèæ ®ãããšãViton® ãã·ãªã³ã³ãªã©ã®ä»ã®ã·ãŒã«æãããã³ã¹ãå¹çã«åªããŠããŸããç°å¢èŠå ãããŸããŸãªååŠç©è³ªã«å¯Ÿããèæ§ããããããé »ç¹ãªäº€æã®å¿ èŠæ§ãæžããå šäœçãªã³ã¹ãåæžã«ã€ãªãããŸãã
- ã¢ããªã±ãŒã·ã§ã³ã«ãããé·å¯¿åœ: EPDM ã·ãŒã«ã¯ãååŠçããã³æ©æ¢°çç¹æ§ãå ç¢ã§ãããããé·å¯¿åœã§ããããŸããŸãªå€éšèŠå ã«ããå£åã«å¯Ÿããèæ§ã«ãããé·æéã«ããã£ãŠå¹æãçºæ®ããç·ææã³ã¹ããåæžããŸãã
- ã¡ã³ããã³ã¹èŠä»¶ãæå°é: EPDM ã·ãŒã«ã¯ãèä¹ æ§ãšç°å¢æ¡ä»¶ãžã®èæ§ããããããäžè¬çã«ã¡ã³ããã³ã¹ã®å¿ èŠæ§ãäœããªããŸãããã®å©ç¹ã«ãããæ©åšã®ããŠã³ã¿ã€ã ãççž®ãããã¡ã³ããã³ã¹ã®äººä»¶è²»ãåæžãããŸãã
- è€æ°ã®æ¥çã«ãããæ±çšæ§: EPDM ã·ãŒã«ã¯ãååŠçãæ©æ¢°çãç±çç¹æ§ã«åªããŠãããããæ±çšæ§ãéåžžã«é«ããªã£ãŠããŸããèªåè»ãèªç©ºå®å®ãæ°ŽåŠçã補è¬æ¥çãªã©ãããŸããŸãªåéã§å¹ åºã䜿çšãããŠããŸãã
- å®å šæ§ã®åäž: EPDM ã®åªããèè¬åæ§ãšç±å®å®æ§ã«ãããæŒãããã®ä»ã®å±éºãªç¶æ ã«ã€ãªããã·ãŒã«ã®ç Žæã®ãªã¹ã¯ãæå°éã«æããå®å šæ§ãåäžããŸãããã®çŽ æã®çµ¶çžç¹æ§ã«ãããå®å šæ§ãé«ããããã«é»æ°çšéã§ã奜ãŸããŠããŸãã
- ç°å¢äžã®å©ç¹: EPDM ã¯é·å¯¿åœã§ãªãµã€ã¯ã«æ§ã«åªããŠãããããç°å¢äžã®å©ç¹ããããŸããããã«ã補é ããã»ã¹ã«ãããæ¯æ§ãæ¯èŒçäœããããä»ã®ã·ãŒãªã³ã°æãããæç¶å¯èœãªéžæè¢ãšãªããŸãã
- åãä»ãã®å®¹æã: EPDM ã·ãŒã«ã¯æè»æ§ãšåŒŸæ§ããããããä»ã®ã¿ã€ããããåãä»ããç°¡åã§ããå€ãã®å Žåãç¹æ®ãªããŒã«ãæ¥çå€ã䜿çšããã«åãä»ããããšãã§ãããããåãä»ãããã»ã¹ãè¿ éãã€ç°¡åã«ãªããŸãã
EPDMã·ãŒã«ã®äžè¬çãªçšé
èªåè»æ¥çã¯ãEPDM ã·ãŒã«ã®èä¹ æ§ãšèè¬åæ§ã«å€§ããäŸåããŠããŸãããããã®å質ã¯ãã·ãŒã«ãããŸããŸãªæž©åºŠãè é£æ§ã®æ¶²äœã«ãããããå·åŽã·ã¹ãã ããã¬ãŒã ã·ã¹ãã ã空調ãªã©ã®èªåè»çšéã§ã¯éåžžã«éèŠã§ããEPDM ã·ãŒã«ã¯é·å¯¿åœã§ã¡ã³ããã³ã¹èŠä»¶ãæå°éã§ãããããèªåè»è£œé ã§å¥œãŸããéžæè¢ãšãªããä¿¡é Œæ§ãé«ãã³ã¹ãå¹çã®é«ãè»äž¡ã«ã€ãªãããŸãã
