Chii chinonzi Biaxially Oriented Polypropylene Overwrap Firimu?

Biaxially oriented polypropylene (BOPP) firimu imhando yeinochinjika yekurongedza firimu.Biaxially oriented polypropylene overwrap firimu yakatambanudzwa mumushini uye inochinjika nzira.Izvi zvinokonzeresa kutenderera kwema molecular cheni mumativi ese.

Iyi mhando yeinochinjika yekurongedza firimu inogadzirwa kuburikidza ne tubular yekugadzira maitiro.Bhamu refirimu rakaita sechubhu rinoputirwa uye rinopisa kusvika pakupfava kwaro (izvi zvakasiyana kubva pakunyunguduka) uye rinotambanudzwa nemichina.Iyo firimu inotambanudza pakati pe300% - 400%.

Neimwe nzira, iyo firimu inogona zvakare kutambanudzwa nemaitiro anozivikanwa setenter-frame film kugadzira.Nehunyanzvi uhu, mapolymer anokwidziridzwa pane yakanyoroveswa cast roll (inozivikanwawo sebeshi shiti) uye inodhonzwa pamwe nemuchina nzira.Tenter-frame film kugadzira inoshandisa akati wandei ma rolls kugadzira iyi firimu.

Iyo tende-frame maitiro anowanzo kutambanudza firimu 4.5: 1 munzira yemuchina uye 8.0:1 munzira yakachinjika.Izvo zvataurwa, zviyero zvinogadziriswa zvizere.

Iyo tende-frame process ndiyo yakajairika kupfuura iyo tubular musiyano.Inogadzira firimu rinopenya, rakajeka.Biaxial orientation inowedzera simba uye inokonzeresa kuoma kwepamusoro, kuwedzera kujeka, uye kuramba kwakanyanya kumafuta negirizi.

BOPP firimu zvakare inozvirumbidza yakawedzera zvipingamupinyi zvivakwa kune mhute uye oksijeni.Impact kuramba uye flexcrack kuramba zviri nani zvakanyanya neBOPP maringe nepolypropylene shrink firimu.

Biaxially oriented polypropylene overwrap mafirimu anonyanya kushandiswa kurongedza chikafu.Ivo vari kukurumidza kutsiva cellophane kune maapplication anosanganisira snack chikafu uye kurongedza fodya.Izvi zvinonyanya kukonzerwa nehukuru hwavo hwepamusoro uye mutengo wakaderera.

Makambani mazhinji anosarudza kushandisa BOPP panzvimbo yemafirimu echinyakare anodzikira sezvo achiratidzira zvivakwa zvakakwidziridzwa uye kugona kuri pamusoro kune izvo zveyakajairwa flexible ekurongedza mafirimu.

Izvo zvinofanirwa kucherechedzwa kuti kupisa chisimbiso kwakaoma kune BOPP mafirimu.Zvisinei, izvi zvinogona kuitwa nyore nekupfekedza firimu mushure mekugadzirisa nechinhu chinopisa-chinovharidzirwa kana kuti co-extruding ne-co-polymer isati yagadziriswa.Izvi zvichaguma mune yakawanda-layer firimu.