izindaba

1.Aramid fibre imishini

Igama eligcwele le-aramid fibre i-aromatic polyamide fiber.Kuyi-polymer eqondile eyakhiwe ngamaqembu anephunga elimnandi namaqembu e-amide.Inezici ezinhle kakhulu zemishini, ukwakheka kwamakhemikhali okuzinzile, izakhiwo ezifanelekile zemishini, amandla aphezulu kanye nemodulus ephezulu., ukumelana nokushisa okuphezulu, ukumelana ne-asidi ne-alkali, isisindo esilula, ukumelana nokugqoka nezinye izinto ezinhle kakhulu.Isetshenziswe kakhulu emikhakheni efana nemishini yokuvikela inhlamvu, i-aerospace, ukwakhiwa kanye nemishini kagesi.

Kodwa-ke, i-aramid fiber nayo inezinkinga ezimbili ezinkulu

(1) I-Aramid fiber inokumelana ne-UV okungekuhle.Imisebe ye-Ultraviolet (ukukhanya kwelanga) ibangela ukuwohloka kwemicu ye-aramid.Ngakho-ke, ungqimba oluvikelayo luyadingeka, okungaba i-topcoat noma ungqimba lwezinto ezibonakalayo, isibonelo, izintambo ze-aramid zivame ukuvalwa ngesendlalelo sokuzivikela.

(2) I-Aramid fiber ine-hygroscopicity ephezulu uma kuqhathaniswa (kufika ku-6% wesisindo sayo), ngakho-ke izinto ezihlanganisiwe ze-aramid fiber zidinga ukuvikelwa ngendlela efanele, njengamajazi angaphezulu avame ukusetshenziselwa ukunciphisa i-hygroscopicity.Ukwengeza, ukusetshenziswa kwezinhlobo ezithile ze-aramid kunciphisa ukumunca kwamanzi kwenhlanganisela lapho ichayeke emanzini, njenge-Kevlar 149 noma i-Armos.

Imishini ye-2.PE fiber

I-PE empeleni ibhekisela ku-UHMW-PE, okuyi-polyethylene yesisindo samangqamuzana aphezulu kakhulu.Kuyi-organic fiber esebenza kahle kakhulu eyasungulwa ekuqaleni kwawo-1980.Kanye ne-carbon fiber ne-aramid, yaziwa njengemicu emithathu emikhulu yobuchwepheshe obuphezulu emhlabeni namuhla.Inokusimama okuphakeme kakhulu futhi kunzima kakhulu ukuyehlisa, okubangela ukungcoliswa kwemvelo okukhulu.Kodwa kungenxa yalesi sici ukuthi iba yinto ekahle yokwenza izikhali zomzimba.Ngaphezu kwalokho, imelana nezinga lokushisa eliphansi, ukukhanya kwe-UV, namanzi.

Mayelana nokuvimbela izinhlamvu zejubane eliphansi, ukusebenza kwe-bulletproof kwe-PE fiber cishe ku-30% ephakeme kunaleyo ye-aramid;mayelana nokuvimbela izinhlamvu zejubane eliphezulu, ukusebenza kwe-PE fiber yi-1.5 izikhathi ezingu-2 kune-aramid.Kungashiwo ukuthi ukushiyeka kwe-aramid fiber sekuphenduke izinzuzo ze-PE fiber, futhi izinzuzo ze-aramid fiber ziye zaba ngcono ku-PE fiber.Ngakho-ke, kuwumkhuba ongenakugwemeka we-PE fiber ukufaka esikhundleni se-aramid emkhakheni wokuvikela.

Vele, i-PE fiber nayo inokushiyeka.Izinga layo lokumelana nezinga lokushisa liphansi kakhulu kune-aramid fiber.Izinga lokushisa lokusetshenziswa kwemikhiqizo yokuvikela i-PE fiber ingaphakathi kuka-70 ° C (okungahlangabezana nezidingo zomzimba womuntu kanye nemishini, okungukuthi, imfuneko yokumelana nezinga lokushisa engu-55 ° C).Ngale kwalokhu kushisa, ukusebenza kwehla ngokushesha.Uma izinga lokushisa lidlula i-150 ° C, i-PE fiber izoncibilika, futhi i-aramid fiber I-fiber isengakwazi ukugcina izakhiwo ezinhle zokuzivikela endaweni ye-200 ° C, futhi ayincibiliki noma ibole ku-500 ° C;lapho ihlangabezana nezinga lokushisa elingaphezu kuka-900°C, izokhishwa ngekhabhoni ngokuqondile ukuze yakhe isendlalelo sokushisa ukushisa.Lezi azitholakali emikhiqizweni yokuvikela i-fiber ye-PE futhi seziphenduke izinzuzo eziyingqayizivele zemikhiqizo ye-aramid.