æ°ŽåŠçæœèšã EPDM ã·ãŒã«ã®äœ¿çšããæ©æµãåããŠããŸããEPDM ã®åžéé žããã³ã¢ã«ã«ãªã«å¯Ÿããèæ§ã¯ãæ°ŽåŠçããã³å»æ°ŽåŠççšéã«ãããŠå€§ããªå©ç¹ã§ããããã§ã¯ãã·ãŒã«ã¯å¡©çŽ ããã®ä»ã®æ¶æ¯å€ãªã©ã®ååŠç©è³ªã«ãããããŸããEPDM ã®èè¬åæ§ã«ãããã·ãŒã«ã®å®å šæ§ã確ä¿ãããæŒãã®ãªã¹ã¯ã軜æžããããã©ã³ãå šäœã®å®å šæ§ãåäžããŸãã
補è¬æ¥çãé£åæ¥çã§ã¯ãEPDM ã·ãŒã«ã¯æ¯æ§ããªãFDA ã«æºæ ããŠãããããããŸããŸãªå å·¥è£ çœ®ã§ã®äœ¿çšã«æé©ã§ãããããã®æ¥çã§ã¯ãææã®å®å šæ§ãšè¡çã«é¢ããèŠå¶ãå³ããããšããããããŸããEPDM ã¯ååŠçã«å®å®ããŠãããããå»è¬å補å€ãé£åã°ã¬ãŒãã®ååŠç©è³ªã«ãããããçšéã«é©ããŠããŸããã·ãŒã«ã®å¯¿åœãé·ããããäžè²«ããããã©ãŒãã³ã¹ãä¿èšŒããã亀æé »åºŠãšæœåšçãªããŠã³ã¿ã€ã ãåæžãããŸãã
èªç©ºå®å®çšéã«ã¯ã極端ãªæž©åºŠå€åã軜éã§ãããªããå ç¢ãªææã®å¿ èŠæ§ãªã©ãç¹æã®èª²é¡ããããŸããEPDM ã·ãŒã«ã¯ãèç±æ§ãšè»œéæ§ã«ããããã®åéã§æå©ã§ããEPDM ã·ãŒã«ã¯ãèªç©ºæ©å ã®æ²¹å§ã·ã¹ãã ãçæã·ã¹ãã ããã£ãã³ ã·ãŒãªã³ã°çšéã§ãã䜿çšãããŸããEPDM ã®èè¬åæ§ãç±å®å®æ§ãªã©ã®å®å šæ§ã®åäžã¯ãææã®ç Žæãæ²æšãªçµæãæãå¯èœæ§ãããèªç©ºå®å®ã§ã¯ç¹ã«éèŠã§ãã
æåŸã«ã ç³æ²¹ã»ã¬ã¹æ¥çã§ã¯ããã«ãããã³ããæ²¹å§ã·ã¹ãã ãªã©ãããŸããŸãªçšé㧠EPDM ã·ãŒã«ãæ¡çšããŠããŸããEPDM ã¯äžè¬ã«çåæ°ŽçŽ ã«å¯ŸããŠèæ§ããããŸãããããã®åéã®ç¹æ®ãªçšéã§ã¯ãç¹å®ã®ã°ã¬ãŒãã® EPDM ã䜿çšã§ããŸãããã®çŽ æã®æ¥µç«¯ãªç°å¢æ¡ä»¶ã«å¯Ÿããå ç¢æ§ãšåãä»ãã®å®¹æãã¯ãç³æ²¹ã»ã¬ã¹äºæ¥ã§éåžžééããå³ããç°å¢ã§ã¯éåžžã«éèŠã§ãã
éé žåç©ãšç¡«é»ç¡¬å EPDM
EPDM ã·ãŒã«ãéžæããå Žåãå€ãã®å Žå ãéé žåç©ç¡¬ååãšç¡«é»ç¡¬ååã®ã©ã¡ããéžæããããéèŠãªæ±ºå®äºé ãšãªããŸããã©ã¡ãã®ã¿ã€ãããåªããèåæ§ãããŸããŸãªçšéã§ã®æ±çšæ§ãªã©ãEPDM ã®ã³ã¢ç¹æ§ãå ±æããŠããŸããã硬åããã»ã¹ã«ãã£ãŠæ©æ¢°çç¹æ§ãšååŠçç¹æ§ã倧ããå·Šå³ãããããšããããŸãã
