Iimeko zenkqubo yokuvelisa
Ifilimu ye-Stretch luhlobo lwempahla yokupakisha esetyenziswe ngokubambisana nomatshini ojikelezayo, osetyenziselwa ukupakisha izinto zokuthutha lula.Kwiintsuku zokuqala, iifilimu ezoluliweyo ze-LLDPE bezininzi iifilimu ezivuthelweyo, kwaye zaphuhliswa ukusuka kuluhlu olunye ukuya kumaleko amabini kunye noluhlu oluthathu.Ngophuhliso loqoqosho lwentlalo, ifilimu eyolulayo ye-LDPE ibe yeyona nto iphambili kwintengiso.
Iqondo lokushisa lokunyibilika kwefilimu eyoluliweyo lilawulwa ngokubanzi kwi-250 ℃ ~ 280 ℃, iqondo lobushushu bomqulu wokupholisa lilawulwa kwi-20 ℃ ~ 30 ℃, ukunyanzeliswa kwamajiko kufuneka kube phantsi, ngokubanzi ngaphakathi kwe-10kg, ukwenzela ukuba kube lula i-viscosity. i-agent Hambisa ngaphandle ngelixa unciphisa uxinzelelo lwangaphakathi lwefilimu egqityiweyo.Le yimiqathango yenkqubo yemveliso.
Ukulawula ukuncamathela
I-viscosity enhle yenza ukuba ifilimu yokupakisha kunye neengqimba ezingaphandle kwempahla zinamathele kunye ukwenza iimpahla ziqine.Kukho iindlela ezimbini eziphambili zokufumana i-viscosity: enye kukongeza i-PIB okanye i-masterbatch yayo kwipolymer;enye kukudibanisa iVLDPE .I-PIB iyilwelo lwe-viscous oluguquguqukayo, izixhobo ezikhethekileyo okanye ukuguqulwa kwezixhobo ezifunekayo ukongezwa ngokuthe ngqo, kwaye i-PIB masterbatch isetyenziswa ngokubanzi.Kukho inkqubo yokufuduka kwe-PIB, edla ngokuthatha iintsuku ezintathu, kwaye ikwachatshazelwa bubushushu.Xa ubushushu buphezulu, i-viscosity yomelele;xa iqondo lokushisa liphantsi, alinamathele kakhulu, kwaye i-viscosity iyancipha kakhulu emva kokwelula.Ngoko ke, ifilimu egqityiweyo igcinwe kakuhle kwiqondo elithile lokushisa (iqondo lokushisa eliphakanyisiweyo liyi-15 ℃ ~ 25 ℃).Idityaniswe ne-VLDPE, i-viscosity ihlwempuzekile, kodwa akukho mfuneko ikhethekileyo yezixhobo.I-viscosity izinzile, ayilawulwa lixesha, kodwa ichaphazeleka nobushushu.Ubushushu bubonakala xa ubushushu bungaphezulu kwama-30°C, kwaye i-viscosity iba mbi kancinane xa ubushushu bungaphantsi kwe-15°C.Lungisa inani le-LLDPE kwi-adhesive layer ukufezekisa i-viscosity efunekayo.Le ndlela isetyenziswa ikakhulu umaleko-ntathu co-extrusion.