Kwinkqubo yemveliso yeIlaphu le-PP elingalukwanga, izinto ezahlukeneyo zinokuchaphazela iipropati ezibonakalayo zemveliso. Ukuhlalutya ubudlelwane phakathi kwezi zinto kunye nokusebenza kwemveliso kunceda ukulawula ngokuchanekileyo iimeko zenkqubo kunye nokufumana umgangatho ophezulu kunye neemveliso zelaphu zePP ezingalukwanga ngokubanzi. Apha ngezantsi, umhleli welaphu elingalukwanga likaChengxin uya kuhlalutya ngokufutshane ezona zinto ziphambili ezinempembelelo kwiipropathi ze-PP ezingalukwanga, kwaye wabelane naye wonke umntu:
1. Isalathisi sokunyibilikisa kunye nokusabalalisa ubunzima be-molecular ye-PP engeyiyo yolukiweyo yelaphu ye-polypropylene chips
Iimpawu eziphambili zomgangatho we-polypropylene chips zinobunzima be-molecular, ukusabalalisa ubunzima be-molecular, rhoqo, isalathisi se-melt, kunye nomxholo womlotha. Iitshiphusi zePP ezisetyenziselwa ukusonta zinobunzima bemolekyuli phakathi kwe-100000 kunye ne-250000, kodwa uqheliselo lubonise ukuba iimpawu ze-rheological zokunyibilika zingcono xa ubunzima bemolekyuli bepolypropylene bujikeleze i-120000, kwaye isantya sayo esiphezulu esivumelekileyo sokujikeleza siphezulu. Isalathisi sokunyibilika yiparameter ebonisa iimpawu zerheological zokunyibilika, kunye nesalathisi sokunyibilika kweetshiphusi zepolypropylene ezisetyenziselwai-spunbondngokuqhelekileyo phakathi kwe-10 kunye ne-50. Ngethuba lenkqubo yokujikeleza, i-filament ifumana kuphela idrafti yomoya omnye, kwaye umlinganiselo wedrafti we-filament ulinganiselwe yi-rheological properties of melt.
Ubukhulu be-molecular weight, okt incinci isalathisi sokunyibilika, ihlwempuzekileyo iimpawu zayo ze-rheological. Ubuncinci umlinganiselo wedrafti ofunyenwe yi-filament, ubukhulu besayizi yefiber ye-filament efunyenwe phantsi kwexabiso elifanayo le-melt ekhutshwe kwi-spinneret, okubangelwa ukuvakalelwa kwesandla esinzima kwi-PP engalukiweyo ilaphu. Ukuba isalathisi sokunyibilika siphezulu, i-viscosity ye-melt iyancipha, iimpawu ze-rheological zilungile, kwaye ukuchasana nokwelula kuyancipha. Ngaphantsi kweemeko ezifanayo zokwelula, i-multiple of stretching iyanda. Njengoko i-orientation ye-macromolecules inyuka, amandla okuphuka kwe-PP engalukiweyo iya kunyuka, kwaye ubungakanani befiber ye-filament buya kuncipha, kubangele ukuthungwa okuthambileyo kwendwangu. Ngaphantsi kwenkqubo efanayo, iphezulu isalathisi sokunyibilika kwe-polypropylene, incinci isayizi yayo yefiber, kwaye inkulu amandla ayo okuphuka.
Ukuhanjiswa kobunzima bemolekyuli kudla ngokulinganiswa ngomlinganiselo (Mw/Mn) wobunzima bobunzima bemolekyuli (Mw) ukuya kwinani eliphakathi kobunzima bemolekyuli (Mn) yepolymer, eyaziwa ngokuba yi-molecular weight distribution value. Ixabiso elincinci le-molecular weight distribution value, lizinzile ngakumbi iimpawu ze-rheological zokunyibilika kwayo, kunye nenkqubo ejikelezayo ezinzileyo, ehambelana nokuphucula isantya sokujikeleza. Ikwanayo nokunyibilika okusezantsi okunyibilikayo kunye nokuqina kwe-viscosity, enokunciphisa uxinzelelo lokujikeleza, yenza iPP ibe lula ukuyolula kwaye icokiseke, kwaye ifumane imicu ye-denier ecocekileyo. Ngaphezu koko, ukufana kokwakheka kwewebhu kulungile, kunye nesandla esilungileyo kunye nokufana.
2. PP elaphu non-elukiweyo ubushushu ukusonta
Ukusetwa kobushushu obujikelezayo kuxhomekeke kwisalathiso sokunyibilika kwezinto ezikrwada kunye neemfuno zeempawu ezibonakalayo zemveliso. Ukuphakama kwesalathiso sokunyibilika kwezinto ezikrwada, kokukhona kuphezulu ubushushu obujikelezayo obuhambelanayo, kwaye ngokuchaseneyo. Iqondo lokushisa elijikelezayo lihambelana ngqo ne-viscosity ye-melt, kwaye iqondo lokushisa liphantsi. I-viscosity ye-melt iphezulu, yenza ukujikeleza kunzima kwaye kukulungele ukuvelisa iifayili eziphukileyo, eziqinileyo okanye ezinqabileyo, ezichaphazela umgangatho wemveliso. Ngoko ke, ukuze kuncitshiswe i-viscosity yokunyibilika kunye nokuphucula iimpawu zayo ze-rheological, indlela yokunyusa izinga lokushisa iyamkelwa ngokubanzi. Ubushushu obujikelezayo bunempembelelo ebalulekileyo kwisakhiwo kunye neempawu zemicu. Okukhona usezantsi ubushushu obujikelezayo, kokukhona ukuqina kwe-viscosity yokunyibilika, kokukhona ukuxhathisa okukhulu, kwaye kokukhona kunzima ukolula intambo ukuze ufumane ubungakanani befiber efanayo.
Ixesha lokuposa: Mar-16-2024