cellophane

Cellophane ndiyo yekare yakajeka yekurongedza chigadzirwa chinoshandiswa kuputira makuki, zvihwitsi uye nzungu.Cellophane yakatanga kutengeswa muUnited States muna 1924 uye yaive firimu rekutanga rekurongedza rakashandiswa kusvika kuma1960s.Mumusika wemazuva ano unokoshesa zvakatipoteredza, cellophane iri kudzoka.Nekuti cellophane iri 100% biodegradable, inoonekwa seimwe nzira ine hushamwari kune nharaunda kune iripo yekurongedza.Cellophane zvakare ine avhareji yemvura mhute chiyero pamwe nekunaka machinability uye kupisa kuvharika, ichiwedzera mukurumbira wayo wazvino mumusika wekurongedza chikafu.

Kusiyana nemapolima anogadzirwa nevanhu mumapurasitiki, ayo anonyanya kutorwa kubva mupetroleum, cellophane ipolymer yakasikwa yakagadzirwa kubva ku cellulose, inova chikamu chezvirimwa nemiti.Cellophane haina kugadzirwa kubva kumiti inonaya mvura, asi kubva pamiti yakakura uye yakakohwewa yakanangana nekugadzirwa kwe cellophane.

Cellophane inogadzirwa nekugaya huni uye donje pulp munhevedzano yemakemikari ekugezera anobvisa tsvina uye anopwanya macheni akareba efiber mune ino mbishi.Yakagadziridzwa kuita firimu rakajeka, rinopenya nemakemikari epurasitiki akawedzerwa kuti awedzere kushanduka, cellophane ichiri kunyanya kuumbwa necrystalline cellulose mamorekuru.

Izvi zvinoreva kuti inogona kuputswa nema microorganisms ari muvhu semashizha nezvirimwa.Cellulose ndeyekirasi yemakomisheni mune organic chemistry inonzi makabhohaidhiretsi.Iyo yakakosha unit ye ​​cellulose ndiyo glucose molecule.Zviuru zvemamorekuru aya eglucose anobatana panguva yekukura kwechirimwa kuita cheni dzakareba dzinonzi cellulose.Maketani aya, anoputsika panguva yekugadzira kuti agadzire mafirimu e cellulose anoshandiswa asina kuvharwa kana kuvharwa fomu mukurongedza.

Kana akavigwa, asina kuvharwa cellulose mafirimu anowanzo shatisa mumazuva gumi kusvika makumi matatu;Mafirimu akavharidzirwa nePVDC akawanikwa achideredza mumazuva makumi mapfumbamwe kusvika ku120, uye nitrocellulose-coated cellulose yakaderedzwa mumazuva 60 kusvika ku90.

Bvunzo dzakaratidza kuti avhareji yenguva yekupedzisa biodegradation yemafirimu e cellulose imazuva makumi maviri nemasere kusvika makumi matanhatu ezvigadzirwa zvisina kuvharwa uye mazuva makumi masere kusvika zana nemakumi maviri ezvigadzirwa zvakavharwa cellulose.Mumvura yedhamu, mwero webiodegradation waive mazuva gumi efirimu risina kuvharwa uye mazuva makumi matatu efirimu rakavharwa cellulose.Kunyange zvinhu zvinonzi zvinoora zvakanyanya, zvakadai semapepa nemashizha egirinhi, zvinotora nguva yakareba kuti zvidzike pane zvigadzirwa zvemafirimu e-cellulose.Kusiyana neizvi, mapurasitiki, polyvinyl chloride, polyethylene, polyethylene terephthalate uye oriented polypropylene yakaratidza chiratidzo chiduku chekuora mushure mekuvigwa kwenguva refu. 

Cellophane mafirimu anoshandiswa mumhando dzakasiyana dzekurongedza, kusanganisira:

-Maswiti, kunyanya twist wrap

- Kadhibhodhi lamination

– Mbiriso

– chizi nyoro

- Tampon kurongedza

-Akasiyana siyana maindasitiri ekushandisa senge substrates yeanozvinamira matepi, permeable membranes mune semi-mamwe marudzi emabhatiri, uye maajenti ekuburitsa mukugadzira fiberglass uye zvigadzirwa zverabha.

– chikafu giredhi

- Nitrocellulose coating

- PVDC coating

- Pharmaceutical Packaging

- adhesive tepi

– Ruvara firimu