i-cellophane

I-Cellophane yeyona mveliso yakudala yokupakisha ecacileyo esetyenziselwa ukusonga iikuki, iilekese kunye namandongomane.I-Cellophane yaqala ukuthengiswa e-United States ngo-1924 kwaye yayiyeyona filim yokuqala yokupakisha eyayisetyenziswa de kwaba ngoo-1960.Kwimarike yanamhlanje ekhathalela ngakumbi indalo, i-cellophane iyabuya.Ngenxa yokuba i-cellophane i-100% i-biodegradable, ibonwa njengenye indlela ehambelana nokusingqongileyo kwipakethe ekhoyo.I-Cellophane inomlinganiselo womphunga wamanzi ophakathi kunye nokusebenza okugqwesileyo kunye nokutywinwa kobushushu, ukongeza ekuthandeni kwayo ngoku kwimarike yokupakisha ukutya.

Ngokungafaniyo neepolymers ezenziwe ngabantu kwiiplastiki, eziphuma ikakhulu kwi-petroleum, i-cellophane i-polymer yendalo eyenziwe kwi-cellulose, eyinxalenye yezityalo kunye nemithi.I-Cellophane ayenziwanga kwimithi yamahlathi, kodwa kwimithi ekhuliswe kwaye ivunwe ngokukodwa ukuveliswa kwe-cellophane.

I-Cellophane yenziwe ngokugaya iinkuni kunye ne-cotton pulp kuluhlu lweekhemikhali zokuhlambela ezisusa ukungcola kwaye ziphule amatyathanga amade efiber kule mveliso eluhlaza.Ihlaziywe kwifilimu ecacileyo, ecwebezelayo kunye neekhemikhali zeplastiki ezongeziweyo ukuphucula ukuguquguquka, i-cellophane isaqulunqwa kakhulu yi-crystalline cellulose molecules.

Oku kuthetha ukuba inokophulwa ziintsholongwane ezisemhlabeni njengamagqabi nezityalo.I-Cellulose yeyodidi lweekhompawundi kwi-organic chemistry ebizwa ngokuba ziicarbohydrates.Iyunithi esisiseko ye-cellulose yi-molecule ye-glucose.Amawaka ezi molekyuli zeglucose ziyadibana ngexesha lokukhula kwesityalo ukuze zenze amatyathanga amade abizwa ngokuba yicellulose.La matyathanga, nawo, aqhekeka ngexesha lemveliso ukwenza iifilimu zeselulosi ezisetyenziswa kwifomu engafakwanga okanye egqunyiweyo ekupakishweni.

Xa zingcwatywa, iifilimu zeselulosi ezingafakwanga zidla ngokuthomalalisa kwiintsuku ezili-10 ukuya kwezingama-30;Iifilimu ezifakwe kwi-PVDC zifunyenwe zihlanjululwe kwiintsuku ze-90 ukuya kwii-120, kunye ne-nitrocellulose-coated cellulose yachithwa kwiintsuku ezingama-60 ukuya kwii-90.

Uvavanyo lubonise ukuba i-avareji yexesha elipheleleyo lokugqiba i-biodegradation yeefilimu ze-cellulose yi-28 ukuya kwii-60 iintsuku zeemveliso ezingagqunywanga kunye neentsuku ezingama-80 ukuya kwezili-120 kwiimveliso ze-cellulose ezigqunyiweyo.Emanzini echibi, izinga lokuthotywa kwebhayoloji yayiziintsuku ezili-10 zefilimu engagqunywanga kunye neentsuku ezingama-30 zefilimu egqunywe ngeselulosi.Kwanezinto ezigqalwa njengezinokonakala kakhulu, njengephepha namagqabi aluhlaza, zithatha ixesha elide ukuwohloka kunemveliso yefilimu yecellulose.Ngokwahlukileyo, iiplastiki, i-polyvinyl chloride, i-polyethylene, i-polyethylene terephthalate kunye ne-polypropylene e-oriented yabonisa uphawu oluncinci lokuthotywa emva kokungcwatywa ixesha elide.