éé žåç©ç¡¬å EPDM ã®è£œé ã§ã¯ã硬åå€ãšããŠææ©éé žåç©ã䜿çšãããèé«æž©æ§ãšèè¬åæ§ã«åªããããªããŒæ§é ãå®çŸããŸãããã®ç¡¬åã¿ã€ãã¯ããã匷åã§å®å®ããæ¶æ©çµåãæã¡ãããé«ãåŒåŒµåŒ·åºŠãšåªããå§çž®æ°žä¹ æªã¿èæ§ã«è²¢ç®ããŸããååŠçå®å®æ§ãé«ãŸã£ãŠãããããèªåè»ç£æ¥ãèªç©ºå®å®ç£æ¥ãªã©ãããåºç¯å²ã®ååŠç©è³ªã«ãããããçšéã«é©ããŠããŸãã
äžæ¹ãç¡«é»ç¡¬å EPDM ã¯ã硬åå€ãšããŠç¡«é»ã䜿çšãããããç¬èªã®å©ç¹ããããŸãããã®ç¡¬åæ¹æ³ã§ã¯ãäžè¬çã«ãããæè»ã§åŒŸåæ§ã®ããã·ãŒã«ãäœããã建èšãäœæž©çšéã§é«ãè©äŸ¡ãããå質ãåŸãããŸããéé žåç©ç¡¬å EPDM ã»ã©èè¬åæ§ã¯ãããŸããããç¡«é»ç¡¬åã¿ã€ãã¯ãããçãç¯å²ã®è¬åã«å¯ŸããŠç¢ºå®ã«æ©èœããäžè¬çã«ã³ã¹ãå¹çã«åªããŠããŸãã
2 ã€ãæ¯èŒãããšãéé žåç©ç¡¬å EPDM ã¯ãç¹ã«é«æž©ãå¹ åºãèè¬åæ§ãæ±ããããå³ããç°å¢ã§åªããŠããŸããäžæ¹ãç¡«é»ç¡¬å EPDM ã¯æè»æ§ãé«ã奜ãŸããããšãå€ããåªãã䌞ã³ç¹æ§ãæ±ããããåççšéã«æé©ã§ãã2 ã€ã®éžæã¯ãå€ãã®å Žåãå ·äœçãªçšéã®ããŒãºã«åž°çããèè¬åæ§ãèç±æ§ãæ©æ¢°çç¹æ§ãªã©ã®èŠçŽ ã®ãã©ã³ã¹ããšã£ãŠãååãªæ å ±ã«åºã¥ãã決å®ãäžããŸãã
çµè«
EPDM ã·ãŒã«ã®ç·åçãªå©ç¹ã¯ãçŸä»£ã®ç£æ¥æŽ»åã«ãããäžå¯æ¬ ãªåœ¹å²ã匷調ããŠããŸããæ倧ã®é¢å¿äºãèè¬åæ§ã枩床å€åãžã®é©å¿æ§ãç°å¢ã®æç¶å¯èœæ§ã®ãããã§ãã£ãŠããEPDM ã¯ãããã®èª²é¡ã«åªããèœåã§å¯ŸåŠããå€é¢çãªãœãªã¥ãŒã·ã§ã³ãæäŸããŸããã»ã¯ã¿ãŒã§ã®æ®éçãªæ¡çšãããã®åŒŸåæ§ãšæå¹æ§ãå®èšŒããŠããŸããéé žåç©ç¡¬å EPDM ãšç¡«é»ç¡¬å EPDM ãæ¯èŒãããšããã®ã«ããŽãªã§ã¯ããŸããŸãªçšéã®ç¹å®ã®èŠæ±ãæºããããã«èª¿æŽããã埮åŠãªãªãã·ã§ã³ãæäŸãããŠããããšãããã«æããã«ãªããŸããä»ã®ææãéžæããå Žåãšåæ§ã«ãæäœèŠä»¶ãå®å šã«ç解ããããšããç¥èã«åºã¥ããéžæãè¡ãããã«äžå¯æ¬ ã§ããåªããæ±çšæ§ãèä¹ æ§ãããã³ã³ã¹ãå¹çãåãã EPDM ã¯ãçŸä»£ã®ç£æ¥ç°å¢ã®å³ããæ¡ä»¶ã«ãããã·ãŒã« ãœãªã¥ãŒã·ã§ã³ã®åªããåè£ã§ããç¶ããŠããŸããåœç€Ÿã®ãªã³ã©ã€ã³ ã¹ãã¢ã䜿çšããŠä»ãã EPDM ã·ãŒã«ãè³Œå ¥ããããããã«è³ªåãåãåãããããå Žåã¯åœç€ŸãŸã§ãé£çµ¡ãã ããã